/* ═══════════════════════════════════════════════════════════════════
   CGPAPro.COM — styles.css
   Theme: Bright Academic — Soft sky, indigo accents, sunshine highlights
   Fonts: Outfit (display) + Plus Jakarta Sans (body)
   Production-ready · Mobile-first · Fully accessible
═══════════════════════════════════════════════════════════════════ */
@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@400;500;600;700;800&family=Plus+Jakarta+Sans:ital,wght@0,400;0,500;0,600;0,700;1,400&display=swap');

/* ── Design Tokens ─────────────────────────────────────────────── */
:root {
    --indigo-50:#eef2ff;--indigo-100:#e0e7ff;--indigo-200:#c7d2fe;
    --indigo-400:#818cf8;--indigo-500:#6366f1;--indigo-600:#4f46e5;
    --indigo-700:#4338ca;--indigo-900:#1e1b4b;
    --sky-50:#f0f9ff;--sky-100:#e0f2fe;--sky-200:#bae6fd;--sky-500:#0ea5e9;
    --teal-50:#f0fdfa;--teal-100:#ccfbf1;--teal-500:#14b8a6;--teal-600:#0d9488;
    --amber-50:#fffbeb;--amber-100:#fef3c7;--amber-400:#fbbf24;--amber-500:#f59e0b;--amber-600:#d97706;
    --rose-50:#fff1f2;--rose-100:#ffe4e6;--rose-500:#f43f5e;--rose-600:#e11d48;
    --emerald-50:#ecfdf5;--emerald-100:#d1fae5;--emerald-500:#10b981;--emerald-600:#059669;
    --green-500:#22c55e;
    --gray-50:#f8fafc;--gray-100:#f1f5f9;--gray-200:#e2e8f0;--gray-300:#cbd5e1;
    --gray-400:#94a3b8;--gray-500:#64748b;--gray-600:#475569;--gray-700:#334155;
    --gray-800:#1e293b;--gray-900:#0f172a;--white:#ffffff;

    --bg:#fafbff;--bg-alt:#f4f6ff;--surface:#ffffff;--surface-alt:#fafbff;
    --border:#e6eaf3;--border-soft:#f0f3fa;
    --text:#1a1d2e;--text-soft:#4a5070;--text-muted:#6b7290;

    --primary:var(--indigo-600);--primary-hover:var(--indigo-700);--primary-soft:var(--indigo-50);

    --cgpa:var(--indigo-600);--cgpa-bg:var(--indigo-50);--cgpa-soft:var(--indigo-100);
    --sgpa:var(--teal-600);--sgpa-bg:var(--teal-50);--sgpa-soft:var(--teal-100);
    --pct:var(--amber-600);--pct-bg:var(--amber-50);--pct-soft:var(--amber-100);

    --font-display:'Outfit',system-ui,sans-serif;
    --font-body:'Plus Jakarta Sans',system-ui,sans-serif;

    --r-sm:6px;--r-md:10px;--r-lg:16px;--r-xl:20px;--r-2xl:28px;--r-full:9999px;

    --sh-xs:0 1px 2px rgba(20,24,60,.04);
    --sh-sm:0 1px 3px rgba(20,24,60,.06),0 1px 2px rgba(20,24,60,.04);
    --sh-md:0 4px 12px rgba(20,24,60,.08),0 2px 4px rgba(20,24,60,.04);
    --sh-lg:0 10px 30px rgba(20,24,60,.10),0 4px 8px rgba(20,24,60,.05);
    --sh-xl:0 20px 50px rgba(20,24,60,.12),0 8px 16px rgba(20,24,60,.06);
    --sh-glow:0 0 0 4px rgba(99,102,241,.15);

    --ease:cubic-bezier(.4,0,.2,1);--ease-out:cubic-bezier(0,0,.2,1);
    --t-fast:140ms var(--ease);--t-norm:240ms var(--ease);--t-slow:400ms var(--ease);

    --max-w:1180px;
}

/* ── Reset ─────────────────────────────────────────────────────── */
*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{font-size:16px;scroll-behavior:smooth;-webkit-text-size-adjust:100%;scroll-padding-top:88px;}
body{font-family:var(--font-body);font-size:1rem;line-height:1.7;color:var(--text);background:var(--bg);
     -webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale;text-rendering:optimizeLegibility;overflow-x:hidden;}
img,svg{display:block;max-width:100%;}
button{font-family:inherit;}

::selection{background:var(--indigo-200);color:var(--indigo-900);}

a{color:var(--primary);text-decoration:none;text-underline-offset:3px;transition:color var(--t-fast);}
a:hover{color:var(--primary-hover);text-decoration:underline;}

/* ── Typography ────────────────────────────────────────────────── */
h1,h2,h3,h4{font-family:var(--font-display);line-height:1.2;color:var(--gray-900);letter-spacing:-.02em;}
h1{font-size:clamp(2rem,5vw,3.4rem);font-weight:800;}
h2{font-size:clamp(1.5rem,3vw,2.1rem);font-weight:700;}
h3{font-size:clamp(1.05rem,2vw,1.25rem);font-weight:700;margin-top:1.5rem;margin-bottom:.5rem;}
h4{font-size:1rem;font-weight:600;}
p{color:var(--text-soft);margin-bottom:1rem;}
strong{font-weight:700;color:var(--text);}
em{font-style:italic;}
ul,ol{padding-left:1.5rem;margin-bottom:1rem;color:var(--text-soft);}
li{margin-bottom:.4rem;}
code{font-family:ui-monospace,'JetBrains Mono',monospace;font-size:.88em;background:var(--gray-100);
     color:var(--indigo-700);padding:.15em .45em;border-radius:var(--r-sm);}

/* ── Layout helpers ────────────────────────────────────────────── */
.page-body{max-width:var(--max-w);margin:0 auto;padding:3rem 1.25rem 5rem;}
.section-header{text-align:center;max-width:620px;margin:0 auto 2.5rem;}
.kicker{display:inline-block;padding:.35rem .85rem;background:var(--indigo-50);color:var(--indigo-700);
        border-radius:var(--r-full);font-size:.78rem;font-weight:700;letter-spacing:.06em;
        text-transform:uppercase;margin-bottom:.75rem;}
.section-title{margin-bottom:.6rem;}
.section-sub{color:var(--text-muted);font-size:1.02rem;line-height:1.65;margin-bottom:0;}
.content-section{margin-bottom:4rem;}

/* ═══════════════════════════════════════════════════════════════
   BRAND LOGO (used in header.php + footer.php)
═══════════════════════════════════════════════════════════════ */
.brand,.footer-brand,.footer-brand-inline{
    display:inline-flex;align-items:baseline;gap:0;
    font-family:var(--font-display);font-weight:800;
    text-decoration:none;letter-spacing:-.02em;
    line-height:1;flex-shrink:0;
}
.brand{font-size:1.4rem;color:var(--gray-900);}
.footer-brand{font-size:1.6rem;color:var(--gray-900);margin-bottom:1rem;}
.footer-brand-inline{font-size:1rem;color:var(--gray-900);}
.brand:hover,.footer-brand:hover,.footer-brand-inline:hover{text-decoration:none;}

.brand-mark{color:var(--green-500);}
.brand-mark.mark-pro{color:var(--gray-900);}
.brand-dot{color:var(--gray-900);}
.brand-tld{color:var(--rose-500);}

/* On dark/light contexts brand always reads */
.footer-brand .brand-mark.mark-pro,
.footer-brand .brand-dot,
.footer-brand-inline .brand-mark.mark-pro,
.footer-brand-inline .brand-dot{color:var(--gray-900);}

/* ═══════════════════════════════════════════════════════════════
   HEADER
═══════════════════════════════════════════════════════════════ */
.site-header{
    position:sticky;top:0;z-index:100;
    background:rgba(255,255,255,.85);
    backdrop-filter:saturate(180%) blur(14px);
    -webkit-backdrop-filter:saturate(180%) blur(14px);
    border-bottom:1px solid var(--border-soft);
    transition:box-shadow var(--t-norm),background var(--t-norm);
}
.site-header.scrolled{box-shadow:var(--sh-sm);background:rgba(255,255,255,.95);}

.header-inner{
    max-width:var(--max-w);margin:0 auto;padding:.85rem 1.25rem;
    display:flex;align-items:center;gap:1.5rem;position:relative;
}

/* Primary nav */
.primary-nav{
    display:flex;align-items:center;gap:1rem;
}
.primary-nav ul{
    display:flex;align-items:center;gap:.25rem;
    list-style:none;padding:0;margin:0;
}
.primary-nav a{
    display:inline-block;padding:.5rem 1rem;
    font-size:.92rem;font-weight:600;color:var(--text-soft);
    text-decoration:none;border-radius:var(--r-full);
    transition:background var(--t-fast),color var(--t-fast);
}
.primary-nav a:hover{
    background:var(--indigo-50);color:var(--primary);
    text-decoration:none;
}
.primary-nav a.active{
    background:var(--primary);color:var(--white);
}
.primary-nav a.active:hover{background:var(--primary-hover);color:var(--white);}

/* Install button */
.btn-install{
    margin-left:auto;
    display:inline-flex;align-items:center;gap:.5rem;
    padding:.55rem 1rem;border:none;border-radius:var(--r-full);
    background:linear-gradient(135deg,var(--amber-500),var(--amber-400));
    color:var(--white);font-size:.85rem;font-weight:700;
    cursor:pointer;box-shadow:var(--sh-sm);
    transition:transform var(--t-fast),box-shadow var(--t-fast);
    animation:pulseInstall 2.4s var(--ease) infinite;
}
.btn-install svg{width:14px;height:14px;flex-shrink:0;}
.btn-install:hover{transform:translateY(-1px);box-shadow:var(--sh-md);}
@keyframes pulseInstall{
    0%,100%{box-shadow:var(--sh-sm),0 0 0 0 rgba(245,158,11,.5);}
    50%    {box-shadow:var(--sh-sm),0 0 0 8px rgba(245,158,11,0);}
}

/* Hamburger toggle */
.nav-toggle{
    display:none;width:42px;height:42px;padding:9px;
    background:var(--gray-100);border:1px solid var(--border);
    border-radius:var(--r-md);cursor:pointer;flex-shrink:0;
    transition:background var(--t-fast);margin-left:auto;
}
.nav-toggle:hover{background:var(--indigo-50);}
.burger{position:relative;display:block;width:100%;height:2px;background:var(--gray-700);
        border-radius:2px;transition:transform var(--t-norm),background var(--t-norm);}
.burger::before,.burger::after{content:'';position:absolute;left:0;width:100%;height:2px;
                                background:var(--gray-700);border-radius:2px;
                                transition:transform var(--t-norm),opacity var(--t-norm);}
.burger::before{top:-6px;}.burger::after{top:6px;}
.nav-open .burger{background:transparent;}
.nav-open .burger::before{transform:translateY(6px) rotate(45deg);}
.nav-open .burger::after{transform:translateY(-6px) rotate(-45deg);}

/* ═══════════════════════════════════════════════════════════════
   HERO
═══════════════════════════════════════════════════════════════ */
.hero{
    position:relative;overflow:hidden;
    padding:4.5rem 1.25rem 4rem;text-align:center;
    background:
        radial-gradient(ellipse 80% 60% at 50% 0%,var(--indigo-50) 0%,transparent 60%),
        radial-gradient(ellipse 60% 50% at 90% 90%,var(--sky-50) 0%,transparent 60%),
        radial-gradient(ellipse 50% 40% at 10% 80%,var(--amber-50) 0%,transparent 60%),
        var(--bg);
    isolation:isolate;
}
.hero-blob{position:absolute;border-radius:50%;filter:blur(80px);opacity:.55;
           pointer-events:none;z-index:-1;}
.hero-blob-1{top:-100px;left:-80px;width:380px;height:380px;
             background:radial-gradient(circle,var(--indigo-200),transparent 70%);
             animation:float 14s ease-in-out infinite;}
.hero-blob-2{bottom:-120px;right:-100px;width:420px;height:420px;
             background:radial-gradient(circle,var(--amber-100),transparent 70%);
             animation:float 18s ease-in-out infinite reverse;}
@keyframes float{0%,100%{transform:translate(0,0) scale(1);}50%{transform:translate(30px,-25px) scale(1.06);}}

.hero-grid{position:absolute;inset:0;
    background-image:linear-gradient(rgba(99,102,241,.05) 1px,transparent 1px),
                     linear-gradient(90deg,rgba(99,102,241,.05) 1px,transparent 1px);
    background-size:48px 48px;
    mask-image:radial-gradient(ellipse 70% 70% at 50% 50%,black 30%,transparent 100%);
    -webkit-mask-image:radial-gradient(ellipse 70% 70% at 50% 50%,black 30%,transparent 100%);
    z-index:-1;pointer-events:none;}

.hero-inner{position:relative;max-width:760px;margin:0 auto;z-index:1;}

.hero-badge{
    display:inline-flex;align-items:center;gap:.5rem;
    padding:.45rem 1rem;background:var(--white);
    border:1px solid var(--indigo-100);border-radius:var(--r-full);
    color:var(--indigo-700);font-size:.85rem;font-weight:600;
    box-shadow:var(--sh-sm);margin-bottom:1.5rem;
    line-height:1;white-space:nowrap;
}
.hero-badge svg{
    display:inline-block;
    width:14px;height:14px;color:var(--amber-500);flex-shrink:0;
}

.hero-title{
    font-family:var(--font-display);
    font-size:clamp(2.2rem,6vw,4rem);font-weight:800;line-height:1.05;
    letter-spacing:-.035em;color:var(--gray-900);margin-bottom:1.25rem;
}
.hero-title-accent{
    background:linear-gradient(135deg,var(--indigo-600) 0%,var(--sky-500) 50%,var(--teal-500) 100%);
    -webkit-background-clip:text;background-clip:text;
    -webkit-text-fill-color:transparent;color:transparent;
    display:inline-block;
}

.hero-desc{font-size:clamp(1rem,1.6vw,1.15rem);color:var(--text-muted);
           margin-bottom:2rem;line-height:1.6;}
.hero-desc strong{color:var(--gray-900);font-weight:700;}

.hero-search{max-width:560px;margin:0 auto 2rem;}

.hero-features{
    display:flex;flex-wrap:wrap;justify-content:center;gap:.75rem;
    list-style:none;padding:0;margin:0;
}
.hero-features li{
    display:inline-flex;align-items:center;gap:.45rem;
    padding:.4rem .9rem;background:var(--white);
    border:1px solid var(--border);border-radius:var(--r-full);
    color:var(--text-soft);font-size:.85rem;font-weight:600;
    box-shadow:var(--sh-xs);margin-bottom:0;
}
.hero-features li svg{width:14px;height:14px;color:var(--emerald-500);flex-shrink:0;}

/* ═══════════════════════════════════════════════════════════════
   SEARCH (search.php)
═══════════════════════════════════════════════════════════════ */
.search-wrapper{position:relative;width:100%;max-width:560px;margin:0 auto;}

.search-input-wrap{position:relative;}
.search-icon{
    position:absolute;left:1.1rem;top:50%;transform:translateY(-50%);
    width:18px;height:18px;color:var(--gray-400);pointer-events:none;
    transition:color var(--t-fast);
}
.search-wrapper .search-input{
    width:100%;padding:.95rem 1.1rem .95rem 2.85rem;
    font-family:var(--font-body);font-size:.98rem;font-weight:500;
    color:var(--text);background:var(--white);
    border:1.5px solid var(--border);border-radius:var(--r-full);
    box-shadow:var(--sh-md);outline:none;
    transition:border-color var(--t-fast),box-shadow var(--t-fast);
}
.search-input::placeholder{color:var(--gray-400);}
.search-wrapper .search-input:focus{
    border-color:var(--primary);
    box-shadow:var(--sh-lg),var(--sh-glow);
}
.search-input:focus + .search-icon,
.search-input-wrap:focus-within .search-icon{color:var(--primary);}

.suggestions-box{
    position:absolute;top:calc(100% + 8px);left:0;right:0;
    background:var(--white);
    border:1px solid var(--border);border-radius:var(--r-lg);
    box-shadow:var(--sh-lg);overflow:hidden;
    z-index:50;max-height:340px;overflow-y:auto;
}
.suggestion-item{
    display:flex;align-items:center;justify-content:space-between;gap:1rem;
    padding:.75rem 1.1rem;
    border-bottom:1px solid var(--border-soft);
    text-decoration:none;color:var(--text);
    transition:background var(--t-fast);
}
.suggestion-item:last-child{border-bottom:none;}
.suggestion-item:hover,
.suggestion-item.is-active{
    background:var(--indigo-50);text-decoration:none;
}
.suggestion-title{
    font-size:.93rem;font-weight:600;color:var(--text);
    flex:1;min-width:0;overflow:hidden;text-overflow:ellipsis;white-space:nowrap;
}
.suggestion-item:hover .suggestion-title,
.suggestion-item.is-active .suggestion-title{color:var(--primary);}
.suggestion-meta{
    flex-shrink:0;
    padding:.15rem .55rem;
    background:var(--gray-100);
    color:var(--text-muted);
    border-radius:var(--r-full);
    font-size:.75rem;font-weight:600;
    white-space:nowrap;
}

/* ═══════════════════════════════════════════════════════════════
   TABS
═══════════════════════════════════════════════════════════════ */
.calc-hub{margin-bottom:4rem;}

.tabs{display:grid;grid-template-columns:repeat(3,1fr);gap:.75rem;margin-bottom:1.75rem;}

.tab{
    display:flex;align-items:center;gap:.85rem;
    padding:1.1rem 1.25rem;background:var(--white);
    border:2px solid var(--border);border-radius:var(--r-lg);
    font-family:var(--font-body);text-align:left;cursor:pointer;
    transition:transform var(--t-fast),border-color var(--t-fast),
               box-shadow var(--t-norm),background var(--t-fast);
    box-shadow:var(--sh-xs);position:relative;overflow:hidden;
}
.tab:hover{border-color:var(--indigo-200);transform:translateY(-2px);box-shadow:var(--sh-md);}
.tab.active{background:linear-gradient(135deg,var(--white) 0%,var(--surface-alt) 100%);
            box-shadow:var(--sh-lg);}
.tab.active.tab-cgpa{border-color:var(--indigo-400);}
.tab.active.tab-sgpa{border-color:var(--teal-500);}
.tab.active.tab-pct{border-color:var(--amber-500);}

.tab-num{
    display:flex;align-items:center;justify-content:center;
    width:38px;height:38px;border-radius:var(--r-md);
    font-family:var(--font-display);font-weight:800;font-size:.9rem;
    flex-shrink:0;transition:background var(--t-fast),color var(--t-fast);
}
.tab-cgpa .tab-num{background:var(--cgpa-bg);color:var(--cgpa);}
.tab-sgpa .tab-num{background:var(--sgpa-bg);color:var(--sgpa);}
.tab-pct .tab-num{background:var(--pct-bg);color:var(--pct);}
.tab.active.tab-cgpa .tab-num{background:var(--cgpa);color:var(--white);}
.tab.active.tab-sgpa .tab-num{background:var(--sgpa);color:var(--white);}
.tab.active.tab-pct .tab-num{background:var(--pct);color:var(--white);}

.tab-text{display:flex;flex-direction:column;gap:.1rem;overflow:hidden;}
.tab-text strong{font-family:var(--font-display);font-size:.97rem;font-weight:700;
                 color:var(--gray-900);line-height:1.25;}
.tab-text small{font-size:.78rem;color:var(--text-muted);font-weight:500;}

.panel{display:none;animation:fadeUp .32s var(--ease-out);}
.panel.active{display:block;}
@keyframes fadeUp{from{opacity:0;transform:translateY(12px);}to{opacity:1;transform:translateY(0);}}

/* ═══════════════════════════════════════════════════════════════
   CALC CARD
═══════════════════════════════════════════════════════════════ */
.calc-card{
    background:var(--white);border:1px solid var(--border);
    border-radius:var(--r-2xl);padding:2rem;
    box-shadow:var(--sh-md);position:relative;overflow:hidden;
}
.calc-card::before{content:'';position:absolute;top:0;left:0;right:0;height:4px;}
.calc-card[data-accent="cgpa"]::before{background:linear-gradient(90deg,var(--indigo-400),var(--indigo-600),var(--sky-500));}
.calc-card[data-accent="sgpa"]::before{background:linear-gradient(90deg,var(--teal-500),var(--emerald-500),var(--teal-600));}
.calc-card[data-accent="pct"]::before{background:linear-gradient(90deg,var(--amber-400),var(--amber-500),var(--amber-600));}

.card-head{display:flex;align-items:flex-start;gap:1rem;margin-bottom:1.75rem;}
.card-head h3{margin:0;margin-bottom:.3rem;font-size:1.2rem;color:var(--gray-900);}
.card-head p{margin:0;font-size:.9rem;color:var(--text-muted);line-height:1.55;}
.card-head p strong{color:var(--text);font-weight:700;}

.card-icon{
    display:inline-flex;align-items:center;justify-content:center;
    min-width:56px;height:56px;padding:0 .75rem;
    border-radius:var(--r-lg);font-family:var(--font-display);
    font-size:.85rem;font-weight:800;letter-spacing:.02em;flex-shrink:0;
}
.icon-cgpa{background:var(--cgpa-bg);color:var(--cgpa);border:1.5px solid var(--cgpa-soft);}
.icon-sgpa{background:var(--sgpa-bg);color:var(--sgpa);border:1.5px solid var(--sgpa-soft);}
.icon-pct{background:var(--pct-bg);color:var(--pct);border:1.5px solid var(--pct-soft);font-size:1.4rem;}

.card-link{
    font-size:.86rem;font-weight:600;color:var(--primary);text-decoration:none;
    border-bottom:1.5px dashed var(--indigo-200);transition:color var(--t-fast);
}
.card-link:hover{color:var(--primary-hover);border-bottom-color:var(--primary);}

/* Form fields */
.field-row{display:grid;grid-template-columns:repeat(3,1fr);gap:1rem;margin-bottom:1.25rem;}
.field-row.two-col{grid-template-columns:repeat(2,1fr);}
.field{display:flex;flex-direction:column;gap:.4rem;}
.field label{
    font-family:var(--font-body);font-size:.78rem;font-weight:700;
    color:var(--gray-700);letter-spacing:.04em;text-transform:uppercase;
}

input[type="text"],input[type="number"],input[type="email"],input[type="search"],select{
    width:100%;padding:.7rem 1rem;
    font-family:var(--font-body);font-size:.95rem;font-weight:500;color:var(--text);
    background:var(--white);border:1.5px solid var(--border);
    border-radius:var(--r-md);outline:none;
    transition:border-color var(--t-fast),box-shadow var(--t-fast),background var(--t-fast);
    appearance:none;-webkit-appearance:none;
}
input[type="text"]:hover:not(:focus),input[type="number"]:hover:not(:focus),
select:hover:not(:focus){border-color:var(--gray-400);}
input[type="text"]:focus,input[type="number"]:focus,input[type="email"]:focus,
input[type="search"]:focus,select:focus{
    border-color:var(--primary);box-shadow:var(--sh-glow);background:var(--white);
}
input::placeholder{color:var(--gray-400);font-weight:500;}
input:disabled,select:disabled{background:var(--gray-100);color:var(--gray-400);cursor:not-allowed;}
select{
    cursor:pointer;
    background-image:url("data:image/svg+xml;utf8,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16' fill='none'%3E%3Cpath d='M4 6l4 4 4-4' stroke='%2364748b' stroke-width='1.6' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat:no-repeat;background-position:right .8rem center;background-size:18px;
    padding-right:2.5rem;
}

/* ── Buttons ──────────────────────────────────────────────── */
.btn-add{
    display:inline-flex;align-items:center;gap:.5rem;
    padding:.7rem 1.4rem;border:none;border-radius:var(--r-md);
    font-family:var(--font-body);font-size:.9rem;font-weight:700;
    color:var(--white);cursor:pointer;
    transition:transform var(--t-fast),box-shadow var(--t-fast),filter var(--t-fast);
    box-shadow:var(--sh-sm);
}
.btn-add svg{width:14px;height:14px;flex-shrink:0;}
.btn-add:hover{transform:translateY(-1px);box-shadow:var(--sh-md);filter:brightness(1.05);}
.btn-add:active{transform:translateY(0);}
.btn-add-cgpa{background:linear-gradient(135deg,var(--indigo-600),var(--indigo-500));}
.btn-add-sgpa{background:linear-gradient(135deg,var(--teal-600),var(--teal-500));}

.btn{
    display:inline-flex;align-items:center;justify-content:center;gap:.5rem;
    padding:.75rem 1.6rem;font-family:var(--font-body);
    font-size:.95rem;font-weight:700;
    border:2px solid transparent;border-radius:var(--r-md);
    cursor:pointer;text-decoration:none;
    transition:all var(--t-fast);box-shadow:var(--sh-sm);
}
.btn svg{width:16px;height:16px;flex-shrink:0;}
.btn-primary{color:var(--white);}
.btn-primary:hover{transform:translateY(-2px);box-shadow:var(--sh-lg);filter:brightness(1.05);}
.btn-primary:active{transform:translateY(0);}
.btn-cgpa{background:linear-gradient(135deg,var(--indigo-600),var(--indigo-500));}
.btn-sgpa{background:linear-gradient(135deg,var(--teal-600),var(--teal-500));}
.btn-pct{background:linear-gradient(135deg,var(--amber-600),var(--amber-500));}

.btn-ghost{background:var(--white);color:var(--gray-700);border-color:var(--border);}
.btn-ghost:hover{background:var(--gray-50);border-color:var(--gray-400);color:var(--gray-900);}

.actions{display:flex;flex-wrap:wrap;gap:.75rem;margin-top:1.25rem;}
.data-section{margin-top:1.5rem;animation:fadeUp .3s var(--ease-out);}

/* ── Tables ───────────────────────────────────────────────── */
.table-wrap{
    width:100%;overflow-x:auto;-webkit-overflow-scrolling:touch;
    border:1px solid var(--border);border-radius:var(--r-md);
    background:var(--white);box-shadow:var(--sh-xs);
}
table{width:100%;border-collapse:collapse;font-size:.92rem;background:transparent;}
thead tr{background:var(--gray-50);border-bottom:1.5px solid var(--border);}
thead th{
    padding:.85rem 1rem;text-align:left;color:var(--gray-700);
    font-family:var(--font-body);font-size:.78rem;font-weight:700;
    letter-spacing:.06em;text-transform:uppercase;white-space:nowrap;
}
tbody tr{border-bottom:1px solid var(--border-soft);transition:background var(--t-fast);}
tbody tr:last-child{border-bottom:none;}
tbody tr:hover{background:var(--surface-alt);}
tbody td{padding:.75rem 1rem;vertical-align:middle;color:var(--text);font-weight:500;}

tbody td button{
    display:inline-flex;align-items:center;gap:.3rem;
    padding:.3rem .7rem;background:var(--rose-50);color:var(--rose-600);
    border:1px solid var(--rose-100);border-radius:var(--r-sm);
    font-family:var(--font-body);font-size:.78rem;font-weight:700;
    cursor:pointer;transition:all var(--t-fast);
}
tbody td button:hover{background:var(--rose-500);border-color:var(--rose-500);color:var(--white);}

/* Result blocks */
.result-block{
    display:flex;align-items:center;justify-content:center;gap:.8rem;
    padding:1.4rem 1.75rem;border-radius:var(--r-xl);
    margin:1.5rem 0 .75rem;
    font-family:var(--font-display);
    font-size:clamp(1.4rem,3vw,1.85rem);font-weight:800;
    text-align:center;animation:resultPop .35s var(--ease-out);
    box-shadow:var(--sh-md);
}
@keyframes resultPop{from{opacity:0;transform:scale(.96);}to{opacity:1;transform:scale(1);}}

.result-cgpa{background:linear-gradient(135deg,var(--indigo-50),var(--sky-50));
             border:2px solid var(--indigo-200);color:var(--indigo-700);}
.result-sgpa{background:linear-gradient(135deg,var(--teal-50),var(--emerald-50));
             border:2px solid var(--teal-100);color:var(--teal-600);}
.result-pct{background:linear-gradient(135deg,var(--amber-50),#fef9c3);
            border:2px solid var(--amber-100);color:var(--amber-600);}

.breakdown-block{
    background:var(--white);border:1px solid var(--border);
    border-radius:var(--r-xl);padding:1.5rem 1.75rem;
    font-size:.92rem;line-height:1.8;color:var(--text-soft);
    margin-bottom:1.5rem;box-shadow:var(--sh-sm);
}
.breakdown-block strong{color:var(--gray-900);}
.breakdown-block .table-wrap{margin:1rem 0;}

/* ═══════════════════════════════════════════════════════════════
   PAGE HERO (university detail pages)
═══════════════════════════════════════════════════════════════ */
.page-hero{
    position:relative;overflow:hidden;
    padding:3rem 1.25rem 2.5rem;text-align:center;
    background:
        radial-gradient(ellipse 70% 50% at 50% 0%,var(--indigo-50) 0%,transparent 60%),
        radial-gradient(ellipse 50% 40% at 100% 100%,var(--sky-50) 0%,transparent 60%),
        var(--bg);
    border-bottom:1px solid var(--border-soft);
}
.page-hero-inner{position:relative;max-width:760px;margin:0 auto;}

.page-title{
    font-family:var(--font-display);
    font-size:clamp(1.8rem,4.5vw,3rem);font-weight:800;line-height:1.1;
    letter-spacing:-.03em;color:var(--gray-900);
    margin:.5rem 0 1rem;
}
.page-title-accent{
    background:linear-gradient(135deg,var(--indigo-600),var(--sky-500));
    -webkit-background-clip:text;background-clip:text;
    -webkit-text-fill-color:transparent;color:transparent;
    display:inline-block;
}
.page-subtitle{
    font-size:clamp(.95rem,1.5vw,1.08rem);color:var(--text-muted);
    margin-bottom:1.5rem;line-height:1.65;
}
.page-subtitle strong{color:var(--gray-900);font-weight:700;}

/* Breadcrumb */
.breadcrumb{margin-bottom:1rem;}
.breadcrumb ol{
    display:inline-flex;flex-wrap:wrap;justify-content:center;align-items:center;
    list-style:none !important;padding:0;margin:0;gap:.4rem;
    color:var(--text-muted);font-size:.85rem;
}
.breadcrumb li{
    margin:0;padding:0;
    display:inline-flex;align-items:center;gap:.4rem;
    list-style:none !important;
}
.breadcrumb li::marker{content:'';}
.breadcrumb li + li::before{
    content:'›';color:var(--gray-400);margin-right:.4rem;font-weight:600;
}
.breadcrumb a{
    color:var(--text-soft);text-decoration:none;font-weight:600;
    transition:color var(--t-fast);
}
.breadcrumb a:hover{color:var(--primary);text-decoration:underline;}
.breadcrumb li[aria-current="page"]{color:var(--primary);font-weight:700;}

/* Jump nav (anchors inside page) */
.jump-nav{
    display:flex;flex-wrap:wrap;justify-content:center;gap:.5rem;
    margin-top:1.5rem;padding:0;
    list-style:none;
}
.jump-nav a{
    display:inline-flex;align-items:center;gap:.35rem;
    padding:.45rem 1rem;background:var(--white);
    border:1px solid var(--border);border-radius:var(--r-full);
    font-size:.85rem;font-weight:600;color:var(--text-soft);
    text-decoration:none;line-height:1.4;
    box-shadow:var(--sh-xs);
    transition:transform var(--t-fast),border-color var(--t-fast),
               color var(--t-fast),box-shadow var(--t-fast);
}
.jump-nav a:hover{
    transform:translateY(-1px);
    border-color:var(--indigo-200);color:var(--primary);
    box-shadow:var(--sh-sm);text-decoration:none;
}

/* Reference / source citation note */
.reference-note{
    margin-top:2rem;padding:1rem 1.25rem;
    background:var(--surface-alt);
    border:1px solid var(--border);border-left:3px solid var(--indigo-500);
    border-radius:var(--r-md);
    font-size:.88rem;color:var(--text-soft);line-height:1.65;
}
.reference-note strong{color:var(--gray-900);}
.reference-note a{font-weight:600;}

/* ═══════════════════════════════════════════════════════════════
   HOW-TO CARDS (hook-message-*.php)
═══════════════════════════════════════════════════════════════ */
.how-to-card{
    background:linear-gradient(135deg,var(--indigo-50) 0%,var(--sky-50) 100%);
    border:1px solid var(--indigo-100);border-radius:var(--r-xl);
    padding:1.75rem;margin-top:1.5rem;
    box-shadow:var(--sh-sm);
}
.how-to-title{
    display:flex;align-items:center;gap:.55rem;
    font-family:var(--font-display);font-size:1.1rem;font-weight:700;
    color:var(--indigo-700);margin:0 0 1rem;
}
.how-to-title svg{width:22px;height:22px;flex-shrink:0;color:var(--indigo-600);}
.how-to-steps{
    list-style:none;padding:0;margin:0;
    counter-reset:howto;
}
.how-to-steps li{
    position:relative;padding:.4rem 0 .4rem 2.4rem;
    font-size:.95rem;color:var(--text);line-height:1.65;
    counter-increment:howto;margin-bottom:.3rem;
}
.how-to-steps li::before{
    content:counter(howto);
    position:absolute;left:0;top:.45rem;
    width:1.6rem;height:1.6rem;display:flex;align-items:center;justify-content:center;
    background:var(--white);border:1.5px solid var(--indigo-200);
    color:var(--indigo-700);
    border-radius:var(--r-full);font-family:var(--font-display);
    font-size:.78rem;font-weight:800;
    box-shadow:var(--sh-xs);
}
.how-to-note{
    display:flex;align-items:flex-start;gap:.65rem;
    margin-top:1rem;padding:.85rem 1rem;
    background:var(--white);border:1px solid var(--amber-100);
    border-left:3px solid var(--amber-400);
    border-radius:var(--r-md);
    font-size:.88rem;color:var(--text-soft);line-height:1.6;
}
.how-to-note svg{width:18px;height:18px;flex-shrink:0;color:var(--amber-500);margin-top:.1rem;}

/* ═══════════════════════════════════════════════════════════════
   FORMULA REFERENCE
═══════════════════════════════════════════════════════════════ */
.formula-feature{
    background:linear-gradient(135deg,var(--white) 0%,var(--indigo-50) 100%);
    border:1px solid var(--indigo-100);border-radius:var(--r-2xl);
    padding:2.5rem 2rem;text-align:center;
    box-shadow:var(--sh-md);margin-bottom:2rem;
    position:relative;overflow:hidden;
}
.formula-feature::before{
    content:'';position:absolute;top:-50%;left:-50%;width:200%;height:200%;
    background:radial-gradient(ellipse,rgba(99,102,241,.08) 0%,transparent 50%);
    pointer-events:none;
}
.formula-pill{
    display:inline-block;padding:.4rem 1.1rem;
    background:var(--white);border:1px solid var(--indigo-100);
    border-radius:var(--r-full);font-size:.78rem;font-weight:700;
    letter-spacing:.08em;text-transform:uppercase;
    color:var(--indigo-700);margin-bottom:1.5rem;
    box-shadow:var(--sh-xs);position:relative;
}
.formula-math{color:var(--gray-900);font-size:1.1rem;overflow-x:auto;position:relative;}
.formula-legend{
    display:grid;grid-template-columns:repeat(auto-fit,minmax(180px,1fr));
    gap:1rem;margin-top:1.75rem;padding-top:1.75rem;
    border-top:1px solid var(--indigo-100);position:relative;
}
.formula-legend > div{
    text-align:left;padding:.5rem .75rem;background:var(--white);
    border:1px solid var(--border);border-radius:var(--r-md);
}
.formula-legend strong{
    display:block;font-family:var(--font-display);font-size:1rem;
    color:var(--indigo-700);margin-bottom:.15rem;
}
.formula-legend span{font-size:.85rem;color:var(--text-muted);}
.formula-legend em{color:var(--gray-700);font-style:normal;font-weight:600;}

.info-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:1.25rem;margin-bottom:2.5rem;}
.info-card{
    background:var(--white);border:1px solid var(--border);
    border-radius:var(--r-xl);padding:1.75rem;box-shadow:var(--sh-sm);
    transition:transform var(--t-norm),box-shadow var(--t-norm),border-color var(--t-norm);
}
.info-card:hover{transform:translateY(-3px);box-shadow:var(--sh-lg);border-color:var(--indigo-200);}
.info-icon{
    display:inline-flex;align-items:center;justify-content:center;
    width:44px;height:44px;background:var(--indigo-50);color:var(--indigo-600);
    border-radius:var(--r-md);margin-bottom:1rem;
}
.info-icon svg{width:22px;height:22px;}
.info-card h3{margin-top:0;margin-bottom:.5rem;font-size:1.05rem;}
.info-card p{font-size:.9rem;margin-bottom:0;line-height:1.65;}

.grade-table-block{
    background:var(--white);border:1px solid var(--border);
    border-radius:var(--r-xl);padding:2rem;box-shadow:var(--sh-sm);
}
.block-head{margin-bottom:1.25rem;}
.block-head h3{margin:0;margin-bottom:.3rem;font-size:1.15rem;}
.block-head p{margin:0;font-size:.9rem;color:var(--text-muted);}

.grade-table .gbadge{
    display:inline-block;padding:.25rem .7rem;border-radius:var(--r-full);
    font-family:var(--font-display);font-size:.85rem;font-weight:700;
    min-width:56px;text-align:center;
}
.g-o{background:#fef3c7;color:#92400e;}
.g-a{background:var(--indigo-100);color:var(--indigo-700);}
.g-bp{background:var(--sky-100);color:#075985;}
.g-b{background:var(--teal-100);color:var(--teal-600);}
.g-cp{background:#d1fae5;color:var(--emerald-600);}
.g-c{background:var(--gray-200);color:var(--gray-700);}
.g-d{background:#fef3c7;color:#b45309;}
.g-f{background:var(--rose-100);color:var(--rose-600);}

/* Formula quick accordion */
.formula-quick{
    margin-top:1.5rem;background:var(--white);
    border:1px solid var(--border);border-radius:var(--r-xl);
    overflow:hidden;box-shadow:var(--sh-xs);
}
.formula-quick summary{
    padding:1.1rem 1.5rem;cursor:pointer;
    font-family:var(--font-display);font-size:1rem;font-weight:700;
    color:var(--gray-900);list-style:none;
    display:flex;justify-content:space-between;align-items:center;
    user-select:none;transition:background var(--t-fast);
}
.formula-quick summary::-webkit-details-marker{display:none;}
.formula-quick summary:hover{background:var(--surface-alt);}
.chev{width:18px;height:18px;color:var(--text-muted);transition:transform var(--t-norm);}
.formula-quick[open] .chev{transform:rotate(180deg);}

.formula-grid{
    display:grid;grid-template-columns:repeat(auto-fill,minmax(220px,1fr));
    gap:1rem;padding:1.5rem;border-top:1px solid var(--border-soft);
    background:var(--surface-alt);
}
.formula-card{
    background:var(--white);border:1px solid var(--border);
    border-radius:var(--r-md);padding:1.1rem;
    transition:transform var(--t-fast),box-shadow var(--t-fast);
}
.formula-card:hover{transform:translateY(-2px);box-shadow:var(--sh-md);}
.f-label{
    display:block;font-size:.72rem;font-weight:700;text-transform:uppercase;
    letter-spacing:.06em;color:var(--indigo-600);margin-bottom:.5rem;
}
.formula-card code{
    display:block;margin:.4rem 0;font-size:.83rem;
    background:var(--gray-50);padding:.5rem .7rem;border-radius:var(--r-sm);
}
.formula-card p{margin:.5rem 0 0;font-size:.85rem;color:var(--text-muted);}
.formula-card p strong{color:var(--emerald-600);font-weight:700;}

/* ═══════════════════════════════════════════════════════════════
   FAQ
═══════════════════════════════════════════════════════════════ */
.faq-list{display:flex;flex-direction:column;gap:.85rem;max-width:820px;margin:0 auto;}
.faq-item{
    background:var(--white);border:1px solid var(--border);
    border-radius:var(--r-xl);overflow:hidden;
    box-shadow:var(--sh-xs);
    transition:box-shadow var(--t-norm),border-color var(--t-norm);
}
.faq-item:hover,.faq-item[open]{box-shadow:var(--sh-md);border-color:var(--indigo-200);}
.faq-q{
    display:flex;justify-content:space-between;align-items:center;gap:1rem;
    padding:1.15rem 1.5rem;cursor:pointer;
    font-family:var(--font-display);font-size:1rem;font-weight:700;
    color:var(--gray-900);list-style:none;user-select:none;
    transition:background var(--t-fast);
}
.faq-q::-webkit-details-marker{display:none;}
.faq-q:hover{background:var(--surface-alt);}
.faq-chev{width:18px;height:18px;color:var(--text-muted);flex-shrink:0;
          transition:transform var(--t-norm);}
.faq-item[open] .faq-chev{transform:rotate(180deg);color:var(--primary);}
.faq-a{
    padding:0 1.5rem 1.4rem;background:var(--white);
    font-size:.93rem;line-height:1.75;color:var(--text-soft);
    border-top:1px solid var(--border-soft);padding-top:1.1rem;
}
.faq-a p{margin-bottom:.65rem;}
.faq-a p:last-child{margin-bottom:0;}

/* ═══════════════════════════════════════════════════════════════
   SOCIAL SHARE (social-share.php)
═══════════════════════════════════════════════════════════════ */
.social-share{
    display:flex;flex-wrap:wrap;align-items:center;gap:.6rem;
    padding:1.1rem 1.4rem;
    background:var(--white);border:1px solid var(--border);
    border-radius:var(--r-xl);
    box-shadow:var(--sh-sm);margin:2.5rem 0;
}
.share-label{
    display:inline-flex;align-items:center;gap:.45rem;
    font-family:var(--font-display);font-size:.92rem;font-weight:700;
    color:var(--gray-900);margin-right:.5rem;
}
.share-label svg{width:18px;height:18px;color:var(--indigo-600);}
.share-btn{
    display:inline-flex;align-items:center;justify-content:center;
    width:40px;height:40px;border-radius:var(--r-full);
    background:var(--gray-50);border:1px solid var(--border);
    text-decoration:none;cursor:pointer;color:var(--gray-700);
    transition:transform var(--t-fast),background var(--t-fast),
               border-color var(--t-fast),box-shadow var(--t-fast);
}
.share-btn:hover{transform:translateY(-2px);box-shadow:var(--sh-md);}
.share-btn img{width:20px;height:20px;}
.share-whatsapp:hover{background:#25D36615;border-color:#25D366;}
.share-telegram:hover{background:#0088cc15;border-color:#0088cc;}
.share-facebook:hover{background:#1877F215;border-color:#1877F2;}
.share-copy:hover{background:var(--indigo-50);border-color:var(--indigo-200);color:var(--primary);}
.share-copy svg{width:18px;height:18px;}
.share-copy.copied{background:var(--emerald-50);border-color:var(--emerald-500);color:var(--emerald-600);}

/* ═══════════════════════════════════════════════════════════════
   UNIVERSITY DIRECTORY (used on /in/, /ca/ hub pages)
═══════════════════════════════════════════════════════════════ */
.uni-grid{
    display:grid;
    grid-template-columns:repeat(auto-fill,minmax(280px,1fr));
    gap:1rem;
}
.uni-grid-featured{
    grid-template-columns:repeat(auto-fill,minmax(320px,1fr));
    gap:1.25rem;
}
.uni-grid-compact{
    grid-template-columns:repeat(auto-fill,minmax(240px,1fr));
    gap:.85rem;
}

.uni-card{
    position:relative;display:flex;align-items:flex-start;gap:.85rem;
    padding:1.1rem 1.25rem;
    background:var(--white);
    border:1px solid var(--border);border-radius:var(--r-lg);
    text-decoration:none;color:inherit;
    box-shadow:var(--sh-xs);
    transition:transform var(--t-fast),border-color var(--t-fast),
               box-shadow var(--t-fast),background var(--t-fast);
    overflow:hidden;
}
.uni-card::before{
    content:'';position:absolute;left:0;top:0;bottom:0;width:3px;
    background:linear-gradient(180deg,var(--indigo-500),var(--sky-500));
    opacity:0;transition:opacity var(--t-fast);
}
.uni-card:hover{
    transform:translateY(-2px);
    border-color:var(--indigo-200);
    box-shadow:var(--sh-md);
    text-decoration:none;
}
.uni-card:hover::before{opacity:1;}

.uni-card-featured{
    padding:1.4rem 1.5rem;
}
.uni-card-featured .uni-card-name{font-size:1.15rem;}

.uni-card-icon{
    flex-shrink:0;
    width:54px;height:54px;border-radius:var(--r-md);
    display:flex;align-items:center;justify-content:center;
    background:linear-gradient(135deg,var(--indigo-50),var(--sky-50));
    color:var(--indigo-700);
    font-family:var(--font-display);font-weight:800;font-size:.95rem;
    letter-spacing:-.02em;
    border:1.5px solid var(--indigo-100);
}

.uni-card-body{flex:1;min-width:0;}
.uni-card-name{
    margin:0 0 .2rem;
    font-family:var(--font-display);
    font-size:1.02rem;font-weight:700;
    color:var(--gray-900);
    line-height:1.25;
}
.uni-card-full{
    margin:0 0 .55rem;
    font-size:.83rem;color:var(--text-muted);
    line-height:1.45;
    overflow:hidden;text-overflow:ellipsis;
    display:-webkit-box;-webkit-line-clamp:2;-webkit-box-orient:vertical;
}
.uni-card-region{
    display:inline-flex;align-items:center;gap:.3rem;
    font-size:.78rem;font-weight:600;color:var(--indigo-600);
    background:var(--indigo-50);
    padding:.2rem .55rem;border-radius:var(--r-full);
}
.uni-card-region svg{flex-shrink:0;color:var(--indigo-500);}

.uni-card-arrow{
    position:absolute;top:1.1rem;right:1.25rem;
    font-size:1.15rem;color:var(--gray-300);
    transition:transform var(--t-fast),color var(--t-fast);
}
.uni-card:hover .uni-card-arrow{
    transform:translateX(3px);color:var(--primary);
}

@media (max-width:480px){
    .uni-grid,.uni-grid-featured,.uni-grid-compact{grid-template-columns:1fr;}
    .uni-card{padding:.9rem 1rem;}
    .uni-card-featured{padding:1.1rem 1.2rem;}
    .uni-card-icon{width:44px;height:44px;font-size:.82rem;}
    .uni-card-arrow{display:none;}
}

/* ═══════════════════════════════════════════════════════════════
   CONTACT PAGE (form, info cards, success/error messages)
═══════════════════════════════════════════════════════════════ */
.contact-grid{
    display:grid;
    grid-template-columns:1fr 1.6fr;
    gap:2rem;
    align-items:start;
}
@media (max-width:860px){
    .contact-grid{grid-template-columns:1fr;gap:1.5rem;}
}

.contact-info{
    display:flex;flex-direction:column;gap:1rem;
}
.contact-info .info-card{
    padding:1.25rem 1.4rem;
}
.contact-info .info-card h3{
    margin-top:0;margin-bottom:.4rem;font-size:1.02rem;
}
.contact-info .info-card p{
    font-size:.9rem;margin-bottom:.4rem;line-height:1.55;
}
.contact-info .info-card p:last-child{margin-bottom:0;}
.contact-mail-link{
    display:inline-block;
    font-weight:700;color:var(--primary);
    background:var(--indigo-50);
    padding:.4rem .85rem;border-radius:var(--r-full);
    border:1px solid var(--indigo-100);
    margin-top:.25rem;
    transition:background var(--t-fast),border-color var(--t-fast);
}
.contact-mail-link:hover{
    background:var(--indigo-100);border-color:var(--indigo-200);
    text-decoration:none;
}

.contact-form-wrap{display:flex;flex-direction:column;gap:1rem;}

/* ── Honeypot — invisible to humans, visible to bots ── */
.hp-field{
    position:absolute !important;
    left:-9999px !important;
    top:-9999px !important;
    width:1px;height:1px;
    overflow:hidden;
    visibility:hidden;
}

/* ── Field hint (below textareas) ── */
.field-hint{
    display:block;margin-top:.35rem;
    font-size:.78rem;color:var(--text-muted);
}

/* ── Textareas (extend input styling) ── */
textarea{
    width:100%;padding:.7rem 1rem;
    font-family:var(--font-body);font-size:.95rem;font-weight:500;color:var(--text);
    background:var(--white);border:1.5px solid var(--border);
    border-radius:var(--r-md);outline:none;resize:vertical;min-height:120px;
    transition:border-color var(--t-fast),box-shadow var(--t-fast);
}
textarea:hover:not(:focus){border-color:var(--gray-400);}
textarea:focus{
    border-color:var(--primary);box-shadow:var(--sh-glow);
}
textarea::placeholder{color:var(--gray-400);}

/* ── Privacy note under form ── */
.form-privacy{
    display:flex;align-items:center;gap:.45rem;
    margin:1.25rem 0 0;
    padding:.75rem 1rem;
    background:var(--surface-alt);
    border:1px solid var(--border-soft);
    border-radius:var(--r-md);
    font-size:.82rem;color:var(--text-muted);line-height:1.5;
}
.form-privacy svg{flex-shrink:0;color:var(--emerald-500);}

/* ── Success / error message banners ── */
.form-msg{
    display:flex;align-items:center;gap:.7rem;
    padding:1rem 1.25rem;
    border-radius:var(--r-lg);
    font-size:.94rem;font-weight:500;line-height:1.5;
    animation:fadeUp .3s var(--ease-out);
    border:1px solid;
}
.form-msg svg{flex-shrink:0;width:22px;height:22px;}
.form-msg-success{
    background:var(--emerald-50);
    color:var(--emerald-600);
    border-color:var(--emerald-100);
}
.form-msg-error{
    background:var(--rose-50);
    color:var(--rose-600);
    border-color:var(--rose-100);
}

@media (max-width:480px){
    .contact-info .info-card{padding:1rem 1.1rem;}
    .form-msg{padding:.85rem 1rem;font-size:.88rem;}
}

/* ═══════════════════════════════════════════════════════════════
   PWA INSTALL MODAL
═══════════════════════════════════════════════════════════════ */
.install-modal-overlay{
    position:fixed;inset:0;z-index:200;
    display:flex;align-items:center;justify-content:center;
    padding:1rem;
    background:rgba(15,23,42,.55);
    backdrop-filter:blur(6px);
    -webkit-backdrop-filter:blur(6px);
    opacity:0;visibility:hidden;
    transition:opacity var(--t-norm),visibility 0s linear var(--t-norm);
}
.install-modal-overlay.open{
    opacity:1;visibility:visible;
    transition:opacity var(--t-norm),visibility 0s linear 0s;
}
.install-modal{
    position:relative;
    width:100%;max-width:420px;
    background:var(--white);
    border-radius:var(--r-2xl);
    padding:2.25rem 1.75rem 1.75rem;
    box-shadow:var(--sh-xl);
    text-align:center;
    transform:translateY(20px) scale(.96);
    transition:transform var(--t-norm) var(--ease-out);
}
.install-modal-overlay.open .install-modal{transform:translateY(0) scale(1);}
.install-modal-emoji{font-size:3rem;line-height:1;margin-bottom:.75rem;}
.install-modal h3{margin-top:0;margin-bottom:.6rem;font-size:1.4rem;color:var(--gray-900);}
.install-modal p{
    color:var(--text-soft);font-size:.95rem;line-height:1.65;
    margin-bottom:1.5rem;
}
.install-modal p strong{color:var(--gray-900);}
.install-modal .btn{margin:0 auto;}
.install-modal-close{
    position:absolute;top:.85rem;right:.85rem;
    width:32px;height:32px;border-radius:var(--r-full);
    background:var(--gray-100);border:none;color:var(--gray-600);
    cursor:pointer;display:flex;align-items:center;justify-content:center;
    transition:background var(--t-fast),color var(--t-fast);
}
.install-modal-close:hover{background:var(--gray-200);color:var(--gray-900);}
.install-modal-close svg{width:14px;height:14px;}
.install-modal-ok{width:100%;}

/* ═══════════════════════════════════════════════════════════════
   SCROLL-TO-TOP
═══════════════════════════════════════════════════════════════ */
.scroll-top{
    position:fixed;bottom:1.5rem;right:1.5rem;z-index:90;
    width:46px;height:46px;border-radius:var(--r-full);
    border:1px solid var(--border);background:var(--white);
    color:var(--primary);cursor:pointer;
    display:flex;align-items:center;justify-content:center;
    box-shadow:var(--sh-lg);
    transition:opacity var(--t-norm),transform var(--t-norm),
               background var(--t-fast),color var(--t-fast);
    opacity:0;
}
.scroll-top:not([hidden]){opacity:1;}
.scroll-top:hover{background:var(--primary);color:var(--white);
                  transform:translateY(-3px);box-shadow:var(--sh-xl);}
.scroll-top svg{width:20px;height:20px;}

/* ═══════════════════════════════════════════════════════════════
   FOOTER
═══════════════════════════════════════════════════════════════ */
.site-footer{
    background:var(--white);border-top:1px solid var(--border);
    color:var(--text-muted);padding:3rem 1.25rem 1.5rem;
    font-size:.92rem;margin-top:2rem;
}

.footer-grid{
    max-width:var(--max-w);margin:0 auto;
    display:grid;grid-template-columns:1.6fr 1fr 1fr 1.2fr;gap:2.5rem;
    padding-bottom:2.5rem;
}
.footer-col h3{
    font-family:var(--font-display);font-size:.88rem;font-weight:700;
    color:var(--gray-900);text-transform:uppercase;letter-spacing:.06em;
    margin:0 0 1rem;
}
.footer-col ul{list-style:none;padding:0;margin:0;}
.footer-col li{margin-bottom:.5rem;}
.footer-col a{
    font-size:.92rem;font-weight:500;color:var(--text-soft);
    text-decoration:none;transition:color var(--t-fast);
}
.footer-col a:hover{color:var(--primary);text-decoration:underline;}

.footer-brand-col p{
    color:var(--text-muted);font-size:.92rem;line-height:1.65;
    margin:0;max-width:340px;
}

.footer-bottom{
    max-width:var(--max-w);margin:0 auto;
    padding-top:1.5rem;border-top:1px solid var(--border);
    display:flex;flex-wrap:wrap;justify-content:space-between;align-items:center;gap:1rem;
}
.footer-bottom p{margin:0;font-size:.85rem;color:var(--text-muted);}
.footer-tagline{font-style:italic;}

/* ═══════════════════════════════════════════════════════════════
   ACCESSIBILITY
═══════════════════════════════════════════════════════════════ */
:focus-visible{outline:3px solid var(--primary);outline-offset:2px;border-radius:var(--r-sm);}
.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;
         clip:rect(0,0,0,0);white-space:nowrap;border:0;}
@media (prefers-reduced-motion:reduce){
    *,*::before,*::after{
        animation-duration:.01ms!important;animation-iteration-count:1!important;
        transition-duration:.01ms!important;scroll-behavior:auto!important;
    }
    .btn-install{animation:none!important;}
}

/* ═══════════════════════════════════════════════════════════════
   RESPONSIVE
═══════════════════════════════════════════════════════════════ */
@media (max-width:1024px){
    .info-grid{grid-template-columns:repeat(2,1fr);}
    .footer-grid{grid-template-columns:1fr 1fr;gap:2rem;}
}

@media (max-width:860px){
    .tabs{grid-template-columns:1fr;}
    .info-grid{grid-template-columns:1fr;}
    .field-row,.field-row.two-col{grid-template-columns:1fr;}
}

@media (max-width:768px){
    .nav-toggle{display:flex;align-items:center;justify-content:center;}

    /* Mobile dropdown nav */
    .primary-nav{
        position:absolute;top:100%;left:0;right:0;
        flex-direction:column;align-items:stretch;gap:.5rem;
        background:var(--white);
        border-top:1px solid var(--border);border-bottom:1px solid var(--border);
        padding:.85rem;box-shadow:var(--sh-md);
        max-height:0;overflow:hidden;opacity:0;visibility:hidden;
        transition:max-height var(--t-slow),opacity var(--t-norm),
                   visibility 0s linear var(--t-slow);
        margin-left:0;
    }
    .nav-open .primary-nav{
        max-height:600px;opacity:1;visibility:visible;
        transition:max-height var(--t-slow),opacity var(--t-norm),visibility 0s linear 0s;
    }
    .primary-nav ul{
        flex-direction:column;align-items:stretch;width:100%;gap:.25rem;
    }
    .primary-nav a{
        display:block;padding:.75rem 1rem;border-radius:var(--r-md);
    }
    .btn-install{
        margin-left:auto;
        padding:.45rem .7rem;
        font-size:.78rem;
    }

    .hero{padding:3rem 1rem;}
    .calc-card{padding:1.5rem;}
    .formula-feature{padding:1.75rem 1.25rem;}
    .grade-table-block{padding:1.25rem;}
    .actions{flex-direction:column;}
    .btn,.btn-primary,.btn-ghost{width:100%;}
    .page-body{padding:2rem 1rem 4rem;}

    .footer-grid{grid-template-columns:1fr;gap:1.75rem;text-align:left;padding-bottom:1.75rem;}
    .footer-bottom{flex-direction:column;text-align:center;}
}

@media (max-width:480px){
    .header-inner{padding:.7rem 1rem;}
    .brand{font-size:1.2rem;}
    .hero{padding:2.5rem 1rem;}
    .hero-title{font-size:2.1rem;}
    .hero-features{gap:.5rem;}
    .hero-features li{padding:.3rem .7rem;font-size:.78rem;}
    .page-hero{padding:2rem 1rem 1.75rem;}
    .page-title{font-size:1.7rem;}
    .jump-nav{gap:.35rem;}
    .jump-nav a{font-size:.78rem;padding:.35rem .75rem;}
    .calc-card{padding:1.25rem;border-radius:var(--r-xl);}
    .card-head{gap:.75rem;}
    .card-icon{min-width:48px;height:48px;font-size:.78rem;}
    .icon-pct{font-size:1.2rem;}
    .tab{padding:.85rem 1rem;}
    .tab-num{width:32px;height:32px;font-size:.8rem;}
    .tab-text strong{font-size:.9rem;}
    .tab-text small{font-size:.74rem;}
    thead th,tbody td{padding:.6rem .7rem;font-size:.82rem;}
    .formula-grid{grid-template-columns:1fr;padding:1rem;}
    .formula-feature{padding:1.5rem 1rem;}
    .scroll-top{bottom:1rem;right:1rem;width:42px;height:42px;}
    .social-share{padding:.85rem 1rem;}
    .how-to-card{padding:1.25rem;}
}

@media (min-width:1280px){
    .page-body{padding:4rem 2rem 6rem;}
}

/* ── Print ─────────────────────────────────────────────────── */
@media print{
    .site-header,.hero,.scroll-top,.nav-toggle,
    .btn,.btn-add,.actions,.tabs,.formula-quick,.social-share{display:none!important;}
    body{background:white;color:black;}
    .calc-card,.info-card,.grade-table-block,.breakdown-block{
        box-shadow:none!important;border:1px solid #ccc!important;page-break-inside:avoid;
    }
    .panel{display:block!important;}
    a{color:inherit!important;text-decoration:underline;}
}