/* =====================================================================
   KITE — Kaveri Institute of Technology & Engineering
   Design tokens
   Color: deep Western-Ghats forest green + sandstone terracotta +
          a single marigold/saffron accent, on warm ivory paper.
   Type:  Fraunces (display serif, heritage + craft) for headings,
          Work Sans (grounded, technical) for body & UI.
   ===================================================================== */

:root {
    /* Palette */
    --ink:        #14231C;
    --forest:     #0B3D2E;
    --forest-2:   #155843;
    --terracotta: #C77B32;
    --terracotta-deep: #8A4B23;
    --saffron:    #E8A33D;
    --stone:      #6B7A70;
    --paper:      #F7F5EF;
    --paper-2:    #EFEBE0;
    --white:      #FFFFFF;
    --line:       rgba(20, 35, 28, 0.12);

    /* Type */
    --font-display: 'Fraunces', 'Iowan Old Style', Georgia, serif;
    --font-body: 'Work Sans', system-ui, -apple-system, sans-serif;

    /* Rhythm */
    --gutter: clamp(1.25rem, 4vw, 3rem);
    --radius-s: 6px;
    --radius-m: 14px;
    --radius-l: 28px;
    --shadow-soft: 0 12px 32px rgba(11, 61, 46, 0.12);
    --ease: cubic-bezier(.22, .61, .36, 1);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}

body {
    margin: 0;
    background: var(--paper);
    color: var(--ink);
    font-family: var(--font-body);
    font-size: 1rem;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

img, svg { max-width: 100%; display: block; }
a { color: inherit; }
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 600; margin: 0 0 0.5em; color: var(--ink); }
h1 { font-size: clamp(2.4rem, 5vw, 4.4rem); line-height: 1.03; letter-spacing: -0.02em; }
h2 { font-size: clamp(1.8rem, 3.4vw, 2.8rem); line-height: 1.1; letter-spacing: -0.015em; }
h3 { font-size: clamp(1.25rem, 2vw, 1.6rem); line-height: 1.2; }
p { margin: 0 0 1em; max-width: 66ch; }
.lede { font-size: 1.2rem; color: var(--stone); max-width: 52ch; }

.container { max-width: 1240px; margin-inline: auto; padding-inline: var(--gutter); }
.section { padding-block: clamp(3rem, 7vw, 6rem); }
.section--tight { padding-block: clamp(2rem, 4vw, 3.5rem); }
.section--forest { background: var(--forest); color: var(--paper); }
.section--forest h1, .section--forest h2, .section--forest h3 { color: var(--white); }
.section--paper-2 { background: var(--paper-2); }
.section--white { background: var(--white); }

.eyebrow { color: var(--terracotta-deep); font-weight: 600; font-size: 0.85rem; margin-bottom: 0.6em; display: block; }
.section--forest .eyebrow { color: var(--saffron); }

.btn {
    display: inline-flex; align-items: center; gap: 0.5em;
    padding: 0.85em 1.6em; border-radius: 999px; border: 1px solid transparent;
    font-weight: 600; font-size: 0.98rem; text-decoration: none; cursor: pointer;
    transition: transform 120ms var(--ease), background 160ms var(--ease), box-shadow 160ms var(--ease);
}
.btn:active { transform: scale(0.97); }
.btn-primary { background: var(--saffron); color: var(--ink); }
.btn-primary:hover { box-shadow: 0 8px 22px rgba(232, 163, 61, 0.45); }
.btn-outline { background: transparent; color: inherit; border-color: currentColor; }
.btn-outline:hover { background: rgba(255,255,255,0.08); }
.section--white .btn-outline:hover, .section--paper-2 .btn-outline:hover { background: rgba(20,35,28,0.06); }
.btn-ghost { background: none; padding: 0.4em 0; border-radius: 0; font-weight: 600; border-bottom: 2px solid var(--terracotta); }

/* ---------------------------------------------------------------- header */
.site-header {
    position: sticky; top: 0; z-index: 100;
    background: rgba(247, 245, 239, 0.86);
    backdrop-filter: blur(14px) saturate(160%);
    border-bottom: 1px solid var(--line);
}
.utility-bar {
    background: var(--ink); color: var(--paper-2); font-size: 0.82rem;
}
.utility-bar .container { display: flex; justify-content: space-between; align-items: center; padding-block: 0.45rem; gap: 1rem; flex-wrap: wrap; }
.utility-bar a { text-decoration: none; opacity: 0.88; }
.utility-bar a:hover { opacity: 1; text-decoration: underline; }
.utility-bar__links { display: flex; gap: 1.1rem; flex-wrap: wrap; }
.utility-bar__contact { display: flex; gap: 1.2rem; flex-wrap: wrap; opacity: 0.9; }

.nav-row { display: flex; align-items: center; justify-content: space-between; padding-block: 0.85rem; gap: 1.5rem; }
.brand { display: flex; align-items: center; gap: 0.7rem; text-decoration: none; }
.brand__mark {
    width: 44px; height: 44px; border-radius: 12px; background: var(--forest);
    display: flex; align-items: center; justify-content: center; flex-shrink: 0;
}
.brand__mark svg { width: 26px; height: 26px; }
.brand__text { line-height: 1.15; }
.brand__name { font-family: var(--font-display); font-weight: 700; font-size: 1.25rem; color: var(--ink); }
.brand__sub { font-size: 0.72rem; color: var(--stone); display: block; }

.main-nav { display: flex; align-items: center; gap: 0.3rem; }
.main-nav ul { list-style: none; display: flex; gap: 0.1rem; margin: 0; padding: 0; }
.main-nav > ul > li { position: relative; }
.main-nav a.top-link {
    display: block; padding: 0.6rem 0.85rem; border-radius: 999px; text-decoration: none;
    font-size: 0.95rem; font-weight: 500; color: var(--ink); transition: background 140ms var(--ease), color 140ms var(--ease);
    white-space: nowrap;
}
.main-nav a.top-link:hover, .main-nav a.top-link.is-active { background: var(--forest); color: var(--white); }
.main-nav .has-children:hover .dropdown,
.main-nav .has-children:focus-within .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown {
    position: absolute; top: 100%; left: 0; min-width: 240px; background: var(--white);
    border-radius: var(--radius-m); box-shadow: var(--shadow-soft); padding: 0.5rem;
    opacity: 0; visibility: hidden; transform: translateY(6px);
    transition: opacity 160ms var(--ease), transform 160ms var(--ease), visibility 160ms;
    list-style: none; margin: 0.4rem 0 0;
}
.dropdown a { display: block; padding: 0.55rem 0.8rem; border-radius: var(--radius-s); text-decoration: none; font-size: 0.9rem; }
.dropdown a:hover { background: var(--paper-2); }

.nav-toggle { display: none; }
.menu-cta { display: flex; align-items: center; gap: 0.6rem; }

@media (max-width: 980px) {
    .main-nav { position: fixed; inset: 0 0 0 auto; width: min(84vw, 360px); background: var(--white);
        transform: translateX(100%); transition: transform 260ms var(--ease); padding: 5.5rem 1.5rem 2rem;
        overflow-y: auto; box-shadow: -12px 0 32px rgba(0,0,0,0.18); }
    .main-nav.is-open { transform: translateX(0); }
    .main-nav ul { flex-direction: column; width: 100%; }
    .main-nav a.top-link { padding: 0.85rem 0.5rem; }
    .dropdown { position: static; opacity: 1; visibility: visible; transform: none; box-shadow: none; display: none; padding-left: 0.75rem; }
    .has-children.is-expanded .dropdown { display: block; }
    .nav-toggle {
        display: flex; flex-direction: column; gap: 5px; width: 42px; height: 42px; align-items: center; justify-content: center;
        border: 1px solid var(--line); border-radius: 10px; background: var(--white); cursor: pointer; z-index: 110;
    }
    .nav-toggle span { width: 20px; height: 2px; background: var(--ink); display: block; transition: transform 200ms var(--ease), opacity 200ms var(--ease); }
    .nav-toggle.is-active span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
    .nav-toggle.is-active span:nth-child(2) { opacity: 0; }
    .nav-toggle.is-active span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
    .nav-scrim { position: fixed; inset: 0; background: rgba(20,35,28,0.35); opacity: 0; visibility: hidden; transition: opacity 200ms var(--ease); z-index: 99; }
    .nav-scrim.is-visible { opacity: 1; visibility: visible; }
    .menu-cta .btn-primary { display: none; }
}

/* ---------------------------------------------------------------- hero */
.hero { position: relative; overflow: hidden; background: var(--ink); color: var(--white); min-height: min(88vh, 780px); display: flex; align-items: flex-end; }
.hero__media { position: absolute; inset: 0; }
.hero__media video, .hero__media .hero__fallback { position: absolute; inset: 0; width: 100%; height: 100%; object-fit: cover; }
.hero__fallback { background:
    radial-gradient(circle at 15% 20%, rgba(232,163,61,0.35), transparent 45%),
    radial-gradient(circle at 85% 75%, rgba(199,123,50,0.35), transparent 50%),
    linear-gradient(160deg, #0B3D2E, #14231C 60%, #0B3D2E);
    background-size: 200% 200%;
    animation: driftGradient 18s ease-in-out infinite;
}
@keyframes driftGradient { 0%,100% { background-position: 0% 30%; } 50% { background-position: 100% 70%; } }
.hero__scrim { position: absolute; inset: 0; background: linear-gradient(0deg, rgba(11,17,14,0.92) 5%, rgba(11,17,14,0.35) 55%, rgba(11,17,14,0.55) 100%); }
.hero__content { position: relative; z-index: 2; padding-block: clamp(3rem, 10vw, 6rem); width: 100%; }
.hero__badges { display: flex; gap: 0.6rem; flex-wrap: wrap; margin-bottom: 1.4rem; }
.hero__badge { font-size: 0.78rem; padding: 0.35em 0.9em; border-radius: 999px; border: 1px solid rgba(255,255,255,0.35); color: var(--paper); }
.hero h1 { color: var(--white); max-width: 16ch; }
.hero__lede { color: rgba(247,245,239,0.85); font-size: 1.15rem; max-width: 46ch; margin-top: 0.8rem; }
.hero__actions { display: flex; gap: 1rem; margin-top: 2rem; flex-wrap: wrap; }
.hero__stats { display: grid; grid-template-columns: repeat(4, auto); gap: clamp(1.4rem, 4vw, 3.2rem); margin-top: 3rem; padding-top: 2rem; border-top: 1px solid rgba(255,255,255,0.18); }
.hero__stat b { display: block; font-family: var(--font-display); font-size: clamp(1.6rem, 3vw, 2.2rem); color: var(--saffron); }
.hero__stat span { font-size: 0.82rem; color: rgba(247,245,239,0.75); }
@media (max-width: 720px) { .hero__stats { grid-template-columns: repeat(2, auto); } }

/* ---------------------------------------------------------------- cards */
.grid { display: grid; gap: clamp(1.2rem, 2.5vw, 2rem); }
.grid--2 { grid-template-columns: repeat(2, 1fr); }
.grid--3 { grid-template-columns: repeat(3, 1fr); }
.grid--4 { grid-template-columns: repeat(4, 1fr); }
@media (max-width: 980px) { .grid--3, .grid--4 { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 620px) { .grid--2, .grid--3, .grid--4 { grid-template-columns: 1fr; } }

.card { background: var(--white); border-radius: var(--radius-m); padding: 1.7rem; border: 1px solid var(--line); transition: transform 200ms var(--ease), box-shadow 200ms var(--ease); }
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-soft); }
.card h3 { margin-bottom: 0.4rem; }
.card .tag { display: inline-block; font-size: 0.75rem; font-weight: 600; color: var(--forest); background: rgba(11,61,46,0.08); padding: 0.25em 0.7em; border-radius: 999px; margin-bottom: 0.8rem; }

.dept-card { display: flex; flex-direction: column; height: 100%; }
.dept-card__photo { border-radius: var(--radius-m); overflow: hidden; margin-bottom: 1.1rem; aspect-ratio: 4/3; }
.dept-card__meta { display: flex; gap: 0.6rem; flex-wrap: wrap; margin-top: 0.6rem; font-size: 0.8rem; color: var(--stone); }
.dept-card__meta span { background: var(--paper-2); padding: 0.25em 0.7em; border-radius: 999px; }

.person-card { text-align: left; }
.person-card__photo { border-radius: var(--radius-m); overflow: hidden; aspect-ratio: 1/1; margin-bottom: 0.9rem; }
.person-card__name { font-family: var(--font-display); font-weight: 600; font-size: 1.05rem; }
.person-card__role { color: var(--stone); font-size: 0.88rem; margin-bottom: 0.6rem; }

.stat-strip { display: grid; grid-template-columns: repeat(4, 1fr); gap: 1.5rem; text-align: center; }
.stat-strip b { display: block; font-family: var(--font-display); font-size: clamp(1.8rem, 3.5vw, 2.6rem); color: var(--terracotta); }
.stat-strip span { color: var(--stone); font-size: 0.85rem; }
@media (max-width: 720px) { .stat-strip { grid-template-columns: repeat(2, 1fr); } }

.timeline { border-left: 2px solid var(--line); padding-left: 1.6rem; display: flex; flex-direction: column; gap: 1.7rem; }
.timeline__item { position: relative; }
.timeline__item::before { content: ''; position: absolute; left: -1.86rem; top: 0.3rem; width: 10px; height: 10px; border-radius: 50%; background: var(--terracotta); }
.timeline__date { font-size: 0.8rem; color: var(--stone); font-weight: 600; }

.accordion-item { border-bottom: 1px solid var(--line); }
.accordion-item summary { cursor: pointer; padding: 1.1rem 0; font-weight: 600; font-family: var(--font-display); font-size: 1.05rem; list-style: none; display: flex; justify-content: space-between; align-items: center; gap: 1rem; }
.accordion-item summary::-webkit-details-marker { display: none; }
.accordion-item summary::after { content: '+'; font-size: 1.4rem; color: var(--terracotta); transition: transform 200ms var(--ease); flex-shrink: 0; }
.accordion-item[open] summary::after { transform: rotate(45deg); }
.accordion-item p { padding-bottom: 1.1rem; color: var(--stone); }

.quote-card { background: var(--white); border-radius: var(--radius-m); padding: 1.8rem; border-left: 4px solid var(--terracotta); }
.quote-card p { font-family: var(--font-display); font-size: 1.1rem; font-style: italic; color: var(--ink); }
.quote-card__by { display: flex; align-items: center; gap: 0.8rem; margin-top: 1rem; }
.quote-card__photo { width: 46px; height: 46px; border-radius: 50%; overflow: hidden; flex-shrink: 0; }

.table-simple { width: 100%; border-collapse: collapse; }
.table-simple th, .table-simple td { text-align: left; padding: 0.75rem 1rem; border-bottom: 1px solid var(--line); font-size: 0.94rem; }
.table-simple th { color: var(--stone); font-weight: 600; font-size: 0.82rem; }
.table-wrap { overflow-x: auto; border-radius: var(--radius-m); border: 1px solid var(--line); }

.breadcrumb { font-size: 0.85rem; color: var(--stone); margin-bottom: 1rem; }
.breadcrumb a { text-decoration: none; }
.breadcrumb a:hover { text-decoration: underline; }

.page-hero { background: var(--forest); color: var(--white); padding-block: clamp(3rem, 8vw, 4.5rem) clamp(2rem, 5vw, 3rem); position: relative; overflow: hidden; }
.page-hero::after { content: ''; position: absolute; right: -10%; bottom: -30%; width: 420px; height: 420px; border-radius: 50%; background: radial-gradient(circle, rgba(232,163,61,0.25), transparent 70%); }
.page-hero h1 { color: var(--white); max-width: 22ch; }
.page-hero p { color: rgba(247,245,239,0.82); }

.download-row { display: flex; align-items: center; justify-content: space-between; gap: 1rem; padding: 1rem 1.3rem; border: 1px solid var(--line); border-radius: var(--radius-m); background: var(--white); }
.download-row__meta { font-size: 0.82rem; color: var(--stone); }

.badge-list { display: flex; gap: 0.6rem; flex-wrap: wrap; }
.badge-list li, .pill { list-style: none; font-size: 0.8rem; padding: 0.35em 0.9em; border-radius: 999px; background: var(--paper-2); color: var(--ink); }

.tabs { display: flex; gap: 0.5rem; flex-wrap: wrap; margin-bottom: 1.8rem; }
.tab-btn { padding: 0.6em 1.2em; border-radius: 999px; border: 1px solid var(--line); background: var(--white); cursor: pointer; font-weight: 600; font-size: 0.9rem; font-family: var(--font-body); transition: background 150ms var(--ease), color 150ms var(--ease); }
.tab-btn.is-active, .tab-btn:hover { background: var(--forest); color: var(--white); border-color: var(--forest); }
.tab-panel { display: none; }
.tab-panel.is-active { display: block; }

.form-field { display: flex; flex-direction: column; gap: 0.4rem; margin-bottom: 1.2rem; }
.form-field label { font-size: 0.85rem; font-weight: 600; }
.form-field input, .form-field select, .form-field textarea {
    padding: 0.75em 1em; border-radius: var(--radius-s); border: 1px solid var(--line); font-family: var(--font-body); font-size: 0.96rem; background: var(--white);
}
.form-field input:focus, .form-field select:focus, .form-field textarea:focus { outline: 2px solid var(--terracotta); outline-offset: 1px; }
.form-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 1.2rem; }
@media (max-width: 620px) { .form-grid { grid-template-columns: 1fr; } }

/* ---------------------------------------------------------------- reveal-on-scroll (single orchestrated pattern) */
.reveal { opacity: 0; transform: translateY(18px); transition: opacity 620ms var(--ease), transform 620ms var(--ease); }
.reveal.is-visible { opacity: 1; transform: translateY(0); }
@media (prefers-reduced-motion: reduce) { .reveal { opacity: 1; transform: none; transition: none; } }

/* ---------------------------------------------------------------- footer */
.site-footer { background: var(--ink); color: var(--paper-2); padding-block: clamp(3rem, 6vw, 4.5rem) 1.5rem; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr 1.1fr; gap: 2.2rem; }
@media (max-width: 980px) { .footer-grid { grid-template-columns: 1fr 1fr; } }
@media (max-width: 560px) { .footer-grid { grid-template-columns: 1fr; } }
.site-footer h4 { color: var(--white); font-size: 0.85rem; text-transform: none; letter-spacing: 0.02em; margin-bottom: 1rem; font-family: var(--font-body); font-weight: 700; }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.55rem; }
.site-footer a { text-decoration: none; color: rgba(247,245,239,0.78); font-size: 0.92rem; }
.site-footer a:hover { color: var(--saffron); }
.footer-bottom { border-top: 1px solid rgba(247,245,239,0.14); margin-top: 2.5rem; padding-top: 1.5rem; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 0.8rem; font-size: 0.82rem; color: rgba(247,245,239,0.6); }
.social-row { display: flex; gap: 0.7rem; }
.social-row a { width: 36px; height: 36px; border-radius: 50%; border: 1px solid rgba(247,245,239,0.25); display: flex; align-items: center; justify-content: center; }
.social-row a:hover { background: var(--saffron); color: var(--ink); border-color: var(--saffron); }

.skip-link { position: absolute; left: -999px; top: 0; background: var(--saffron); color: var(--ink); padding: 0.8em 1.2em; z-index: 200; border-radius: 0 0 8px 0; }
.skip-link:focus { left: 0; }

.section-head { display: flex; justify-content: space-between; align-items: flex-end; gap: 2rem; margin-bottom: 2.2rem; flex-wrap: wrap; }
.text-center { text-align: center; }
.mx-auto { margin-inline: auto; }
.max-w-content { max-width: 62ch; }