/* =====================================================================
   Global Tamil University – base styles
   Design frame: 1440px (Figma). All sizes below are Figma px.
   ===================================================================== */

:root {
    /* Brand colours (from Figma) */
    --navy: #0B386F;          /* top bar, nav text, buttons text */
    --navy-heading: #0C3970;  /* big headings */
    --yellow: #FFBA10;        /* buttons, highlights */
    --border: #D1E1E9;        /* borders, dividers */
    --ice: #E4F9FF;           /* hero gradient */
    --header-bg: rgba(251, 254, 255, 0.95);  /* #FBFEFF 95% */
    --text: #4A5B6D;          /* body text */
    --white: #FFFFFF;

    /* Fonts */
    --font-heading: 'Manrope', system-ui, sans-serif;
    --font-text: 'DM Sans', system-ui, sans-serif;

    /* Layout */
    --frame: 1440px;
    --topbar-h: 36px;
    --header-h: 81px;
    --fixed-h: calc(var(--topbar-h) + var(--header-h));   /* 117px */
}

body.no-topbar { --topbar-h: 0px; }

*,
*::before,
*::after { box-sizing: border-box; }

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
}

body {
    margin: 0;
    padding-top: var(--fixed-h);          /* space for fixed top bar + navbar */
    font-family: var(--font-text);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text);
    background: var(--white);
    -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
    margin: 0;
    font-family: var(--font-heading);
    color: var(--navy-heading);
}

p { margin: 0; }
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
ul { margin: 0; padding: 0; list-style: none; }

/* Anchor jumps land below the fixed header */
section[id], [id].anchor { scroll-margin-top: var(--fixed-h); }

.icon { flex-shrink: 0; }

/* Centered 1440 frame */
.frame {
    width: 100%;
    max-width: var(--frame);
    margin-inline: auto;
}

/* ---------- Eyebrow: yellow dash + small navy caps ("— OUR ACADEMICS") ---------- */
.eyebrow {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-heading);
    font-size: 11px;
    font-weight: 800;
    line-height: 16px;
    letter-spacing: 1.5px;
    color: var(--navy);
    text-transform: uppercase;
}

.eyebrow::before {
    content: "";
    width: 24px;
    height: 3px;
    border-radius: 2px;
    background: var(--yellow);
    flex-shrink: 0;
}

.eyebrow--yellow { color: var(--yellow); }   /* on dark backgrounds */

/* ---------- Buttons ---------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    height: 43px;
    padding: 0 20px;
    border: 0;
    border-radius: 3px;
    font-family: var(--font-heading);
    font-size: 14px;
    font-weight: 800;
    line-height: 1;
    white-space: nowrap;
    cursor: pointer;
    transition: background-color .2s ease, color .2s ease, transform .2s ease, box-shadow .2s ease;
}

.btn .icon { width: 16px; height: 16px; transition: transform .2s ease; }
.btn:hover .icon { transform: translateX(3px); }

.btn-primary {
    background: var(--yellow);
    color: var(--navy);
}
.btn-primary:hover {
    background: #F2AE00;
    box-shadow: 0 8px 20px rgba(255, 186, 16, .35);
}

/* Outline button: yellow border + text, pale fill on hover */
.btn-outline {
    background: transparent;
    color: var(--yellow);
    border: 1px solid var(--yellow);
    transition: background-color .3s ease, color .3s ease;
}
.btn-outline:hover { background: rgba(255, 186, 16, 0.14); }

.btn:focus-visible,
a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--navy);
    outline-offset: 3px;
}

/* Screen-reader only */
.sr-only {
    position: absolute !important;
    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) {
    html { scroll-behavior: auto; }
    *, *::before, *::after { transition: none !important; animation: none !important; }
}