/* ==========================================================================
   ELLS — style.css
   Design system (variables, reset, typography) + home-page-specific layout.
   Reusable components (nav, buttons, cards, footer) live in components.css.
   Media queries live in responsive.css.
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. Design tokens
   -------------------------------------------------------------------------- */
:root {
    /* Color */
    --color-ivory: #FAF6EE;
    --color-ivory-deep: #F1E9D8;
    --color-ink: #211D1A;
    --color-ink-soft: #4A423A;
    --color-muted: #7C7266;
    --color-burgundy: #6E1423;
    --color-burgundy-deep: #4C0E19;
    --color-burgundy-tint: #F3E3E1;
    --color-line: #E1D8C5;
    --color-line-strong: #CFC2A9;
    --color-white: #FFFFFF;

    /* Typography */
    --font-serif: 'Literata', Georgia, 'Times New Roman', serif;
    --font-sans: 'Source Sans 3', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    --fs-xs: 0.8125rem;
    /* 13px */
    --fs-sm: 0.9375rem;
    /* 15px */
    --fs-base: 1rem;
    /* 16px */
    --fs-md: 1.125rem;
    /* 18px */
    --fs-lg: 1.375rem;
    /* 22px */
    --fs-xl: 1.75rem;
    /* 28px */
    --fs-2xl: 2.25rem;
    /* 36px */
    --fs-3xl: 3rem;
    /* 48px */
    --fs-4xl: 3.75rem;
    /* 60px */

    /* Spacing (multiples of 4px) */
    --space-3xs: 0.25rem;
    --space-2xs: 0.5rem;
    --space-xs: 0.75rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 4rem;
    --space-3xl: 6rem;
    --space-4xl: 8rem;

    /* Layout */
    --container-width: 1200px;
    --radius-sm: 2px;
    --radius-md: 4px;

    /* Motion */
    --transition-fast: 150ms ease;
    --transition-base: 250ms ease;
    --transition-slow: 500ms ease;
}

/* --------------------------------------------------------------------------
   2. Reset & base
   -------------------------------------------------------------------------- */
*,
*::before,
*::after {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    font-family: var(--font-sans);
    font-size: var(--fs-base);
    line-height: 1.65;
    color: var(--color-ink);
    background: var(--color-ivory);
    -webkit-font-smoothing: antialiased;
}

img {
    max-width: 100%;
    display: block;
}

a {
    color: inherit;
    text-decoration: none;
}

ul {
    margin: 0;
    padding: 0;
    list-style: none;
}

h1,
h2,
h3,
h4 {
    font-family: var(--font-serif);
    font-weight: 600;
    line-height: 1.2;
    color: var(--color-ink);
    margin: 0 0 var(--space-sm);
}

p {
    margin: 0 0 var(--space-sm);
    color: var(--color-ink-soft);
}

button {
    font-family: inherit;
}

a:focus-visible,
button:focus-visible,
input:focus-visible {
    outline: 2px solid var(--color-burgundy);
    outline-offset: 2px;
}

/* --------------------------------------------------------------------------
   3. Layout utilities
   -------------------------------------------------------------------------- */
.container {
    max-width: var(--container-width);
    margin-inline: auto;
    padding-inline: var(--space-lg);
}

.visually-hidden {
    position: absolute !important;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0 0 0 0);
    white-space: nowrap;
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    background: var(--color-burgundy);
    color: #fff;
    padding: var(--space-2xs) var(--space-sm);
    z-index: 1000;
}

.skip-link:focus {
    left: var(--space-sm);
    top: var(--space-sm);
}

section {
    padding-block: var(--space-3xl);
}

.section-heading {
    max-width: 640px;
    margin-bottom: var(--space-xl);
}

.section-heading h2 {
    font-size: var(--fs-2xl);
}

.section-note {
    color: var(--color-muted);
    font-size: var(--fs-sm);
    margin-bottom: 0;
}

/* Restrained scroll-reveal: applied once per section, not per card. */
.reveal {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity var(--transition-slow), transform var(--transition-slow);
}

.reveal.is-visible {
    opacity: 1;
    transform: none;
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    .reveal {
        opacity: 1;
        transform: none;
        transition: none;
    }
}

/* --------------------------------------------------------------------------
   4. Hero
   -------------------------------------------------------------------------- */
.hero {
    padding-top: calc(var(--space-3xl) + 1.5rem);
}

.hero-inner {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: var(--space-2xl);
    align-items: center;
}

.hero-title {
    font-size: var(--fs-4xl);
    max-width: 14ch;
}

.hero-subtitle {
    font-family: var(--font-serif);
    font-style: italic;
    font-size: var(--fs-md);
    color: var(--color-burgundy);
    margin-bottom: var(--space-sm);
}

.hero-text {
    max-width: 46ch;
    font-size: var(--fs-md);
}

.hero-actions {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-lg);
    flex-wrap: wrap;
}

.hero-visual {
    border: 1px solid var(--color-line-strong);
    background: var(--color-ivory-deep);
    aspect-ratio: 4 / 5;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: var(--space-xl);
}

.hero-visual-label {
    font-family: var(--font-serif);
    font-size: var(--fs-sm);
    letter-spacing: 0.03em;
    color: var(--color-ink-soft);
}

.hero-visual-label-end {
    align-self: flex-end;
}

.hero-visual-symbol {
    font-family: var(--font-serif);
    font-size: 6rem;
    color: var(--color-burgundy);
    text-align: center;
    line-height: 1;
}

/* --------------------------------------------------------------------------
   5. Introduction
   -------------------------------------------------------------------------- */
.intro-inner {
    max-width: 760px;
}

.intro-text h2 {
    font-size: var(--fs-2xl);
}

.intro-text p {
    font-size: var(--fs-md);
    max-width: 65ch;
}

/* --------------------------------------------------------------------------
   6. What We Do (grid skeleton — card look lives in components.css)
   -------------------------------------------------------------------------- */
.activities-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg) var(--space-lg);
}

/* --------------------------------------------------------------------------
   7. Upcoming Events (grid skeleton)
   -------------------------------------------------------------------------- */
.events-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

/* --------------------------------------------------------------------------
   8. Student Voices (grid skeleton)
   -------------------------------------------------------------------------- */
.voices-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-lg);
}

/* --------------------------------------------------------------------------
   9. Literature & Linguistics split
   -------------------------------------------------------------------------- */
.disciplines-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
}

.discipline-panel {
    padding-right: var(--space-2xl);
}

.discipline-panel-ling {
    padding-right: 0;
    padding-left: var(--space-2xl);
    border-left: 1px solid var(--color-line-strong);
}

.discipline-panel h3 {
    font-size: var(--fs-xl);
    color: var(--color-burgundy);
}

.discipline-panel p {
    max-width: 42ch;
}

/* --------------------------------------------------------------------------
   10. Featured Publication / Journal
   -------------------------------------------------------------------------- */
.journal {
    background: var(--color-ivory-deep);
}

.journal-inner {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: var(--space-2xl);
    align-items: center;
}

.journal-cover {
    border: 1px solid var(--color-line-strong);
    background: var(--color-ivory);
    aspect-ratio: 3 / 4;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: var(--space-lg);
}

.journal-cover-label {
    font-family: var(--font-serif);
    font-size: var(--fs-lg);
    line-height: 1.35;
}

.journal-cover-volume {
    font-family: var(--font-sans);
    font-size: var(--fs-sm);
    font-weight: 600;
    color: var(--color-burgundy);
    letter-spacing: 0.05em;
}

.journal-content h2 {
    font-size: var(--fs-2xl);
}

.journal-content p {
    font-size: var(--fs-md);
    max-width: 60ch;
}

/* --------------------------------------------------------------------------
   11. Gallery Preview (grid skeleton)
   -------------------------------------------------------------------------- */
.gallery-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
}

/* --------------------------------------------------------------------------
   12. Join ELLS CTA
   -------------------------------------------------------------------------- */
.join-cta {
    background: var(--color-burgundy);
    color: #fff;
    text-align: center;
}

.join-inner {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
}

.join-cta h2 {
    color: #fff;
    font-size: var(--fs-2xl);
}

.join-cta p {
    color: var(--color-burgundy-tint);
    max-width: 50ch;
    font-size: var(--fs-md);
}