/* ==========================================================================
   SC&SS JNU Alumni Meet Platform — Visual Design System
   Visual Identity: SC&SS Editorial Heritage (Section 1–30 of design.md)
   Palette: Deep Navy (#102653 / #0B1B3A), Warm Ivory (#F6F1E7), Paper (#FBF9F4),
            Muted Gold (#C7A84B), Dark Ink (#182033), Muted Ink (#5E6270), White (#FFFFFF)
   Typography: Playfair Display (Serif Display Headlines) + Inter (Sans-Serif Body/UI)
   ========================================================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=Playfair+Display:ital,wght@0,500;0,600;0,700;1,400;1,600&display=swap');

:root {
    /* SC&SS Editorial Heritage Core Color Tokens */
    --color-navy: #102653;
    --color-deep-navy: #0B1B3A;
    --color-warm-ivory: #F6F1E7;
    --color-paper: #FBF9F4;
    --color-gold: #C7A84B;
    --color-dark-ink: #182033;
    --color-muted-ink: #5E6270;
    --color-white: #FFFFFF;

    /* Theme Mapping */
    --color-background: var(--color-warm-ivory);
    --color-surface: var(--color-paper);
    --color-surface-white: var(--color-white);
    --color-text: var(--color-dark-ink);
    --color-muted: var(--color-muted-ink);
    --color-border: rgba(16, 38, 83, 0.12);
    --color-accent: var(--color-navy);
    --color-accent-soft: rgba(16, 38, 83, 0.08);
    --color-accent-gold: var(--color-gold);
    --color-sepia: var(--color-navy);
    --color-sepia-light: rgba(16, 38, 83, 0.08);
    --color-sepia-dark: var(--color-deep-navy);
    --color-soft-black: var(--color-deep-navy);

    /* Typography Fonts */
    --font-display: "Playfair Display", Georgia, "Times New Roman", serif;
    --font-body: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;

    --font-display-weight: 600;
    --font-body-weight: 400;

    /* Fluid Typography (Section 24.5) */
    --font-display-size: clamp(2.1rem, 5.2vw, 3.8rem);
    --font-body-size: 1rem;

    --font-display-tracking: -0.02em;
    --font-body-tracking: -0.01em;

    --font-display-line-height: 1.08;
    --font-body-line-height: 1.6;

    /* Layout Geometry */
    --content-width: 1200px;
    --text-column-width: 720px;
    --grid-columns: 12;
    --grid-gap: 24px;
    --section-spacing: 96px;

    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;

    --border-width: 1px;
    --shadow-card: 0 4px 16px rgba(16, 38, 83, 0.04);
    --shadow-floating: 0 8px 32px rgba(16, 38, 83, 0.1);

    --button-height: 46px;
    --button-padding: 22px;
    --button-radius: 6px;

    --card-padding: 2rem;

    --motion-duration: 250ms;
    --motion-easing: cubic-bezier(.2, .7, .2, 1);

    --page-padding-mobile: 16px;
    --page-padding-tablet: 28px;
    --page-padding-desktop: 40px;

    /* Spacing Scale */
    --space-2xs: 0.25rem;
    --space-xs: 0.5rem;
    --space-sm: 1rem;
    --space-md: 1.5rem;
    --space-lg: 2rem;
    --space-xl: 3rem;
    --space-2xl: 5rem;

    --shadow-subtle: 0 1px 3px rgba(16, 38, 83, 0.05);

    /* Functional Status Colors */
    --color-success: #1E6338;
    --color-success-bg: #EDF6F0;
    --color-warning: #875218;
    --color-warning-bg: #FAF3EC;
    --color-danger: #852222;
    --color-danger-bg: #FAEEEE;
}

/* ==========================================================================
   Reset & Viewport Integrity (Section 24.3 & 24.8: Zero Horizontal Scroll)
   ========================================================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    scroll-behavior: smooth;
    overflow-x: hidden;
    width: 100%;
    max-width: 100vw;
}

body {
    font-family: var(--font-body);
    font-size: var(--font-body-size);
    font-weight: var(--font-body-weight);
    line-height: var(--font-body-line-height);
    letter-spacing: var(--font-body-tracking);
    color: var(--color-text);
    background-color: var(--color-background);
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
    width: 100%;
    max-width: 100vw;
    min-height: 100vh;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
    border-radius: var(--radius-sm);
}

a {
    color: var(--color-navy);
    text-decoration: none;
    transition: color 0.15s ease, opacity 0.15s ease;
}

a:hover {
    color: var(--color-gold);
}

/* ==========================================================================
   Typography Hierarchy (Section 4, 5, 24.5)
   ========================================================================== */
h1, h2, h3, h4, .serif-font {
    font-family: var(--font-display);
    font-weight: var(--font-display-weight);
    line-height: var(--font-display-line-height);
    letter-spacing: var(--font-display-tracking);
    color: var(--color-text);
    overflow-wrap: break-word;
    word-break: break-word;
}

h1, .hero-title {
    font-size: var(--font-display-size);
}

h2, .section-title {
    font-size: clamp(1.5rem, 3.6vw, 2.4rem);
    margin-bottom: var(--space-xs);
}

h3 {
    font-size: clamp(1.15rem, 2.4vw, 1.6rem);
}

h4 {
    font-size: 1.05rem;
    font-weight: 600;
}

p {
    margin-bottom: var(--space-sm);
    color: var(--color-muted);
    font-size: var(--font-body-size);
    overflow-wrap: break-word;
}

.eyebrow {
    font-family: var(--font-body);
    font-size: clamp(0.7rem, 0.9vw, 0.78rem);
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--color-gold);
    margin-bottom: var(--space-xs);
    display: block;
}

.lead-text {
    font-size: clamp(1.02rem, 1.6vw, 1.2rem);
    line-height: 1.6;
    color: var(--color-text);
    font-weight: 400;
}

/* ==========================================================================
   Editorial Dividers & Rules (Section 6, 19)
   ========================================================================== */
.editorial-rule {
    width: 44px;
    height: 1px;
    background-color: var(--color-gold);
    border: none;
    margin: var(--space-xs) 0 var(--space-md);
}

.editorial-rule-center {
    margin-left: auto;
    margin-right: auto;
}

.editorial-divider-full {
    width: 100%;
    height: 1px;
    background-color: var(--color-border);
    border: none;
    margin: var(--space-lg) 0;
}

.vertical-rule {
    border-left: 2px solid var(--color-gold);
    padding-left: var(--space-md);
    margin: var(--space-md) 0;
}

/* Editorial Section Label */
.section-label {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    font-family: var(--font-body);
    font-size: 0.75rem;
    font-weight: 700;
    letter-spacing: 0.16em;
    text-transform: uppercase;
    color: var(--color-gold);
    margin-bottom: var(--space-sm);
}

.section-label .label-num {
    color: var(--color-navy);
    font-family: var(--font-display);
    font-size: 0.95rem;
    font-weight: 700;
}

/* ==========================================================================
   Layout Containers & Spacing (Section 7, 8, 24.2, 24.6)
   ========================================================================== */
.container {
    max-width: var(--content-width);
    margin: 0 auto;
    padding-inline: var(--page-padding-mobile);
    width: 100%;
    box-sizing: border-box;
}

@media (min-width: 640px) {
    .container {
        padding-inline: var(--page-padding-tablet);
    }
}

@media (min-width: 1024px) {
    .container {
        padding-inline: var(--page-padding-desktop);
    }
}

.container-narrow {
    max-width: var(--text-column-width);
    margin: 0 auto;
    width: 100%;
    box-sizing: border-box;
}

.section {
    padding: clamp(56px, 8vw, var(--section-spacing)) 0;
}

.section-paper {
    background-color: var(--color-background);
}

.section-off-white {
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.section-dark {
    background-color: var(--color-deep-navy);
    color: var(--color-warm-ivory);
}

.section-dark h1, .section-dark h2, .section-dark h3, .section-dark h4 {
    color: #FFFFFF;
}

.section-dark p {
    color: rgba(255, 255, 255, 0.85);
}

/* ==========================================================================
   Buttons & Touch Targets (Section 17, 24.4)
   ========================================================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    min-height: var(--button-height);
    padding-inline: var(--button-padding);
    padding-block: 0.6rem;
    font-family: var(--font-body);
    font-size: 0.88rem;
    font-weight: 600;
    letter-spacing: 0.02em;
    border-radius: var(--button-radius);
    cursor: pointer;
    transition: all 0.18s ease;
    border: 1px solid transparent;
    text-decoration: none;
    line-height: 1.2;
    text-align: center;
    max-width: 100%;
    box-sizing: border-box;
}

.btn-primary, .btn-ink {
    background-color: var(--color-navy);
    color: #FFFFFF;
    border: none;
}

.btn-primary:hover, .btn-ink:hover {
    background-color: var(--color-deep-navy);
    color: #FFFFFF;
}

.btn-secondary {
    background-color: var(--color-paper);
    color: var(--color-navy);
    border: 1px solid var(--color-border);
}

.btn-secondary:hover {
    background-color: var(--color-warm-ivory);
    border-color: var(--color-navy);
}

.btn-paper {
    background-color: var(--color-paper);
    color: var(--color-navy);
    border: 1px solid var(--color-gold);
    font-weight: 600;
}

.btn-paper:hover {
    background-color: var(--color-white);
    color: var(--color-deep-navy);
}

.btn-outline-paper {
    background-color: transparent;
    color: #FFFFFF;
    border: 1px solid rgba(255, 255, 255, 0.4);
}

.btn-outline-paper:hover {
    background-color: rgba(255, 255, 255, 0.1);
    border-color: #FFFFFF;
}

.btn-sm {
    min-height: 38px;
    padding-inline: 14px;
    font-size: 0.82rem;
}

.btn-lg {
    min-height: calc(var(--button-height) + 4px);
    padding-inline: calc(var(--button-padding) + 6px);
    font-size: 0.98rem;
}

.btn-group {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-top: var(--space-md);
    width: 100%;
    max-width: 100%;
}

@media (max-width: 640px) {
    .btn-group {
        flex-direction: column;
        width: 100%;
    }
    .btn-group .btn {
        width: 100%;
    }
}

/* ==========================================================================
   Site Header & Mobile Navigation (Section 9, 24.4)
   ========================================================================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(246, 241, 231, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--color-border);
}

.header-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 0.75rem;
    padding-bottom: 0.75rem;
    gap: 1rem;
    width: 100%;
    box-sizing: border-box;
}

.brand-link {
    display: flex;
    align-items: center;
    gap: 0.65rem;
    text-decoration: none;
    flex-shrink: 1;
    min-width: 0;
}

.brand-logo {
    width: 36px;
    height: 36px;
    flex-shrink: 0;
}

.brand-text-wrapper {
    display: flex;
    flex-direction: column;
    min-width: 0;
}

.brand-title {
    font-family: var(--font-display);
    font-size: clamp(1rem, 2.2vw, 1.25rem);
    font-weight: 700;
    color: var(--color-navy);
    line-height: 1.1;
    white-space: nowrap;
}

.brand-subtitle {
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: var(--color-muted);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

@media (max-width: 480px) {
    .brand-subtitle {
        display: none;
    }
}

.main-nav {
    display: flex;
    align-items: center;
    margin-left: auto;
}

.nav-links {
    display: flex;
    list-style: none;
    gap: clamp(0.8rem, 1.4vw, 1.5rem);
    align-items: center;
}

.nav-link {
    font-family: var(--font-body);
    font-size: 0.86rem;
    font-weight: 500;
    color: var(--color-text);
    padding: 0.5rem 0;
    position: relative;
    letter-spacing: 0.01em;
    transition: color 0.15s ease;
    display: inline-flex;
    align-items: center;
    min-height: 40px;
    white-space: nowrap;
}

.nav-link:hover, .nav-link.active {
    color: var(--color-navy);
}

.nav-link.active::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 0;
    right: 0;
    height: 2px;
    background-color: var(--color-gold);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-shrink: 0;
}

/* Hamburger Toggle Button for Mobile & Tablets */
.nav-toggle {
    display: none;
    background-color: var(--color-paper);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    cursor: pointer;
    width: 40px;
    height: 40px;
    min-width: 40px;
    min-height: 40px;
    padding: 0;
    align-items: center;
    justify-content: center;
    flex-direction: column;
    gap: 4px;
    border-radius: var(--radius-sm);
    transition: all 0.2s ease;
    flex-shrink: 0;
}

.hamburger-bar {
    display: block;
    width: 18px;
    height: 2px;
    background-color: var(--color-navy);
    border-radius: 1px;
    transition: transform 0.25s cubic-bezier(0.16, 1, 0.3, 1), opacity 0.2s ease;
}

.nav-toggle:hover {
    background-color: var(--color-warm-ivory);
    border-color: var(--color-gold);
}

.nav-toggle.active .hamburger-bar:nth-child(1) {
    transform: translateY(6px) rotate(45deg);
}

.nav-toggle.active .hamburger-bar:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active .hamburger-bar:nth-child(3) {
    transform: translateY(-6px) rotate(-45deg);
}

.mobile-nav-cta {
    display: none;
}

.desktop-nav-cta {
    white-space: nowrap;
    flex-shrink: 0;
}

@media (max-width: 960px) {
    .desktop-nav-cta {
        display: none;
    }

    .mobile-nav-cta {
        display: block;
        width: 100%;
        margin-top: 0.5rem;
    }

    .nav-toggle {
        display: inline-flex;
    }

    .nav-links {
        display: none;
        flex-direction: column;
        width: 100%;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background-color: var(--color-paper);
        border-bottom: 1px solid var(--color-border);
        padding: 1rem 1.25rem 1.5rem;
        box-shadow: 0 12px 28px rgba(16, 38, 83, 0.1);
        gap: 0.5rem;
        align-items: stretch;
        z-index: 999;
        box-sizing: border-box;
    }

    .nav-links.show {
        display: flex;
    }

    .nav-link {
        padding: 0.75rem 1rem;
        border-radius: var(--radius-sm);
        border-bottom: 1px solid var(--color-border);
        width: 100%;
        font-size: 0.95rem;
        font-weight: 600;
        color: var(--color-text);
        background-color: var(--color-warm-ivory);
        min-height: 44px;
    }

    .nav-link.active::after {
        display: none;
    }

    .nav-link:hover, .nav-link.active {
        background-color: var(--color-paper);
        color: var(--color-navy);
        border-left: 3px solid var(--color-gold);
    }
}

/* ==========================================================================
   Hero Section (Section 10, 24.4)
   ========================================================================== */
.hero {
    padding: clamp(40px, 6vw, var(--space-xl)) 0 var(--space-lg);
    border-bottom: 1px solid var(--color-border);
    background-color: var(--color-background);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--grid-gap);
    align-items: center;
    max-width: 100%;
}

@media (min-width: 1024px) {
    .hero-grid {
        grid-template-columns: 1.2fr 0.8fr;
    }
}

.hero-meta-bar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(130px, 1fr));
    gap: var(--space-sm);
    margin: var(--space-md) 0 var(--space-lg);
    padding: var(--space-sm) 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
    max-width: 100%;
}

.meta-item {
    display: flex;
    flex-direction: column;
}

.meta-label {
    font-size: 0.68rem;
    text-transform: uppercase;
    letter-spacing: 0.12em;
    font-weight: 700;
    color: var(--color-gold);
}

.meta-value {
    font-size: clamp(0.9rem, 1.3vw, 1.02rem);
    font-weight: 600;
    color: var(--color-text);
}

.hero-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--card-padding);
    box-shadow: var(--shadow-card);
    max-width: 100%;
}

.hero-card-badge {
    display: inline-block;
    background-color: var(--color-navy);
    color: #FFFFFF;
    font-size: 0.7rem;
    font-weight: 700;
    padding: 0.25rem 0.55rem;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--space-sm);
}

.divider {
    height: 1px;
    background-color: var(--color-border);
    margin: var(--space-md) 0;
}

/* ==========================================================================
   Responsive Archive Timeline (Section 15, 24.4)
   ========================================================================== */
.timeline-section {
    padding: clamp(48px, 7vw, var(--section-spacing)) 0;
    border-bottom: 1px solid var(--color-border);
    background-color: var(--color-surface);
}

.timeline-wrapper {
    width: 100%;
    padding: var(--space-sm) 0;
}

@media (min-width: 768px) {
    .timeline-track {
        display: flex;
        width: 100%;
        position: relative;
        padding: var(--space-md) 0;
    }

    .timeline-track::before {
        content: '';
        position: absolute;
        top: 22px;
        left: 0;
        right: 0;
        height: 1px;
        background-color: var(--color-gold);
        z-index: 1;
    }

    .timeline-node {
        flex: 1;
        position: relative;
        text-align: center;
        z-index: 2;
    }

    .timeline-dot {
        width: 12px;
        height: 12px;
        background-color: var(--color-surface);
        border: 2px solid var(--color-navy);
        border-radius: 50%;
        margin: 0 auto var(--space-xs);
    }
}

@media (max-width: 767px) {
    .timeline-track {
        display: flex;
        flex-direction: column;
        gap: 1.25rem;
        position: relative;
        padding-left: 1.75rem;
        margin-top: 1rem;
    }

    .timeline-track::before {
        content: '';
        position: absolute;
        top: 8px;
        bottom: 8px;
        left: 5px;
        width: 1px;
        background-color: var(--color-gold);
        z-index: 1;
    }

    .timeline-node {
        position: relative;
        text-align: left;
        z-index: 2;
    }

    .timeline-dot {
        position: absolute;
        left: -1.75rem;
        top: 4px;
        width: 12px;
        height: 12px;
        background-color: var(--color-background);
        border: 2px solid var(--color-navy);
        border-radius: 50%;
    }
}

.timeline-year {
    font-family: var(--font-body);
    font-weight: 700;
    font-size: 0.92rem;
    color: var(--color-text);
}

.timeline-label {
    font-size: 0.78rem;
    color: var(--color-muted);
}

/* ==========================================================================
   Editorial Cards & Responsive Grids (Section 16, 24.2, 24.4)
   ========================================================================== */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--grid-gap);
    max-width: 100%;
}

@media (min-width: 768px) {
    .grid-2 {
        grid-template-columns: repeat(2, 1fr);
    }
}

.grid-3 {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--grid-gap);
    max-width: 100%;
}

@media (min-width: 640px) {
    .grid-3 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .grid-3 {
        grid-template-columns: repeat(3, 1fr);
    }
}

.grid-4 {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--grid-gap);
    max-width: 100%;
}

@media (min-width: 640px) {
    .grid-4 {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .grid-4 {
        grid-template-columns: repeat(4, 1fr);
    }
}

.content-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--card-padding);
    box-shadow: var(--shadow-card);
    transition: border-color 0.15s ease;
    max-width: 100%;
    box-sizing: border-box;
}

.content-card:hover {
    border-color: var(--color-gold);
}

.content-card h3 {
    margin-bottom: var(--space-xs);
}

/* ==========================================================================
   Then and Now Section
   ========================================================================== */
.then-now-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--grid-gap);
    margin-top: var(--space-md);
    max-width: 100%;
}

@media (min-width: 768px) {
    .then-now-grid {
        grid-template-columns: 1fr 1fr;
    }
}

.then-now-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--card-padding);
    box-shadow: var(--shadow-card);
    max-width: 100%;
}

.then-now-card .card-caption {
    margin-top: 0.75rem;
    font-size: 0.82rem;
    color: var(--color-muted);
}

/* ==========================================================================
   Support & Contribution Dark CTA Section
   ========================================================================== */
.cta-banner {
    background-color: var(--color-deep-navy);
    color: var(--color-warm-ivory);
    border: 1px solid rgba(199, 168, 75, 0.3);
    border-radius: var(--radius-md);
    padding: clamp(2rem, 4vw, 3.5rem) clamp(1.25rem, 3vw, 2.5rem);
    text-align: center;
    position: relative;
    overflow: hidden;
    box-shadow: var(--shadow-floating);
    max-width: 100%;
    box-sizing: border-box;
}

.cta-banner h2 {
    color: #FFFFFF;
    margin-bottom: var(--space-xs);
}

.cta-banner p {
    color: rgba(246, 241, 231, 0.85);
    max-width: 660px;
    margin: 0 auto var(--space-lg);
    font-size: clamp(0.98rem, 1.8vw, 1.12rem);
}

/* ==========================================================================
   Public Alumni Directory (Section 13, 24.4)
   ========================================================================== */
.alumni-filter-bar {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: 1rem;
    margin-bottom: var(--space-lg);
    max-width: 100%;
    box-sizing: border-box;
}

.filter-form {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    align-items: center;
    width: 100%;
}

.form-control {
    min-height: var(--button-height);
    padding: 0.6rem 0.85rem;
    font-family: var(--font-body);
    font-size: 16px;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    background-color: var(--color-surface);
    color: var(--color-text);
    max-width: 100%;
    box-sizing: border-box;
}

@media (max-width: 640px) {
    .filter-form .form-control, .filter-form button, .filter-form a {
        width: 100%;
        min-width: 100%;
    }
}

.form-control:focus {
    outline: none;
    border-color: var(--color-navy);
    box-shadow: 0 0 0 1px var(--color-gold);
}

.alumni-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--grid-gap);
    max-width: 100%;
}

@media (min-width: 640px) {
    .alumni-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .alumni-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.alumnus-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--card-padding);
    box-shadow: var(--shadow-card);
    display: flex;
    flex-direction: column;
    max-width: 100%;
    box-sizing: border-box;
}

.alumnus-card:hover {
    border-color: var(--color-gold);
}

.alumnus-name {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 0.2rem;
}

.alumnus-batch {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--color-navy);
    margin-bottom: 0.4rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.alumnus-role {
    font-size: 0.9rem;
    color: var(--color-muted);
}

.alumnus-location {
    font-size: 0.78rem;
    color: var(--color-muted);
    margin-top: auto;
    padding-top: var(--space-xs);
}

/* ==========================================================================
   Table Responsiveness (Section 24.8)
   ========================================================================== */
.table-responsive {
    width: 100%;
    max-width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    margin-top: 1rem;
}

.supporter-table {
    width: 100%;
    border-collapse: collapse;
    min-width: 540px;
}

.supporter-table th, .supporter-table td {
    padding: 0.75rem 0.85rem;
    border-bottom: 1px solid var(--color-border);
    text-align: left;
    font-size: 0.9rem;
}

.supporter-table th {
    background-color: var(--color-warm-ivory);
    font-weight: 600;
    color: var(--color-navy);
    font-size: 0.78rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

/* ==========================================================================
   Alerts & Notifications
   ========================================================================== */
.flash-container {
    margin-top: var(--space-md);
}

.alert {
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-sm);
    margin-bottom: var(--space-sm);
    font-size: 0.92rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.alert-success { background-color: var(--color-success-bg); color: var(--color-success); border: 1px solid var(--color-success); }
.alert-warning { background-color: var(--color-warning-bg); color: var(--color-warning); border: 1px solid var(--color-warning); }
.alert-danger { background-color: var(--color-danger-bg); color: var(--color-danger); border: 1px solid var(--color-danger); }
.alert-info { background-color: rgba(16, 38, 83, 0.08); color: var(--color-navy); border: 1px solid var(--color-navy); }

/* ==========================================================================
   Footer
   ========================================================================== */
.site-footer {
    background-color: var(--color-deep-navy);
    color: var(--color-warm-ivory);
    padding: clamp(48px, 6vw, var(--section-spacing)) 0 var(--space-lg);
    border-top: 1px solid rgba(199, 168, 75, 0.2);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--grid-gap);
    margin-bottom: var(--space-lg);
    max-width: 100%;
}

@media (min-width: 768px) {
    .footer-grid {
        grid-template-columns: 2fr 1fr 1fr;
    }
}

.footer-brand h4 {
    color: #FFFFFF;
    font-family: var(--font-display);
    font-size: 1.25rem;
    margin-bottom: var(--space-xs);
}

.footer-brand p {
    color: rgba(246, 241, 231, 0.75);
    font-size: 0.88rem;
    max-width: 400px;
}

.footer-links h5 {
    color: var(--color-gold);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.14em;
    margin-bottom: var(--space-sm);
}

.footer-links ul {
    list-style: none;
}

.footer-links li {
    margin-bottom: var(--space-xs);
}

.footer-links a {
    color: rgba(246, 241, 231, 0.8);
    font-size: 0.86rem;
    display: inline-block;
    padding: 0.2rem 0;
    min-height: 36px;
    line-height: 28px;
}

.footer-links a:hover {
    color: #FFFFFF;
}

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.12);
    padding-top: var(--space-md);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    font-size: 0.8rem;
    color: rgba(246, 241, 231, 0.6);
}

/* Footer Development Notice Banner */
.footer-dev-banner {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(199, 168, 75, 0.35);
    border-radius: var(--radius-md);
    padding: var(--space-md) var(--space-lg);
    margin-bottom: var(--space-xl);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    flex-wrap: wrap;
}

.footer-dev-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(199, 168, 75, 0.15);
    color: var(--color-gold);
    border: 1px solid rgba(199, 168, 75, 0.4);
    padding: 0.35rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.72rem;
    font-weight: 700;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    white-space: nowrap;
    flex-shrink: 0;
}

.dev-pulse-dot {
    width: 8px;
    height: 8px;
    background-color: var(--color-gold);
    border-radius: 50%;
    display: inline-block;
    box-shadow: 0 0 0 0 rgba(199, 168, 75, 0.7);
    animation: pulse-gold-glow 2s infinite;
}

@keyframes pulse-gold-glow {
    0% {
        box-shadow: 0 0 0 0 rgba(199, 168, 75, 0.7);
    }
    70% {
        box-shadow: 0 0 0 6px rgba(199, 168, 75, 0);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(199, 168, 75, 0);
    }
}

.footer-dev-text {
    font-size: 0.86rem;
    color: rgba(246, 241, 231, 0.88);
    line-height: 1.5;
    flex: 1;
    min-width: 260px;
}

.footer-bottom-dev-note {
    display: inline-flex;
    align-items: center;
    gap: 0.45rem;
    color: var(--color-gold);
    font-weight: 600;
}

.status-indicator {
    width: 7px;
    height: 7px;
    background-color: var(--color-gold);
    border-radius: 50%;
    display: inline-block;
    box-shadow: 0 0 4px var(--color-gold);
}

@media (min-width: 640px) {
    .footer-bottom {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}

/* ==========================================================================
   Contribution Tracker Spotlight & Metric System
   ========================================================================== */
.section-tracker-spotlight {
    padding: clamp(48px, 6vw, var(--section-spacing)) 0;
    background-color: var(--color-surface);
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

.tracker-spotlight-card {
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--card-padding);
    box-shadow: var(--shadow-card);
    max-width: 100%;
    box-sizing: border-box;
}

.tracker-header-grid {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    flex-wrap: wrap;
    gap: var(--space-md);
    margin-bottom: var(--space-lg);
}

.tracker-cta-box {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    gap: 0.5rem;
    max-width: 100%;
}

@media (min-width: 768px) {
    .tracker-cta-box {
        align-items: flex-end;
    }
}

.badge-archive-tag {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    background-color: rgba(16, 38, 83, 0.08);
    color: var(--color-navy);
    font-size: 0.72rem;
    font-weight: 700;
    padding: 0.3rem 0.75rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.progress-container {
    margin: var(--space-md) 0 var(--space-lg);
    width: 100%;
}

.progress-meta-row {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    font-size: 0.92rem;
    color: var(--color-text);
    margin-bottom: 0.5rem;
}

@media (min-width: 640px) {
    .progress-meta-row {
        flex-direction: row;
        justify-content: space-between;
        align-items: center;
    }
}

.progress-track {
    width: 100%;
    height: 14px;
    background-color: var(--color-border);
    border-radius: 9999px;
    overflow: hidden;
    position: relative;
}

.progress-track-lg {
    height: 20px;
}

.progress-fill {
    height: 100%;
    background-color: var(--color-navy);
    border-radius: 9999px;
    position: relative;
    min-width: 8px;
}

.progress-indicator-pill {
    position: absolute;
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 0.7rem;
    font-weight: 700;
    color: #FFFFFF;
}

.tracker-kpi-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
    margin-top: var(--space-lg);
    max-width: 100%;
}

@media (min-width: 900px) {
    .tracker-kpi-grid {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--grid-gap);
    }
}

.kpi-mini-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: clamp(0.75rem, 2vw, 1.25rem);
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    max-width: 100%;
    box-sizing: border-box;
}

.kpi-mini-num {
    font-family: var(--font-display);
    font-size: clamp(1.3rem, 2.8vw, 1.75rem);
    font-weight: 700;
    color: var(--color-text);
    line-height: 1.1;
    margin-bottom: 0.25rem;
}

.kpi-mini-label {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--color-muted);
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.supporter-cards-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--grid-gap);
    max-width: 100%;
}

@media (min-width: 640px) {
    .supporter-cards-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (min-width: 1024px) {
    .supporter-cards-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.supporter-badge-card {
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: var(--space-md);
    box-shadow: var(--shadow-subtle);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    max-width: 100%;
    box-sizing: border-box;
}

.supporter-badge-card.badge-public { border-left: 3px solid var(--color-navy); }
.supporter-badge-card.badge-semi { border-left: 3px solid var(--color-gold); }
.supporter-badge-card.badge-anon { border-left: 3px solid var(--color-muted); }

.supporter-card-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.4rem;
}

.supporter-name {
    font-family: var(--font-body);
    font-weight: 700;
    font-size: 0.92rem;
    color: var(--color-text);
}

.supporter-amount {
    font-weight: 700;
    color: var(--color-navy);
    font-size: 0.92rem;
}

/* Supporter Roll Filters */
.roll-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin: 1rem 0;
    max-width: 100%;
}

.roll-tab {
    background-color: var(--color-paper);
    border: 1px solid var(--color-border);
    color: var(--color-text);
    padding: 0.4rem 0.85rem;
    font-size: 0.82rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all 0.15s ease;
    min-height: 38px;
    max-width: 100%;
}

.roll-tab.active, .roll-tab:hover {
    background-color: var(--color-navy);
    color: #FFFFFF;
    border-color: var(--color-navy);
}

.privacy-tiers-explainer {
    background-color: var(--color-paper);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: var(--card-padding);
    margin-top: var(--space-xl);
    max-width: 100%;
    box-sizing: border-box;
}

.tier-card {
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 1.25rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    max-width: 100%;
    box-sizing: border-box;
}

.tier-icon {
    color: var(--color-navy);
    margin-bottom: 0.5rem;
}

.tier-subtitle {
    font-size: 0.82rem;
    font-weight: 600;
    font-style: italic;
    color: var(--color-navy);
    margin-bottom: 0.5rem;
}

.privacy-pill {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    font-size: 0.72rem;
    font-weight: 600;
    padding: 0.25rem 0.5rem;
    border-radius: var(--radius-sm);
    margin-top: auto;
}

.privacy-pill.badge-public { background: rgba(16, 38, 83, 0.1); color: var(--color-navy); }
.privacy-pill.badge-semi { background: rgba(199, 168, 75, 0.15); color: #875218; }
.privacy-pill.badge-anon { background: rgba(94, 98, 112, 0.12); color: var(--color-muted); }

/* Dedicated Contribution Tracker Hero & Container Support */
.tracker-hero-section {
    padding: clamp(40px, 6vw, var(--space-xl)) 0 var(--space-lg);
    border-bottom: 1px solid var(--color-border);
    background-color: var(--color-background);
    text-align: center;
}

.tracker-hero-inner {
    max-width: 820px;
    margin: 0 auto;
}

.tracker-main-card {
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: clamp(1.25rem, 3vw, var(--card-padding));
    box-shadow: var(--shadow-card);
    margin-bottom: var(--space-xl);
    max-width: 100%;
    box-sizing: border-box;
}

.tracker-fund-amount-box {
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 0.85rem 1.25rem;
    text-align: right;
    min-width: 220px;
}

@media (max-width: 640px) {
    .tracker-fund-amount-box {
        text-align: left;
        width: 100%;
    }
}

.tracker-amount-large {
    font-size: clamp(1.6rem, 3.5vw, 2.2rem);
    font-weight: 700;
    color: var(--color-navy);
    font-family: var(--font-display);
    line-height: 1.1;
    margin: 0.2rem 0;
}

.tracker-amount-sub {
    font-size: 0.84rem;
    color: var(--color-muted);
}

.tracker-metrics-4grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-sm);
    margin-top: var(--space-lg);
    max-width: 100%;
}

@media (min-width: 900px) {
    .tracker-metrics-4grid {
        grid-template-columns: repeat(4, 1fr);
        gap: var(--grid-gap);
    }
}

.metric-box {
    background-color: var(--color-background);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    padding: 1rem 1.15rem;
    text-align: center;
    display: flex;
    flex-direction: column;
    justify-content: center;
    transition: border-color 0.15s ease;
    max-width: 100%;
    box-sizing: border-box;
}

.metric-box:hover {
    border-color: var(--color-gold);
}

.metric-value {
    font-family: var(--font-display);
    font-size: clamp(1.3rem, 2.8vw, 1.8rem);
    font-weight: 700;
    color: var(--color-navy);
    line-height: 1.1;
    margin-bottom: 0.25rem;
}

.metric-label {
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--color-text);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    margin-bottom: 0.15rem;
}

.metric-sub {
    font-size: 0.78rem;
    color: var(--color-muted);
}

.security-guarantee-note {
    margin-top: 1.5rem;
    padding-top: 1rem;
    border-top: 1px solid var(--color-border);
    font-size: 0.85rem;
    color: var(--color-muted);
    text-align: center;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.supporter-roll-container {
    margin-top: var(--space-xl);
    background-color: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    padding: clamp(1.25rem, 3vw, var(--card-padding));
    box-shadow: var(--shadow-card);
}

.roll-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: var(--space-md);
    margin-bottom: var(--space-md);
}

.roll-filter-group {
    width: 100%;
    max-width: 320px;
}

@media (max-width: 640px) {
    .roll-filter-group {
        max-width: 100%;
    }
}

/* ==========================================================================
   Section Scroll Animations & Interactive Element Motion
   ========================================================================== */

/* Base Scroll Reveal Classes */
.reveal-on-scroll {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.75s cubic-bezier(0.16, 1, 0.3, 1), transform 0.75s cubic-bezier(0.16, 1, 0.3, 1);
    will-change: opacity, transform;
}

.reveal-on-scroll.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Staggered Children Animations */
.reveal-stagger-container .reveal-stagger-child {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
    transition-delay: calc(var(--stagger-index, 0) * 0.08s);
    will-change: opacity, transform;
}

.reveal-stagger-container.is-visible .reveal-stagger-child,
.reveal-stagger-child.is-visible {
    opacity: 1;
    transform: translateY(0);
}

/* Header Scroll Glass Elevation */
.site-header {
    transition: padding 0.3s ease, background-color 0.3s ease, box-shadow 0.3s ease;
}

.site-header.is-scrolled {
    box-shadow: 0 6px 22px rgba(16, 38, 83, 0.09);
    background: rgba(246, 241, 231, 0.98);
}

/* Interactive Card & Component Hover Micro-Animations */
.content-card, 
.hero-card, 
.supporter-badge-card, 
.kpi-mini-card, 
.metric-box, 
.then-now-card,
.tracker-spotlight-card,
.cta-banner {
    transition: transform 0.28s cubic-bezier(0.16, 1, 0.3, 1), box-shadow 0.28s ease, border-color 0.28s ease;
}

.content-card:hover, 
.hero-card:hover, 
.supporter-badge-card:hover, 
.then-now-card:hover {
    transform: translateY(-4px);
    box-shadow: 0 12px 28px rgba(16, 38, 83, 0.09);
    border-color: rgba(199, 168, 75, 0.5);
}

/* Timeline Node Interactive Effects */
.timeline-node {
    opacity: 0.75;
    transform: scale(0.98);
    transition: opacity 0.4s ease, transform 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.timeline-node.is-visible,
.timeline-node:hover {
    opacity: 1;
    transform: scale(1.02);
}

.timeline-dot {
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1), background-color 0.3s ease, box-shadow 0.3s ease;
}

.timeline-node:hover .timeline-dot {
    transform: scale(1.35);
    box-shadow: 0 0 0 5px rgba(199, 168, 75, 0.25);
}

/* Button & Interactive Control Micro-Animations */
.btn {
    transition: transform 0.2s cubic-bezier(0.16, 1, 0.3, 1), background-color 0.2s ease, border-color 0.2s ease, box-shadow 0.2s ease;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(16, 38, 83, 0.12);
}

.btn:active {
    transform: translateY(1px);
    box-shadow: 0 2px 6px rgba(16, 38, 83, 0.08);
}

/* Editorial Rule Expand Animation */
.editorial-rule {
    transform-origin: left center;
    transition: transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.editorial-rule-center {
    transform-origin: center center;
}

.reveal-on-scroll:not(.is-visible) .editorial-rule {
    transform: scaleX(0.2);
}

.reveal-on-scroll.is-visible .editorial-rule {
    transform: scaleX(1);
}

/* Accessibility: Respect Reduced Motion Preferences */
@media (prefers-reduced-motion: reduce) {
    .reveal-on-scroll,
    .reveal-stagger-child,
    .timeline-node,
    .editorial-rule {
        opacity: 1 !important;
        transform: none !important;
        transition: none !important;
    }
    
    .btn:hover,
    .content-card:hover,
    .hero-card:hover,
    .supporter-badge-card:hover,
    .then-now-card:hover {
        transform: none !important;
    }
}