/* ================================
   Dartmouth Swimming Alumni Archive
   Heritage Archive Aesthetic
   ================================ */

/* CSS Variables */
:root {
    /* Dartmouth Colors */
    --dartmouth-green: #00693E;
    --dartmouth-green-dark: #004d2e;
    --dartmouth-green-light: #008c52;
    --forest-green: #1a4731;
    --pine-green: #2d5a45;

    /* Accent Colors */
    --cream: #F5F1E8;
    --parchment: #EDE8DC;
    --aged-paper: #E8E2D4;
    --warm-white: #FDFCF9;
    --gold-accent: #C4A35A;
    --gold-light: #D4B86A;

    /* Text Colors */
    --text-dark: #1a1a1a;
    --text-medium: #4a4a4a;
    --text-light: #7a7a7a;
    --text-on-green: #ffffff;

    /* Pool/Water Accents */
    --pool-blue: #4A90A4;
    --pool-blue-light: #6BA5B8;
    --lane-line: rgba(255, 255, 255, 0.1);

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Typography */
    --font-display: 'Playfair Display', Georgia, serif;
    --font-body: 'Source Sans 3', -apple-system, sans-serif;

    /* Shadows */
    --shadow-subtle: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-card: 0 4px 20px rgba(0, 0, 0, 0.1);
    --shadow-elevated: 0 8px 40px rgba(0, 0, 0, 0.15);

    /* Borders */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;
}

/* Reset & Base */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-dark);
    background: var(--cream);
    min-height: 100vh;
    overflow-x: hidden;
}

/* Paper texture background */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    opacity: 0.03;
    pointer-events: none;
    z-index: 0;
}

/* Pool Lane Lines - Decorative Background */
.lane-lines {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 0;
    opacity: 0.4;
}

.lane {
    position: absolute;
    width: 3px;
    height: 100%;
    background: linear-gradient(
        to bottom,
        transparent 0%,
        var(--dartmouth-green) 2%,
        var(--dartmouth-green) 8%,
        transparent 10%,
        transparent 15%,
        var(--dartmouth-green) 17%,
        var(--dartmouth-green) 23%,
        transparent 25%,
        transparent 30%,
        var(--dartmouth-green) 32%,
        var(--dartmouth-green) 38%,
        transparent 40%,
        transparent 45%,
        var(--dartmouth-green) 47%,
        var(--dartmouth-green) 53%,
        transparent 55%,
        transparent 60%,
        var(--dartmouth-green) 62%,
        var(--dartmouth-green) 68%,
        transparent 70%,
        transparent 75%,
        var(--dartmouth-green) 77%,
        var(--dartmouth-green) 83%,
        transparent 85%,
        transparent 90%,
        var(--dartmouth-green) 92%,
        var(--dartmouth-green) 98%,
        transparent 100%
    );
    opacity: 0.08;
}

.lane:nth-child(1) { left: 10%; }
.lane:nth-child(2) { left: 30%; }
.lane:nth-child(3) { left: 50%; }
.lane:nth-child(4) { left: 70%; }
.lane:nth-child(5) { left: 90%; }

/* ================================
   Header
   ================================ */
.main-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: linear-gradient(135deg, var(--dartmouth-green) 0%, var(--forest-green) 100%);
    box-shadow: var(--shadow-elevated);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--space-md) var(--space-xl);
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-xl);
}

.logo-section {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.dartmouth-logo {
    width: 60px;
    height: auto;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.2));
    border-radius: var(--radius-sm);
}

.dartmouth-logo.small {
    width: 40px;
    height: auto;
}

.title-group h1 {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 600;
    color: var(--text-on-green);
    letter-spacing: 0.02em;
    line-height: 1.1;
}

.subtitle {
    font-family: var(--font-display);
    font-style: italic;
    font-size: 1rem;
    color: rgba(255,255,255,0.85);
    letter-spacing: 0.05em;
}

/* Navigation */
.main-nav {
    display: flex;
    gap: var(--space-sm);
}

.nav-btn {
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 500;
    color: rgba(255,255,255,0.8);
    background: transparent;
    border: 2px solid transparent;
    padding: var(--space-sm) var(--space-lg);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.nav-btn:hover {
    color: var(--text-on-green);
    background: rgba(255,255,255,0.1);
}

.nav-btn.active {
    color: var(--dartmouth-green);
    background: var(--warm-white);
    border-color: var(--warm-white);
}

/* User Section */
.user-section {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.user-name {
    font-size: 0.9rem;
    color: rgba(255,255,255,0.9);
}

.notification-btn {
    position: relative;
    width: 40px;
    height: 40px;
    background: rgba(255,255,255,0.1);
    border: none;
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
}

.notification-btn svg {
    width: 20px;
    height: 20px;
    color: var(--text-on-green);
}

.notification-btn:hover {
    background: rgba(255,255,255,0.2);
    transform: scale(1.05);
}

.notification-badge {
    position: absolute;
    top: -2px;
    right: -2px;
    width: 18px;
    height: 18px;
    background: var(--gold-accent);
    color: var(--text-dark);
    font-size: 0.7rem;
    font-weight: 600;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* ================================
   Main Content
   ================================ */
.main-content {
    position: relative;
    z-index: 1;
    min-height: calc(100vh - 200px);
}

.view {
    display: none;
    animation: fadeIn 0.4s ease;
}

.view.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* ================================
   Timeline View
   ================================ */
.timeline-header {
    text-align: center;
    padding: var(--space-3xl) var(--space-xl) var(--space-xl);
    background: linear-gradient(180deg, rgba(0,105,62,0.05) 0%, transparent 100%);
}

.timeline-header h2 {
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--dartmouth-green);
    margin-bottom: var(--space-md);
}

.archive-intro {
    font-size: 1.1rem;
    color: var(--text-medium);
    max-width: 600px;
    margin: 0 auto;
}

/* Decade Navigation */
.decade-nav {
    position: relative;
    padding: var(--space-xl) var(--space-xl) var(--space-2xl);
    overflow-x: auto;
}

.decade-track {
    display: flex;
    justify-content: center;
    gap: var(--space-lg);
    position: relative;
    z-index: 2;
    min-width: max-content;
    padding: 0 var(--space-xl);
}

.decade-line {
    position: absolute;
    left: var(--space-xl);
    right: var(--space-xl);
    top: 50%;
    height: 4px;
    background: linear-gradient(90deg,
        transparent,
        var(--dartmouth-green) 10%,
        var(--dartmouth-green) 90%,
        transparent
    );
    opacity: 0.2;
    z-index: 1;
}

.decade-marker {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-md) var(--space-lg);
    background: var(--warm-white);
    border: 2px solid var(--parchment);
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
    position: relative;
}

.decade-marker::before {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    width: 12px;
    height: 12px;
    background: var(--parchment);
    border: 3px solid var(--cream);
    border-radius: 50%;
    margin-top: var(--space-sm);
    transition: all var(--transition-normal);
}

.decade-marker:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-card);
    border-color: var(--dartmouth-green-light);
}

.decade-marker:hover::before {
    background: var(--dartmouth-green-light);
}

.decade-marker.active {
    background: var(--dartmouth-green);
    border-color: var(--dartmouth-green);
    transform: translateY(-4px);
    box-shadow: var(--shadow-elevated);
}

.decade-marker.active::before {
    background: var(--dartmouth-green);
    border-color: var(--dartmouth-green-light);
    width: 16px;
    height: 16px;
}

.decade-year {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--dartmouth-green);
    transition: color var(--transition-normal);
}

.decade-marker.active .decade-year {
    color: var(--text-on-green);
}

.decade-count {
    font-size: 0.75rem;
    color: var(--text-light);
    transition: color var(--transition-normal);
}

.decade-marker.active .decade-count {
    color: rgba(255,255,255,0.8);
}

/* Decade Content */
.decade-content {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 var(--space-xl) var(--space-3xl);
}

.decade-hero {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-2xl);
    background: linear-gradient(135deg, var(--dartmouth-green) 0%, var(--pine-green) 100%);
    border-radius: var(--radius-xl);
    margin-bottom: var(--space-2xl);
    position: relative;
    overflow: hidden;
}

.decade-hero::before {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    bottom: 0;
    width: 50%;
    background: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath fill='rgba(255,255,255,0.03)' d='M44.7,-76.4C58.8,-69.2,71.8,-59.1,79.6,-45.8C87.4,-32.5,90,-16.3,88.5,-1C87,14.4,81.3,28.7,73.2,41.5C65.1,54.3,54.5,65.5,41.6,73.1C28.7,80.7,13.4,84.6,-1.2,86.6C-15.8,88.6,-31.5,88.6,-44.5,82.2C-57.5,75.8,-67.6,63,-75.1,49C-82.6,35,-87.4,19.8,-87.6,-0.1C-87.9,-20.1,-83.5,-40.1,-73.5,-55.2C-63.5,-70.2,-47.8,-80.2,-32.1,-86.4C-16.3,-92.6,-0.6,-95,14.3,-91.5C29.3,-88,30.6,-83.6,44.7,-76.4Z' transform='translate(100 100)'/%3E%3C/svg%3E") no-repeat center;
    background-size: cover;
    opacity: 0.5;
}

.decade-title-card {
    position: relative;
    z-index: 1;
}

.decade-era {
    font-family: var(--font-display);
    font-style: italic;
    font-size: 1.25rem;
    color: rgba(255,255,255,0.7);
    display: block;
}

.decade-display {
    font-family: var(--font-display);
    font-size: 4rem;
    font-weight: 700;
    color: var(--text-on-green);
    line-height: 1;
    margin: var(--space-sm) 0;
    text-shadow: 0 2px 4px rgba(0,0,0,0.2);
}

.decade-tagline {
    font-family: var(--font-display);
    font-style: italic;
    font-size: 1.1rem;
    color: var(--gold-accent);
}

.decade-stats {
    display: flex;
    gap: var(--space-2xl);
    position: relative;
    z-index: 1;
}

.stat {
    text-align: center;
}

.stat-number {
    display: block;
    font-family: var(--font-display);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-on-green);
}

.stat-label {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.7);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* Archive Grid */
.archive-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
}

/* Memory Cards */
.memory-card {
    background: var(--warm-white);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-card);
    transition: all var(--transition-normal);
    cursor: pointer;
    border: 1px solid rgba(0,0,0,0.05);
}

.memory-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-elevated);
}

.memory-card.featured {
    grid-column: span 2;
}

.memory-card.tall {
    grid-row: span 2;
}

/* Photo Cards */
.photo-card .card-image {
    position: relative;
    aspect-ratio: 4/3;
    overflow: hidden;
}

.memory-card.featured .card-image {
    aspect-ratio: 16/9;
}

.placeholder-image {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 3rem;
}

.placeholder-image.pool-scene {
    background: linear-gradient(135deg, var(--pool-blue) 0%, var(--pool-blue-light) 100%);
}

.placeholder-image.team-photo {
    background: linear-gradient(135deg, var(--dartmouth-green) 0%, var(--pine-green) 100%);
}

.placeholder-image.medal-ceremony {
    background: linear-gradient(135deg, var(--gold-accent) 0%, var(--gold-light) 100%);
}

.placeholder-image.dorm-life {
    background: linear-gradient(135deg, #8B7355 0%, #A08060 100%);
}

.image-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, transparent 50%, rgba(0,0,0,0.6) 100%);
    padding: var(--space-md);
    display: flex;
    align-items: flex-end;
}

/* Story Cards */
.story-card {
    padding: var(--space-lg);
    background: linear-gradient(135deg, var(--parchment) 0%, var(--aged-paper) 100%);
    position: relative;
}

.story-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noiseFilter'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.8' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noiseFilter)'/%3E%3C/svg%3E");
    opacity: 0.05;
    pointer-events: none;
}

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

.story-icon {
    font-size: 1.5rem;
}

/* Year Badge */
.year-badge {
    display: inline-block;
    background: var(--dartmouth-green);
    color: var(--text-on-green);
    font-family: var(--font-display);
    font-size: 0.85rem;
    font-weight: 600;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
}

.year-badge.large {
    font-size: 1rem;
    padding: var(--space-sm) var(--space-md);
}

/* Card Content */
.card-content {
    padding: var(--space-lg);
}

.story-card .card-content {
    padding: 0;
    position: relative;
    z-index: 1;
}

.card-content h4 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: var(--space-sm);
    line-height: 1.3;
}

.memory-excerpt {
    font-size: 0.95rem;
    color: var(--text-medium);
    line-height: 1.6;
    margin-bottom: var(--space-md);
}

.story-card.tall .memory-excerpt {
    white-space: pre-line;
}

.card-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: var(--space-md);
    border-top: 1px solid rgba(0,0,0,0.08);
}

.contributor {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    font-size: 0.85rem;
    color: var(--text-medium);
}

.avatar {
    width: 32px;
    height: 32px;
    background: var(--dartmouth-green);
    color: var(--text-on-green);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.75rem;
    font-weight: 600;
}

.avatar.large {
    width: 48px;
    height: 48px;
    font-size: 1rem;
}

.avatar.small {
    width: 28px;
    height: 28px;
    font-size: 0.7rem;
}

.reactions {
    display: flex;
    gap: var(--space-xs);
}

.reaction-btn {
    background: rgba(0,0,0,0.05);
    border: none;
    padding: var(--space-xs) var(--space-sm);
    border-radius: 20px;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.reaction-btn:hover {
    background: rgba(0,0,0,0.1);
    transform: scale(1.05);
}

.reaction-btn.active {
    background: var(--dartmouth-green);
    color: var(--text-on-green);
}

/* Load More */
.load-more-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    width: 100%;
    max-width: 300px;
    margin: var(--space-2xl) auto 0;
    padding: var(--space-md) var(--space-xl);
    background: transparent;
    border: 2px solid var(--dartmouth-green);
    color: var(--dartmouth-green);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--radius-lg);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.load-more-btn svg {
    width: 20px;
    height: 20px;
    transition: transform var(--transition-normal);
}

.load-more-btn:hover {
    background: var(--dartmouth-green);
    color: var(--text-on-green);
}

.load-more-btn:hover svg {
    transform: translateY(4px);
}

/* ================================
   Contribute View
   ================================ */
.contribute-container {
    max-width: 800px;
    margin: 0 auto;
    padding: var(--space-3xl) var(--space-xl);
}

.contribute-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.contribute-header h2 {
    font-family: var(--font-display);
    font-size: 2.5rem;
    color: var(--dartmouth-green);
    margin-bottom: var(--space-sm);
}

.contribute-header p {
    font-size: 1.1rem;
    color: var(--text-medium);
}

/* Form Styles */
.contribute-form {
    background: var(--warm-white);
    padding: var(--space-2xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-card);
}

.form-section {
    margin-bottom: var(--space-xl);
}

.form-label {
    display: block;
    font-weight: 500;
    color: var(--text-dark);
    margin-bottom: var(--space-sm);
}

/* Memory Type Selector */
.memory-type-selector {
    display: flex;
    gap: var(--space-md);
}

.type-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-lg);
    background: var(--cream);
    border: 2px solid var(--parchment);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.type-btn:hover {
    border-color: var(--dartmouth-green-light);
    transform: translateY(-2px);
}

.type-btn.active {
    background: var(--dartmouth-green);
    border-color: var(--dartmouth-green);
}

.type-icon {
    font-size: 2rem;
}

.type-name {
    font-weight: 500;
    color: var(--text-dark);
    transition: color var(--transition-normal);
}

.type-btn.active .type-name {
    color: var(--text-on-green);
}

/* Form Inputs */
.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-md);
    background: var(--cream);
    border: 2px solid var(--parchment);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 1rem;
    color: var(--text-dark);
    transition: all var(--transition-normal);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--dartmouth-green);
    background: var(--warm-white);
}

.form-input::placeholder,
.form-textarea::placeholder {
    color: var(--text-light);
}

.form-textarea {
    min-height: 150px;
    resize: vertical;
}

.form-textarea.small {
    min-height: 80px;
}

.char-count {
    display: block;
    text-align: right;
    font-size: 0.8rem;
    color: var(--text-light);
    margin-top: var(--space-xs);
}

/* Upload Zone */
.upload-zone {
    border: 2px dashed var(--dartmouth-green-light);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    text-align: center;
    cursor: pointer;
    transition: all var(--transition-normal);
    background: rgba(0,105,62,0.02);
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--dartmouth-green);
    background: rgba(0,105,62,0.05);
}

.upload-icon {
    width: 48px;
    height: 48px;
    color: var(--dartmouth-green);
    margin-bottom: var(--space-md);
}

.upload-zone p {
    font-size: 1rem;
    color: var(--text-medium);
    margin-bottom: var(--space-xs);
}

.upload-link {
    color: var(--dartmouth-green);
    font-weight: 500;
    text-decoration: underline;
}

.upload-hint {
    font-size: 0.85rem;
    color: var(--text-light);
}

.uploaded-preview {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-md);
    margin-top: var(--space-md);
}

.preview-item {
    position: relative;
    width: 100px;
    height: 100px;
    border-radius: var(--radius-md);
    overflow: hidden;
}

.preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.preview-remove {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 24px;
    height: 24px;
    background: rgba(0,0,0,0.7);
    color: white;
    border: none;
    border-radius: 50%;
    cursor: pointer;
    font-size: 14px;
    line-height: 1;
}

/* Tags */
.tags-container {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-sm);
    margin-top: var(--space-sm);
}

.tag {
    display: inline-flex;
    align-items: center;
    gap: var(--space-xs);
    padding: var(--space-xs) var(--space-sm);
    background: var(--dartmouth-green);
    color: var(--text-on-green);
    border-radius: 20px;
    font-size: 0.85rem;
}

.tag-remove {
    background: none;
    border: none;
    color: rgba(255,255,255,0.7);
    cursor: pointer;
    font-size: 1rem;
    padding: 0;
    line-height: 1;
}

.tag-remove:hover {
    color: white;
}

/* Form Actions */
.form-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: flex-end;
    padding-top: var(--space-xl);
    border-top: 1px solid var(--parchment);
}

/* Buttons */
.btn-primary,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    padding: var(--space-md) var(--space-xl);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn-primary {
    background: var(--dartmouth-green);
    color: var(--text-on-green);
    border: 2px solid var(--dartmouth-green);
}

.btn-primary:hover {
    background: var(--dartmouth-green-dark);
    border-color: var(--dartmouth-green-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-card);
}

.btn-primary:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    background: transparent;
    color: var(--dartmouth-green);
    border: 2px solid var(--dartmouth-green);
}

.btn-secondary:hover {
    background: rgba(0,105,62,0.1);
}

.btn-primary svg,
.btn-secondary svg {
    width: 18px;
    height: 18px;
}

.full-width {
    width: 100%;
    justify-content: center;
}

/* ================================
   Invite View
   ================================ */
.invite-container {
    max-width: 1000px;
    margin: 0 auto;
    padding: var(--space-3xl) var(--space-xl);
}

.invite-header {
    text-align: center;
    margin-bottom: var(--space-2xl);
}

.invite-header h2 {
    font-family: var(--font-display);
    font-size: 2.5rem;
    color: var(--dartmouth-green);
    margin-bottom: var(--space-sm);
}

.invite-header p {
    font-size: 1.1rem;
    color: var(--text-medium);
}

.invite-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--space-2xl);
}

.invite-form-section,
.invite-stats-section {
    background: var(--warm-white);
    padding: var(--space-xl);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-card);
}

.invite-form-section h3,
.invite-stats-section h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--dartmouth-green);
    margin-bottom: var(--space-lg);
}

/* Email Input */
.email-input-group {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.email-input-group .form-input {
    flex: 1;
}

.add-email-btn {
    padding: var(--space-md) var(--space-lg);
    background: var(--dartmouth-green);
    color: var(--text-on-green);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.add-email-btn:hover {
    background: var(--dartmouth-green-dark);
}

/* Email List */
.email-list {
    display: flex;
    flex-direction: column;
    gap: var(--space-sm);
    margin-bottom: var(--space-lg);
    max-height: 200px;
    overflow-y: auto;
}

.email-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-sm) var(--space-md);
    background: var(--cream);
    border-radius: var(--radius-md);
}

.email-item span {
    font-size: 0.95rem;
    color: var(--text-dark);
}

.remove-email {
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 0;
    line-height: 1;
}

.remove-email:hover {
    color: #dc3545;
}

/* Community Stats */
.community-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.community-stat {
    text-align: center;
    padding: var(--space-md);
    background: var(--cream);
    border-radius: var(--radius-md);
}

.community-stat .stat-number {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 700;
    color: var(--dartmouth-green);
}

.community-stat .stat-label {
    font-size: 0.75rem;
    color: var(--text-medium);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Recent Joins */
.recent-joins,
.pending-invites {
    margin-bottom: var(--space-xl);
}

.recent-joins h4,
.pending-invites h4 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    color: var(--text-dark);
    margin-bottom: var(--space-md);
}

.joins-list,
.pending-list {
    list-style: none;
}

.join-item {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--parchment);
}

.join-item:last-child {
    border-bottom: none;
}

.join-info {
    display: flex;
    flex-direction: column;
}

.join-name {
    font-weight: 500;
    color: var(--text-dark);
}

.join-time {
    font-size: 0.8rem;
    color: var(--text-light);
}

.pending-item {
    display: flex;
    justify-content: space-between;
    padding: var(--space-sm) 0;
    border-bottom: 1px solid var(--parchment);
}

.pending-item:last-child {
    border-bottom: none;
}

.pending-email {
    font-size: 0.95rem;
    color: var(--text-dark);
}

.pending-status {
    font-size: 0.8rem;
    color: var(--text-light);
}

/* ================================
   Modals
   ================================ */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0,0,0,0.6);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-normal);
    padding: var(--space-xl);
}

.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal {
    background: var(--warm-white);
    border-radius: var(--radius-xl);
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    transform: translateY(20px);
    transition: transform var(--transition-normal);
}

.modal-overlay.active .modal {
    transform: translateY(0);
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-lg) var(--space-xl);
    border-bottom: 1px solid var(--parchment);
}

.modal-header h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--dartmouth-green);
}

.modal-close {
    width: 36px;
    height: 36px;
    background: var(--cream);
    border: none;
    border-radius: 50%;
    font-size: 1.5rem;
    color: var(--text-medium);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.modal-close:hover {
    background: var(--dartmouth-green);
    color: var(--text-on-green);
}

.modal-content {
    padding: var(--space-xl);
}

.modal-intro {
    color: var(--text-medium);
    margin-bottom: var(--space-lg);
}

/* Notification Options */
.notification-options {
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
    margin-bottom: var(--space-xl);
}

.notification-option {
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
    padding: var(--space-md);
    background: var(--cream);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.notification-option:hover {
    background: var(--parchment);
}

.notification-option input[type="checkbox"] {
    width: 20px;
    height: 20px;
    accent-color: var(--dartmouth-green);
    margin-top: 2px;
}

.option-content {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.option-title {
    font-weight: 500;
    color: var(--text-dark);
}

.option-desc {
    font-size: 0.85rem;
    color: var(--text-light);
}

.email-frequency {
    margin-bottom: var(--space-lg);
}

.modal-actions {
    display: flex;
    gap: var(--space-md);
    justify-content: flex-end;
    padding: var(--space-lg) var(--space-xl);
    border-top: 1px solid var(--parchment);
}

/* Memory Detail Modal */
.memory-detail-modal {
    max-width: 900px;
    position: relative;
}

.memory-detail-modal .modal-close {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    z-index: 10;
    background: rgba(255,255,255,0.9);
}

.memory-detail-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
}

.memory-image-large {
    aspect-ratio: 1;
}

.memory-image-large .placeholder-image {
    height: 100%;
}

.memory-image-large .placeholder-image.large {
    font-size: 5rem;
}

.memory-detail-info {
    padding: var(--space-xl);
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.memory-detail-info h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    color: var(--text-dark);
}

.contributor-detail {
    display: flex;
    align-items: center;
    gap: var(--space-md);
}

.contributor-info {
    display: flex;
    flex-direction: column;
}

.contributor-name {
    font-weight: 500;
    color: var(--text-dark);
}

.contributor-role {
    font-size: 0.85rem;
    color: var(--text-light);
}

.memory-full-story {
    color: var(--text-medium);
    line-height: 1.7;
}

.memory-full-story p {
    margin-bottom: var(--space-md);
}

.memory-full-story p:last-child {
    margin-bottom: 0;
}

.memory-reactions-detail {
    display: flex;
    gap: var(--space-sm);
}

.add-reaction {
    background: var(--cream) !important;
    border: 2px dashed var(--parchment) !important;
}

/* Comments */
.memory-comments {
    border-top: 1px solid var(--parchment);
    padding-top: var(--space-lg);
}

.memory-comments h4 {
    font-family: var(--font-display);
    font-size: 1.1rem;
    margin-bottom: var(--space-md);
}

.comment {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-md);
}

.comment-content {
    background: var(--cream);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    flex: 1;
}

.comment-author {
    font-weight: 500;
    font-size: 0.85rem;
    color: var(--text-dark);
    display: block;
    margin-bottom: 2px;
}

.comment-content p {
    font-size: 0.9rem;
    color: var(--text-medium);
    margin: 0;
}

.comment-form {
    display: flex;
    gap: var(--space-sm);
    margin-top: var(--space-md);
}

.comment-input {
    flex: 1;
    padding: var(--space-sm) var(--space-md);
    border: 2px solid var(--parchment);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 0.9rem;
}

.comment-input:focus {
    outline: none;
    border-color: var(--dartmouth-green);
}

.comment-submit {
    padding: var(--space-sm) var(--space-md);
    background: var(--dartmouth-green);
    color: var(--text-on-green);
    border: none;
    border-radius: var(--radius-md);
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-fast);
}

.comment-submit:hover {
    background: var(--dartmouth-green-dark);
}

/* ================================
   Toast Notifications
   ================================ */
.toast-container {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    z-index: 1100;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-md) var(--space-lg);
    background: var(--warm-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-elevated);
    border-left: 4px solid var(--dartmouth-green);
    animation: slideIn 0.3s ease, fadeOut 0.3s ease 4.7s forwards;
    max-width: 400px;
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@keyframes fadeOut {
    to {
        opacity: 0;
        transform: translateX(50%);
    }
}

.toast-icon {
    font-size: 1.25rem;
}

.toast-content {
    flex: 1;
}

.toast-title {
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 2px;
}

.toast-message {
    font-size: 0.85rem;
    color: var(--text-medium);
}

.toast-close {
    background: none;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 0;
}

.toast-close:hover {
    color: var(--text-dark);
}

/* ================================
   Footer
   ================================ */
.main-footer {
    background: var(--dartmouth-green);
    padding: var(--space-2xl);
    text-align: center;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
}

.footer-logo {
    margin-bottom: var(--space-md);
}

.footer-logo .dartmouth-logo {
    opacity: 0.7;
}

.footer-tagline {
    font-family: var(--font-display);
    font-style: italic;
    font-size: 1.1rem;
    color: rgba(255,255,255,0.9);
    margin-bottom: var(--space-sm);
}

.footer-copyright {
    font-size: 0.85rem;
    color: rgba(255,255,255,0.6);
}

/* ================================
   Authentication Modal
   ================================ */
.auth-modal {
    max-width: 420px;
}

/* Google Sign In Button */
.btn-google {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    width: 100%;
    padding: var(--space-md);
    background: var(--warm-white);
    border: 2px solid var(--parchment);
    border-radius: var(--radius-md);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-dark);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn-google:hover {
    background: var(--cream);
    border-color: var(--text-light);
    box-shadow: var(--shadow-subtle);
}

.google-icon {
    width: 20px;
    height: 20px;
}

.auth-divider {
    display: flex;
    align-items: center;
    margin: var(--space-lg) 0;
}

.auth-divider::before,
.auth-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--parchment);
}

.auth-divider span {
    padding: 0 var(--space-md);
    color: var(--text-light);
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.auth-tabs {
    display: flex;
    gap: var(--space-sm);
    margin-bottom: var(--space-xl);
    border-bottom: 2px solid var(--parchment);
    padding-bottom: var(--space-sm);
}

.auth-tab {
    flex: 1;
    padding: var(--space-sm) var(--space-md);
    background: transparent;
    border: none;
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 500;
    color: var(--text-light);
    cursor: pointer;
    transition: all var(--transition-normal);
    border-radius: var(--radius-sm);
}

.auth-tab:hover {
    color: var(--text-dark);
    background: var(--cream);
}

.auth-tab.active {
    color: var(--dartmouth-green);
    background: rgba(0, 105, 62, 0.1);
}

.auth-form {
    display: none;
}

.auth-form.active {
    display: block;
}

.auth-form .form-section {
    margin-bottom: var(--space-lg);
}

.auth-link {
    text-align: center;
    margin-top: var(--space-lg);
    font-size: 0.9rem;
}

.auth-link a {
    color: var(--dartmouth-green);
    text-decoration: none;
    font-weight: 500;
}

.auth-link a:hover {
    text-decoration: underline;
}

.form-intro {
    color: var(--text-medium);
    margin-bottom: var(--space-lg);
    line-height: 1.5;
}

/* Auth state body classes */
body.unauthenticated .requires-auth {
    display: none;
}

body.authenticated .requires-no-auth {
    display: none;
}

/* ================================
   Responsive Design
   ================================ */
@media (max-width: 1200px) {
    .archive-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .memory-card.featured {
        grid-column: span 2;
    }
}

@media (max-width: 900px) {
    .header-content {
        flex-wrap: wrap;
        gap: var(--space-md);
    }

    .main-nav {
        order: 3;
        width: 100%;
        justify-content: center;
    }

    .decade-hero {
        flex-direction: column;
        text-align: center;
        gap: var(--space-xl);
    }

    .invite-content {
        grid-template-columns: 1fr;
    }

    .memory-detail-content {
        grid-template-columns: 1fr;
    }

    .memory-image-large {
        aspect-ratio: 16/9;
    }
}

@media (max-width: 768px) {
    .archive-grid {
        grid-template-columns: 1fr;
    }

    .memory-card.featured,
    .memory-card.tall {
        grid-column: span 1;
        grid-row: span 1;
    }

    .decade-display {
        font-size: 3rem;
    }

    .decade-stats {
        gap: var(--space-lg);
    }

    .stat-number {
        font-size: 1.75rem;
    }

    .community-stats {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 600px) {
    .header-content {
        padding: var(--space-md);
    }

    .title-group h1 {
        font-size: 1.25rem;
    }

    .subtitle {
        font-size: 0.85rem;
    }

    .nav-btn {
        padding: var(--space-sm);
        font-size: 0.85rem;
    }

    .user-name {
        display: none;
    }

    .decade-track {
        justify-content: flex-start;
        padding: 0 var(--space-md);
    }

    .timeline-header h2,
    .contribute-header h2,
    .invite-header h2 {
        font-size: 2rem;
    }

    .memory-type-selector {
        flex-direction: column;
    }

    .form-actions {
        flex-direction: column;
    }

    .form-actions button {
        width: 100%;
        justify-content: center;
    }
}

/* ================================
   Animations
   ================================ */
@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

.notification-badge {
    animation: pulse 2s infinite;
}

/* Staggered card animations on load */
.memory-card {
    opacity: 0;
    animation: cardFadeIn 0.5s ease forwards;
}

.memory-card:nth-child(1) { animation-delay: 0.1s; }
.memory-card:nth-child(2) { animation-delay: 0.2s; }
.memory-card:nth-child(3) { animation-delay: 0.3s; }
.memory-card:nth-child(4) { animation-delay: 0.4s; }
.memory-card:nth-child(5) { animation-delay: 0.5s; }
.memory-card:nth-child(6) { animation-delay: 0.6s; }

@keyframes cardFadeIn {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Focus styles for accessibility */
:focus-visible {
    outline: 3px solid var(--dartmouth-green-light);
    outline-offset: 2px;
}

/* Print styles */
@media print {
    .main-header,
    .main-footer,
    .lane-lines,
    .notification-btn,
    .load-more-btn,
    .modal-overlay {
        display: none !important;
    }

    body {
        background: white;
    }

    .memory-card {
        break-inside: avoid;
        box-shadow: none;
        border: 1px solid #ddd;
    }
}