/* 
  Minimal Portfolio - Single Page Design
  Clean, Technical, Modern
*/

:root {
    /* Color Palette - Default Dark (Slate) */
    --bg-dark: #0f172a;
    --bg-card: #1e293b;
    --bg-card-hover: #334155;
    --border-color: #334155;

    --text-main: #f8fafc;
    --text-muted: #94a3b8;

    --accent: #38bdf8;
    --accent-dim: rgba(56, 189, 248, 0.15);

    /* Aesthetic Elements */
    --bg-grid-color: rgba(255, 255, 255, 0.02);
    --bg-glass: rgba(30, 41, 59, 0.4);
    --border-glass: rgba(255, 255, 255, 0.04);

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', Consolas, Monaco, monospace;

    /* Spacing System */
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 1rem;
    --space-4: 1.5rem;
    --space-5: 2rem;
    --space-6: 3rem;
    --space-8: 4rem;

    /* Layout Constraints */
    --max-width: 1000px;
}

/* Theme: Light & Crisp */
body.theme-light {
    --bg-dark: #f8fafc;
    --bg-card: #ffffff;
    --bg-card-hover: #f1f5f9;
    --border-color: #e2e8f0;

    --text-main: #0f172a;
    --text-muted: #64748b;

    --accent: #0ea5e9;
    --accent-dim: rgba(14, 165, 233, 0.15);

    --bg-grid-color: rgba(15, 23, 42, 0.04);
    --bg-glass: rgba(255, 255, 255, 0.95);
    --border-glass: rgba(15, 23, 42, 0.12);
}

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

html,
body {
    width: 100%;
    height: 100%;
    overflow: hidden;
    font-size: 16px;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-dark);
    color: var(--text-main);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

/* Typography Base */
h1, h2, h3, h4, h5, h6 {
    line-height: 1.2;
    font-weight: 500;
    letter-spacing: -0.02em;
    color: var(--text-main);
}

a {
    color: var(--text-main);
    text-decoration: none;
    transition: color 0.2s ease;
}

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

p {
    margin-bottom: var(--space-4);
    color: var(--text-muted);
}

/* Subtle Grid Background Effect
   Creates a fixed-position decorative grid overlay behind all content */
.bg-grid {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 0;
    background-image:
        linear-gradient(to right, var(--bg-grid-color) 1px, transparent 1px),
        linear-gradient(to bottom, var(--bg-grid-color) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
}

/* Layout Container */
.layout-container {
    width: 100%;
    height: 100vh;
    padding: var(--space-3) var(--space-5);
    z-index: 10;
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

/* Header */
.site-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--space-3) 0;
    flex-shrink: 0;
    position: fixed;
    top: var(--space-3);
    left: var(--space-5);
    right: var(--space-5);
    z-index: 1002;
}

.site-name {
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
}

.site-name:hover {
    transform: scale(1.15);
}

.site-name .profile-pic {
    width: 4.5rem;
    height: 4.5rem;
    border-radius: 50%;
    object-fit: cover;
    border: 1.5px solid var(--border-color);
    transition: all 0.3s ease;
}

.site-name:hover .profile-pic {
    border-color: var(--accent);
}

.site-nav {
    display: flex;
    gap: var(--space-3);
    align-items: center;
}

.nav-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    font-family: var(--font-sans);
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    padding: 0.5rem 1rem;
    text-align: right;
    margin-bottom: var(--space-3);
    border-radius: 6px;
}

.nav-btn:hover {
    color: var(--accent);
    background: var(--bg-card);
    border-color: var(--accent);
    transform: translateY(-2px);
}

/* Main Content Area */
.main-content {
    flex-grow: 1;
    position: relative;
    overflow: hidden;
    display: flex;
    flex-direction: column;
    gap: var(--space-6);
    padding-top: calc(var(--space-3) * 3);
}

/* Center Content Panel */
.center-panel {
    padding: var(--space-6);
    max-width: 800px;
    margin: 0 auto;
    transition: opacity 0.3s ease, transform 0.3s ease;
}

.center-panel.fade-out {
    opacity: 0;
    transform: translateY(10px);
}

.center-panel.fade-in {
    opacity: 1;
    transform: translateY(0);
}

/* Intro Content Styles */
.intro-content {
    text-align: center;
}

.intro-tagline {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent);
    letter-spacing: 0.1em;
    text-transform: uppercase;
    margin-bottom: var(--space-4);
}

.intro-name {
    font-family: 'DM Sans', 'Space Grotesk', var(--font-sans);
    font-size: 2.5rem;
    font-weight: 500;
    color: var(--text-main);
    margin-bottom: var(--space-2);
    letter-spacing: 0.005em;
}

.intro-role {
    font-family: 'Space Grotesk', var(--font-sans);
    font-size: 1.25rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: var(--space-5);
    letter-spacing: -0.01em;
}

.intro-message {
    font-size: clamp(1.5rem, 4vw, 2.75rem);
    font-weight: 400;
    color: var(--text-main);
    line-height: 1.3;
    margin-bottom: var(--space-4);
}

.intro-subtitle {
    font-size: 1.125rem;
    color: var(--text-muted);
    line-height: 1.6;
    margin-bottom: var(--space-6);
}

.project-tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    background: var(--bg-card);
    color: var(--accent);
    padding: 4px 12px;
    border-radius: 100px;
    border: 1px solid var(--border-color);
}

/* Projects Dropdown Backdrop
   Glass morphism effect: backdrop blur with dark overlay */
.dropdown-backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.3);
    backdrop-filter: blur(4px);
    z-index: 999;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}

.dropdown-backdrop:not(.hidden) {
    opacity: 1;
    visibility: visible;
}

/* Projects List */
.projects-dropdown {
    position: fixed;
    top: 6rem;
    right: var(--space-5);
    width: auto;
    max-width: 90vw;
    max-height: calc(100vh - 180px);
    overflow-y: auto;
    z-index: 1003;
    transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    background: var(--bg-glass);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-radius: 0.5rem;
    padding: var(--space-3);
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.projects-dropdown.hidden {
    opacity: 0;
    visibility: hidden;
    transform: translateY(-20px);
}

.dropdown-content {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.dropdown-item {
    padding: var(--space-1) 0;
    cursor: pointer;
    transition: all 0.2s ease;
    color: var(--text-main);
    font-size: clamp(0.9rem, 1.2vw, 1rem);
    line-height: 1.5;
    border-bottom: 1px solid transparent;
    opacity: 0;
    transform: translateX(-20px);
    animation: slideInItem 0.3s ease forwards;
    text-align: right;
    white-space: nowrap;
}

.dropdown-item:nth-child(1) { animation-delay: 0.05s; }
.dropdown-item:nth-child(2) { animation-delay: 0.1s; }
.dropdown-item:nth-child(3) { animation-delay: 0.15s; }
.dropdown-item:nth-child(4) { animation-delay: 0.2s; }
.dropdown-item:nth-child(5) { animation-delay: 0.25s; }
.dropdown-item:nth-child(6) { animation-delay: 0.3s; }
.dropdown-item:nth-child(7) { animation-delay: 0.35s; }
.dropdown-item:nth-child(8) { animation-delay: 0.4s; }
.dropdown-item:nth-child(9) { animation-delay: 0.45s; }
.dropdown-item:nth-child(10) { animation-delay: 0.5s; }

@keyframes slideInItem {
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.dropdown-item:hover {
    color: var(--accent);
}

/* Light mode specific dropdown styling for better contrast */
body.theme-light .projects-dropdown {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
}

body.theme-light .dropdown-item {
    color: #0f172a;
    font-weight: 500;
}

body.theme-light .dropdown-item:hover {
    background: rgba(14, 165, 233, 0.08);
    border-radius: 0.25rem;
}

/* Project Detail Overlay */
.project-detail-overlay {
    position: fixed;
    inset: 0;
    z-index: 1004;
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.project-detail-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.overlay-backdrop {
    position: absolute;
    inset: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(8px);
}

.overlay-content {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    max-width: 900px;
    max-height: 85vh;
    width: 90%;
    overflow-y: auto;
    z-index: 1005;
    transform: scale(0.95);
    transition: transform 0.3s ease;
}

.project-detail-overlay.active .overlay-content {
    transform: scale(1);
}

.overlay-close {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    background: var(--bg-card-hover);
    border: 1px solid var(--border-color);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-main);
    transition: all 0.2s ease;
    z-index: 1004;
}

.overlay-close:hover {
    background: var(--accent);
    color: var(--bg-dark);
    transform: rotate(90deg);
}

.project-detail-content {
    padding: var(--space-6);
}

.project-detail-title {
    font-size: 1.75rem;
    font-weight: 500;
    color: var(--text-main);
    margin-bottom: var(--space-4);
    padding-right: 4rem;
    line-height: 1.3;
}

.project-detail-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-2);
    margin-bottom: var(--space-5);
}

.project-detail-links {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-3);
    margin-bottom: var(--space-5);
}

.project-detail-link {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    padding: var(--space-2) var(--space-4);
    background: var(--bg-card-hover);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-main);
    font-size: 0.9rem;
    transition: all 0.2s ease;
}

.project-detail-link:hover {
    background: var(--accent-dim);
    border-color: var(--accent);
}

.project-detail-description {
    font-size: 0.975rem;
    line-height: 1.65;
    color: var(--text-muted);
    margin-bottom: var(--space-5);
}

.project-detail-images {
    display: flex;
    flex-direction: column;
    gap: var(--space-5);
}

.project-detail-images img {
    width: 100%;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
}

/* Skills Card Deck
   Container for skill cards with 3D perspective for depth effect */
.card-deck {
    position: relative;
    height: 18rem;
    display: flex;
    align-items: center;
    justify-content: center;
    perspective: 75rem;
    margin-top: var(--space-0);
    width: 100%;
    z-index: 1;
}

.card-deck.hidden {
    display: none !important;
}

.skill-card {
    position: absolute;
    width: 18rem;
    height: 14rem;
    background: var(--card-color, var(--bg-card));
    border: none;
    border-radius: 1rem;
    padding: var(--space-5);
    cursor: pointer;
    transition: all 0.5s cubic-bezier(0.34, 1.56, 0.64, 1);
    box-shadow: 0 0.8rem 2.5rem rgba(0, 0, 0, 0.35), 0 0.2rem 0.5rem rgba(0, 0, 0, 0.2);
    overflow: hidden;
    transform-style: preserve-3d;
}

.skill-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(0, 0, 0, 0) 0%, rgba(0, 0, 0, 0.08) 100%);
    border-radius: 1rem;
    pointer-events: none;
    z-index: 1;
}

.skill-card::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    border-radius: 1rem;
    pointer-events: none;
    z-index: 2;
}

/* Animated SVG patterns for each skill card type */
.skill-card[data-pattern="pattern-research"]::after {
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20"><circle cx="4" cy="4" r="1.5" fill="rgba(255,255,255,0.15)"/><circle cx="14" cy="14" r="1.5" fill="rgba(255,255,255,0.15)"/><circle cx="4" cy="14" r="1" fill="rgba(255,255,255,0.1)"/><circle cx="14" cy="4" r="1" fill="rgba(255,255,255,0.1)"/></svg>');
    animation: moveDiagonal 20s linear infinite;
}

.skill-card[data-pattern="pattern-planning"]::after {
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20"><rect x="0" y="0" width="8" height="8" fill="rgba(255,255,255,0.12)"/><rect x="10" y="10" width="8" height="8" fill="rgba(255,255,255,0.12)"/></svg>');
    animation: moveDiagonal 20s linear infinite;
}

.skill-card[data-pattern="pattern-development"]::after {
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20"><line x1="0" y1="20" x2="20" y2="0" stroke="rgba(255,255,255,0.15)" stroke-width="2"/><line x1="-5" y1="5" x2="5" y2="-5" stroke="rgba(255,255,255,0.15)" stroke-width="2"/><line x1="15" y1="25" x2="25" y2="15" stroke="rgba(255,255,255,0.15)" stroke-width="2"/></svg>');
    animation: moveSlashUp 20s linear infinite;
}

.skill-card[data-pattern="pattern-testing"]::after {
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="40" height="20"><path d="M0 10 Q10 5, 20 10 T40 10" stroke="rgba(255,255,255,0.15)" stroke-width="2" fill="none"/><path d="M0 15 Q10 12, 20 15 T40 15" stroke="rgba(255,255,255,0.08)" stroke-width="1" fill="none"/></svg>');
    animation: moveWaves 20s linear infinite;
}

.skill-card[data-pattern="pattern-optimization"]::after {
    background: url('data:image/svg+xml;utf8,<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20"><line x1="0" y1="0" x2="20" y2="20" stroke="rgba(255,255,255,0.15)" stroke-width="2"/><line x1="-5" y1="-5" x2="5" y2="5" stroke="rgba(255,255,255,0.15)" stroke-width="2"/><line x1="15" y1="15" x2="25" y2="25" stroke="rgba(255,255,255,0.15)" stroke-width="2"/></svg>');
    animation: moveSlashDown 20s linear infinite;
}

.skill-card > * {
    position: relative;
    z-index: 3;
}

.skill-card.expanding,
.skill-card.collapsing {
    transition: all 0.5s cubic-bezier(0.4, 0.0, 0.2, 1);
}

.skill-card.collapsing .skill-card-details {
    opacity: 0 !important;
    transition: opacity 0.2s ease !important;
}

.skill-card.collapsing .skill-card-title {
    transition: font-size 0.5s ease !important;
}

.skill-card.collapsing .card-close-btn {
    opacity: 0 !important;
    pointer-events: none !important;
    transition: opacity 0.2s ease !important;
}

/* Card Close Button */
.card-close-btn {
    position: absolute;
    top: var(--space-4);
    right: var(--space-4);
    width: 2rem;
    height: 2rem;
    background: transparent;
    border: 1px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: rgba(255, 255, 255, 0.9);
    font-size: 1rem;
    transition: all 0.3s ease;
    z-index: 10;
    opacity: 0;
    pointer-events: none;
    transform: scale(0.8);
}

.skill-card.expanded .card-close-btn {
    opacity: 0.7;
    pointer-events: auto;
    transform: scale(1);
    transition: all 0.3s ease 0.2s;
}

.card-close-btn:hover {
    background: rgba(255, 255, 255, 0.2);
    border-color: rgba(255, 255, 255, 0.8);
    color: rgba(255, 255, 255, 1);
    opacity: 1;
    transform: scale(1.05);
}

.card-close-btn:active {
    transform: scale(0.95);
}


.skill-card-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: rgba(255, 255, 255, 1);
    margin-bottom: var(--space-3);
    transition: font-size 0.5s ease, margin 0.5s ease;
    letter-spacing: -0.02em;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.skill-card-description {
    font-size: 0.95rem;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.98);
    opacity: 1;
    transition: all 0.4s ease;
    font-weight: 400;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}

.skill-card-details {
    font-size: 0.9rem;
    line-height: 1.6;
    color: rgba(255, 255, 255, 0.96);
    opacity: 0;
    max-height: 0;
    overflow: hidden;
    transition: all 0.4s ease;
    margin-top: var(--space-5);
    padding-top: var(--space-4);
    border-top: 1px solid rgba(255, 255, 255, 0.3);
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.15);
}


/* Card positions - fanned out deck layout (desktop only)
   Each card offset horizontally with slight rotation for visual depth */
.skill-card:nth-child(1) {
    transform: translateX(-28rem) translateY(1rem) rotate(-8deg) scale(0.92);
    z-index: 1;
}

.skill-card:nth-child(2) {
    transform: translateX(-14rem) translateY(0.5rem) rotate(-4deg) scale(0.96);
    z-index: 2;
}

.skill-card:nth-child(3) {
    transform: translateX(0) translateY(0) rotate(0deg) scale(1);
    z-index: 3;
}

.skill-card:nth-child(4) {
    transform: translateX(14rem) translateY(0.5rem) rotate(4deg) scale(0.96);
    z-index: 4;
}

.skill-card:nth-child(5) {
    transform: translateX(28rem) translateY(1rem) rotate(8deg) scale(0.92);
    z-index: 5;
}

/* Hover state - lift slightly (only on non-touch devices) */
@media (hover: hover) and (pointer: fine) {
    .skill-card:hover:not(.expanded) {
        transform: translateY(-1rem) scale(1.03);
        z-index: 100 !important;
        box-shadow: 0 2rem 4.5rem rgba(0, 0, 0, 0.45), 0 0.5rem 1rem rgba(0, 0, 0, 0.25);
    }
}

/* Keep original position transforms on hover (only on non-touch devices) */
@media (hover: hover) and (pointer: fine) {
    .skill-card:nth-child(1):hover:not(.expanded) {
        transform: translateX(-28rem) translateY(-1rem) rotate(-8deg) scale(0.98);
    }

    .skill-card:nth-child(2):hover:not(.expanded) {
        transform: translateX(-14rem) translateY(-1rem) rotate(-4deg) scale(1);
    }

    .skill-card:nth-child(3):hover:not(.expanded) {
        transform: translateX(0) translateY(-1rem) rotate(0deg) scale(1.03);
    }

    .skill-card:nth-child(4):hover:not(.expanded) {
        transform: translateX(14rem) translateY(-1rem) rotate(4deg) scale(1);
    }

    .skill-card:nth-child(5):hover:not(.expanded) {
        transform: translateX(28rem) translateY(-1rem) rotate(8deg) scale(0.98);
    }
}

/* Card Backdrop Overlay */
.card-backdrop {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.65);
    z-index: 999;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.5s ease;
}

.card-backdrop.active {
    opacity: 1;
    pointer-events: auto;
}

/* Expanded state - center and enlarge (desktop only)
   Moves clicked card to center of screen with smooth animation */
@media (min-width: 769px) {
    .skill-card.expanding {
        z-index: 1000 !important;
        transition: all 0.5s cubic-bezier(0.4, 0.0, 0.2, 1);
    }

    .skill-card.expanded {
        position: fixed !important;
        top: 50% !important;
        left: 50% !important;
        transform: translate(-50%, -50%) rotate(0deg) scale(1) !important;
        width: min(45rem, 80vw) !important;
        height: min(26rem, 60vh) !important;
        max-height: 60vh !important;
        z-index: 1000 !important;
        box-shadow: 0 2rem 5rem rgba(0, 0, 0, 0.8);
        padding: var(--space-5) !important;
        overflow-y: auto;
        overflow-x: hidden;
        filter: none !important;
        opacity: 1 !important;
    }

    .skill-card.collapsing {
        z-index: 1000 !important;
        transition: all 0.5s cubic-bezier(0.4, 0.0, 0.2, 1);
    }

    .skill-card.expanded .skill-card-title {
        font-size: 2rem;
        margin-bottom: var(--space-4);
        transition: all 0.5s ease;
    }

    .skill-card.expanded .skill-card-description {
        opacity: 1;
        max-height: none;
        font-size: 1.1rem;
        transition: all 0.5s ease 0.2s;
    }

    .skill-card.expanded .skill-card-details {
        opacity: 1;
        max-height: none;
        font-size: 1.1rem;
        transition: all 0.5s ease 0.2s;
    }

    /* Hide other cards when one is expanded */
    .card-deck:has(.skill-card.expanded) .skill-card:not(.expanded):not(.collapsing) {
        opacity: 0;
        pointer-events: none;
        transition: opacity 0.3s ease;
    }
}

/* Theme Toggle Button */
.theme-toggle {
    position: fixed;
    bottom: 1.5rem;
    right: 1.5rem;
    background: transparent;
    border: none;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    color: var(--text-muted);
    font-size: 1.25rem;
    transition: all 0.3s ease;
    z-index: 1001;
}

.theme-toggle:hover {
    color: var(--accent);
    transform: scale(1.15);
}

.theme-toggle #theme-icon {
    transition: transform 0.5s ease;
}

.theme-toggle:active #theme-icon {
    transform: rotate(180deg);
}

/* Social Links (Bottom Left) */
.social-links-fixed {
    position: fixed;
    bottom: 1.5rem;
    left: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: var(--space-3);
    z-index: 1000;
}

.social-links-fixed a {
    color: var(--text-muted);
    font-size: 1.2rem;
    opacity: 0.7;
    transition: all 0.3s ease;
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.social-links-fixed a:hover {
    color: var(--accent);
    opacity: 1;
    transform: scale(1.15);
}

.social-links-fixed a:active {
    transform: scale(0.95);
}

.social-links-fixed .email-link {
    cursor: pointer;
}

.social-links-fixed .email-link .copied-feedback {
    position: absolute;
    left: 2rem;
    white-space: nowrap;
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--accent);
    pointer-events: none;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Tablet/Medium Screens */
@media (max-width: 1200px) {
    .projects-dropdown {
        right: auto;
        left: 50%;
        transform: translateX(-50%);
        width: auto;
        max-width: 90%;
        text-align: left;
    }
    
    .projects-dropdown.hidden {
        transform: translateX(-50%) translateY(-20px);
    }
    
    .dropdown-item {
        text-align: left;
        white-space: normal;
        word-wrap: break-word;
    }
}

/* Tablet Card Deck (481-768px) - Reduced Overlap */
/* Responsive card deck for medium screens (951px - 1250px) */
@media (min-width: 951px) and (max-width: 1250px) {
    /* Scale card width proportionally based on viewport */
    .skill-card {
        width: clamp(13rem, 15vw, 18rem);
        height: clamp(11rem, 12vw, 14rem);
        padding: clamp(1rem, 2vw, var(--space-5));
    }

    /* Scale card positions to fit within viewport */
    .skill-card:nth-child(1) {
        transform: translateX(clamp(-28rem, -22vw, -20rem)) translateY(0.8rem) rotate(-7deg) scale(0.93);
    }
    
    .skill-card:nth-child(2) {
        transform: translateX(clamp(-14rem, -11vw, -10rem)) translateY(0.4rem) rotate(-3.5deg) scale(0.96);
    }
    
    .skill-card:nth-child(3) {
        transform: translateX(0) translateY(0) rotate(0deg) scale(1);
    }
    
    .skill-card:nth-child(4) {
        transform: translateX(clamp(10rem, 11vw, 14rem)) translateY(0.4rem) rotate(3.5deg) scale(0.96);
    }
    
    .skill-card:nth-child(5) {
        transform: translateX(clamp(20rem, 22vw, 28rem)) translateY(0.8rem) rotate(7deg) scale(0.93);
    }

    /* Hover states for responsive cards */
    .skill-card:nth-child(1):hover:not(.expanded) {
        transform: translateX(clamp(-28rem, -22vw, -20rem)) translateY(-1rem) rotate(-7deg) scale(0.96);
    }

    .skill-card:nth-child(2):hover:not(.expanded) {
        transform: translateX(clamp(-14rem, -11vw, -10rem)) translateY(-1rem) rotate(-3.5deg) scale(0.99);
    }

    .skill-card:nth-child(3):hover:not(.expanded) {
        transform: translateX(0) translateY(-1rem) rotate(0deg) scale(1.03);
    }

    .skill-card:nth-child(4):hover:not(.expanded) {
        transform: translateX(clamp(10rem, 11vw, 14rem)) translateY(-1rem) rotate(3.5deg) scale(0.99);
    }

    .skill-card:nth-child(5):hover:not(.expanded) {
        transform: translateX(clamp(20rem, 22vw, 28rem)) translateY(-1rem) rotate(7deg) scale(0.96);
    }

    .skill-card.expanded {
        width: 80vw !important;
        height: 65vh !important;
        max-height: 65vh !important;
    }
}

@media (min-width: 481px) and (max-width: 768px) {
    .layout-container {
        height: 100vh;
        padding: var(--space-4);
    }

    .site-header {
        top: var(--space-4);
        left: var(--space-4);
        right: var(--space-4);
    }

    .center-panel {
        padding: var(--space-4);
    }

    .intro-message {
        font-size: 1.75rem;
    }

    .projects-dropdown {
        right: auto;
        left: 50%;
        transform: translateX(-50%);
        width: auto;
        max-width: 90%;
        top: 6.5rem;
    }
    
    .projects-dropdown.hidden {
        transform: translateX(-50%) translateY(-20px);
    }
    
    .dropdown-item {
        white-space: normal;
        text-align: center;
        word-wrap: break-word;
    }

    /* Reduce card spacing and rotation for tablet */
    .skill-card:nth-child(1) {
        transform: translateX(-16rem) translateY(0.5rem) rotate(-4deg) scale(0.95);
    }
    
    .skill-card:nth-child(2) {
        transform: translateX(-8rem) translateY(0.25rem) rotate(-2deg) scale(0.97);
    }
    
    .skill-card:nth-child(3) {
        transform: translateX(0) translateY(0) rotate(0deg) scale(1);
    }
    
    .skill-card:nth-child(4) {
        transform: translateX(8rem) translateY(0.25rem) rotate(2deg) scale(0.97);
    }
    
    .skill-card:nth-child(5) {
        transform: translateX(16rem) translateY(0.5rem) rotate(4deg) scale(0.95);
    }
    
    .skill-card.expanded {
        width: 85vw !important;
        height: 60vh !important;
        max-height: 60vh !important;
    }
}

/* Mobile Responsiveness (Tablet only, NOT small mobile) */
/* Mobile/Tablet Responsiveness - Stack Deck Layout
   Cards arranged in vertical stack with active card on top, swipeable */
@media (max-width: 950px) {
    /* Layout adjustments */
    .layout-container {
        height: 100vh;
        padding: var(--space-3);
    }

    .site-header {
        top: var(--space-3);
        left: var(--space-3);
        right: var(--space-3);
    }

    .center-panel {
        padding: var(--space-3);
        margin-top: var(--space-5);
    }

    .intro-message {
        font-size: 1.5rem;
    }

    .projects-dropdown {
        right: auto;
        left: 50%;
        transform: translateX(-50%);
        width: auto;
        max-width: 95%;
        top: 8.5rem;
    }
    
    .projects-dropdown.hidden {
        transform: translateX(-50%) translateY(-20px);
    }
    
    .dropdown-item {
        white-space: normal;
        text-align: left;
        word-wrap: break-word;
        padding-right: var(--space-3);
    }

    /* Mobile deck: cards stacked with visible offset */
    .card-deck {
        position: relative;
        height: auto;
        min-height: 24rem;
        display: flex;
        align-items: center;
        justify-content: center;
        margin-top: var(--space-0);
        margin-bottom: 3rem;
        width: 100%;
        overflow: visible;
        perspective: 1000px;
    }

    /* Override desktop fan layout: stack cards vertically instead */
    .card-deck .skill-card {
        position: absolute !important;
        left: 50% !important;
        bottom: calc(4.5rem + env(safe-area-inset-bottom, 0px)) !important;
        width: min(92vw, 22rem) !important;
        height: auto !important;
        min-height: 18rem !important;
        max-height: calc(100vh - 14rem) !important;
        padding: var(--space-4) !important;
        transform: translateX(-50%) scale(0.985) !important;
        transform-style: flat !important;
        transition: transform 0.35s cubic-bezier(0.4, 0, 0.2, 1), opacity 0.25s ease;
        opacity: 0;
        pointer-events: none;
        overflow-y: auto !important;
    }

    /* Show all content on mobile (no expand needed) */
    .card-deck .skill-card .skill-card-description,
    .card-deck .skill-card .skill-card-details {
        opacity: 1 !important;
        max-height: none !important;
    }

    .card-deck .skill-card.active {
        opacity: 1;
        z-index: 10 !important;
        transform: translateX(-50%) translateY(0) scale(1) rotate(0deg) !important;
        pointer-events: auto !important;
        cursor: grab !important;
        box-shadow: 0 1rem 3rem rgba(0, 0, 0, 0.3);
        user-select: none;
        -webkit-user-select: none;
    }

    /* Swiping/dragging state - REMOVE transform so inline style can work */
    .card-deck .skill-card.swiping {
        transition: none !important;
        cursor: grabbing !important;
        z-index: 100 !important;
        box-shadow: 0 2rem 4rem rgba(0, 0, 0, 0.5) !important;
        pointer-events: auto !important;
        user-select: none !important;
        -webkit-user-select: none !important;
        transform: none !important;
    }

    /* Cards moving to back of stack */
    .card-deck .skill-card.moving-to-back {
        transform: translateX(calc(-50% + 3rem)) translateY(2.5rem) scale(0.85) !important;
        opacity: 0 !important;
        pointer-events: none !important;
        transition: all 0.4s cubic-bezier(0.4, 0, 0.2, 1) !important;
        z-index: 1 !important;
    }

    /* Cards behind active card: visible stacked offset for depth perception
       Only front card is interactive - background cards are visual only */
    .card-deck .skill-card.stacked-1 {
        opacity: 1;
        z-index: 9 !important;
        transform: translateX(calc(-50% + 0.4rem)) translateY(1.5rem) scale(0.96) rotate(2deg) !important;
        pointer-events: none !important;
        cursor: default !important;
        box-shadow: 0 0.5rem 2rem rgba(0, 0, 0, 0.2);
    }

    .card-deck .skill-card.stacked-2 {
        opacity: 1;
        z-index: 8 !important;
        transform: translateX(calc(-50% + 0.8rem)) translateY(2rem) scale(0.93) rotate(4deg) !important;
        pointer-events: none !important;
        cursor: default !important;
        box-shadow: 0 0.5rem 2rem rgba(0, 0, 0, 0.15);
    }

    .card-deck .skill-card.stacked-3 {
        opacity: 1;
        z-index: 7 !important;
        transform: translateX(calc(-50% + 1.2rem)) translateY(2.5rem) scale(0.90) rotate(6deg) !important;
        pointer-events: none !important;
        cursor: default !important;
        box-shadow: 0 0.5rem 2rem rgba(0, 0, 0, 0.1);
    }

    .card-deck .skill-card.stacked-4 {
        opacity: 1;
        z-index: 6 !important;
        transform: translateX(calc(-50% + 1.6rem)) translateY(3rem) scale(0.87) rotate(8deg) !important;
        pointer-events: none !important;
        cursor: default !important;
        box-shadow: 0 0.5rem 2rem rgba(0, 0, 0, 0.05);
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-card);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent);
}

/* Pattern Animations: Subtle movement for card background patterns */
@keyframes moveDiagonal {
    0% {
        background-position: 0 0;
    }
    100% {
        background-position: 20px 20px;
    }
}

@keyframes moveSlashUp {
    0% {
        background-position: 0 0;
    }
    100% {
        background-position: 20px -20px;
    }
}

@keyframes moveSlashDown {
    0% {
        background-position: 0 0;
    }
    100% {
        background-position: -20px 20px;
    }
}

@keyframes moveWaves {
    0% {
        background-position: 0 0;
    }
    100% {
        background-position: 40px 0;
    }
}