/* Reset and Variables */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-black: #000000;
    --primary-white: #ffffff;
    --gray-50: #fafafa;
    --gray-100: #f5f5f5;
    --gray-200: #e5e5e5;
    --gray-300: #d4d4d4;
    --gray-400: #a3a3a3;
    --gray-500: #737373;
    --gray-600: #525252;
    --gray-700: #404040;
    --gray-800: #262626;
    --gray-900: #171717;
    
    --accent-red: #ff0000;
    --accent-green: #00ff00;
    
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    
    --shadow-brutal: 8px 8px 0px var(--primary-black);
    --shadow-soft: 0 10px 30px rgba(0, 0, 0, 0.3);
    --shadow-inner: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

body {
    font-family: var(--font-family);
    background: 
        radial-gradient(circle at 20% 80%, rgba(0, 0, 0, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(0, 0, 0, 0.05) 0%, transparent 50%),
        repeating-linear-gradient(
            45deg,
            var(--gray-50) 0px,
            var(--gray-50) 2px,
            transparent 2px,
            transparent 20px
        ),
        linear-gradient(135deg, 
            var(--gray-100) 0%, 
            var(--primary-white) 25%, 
            var(--gray-50) 50%, 
            var(--primary-white) 75%, 
            var(--gray-100) 100%);
    background-size: 400% 400%, 400% 400%, 40px 40px, 400% 400%;
    animation: gradientShift 20s ease infinite, patternMove 30s linear infinite;
    min-height: 100vh;
    overflow: hidden;
}

@keyframes gradientShift {
    0%, 100% { background-position: 0% 50%, 0% 50%, 0px 0px, 0% 50%; }
    50% { background-position: 100% 50%, 100% 50%, 20px 20px, 100% 50%; }
}

@keyframes patternMove {
    0% { background-position: 0% 50%, 0% 50%, 0px 0px, 0% 50%; }
    100% { background-position: 0% 50%, 0% 50%, 40px 40px, 0% 50%; }
}

.app-container {
    height: 100vh;
    display: flex;
    flex-direction: column;
    position: relative;
}

/* Header */
.demo-header {
    background: var(--primary-white);
    border-bottom: 4px solid var(--primary-black);
    position: relative;
    z-index: 100;
}

.demo-header::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    right: 0;
    height: 4px;
    background: repeating-linear-gradient(
        90deg,
        var(--primary-black) 0px,
        var(--primary-black) 10px,
        transparent 10px,
        transparent 20px
    );
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    max-width: 1400px;
    margin: 0 auto;
}

.back-btn {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--primary-black);
    color: var(--primary-white);
    border: none;
    padding: 0.75rem 1.5rem;
    font-weight: 700;
    cursor: pointer;
    transition: all 0.2s ease;
    transform: skew(-5deg);
    font-size: 1rem;
}

.back-btn:hover {
    transform: skew(-5deg) translateY(-2px);
    box-shadow: var(--shadow-brutal);
}

.back-btn:active {
    transform: skew(-5deg) translateY(0);
    box-shadow: 4px 4px 0px var(--primary-black);
}

.logo {
    display: flex;
    align-items: center;
    gap: 1rem;
    position: relative;
}

.logo h1 {
    font-size: 2rem;
    font-weight: 900;
    color: var(--primary-black);
    text-transform: uppercase;
    letter-spacing: -0.05em;
    position: relative;
}

.logo h1::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary-black);
    transform: skew(-10deg);
}

.demo-badge {
    background: var(--primary-black);
    color: var(--primary-white);
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    font-weight: 800;
    transform: rotate(-5deg);
    position: absolute;
    top: -10px;
    right: -20px;
}

.stats {
    background: var(--gray-900);
    color: var(--primary-white);
    padding: 0.75rem 1.5rem;
    font-weight: 700;
    transform: skew(5deg);
    border: 2px solid var(--primary-black);
}

/* Main Container */
.swipe-container {
    flex: 1;
    display: grid;
    grid-template-columns: 1fr 300px;
    gap: 2rem;
    padding: 2rem;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

/* Swipe Area */
.swipe-area {
    position: relative;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background: var(--primary-white);
    border: 4px solid var(--primary-black);
    box-shadow: var(--shadow-brutal);
    padding: 2rem;
    overflow: hidden;
}

.swipe-area::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 20px,
        var(--gray-50) 20px,
        var(--gray-50) 40px
    );
    opacity: 0.3;
    pointer-events: none;
}

/* Photo Stack */
.photo-stack {
    position: relative;
    width: 350px;
    height: 500px;
    margin-bottom: 2rem;
    border: 2px;
}

.photo-card {
    position: absolute;
    width: 100%;
    height: 100%;
    background: var(--primary-white);
    border: 2px solid var(--primary-black);
    box-shadow: var(--shadow-soft);
    cursor: grab;
    user-select: none;
    overflow: hidden;
    transform-origin: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    
    /* Unique brutalist styling */
    clip-path: polygon(0 0, calc(100% - 10px) 0, 100% 10px, 100% 100%, 10px 100%, 0 calc(100% - 10px));
}

.photo-card::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: repeating-conic-gradient(
        from 0deg at 50% 50%,
        var(--primary-black) 0deg,
        var(--primary-black) 2deg,
        transparent 2deg,
        transparent 8deg
    );
    z-index: -1;
    animation: borderRotate 10s linear infinite;
}

@keyframes borderRotate {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.photo-card:nth-child(1) {
    z-index: 10;
    transform: rotate(0deg);
    filter: contrast(1.1) saturate(0);
}

.photo-card:nth-child(2) {
    z-index: 9;
    transform: rotate(2deg) scale(0.95) translateY(5px);
    opacity: 0.8;
    filter: blur(0.5px) contrast(0.9) saturate(0);
}

.photo-card:nth-child(3) {
    z-index: 8;
    transform: rotate(-1deg) scale(0.9) translateY(10px);
    opacity: 0.6;
    filter: blur(1px) contrast(0.8) saturate(0);
}

.photo-card:nth-child(n+4) {
    z-index: 7;
    transform: rotate(1deg) scale(0.85) translateY(15px);
    opacity: 0.4;
    filter: blur(1.5px) contrast(0.7) saturate(0);
}

.photo-card.dragging {
    cursor: grabbing;
    z-index: 20;
    transform: rotate(5deg) scale(1.05);
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.4),
        0 0 0 3px var(--primary-white),
        0 0 0 6px var(--primary-black);
    filter: contrast(1.2) saturate(0) brightness(1.1);
}

.photo-card.dragging::before {
    animation-duration: 2s;
}

.photo-card.swiping-left {
    transform: translateX(-100px) rotate(-10deg);
    opacity: 0.7;
    filter: contrast(1.3) saturate(0) hue-rotate(180deg);
}

.photo-card.swiping-right {
    transform: translateX(100px) rotate(10deg);
    opacity: 0.7;
    filter: contrast(1.3) saturate(0) hue-rotate(90deg);
}

.photo-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: grayscale(100%) contrast(1.2);
    transition: filter 0.3s ease;
}

.photo-image.low-quality {
    filter: grayscale(100%) contrast(1.5) brightness(0.8) blur(1px);
    animation: qualityGlitch 2s infinite;
}

@keyframes qualityGlitch {
    0%, 100% { filter: grayscale(100%) contrast(1.5) brightness(0.8) blur(1px); }
    10% { filter: grayscale(100%) contrast(2) brightness(0.6) blur(2px) hue-rotate(90deg); }
    20% { filter: grayscale(100%) contrast(1.8) brightness(1.2) blur(0.5px); }
    30% { filter: grayscale(100%) contrast(1.5) brightness(0.8) blur(1px); }
}

.glitch-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(
        90deg,
        transparent,
        transparent 2px,
        rgba(255, 0, 0, 0.1) 2px,
        rgba(255, 0, 0, 0.1) 4px,
        transparent 4px,
        transparent 6px,
        rgba(0, 255, 0, 0.1) 6px,
        rgba(0, 255, 0, 0.1) 8px
    );
    animation: glitchMove 0.3s infinite;
    pointer-events: none;
}

@keyframes glitchMove {
    0% { transform: translateX(0); }
    20% { transform: translateX(-2px); }
    40% { transform: translateX(2px); }
    60% { transform: translateX(-1px); }
    80% { transform: translateX(1px); }
    100% { transform: translateX(0); }
}

.photo-card:hover .photo-image {
    filter: grayscale(80%) contrast(1.1);
}

.photo-card:hover .photo-image.low-quality {
    filter: grayscale(80%) contrast(1.8) brightness(0.9) blur(0.5px);
}

.photo-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(transparent, rgba(0, 0, 0, 0.8));
    color: var(--primary-white);
    padding: 1rem;
    font-weight: 600;
}

/* Swipe Indicators */
.swipe-indicators {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    transform: translateY(-50%);
    display: flex;
    justify-content: space-between;
    padding: 0 2rem;
    pointer-events: none;
    z-index: 5;
}

.indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    opacity: 0;
    transform: scale(0.8);
    transition: all 0.3s ease;
    background: var(--primary-white);
    padding: 1rem;
    border: 3px solid var(--primary-black);
    font-weight: 800;
}

.indicator.active {
    opacity: 1;
    transform: scale(1);
}

.indicator.left {
    color: var(--accent-red);
    border-color: var(--accent-red);
    transform: rotate(-5deg);
}

.indicator.right {
    color: var(--accent-green);
    border-color: var(--accent-green);
    transform: rotate(5deg);
}

.indicator .icon {
    font-size: 2rem;
    font-weight: 900;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: 1rem;
    z-index: 15;
}

.action-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    background: var(--primary-white);
    border: 4px solid var(--primary-black);
    padding: 1rem;
    cursor: pointer;
    font-weight: 800;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

.action-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: var(--primary-black);
    transition: left 0.3s ease;
    z-index: -1;
}

.action-btn:hover::before {
    left: 0;
}

.action-btn:hover {
    color: var(--primary-white);
    transform: translateY(-3px);
    box-shadow: 0 6px 0 var(--primary-black);
}

.action-btn:active {
    transform: translateY(0);
    box-shadow: 0 2px 0 var(--primary-black);
}

.action-btn.reject {
    transform: skew(-5deg);
}

.action-btn.super-like {
    transform: scale(1.1);
    background: var(--gray-900);
    color: var(--primary-white);
}

.action-btn.super-like::before {
    background: var(--primary-white);
}

.action-btn.super-like:hover {
    color: var(--primary-black);
}

.action-btn.like {
    transform: skew(5deg);
}

.btn-icon {
    font-size: 1.5rem;
    font-weight: 900;
}

.btn-text {
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

/* Info Panel */
.info-panel {
    background: var(--primary-white);
    border: 4px solid var(--primary-black);
    box-shadow: var(--shadow-brutal);
    padding: 1.5rem;
    height: fit-content;
    position: relative;
    overflow: hidden;
}

.info-panel::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -50%;
    width: 100%;
    height: 100%;
    background: repeating-conic-gradient(
        from 0deg,
        var(--gray-100) 0deg,
        var(--gray-100) 90deg,
        transparent 90deg,
        transparent 180deg
    );
    animation: rotate 30s linear infinite;
    opacity: 0.1;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.panel-content {
    position: relative;
    z-index: 2;
}

.info-panel h3 {
    font-size: 1.2rem;
    font-weight: 900;
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border-bottom: 3px solid var(--primary-black);
    padding-bottom: 0.5rem;
}

.analysis-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding: 0.5rem;
    background: var(--gray-50);
    border: 2px solid var(--gray-300);
    font-weight: 600;
}

.analysis-item:nth-child(odd) {
    transform: skew(-1deg);
}

.analysis-item:nth-child(even) {
    transform: skew(1deg);
}

.label {
    font-weight: 800;
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.1em;
}

.quality-bar {
    width: 60px;
    height: 8px;
    background: var(--gray-300);
    border: 2px solid var(--primary-black);
    position: relative;
    overflow: hidden;
}

.quality-fill {
    height: 100%;
    background: var(--primary-black);
    transition: width 0.5s ease;
    position: relative;
}

.quality-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(
        45deg,
        transparent,
        transparent 2px,
        var(--primary-white) 2px,
        var(--primary-white) 4px
    );
}

.progress-section {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 3px solid var(--primary-black);
    position: relative;
    z-index: 2;
}

.progress-section h4 {
    font-weight: 900;
    margin-bottom: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.progress-stats {
    display: grid;
    grid-template-columns: 1fr;
    gap: 0.75rem;
}

.stat {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--gray-900);
    color: var(--primary-white);
    padding: 0.75rem;
    font-weight: 700;
    border: 2px solid var(--primary-black);
    transform: skew(-2deg);
}

.stat:nth-child(2) {
    transform: skew(2deg);
}

.stat-number {
    font-size: 1.5rem;
    font-weight: 900;
}

.stat-label {
    text-transform: uppercase;
    font-size: 0.8rem;
    letter-spacing: 0.1em;
}

/* Completion Screen */
.completion-screen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: all 0.3s ease;
}

.completion-screen.active {
    opacity: 1;
    visibility: visible;
}

.completion-content {
    background: var(--primary-white);
    border: 6px solid var(--primary-black);
    box-shadow: 0 0 0 20px rgba(0, 0, 0, 0.5);
    padding: 3rem;
    text-align: center;
    max-width: 500px;
    transform: scale(0.8);
    transition: transform 0.3s ease;
}

.completion-screen.active .completion-content {
    transform: scale(1);
}

.completion-icon {
    font-size: 4rem;
    margin-bottom: 1rem;
}

.completion-content h2 {
    font-size: 2rem;
    font-weight: 900;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
}

.completion-content p {
    font-size: 1.1rem;
    color: var(--gray-600);
    margin-bottom: 2rem;
}

.final-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1rem;
    margin-bottom: 2rem;
}

.final-stat {
    text-align: center;
    padding: 1rem;
    background: var(--gray-100);
    border: 3px solid var(--primary-black);
}

.final-stat .number {
    display: block;
    font-size: 2rem;
    font-weight: 900;
    color: var(--primary-black);
}

.final-stat .label {
    font-size: 0.8rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--gray-600);
}

.restart-btn {
    background: var(--primary-black);
    color: var(--primary-white);
    border: none;
    padding: 1rem 2rem;
    font-size: 1.1rem;
    font-weight: 800;
    cursor: pointer;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    transition: all 0.2s ease;
}

.restart-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 0 var(--gray-700);
}

/* Loading Screen */
.loading-screen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--primary-white);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    transition: opacity 0.5s ease;
}

.loading-screen.hidden {
    opacity: 0;
    pointer-events: none;
}

.loading-content {
    text-align: center;
}

.loading-spinner {
    width: 60px;
    height: 60px;
    border: 6px solid var(--gray-300);
    border-top: 6px solid var(--primary-black);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin: 0 auto 2rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-content h3 {
    font-size: 1.5rem;
    font-weight: 900;
    margin-bottom: 0.5rem;
    text-transform: uppercase;
}

.loading-content p {
    color: var(--gray-600);
    font-weight: 500;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .swipe-container {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .info-panel {
        order: -1;
        height: auto;
    }
    
    .progress-stats {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .header-content {
        padding: 1rem;
    }
    
    .logo h1 {
        font-size: 1.5rem;
    }
    
    .swipe-container {
        padding: 1rem;
    }
    
    .photo-stack {
        width: 280px;
        height: 400px;
    }
    
    .action-buttons {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .completion-content {
        padding: 2rem;
        margin: 1rem;
    }
    
    .final-stats {
        grid-template-columns: 1fr;
    }
}

/* Swipe Guide Overlay */
.swipe-guide {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    background: rgba(255, 255, 255, 0.8);
    padding: 1rem 1.5rem;
    border: 2px solid var(--primary-black);
    box-shadow: var(--shadow-brutal);
    pointer-events: none;
    z-index: 200;
    animation: swipeGuideFadeOut 4s ease-in-out forwards 3s; /* show for first 3s */
}

.guide-icon {
    font-size: 2rem;
    animation: swipeIconMove 1.5s ease-in-out infinite;
}

.guide-text {
    font-weight: 700;
    color: var(--primary-black);
    font-size: 0.95rem;
    text-align: center;
}

@keyframes swipeIconMove {
    0% { transform: translateX(-15px); }
    50% { transform: translateX(15px); }
    100% { transform: translateX(-15px); }
}

@keyframes swipeGuideFadeOut {
    to { opacity: 0; visibility: hidden; }
}