@import url('https://fonts.googleapis.com/css2?family=JetBrains+Mono:wght@400;700&family=Inter:wght@400;600;800&display=swap');

:root {
    --bg-color: #ffffff;
    --text-color: #111111;
    --accent-color: #000000;
    --border-color: #000000;
    --secondary-bg: #f5f5f5;
    --shadow: 6px 6px 0px rgba(0, 0, 0, 1);
    --border: 2px solid var(--border-color);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', sans-serif;
    background: var(--bg-color);
    min-height: 100vh;
    color: var(--text-color);
    line-height: 1.6;
}

/* Navbar */
.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 40px;
    border-bottom: var(--border);
    background: #fff;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.nav-brand {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 800;
    font-size: 1.8rem;
    letter-spacing: -1px;
    border: 2px solid #000;
    padding: 5px 15px;
    background: #000;
    color: #fff;
    box-shadow: 4px 4px 0px rgba(0,0,0,0.2);
}

.nav-links {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    font-weight: 700;
    text-transform: uppercase;
}

/* Hero Section */
.hero-section {
    padding: 80px 20px;
    text-align: center;
    background: #ffffff;
    border-bottom: var(--border);
    position: relative;
    overflow: hidden;
}

.hero-slideshow {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
    pointer-events: none;
}

.slide {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-size: cover;
    background-position: center;
    opacity: 0;
    filter: grayscale(100%) brightness(1.2) contrast(0.8);
    animation: slideFade 15s infinite;
}

.slide:nth-child(1) { animation-delay: 0s; }
.slide:nth-child(2) { animation-delay: 5s; }
.slide:nth-child(3) { animation-delay: 10s; }

@keyframes slideFade {
    0% { opacity: 0; transform: scale(1); }
    10% { opacity: 0.15; }
    33% { opacity: 0.15; }
    43% { opacity: 0; transform: scale(1.05); }
    100% { opacity: 0; }
}

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

.hero-content h1 {
    font-size: 5rem;
    font-weight: 800;
    letter-spacing: -2px;
    margin-bottom: 10px;
    text-shadow: 4px 4px 0px rgba(0,0,0,0.1);
}

.hero-content .subtitle {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 20px;
    font-family: 'JetBrains Mono', monospace;
    text-transform: uppercase;
}

.hero-content .desc {
    max-width: 600px;
    margin: 0 auto;
    font-size: 1.1rem;
    color: #444;
}

.container {
    max-width: 1200px;
    margin: 40px auto;
    padding: 0 20px;
}

/* Instructions Panel */
.instructions-panel {
    background: var(--secondary-bg);
    border: var(--border);
    padding: 30px;
    margin-bottom: 40px;
    box-shadow: var(--shadow);
}

.instructions-panel h3 {
    font-family: 'JetBrains Mono', monospace;
    text-transform: uppercase;
    border-bottom: 2px solid #000;
    margin-bottom: 20px;
    padding-bottom: 10px;
    display: inline-block;
}

.instructions-panel ol {
    padding-left: 20px;
}

.instructions-panel li {
    margin-bottom: 10px;
    padding-left: 10px;
}

.instructions-panel a {
    color: #000;
    font-weight: bold;
    text-decoration: underline;
}

/* Upload Section */
.upload-section {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.upload-card {
    background: #fff;
    padding: 40px;
    border: var(--border);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
}

.upload-card:hover {
    box-shadow: var(--shadow);
    transform: translate(-4px, -4px);
}

.upload-card h2 {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.2rem;
    margin-bottom: 25px;
    color: #000;
    text-transform: uppercase;
    letter-spacing: -0.5px;
    background: #000;
    color: #fff;
    padding: 5px 10px;
    width: 100%;
}

.file-input-wrapper {
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 15px;
}

input[type="file"] {
    display: none;
}

.file-label {
    display: block;
    width: 100%;
    padding: 20px;
    background: #fff;
    color: #000;
    border: 2px dashed #000;
    cursor: pointer;
    text-align: center;
    transition: all 0.2s;
    font-weight: 800;
    text-transform: uppercase;
    font-family: 'Inter', sans-serif;
}

.file-label:hover {
    background: #f0f0f0;
    border-style: solid;
}

.file-name {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    color: #000;
    border-bottom: 1px solid #000;
    padding: 5px;
    background: #f9f9f9;
}

.action-section {
    padding: 0 0 60px;
    text-align: center;
}

.verify-btn {
    padding: 25px 80px;
    font-size: 1.5rem;
    font-weight: 900;
    font-family: 'JetBrains Mono', monospace;
    color: #fff;
    background: #000;
    border: 4px solid #000;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: var(--shadow);
    text-transform: uppercase;
    letter-spacing: 2px;
    position: relative;
    overflow: hidden;
}

.verify-btn:hover:not(:disabled) {
    background: #fff;
    color: #000;
    transform: translate(-2px, -2px);
    box-shadow: 8px 8px 0px rgba(0,0,0,1);
}

.verify-btn:disabled {
    background: #e0e0e0;
    color: #aaa;
    border-color: #ccc;
    cursor: not-allowed;
    box-shadow: none;
}

.preview-section {
    padding: 40px;
    background: #fff;
    border: var(--border);
    margin-bottom: 40px;
    box-shadow: var(--shadow);
}

.preview-section h3 {
    font-family: 'JetBrains Mono', monospace;
    margin-bottom: 20px;
    text-transform: uppercase;
    font-weight: 800;
}

#imageCanvas {
    max-width: 100%;
    border: 2px solid #000;
    display: block;
    margin: 0 auto;
    background: repeating-linear-gradient(
        45deg,
        #f0f0f0,
        #f0f0f0 10px,
        #ffffff 10px,
        #ffffff 20px
    );
}

.image-info {
    margin-top: 25px;
    padding: 20px;
    background: #fff;
    border: 2px solid #000;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
}

.image-info p {
    margin: 10px 0;
    font-size: 0.9rem;
    color: #000;
    border-bottom: 1px dashed #ccc;
    padding-bottom: 5px;
}

.progress-section {
    padding: 40px;
    text-align: center;
    border: var(--border);
    margin: 20px 0;
    background: #fff;
}

.progress-bar {
    width: 100%;
    height: 40px;
    background: #fff;
    border: 3px solid #000;
    margin-bottom: 20px;
    position: relative;
    padding: 3px;
}

.progress-fill {
    height: 100%;
    background: repeating-linear-gradient(
        -45deg,
        #000,
        #000 10px,
        #333 10px,
        #333 20px
    );
    width: 0%;
    transition: width 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

#progressText {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.1rem;
    color: #000;
    font-weight: 700;
    text-transform: uppercase;
}

.results-section {
    margin-top: 40px;
}

.result-card {
    padding: 40px;
    margin-bottom: 40px;
    text-align: center;
    font-size: 1.5rem;
    font-weight: 800;
    border: 4px solid #000;
    box-shadow: var(--shadow);
    text-transform: uppercase;
    font-family: 'JetBrains Mono', monospace;
    background: #fff;
    position: relative;
}

.result-card.authentic {
    background: #fff;
    color: #000;
}
.result-card.authentic::before {
    content: "STATUS: VERIFIED";
    position: absolute;
    top: -15px;
    left: 20px;
    background: #000;
    color: #fff;
    font-size: 0.8rem;
    padding: 5px 10px;
}

.result-card.modified {
    background: #fff;
    color: #000;
    border-style: dashed;
}

.result-card.forged {
    background: #000;
    color: #fff;
    border: 4px double #fff;
    outline: 4px solid #000;
}

.strands-comparison h3, .visual-comparison h3 {
    font-family: 'JetBrains Mono', monospace;
    text-transform: uppercase;
    font-weight: 800;
    font-size: 1.5rem;
    margin-bottom: 25px;
    border-left: 10px solid #000;
    padding-left: 15px;
}

.strand-detail {
    background: white;
    padding: 25px;
    margin-bottom: 20px;
    border: 2px solid #000;
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    align-items: center;
}

.strand-detail.match {
    background: #fcfcfc;
}

.strand-detail.mismatch {
    background: #fff0f0;
    border-color: #000;
}

.strand-detail h4 {
    width: 100%;
    margin-bottom: 15px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.1rem;
    border-bottom: 2px solid #000;
    padding-bottom: 10px;
}

.strand-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 15px;
    width: 100%;
}

.stat-item {
    background: #fff;
    padding: 10px;
    border: 1px solid #000;
    text-align: center;
}

.stat-label {
    font-size: 0.75rem;
    font-family: 'JetBrains Mono', monospace;
    text-transform: uppercase;
    margin-bottom: 5px;
}

.stat-value {
    font-size: 1.4rem;
    font-weight: 800;
}

.main-footer {
    border-top: 4px solid #000;
    background: #fff;
    padding: 40px 20px;
    margin-top: 60px;
    text-align: center;
}

.footer-content p {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    margin-bottom: 10px;
}

.footer-sub {
    font-size: 0.8rem;
    color: #666;
}

@media (max-width: 768px) {
    .upload-section {
        grid-template-columns: 1fr;
    }
    
    .hero-content h1 {
        font-size: 3rem;
    }
}