@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

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

:root {
    --bg: #0f172a;
    --bg-card: #1e293b;
    --bg-input: #0f172a;
    --border: #334155;
    --border-hover: #475569;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --accent-glow: rgba(59, 130, 246, 0.2);
    --cyan: #06b6d4;
    --green: #10b981;
    --red: #ef4444;
    --text: #e2e8f0;
    --text-mid: #94a3b8;
    --text-dim: #64748b;
    --mono: 'JetBrains Mono', monospace;
}

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

.container { max-width: 960px; margin: 0 auto; padding: 20px; }

/* Header */
.header {
    text-align: center;
    padding: 40px 0 30px;
}
.logo {
    font-size: 2em;
    font-weight: 700;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--accent), var(--cyan));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.logo span { font-weight: 300; opacity: 0.8; }
.tagline {
    color: var(--text-mid);
    font-size: 1.05em;
    margin-top: 6px;
}
.badge {
    display: inline-block;
    margin-top: 12px;
    padding: 4px 12px;
    border-radius: 20px;
    font-size: 0.75em;
    font-family: var(--mono);
    background: rgba(16, 185, 129, 0.1);
    color: var(--green);
    border: 1px solid rgba(16, 185, 129, 0.2);
}

/* Cards */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 16px;
    transition: border-color 0.2s;
}
.card:hover { border-color: var(--border-hover); }
.card-title {
    font-size: 0.8em;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    color: var(--text-dim);
    margin-bottom: 16px;
}

/* Upload Zone */
.upload-zone {
    border: 2px dashed var(--border);
    border-radius: 12px;
    padding: 40px 20px;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    position: relative;
}
.upload-zone:hover, .upload-zone.dragover {
    border-color: var(--accent);
    background: var(--accent-glow);
}
.upload-zone.has-file {
    border-color: var(--green);
    border-style: solid;
    background: rgba(16, 185, 129, 0.05);
}
.upload-icon { font-size: 2.5em; margin-bottom: 12px; }
.upload-text { color: var(--text-mid); font-size: 0.95em; }
.upload-text strong { color: var(--accent); }
.upload-hint {
    color: var(--text-dim);
    font-size: 0.8em;
    margin-top: 8px;
    font-family: var(--mono);
}
.file-input { display: none; }

/* File Info */
.file-info {
    display: none;
    margin-top: 16px;
    padding: 14px 18px;
    background: var(--bg-input);
    border-radius: 8px;
    border: 1px solid var(--border);
}
.file-info.visible { display: block; }
.file-name {
    font-weight: 600;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}
.file-meta {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 8px;
}
.meta-item {
    font-size: 0.82em;
    color: var(--text-dim);
    font-family: var(--mono);
}
.meta-item span { color: var(--text); font-weight: 500; }

/* Filters */
.filters-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 10px;
}
.filter-option {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 10px 14px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
}
.filter-option:hover { border-color: var(--accent); }
.filter-option.checked { border-color: var(--accent); background: var(--accent-glow); }
.filter-option input[type="checkbox"] { margin-top: 2px; accent-color: var(--accent); }
.filter-label { font-size: 0.9em; font-weight: 500; }
.filter-desc { font-size: 0.75em; color: var(--text-dim); margin-top: 2px; }

/* Colormap selector */
.colormap-row {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-top: 14px;
    flex-wrap: wrap;
}
.colormap-row label { font-size: 0.85em; color: var(--text-dim); }
.colormap-btn {
    padding: 6px 14px;
    border-radius: 6px;
    border: 1px solid var(--border);
    background: var(--bg-input);
    color: var(--text);
    font-size: 0.8em;
    font-family: var(--mono);
    cursor: pointer;
    transition: all 0.2s;
}
.colormap-btn:hover { border-color: var(--accent); }
.colormap-btn.active { border-color: var(--accent); background: var(--accent-glow); color: var(--accent); }

/* Process Button */
.process-btn {
    width: 100%;
    padding: 14px;
    border: none;
    border-radius: 10px;
    background: linear-gradient(135deg, var(--accent), #2563eb);
    color: white;
    font-size: 1em;
    font-weight: 600;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    transition: all 0.3s;
    letter-spacing: 0.5px;
}
.process-btn:hover { box-shadow: 0 4px 20px var(--accent-glow); transform: translateY(-1px); }
.process-btn:disabled { opacity: 0.4; cursor: not-allowed; transform: none; box-shadow: none; }
.process-btn.loading { animation: pulse-btn 1.5s infinite; }
@keyframes pulse-btn { 0%,100% { opacity: 0.6; } 50% { opacity: 1; } }

/* Result */
.result-section { display: none; }
.result-section.visible { display: block; }
.result-image {
    width: 100%;
    border-radius: 8px;
    border: 1px solid var(--border);
    margin-bottom: 14px;
}
.result-actions {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}
.result-btn {
    padding: 10px 20px;
    border-radius: 8px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text);
    font-size: 0.85em;
    font-family: 'Inter', sans-serif;
    cursor: pointer;
    transition: all 0.2s;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    gap: 6px;
}
.result-btn:hover { border-color: var(--accent); color: var(--accent); }
.steps-applied {
    margin-top: 12px;
    font-size: 0.8em;
    color: var(--text-dim);
    font-family: var(--mono);
}

/* Error */
.error-msg {
    display: none;
    padding: 12px 16px;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: 8px;
    color: var(--red);
    font-size: 0.85em;
    margin-bottom: 16px;
}
.error-msg.visible { display: block; }

/* Formats */
.formats-list {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}
.format-tag {
    padding: 6px 14px;
    border-radius: 6px;
    font-size: 0.8em;
    font-family: var(--mono);
    border: 1px solid;
}
.format-tag.supported { background: rgba(16,185,129,0.1); color: var(--green); border-color: rgba(16,185,129,0.2); }
.format-tag.soon { background: rgba(100,116,139,0.1); color: var(--text-dim); border-color: rgba(100,116,139,0.2); }

/* How It Works */
.how-it-works { display: flex; flex-direction: column; gap: 14px; }
.step-item {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    padding: 12px 16px;
    background: var(--bg-input);
    border-radius: 8px;
    border-left: 3px solid var(--accent);
    font-size: 0.92em;
    color: var(--text-mid);
    line-height: 1.5;
}
.step-item strong { color: var(--text); }
.step-num {
    flex-shrink: 0;
    width: 28px;
    height: 28px;
    border-radius: 50%;
    background: var(--accent);
    color: white;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.85em;
}

/* Value Props */
.value-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 14px;
}
.value-item {
    text-align: center;
    padding: 20px 14px;
    background: var(--bg-input);
    border-radius: 10px;
    border: 1px solid var(--border);
    transition: border-color 0.2s, transform 0.2s;
}
.value-item:hover { border-color: var(--accent); transform: translateY(-2px); }
.value-icon { font-size: 1.8em; margin-bottom: 8px; }
.value-title { font-weight: 600; font-size: 0.95em; margin-bottom: 4px; color: var(--text); }
.value-desc { font-size: 0.8em; color: var(--text-dim); line-height: 1.4; }

/* Footer */
.footer {
    text-align: center;
    padding: 30px 0;
    color: var(--text-dim);
    font-size: 0.8em;
}
.footer a { color: var(--accent); text-decoration: none; }
.footer a:hover { text-decoration: underline; }

/* Responsive */
@media (max-width: 600px) {
    .container { padding: 12px; }
    .header { padding: 24px 0 16px; }
    .logo { font-size: 1.6em; }
    .upload-zone { padding: 24px 16px; }
    .file-meta { grid-template-columns: 1fr 1fr; }
    .filters-grid { grid-template-columns: 1fr; }
}