:root {
    --bg: #0b0d13;
    --surface: #13151f;
    --border: #1f2233;
    --text: #e1e4ed;
    --text-muted: #8b8fa3;
    --accent: #7c3aed;
    --accent-hover: #6d28d9;
    --accent-light: rgba(124, 58, 237, 0.15);
    --success: #22c55e;
    --warning: #f59e0b;
    --error: #ef4444;
    --info: #3b82f6;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
}

/* --- Navbar --- */
.navbar {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    padding: 0.8rem 2rem;
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-left { display: flex; align-items: center; gap: 1rem; }
.nav-menu { display: flex; align-items: center; gap: 0.5rem; margin-left: auto; }

.nav-brand {
    font-size: 1.3rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent), #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    text-decoration: none;
    margin-right: 1rem;
}

.nav-link {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.9rem;
    padding: 0.3rem 0.6rem;
    border-radius: 4px;
    transition: all 0.2s;
}
.nav-link:hover { color: var(--text); background: var(--border); }
.nav-link.active { color: var(--accent); background: var(--accent-light); }
.nav-user { font-size: 0.9rem; color: var(--text-muted); }
.nav-user-section { display: flex; align-items: center; gap: 0.5rem; margin-left: 0.5rem; }

.burger { display: none; flex-direction: column; gap: 4px; background: none; border: none; cursor: pointer; padding: 4px; }
.burger span { display: block; width: 22px; height: 2px; background: var(--text); border-radius: 2px; }

/* --- Container --- */
.container { max-width: 1400px; margin: 0 auto; padding: 2rem; }

/* --- Login --- */
.login-body { display: flex; align-items: center; justify-content: center; min-height: 100vh; }
.login-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 16px;
    padding: 3rem;
    text-align: center;
    max-width: 400px;
    width: 100%;
}
.login-title {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, var(--accent), #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.3rem;
}
.login-subtitle { color: var(--text-muted); margin-bottom: 2rem; }

.btn-login {
    display: inline-block;
    background: var(--accent);
    color: #fff;
    padding: 0.8rem 2rem;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: background 0.2s;
    width: 100%;
}
.btn-login:hover { background: var(--accent-hover); }

/* --- Page Header --- */
.page-header { margin-bottom: 2rem; display: flex; align-items: center; justify-content: space-between; flex-wrap: wrap; gap: 0.5rem; }
.page-header h1 { font-size: 1.8rem; font-weight: 700; }
.count { color: var(--text-muted); font-weight: 400; font-size: 1rem; }

.section { margin-bottom: 2.5rem; }
.section h2 { font-size: 1.1rem; font-weight: 600; color: var(--text-muted); margin-bottom: 1rem; }
.section-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: 1rem; }
.section-header h2 { margin-bottom: 0; }

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.3rem;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    transition: all 0.2s;
}

.btn-primary { background: var(--accent); color: #fff; border-color: var(--accent); }
.btn-primary:hover { background: var(--accent-hover); }
.btn-secondary { background: var(--surface); color: var(--text); border-color: var(--border); }
.btn-secondary:hover { border-color: var(--accent); color: var(--accent); }
.btn-small { padding: 0.3rem 0.6rem; font-size: 0.75rem; }
.btn-large { width: 100%; padding: 0.7rem 1rem; font-size: 1rem; justify-content: center; }
.btn:disabled { opacity: 0.5; cursor: not-allowed; }

/* --- Stats --- */
.stats-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(160px, 1fr)); gap: 1rem; margin-bottom: 1.5rem; }
.stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 1.2rem;
    text-align: center;
}
.stat-card.accent { border-color: var(--accent); }
.stat-value { font-size: 2rem; font-weight: 700; }
.stat-label { font-size: 0.8rem; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.05em; }

/* --- Badges --- */
.badge {
    display: inline-block;
    padding: 0.15rem 0.5rem;
    border-radius: 10px;
    font-size: 0.7rem;
    font-weight: 500;
}
.badge-model { background: var(--accent-light); color: var(--accent); }

/* --- Filter Tabs --- */
.filter-tabs { display: flex; gap: 0.3rem; flex-wrap: wrap; }
.filter-tab {
    padding: 0.4rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-muted);
    background: var(--surface);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: all 0.2s;
}
.filter-tab:hover { color: var(--text); border-color: var(--accent); }
.filter-tab.active { color: #fff; font-weight: 600; background: var(--accent); border-color: var(--accent); }

/* --- Generate Layout --- */
.generate-layout {
    display: grid;
    grid-template-columns: 440px 1fr;
    gap: 2rem;
    align-items: start;
}

.param-panel {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 1.2rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    position: sticky;
    top: 70px;
}

.param-group { display: flex; flex-direction: column; gap: 0.3rem; }
.param-group label { font-size: 0.8rem; font-weight: 600; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.03em; }
.param-row { display: flex; gap: 0.8rem; }

.text-input, .select-input {
    width: 100%;
    padding: 0.5rem 0.7rem;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    color: var(--text);
    font-size: 0.85rem;
    font-family: inherit;
    transition: border-color 0.2s;
}
.text-input:focus, .select-input:focus { outline: none; border-color: var(--accent); }
textarea.text-input { resize: vertical; min-height: 60px; }

.results-panel { min-height: 300px; }

/* --- Reference Image Upload --- */
.ref-upload-zone {
    border: 2px dashed var(--border);
    border-radius: 8px;
    overflow: hidden;
    transition: border-color 0.2s;
    min-height: 80px;
}
.ref-upload-zone.dragover { border-color: var(--accent); background: var(--accent-light); }

.ref-placeholder {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 1rem;
    cursor: pointer;
    color: var(--text-muted);
    min-height: 80px;
}
.ref-placeholder:hover { color: var(--text); }

.ref-preview {
    position: relative;
}
.ref-preview img {
    width: 100%;
    max-height: 200px;
    object-fit: contain;
    display: block;
    background: var(--bg);
}
.ref-remove {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: rgba(0,0,0,0.7);
    color: #fff;
    border: none;
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    line-height: 1;
}
.ref-remove:hover { background: var(--error); }

/* --- Generation Status --- */
.gen-status-bar {
    display: flex;
    align-items: center;
    gap: 0.8rem;
    padding: 0.8rem 1rem;
    background: var(--surface);
    border: 1px solid var(--accent);
    border-radius: 8px;
    margin-bottom: 1rem;
    font-size: 0.9rem;
}

.task-pulse {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: var(--accent);
    animation: pulse 1.5s infinite;
    flex-shrink: 0;
}
@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.8); }
}

/* --- Results Grid --- */
.gen-results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1rem;
}

.gen-result-item {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow: hidden;
}
.gen-result-item img { width: 100%; display: block; cursor: pointer; }
.gen-result-actions { padding: 0.5rem; display: flex; gap: 0.3rem; }

/* --- Gallery Grid --- */
.gen-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(240px, 1fr));
    gap: 1rem;
}

.gen-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 10px;
    overflow: hidden;
    transition: border-color 0.2s;
}
.gen-card:hover { border-color: var(--accent); }

.gen-image { aspect-ratio: 4/3; overflow: hidden; background: var(--bg); }
.gen-image img { width: 100%; height: 100%; object-fit: cover; cursor: pointer; }

.gen-info { padding: 0.6rem 0.8rem; }
.gen-prompt {
    font-size: 0.8rem;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    margin-bottom: 0.3rem;
}
.gen-meta { display: flex; flex-wrap: wrap; gap: 0.3rem; align-items: center; font-size: 0.7rem; }

/* --- Empty State --- */
.empty-state { text-align: center; padding: 4rem 2rem; color: var(--text-muted); }
.empty-state h2 { color: var(--text); margin-bottom: 0.5rem; }
.empty-state a { color: var(--accent); text-decoration: underline; }

.text-muted { color: var(--text-muted); }

/* --- Responsive --- */
@media (max-width: 768px) {
    .container { padding: 1rem; }
    .burger { display: flex; }
    .nav-menu {
        display: none; flex-direction: column; align-items: stretch;
        width: 100%; gap: 0; margin-left: 0; padding-top: 0.8rem;
    }
    .nav-menu.open { display: flex; }
    .nav-menu .nav-link { padding: 0.7rem 0.6rem; border-radius: 0; border-top: 1px solid var(--border); font-size: 1rem; }
    .nav-user-section { padding: 0.7rem 0.6rem; border-top: 1px solid var(--border); margin-left: 0; }
    .navbar { padding: 0.6rem 1rem; }

    .generate-layout { grid-template-columns: 1fr; }
    .param-panel { position: static; }
    .gen-grid { grid-template-columns: repeat(2, 1fr); }
    .gen-results-grid { grid-template-columns: 1fr; }
}