/* style.css - Sistem de teme și design modern */

:root {
    /* Light theme (default) */
    --bg-primary: linear-gradient(145deg, #f6f9fc 0%, #eef2f5 100%);
    --bg-card: rgba(255, 255, 255, 0.95);
    --text-primary: #1e293b;
    --text-secondary: #5b6e8c;
    --border-color: rgba(59, 130, 246, 0.15);
    --card-shadow: 0 12px 22px -12px rgba(0, 0, 0, 0.1);
    --hover-shadow: 0 20px 28px -14px rgba(0, 0, 0, 0.2);
    --input-bg: white;
    --input-border: #e2e8f0;
    --btn-bg: #1e293b;
    --btn-hover: #0f172a;
    --code-bg: #f8fafc;
    --stat-bg: rgba(255, 255, 255, 0.6);
}

[data-theme="dark"] {
    --bg-primary: linear-gradient(145deg, #0f172a 0%, #1e293b 100%);
    --bg-card: rgba(30, 41, 59, 0.95);
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --border-color: rgba(59, 130, 246, 0.25);
    --card-shadow: 0 12px 22px -12px rgba(0, 0, 0, 0.4);
    --hover-shadow: 0 20px 28px -14px rgba(0, 0, 0, 0.5);
    --input-bg: #1e293b;
    --input-border: #334155;
    --btn-bg: #3b82f6;
    --btn-hover: #2563eb;
    --code-bg: #0f172a;
    --stat-bg: rgba(30, 41, 59, 0.8);
}

[data-theme="ocean"] {
    --bg-primary: linear-gradient(145deg, #0c4a6e 0%, #0891b2 100%);
    --bg-card: rgba(255, 255, 255, 0.92);
    --text-primary: #0c4a6e;
    --text-secondary: #155e75;
    --border-color: rgba(14, 165, 233, 0.3);
    --card-shadow: 0 12px 22px -12px rgba(0, 0, 0, 0.2);
    --hover-shadow: 0 20px 28px -14px rgba(0, 0, 0, 0.3);
    --input-bg: white;
    --input-border: #22d3ee;
    --btn-bg: #0891b2;
    --btn-hover: #0e7490;
    --code-bg: #ecfeff;
    --stat-bg: rgba(255, 255, 255, 0.7);
}

[data-theme="sunset"] {
    --bg-primary: linear-gradient(145deg, #991b1b 0%, #ea580c 100%);
    --bg-card: rgba(255, 248, 240, 0.96);
    --text-primary: #7c2d12;
    --text-secondary: #9a3412;
    --border-color: rgba(234, 88, 12, 0.25);
    --card-shadow: 0 12px 22px -12px rgba(0, 0, 0, 0.2);
    --hover-shadow: 0 20px 28px -14px rgba(0, 0, 0, 0.3);
    --input-bg: #fff7ed;
    --input-border: #fdba74;
    --btn-bg: #ea580c;
    --btn-hover: #c2410c;
    --code-bg: #ffedd5;
    --stat-bg: rgba(255, 255, 255, 0.7);
}

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

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    padding: 2rem 1rem;
    transition: all 0.3s ease;
}

/* Theme switcher */
.theme-switcher {
    position: fixed;
    top: 1rem;
    right: 1rem;
    display: flex;
    gap: 0.5rem;
    z-index: 1000;
    background: var(--bg-card);
    padding: 0.5rem;
    border-radius: 3rem;
    backdrop-filter: blur(10px);
    box-shadow: var(--card-shadow);
}

.theme-btn {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: none;
    cursor: pointer;
    font-size: 1.2rem;
    transition: all 0.2s;
    background: transparent;
}

.theme-btn:hover {
    transform: scale(1.1);
}

/* Container principal */
.container {
    max-width: 1400px;
    width: 100%;
    margin: 0 auto;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 2rem;
}

.header h1 {
    font-size: 2.5rem;
    font-weight: 800;
    background: linear-gradient(135deg, #3b82f6, #8b5cf6);
    background-clip: text;
    -webkit-background-clip: text;
    color: transparent;
    margin-bottom: 0.5rem;
}

.icon {
    font-size: 2rem;
    display: inline-block;
    margin-right: 0.5rem;
}

.subhead {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Form card */
.form-card {
    background: var(--bg-card);
    border-radius: 2rem;
    padding: 1.8rem;
    margin-bottom: 2rem;
    box-shadow: var(--card-shadow);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border-color);
}

.input-group {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    align-items: flex-end;
}

.input-field {
    flex: 3;
    min-width: 250px;
}

.input-field label {
    display: block;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.tooltip {
    font-size: 0.75rem;
    font-weight: normal;
    margin-left: 0.5rem;
    cursor: help;
    color: var(--text-secondary);
}

.input-field input {
    width: 100%;
    padding: 0.85rem 1rem;
    font-size: 1rem;
    border: 2px solid var(--input-border);
    border-radius: 1rem;
    background: var(--input-bg);
    color: var(--text-primary);
    transition: all 0.2s;
}

.input-field input:focus {
    outline: none;
    border-color: #3b82f6;
    box-shadow: 0 0 0 3px rgba(59, 130, 246, 0.2);
}

.btn-primary {
    background: var(--btn-bg);
    color: white;
    border: none;
    padding: 0.85rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: 1rem;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex: 1;
    min-width: 160px;
    justify-content: center;
}

.btn-primary:hover {
    background: var(--btn-hover);
    transform: translateY(-2px);
    box-shadow: var(--hover-shadow);
}

.btn-icon {
    font-size: 1.2rem;
}

.error-message {
    margin-top: 1rem;
    padding: 0.75rem 1rem;
    background: #fee2e2;
    color: #b91c1c;
    border-radius: 1rem;
    font-weight: 500;
}

.info-badge {
    margin-top: 1rem;
    padding: 0.5rem 1rem;
    background: var(--code-bg);
    border-radius: 1rem;
    font-size: 0.85rem;
    color: var(--text-primary);
}

.evaluated-info {
    font-size: 0.75rem;
    opacity: 0.7;
    margin-left: 0.5rem;
}

/* Stats bar */
.stats-bar {
    display: flex;
    justify-content: space-around;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.stat-item {
    background: var(--stat-bg);
    backdrop-filter: blur(10px);
    padding: 1rem 1.5rem;
    border-radius: 1rem;
    text-align: center;
    flex: 1;
    min-width: 120px;
    border: 1px solid var(--border-color);
}

.stat-value {
    display: block;
    font-size: 1.8rem;
    font-weight: 800;
    color: #3b82f6;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-secondary);
}

/* Grid de carduri */
.sequences-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(380px, 1fr));
    gap: 1.5rem;
}

.sequence-card {
    background: var(--bg-card);
    border-radius: 1.5rem;
    padding: 1.2rem;
    box-shadow: var(--card-shadow);
    transition: all 0.3s ease;
    border: 1px solid var(--border-color);
    position: relative;
    overflow: hidden;
}

.sequence-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, #3b82f6, #8b5cf6);
}

.sequence-card[data-color="gold"]::before { background: linear-gradient(90deg, #fbbf24, #f59e0b); }
.sequence-card[data-color="blue"]::before { background: linear-gradient(90deg, #3b82f6, #2563eb); }
.sequence-card[data-color="purple"]::before { background: linear-gradient(90deg, #a855f7, #7c3aed); }
.sequence-card[data-color="green"]::before { background: linear-gradient(90deg, #10b981, #059669); }
.sequence-card[data-color="cyan"]::before { background: linear-gradient(90deg, #06b6d4, #0891b2); }
.sequence-card[data-color="red"]::before { background: linear-gradient(90deg, #ef4444, #dc2626); }
.sequence-card[data-color="orange"]::before { background: linear-gradient(90deg, #f97316, #ea580c); }
.sequence-card[data-color="yellow"]::before { background: linear-gradient(90deg, #eab308, #ca8a04); }
.sequence-card[data-color="teal"]::before { background: linear-gradient(90deg, #14b8a6, #0d9488); }
.sequence-card[data-color="indigo"]::before { background: linear-gradient(90deg, #6366f1, #4f46e5); }
.sequence-card[data-color="pink"]::before { background: linear-gradient(90deg, #ec4899, #db2777); }
.sequence-card[data-color="rose"]::before { background: linear-gradient(90deg, #f43f5e, #e11d48); }
.sequence-card[data-color="slate"]::before { background: linear-gradient(90deg, #64748b, #475569); }

.sequence-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--hover-shadow);
}

.card-header {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    margin-bottom: 0.5rem;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.card-title {
    font-size: 1.2rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.card-badge {
    background: var(--code-bg);
    padding: 0.2rem 0.6rem;
    border-radius: 2rem;
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.card-meta {
    font-size: 0.75rem;
}

.element-count {
    color: var(--text-secondary);
}

.card-desc {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    font-family: monospace;
}

.sequence-content {
    background: var(--code-bg);
    border-radius: 1rem;
    padding: 0.75rem;
    margin-top: 0.5rem;
}

.sequence-label {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-secondary);
    display: block;
    margin-bottom: 0.5rem;
}

.sequence-values {
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.8rem;
    line-height: 1.5;
    word-break: break-word;
    max-height: 150px;
    overflow-y: auto;
    color: var(--text-primary);
}

/* Scrollbar personalizată */
.sequence-values::-webkit-scrollbar {
    width: 6px;
    height: 6px;
}

.sequence-values::-webkit-scrollbar-track {
    background: var(--border-color);
    border-radius: 10px;
}

.sequence-values::-webkit-scrollbar-thumb {
    background: #3b82f6;
    border-radius: 10px;
}

.card-footer {
    margin-top: 0.75rem;
    text-align: center;
}

.expand-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    padding: 0.4rem 1rem;
    border-radius: 2rem;
    font-size: 0.7rem;
    cursor: pointer;
    color: var(--text-primary);
    transition: all 0.2s;
}

.expand-btn:hover {
    background: var(--btn-bg);
    color: white;
}

/* Empty state */
.empty-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 3rem;
    background: var(--bg-card);
    border-radius: 2rem;
}

.empty-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.empty-state h3 {
    margin-bottom: 0.5rem;
}

/* Footer */
.footer {
    margin-top: 2rem;
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-secondary);
    border-top: 1px solid var(--border-color);
    padding-top: 1.5rem;
}

.footer p {
    margin: 0.25rem 0;
}

.footer code {
    background: var(--code-bg);
    padding: 0.2rem 0.4rem;
    border-radius: 0.3rem;
    font-family: monospace;
}

/* Responsive */
@media (max-width: 768px) {
    body {
        padding: 1rem;
    }
    
    .header h1 {
        font-size: 1.8rem;
    }
    
    .sequences-grid {
        grid-template-columns: 1fr;
    }
    
    .stats-bar {
        flex-direction: column;
    }
    
    .theme-switcher {
        position: relative;
        justify-content: center;
        margin-bottom: 1rem;
    }
}