/* Reset & Base */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

:root {
    --bg: #0f1117;
    --surface: #1a1d27;
    --surface2: #242836;
    --border: #2e3345;
    --text: #e4e7ef;
    --text-muted: #8b92a8;
    --primary: #6c63ff;
    --primary-hover: #5a52d5;
    --accent: #00d4aa;
    --error: #ff6b6b;
    --success: #51cf66;
    --radius: 10px;
}

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

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

/* Header */
header {
    padding: 32px 0 16px;
    text-align: center;
}

.logo {
    font-size: 2rem;
    font-weight: 700;
    letter-spacing: -1px;
}

.logo span {
    color: var(--primary);
}

.tagline {
    color: var(--text-muted);
    font-size: 0.95rem;
    margin-top: 4px;
}

/* Navigation Tabs */
.tool-nav {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--bg);
    border-bottom: 1px solid var(--border);
    padding: 12px 0;
    margin-bottom: 24px;
}

.tool-nav .container {
    display: flex;
    gap: 6px;
    overflow-x: auto;
    scrollbar-width: none;
}

.tool-nav .container::-webkit-scrollbar { display: none; }

.tab {
    background: var(--surface);
    border: 1px solid var(--border);
    color: var(--text-muted);
    padding: 8px 16px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    white-space: nowrap;
    transition: all 0.2s;
}

.tab:hover {
    color: var(--text);
    border-color: var(--primary);
}

.tab.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

/* Tool Panels */
.tool-panel {
    display: none;
    animation: fadeIn 0.3s ease;
}

.tool-panel.active { display: block; }

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(8px); }
    to { opacity: 1; transform: translateY(0); }
}

.tool-panel h2 {
    font-size: 1.4rem;
    margin-bottom: 6px;
}

.tool-panel > p {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 20px;
}

/* Layout */
.tool-layout {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.input-group, .output-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.input-group.full-width { width: 100%; }

label {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 0.5px;
}

textarea {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.9rem;
    padding: 14px;
    resize: vertical;
    min-height: 160px;
    outline: none;
    transition: border-color 0.2s;
}

textarea:focus {
    border-color: var(--primary);
}

.output-box {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 14px;
    min-height: 160px;
    font-family: 'SF Mono', 'Fira Code', monospace;
    font-size: 0.85rem;
    white-space: pre-wrap;
    word-break: break-all;
    overflow-y: auto;
    max-height: 400px;
}

/* Buttons */
.btn-group {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

button {
    background: var(--primary);
    color: white;
    border: none;
    padding: 10px 20px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
}

button:hover { background: var(--primary-hover); }

button.secondary {
    background: var(--surface2);
    color: var(--text-muted);
}

button.secondary:hover {
    background: var(--border);
    color: var(--text);
}

/* Stats Grid (Text Counter) */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.stat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-value {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* Color Palette */
.palette-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 12px;
}

.palette-card {
    border-radius: var(--radius);
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.2s;
    border: 1px solid var(--border);
}

.palette-card:hover { transform: scale(1.05); }

.palette-swatch {
    height: 120px;
    width: 100%;
}

.palette-info {
    background: var(--surface);
    padding: 10px;
    text-align: center;
}

.palette-hex {
    font-family: monospace;
    font-size: 0.85rem;
    font-weight: 600;
}

.palette-rgb {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: 2px;
}

/* Hash Results */
.hash-results {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.hash-row {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 12px 16px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 12px;
}

.hash-label {
    font-size: 0.8rem;
    font-weight: 700;
    color: var(--accent);
    min-width: 70px;
}

.hash-value {
    font-family: monospace;
    font-size: 0.8rem;
    word-break: break-all;
    flex: 1;
}

.hash-copy {
    background: var(--surface2);
    color: var(--text-muted);
    border: none;
    padding: 6px 12px;
    border-radius: 6px;
    font-size: 0.75rem;
    cursor: pointer;
    white-space: nowrap;
}

.hash-copy:hover {
    background: var(--border);
    color: var(--text);
}

/* Ad Slot */
.ad-slot {
    margin: 40px 0;
    text-align: center;
}

.ad-placeholder {
    background: var(--surface);
    border: 1px dashed var(--border);
    border-radius: var(--radius);
    padding: 40px;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Footer */
footer {
    border-top: 1px solid var(--border);
    padding: 24px 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.8rem;
    margin-top: 40px;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--accent);
    color: var(--bg);
    padding: 10px 24px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1000;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* Responsive */
@media (max-width: 768px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .palette-grid { grid-template-columns: repeat(3, 1fr); }
    .logo { font-size: 1.5rem; }
    .hash-row { flex-direction: column; align-items: flex-start; }
}

@media (max-width: 480px) {
    .stats-grid { grid-template-columns: repeat(2, 1fr); }
    .palette-grid { grid-template-columns: repeat(2, 1fr); }
    .palette-swatch { height: 80px; }
    .btn-group { flex-direction: column; }
    .btn-group button { width: 100%; }
}