:root {
    --bg-primary: #f5f1e8;
    --bg-secondary: #fefdfb;
    --text-primary: #2c2416;
    --text-secondary: #6b5d4f;
    --accent: #8b6f47;
    --accent-hover: #6d5636;
    --border: #d4c4a8;
    --success: #5a7d5a;
    --error: #a84432;
    --shadow: rgba(44, 36, 22, 0.15);
    --ornament: #b8956a;
}

[data-theme="dark"] {
    --bg-primary: #1a1612;
    --bg-secondary: #2a2318;
    --text-primary: #e8dcc8;
    --text-secondary: #a89878;
    --border: #3d3426;
    --shadow: rgba(0, 0, 0, 0.4);
    --ornament: #8b6f47;
}

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

body {
    font-family: 'Georgia', 'Garamond', 'Times New Roman', serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.8;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background-image: 
        repeating-linear-gradient(0deg, transparent, transparent 2px, rgba(139, 111, 71, 0.03) 2px, rgba(139, 111, 71, 0.03) 4px);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
    flex: 1;
}

header {
    text-align: center;
    margin-bottom: 3rem;
    padding: 2rem 1rem;
    border-bottom: 3px double var(--border);
}

.header-ornament {
    font-size: 2rem;
    color: var(--ornament);
    margin: 0.5rem 0;
}

header h1 {
    font-size: 3rem;
    margin: 1rem 0 0.5rem;
    color: var(--text-primary);
    font-weight: 400;
    letter-spacing: 2px;
    text-transform: uppercase;
    font-family: 'Georgia', serif;
}

.subtitle {
    font-size: 0.875rem;
    color: var(--text-secondary);
    letter-spacing: 3px;
    margin-bottom: 0.5rem;
    font-style: italic;
}

header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    font-style: italic;
    margin: 0.5rem 0;
}

.card {
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    padding: 2.5rem;
    margin-bottom: 2rem;
    box-shadow: 0 2px 8px var(--shadow), inset 0 1px 0 rgba(255,255,255,0.5);
    position: relative;
}

.card::before,
.card::after {
    content: '';
    position: absolute;
    width: 20px;
    height: 20px;
    border: 2px solid var(--ornament);
}

.card::before {
    top: 10px;
    left: 10px;
    border-right: none;
    border-bottom: none;
}

.card::after {
    bottom: 10px;
    right: 10px;
    border-left: none;
    border-top: none;
}

.card:hover {
    box-shadow: 0 4px 12px var(--shadow), inset 0 1px 0 rgba(255,255,255,0.5);
}

.card h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-weight: 400;
    text-align: center;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border);
    letter-spacing: 1px;
}

.input-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

.input-group {
    margin-bottom: 1.5rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.95rem;
    letter-spacing: 0.5px;
}

.input-group input {
    width: 100%;
    padding: 0.875rem;
    border: 2px solid var(--border);
    background: var(--bg-primary);
    color: var(--text-primary);
    font-family: 'Georgia', serif;
    font-size: 1rem;
}

.input-group input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: inset 0 1px 3px var(--shadow);
}

.button-group {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

button {
    padding: 0.875rem 1.75rem;
    border: 2px solid var(--accent);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    flex: 1;
    min-width: 120px;
    font-family: 'Georgia', serif;
    letter-spacing: 1px;
    text-transform: uppercase;
    font-size: 0.875rem;
    transition: all 0.2s;
}

.btn-primary {
    background: var(--accent);
    color: var(--bg-secondary);
}

.btn-primary:hover {
    background: var(--accent-hover);
    box-shadow: 0 2px 6px var(--shadow);
}

.btn-secondary {
    background: var(--bg-primary);
    color: var(--text-primary);
    border: 2px solid var(--border);
}

.btn-secondary:hover {
    background: var(--border);
}

.result {
    margin-top: 1.5rem;
    padding: 2rem;
    background: var(--bg-primary);
    border: 2px solid var(--border);
    border-left: 4px solid var(--accent);
}

.result h3 {
    color: var(--accent);
    margin-bottom: 1rem;
    font-size: 1.25rem;
    font-weight: 400;
    text-align: center;
    letter-spacing: 1px;
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.result-item {
    background: var(--bg-secondary);
    padding: 1.25rem;
    text-align: center;
    border: 1px solid var(--border);
    box-shadow: inset 0 1px 2px rgba(0,0,0,0.05);
}

.result-item .value {
    font-size: 2.25rem;
    font-weight: 400;
    color: var(--accent);
    display: block;
    font-family: 'Georgia', serif;
}

.result-item .label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
    letter-spacing: 1px;
    text-transform: uppercase;
}

.error {
    margin-top: 1rem;
    padding: 1rem;
    background: rgba(168, 68, 50, 0.1);
    border-left: 4px solid var(--error);
    border: 2px solid var(--error);
    color: var(--error);
    font-weight: 500;
}

.theme-toggle {
    position: fixed;
    top: 1.5rem;
    right: 1.5rem;
    width: 50px;
    height: 50px;
    background: var(--bg-secondary);
    border: 2px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    box-shadow: 0 2px 6px var(--shadow);
    z-index: 1000;
}

.theme-toggle:hover {
    background: var(--bg-primary);
    border-color: var(--accent);
}

.theme-toggle svg {
    width: 24px;
    height: 24px;
    color: var(--text-primary);
}

.sun-icon {
    display: block;
}

.moon-icon {
    display: none;
}

[data-theme="dark"] .sun-icon {
    display: none;
}

[data-theme="dark"] .moon-icon {
    display: block;
}

.live-counter {
    text-align: center;
    padding: 2rem;
}

.live-counter .counter-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.live-counter .counter-item {
    background: var(--bg-primary);
    padding: 1.5rem 1rem;
    border: 2px solid var(--border);
}

.live-counter .counter-value {
    font-size: 2.5rem;
    font-weight: 400;
    color: var(--accent);
    font-variant-numeric: tabular-nums;
    font-family: 'Georgia', serif;
}

.live-counter .counter-label {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 0.5rem;
}

.progress-bar {
    width: 100%;
    height: 10px;
    background: var(--bg-primary);
    overflow: hidden;
    margin-top: 1rem;
    border: 1px solid var(--border);
}

.progress-fill {
    height: 100%;
    background: var(--accent);
    transition: width 0.6s ease;
}

.copy-btn {
    margin-top: 1rem;
    padding: 0.5rem 1rem;
    background: var(--success);
    color: var(--bg-secondary);
    border: 2px solid var(--success);
    cursor: pointer;
    font-size: 0.875rem;
    font-family: 'Georgia', serif;
    letter-spacing: 1px;
}

.copy-btn:hover {
    opacity: 0.85;
}

footer {
    text-align: center;
    padding: 2rem 1rem;
    color: var(--text-secondary);
    border-top: 3px double var(--border);
    margin-top: auto;
    font-style: italic;
}

.footer-ornament {
    color: var(--ornament);
    margin: 0.5rem 0;
    letter-spacing: 4px;
}

.footer-small {
    font-size: 0.875rem;
    margin-top: 0.5rem;
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeInUp {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideIn {
    from { opacity: 0; transform: translateX(-10px); }
    to { opacity: 1; transform: translateX(0); }
}

@media (max-width: 768px) {
    header h1 { font-size: 2rem; }
    .card { padding: 1.5rem; }
    .button-group { flex-direction: column; }
    button { width: 100%; }
    .result-grid { grid-template-columns: 1fr; }
    .input-row { grid-template-columns: 1fr; }
    .theme-toggle { top: 1rem; right: 1rem; width: 45px; height: 45px; }
}

@media (max-width: 480px) {
    .container { padding: 1rem 0.5rem; }
    header h1 { font-size: 1.75rem; }
    header p { font-size: 1rem; }
}