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

:root {
    --color-bg: #0a0a0a;
    --color-surface: #141414;
    --color-border: #2a2a2a;
    --color-text: #ffffff;
    --color-text-muted: #888888;
    --color-accent: #00ff88;
    --color-accent-dim: #00ff8822;
    --color-error: #ff3366;
    
    --font-display: 'JetBrains Mono', monospace;
    --font-body: 'DM Sans', sans-serif;
}

body {
    font-family: var(--font-body);
    background: var(--color-bg);
    color: var(--color-text);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* Noise texture overlay */
.noise {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    opacity: 0.03;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)'/%3E%3C/svg%3E");
    z-index: 1;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 40px 20px;
    position: relative;
    z-index: 2;
}

/* Header */
.header {
    border-bottom: 2px solid var(--color-border);
    padding-bottom: 30px;
    margin-bottom: 50px;
}

.header-top {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 12px;
}

.logo {
    font-family: var(--font-display);
    font-size: clamp(2rem, 5vw, 3.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--color-text);
}

.live-indicator {
    display: flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-display);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
}

.dot {
    width: 8px;
    height: 8px;
    background: var(--color-accent);
    border-radius: 50%;
    animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; transform: scale(1); }
    50% { opacity: 0.5; transform: scale(0.9); }
}

.header-subtitle {
    font-size: 1rem;
    color: var(--color-text-muted);
    font-weight: 400;
}

/* Converter Section */
.converter-section {
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    padding: 40px;
    margin-bottom: 60px;
}

.input-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 30px;
    margin-bottom: 30px;
}

.input-wrapper {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.input-label {
    font-family: var(--font-display);
    font-size: 0.75rem;
    letter-spacing: 0.15em;
    color: var(--color-text-muted);
    font-weight: 700;
}

.input-field,
.select-field {
    background: var(--color-bg);
    border: 2px solid var(--color-border);
    color: var(--color-text);
    padding: 16px 20px;
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    transition: all 0.2s ease;
}

.input-field:focus,
.select-field:focus {
    outline: none;
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-dim);
}

.select-field {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='12' height='8' viewBox='0 0 12 8' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M1 1L6 6L11 1' stroke='%2300ff88' stroke-width='2'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 20px center;
    padding-right: 50px;
}

.select-field option,
.select-field optgroup {
    background: var(--color-bg);
    color: var(--color-text);
    font-family: var(--font-display);
}

.convert-btn {
    width: 100%;
    background: var(--color-accent);
    color: var(--color-bg);
    border: none;
    padding: 20px;
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 0.1em;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    transition: all 0.2s ease;
    position: relative;
    overflow: hidden;
}

.convert-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s ease;
}

.convert-btn:hover::before {
    left: 100%;
}

.convert-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 24px var(--color-accent-dim);
}

.convert-btn:active {
    transform: translateY(0);
}

.btn-arrow {
    font-size: 1.5rem;
    transition: transform 0.2s ease;
}

.convert-btn:hover .btn-arrow {
    transform: translateX(4px);
}

/* Loading */
.loading {
    text-align: center;
    padding: 60px 20px;
}

.loading-bars {
    display: flex;
    gap: 8px;
    justify-content: center;
    margin-bottom: 20px;
}

.bar {
    width: 4px;
    height: 40px;
    background: var(--color-accent);
    animation: loadingBar 1.2s ease-in-out infinite;
}

.bar:nth-child(2) { animation-delay: 0.1s; }
.bar:nth-child(3) { animation-delay: 0.2s; }
.bar:nth-child(4) { animation-delay: 0.3s; }

@keyframes loadingBar {
    0%, 100% { transform: scaleY(1); opacity: 1; }
    50% { transform: scaleY(0.3); opacity: 0.5; }
}

.loading-text {
    font-family: var(--font-display);
    font-size: 0.875rem;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
}

/* Results */
.results {
    animation: fadeIn 0.4s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.results-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 30px;
    margin-bottom: 40px;
    border-bottom: 2px solid var(--color-border);
}

.results-title {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: 0.05em;
}

.input-badge {
    background: var(--color-surface);
    border: 2px solid var(--color-border);
    padding: 10px 20px;
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 700;
    color: var(--color-accent);
}

.currency-category {
    margin-bottom: 50px;
}

.category-title {
    font-family: var(--font-display);
    font-size: 0.875rem;
    letter-spacing: 0.15em;
    color: var(--color-text-muted);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 1px solid var(--color-border);
}

.currency-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1px;
    background: var(--color-border);
    border: 2px solid var(--color-border);
}

.currency-card {
    background: var(--color-surface);
    padding: 24px;
    transition: all 0.2s ease;
    position: relative;
}

.currency-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width 0.3s ease;
}

.currency-card:hover::before {
    width: 100%;
}

.currency-card:hover {
    background: var(--color-bg);
}

.currency-name {
    font-family: var(--font-display);
    font-size: 0.75rem;
    letter-spacing: 0.1em;
    color: var(--color-text-muted);
    margin-bottom: 8px;
}

.currency-value {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text);
    word-break: break-all;
}

/* Footer */
.results-footer {
    margin-top: 60px;
    padding-top: 30px;
    border-top: 2px solid var(--color-border);
}

.timestamp {
    font-family: var(--font-display);
    font-size: 0.75rem;
    letter-spacing: 0.05em;
    color: var(--color-text-muted);
    text-align: center;
}

/* Error */
.error {
    background: var(--color-surface);
    border: 2px solid var(--color-error);
    padding: 30px;
    margin-bottom: 40px;
    font-family: var(--font-display);
    color: var(--color-error);
    text-align: center;
}

/* Utilities */
.hidden {
    display: none;
}

/* Responsive */
@media (max-width: 768px) {
    .container {
        padding: 20px 15px;
    }
    
    .header {
        padding-bottom: 20px;
        margin-bottom: 30px;
    }
    
    .header-top {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
    
    .converter-section {
        padding: 25px 20px;
    }
    
    .input-row {
        grid-template-columns: 1fr;
        gap: 20px;
    }
    
    .currency-grid {
        grid-template-columns: 1fr;
    }
    
    .results-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 15px;
    }
}