:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --card-border: rgba(148, 163, 184, 0.1);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-color: #38bdf8;
    --accent-glow: rgba(56, 189, 248, 0.2);
    --success-color: #4ade80;
    --font-family: 'Outfit', sans-serif;
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    line-height: 1.6;
    overflow-x: hidden;
}

.background-glow {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background:
        radial-gradient(circle at 15% 50%, rgba(56, 189, 248, 0.08), transparent 25%),
        radial-gradient(circle at 85% 30%, rgba(168, 85, 247, 0.08), transparent 25%);
    pointer-events: none;
    z-index: -1;
}

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



/* Header */
header {
    padding: 4rem 0 2rem;
    text-align: center;
}

h1 {
    font-size: 3.5rem;
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, #fff, #94a3b8);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.highlight {
    color: var(--accent-color);
    -webkit-text-fill-color: var(--accent-color);
}

header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Controls */
.controls {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    flex-wrap: wrap;
    gap: 1rem;
    background: var(--card-bg);
    padding: 1rem;
    border-radius: 1rem;
    border: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
}

.search-box {
    position: relative;
    flex: 1;
    min-width: 280px;
}

.search-icon {
    position: absolute;
    left: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    width: 1.2rem;
    height: 1.2rem;
}

input[type="text"] {
    width: 100%;
    padding: 0.75rem 1rem 0.75rem 3rem;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--card-border);
    border-radius: 0.75rem;
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 1rem;
    transition: all 0.3s ease;
}

input[type="text"]:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.base-currency {
    padding: 0.5rem 1rem;
    background: rgba(56, 189, 248, 0.1);
    border-radius: 0.5rem;
    color: var(--accent-color);
    font-weight: 600;
    font-size: 0.9rem;
    border: 1px solid rgba(56, 189, 248, 0.2);
}

/* Converter */
.converter-section {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 1rem;
    padding: 2rem;
    margin-bottom: 3rem;
    backdrop-filter: blur(10px);
}

.converter-section h2 {
    margin-bottom: 1.5rem;
    color: var(--text-primary);
    font-size: 1.5rem;
}

.converter-controls {
    display: flex;
    align-items: flex-end;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.input-group,
.select-group {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    min-width: 150px;
}

.input-group label,
.select-group label {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.converter-controls input,
.converter-controls select {
    width: 100%;
    padding: 0.75rem;
    background: rgba(15, 23, 42, 0.5);
    border: 1px solid var(--card-border);
    border-radius: 0.75rem;
    color: var(--text-primary);
    font-family: var(--font-family);
    font-size: 1.1rem;
    transition: all 0.3s ease;
}

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

.swap-btn {
    background: rgba(56, 189, 248, 0.1);
    border: 1px solid rgba(56, 189, 248, 0.2);
    color: var(--accent-color);
    width: 48px;
    height: 48px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-bottom: 2px;
    /* Align with inputs */
}

.swap-btn:hover {
    background: var(--accent-color);
    color: #fff;
    transform: rotate(180deg);
}

.conversion-result {
    text-align: center;
    padding: 1.5rem;
    background: rgba(15, 23, 42, 0.3);
    border-radius: 0.75rem;
    margin-top: 1rem;
}

.conversion-result p {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

/* Grid */
.rates-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-bottom: 3rem;
}

.rate-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: 1rem;
    padding: 1.5rem;
    transition: all 0.3s ease;
    cursor: default;
    position: relative;
    overflow: hidden;
}

.rate-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(45deg, transparent, rgba(255, 255, 255, 0.03), transparent);
    transform: translateX(-100%);
    transition: 0.5s;
}

.rate-card:hover {
    transform: translateY(-5px);
    border-color: rgba(56, 189, 248, 0.3);
    box-shadow: 0 10px 30px -10px rgba(0, 0, 0, 0.5);
}

.rate-card:hover::before {
    transform: translateX(100%);
}

.currency-code {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.currency-name {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.rate-value {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--accent-color);
    font-feature-settings: "tnum";
}

/* Loading */
.loading-state {
    grid-column: 1 / -1;
    text-align: center;
    padding: 4rem;
    color: var(--text-secondary);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(56, 189, 248, 0.1);
    border-radius: 50%;
    border-top-color: var(--accent-color);
    animation: spin 1s linear infinite;
    margin: 0 auto 1rem;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
    border-top: 1px solid var(--card-border);
    margin-top: auto;
}

footer a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.2s;
}

footer a:hover {
    color: var(--text-primary);
}

.last-updated {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: -1rem;
    margin-bottom: 2rem;
}

/* Responsive */
@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }

    .controls {
        flex-direction: column;
        align-items: stretch;
    }

    .search-box {
        min-width: 100%;
    }
}