:root {
    --bg-color: #0f172a;
    --primary-color: #38bdf8;
    --secondary-color: #818cf8;
    --text-color: #f1f5f9;
    --card-bg: rgba(30, 41, 59, 0.7);
    --glass-border: rgba(255, 255, 255, 0.1);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    background-image:
        radial-gradient(circle at 10% 20%, rgba(56, 189, 248, 0.1) 0%, transparent 40%),
        radial-gradient(circle at 90% 80%, rgba(129, 140, 248, 0.1) 0%, transparent 40%);
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
}

header {
    text-align: center;
    margin-bottom: 4rem;
    animation: fadeInDown 1s ease-out;
}

.badge {
    display: inline-block;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, rgba(56, 189, 248, 0.2), rgba(129, 140, 248, 0.2));
    border: 1px solid var(--glass-border);
    border-radius: 9999px;
    color: var(--primary-color);
    font-size: 0.875rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    backdrop-filter: blur(10px);
}

h1 {
    font-size: 4rem;
    font-weight: 800;
    letter-spacing: -0.05em;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, #fff 0%, #94a3b8 100%);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

.subtitle {
    font-size: 1.25rem;
    color: #94a3b8;
    max-width: 600px;
    margin: 0 auto;
    line-height: 1.6;
}

.search-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: 1.5rem;
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(20px);
    width: 100%;
    max-width: 500px;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    transform: translateY(0);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    animation: fadeInUp 1s ease-out 0.2s backwards;
}

.search-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 30px 60px -12px rgba(56, 189, 248, 0.15);
}

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

input {
    width: 100%;
    padding: 1rem 1.5rem;
    background: rgba(15, 23, 42, 0.6);
    border: 2px solid var(--glass-border);
    border-radius: 0.75rem;
    color: white;
    font-size: 1.125rem;
    transition: all 0.3s ease;
    outline: none;
}

input:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 4px rgba(56, 189, 248, 0.1);
}

button {
    width: 100%;
    padding: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: none;
    border-radius: 0.75rem;
    color: white;
    font-weight: 700;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

button:hover {
    opacity: 0.9;
    transform: scale(1.02);
}

button:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.result-area {
    margin-top: 1.5rem;
    background: rgba(15, 23, 42, 0.8);
    border-radius: 0.75rem;
    padding: 1rem;
    display: none;
    position: relative;
    overflow: hidden;
}

.result-area.active {
    display: block;
    animation: fadeIn 0.5s ease;
}

pre {
    color: #a5b4fc;
    font-family: 'Fira Code', monospace;
    font-size: 0.875rem;
    white-space: pre-wrap;
    word-break: break-all;
}

.error-msg {
    color: #ef4444;
    text-align: center;
    margin-top: 1rem;
    display: none;
}

.api-docs {
    width: 100%;
    max-width: 800px;
    margin-top: 4rem;
    animation: fadeInUp 1s ease-out 0.3s backwards;
}

.api-docs h2 {
    text-align: center;
    margin-bottom: 1.5rem;
    color: white;
    font-size: 1.5rem;
}

.code-block {
    background: #1e293b;
    border: 1px solid var(--glass-border);
    border-radius: 1rem;
    overflow: hidden;
}

.code-header {
    background: rgba(0, 0, 0, 0.3);
    padding: 0.75rem 1.5rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--glass-border);
    font-family: 'Fira Code', monospace;
    font-size: 0.9rem;
    color: #94a3b8;
}

.method {
    background: var(--primary-color);
    color: #0f172a;
    padding: 0.2rem 0.5rem;
    border-radius: 0.25rem;
    font-weight: bold;
    font-size: 0.75rem;
}

.code-content {
    padding: 1.5rem;
    overflow-x: auto;
}

.comment {
    color: #64748b;
    font-style: italic;
}

.features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 2rem;
    width: 100%;
    max-width: 900px;
    margin-top: 4rem;
    animation: fadeInUp 1s ease-out 0.4s backwards;
}

.feature-item {
    text-align: center;
    padding: 1.5rem;
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--glass-border);
    border-radius: 1rem;
    transition: all 0.3s ease;
}

.feature-item:hover {
    background: rgba(255, 255, 255, 0.05);
    transform: translateY(-5px);
}

.feature-icon {
    margin-bottom: 1rem;
    display: inline-block;
    color: var(--primary-color);
}

.feature-icon svg {
    opacity: 0.8;
}

.feature-title {
    font-weight: 700;
    margin-bottom: 0.5rem;
    color: white;
}

.feature-desc {
    font-size: 0.875rem;
    color: #94a3b8;
}

.section-icon {
    vertical-align: middle;
    margin-right: 0.5rem;
    margin-bottom: 0.2rem;
    color: var(--primary-color);
}

.footer-icon {
    vertical-align: middle;
    margin: 0 0.2rem;
    color: #ef4444;
    /* Keep heart red but flat? Or make it monochrome? User asked for not colorful. Let's make it inherit or specific color. */
    color: currentColor;
}

footer {
    padding: 2rem;
    text-align: center;
    color: #64748b;
    font-size: 0.875rem;
    border-top: 1px solid var(--glass-border);
}

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

a:hover {
    color: var(--secondary-color);
}

@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

/* Response syntax highlighting */
.key {
    color: #38bdf8;
}

.string {
    color: #a5b4fc;
}

.number {
    color: #fda4af;
}