:root {
    --bg-start: #3D99E5;
    --bg-end: #88C4F4;
    --glass-bg: rgba(255, 255, 255, 0.4);
    --glass-border: rgba(255, 255, 255, 0.6);
    --text-color: #0D2F4D;
    --text-shadow-color: rgba(255, 255, 255, 0.7);
    --highlight-color: #78D5FA;
    --button-bg: linear-gradient(145deg, rgba(255,255,255,0.5), rgba(255,255,255,0.2));
    --button-hover-bg: linear-gradient(145deg, rgba(255,255,255,0.7), rgba(255,255,255,0.4));
    --button-active-bg: linear-gradient(to bottom, #A1E2FA, #78D5FA);
    --shadow-color: rgba(0, 0, 0, 0.1);
    --font-family: 'Figtree', sans-serif;
}

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

body {
    font-family: var(--font-family);
    color: var(--text-color);
    background-color: var(--bg-start);
    background-image: 
        radial-gradient(circle at 10% 20%, rgba(255,255,255,0.3) 0%, rgba(255,255,255,0) 25%),
        radial-gradient(circle at 85% 70%, rgba(255,255,255,0.4) 0%, rgba(255,255,255,0) 30%),
        linear-gradient(to bottom, var(--bg-start), var(--bg-end));
    background-attachment: fixed;
    min-height: 100vh;
    padding: 2rem;
    display: flex;
    justify-content: center;
    align-items: flex-start;
}

.container {
    width: 100%;
    max-width: 1400px;
    background: var(--glass-bg);
    border-radius: 20px;
    border: 1px solid var(--glass-border);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    box-shadow: 0 8px 32px 0 var(--shadow-color);
    padding: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.main-header {
    text-align: center;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--glass-border);
}

.main-header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    text-shadow: 1px 1px 2px var(--text-shadow-color);
}

.main-header p {
    font-size: 1.1rem;
    opacity: 0.9;
    margin-top: 0.25rem;
}

.controls-panel {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 1.5rem;
}

.control-section {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 15px;
    padding: 1rem 1.5rem;
}

.control-section h2 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 1rem;
    text-shadow: 1px 1px 1px var(--text-shadow-color);
}

.button-group {
    display: flex;
    flex-wrap: wrap;
    gap: 0.75rem;
}

.button {
    padding: 0.6rem 1.2rem;
    font-family: var(--font-family);
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-color);
    background: var(--button-bg);
    border: 1px solid var(--glass-border);
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease-in-out;
    box-shadow: 0 2px 5px var(--shadow-color);
    text-shadow: 1px 1px 1px rgba(255, 255, 255, 0.5);
}

.button:hover {
    background: var(--button-hover-bg);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px var(--shadow-color);
}

.button.active {
    background: var(--button-active-bg);
    color: #fff;
    text-shadow: 0 1px 2px rgba(0, 0, 0, 0.2);
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.15);
    transform: translateY(0);
}

.search-and-stats-wrapper {
    display: flex;
    gap: 1.5rem;
    flex-wrap: wrap;
    align-items: center;
}

.search-bar {
    flex-grow: 1;
    min-width: 250px;
    padding: 0.8rem 1.2rem;
    font-family: var(--font-family);
    font-size: 1rem;
    color: var(--text-color);
    background: var(--glass-bg);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    box-shadow: inset 0 2px 4px var(--shadow-color);
    transition: all 0.2s ease-in-out;
}

.search-bar::placeholder {
    color: var(--text-color);
    opacity: 0.6;
}

.search-bar:focus {
    outline: none;
    box-shadow: 0 0 0 3px var(--highlight-color), inset 0 2px 4px var(--shadow-color);
}

.stats-container {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    background: rgba(0,0,0,0.05);
    padding: 0.5rem 1rem;
    border-radius: 10px;
}

.stats-container p {
    font-size: 0.9rem;
}

.stats-container p span {
    font-weight: 600;
}

.results-container {
    min-height: 300px;
    position: relative;
}

.name-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
    gap: 1rem;
    padding-top: 1rem;
}

.name-card {
    background: var(--button-bg);
    padding: 1rem;
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    text-align: center;
    font-size: 1rem;
    word-break: break-word;
    box-shadow: 0 2px 5px var(--shadow-color);
    transition: all 0.2s ease-in-out;
}

.name-card:hover {
    transform: scale(1.05) translateY(-3px);
    background: var(--button-hover-bg);
    box-shadow: 0 6px 12px var(--shadow-color);
}

.spinner {
    width: 60px;
    height: 60px;
    border: 6px solid rgba(255, 255, 255, 0.3);
    border-top-color: #fff;
    border-radius: 50%;
    animation: spin 1s linear infinite;
    position: absolute;
    top: 40%;
    left: 50%;
    transform: translate(-50%, -50%);
    display: none;
}

.error-message {
    color: #b33939;
    font-size: 1.2rem;
    font-weight: 600;
    text-align: center;
    padding: 4rem 1rem;
    background: rgba(255, 200, 200, 0.5);
    border-radius: 15px;
    display: none;
}

#nameGrid:empty:not(:has(+ .spinner[style*="block"]))::before {
    content: 'No results found. Try a different filter or search term.';
    color: var(--text-color);
    font-size: 1.2rem;
    text-align: center;
    padding: 4rem 1rem;
    display: block;
    grid-column: 1 / -1;
    opacity: 0.7;
}

@keyframes spin {
  to { transform: translate(-50%, -50%) rotate(360deg); }
}

@media (max-width: 768px) {
    body {
        padding: 1rem;
    }
    .container {
        padding: 1.5rem;
    }
    .main-header h1 {
        font-size: 2rem;
    }
    .search-and-stats-wrapper {
        flex-direction: column;
        align-items: stretch;
    }
    .name-grid {
        grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    }
}