:root {
    --bg-color: #0f172a;
    --card-bg: rgba(30, 41, 59, 0.7);
    --border-color: rgba(255, 255, 255, 0.1);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent: #3b82f6;
    --accent-hover: #2563eb;
    --success: #10b981;
    --error: #ef4444;
    --orb-1: #3b82f6;
    --orb-2: #8b5cf6;
    --orb-3: #ec4899;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
    position: relative;
    overflow-x: hidden;
}

/* Background animated orbs for dynamic design */
.background-orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.3;
    z-index: 0;
    animation: float 20s infinite ease-in-out alternate;
}

.orb-1 {
    width: 400px;
    height: 400px;
    background: var(--orb-1);
    top: -100px;
    left: -100px;
}

.orb-2 {
    width: 300px;
    height: 300px;
    background: var(--orb-2);
    bottom: 10%;
    right: -50px;
    animation-delay: -5s;
}

.orb-3 {
    width: 250px;
    height: 250px;
    background: var(--orb-3);
    top: 40%;
    left: 30%;
    animation-delay: -10s;
}

@keyframes float {
    0% { transform: translate(0, 0); }
    100% { transform: translate(50px, 50px); }
}

.glass-container {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: 24px;
    padding: 2.5rem;
    width: 100%;
    max-width: 800px;
    z-index: 1;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.5);
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

header h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
    background: linear-gradient(135deg, #fff, #94a3b8);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

header p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.5;
}

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

.input-group {
    flex: 1;
    min-width: 250px;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

select {
    width: 100%;
    padding: 0.875rem 1rem;
    border-radius: 12px;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 1rem;
    outline: none;
    transition: all 0.2s;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    background-size: 1rem;
    cursor: pointer;
}

select:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 2px rgba(59, 130, 246, 0.2);
}

select optgroup {
    background: var(--bg-color);
    color: var(--text-primary);
}

.primary-btn {
    background: var(--accent);
    color: #fff;
    border: none;
    padding: 0.875rem 1.5rem;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    min-width: 160px;
    position: relative;
    overflow: hidden;
}

.primary-btn:hover {
    background: var(--accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 15px -3px rgba(59, 130, 246, 0.3);
}

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

.spinner {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255,255,255,0.3);
    border-radius: 50%;
    border-top-color: #fff;
    animation: spin 1s ease-in-out infinite;
    display: none;
    position: absolute;
}

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

.primary-btn.loading .btn-text {
    opacity: 0;
}

.primary-btn.loading .spinner {
    display: block;
}

.hidden {
    display: none !important;
}

.alert {
    padding: 1rem;
    border-radius: 12px;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #fca5a5;
    font-size: 0.9rem;
    line-height: 1.5;
}

.results {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.key-card {
    background: rgba(15, 23, 42, 0.4);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    overflow: hidden;
    animation: fadeUp 0.4s ease-out;
}

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

.card-header {
    padding: 1rem 1.5rem;
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.card-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.tag {
    font-size: 0.7rem;
    padding: 0.2rem 0.5rem;
    background: rgba(59, 130, 246, 0.2);
    color: #93c5fd;
    border-radius: 6px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 700;
}

.download-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 0.4rem 0.75rem;
    border-radius: 8px;
    font-size: 0.85rem;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    gap: 0.4rem;
}

.download-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #fff;
}

.download-btn svg {
    opacity: 0.8;
}

textarea {
    width: 100%;
    height: 180px;
    background: transparent;
    border: none;
    padding: 1.5rem;
    color: #cbd5e1;
    font-family: 'Fira Code', monospace;
    font-size: 0.85rem;
    line-height: 1.5;
    resize: vertical;
    outline: none;
    white-space: pre;
    overflow-x: auto;
}

textarea::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
textarea::-webkit-scrollbar-track {
    background: transparent;
}
textarea::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.2);
    border-radius: 4px;
}
textarea::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.3);
}

@media (max-width: 600px) {
    .glass-container {
        padding: 1.5rem;
    }
    .input-group, .primary-btn {
        width: 100%;
    }
    .card-header {
        flex-direction: column;
        align-items: flex-start;
        gap: 1rem;
    }
    .download-btn {
        width: 100%;
        justify-content: center;
    }
}