:root {
    --bg-color: #0f172a;
    --text-color: #f8fafc;
    --glass-bg: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --primary: #8b5cf6;
    --secondary: #ec4899;
    --accent: #06b6d4;
}

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

body {
    background-color: var(--bg-color);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    position: relative;
}

/* Background Animation */
.background-blobs {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    overflow: hidden;
}

.blob {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.6;
    animation: float 10s infinite ease-in-out;
}

.blob-1 {
    width: 400px;
    height: 400px;
    background: var(--primary);
    top: -100px;
    left: -100px;
    animation-delay: 0s;
}

.blob-2 {
    width: 300px;
    height: 300px;
    background: var(--secondary);
    bottom: -50px;
    right: -50px;
    animation-delay: 2s;
}

.blob-3 {
    width: 200px;
    height: 200px;
    background: var(--accent);
    top: 40%;
    left: 40%;
    animation-delay: 4s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    33% { transform: translate(30px, -50px); }
    66% { transform: translate(-20px, 20px); }
}

/* Glassmorphism Container */
.glass-container {
    background: var(--glass-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 3rem;
    width: 90%;
    max-width: 600px;
    box-shadow: 0 8px 32px 0 rgba(0, 0, 0, 0.37);
    text-align: center;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

header h1 {
    font-size: 2.5rem;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
    margin-bottom: 0.5rem;
}

.subtitle {
    opacity: 0.7;
    font-size: 1.1rem;
}

/* Display Area */
.display-area {
    background: rgba(0, 0, 0, 0.2);
    border-radius: 16px;
    padding: 2rem;
    min-height: 180px;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    position: relative;
    border: 1px solid var(--glass-border);
}

.response-box p {
    font-size: 1.5rem;
    line-height: 1.4;
    transition: all 0.3s ease;
}

.category-tag {
    position: absolute;
    top: 10px;
    left: 10px;
    font-size: 0.7rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    background: rgba(255, 255, 255, 0.1);
    padding: 4px 8px;
    border-radius: 4px;
    opacity: 0.8;
}

.copy-btn {
    position: absolute;
    bottom: 10px;
    right: 10px;
    background: transparent;
    border: none;
    color: var(--text-color);
    opacity: 0.5;
    cursor: pointer;
    transition: opacity 0.2s;
}

.copy-btn:hover {
    opacity: 1;
}

/* Controls */
.controls {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.category-selector {
    display: flex;
    justify-content: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.cat-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--glass-border);
    color: var(--text-color);
    padding: 8px 16px;
    border-radius: 20px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.9rem;
}

.cat-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.cat-btn.active {
    background: var(--primary);
    border-color: var(--primary);
    box-shadow: 0 0 15px rgba(139, 92, 246, 0.4);
}

.action-btn {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border: none;
    padding: 1rem 2rem;
    border-radius: 12px;
    color: white;
    font-size: 1.2rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
}

.action-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 6px 20px rgba(0, 0, 0, 0.3);
}

.action-btn:active {
    transform: scale(0.98);
}

/* Utils */
.hidden {
    display: none !important;
}

.loader span {
    font-size: 2rem;
    animation: blink 1.4s infinite both;
}

.loader span:nth-child(2) { animation-delay: 0.2s; }
.loader span:nth-child(3) { animation-delay: 0.4s; }

@keyframes blink {
    0% { opacity: 0.2; }
    20% { opacity: 1; }
    100% { opacity: 0.2; }
}

footer {
    font-size: 0.8rem;
    opacity: 0.5;
}

footer a {
    color: var(--text-color);
    text-decoration: none;
    border-bottom: 1px dotted currentColor;
}