:root {
    --bg-color: #05070a;
    --card-bg: rgba(255, 255, 255, 0.03);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --accent-color: #3b82f6;
    --accent-glow: rgba(59, 130, 246, 0.5);
    --secondary-accent: #8b5cf6;
    --danger: #ef4444;
    --glass-blur: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.5;
    overflow-x: hidden;
    min-height: 100vh;
}

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

.blob {
    position: absolute;
    filter: blur(80px);
    opacity: 0.4;
    border-radius: 50%;
    animation: blob-float 20s infinite alternate;
}

.blob-1 {
    width: 400px;
    height: 400px;
    background: var(--accent-color);
    top: -100px;
    right: -100px;
}

.blob-2 {
    width: 300px;
    height: 300px;
    background: var(--secondary-accent);
    bottom: -50px;
    left: -50px;
    animation-delay: -5s;
}

.blob-3 {
    width: 250px;
    height: 250px;
    background: #0ea5e9;
    top: 40%;
    left: 20%;
    animation-delay: -10s;
}

@keyframes blob-float {
    from { transform: translate(0, 0) scale(1); }
    to { transform: translate(100px, 50px) scale(1.1); }
}

/* Layout */
.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 40px 20px;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

/* Glass Effect */
.glass {
    background: var(--card-bg);
    backdrop-filter: blur(var(--glass-blur));
    -webkit-backdrop-filter: blur(var(--glass-blur));
    border: 1px solid var(--card-border);
    border-radius: 24px;
}

/* Header */
.header {
    text-align: center;
}

.logo {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    margin-bottom: 8px;
}

.logo-icon {
    color: var(--accent-color);
    filter: drop-shadow(0 0 8px var(--accent-glow));
}

.logo h1 {
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.02em;
}

.logo h1 span {
    color: var(--accent-color);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
    font-weight: 300;
}

/* Generator Card */
.generator-card {
    padding: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 32px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3);
}

.pin-display {
    display: flex;
    gap: 16px;
}

.digit {
    width: 64px;
    height: 80px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--card-border);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    font-weight: 700;
    font-family: 'JetBrains Mono', monospace;
    transition: var(--transition);
}

.digit.animate {
    animation: digit-pop 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

@keyframes digit-pop {
    0% { transform: scale(0.8); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

/* Buttons */
.actions {
    display: flex;
    gap: 12px;
    width: 100%;
}

.btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 24px;
    border-radius: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-family: inherit;
    font-size: 0.95rem;
}

.btn.primary {
    background: var(--accent-color);
    color: white;
    flex: 1;
    box-shadow: 0 4px 15px var(--accent-glow);
}

.btn.primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--accent-glow);
}

.btn.secondary {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    width: 52px;
    padding: 0;
}

.btn.secondary:hover {
    background: rgba(255, 255, 255, 0.15);
}

.btn.ghost {
    background: transparent;
    border: 1px solid var(--card-border);
    color: var(--text-primary);
}

.btn.ghost:hover {
    background: rgba(255, 255, 255, 0.05);
}

.text-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-size: 0.85rem;
    font-weight: 500;
}

.text-btn:hover {
    color: var(--danger);
}

/* History Section */
.section-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 16px;
}

.section-header h2 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.history-list {
    padding: 12px;
    max-height: 200px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.history-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: 12px;
    animation: slide-in 0.3s ease-out;
}

@keyframes slide-in {
    from { transform: translateX(-10px); opacity: 0; }
    to { transform: translateX(0); opacity: 1; }
}

.history-pin {
    font-family: 'JetBrains Mono', monospace;
    font-weight: 700;
    color: var(--accent-color);
}

.history-time {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.empty-state {
    text-align: center;
    padding: 24px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-style: italic;
}

/* API Playground */
.badge {
    padding: 4px 10px;
    background: rgba(59, 130, 246, 0.1);
    color: var(--accent-color);
    border-radius: 20px;
    font-size: 0.7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    border: 1px solid rgba(59, 130, 246, 0.2);
}

.playground-card {
    padding: 0;
    overflow: hidden;
}

.code-header {
    background: rgba(255, 255, 255, 0.05);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 16px;
    border-bottom: 1px solid var(--card-border);
}

.dots {
    display: flex;
    gap: 6px;
}

.dots span {
    width: 10px;
    height: 10px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
}

.file-name {
    font-size: 0.75rem;
    font-family: 'JetBrains Mono', monospace;
    color: var(--text-secondary);
}

.code-body {
    padding: 20px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
}

.code-body pre {
    white-space: pre-wrap;
}

.k { color: #f472b6; } /* keyword */
.f { color: #60a5fa; } /* function */
.s { color: #fbbf24; } /* string */
.c { color: #64748b; } /* comment */

.playground-actions {
    padding: 0 20px 20px;
}

.api-response-box {
    background: #000;
    margin: 0 20px 20px;
    border-radius: 12px;
    border: 1px solid var(--card-border);
    overflow: hidden;
}

.response-header {
    background: rgba(255, 255, 255, 0.03);
    padding: 8px 16px;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-secondary);
    border-bottom: 1px solid var(--card-border);
}

#response-content {
    padding: 16px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: #4ade80;
    max-height: 150px;
    overflow-y: auto;
}

#response-content.empty {
    color: var(--text-secondary);
}

/* Toast */
.toast {
    position: fixed;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--text-primary);
    color: var(--bg-color);
    padding: 12px 24px;
    border-radius: 30px;
    font-weight: 600;
    font-size: 0.9rem;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 100;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
}

/* Footer */
.footer {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.8rem;
    margin-top: 20px;
}

/* Custom Scrollbar */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: transparent;
}

::-webkit-scrollbar-thumb {
    background: var(--card-border);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

@media (max-width: 480px) {
    .container { padding: 20px 16px; }
    .digit { width: 50px; height: 65px; font-size: 2rem; }
    .generator-card { padding: 24px 16px; }
}