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

:root {
    --bg-primary: #0a0e17;
    --bg-secondary: #111827;
    --bg-card: #1a2234;
    --bg-hover: #243044;
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --accent-primary: #6366f1;
    --accent-secondary: #14b8a6;
    --accent-glow: rgba(99, 102, 241, 0.4);
    --border-color: #2d3a50;
    --success: #22c55e;
    --danger: #ef4444;
}

.light {
    --bg-primary: #f1f5f9;
    --bg-secondary: #e2e8f0;
    --bg-card: #ffffff;
    --bg-hover: #f8fafc;
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    --border-color: #cbd5e1;
}

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

.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    background: linear-gradient(135deg, var(--bg-primary) 0%, #0f1629 50%, #0a0e17 100%);
}

.app-header {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.15) 0%, rgba(20, 184, 166, 0.1) 100%);
    border-bottom: 1px solid var(--border-color);
    padding: 1.5rem;
    position: relative;
    overflow: hidden;
}

.app-header::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-primary), var(--accent-secondary), var(--accent-primary));
    background-size: 200% 100%;
    animation: shimmer 3s infinite linear;
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    text-align: center;
    position: relative;
}

.app-title {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    cursor: pointer;
    user-select: none;
}

.sparkle {
    display: inline-block;
    animation: sparkle 2s ease-in-out infinite;
}

@keyframes sparkle {
    0%, 100% { transform: scale(1) rotate(0deg); }
    50% { transform: scale(1.2) rotate(10deg); }
}

.app-subtitle {
    color: var(--text-secondary);
    margin-top: 0.25rem;
    font-size: 0.95rem;
}

.header-actions {
    position: absolute;
    right: 0;
    top: 50%;
    transform: translateY(-50%);
}

.theme-toggle {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.5rem;
    font-size: 1.25rem;
    cursor: pointer;
    transition: all 0.2s;
}

.theme-toggle:hover {
    background: var(--bg-hover);
    transform: scale(1.1);
}

.main-content {
    display: grid;
    grid-template-columns: 340px 1fr;
    gap: 1.5rem;
    padding: 1.5rem;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
    flex: 1;
}

@media (max-width: 900px) {
    .main-content {
        grid-template-columns: 1fr;
    }
}

.left-panel, .right-panel {
    background: var(--bg-secondary);
    border-radius: 16px;
    border: 1px solid var(--border-color);
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.panel-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-card);
}

.panel-title {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.template-btn {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    border: none;
    padding: 0.4rem 0.75rem;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}

.template-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--accent-glow);
}

.templates-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.5rem;
    padding: 0.75rem;
    background: var(--bg-card);
    border-bottom: 1px solid var(--border-color);
}

.template-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
    padding: 0.75rem 0.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s;
    color: var(--text-primary);
    font-family: inherit;
}

.template-card:hover {
    background: var(--bg-hover);
    border-color: var(--accent-primary);
    transform: translateY(-2px);
}

.components-list {
    padding: 0.75rem;
    overflow-y: auto;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.component-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 0.875rem;
    cursor: pointer;
    transition: all 0.25s;
    position: relative;
}

.component-card:not(.opacity-50):hover {
    border-color: var(--accent-primary);
    background: var(--bg-hover);
    transform: translateX(4px);
    box-shadow: -4px 0 0 var(--accent-primary);
}

.component-icon {
    animation: float 3s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-3px); }
}

.add-btn {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    border: 2px solid var(--accent-primary);
    background: transparent;
    color: var(--accent-primary);
    font-size: 1.1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.add-btn:not(.added):hover {
    background: var(--accent-primary);
    color: white;
    box-shadow: 0 0 12px var(--accent-glow);
}

.add-btn.added {
    border-color: var(--success);
    color: var(--success);
    cursor: default;
}

.right-panel {
    max-height: calc(100vh - 180px);
}

@media (max-width: 900px) {
    .right-panel {
        max-height: none;
        min-height: 400px;
    }
}

.score-badge {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    padding: 0.25rem 0.6rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.score-badge.complete {
    background: linear-gradient(135deg, var(--success), var(--accent-secondary));
    border: none;
    color: white;
}

.icon-btn {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 28px;
    height: 28px;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s;
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover:not(:disabled) {
    background: var(--bg-hover);
    color: var(--text-primary);
    border-color: var(--accent-primary);
}

.icon-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.icon-btn.delete:hover {
    border-color: var(--danger);
    color: var(--danger);
}

.clear-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-muted);
    padding: 0.35rem 0.75rem;
    border-radius: 6px;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}

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

.builder-list {
    flex: 1;
    overflow-y: auto;
    padding: 0.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 3rem 1rem;
    text-align: center;
    flex: 1;
}

.builder-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    overflow: hidden;
    transition: all 0.2s;
}

.builder-card:hover {
    border-color: rgba(99, 102, 241, 0.3);
}

.builder-card-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    background: var(--bg-hover);
    border-bottom: 1px solid var(--border-color);
    border-left: 3px solid var(--accent-primary);
}

.builder-textarea {
    width: 100%;
    padding: 1rem;
    background: transparent;
    border: none;
    color: var(--text-primary);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    line-height: 1.6;
    resize: vertical;
    min-height: 100px;
}

.builder-textarea:focus {
    outline: none;
    background: rgba(99, 102, 241, 0.05);
}

.builder-textarea::placeholder {
    color: var(--text-muted);
    font-style: italic;
}

.builder-footer {
    padding: 1rem 1.25rem;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: var(--bg-card);
}

.token-count {
    color: var(--text-muted);
    font-size: 0.8rem;
    font-family: 'JetBrains Mono', monospace;
}

.generate-btn {
    background: linear-gradient(135deg, var(--accent-primary), #4f46e5);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 10px;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s;
    font-family: inherit;
    position: relative;
    overflow: hidden;
}

.generate-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.2), transparent);
    transition: left 0.5s;
}

.generate-btn:hover:not(:disabled)::before {
    left: 100%;
}

.generate-btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px var(--accent-glow);
}

.generate-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.8);
    backdrop-filter: blur(4px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    padding: 1rem;
    animation: fadeIn 0.2s;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

.modal-content {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 16px;
    width: 100%;
    max-width: 700px;
    max-height: 85vh;
    display: flex;
    flex-direction: column;
    animation: slideUp 0.3s;
}

@keyframes slideUp {
    from { transform: translateY(20px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.25rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-title {
    font-size: 1.25rem;
    font-weight: 600;
}

.modal-close {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: var(--danger);
    border-color: var(--danger);
    color: white;
}

.modal-body {
    padding: 1.25rem;
    overflow-y: auto;
    flex: 1;
}

.prompt-output {
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 1.25rem;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    line-height: 1.7;
    color: var(--text-primary);
    white-space: pre-wrap;
    overflow-x: auto;
}

.modal-actions {
    display: flex;
    gap: 0.75rem;
    padding: 1.25rem;
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
}

.copy-btn, .download-btn, .start-over-btn {
    flex: 1;
    min-width: 140px;
    padding: 0.75rem 1rem;
    border-radius: 8px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}

.copy-btn {
    background: linear-gradient(135deg, var(--accent-primary), #4f46e5);
    color: white;
    border: none;
}

.copy-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px var(--accent-glow);
}

.copy-btn.success {
    background: linear-gradient(135deg, var(--success), var(--accent-secondary));
}

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

.download-btn:hover {
    border-color: var(--accent-secondary);
    color: var(--accent-secondary);
}

.start-over-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.start-over-btn:hover {
    border-color: var(--text-primary);
    color: var(--text-primary);
}

.modal-tip {
    padding: 0 1.25rem 1.25rem;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
}

/* Footer */
.app-footer {
    text-align: center;
    padding: 1.5rem;
    color: var(--text-muted);
    font-size: 0.85rem;
    border-top: 1px solid var(--border-color);
}

.app-footer a {
    color: var(--accent-secondary);
    text-decoration: none;
    transition: color 0.2s;
}

.app-footer a:hover {
    color: var(--accent-primary);
}

/* Confetti */
.confetti-container {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    pointer-events: none;
    z-index: 9999;
}

.confetti-particle {
    position: absolute;
    top: -10px;
    width: 10px;
    height: 10px;
    border-radius: 2px;
    animation: confettiFall 2s ease-out forwards;
}

@keyframes confettiFall {
    0% {
        transform: translateY(0) rotate(0deg);
        opacity: 1;
    }
    100% {
        transform: translateY(100vh) rotate(720deg);
        opacity: 0;
    }
}

/* Achievement Badge */
.achievement-badge {
    position: fixed;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    background: linear-gradient(135deg, #fbbf24, #f59e0b);
    color: #0f172a;
    padding: 1.5rem 2.5rem;
    border-radius: 16px;
    font-size: 1.25rem;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    z-index: 10000;
    animation: achievementPop 0.5s ease-out;
    box-shadow: 0 10px 40px rgba(251, 191, 36, 0.5);
}

@keyframes achievementPop {
    0% { transform: translate(-50%, -50%) scale(0); }
    50% { transform: translate(-50%, -50%) scale(1.1); }
    100% { transform: translate(-50%, -50%) scale(1); }
}

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

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--border-color);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}