/* ======= CSS Variables (Design System) ======= */
:root {
    /* Light Theme (Default) */
    --bg-color: #f3f6f9;
    --card-bg: #ffffff;
    --text-primary: #1e293b;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #eff6ff;
    --accent-color: #f43f5e;

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.05), 0 2px 4px -2px rgba(0,0,0,0.05);
    --shadow-lg: 0 10px 25px -3px rgba(0,0,0,0.05), 0 4px 6px -4px rgba(0,0,0,0.02);
    --shadow-wheel: 0 20px 60px rgba(37, 99, 235, 0.15);

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-full: 9999px;

    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.dark-mode {
    --bg-color: #0f172a;
    --card-bg: #1e293b;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --border-color: #334155;
    --primary-color: #3b82f6;
    --primary-hover: #60a5fa;
    --primary-light: #1e3a8a;

    --shadow-sm: 0 1px 3px rgba(0,0,0,0.3);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4);
    --shadow-lg: 0 10px 25px -3px rgba(0,0,0,0.5);
    --shadow-wheel: 0 20px 60px rgba(0,0,0,0.5);
}

/* ======= Global Reset ======= */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Outfit', sans-serif;
}

body {
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    transition: background-color 0.3s ease, color 0.3s ease;
}

.d-none { display: none !important; }

/* ======= Layout ======= */
.app-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* ======= Header ======= */
.header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 0;
    border-bottom: 1px solid var(--border-color);
    margin-bottom: 2rem;
}

.logo-link {
    text-decoration: none;
    color: inherit;
}

.logo-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo {
    width: 40px;
    height: 40px;
}

.app-name {
    font-size: 1.5rem;
    font-weight: 700;
    letter-spacing: -0.5px;
}
.app-name span { color: var(--primary-color); }

.header-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}
.nav-link:hover { color: var(--primary-color); }

.icon-btn {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: var(--radius-full);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.25rem;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-sm);
}
.icon-btn:hover {
    background: var(--primary-light);
    color: var(--primary-color);
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

/* ======= Main Content ======= */
.main-content {
    display: grid;
    grid-template-columns: 1fr 480px;
    gap: 3rem;
    align-items: start;
    padding-bottom: 4rem;
}

/* ======= Config Panel ======= */
.config-panel {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.panel-section {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.section-title {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
}

/* ======= Option Items ======= */
.options-list {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.option-item {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    animation: slideIn 0.3s ease;
}

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

.option-color-dot {
    width: 16px;
    height: 16px;
    border-radius: var(--radius-full);
    flex-shrink: 0;
    border: 2px solid var(--border-color);
    transition: var(--transition);
}

.option-item input[type="text"] {
    flex: 1;
    padding: 0.75rem 1rem;
    background: var(--bg-color);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    border-radius: var(--radius-md);
    font-size: 1rem;
    transition: var(--transition);
    outline: none;
}

.option-item input[type="text"]:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px var(--primary-light);
}

.option-item input[type="text"]::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

.btn-remove {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 38px;
    height: 38px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.15rem;
    cursor: pointer;
    transition: var(--transition);
    flex-shrink: 0;
}
.btn-remove:hover {
    background: #fef2f2;
    border-color: #f43f5e;
    color: #f43f5e;
}
.dark-mode .btn-remove:hover {
    background: rgba(244, 63, 94, 0.15);
}

.btn-add {
    width: 100%;
    padding: 0.75rem;
    border-radius: var(--radius-md);
    border: 2px dashed var(--border-color);
    background: transparent;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 1rem;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    transition: var(--transition);
}
.btn-add:hover {
    border-color: var(--primary-color);
    color: var(--primary-color);
    background: var(--primary-light);
}

.option-count {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-align: right;
    margin-top: 0.5rem;
}

/* ======= Palette Section ======= */
.palette-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 0.75rem;
}

.palette-btn {
    position: relative;
    border: 2px solid var(--border-color);
    background: var(--card-bg);
    border-radius: var(--radius-md);
    padding: 0.75rem;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
}

.palette-btn:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.palette-btn.active {
    border-color: var(--primary-color);
    background: var(--primary-light);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.15);
}

.palette-preview {
    display: flex;
    width: 100%;
    height: 24px;
    border-radius: 6px;
    overflow: hidden;
}

.palette-preview span {
    flex: 1;
}

.palette-name {
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.palette-btn.active .palette-name {
    color: var(--primary-color);
    font-weight: 600;
}

/* ======= Wheel Panel ======= */
.wheel-panel {
    position: sticky;
    top: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.wheel-card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-wheel);
    border: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 1.5rem;
}

.wheel-wrapper {
    position: relative;
    width: 100%;
    max-width: 420px;
    aspect-ratio: 1;
}

.wheel-pointer {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    z-index: 10;
    filter: drop-shadow(0 2px 4px rgba(0,0,0,0.3));
}

#wheel-canvas {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    cursor: pointer;
    transition: filter 0.3s ease;
}
#wheel-canvas:hover {
    filter: brightness(1.05);
}

.btn-spin {
    padding: 1rem 3rem;
    border-radius: var(--radius-full);
    border: none;
    background: linear-gradient(135deg, var(--primary-color), #7c3aed);
    color: white;
    font-weight: 700;
    font-size: 1.15rem;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 15px rgba(37, 99, 235, 0.35);
    display: flex;
    align-items: center;
    gap: 0.6rem;
    letter-spacing: 0.5px;
}
.btn-spin:hover {
    transform: translateY(-3px) scale(1.03);
    box-shadow: 0 8px 25px rgba(37, 99, 235, 0.45);
}
.btn-spin:active {
    transform: translateY(0) scale(0.98);
}
.btn-spin:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}
.btn-spin i {
    font-size: 1.3rem;
    transition: transform 0.3s ease;
}
.btn-spin:hover i {
    transform: rotate(90deg);
}

.spin-hint {
    font-size: 0.85rem;
    color: var(--text-secondary);
    text-align: center;
}

/* ======= Result Modal ======= */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.6);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s ease, visibility 0.3s ease;
}
.modal-overlay.active {
    opacity: 1;
    visibility: visible;
}

.modal-content {
    background: var(--card-bg);
    border-radius: var(--radius-lg);
    padding: 3rem;
    text-align: center;
    max-width: 440px;
    width: 90%;
    box-shadow: 0 25px 60px rgba(0,0,0,0.3);
    border: 1px solid var(--border-color);
    transform: scale(0.8) translateY(20px);
    transition: transform 0.4s cubic-bezier(0.34, 1.56, 0.64, 1);
}
.modal-overlay.active .modal-content {
    transform: scale(1) translateY(0);
}

.modal-emoji {
    font-size: 4rem;
    margin-bottom: 1rem;
    animation: bounce 0.6s ease;
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-15px); }
}

.modal-label {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    font-weight: 500;
}

.modal-result {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 2rem;
    word-break: break-word;
}

.modal-result-color {
    display: inline-block;
    width: 16px;
    height: 16px;
    border-radius: var(--radius-full);
    margin-right: 0.5rem;
    vertical-align: middle;
    border: 2px solid var(--border-color);
}

.modal-actions {
    display: flex;
    gap: 1rem;
    justify-content: center;
}

.btn-modal {
    padding: 0.75rem 1.5rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.btn-modal-primary {
    background: linear-gradient(135deg, var(--primary-color), #7c3aed);
    color: white;
    box-shadow: 0 4px 10px rgba(37, 99, 235, 0.2);
}
.btn-modal-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(37, 99, 235, 0.3);
}

.btn-modal-secondary {
    background: var(--bg-color);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}
.btn-modal-secondary:hover {
    background: var(--border-color);
}

/* ======= Confetti Canvas ======= */
#confetti-canvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 1001;
}

/* ======= Responsive ======= */
@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr;
    }
    .wheel-panel {
        position: static;
        max-width: 520px;
        margin: 0 auto;
        width: 100%;
    }
}

@media (max-width: 640px) {
    .app-container {
        padding: 0 1rem;
    }
    .header {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
    .panel-section {
        padding: 1.25rem;
    }
    .wheel-card {
        padding: 1.25rem;
    }
    .modal-content {
        padding: 2rem 1.5rem;
    }
    .modal-result {
        font-size: 1.5rem;
    }
    .palette-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .modal-actions {
        flex-direction: column;
    }
}