/* CSS Variables for Theme */
:root {
    /* Light Mode Colors */
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --text-primary: #212529;
    --text-secondary: #6c757d;
    --accent-primary: #6366f1;
    --accent-secondary: #8b5cf6;
    --accent-hover: #4f46e5;
    --border-color: #dee2e6;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.15);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.2);
}

[data-theme="dark"] {
    /* Dark Mode Colors */
    --bg-primary: #1a1a1a;
    --bg-secondary: #2d2d2d;
    --bg-tertiary: #3d3d3d;
    --text-primary: #f8f9fa;
    --text-secondary: #adb5bd;
    --accent-primary: #818cf8;
    --accent-secondary: #a78bfa;
    --accent-hover: #6366f1;
    --border-color: #404040;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 25px rgba(0, 0, 0, 0.4);
    --shadow-xl: 0 20px 40px rgba(0, 0, 0, 0.5);
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background: var(--bg-primary);
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(99, 102, 241, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(139, 92, 246, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(99, 102, 241, 0.05) 0%, transparent 70%),
        linear-gradient(135deg, rgba(99, 102, 241, 0.02) 0%, rgba(139, 92, 246, 0.02) 100%);
    color: var(--text-primary);
    transition: background-color 0.3s ease, color 0.3s ease;
    min-height: 100vh;
    line-height: 1.6;
    position: relative;
    overflow-x: hidden;
}

[data-theme="dark"] body {
    background-image: 
        radial-gradient(circle at 20% 30%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 80% 70%, rgba(139, 92, 246, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 50% 50%, rgba(99, 102, 241, 0.08) 0%, transparent 70%),
        linear-gradient(135deg, rgba(99, 102, 241, 0.05) 0%, rgba(139, 92, 246, 0.05) 100%);
}

/* Animated background particles */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(2px 2px at 20% 30%, rgba(99, 102, 241, 0.3), transparent),
        radial-gradient(2px 2px at 60% 70%, rgba(139, 92, 246, 0.3), transparent),
        radial-gradient(1px 1px at 50% 50%, rgba(99, 102, 241, 0.2), transparent);
    background-size: 200% 200%;
    animation: backgroundMove 20s ease infinite;
    pointer-events: none;
    z-index: 0;
    opacity: 0.4;
}

@keyframes backgroundMove {
    0%, 100% {
        background-position: 0% 0%, 100% 100%, 50% 50%;
    }
    50% {
        background-position: 100% 100%, 0% 0%, 50% 50%;
    }
}

[data-theme="dark"] body::before {
    opacity: 0.6;
}

/* Navigation Bar */
.navbar {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border-color);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
    transition: all 0.3s ease;
}

[data-theme="dark"] .navbar {
    background: rgba(26, 26, 26, 0.8);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
}

.nav-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.brand-icon {
    font-size: 1.5rem;
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

.nav-link {
    color: var(--text-primary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 0.5rem 1rem;
    border-radius: 8px;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: transparent;
    border: none;
    cursor: pointer;
    font-family: inherit;
}

.nav-link:hover {
    background: var(--bg-secondary);
    color: var(--accent-primary);
}

.theme-toggle-nav {
    width: 40px;
    height: 40px;
    padding: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.theme-icon-nav {
    font-size: 1.25rem;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
    min-height: calc(100vh - 100px);
    position: relative;
    z-index: 1;
}

/* Header */
.header {
    text-align: center;
    margin-bottom: 2rem;
    position: relative;
}

.title {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
    letter-spacing: -0.02em;
    animation: fadeInDown 0.6s ease-out;
}

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

.subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    font-weight: 400;
}

.theme-toggle {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 50%;
    width: 48px;
    height: 48px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: var(--shadow-sm);
}

.theme-toggle:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-md);
}

.theme-icon {
    font-size: 1.5rem;
}

/* Main Content */
.main-content {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 2rem;
    align-items: start;
}

/* Input Section */
.input-section {
    background: rgba(255, 255, 255, 0.7);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: 20px;
    padding: 1.5rem;
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    position: sticky;
    top: 90px;
    animation: fadeInLeft 0.6s ease-out;
}

[data-theme="dark"] .input-section {
    background: rgba(45, 45, 45, 0.7);
}

@keyframes fadeInLeft {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

.input-header {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.input-label {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.label-icon {
    font-size: 1.2rem;
}

.input-hint {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin: 0;
}

.input-hint kbd {
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    padding: 0.2rem 0.4rem;
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 0.75rem;
    box-shadow: 0 1px 2px rgba(0, 0, 0, 0.1);
}

/* Preset Examples */
.preset-examples {
    background: var(--bg-tertiary);
    border-radius: 12px;
    padding: 1rem;
    border: 1px solid var(--border-color);
}

.preset-label {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.preset-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.preset-btn {
    display: flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 0.875rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--text-primary);
    font-family: inherit;
}

.preset-btn:hover {
    background: var(--accent-primary);
    color: white;
    border-color: var(--accent-primary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-sm);
}

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

.preset-icon {
    font-size: 1rem;
}

.preset-text {
    font-weight: 600;
}

/* Input Stats */
.input-stats {
    display: flex;
    justify-content: center;
    padding: 0.75rem;
    background: var(--bg-tertiary);
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

.stat-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.95rem;
}

.stat-icon {
    font-size: 1.1rem;
}

.stat-value {
    font-weight: 700;
    color: var(--accent-primary);
    font-size: 1.2rem;
}

.stat-label {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.item-input {
    width: 100%;
    padding: 0.875rem;
    border: 2px solid var(--border-color);
    border-radius: 12px;
    background: var(--bg-primary);
    color: var(--text-primary);
    font-size: 0.95rem;
    font-family: inherit;
    resize: vertical;
    transition: all 0.3s ease;
    min-height: 120px;
    max-height: 200px;
    line-height: 1.6;
}

.item-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 
        0 0 0 3px rgba(99, 102, 241, 0.1),
        0 4px 12px rgba(99, 102, 241, 0.15);
    transform: translateY(-1px);
}

.item-input::placeholder {
    color: var(--text-secondary);
    opacity: 0.6;
}

.input-actions {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.sound-toggle-wrapper {
    display: flex;
    align-items: center;
}

.sound-toggle-label {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    user-select: none;
}

.sound-toggle-label input[type="checkbox"] {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--accent-primary);
}

.sound-toggle-text {
    font-size: 0.95rem;
    color: var(--text-primary);
}

/* Wheel Section */
.wheel-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 3rem;
    animation: fadeInRight 0.6s ease-out;
}

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

.wheel-container {
    position: relative;
    width: 100%;
    max-width: 500px;
    aspect-ratio: 1;
    margin: 0 auto;
}

#wheelCanvas {
    width: 100%;
    height: 100%;
    border-radius: 50%;
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.2),
        0 0 0 1px rgba(255, 255, 255, 0.1) inset;
    transition: transform 0.1s ease-out;
    background: radial-gradient(circle at center, rgba(255, 255, 255, 0.1), transparent);
}

[data-theme="dark"] #wheelCanvas {
    box-shadow: 
        0 20px 40px rgba(0, 0, 0, 0.5),
        0 0 0 1px rgba(255, 255, 255, 0.05) inset;
}

.wheel-pointer {
    position: absolute;
    top: -20px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 20px solid transparent;
    border-right: 20px solid transparent;
    border-top: 30px solid var(--accent-primary);
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
    z-index: 10;
}

.wheel-hint {
    position: absolute;
    bottom: -60px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.5rem 1rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 20px;
    font-size: 0.875rem;
    color: var(--text-secondary);
    white-space: nowrap;
    opacity: 0.7;
    transition: opacity 0.3s ease;
    pointer-events: none;
}

.wheel-hint:hover {
    opacity: 1;
}

.hint-icon {
    font-size: 1rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-5px);
    }
}

.hint-text {
    font-weight: 500;
}

/* Buttons */
.btn {
    padding: 1rem 2rem;
    border: none;
    border-radius: 12px;
    font-size: 1.1rem;
    font-weight: 600;
    bottom: -30px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-family: inherit;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    box-shadow: var(--shadow-md);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none !important;
}

.btn-spin {
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    color: white;
    padding: 1.25rem 3rem;
    font-size: 1.25rem;
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
}

.btn-spin::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;
}

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

.btn-spin:not(:disabled):hover {
    transform: translateY(-2px);
    box-shadow: 
        0 15px 35px rgba(99, 102, 241, 0.4),
        0 5px 15px rgba(0, 0, 0, 0.2);
}

.btn-spin:not(:disabled):active {
    transform: translateY(0);
    box-shadow: var(--shadow-lg);
}

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

.btn-clear:hover {
    background: var(--bg-tertiary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: var(--text-secondary);
}

.btn-icon {
    font-size: 1rem;
}

.btn-remove {
    background: linear-gradient(135deg, #ef4444, #dc2626);
    color: white;
}

.btn-remove:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-close {
    background: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn-close:hover {
    background: var(--bg-tertiary);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

/* Modal */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 1000;
    backdrop-filter: blur(5px);
    animation: fadeIn 0.3s ease;
}

.modal-overlay.active {
    display: flex;
}

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

.modal-content {
    background: var(--bg-primary);
    border-radius: 24px;
    padding: 3rem;
    max-width: 500px;
    width: 90%;
    box-shadow: var(--shadow-xl);
    border: 1px solid var(--border-color);
    animation: slideUp 0.3s ease;
    text-align: center;
}

@keyframes slideUp {
    from {
        transform: translateY(30px);
        opacity: 0;
    }
    to {
        transform: translateY(0);
        opacity: 1;
    }
}

.modal-header {
    margin-bottom: 1.5rem;
}

.modal-title {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
}

.modal-body {
    margin-bottom: 2rem;
}

.winner-text {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    padding: 1rem;
    word-break: break-word;
}

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

/* Responsive Design */
@media (max-width: 1024px) {
    .main-content {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .input-section {
        position: static;
        top: auto;
    }

    .wheel-container {
        max-width: 450px;
    }
    
    .nav-container {
        padding: 1rem 1.5rem;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 1rem;
    }

    .title {
        font-size: 2rem;
    }

    .subtitle {
        font-size: 0.95rem;
    }

    .input-section {
        padding: 1.25rem;
    }

    .wheel-container {
        max-width: 100%;
    }

    .btn-spin {
        padding: 1rem 2rem;
        font-size: 1.1rem;
    }

    .modal-content {
        padding: 2rem;
    }

    .winner-text {
        font-size: 1.8rem;
    }
    
    .nav-container {
        padding: 0.75rem 1rem;
    }
    
    .nav-brand {
        font-size: 1.1rem;
    }
    
    .nav-menu {
        gap: 0.75rem;
    }
    
    .nav-link {
        font-size: 0.875rem;
        padding: 0.4rem 0.75rem;
    }
}

@media (max-width: 480px) {
    .title {
        font-size: 1.5rem;
    }

    .main-content {
        gap: 2rem;
    }

    .input-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .modal-footer {
        flex-direction: column;
    }

    .modal-footer .btn {
        width: 100%;
    }

    .preset-buttons {
        justify-content: center;
    }

    .preset-btn {
        flex: 1;
        min-width: calc(50% - 0.25rem);
        justify-content: center;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }
}


/* Footer */
.footer {
    margin-top: 3rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.5);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    margin-left: -2rem;
    margin-right: -2rem;
    padding-left: 2rem;
    padding-right: 2rem;
    padding-bottom: 2rem;
}

[data-theme="dark"] .footer {
    background: rgba(45, 45, 45, 0.5);
}

.footer-content {
    max-width: 1400px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-section {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.footer-title {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-primary), var(--accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.footer-description {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

.footer-heading {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.footer-links li {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

.footer-bottom {
    max-width: 1400px;
    margin: 0 auto;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Smooth transitions */
* {
    transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
}

/* Loading state */
.spinning {
    animation: spin 0.1s linear infinite;
}

@keyframes spin {
    from {
        transform: rotate(0deg);
    }
    to {
        transform: rotate(360deg);
    }
}