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

:root {
    --primary-color: #6366f1;
    --primary-hover: #4f46e5;
    --secondary-color: #64748b;
    --success-color: #22c55e;
    --danger-color: #ef4444;
    --background: #0f172a;
    --surface: #1e293b;
    --surface-light: #334155;
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --border-color: #475569;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -2px rgba(0, 0, 0, 0.3);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.4), 0 4px 6px -4px rgba(0, 0, 0, 0.4);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--background);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    line-height: 1.6;
}

.container {
    flex: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem 1rem;
    width: 100%;
}

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

header h1 {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), #a78bfa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

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

/* Input Section */
.input-section {
    background: var(--surface);
    border-radius: 1rem;
    padding: 1.5rem;
    box-shadow: var(--shadow);
}

.input-group {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1.5rem;
}

#optionInput {
    flex: 1;
    padding: 0.875rem 1rem;
    border: 2px solid var(--border-color);
    border-radius: 0.5rem;
    background: var(--surface-light);
    color: var(--text-primary);
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

#optionInput:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.2);
}

#optionInput::placeholder {
    color: var(--text-secondary);
}

/* Button Styles */
.btn {
    padding: 0.875rem 1.5rem;
    border: none;
    border-radius: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

.btn-primary {
    background: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-1px);
}

.btn-secondary {
    background: var(--surface-light);
    color: var(--text-primary);
    border: 2px solid var(--border-color);
}

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

.btn-spin {
    width: 100%;
    padding: 1rem 2rem;
    font-size: 1.25rem;
    background: linear-gradient(135deg, var(--primary-color), #a78bfa);
    color: white;
    margin-top: 1.5rem;
}

.btn-spin:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

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

.btn-danger {
    background: transparent;
    color: var(--danger-color);
    padding: 0.25rem 0.5rem;
    font-size: 0.875rem;
}

.btn-danger:hover {
    background: rgba(239, 68, 68, 0.1);
}

/* Options List */
.options-container h3 {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

#optionCount {
    font-weight: 400;
}

#optionsList {
    list-style: none;
    max-height: 300px;
    overflow-y: auto;
    margin-bottom: 1rem;
}

#optionsList::-webkit-scrollbar {
    width: 6px;
}

#optionsList::-webkit-scrollbar-track {
    background: var(--surface-light);
    border-radius: 3px;
}

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

.option-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.75rem 1rem;
    background: var(--surface-light);
    border-radius: 0.5rem;
    margin-bottom: 0.5rem;
    animation: slideIn 0.3s ease;
}

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

.option-item span {
    flex: 1;
    word-break: break-word;
}

.option-color {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    margin-right: 0.75rem;
    flex-shrink: 0;
}

.option-item.removing {
    animation: slideOut 0.3s ease forwards;
}

@keyframes slideOut {
    to {
        opacity: 0;
        transform: translateX(10px);
        height: 0;
        padding: 0;
        margin: 0;
    }
}

/* Settings */
.settings {
    padding-top: 1rem;
    border-top: 1px solid var(--border-color);
}

.checkbox-label {
    display: flex;
    align-items: center;
    cursor: pointer;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.checkbox-label input {
    display: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    margin-right: 0.75rem;
    position: relative;
    transition: all 0.2s;
}

.checkbox-label input:checked + .checkmark {
    background: var(--primary-color);
    border-color: var(--primary-color);
}

.checkbox-label input:checked + .checkmark::after {
    content: '';
    position: absolute;
    left: 6px;
    top: 2px;
    width: 5px;
    height: 10px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

/* Wheel Section */
.wheel-section {
    display: flex;
    flex-direction: column;
    align-items: center;
}

.wheel-container {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

#wheelCanvas {
    border-radius: 50%;
    box-shadow: var(--shadow-lg), 0 0 0 8px var(--surface), 0 0 0 12px var(--primary-color);
}

.wheel-pointer {
    position: absolute;
    top: -15px;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 0;
    border-left: 15px solid transparent;
    border-right: 15px solid transparent;
    border-top: 30px solid var(--primary-color);
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
    z-index: 10;
}

/* Result Section */
.result-section {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(15, 23, 42, 0.9);
    backdrop-filter: blur(4px);
    justify-content: center;
    align-items: center;
    z-index: 100;
    animation: fadeIn 0.3s ease;
}

.result-section.show {
    display: flex;
}

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

.result-card {
    background: var(--surface);
    padding: 2.5rem;
    border-radius: 1rem;
    text-align: center;
    box-shadow: var(--shadow-lg);
    animation: scaleIn 0.3s ease;
    max-width: 90%;
    width: 400px;
}

@keyframes scaleIn {
    from {
        transform: scale(0.9);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.result-card h2 {
    color: var(--text-secondary);
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.result-card #resultText {
    font-size: 2rem;
    font-weight: 700;
    color: var(--primary-color);
    margin-bottom: 1.5rem;
    word-break: break-word;
}

/* Footer */
footer {
    background: var(--surface);
    padding: 1.5rem;
    text-align: center;
    border-top: 1px solid var(--border-color);
}

footer p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

footer a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s;
}

footer a:hover {
    color: #a78bfa;
    text-decoration: underline;
}

/* Empty State */
.empty-state {
    text-align: center;
    padding: 2rem;
    color: var(--text-secondary);
}

.empty-state svg {
    width: 48px;
    height: 48px;
    margin-bottom: 1rem;
    opacity: 0.5;
}

/* Responsive Design */
@media (max-width: 900px) {
    main {
        grid-template-columns: 1fr;
    }

    .wheel-section {
        order: -1;
    }

    #wheelCanvas {
        width: 300px;
        height: 300px;
    }
}

@media (max-width: 600px) {
    .container {
        padding: 1rem;
    }

    header h1 {
        font-size: 2rem;
    }

    .input-group {
        flex-direction: column;
    }

    .btn-primary {
        width: 100%;
    }

    #wheelCanvas {
        width: 280px;
        height: 280px;
    }

    .result-card {
        padding: 1.5rem;
    }

    .result-card #resultText {
        font-size: 1.5rem;
    }
}

/* Spin Animation */
.spinning {
    animation: none;
}

/* Confetti placeholder - handled by JS */
.confetti-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: 99;
}

.confetti {
    position: absolute;
    width: 10px;
    height: 10px;
    animation: confetti-fall 3s ease-out forwards;
}

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