:root {
    --bg-color: oklch(0.1 0.05 250);
    --card-bg: oklch(0.15 0.05 250 / 0.8);
    --primary-color: oklch(0.7 0.25 200);
    --accent-color: oklch(0.6 0.3 330);
    --text-color: oklch(0.95 0.02 250);
    --error-color: oklch(0.6 0.25 20);
    --shadow-deep: 0 20px 50px -10px oklch(0.05 0.05 250 / 0.5);
    --glass-border: 1px solid oklch(1 0 0 / 0.1);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
    font-family: 'Pretendard', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

body {
    background: var(--bg-color);
    background-image: 
        radial-gradient(at 0% 0%, oklch(0.2 0.1 260) 0%, transparent 50%),
        radial-gradient(at 100% 100%, oklch(0.2 0.1 340) 0%, transparent 50%);
    color: var(--text-color);
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
    padding: 2rem;
}

.app-container {
    max-width: 1000px;
    width: 100%;
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

header {
    text-align: center;
    animation: fadeIn 1s ease-out;
}

header h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
    background: linear-gradient(to right, var(--primary-color), var(--accent-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    filter: drop-shadow(0 2px 10px oklch(0.7 0.2 200 / 0.3));
}

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

@container (max-width: 800px) {
    main {
        grid-template-columns: 1fr;
    }
}

/* 룰렛 섹션 */
.roulette-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 2rem;
    position: relative;
}

.wheel-wrapper {
    position: relative;
    width: 420px;
    height: 420px;
    padding: 10px;
    background: var(--card-bg);
    border-radius: 50%;
    border: var(--glass-border);
    box-shadow: var(--shadow-deep);
    display: flex;
    justify-content: center;
    align-items: center;
}

.pointer {
    position: absolute;
    top: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 30px;
    height: 40px;
    background: var(--accent-color);
    clip-path: polygon(50% 100%, 0% 0%, 100% 0%);
    z-index: 10;
    filter: drop-shadow(0 4px 10px oklch(0.6 0.3 330 / 0.5));
}

#roulette-canvas {
    border-radius: 50%;
    transition: transform 5s cubic-bezier(0.1, 0, 0.1, 1);
}

#spin-btn {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 80px;
    height: 80px;
    border-radius: 50%;
    border: none;
    background: var(--text-color);
    color: var(--bg-color);
    font-weight: bold;
    font-size: 1.1rem;
    cursor: pointer;
    box-shadow: 0 0 20px oklch(1 0 0 / 0.2);
    transition: all 0.3s ease;
    z-index: 5;
}

#spin-btn:hover {
    transform: translate(-50%, -50%) scale(1.1);
    box-shadow: 0 0 30px oklch(1 0 0 / 0.4);
}

#spin-btn:active {
    transform: translate(-50%, -50%) scale(0.95);
}

/* 결과 표시 */
#result-display {
    padding: 1.5rem 3rem;
    background: var(--accent-color);
    color: white;
    border-radius: 50px;
    font-size: 1.5rem;
    font-weight: bold;
    box-shadow: 0 10px 30px oklch(0.6 0.3 330 / 0.4);
    animation: bounceIn 0.5s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.hidden {
    display: none;
}

/* 입력 섹션 */
.input-card {
    background: var(--card-bg);
    backdrop-filter: blur(20px);
    border-radius: 24px;
    padding: 2rem;
    border: var(--glass-border);
    box-shadow: var(--shadow-deep);
}

.input-card h2 {
    margin-bottom: 1.5rem;
    font-size: 1.5rem;
}

.input-group {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

#item-input {
    flex: 1;
    padding: 0.8rem 1.2rem;
    border-radius: 12px;
    border: 1px solid oklch(1 0 0 / 0.1);
    background: oklch(1 0 0 / 0.05);
    color: white;
    font-size: 1rem;
    outline: none;
    transition: border-color 0.3s;
}

#item-input:focus {
    border-color: var(--primary-color);
}

#add-btn {
    padding: 0.8rem 1.5rem;
    border-radius: 12px;
    border: none;
    background: var(--primary-color);
    color: white;
    font-weight: bold;
    cursor: pointer;
    transition: opacity 0.3s;
}

#add-btn:hover {
    opacity: 0.9;
}

#item-list {
    list-style: none;
    max-height: 300px;
    overflow-y: auto;
    padding-right: 0.5rem;
}

#item-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.8rem 1rem;
    background: oklch(1 0 0 / 0.03);
    border-radius: 10px;
    margin-bottom: 0.5rem;
    animation: slideIn 0.3s ease-out;
}

.delete-btn {
    background: none;
    border: none;
    color: var(--error-color);
    cursor: pointer;
    font-weight: bold;
    font-size: 1.2rem;
}

/* 애니메이션 */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-20px); }
    to { opacity: 1; transform: translateY(0); }
}

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

@keyframes bounceIn {
    0% { transform: scale(0.3); opacity: 0; }
    50% { transform: scale(1.05); opacity: 1; }
    70% { transform: scale(0.9); }
    100% { transform: scale(1); }
}

/* 스크롤바 커스텀 */
#item-list::-webkit-scrollbar {
    width: 6px;
}

#item-list::-webkit-scrollbar-thumb {
    background: oklch(1 0 0 / 0.1);
    border-radius: 10px;
}