:root {
    --bg-main: #171717;
    --bg-card: rgba(255, 255, 255, 0.03);
    --border-color: rgba(255, 255, 255, 0.15);
    --primary: #6366f1;
    --primary-dark: #4f46e5;
    --accent: #f59e0b;
    --text-white: #ffffff;
    --radius: 8px;
}

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

body {
    font-family: 'Noto Sans KR', sans-serif;
    background: var(--bg-main);
    color: var(--text-white);
    min-height: 100vh;
    line-height: 1.5;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 25px 15px;
}

header {
    text-align: center;
    margin-bottom: 25px;
    padding: 25px;
    background: var(--bg-card);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
}

header h1 {
    font-size: 1.8rem;
    font-weight: 700;
}

/* 탭 */
.tab-nav {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
    justify-content: center;
}

.tab-btn {
    padding: 10px 25px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    color: var(--text-white);
    font-size: 0.95rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}

.tab-btn:hover {
    background: rgba(255, 255, 255, 0.06);
}

.tab-btn.active {
    background: var(--primary);
    border-color: var(--primary);
}

.sub-tab-nav {
    display: flex;
    gap: 8px;
    margin-bottom: 20px;
}

.sub-tab-btn {
    padding: 8px 20px;
    background: transparent;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    color: var(--text-white);
    font-size: 0.9rem;
    cursor: pointer;
    transition: all 0.2s;
    font-family: inherit;
}

.sub-tab-btn:hover {
    background: rgba(255, 255, 255, 0.05);
}

.sub-tab-btn.active {
    background: rgba(99, 102, 241, 0.3);
    border-color: var(--primary);
}

.tab-content, .sub-tab-content {
    display: none;
}

.tab-content.active, .sub-tab-content.active {
    display: block;
}

/* 확률표 */
.table-container {
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.prob-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.85rem;
}

.prob-table th, .prob-table td {
    padding: 10px 12px;
    text-align: center;
    border: 1px solid var(--border-color);
}

.prob-table th {
    background: rgba(99, 102, 241, 0.25);
    font-weight: 600;
}

.stat-header-row td {
    background: rgba(255, 255, 255, 0.04);
    font-weight: 500;
}

.stat-header-row td.stat-name {
    background: rgba(99, 102, 241, 0.15);
    text-align: left;
    padding-left: 15px;
}

.prob-row td {
    background: rgba(255, 255, 255, 0.02);
    font-size: 0.8rem;
}

.prob-row td:first-child {
    background: rgba(99, 102, 241, 0.08);
}

.max-val {
    color: var(--accent) !important;
    font-weight: 600;
}

/* 계산기 & 시뮬레이터 */
.calculator-container, .simulator-container {
    background: var(--bg-card);
    border-radius: var(--radius);
    padding: 25px;
    border: 1px solid var(--border-color);
}

.calc-section, .sim-section {
    margin-bottom: 22px;
}

.calc-section h3, .sim-section h3 {
    font-size: 0.85rem;
    opacity: 0.8;
    margin-bottom: 10px;
    font-weight: 500;
}

h2 {
    font-size: 1.3rem;
    margin-bottom: 20px;
}

/* 라디오 그룹 */
.radio-group {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.radio-item {
    display: flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    padding: 8px 12px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius);
    border: 1px solid var(--border-color);
    transition: all 0.2s;
}

.radio-item:hover {
    background: rgba(255, 255, 255, 0.05);
}

.radio-item input[type="radio"] {
    display: none;
}

.radio-circle {
    width: 18px;
    height: 18px;
    border: 2px solid var(--border-color);
    border-radius: 50%;
    position: relative;
    transition: all 0.2s;
    flex-shrink: 0;
}

.radio-item input[type="radio"]:checked + .radio-circle {
    border-color: var(--primary);
}

.radio-item input[type="radio"]:checked + .radio-circle::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    width: 10px;
    height: 10px;
    background: var(--primary);
    border-radius: 50%;
}

/* 스텟 그리드 */
.stat-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2px;
    background: var(--border-color);
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--border-color);
}

.stat-btn {
    padding: 12px 8px;
    background: rgba(30, 30, 30, 0.95);
    border: none;
    color: var(--text-white);
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.15s;
    font-family: inherit;
}

.stat-btn:hover {
    background: rgba(99, 102, 241, 0.2);
}

.stat-btn.active {
    background: var(--primary);
}

/* 범위 설정 */
.range-controls {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 15px;
}

.range-control {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.range-control label {
    font-size: 0.8rem;
    opacity: 0.7;
}

.styled-input {
    width: 100%;
    padding: 10px 12px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    color: var(--text-white);
    font-size: 0.95rem;
    font-family: inherit;
    text-align: center;
}

.styled-input:focus {
    outline: none;
    border-color: var(--primary);
}

.styled-slider {
    width: 100%;
    height: 6px;
    -webkit-appearance: none;
    appearance: none;
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
    cursor: pointer;
}

.styled-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
}

.styled-slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
    border: none;
}

/* 즉시 확률 */
.instant-prob {
    margin-top: 15px;
    padding: 12px 15px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius);
    border: 1px solid rgba(99, 102, 241, 0.3);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.instant-label {
    font-size: 0.85rem;
    opacity: 0.8;
}

.instant-value {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--primary);
}

/* 시도 횟수 */
.try-control {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* 버튼 */
.calc-btn, .sim-btn {
    width: 100%;
    padding: 14px 25px;
    background: var(--primary);
    border: none;
    border-radius: var(--radius);
    color: var(--text-white);
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: background 0.2s;
    font-family: inherit;
}

.calc-btn:hover, .sim-btn:hover {
    background: var(--primary-dark);
}

/* 결과 */
.calc-result {
    margin-top: 20px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius);
    border: 1px solid var(--primary);
}

.calc-result h3 {
    font-size: 0.95rem;
    margin-bottom: 15px;
}

.result-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 12px;
}

.result-item {
    text-align: center;
    padding: 15px;
    background: rgba(99, 102, 241, 0.1);
    border-radius: var(--radius);
}

.result-item.highlight {
    background: rgba(245, 158, 11, 0.15);
    border: 1px solid var(--accent);
    grid-column: 1 / -1;
}

.result-label {
    display: block;
    font-size: 0.75rem;
    opacity: 0.7;
    margin-bottom: 5px;
}

.result-value {
    display: block;
    font-size: 1.2rem;
    font-weight: 700;
}

.result-item.highlight .result-value {
    color: var(--accent);
    font-size: 1.5rem;
}

/* 시뮬레이터 */
.sim-results {
    margin-top: 20px;
}

.sim-results h3 {
    font-size: 0.95rem;
    margin-bottom: 15px;
}

.sim-summary {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 2px;
    margin-bottom: 15px;
    background: var(--border-color);
    border-radius: var(--radius);
    overflow: hidden;
}

.sim-summary-item {
    text-align: center;
    padding: 10px 5px;
    background: rgba(30, 30, 30, 0.95);
}

.sim-summary-item .label {
    display: block;
    font-size: 0.7rem;
    opacity: 0.7;
    margin-bottom: 3px;
}

.sim-summary-item .value {
    display: block;
    font-size: 1rem;
    font-weight: 600;
}

.sim-history {
    max-height: 300px;
    overflow-y: auto;
    background: rgba(255, 255, 255, 0.01);
    border-radius: var(--radius);
    padding: 10px;
}

.sim-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 8px 12px;
    margin-bottom: 6px;
    background: rgba(255, 255, 255, 0.02);
    border-radius: var(--radius);
    border-left: 3px solid #9ca3af;
    font-size: 0.9rem;
}

.sim-item:last-child { margin-bottom: 0; }
.sim-item.t3 { border-left-color: #3b82f6; }
.sim-item.t2 { border-left-color: #f59e0b; }
.sim-item.t1 { border-left-color: #ef4444; }

.sim-item-stat {
    display: flex;
    align-items: center;
    gap: 8px;
}

.sim-item-num {
    opacity: 0.5;
    font-size: 0.8rem;
}

.sim-item-value { font-weight: 600; }
.sim-item-prob { font-size: 0.75rem; opacity: 0.6; }

.hidden { display: none !important; }

footer {
    margin-top: 40px;
    text-align: center;
    padding: 15px;
    opacity: 0.5;
    font-size: 0.8rem;
}

::-webkit-scrollbar { width: 5px; }
::-webkit-scrollbar-track { background: rgba(255, 255, 255, 0.02); }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 3px; }

@media (max-width: 600px) {
    .container { padding: 15px 10px; }
    header h1 { font-size: 1.4rem; }
    .tab-btn { padding: 8px 15px; font-size: 0.85rem; }
    .prob-table th, .prob-table td { padding: 8px 6px; font-size: 0.75rem; }
    .range-controls { grid-template-columns: 1fr; }
    .result-grid { grid-template-columns: 1fr; }
    .sim-summary { grid-template-columns: repeat(3, 1fr); }
    .stat-btn { font-size: 0.7rem; padding: 10px 5px; }
}