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

:root {
    --bg: #1C1C1E;
    --card-bg: #F5F2EE;
    --card-text: #1C1C1E;
    --muted: #5c4a2e;
    --muted-on-dark: #c8aa88;
    --radius: 16px;
    --font: "Inter", "Helvetica Neue", Arial, sans-serif;
}

html, body {
    height: 100%;
    background-color: var(--bg);
    color: var(--card-bg);
    font-family: var(--font);
    font-size: 18px;
    -webkit-font-smoothing: antialiased;
}

#app {
    height: 100%;
}

button {
    font-family: var(--font);
    cursor: pointer;
    border: none;
    outline: none;
}

.app {
    height: 100%;
    display: flex;
    flex-direction: column;
}

.layout {
    flex: 1;
    display: flex;
    flex-direction: row;
    align-items: flex-start;
    gap: 40px;
    max-width: 760px;
    margin: 0 auto;
    padding: 48px 24px 32px;
    width: 100%;
}

.home {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 32px;
    min-width: 0;
}

/* Header */

.home-header {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.app-title {
    font-size: 2.4rem;
    font-weight: 300;
    letter-spacing: -0.02em;
    color: var(--card-bg);
}

.app-subtitle {
    font-size: 1rem;
    color: var(--muted-on-dark);
    font-weight: 400;
}

/* Controls card */

.controls-card {
    background-color: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: 0 8px 32px #00000059;
    padding: 4px 0;
    display: flex;
    flex-direction: column;
}

.divider {
    height: 1px;
    background: rgba(0, 0, 0, 0.08);
    margin: 0 20px;
}

.control-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 16px 20px;
}

.control-block {
    display: flex;
    flex-direction: column;
    gap: 10px;
    padding: 16px 20px;
}

.control-block .control-row {
    padding: 0;
}

.control-label {
    font-size: 0.95rem;
    color: var(--card-text);
    font-weight: 400;
}

/* NPC modifier stepper */

.stepper {
    display: flex;
    align-items: center;
    gap: 8px;
}

.step-btn {
    background: rgba(0, 0, 0, 0.07);
    color: var(--card-text);
    border-radius: 8px;
    width: 36px;
    height: 36px;
    font-size: 1.3rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.12s;
    line-height: 1;
    padding: 0;
}

.step-btn:hover:not(:disabled) {
    background: rgba(0, 0, 0, 0.13);
}

.step-btn:disabled {
    opacity: 0.25;
    cursor: not-allowed;
}

.stepper-value {
    font-size: 1.2rem;
    font-weight: 500;
    color: var(--card-text);
    min-width: 3rem;
    text-align: center;
}

/* Advantage toggle */

.toggle-btn {
    background: rgba(0, 0, 0, 0.07);
    color: var(--muted);
    border-radius: 8px;
    padding: 8px 20px;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all 0.15s;
    min-width: 56px;
    text-align: center;
}

.toggle-btn--active {
    background: #1C1C1E;
    color: #F5F2EE;
}

/* Level slider */

.level-badge {
    font-size: 0.9rem;
    color: var(--muted);
    font-weight: 500;
    white-space: nowrap;
}

.slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 4px;
    background: rgba(0, 0, 0, 0.12);
    border-radius: 2px;
    outline: none;
    cursor: pointer;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--card-text);
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
}

.slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--card-text);
    cursor: pointer;
    border: none;
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.25);
    box-sizing: border-box;
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.82rem;
    color: var(--muted);
    padding: 0 2px;
}

/* Results */

.results {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.results-label {
    font-size: 0.9rem;
    text-transform: lowercase;
    letter-spacing: 0.05em;
    color: var(--muted-on-dark);
    font-weight: 500;
}

.result-card {
    background-color: var(--card-bg);
    border-radius: 12px;
    box-shadow: 0 8px 32px #00000059;
    padding: 16px 20px 14px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.result-card-top {
    display: flex;
    align-items: baseline;
    justify-content: space-between;
    gap: 8px;
}

.result-card-labels {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.result-name {
    font-size: 1rem;
    font-weight: 500;
    color: var(--card-text);
}

.result-mod {
    font-size: 0.88rem;
    color: var(--muted);
    font-weight: 500;
}

.result-pct {
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--card-text);
    letter-spacing: -0.02em;
    flex-shrink: 0;
}

.band--danger { color: #b91c1c; }
.band--warning { color: #b45309; }
.band--ok { color: #2d7a55; }
.band--good { color: #b8860b; }

.result-bar-wrap {
    background: rgba(0, 0, 0, 0.08);
    border-radius: 3px;
    height: 5px;
    overflow: hidden;
}

.result-bar {
    height: 100%;
    background: var(--card-text);
    border-radius: 3px;
    transition: width 0.3s ease;
}

.result-bar.band--danger { background: #b91c1c; }
.result-bar.band--warning { background: #b45309; }
.result-bar.band--ok { background: #2d7a55; }
.result-bar.band--good { background: #b8860b; }

.sidebar {
    width: 200px;
    flex-shrink: 0;
    padding-top: 12px;
}

.sidebar-heading {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--muted-on-dark);
    margin-bottom: 10px;
}

.sidebar-body {
    font-size: 0.85rem;
    line-height: 1.6;
    color: var(--muted-on-dark);
    font-weight: 400;
}

.sidebar-link {
    display: inline-block;
    margin-top: 16px;
    font-size: 0.82rem;
    color: var(--muted-on-dark);
    text-decoration: underline;
    text-underline-offset: 3px;
}

.sidebar-link:hover {
    color: var(--card-bg);
}

@media (max-width: 640px) {
    .layout {
        flex-direction: column;
        padding-top: 40px;
    }

    .sidebar {
        width: 100%;
        padding-top: 0;
        border-top: 1px solid rgba(255, 255, 255, 0.08);
        padding-top: 24px;
    }
}

@media (min-width: 480px) {
    .layout {
        padding-top: 64px;
    }
}