:root {
    --night:       #192534;
    --night-mid:   #1e3048;
    --parchment:   #f5efe3;
    --parchment-dk:#ede5d5;
    --amber:       #b8710e;
    --amber-bg:    #fef6e8;
    --amber-border:#e8b86a;
    --frost:       #5e9ec0;
    --frost-bg:    #e8f4fa;
    --frost-border:#9ecde4;
    --pine:        #2c5a2e;
    --pine-bg:     #e4f0e4;
    --pine-border: #8cbd8e;
    --snow:        #f0f6fc;
    --wood:        #5c3d1e;
    --ink:         #1e2e40;
    --ink-muted:   #4d6070;
    --border:      #d0c0a8;
    --shadow:      rgba(20, 32, 48, 0.28);
    --body-font:   "Palatino Linotype", "Palatino", "Book Antiqua", Georgia, serif;
    --display-font:"Didot", "Bodoni MT", "Bodoni 72", Georgia, serif;
    --mono-font:   "Courier New", Courier, monospace;
}

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

/* Night sky outside */
body {
    font-family: var(--body-font);
    font-size: 1.05rem;
    background-color: var(--night);
    background-image:
        radial-gradient(ellipse at 30% 20%, rgba(94, 158, 192, 0.12) 0%, transparent 55%),
        radial-gradient(ellipse at 75% 60%, rgba(94, 158, 192, 0.07) 0%, transparent 45%),
        repeating-linear-gradient(
            120deg,
            transparent 0px, transparent 80px,
            rgba(200, 225, 240, 0.015) 80px, rgba(200, 225, 240, 0.015) 81px
        );
    min-height: 100vh;
    color: var(--ink);
}

/* Snowflakes drifting in the margins */
body::before {
    content: "❄  ❄   ❄  ❄    ❄  ❄   ❄  ❄   ❄";
    position: fixed;
    top: 2.5rem;
    left: 0; right: 0;
    text-align: center;
    font-size: 0.85rem;
    color: rgba(200, 225, 245, 0.14);
    letter-spacing: 2.5rem;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
    white-space: nowrap;
}

body::after {
    content: "❄   ❄  ❄    ❄  ❄  ❄   ❄    ❄  ❄";
    position: fixed;
    bottom: 2.5rem;
    left: 0; right: 0;
    text-align: center;
    font-size: 0.75rem;
    color: rgba(200, 225, 245, 0.10);
    letter-spacing: 3rem;
    pointer-events: none;
    z-index: 0;
    overflow: hidden;
    white-space: nowrap;
}

/* The chalet — warm interior */
.chalet {
    max-width: 1020px;
    margin: 2rem auto;
    background: var(--parchment);
    box-shadow: 0 8px 60px var(--shadow), 0 2px 12px rgba(20,32,48,0.4);
    position: relative;
    z-index: 1;
    padding-bottom: 3rem;
}

/* Mountain header — night sky fading to snow */
.header {
    background: linear-gradient(
        180deg,
        #0f1b2a 0%,
        #192534 18%,
        #1e3048 32%,
        #2a4060 44%,
        #3a5870 52%,
        #7a9db5 62%,
        #b8d0e0 72%,
        #deeaf4 80%,
        #f0f4f8 88%,
        var(--parchment) 100%
    );
    padding: 3rem 2rem 2.5rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

/* Mountain silhouette */
.header::before {
    content: "";
    position: absolute;
    bottom: 3.5rem;
    left: 0; right: 0;
    height: 90px;
    background:
        /* left peak */
        polygon(0% 100%, 18% 20%, 28% 55%, 38% 15%, 52% 65%, 65% 30%, 75% 55%, 88% 10%, 100% 60%, 100% 100%);
    clip-path: polygon(0% 100%, 18% 20%, 28% 55%, 38% 15%, 52% 65%, 65% 30%, 75% 55%, 88% 10%, 100% 60%, 100% 100%);
    background-color: #253e55;
    opacity: 0.6;
}

/* Snow cap overlay */
.header::after {
    content: "";
    position: absolute;
    bottom: 5rem;
    left: 0; right: 0;
    height: 45px;
    clip-path: polygon(36% 100%, 38% 15%, 40% 100%, 63% 100%, 65% 30%, 67% 100%, 86% 100%, 88% 10%, 90% 100%);
    background-color: rgba(230, 242, 252, 0.65);
}

.header .badge {
    display: inline-block;
    padding: 0.2rem 0.7rem;
    border: 1px solid rgba(200, 225, 245, 0.5);
    color: rgba(200, 225, 245, 0.85);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    background: rgba(255,255,255,0.08);
    margin-bottom: 1rem;
    font-family: var(--mono-font);
}

.header h1 {
    font-family: var(--display-font);
    font-size: clamp(1.8rem, 4vw, 3rem);
    color: var(--snow);
    letter-spacing: 1px;
    text-shadow: 0 2px 12px rgba(0,0,0,0.5);
    margin-bottom: 0.5rem;
    position: relative;
    z-index: 2;
}

.header .subtitle {
    font-style: italic;
    color: rgba(210, 230, 245, 0.9);
    font-size: 1rem;
    max-width: 620px;
    margin: 0 auto;
    position: relative;
    z-index: 2;
    text-shadow: 0 1px 6px rgba(0,0,0,0.4);
}

/* Nav */
.nav {
    display: flex;
    flex-wrap: wrap;
    gap: 0;
    border-bottom: 2px solid var(--border);
    background: var(--parchment-dk);
}

.nav a {
    text-decoration: none;
    color: var(--ink-muted);
    padding: 0.7rem 1.3rem;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 1px;
    border-right: 1px solid var(--border);
    transition: background 0.15s, color 0.15s;
}

.nav a:hover {
    background: var(--amber-bg);
    color: var(--amber);
}

.nav a.active {
    background: var(--parchment);
    color: var(--amber);
    border-bottom: 3px solid var(--amber);
    margin-bottom: -2px;
}

/* Stats row */
.stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    border-bottom: 1px solid var(--border);
}

.stat {
    padding: 1.2rem 1rem;
    text-align: center;
    border-right: 1px solid var(--border);
}

.stat:last-child { border-right: none; }

.stat .num {
    font-family: var(--display-font);
    font-size: 1.9rem;
    color: var(--wood);
    display: block;
    line-height: 1.1;
}

.stat .label {
    font-size: 0.78rem;
    color: var(--ink-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-top: 0.2rem;
}

/* Body content */
.content {
    padding: 0 2rem;
}

/* Sections */
.section {
    margin: 1.8rem 0;
    padding: 1.5rem;
    border: 1px solid var(--border);
    background: rgba(255,255,255,0.55);
}

.section h2 {
    font-family: var(--display-font);
    font-size: 1.35rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--wood);
    margin-bottom: 0.8rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border);
}

.section h3 {
    font-size: 1.05rem;
    font-style: italic;
    color: var(--amber);
    margin: 1.2rem 0 0.5rem;
}

.section p {
    line-height: 1.75;
    margin-bottom: 0.8rem;
    color: var(--ink);
}

.section ul, .section ol {
    padding-left: 1.4rem;
    line-height: 1.85;
    margin-bottom: 0.8rem;
    color: var(--ink);
}

/* Callout — fireplace warmth */
.callout {
    margin: 1.8rem 2rem;
    border: 1px solid var(--amber-border);
    border-left: 4px solid var(--amber);
    background: var(--amber-bg);
    padding: 1.1rem 1.4rem;
}

.callout p {
    margin: 0;
    line-height: 1.7;
    color: var(--ink);
    font-style: italic;
}

/* Frost callout — cold outside */
.callout-frost {
    border-color: var(--frost-border);
    border-left-color: var(--frost);
    background: var(--frost-bg);
}

/* Cards */
.grid {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    margin-top: 0.75rem;
}

.grid-2 {
    display: grid;
    gap: 1rem;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    margin-top: 0.75rem;
}

.card {
    border: 1px solid var(--border);
    padding: 1rem 1.1rem;
    background: var(--parchment-dk);
}

.card h3 {
    font-size: 0.95rem;
    font-style: normal;
    color: var(--wood);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin: 0 0 0.4rem;
}

.card p {
    font-size: 0.9rem;
    color: var(--ink-muted);
    line-height: 1.6;
    margin: 0;
}

/* Numbered result blocks */
.result {
    border: 1px solid var(--border);
    margin-bottom: 1.2rem;
    background: rgba(255,255,255,0.6);
    display: flex;
    gap: 0;
}

.result-num {
    background: var(--wood);
    color: var(--snow);
    font-family: var(--display-font);
    font-size: 1.6rem;
    padding: 1.1rem 1.2rem;
    display: flex;
    align-items: flex-start;
    justify-content: center;
    min-width: 3.2rem;
    line-height: 1;
    padding-top: 1.25rem;
}

.result-body {
    padding: 1rem 1.2rem;
    flex: 1;
}

.result-body h3 {
    font-size: 1rem;
    color: var(--wood);
    margin: 0 0 0.4rem;
    font-style: normal;
}

.result-body p {
    font-size: 0.92rem;
    color: var(--ink);
    line-height: 1.65;
    margin-bottom: 0.4rem;
}

/* Tags */
.tag {
    display: inline-block;
    padding: 0.12rem 0.5rem;
    font-size: 0.78rem;
    border-radius: 2px;
    font-family: var(--body-font);
}

.tag-yes {
    background: var(--pine-bg);
    color: var(--pine);
    border: 1px solid var(--pine-border);
}

.tag-no {
    background: #fde8e8;
    color: #7a1c1c;
    border: 1px solid #f5c0c0;
}

.tag-partial {
    background: var(--amber-bg);
    color: var(--amber);
    border: 1px solid var(--amber-border);
}

/* Tables */
.table-wrap { overflow-x: auto; margin: 0.5rem 0; }

.table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.table th, .table td {
    border: 1px solid var(--border);
    padding: 0.55rem 0.75rem;
    text-align: left;
}

.table th {
    background: var(--parchment-dk);
    text-transform: uppercase;
    font-size: 0.78rem;
    letter-spacing: 0.8px;
    color: var(--wood);
}

.reading-note {
    font-size: 0.85rem;
    color: var(--ink-muted);
    font-style: italic;
    margin-top: 0.5rem;
    padding-top: 0.5rem;
    border-top: 1px solid var(--border);
}

/* Config tiers */
.tier {
    border-left: 3px solid var(--frost);
    padding: 0.75rem 1rem;
    background: var(--frost-bg);
    margin-bottom: 0.75rem;
}

.tier.tier-2 { border-left-color: var(--amber); background: var(--amber-bg); }
.tier.tier-3 { border-left-color: var(--pine); background: var(--pine-bg); }

.tier h3 {
    font-size: 0.9rem;
    font-style: normal;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--ink);
    margin: 0 0 0.3rem;
}

.tier p {
    font-size: 0.88rem;
    color: var(--ink-muted);
    margin: 0;
    line-height: 1.55;
}

/* Nav cards */
.nav-card {
    display: block;
    text-decoration: none;
    border: 1px solid var(--border);
    background: var(--parchment-dk);
    padding: 1.2rem 1.4rem;
    transition: background 0.15s, border-color 0.15s;
}

.nav-card:hover {
    background: var(--amber-bg);
    border-color: var(--amber-border);
}

.nav-card h3 {
    font-family: var(--display-font);
    font-size: 1.1rem;
    color: var(--wood);
    margin-bottom: 0.35rem;
}

.nav-card p {
    font-size: 0.88rem;
    color: var(--ink-muted);
    line-height: 1.6;
    margin: 0;
}

.nav-card .arrow {
    float: right;
    color: var(--amber);
    font-size: 1.2rem;
}

/* Back link */
.back-link {
    display: inline-block;
    margin-top: 0.5rem;
    color: var(--amber);
    text-decoration: none;
    border-bottom: 1px solid var(--amber-border);
    font-size: 0.88rem;
}

/* Footer */
.footer {
    margin: 2rem 2rem 0;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
    text-align: center;
    font-size: 0.85rem;
    color: var(--ink-muted);
}

.footer a { color: var(--amber); text-decoration: none; }

/* Code block */
.code {
    font-family: var(--mono-font);
    background: #f0ece4;
    padding: 0.75rem 1rem;
    border: 1px dashed var(--border);
    font-size: 0.88rem;
    white-space: pre-wrap;
    color: var(--ink);
    margin: 0.5rem 0;
}

@media (max-width: 700px) {
    .chalet { margin: 0; }
    .header { padding: 2.5rem 1rem 2rem; }
    .content { padding: 0 1rem; }
    .callout { margin: 1.2rem 1rem; }
    .result { flex-direction: column; }
    .result-num { min-width: unset; padding: 0.5rem 1rem; font-size: 1.1rem; }
    .nav a { padding: 0.6rem 0.8rem; font-size: 0.78rem; }
}