/* ═══════════════════════════════════════════════════════════════════
   CAIRN — dark cartographic theme
   ═══════════════════════════════════════════════════════════════════ */

:root {
    --bg: #141414;
    --bg-2: #0f0f0f;
    --surface: #1e1e1e;
    --surface-2: #252525;
    --surface-hi: #2a2a2a;
    --border: #2a2a2a;
    --border-hi: #3a3a3a;
    --text: #ece7de;
    --text-mid: #b4ac9d;
    --text-muted: #7c7568;
    --accent: #D4854A;
    --accent-hi: #e49a63;
    --accent-dim: rgba(212, 133, 74, 0.12);
    --accent-glow: rgba(212, 133, 74, 0.25);
    --glacier: #5BA4C9;
    --glacier-dim: rgba(91, 164, 201, 0.15);
    --success: #7db37b;
    --error: #d06767;
    --font-serif: "DM Serif Display", "Cormorant Garamond", Georgia, serif;
    --font-mono: "DM Mono", "JetBrains Mono", "IBM Plex Mono", ui-monospace, monospace;
    --shadow: 0 1px 0 rgba(255, 255, 255, 0.02) inset;
    --radius: 8px;
    --radius-sm: 4px;
}

* {
    box-sizing: border-box;
}

html, body {
    margin: 0;
    padding: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-mono);
    font-size: 14px;
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scroll-behavior: smooth;
    overflow-x: hidden;
}

/* Topographic contour background — layered SVG patterns at very low opacity */
.page-bg {
    position: fixed;
    inset: 0;
    z-index: -1;
    background-color: var(--bg);
    background-image: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' width='600' height='600' viewBox='0 0 600 600'><defs><radialGradient id='a' cx='50%' cy='50%'><stop offset='0' stop-color='%23fff' stop-opacity='0'/><stop offset='1' stop-color='%23fff' stop-opacity='.035'/></radialGradient></defs><g fill='none' stroke='%23ffffff' stroke-width='.6' opacity='.055'><path d='M0 220 Q100 180 200 200 T400 190 T600 170'/><path d='M0 260 Q100 240 200 240 T400 240 T600 230'/><path d='M0 300 Q120 280 240 285 T480 290 T600 280'/><path d='M0 340 Q110 320 220 330 T440 330 T600 320'/><path d='M0 380 Q120 360 240 365 T480 370 T600 360'/><path d='M0 420 Q130 400 260 410 T520 410 T600 400'/><path d='M0 460 Q140 440 280 450 T560 450 T600 440'/><path d='M60 100 Q140 80 240 95 T440 100 T600 80'/><path d='M40 140 Q150 115 260 130 T460 140 T600 120'/></g><g fill='none' stroke='%23D4854A' stroke-width='.6' opacity='.04'><path d='M150 260 Q250 240 350 270 T550 280'/><path d='M180 300 Q280 285 380 310 T580 320'/><path d='M200 340 Q300 325 400 350 T600 360'/></g></svg>");
    background-size: 800px 800px;
    background-repeat: repeat;
    background-position: center;
}

.page-bg::after {
    content: "";
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 80% 50% at 50% 0%, rgba(212, 133, 74, 0.05), transparent 70%),
        radial-gradient(ellipse 60% 40% at 80% 100%, rgba(91, 164, 201, 0.04), transparent 70%);
    pointer-events: none;
}

/* ═══════════════════════════════════════════════════════════════════
   SECTIONS
   ═══════════════════════════════════════════════════════════════════ */

.section {
    width: 100%;
    padding: 5rem 1.5rem;
}

.section.hidden {
    display: none;
}

.section--reveal {
    animation: revealUp 0.55s ease both;
}

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

.section-inner {
    max-width: 1100px;
    margin: 0 auto;
    width: 100%;
}

.section-inner--narrow {
    max-width: 720px;
}

.section-inner--wide {
    max-width: 1400px;
}

.section-header {
    margin-bottom: 2.5rem;
    text-align: left;
    position: relative;
}

.back-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    background: transparent;
    border: 1px solid var(--border-hi);
    border-radius: var(--radius-sm);
    color: var(--text-mid);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    padding: 0.45rem 0.9rem;
    cursor: pointer;
    margin-bottom: 1.25rem;
    transition: all 0.15s ease;
}

.back-btn:hover {
    color: var(--accent);
    border-color: var(--accent);
    transform: translateX(-2px);
}

.section-step {
    display: inline-block;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--accent);
    letter-spacing: 0.2em;
    margin-bottom: 0.75rem;
}

.section-title {
    font-family: var(--font-serif);
    font-size: clamp(2rem, 4vw, 2.75rem);
    font-weight: 400;
    color: var(--text);
    margin: 0 0 0.5rem 0;
    letter-spacing: -0.01em;
    line-height: 1.1;
}

.section-sub {
    font-family: var(--font-mono);
    font-size: 0.78rem;
    color: var(--text-muted);
    margin: 0;
    letter-spacing: 0.02em;
}

.section-action {
    margin-top: 2rem;
    display: flex;
    justify-content: center;
}

/* ═══════════════════════════════════════════════════════════════════
   SECTION 1 · HERO
   ═══════════════════════════════════════════════════════════════════ */

.section--hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 3rem 1.5rem;
}

.hero-inner {
    width: 100%;
    max-width: 680px;
    text-align: center;
}

.hero-eyebrow {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--accent);
    letter-spacing: 0.35em;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.brand {
    font-family: var(--font-serif);
    font-weight: 400;
    font-size: clamp(4rem, 10vw, 6.5rem);
    margin: 0 0 1.5rem 0;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.4em;
    line-height: 1;
    letter-spacing: -0.01em;
}

.brand-mark {
    color: var(--accent);
    font-size: 0.7em;
}

.brand-name {
    color: var(--text);
    font-style: italic;
}

.tagline {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--text-mid);
    margin: 0 0 3rem 0;
    line-height: 1.6;
    font-weight: 300;
}

/* Drop zone */
.drop-zone {
    border: 1px dashed var(--accent);
    border-radius: var(--radius);
    padding: 3rem 2rem;
    background: rgba(30, 30, 30, 0.4);
    backdrop-filter: blur(6px);
    cursor: pointer;
    transition: all 0.25s ease;
    position: relative;
    min-height: 220px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.drop-zone:hover {
    border-color: var(--accent-hi);
    background: rgba(30, 30, 30, 0.7);
}

.drop-zone.dragover {
    border-style: solid;
    border-color: var(--accent);
    background: var(--accent-dim);
    box-shadow: 0 0 0 1px var(--accent), 0 0 40px var(--accent-glow);
    transform: scale(1.005);
}

.drop-content {
    width: 100%;
    text-align: center;
}

.drop-zone.has-files .drop-content {
    display: none;
}

.drop-icon {
    font-size: 2.2rem;
    color: var(--accent);
    margin-bottom: 1rem;
    opacity: 0.85;
}

.drop-main {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--text);
    margin: 0 0 0.5rem 0;
    font-weight: 400;
}

.drop-hint {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-muted);
    margin: 0 0 1.5rem 0;
    letter-spacing: 0.18em;
}

.drop-buttons {
    display: flex;
    gap: 0.5rem;
    justify-content: center;
    flex-wrap: wrap;
}

/* File summary after selection */
.file-summary {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    width: 100%;
}

.file-summary-icon {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background: var(--accent);
    color: #141414;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 1rem;
}

.file-summary-text {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--text);
}

#file-count-num {
    color: var(--accent);
    font-weight: 500;
    margin-right: 0.25rem;
}

.clear-btn {
    background: transparent;
    border: none;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    cursor: pointer;
    padding: 0.25rem 0.75rem;
    margin-left: 0.75rem;
    text-decoration: underline;
    text-underline-offset: 3px;
    transition: color 0.15s;
}

.clear-btn:hover {
    color: var(--error);
}

/* Continue button area (fades in after files) */
.continue-area {
    margin-top: 2rem;
    opacity: 0;
    transform: translateY(10px);
    transition: opacity 0.4s ease, transform 0.4s ease;
}

.continue-area.visible {
    opacity: 1;
    transform: translateY(0);
}

.hero-footer {
    margin-top: 3rem;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    letter-spacing: 0.02em;
}

.footer-dot {
    color: var(--success);
    font-size: 0.6rem;
    margin-right: 0.25rem;
}

/* ═══════════════════════════════════════════════════════════════════
   BUTTONS
   ═══════════════════════════════════════════════════════════════════ */

.primary-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.9rem 1.75rem;
    background: var(--accent);
    border: 1px solid var(--accent);
    border-radius: var(--radius-sm);
    color: #141414;
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.18s ease;
    box-shadow: 0 0 0 0 var(--accent-glow);
}

.primary-btn:hover {
    background: var(--accent-hi);
    border-color: var(--accent-hi);
    box-shadow: 0 0 20px var(--accent-glow);
    transform: translateY(-1px);
}

.primary-btn:active {
    transform: translateY(0);
}

.primary-btn--large {
    padding: 1.1rem 2.5rem;
    font-size: 0.85rem;
}

.primary-btn .arrow {
    font-size: 1.1em;
    line-height: 1;
}

.ghost-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    padding: 0.55rem 1.1rem;
    background: transparent;
    border: 1px solid var(--border-hi);
    border-radius: var(--radius-sm);
    color: var(--text-mid);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.18s ease;
}

.ghost-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

/* ═══════════════════════════════════════════════════════════════════
   SECTION 2 · CONFIGURE
   ═══════════════════════════════════════════════════════════════════ */

.configure-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 1.5rem;
    align-items: start;
}

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow);
}

.card-header {
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border);
    background: var(--surface-2);
}

.card-header--subsection {
    border-top: 1px solid var(--border);
}

.card-eyebrow {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    color: var(--text-mid);
    letter-spacing: 0.25em;
    font-weight: 500;
}

.card-body {
    padding: 1.25rem;
}

.settings-body {
    padding: 1rem 1.25rem 1.5rem;
}

/* Settings rows */
.setting-row {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 1rem;
    padding: 0.6rem 0;
}

.setting-row label {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-mid);
    letter-spacing: 0.08em;
}

.setting-row--toggle {
    display: block;
    padding: 0.55rem 0;
}

/* Inputs */
.text-input,
.select-input {
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text);
    font-family: var(--font-mono);
    font-size: 0.82rem;
    padding: 0.5rem 0.7rem;
    width: 220px;
    outline: none;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.text-input:focus,
.select-input:focus,
.input-unit:focus-within {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-dim);
}

.select-input {
    cursor: pointer;
    width: 220px;
}

.input-unit {
    display: flex;
    align-items: stretch;
    background: var(--surface-2);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    width: 140px;
    transition: border-color 0.15s, box-shadow 0.15s;
}

.input-unit input {
    flex: 1;
    min-width: 0;
    background: transparent;
    border: none;
    color: var(--text);
    font-family: var(--font-mono);
    font-size: 0.82rem;
    padding: 0.5rem 0.65rem;
    outline: none;
    -moz-appearance: textfield;
    text-align: right;
}

.input-unit input::-webkit-outer-spin-button,
.input-unit input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.input-unit .unit {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    padding: 0 0.75rem;
    background: var(--bg-2);
    display: flex;
    align-items: center;
    letter-spacing: 0.05em;
}

/* Section divider inside cards */
.section-divider {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin: 1rem 0 0.25rem 0;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

.section-divider span {
    font-family: var(--font-mono);
    font-size: 0.62rem;
    color: var(--text-muted);
    letter-spacing: 0.3em;
}

.section-divider::after {
    content: "";
    flex: 1;
    height: 1px;
    background: var(--border);
}

/* Toggle (checkbox) */
.toggle {
    display: flex;
    align-items: flex-start;
    gap: 0.75rem;
    cursor: pointer;
    padding: 0.4rem 0;
}

.toggle input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.toggle-box {
    width: 36px;
    height: 20px;
    background: var(--surface-2);
    border: 1px solid var(--border-hi);
    border-radius: 999px;
    position: relative;
    flex-shrink: 0;
    margin-top: 2px;
    transition: all 0.18s ease;
}

.toggle-box::after {
    content: "";
    position: absolute;
    top: 2px;
    left: 2px;
    width: 14px;
    height: 14px;
    background: var(--text-muted);
    border-radius: 50%;
    transition: all 0.18s ease;
}

.toggle input:checked + .toggle-box {
    background: var(--accent-dim);
    border-color: var(--accent);
}

.toggle input:checked + .toggle-box::after {
    left: 18px;
    background: var(--accent);
}

.toggle-label {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--text);
    line-height: 1.4;
}

.toggle-sub {
    display: block;
    font-size: 0.66rem;
    color: var(--text-muted);
    margin-top: 0.15rem;
    letter-spacing: 0.02em;
}

/* Frame nested options */
.frame-options {
    margin-top: 0.25rem;
    margin-left: 52px;
    padding: 0.25rem 0.85rem;
    border-left: 1px solid var(--border-hi);
    max-height: 400px;
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.2s ease;
    opacity: 1;
}

.frame-options.collapsed {
    max-height: 0;
    opacity: 0;
    padding: 0;
    margin-top: 0;
}

/* Preview card right column */
.feature-list {
    list-style: none;
    margin: 0 0 1.5rem 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.85rem;
}

.feature-list li {
    display: flex;
    align-items: flex-start;
    gap: 0.85rem;
    transition: opacity 0.2s;
}

.feature-list li.disabled {
    opacity: 0.35;
}

.feature-bullet {
    font-size: 0.85rem;
    margin-top: 0.15rem;
    line-height: 1;
    flex-shrink: 0;
}

.feature-title {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text);
    font-weight: 500;
}

.feature-sub {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--text-muted);
    margin-top: 0.1rem;
    letter-spacing: 0.02em;
}

.preview-stats {
    border-top: 1px solid var(--border);
    padding-top: 1rem;
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.preview-stat {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
}

.preview-stat-label {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--text-muted);
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.preview-stat-value {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text);
}

.preview-note {
    margin-top: 1.25rem;
    padding-top: 1.25rem;
    border-top: 1px dashed var(--border);
    font-family: var(--font-mono);
    font-size: 0.68rem;
    color: var(--text-muted);
    font-style: italic;
    line-height: 1.5;
}

/* ═══════════════════════════════════════════════════════════════════
   SECTION 3 · PROCESSING TIMELINE
   ═══════════════════════════════════════════════════════════════════ */

.pipeline-steps {
    list-style: none;
    margin: 0;
    padding: 0;
    position: relative;
}

.pipeline-steps::before {
    content: "";
    position: absolute;
    left: 11px;
    top: 12px;
    bottom: 12px;
    width: 1px;
    background: var(--border);
}

.pipeline-step {
    position: relative;
    padding: 0.85rem 0 0.85rem 2.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.15rem;
    transition: all 0.3s ease;
}

.pipeline-step::before {
    content: "";
    position: absolute;
    left: 4px;
    top: 1.1rem;
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background: var(--bg);
    border: 2px solid var(--border-hi);
    transition: all 0.25s ease;
    z-index: 1;
}

.pipeline-step .step-label {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-muted);
    transition: color 0.25s;
}

.pipeline-step .step-detail {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    letter-spacing: 0.02em;
    min-height: 1em;
}

.pipeline-step.running::before {
    background: var(--accent);
    border-color: var(--accent);
    animation: pulse 1.4s ease-in-out infinite;
    box-shadow: 0 0 0 3px var(--accent-dim);
}

.pipeline-step.running .step-label {
    color: var(--accent);
    font-weight: 500;
}

.pipeline-step.done::before {
    background: var(--success);
    border-color: var(--success);
}

.pipeline-step.done .step-label {
    color: var(--text);
}

.pipeline-step.error::before {
    background: var(--error);
    border-color: var(--error);
}

.pipeline-step.error::after {
    content: "✕";
    position: absolute;
    left: 7px;
    top: 1.1rem;
    color: #141414;
    font-size: 0.7rem;
    font-weight: 700;
    z-index: 2;
}

.pipeline-step.error .step-label {
    color: var(--error);
}

.pipeline-step.error .step-detail {
    color: var(--error);
}

@keyframes pulse {
    0%, 100% { box-shadow: 0 0 0 3px var(--accent-dim); }
    50% { box-shadow: 0 0 0 7px rgba(212, 133, 74, 0.08); }
}

.processing-error {
    margin-top: 2rem;
    padding: 1rem 1.25rem;
    background: rgba(208, 103, 103, 0.08);
    border: 1px solid var(--error);
    border-radius: var(--radius-sm);
    color: var(--error);
    font-size: 0.8rem;
}

/* ═══════════════════════════════════════════════════════════════════
   SECTION 4 · 3D VIEWER
   ═══════════════════════════════════════════════════════════════════ */

.viewer-wrap {
    position: relative;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    background: #0a0a0a;
    box-shadow: 0 8px 40px rgba(0, 0, 0, 0.4), inset 0 0 60px rgba(0, 0, 0, 0.4);
}

.viewer-container {
    width: 100%;
    height: 65vh;
    min-height: 500px;
    position: relative;
}

.viewer-container canvas {
    display: block;
    width: 100% !important;
    height: 100% !important;
}

.viewer-loading {
    position: absolute;
    inset: 0;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.25rem;
    background: #0a0a0a;
    transition: opacity 0.4s ease;
    z-index: 10;
}

.viewer-loading.hidden {
    opacity: 0;
    pointer-events: none;
}

.spinner {
    width: 48px;
    height: 48px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to { transform: rotate(360deg); }
}

.viewer-loading-text {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    letter-spacing: 0.3em;
}

.viewer-toolbar {
    position: absolute;
    top: 1rem;
    right: 1rem;
    display: flex;
    gap: 0.4rem;
    z-index: 5;
    background: rgba(20, 20, 20, 0.85);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 0.25rem;
}

.tool-btn {
    background: transparent;
    border: none;
    color: var(--text-mid);
    font-family: var(--font-mono);
    font-size: 0.7rem;
    letter-spacing: 0.08em;
    padding: 0.45rem 0.75rem;
    cursor: pointer;
    border-radius: 3px;
    transition: all 0.15s;
}

.tool-btn:hover {
    background: var(--accent-dim);
    color: var(--accent);
}

.tool-btn.active {
    background: var(--accent-dim);
    color: var(--accent);
}

.viewer-hint {
    position: absolute;
    bottom: 1rem;
    left: 1rem;
    font-family: var(--font-mono);
    font-size: 0.6rem;
    color: var(--text-muted);
    letter-spacing: 0.25em;
    pointer-events: none;
    opacity: 0.8;
    z-index: 5;
}

/* ═══════════════════════════════════════════════════════════════════
   SECTION 5 · DOWNLOAD
   ═══════════════════════════════════════════════════════════════════ */

.download-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
}

.download-col {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.download-button {
    display: flex;
    align-items: center;
    gap: 1.25rem;
    padding: 1.5rem 1.75rem;
    background: var(--accent);
    border: 1px solid var(--accent);
    border-radius: var(--radius);
    color: #141414;
    font-family: var(--font-mono);
    text-decoration: none;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 4px 24px rgba(212, 133, 74, 0.15);
}

.download-button:hover {
    background: var(--accent-hi);
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(212, 133, 74, 0.3);
}

.download-button--secondary {
    background: transparent;
    border: 1px solid var(--border-hi);
    color: var(--text);
    box-shadow: none;
    padding: 1.1rem 1.5rem;
}

.download-button--secondary:hover {
    background: var(--surface-2);
    border-color: var(--accent);
    color: var(--text);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
}

.download-button--secondary .download-title {
    color: var(--text);
}

.download-button--secondary .download-sub {
    color: var(--text-mid);
}

.download-icon {
    font-size: 1.75rem;
    line-height: 1;
}

.download-text {
    flex: 1;
}

.download-title {
    font-size: 1.05rem;
    font-weight: 500;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.download-badge {
    display: inline-block;
    background: rgba(20, 20, 20, 0.18);
    color: #141414;
    padding: 0.1rem 0.5rem;
    border-radius: 3px;
    font-size: 0.6rem;
    letter-spacing: 0.12em;
    font-weight: 500;
}

.download-sub {
    font-size: 0.75rem;
    opacity: 0.7;
    margin-top: 0.2rem;
    letter-spacing: 0.05em;
}

.download-hint {
    margin-top: 0.25rem;
    padding: 0.85rem 1rem;
    background: var(--surface);
    border: 1px dashed var(--border);
    border-radius: var(--radius-sm);
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-mid);
    line-height: 1.55;
    letter-spacing: 0.01em;
}

.download-hint strong {
    color: var(--accent);
    font-weight: 500;
}

/* Stat rows */
.stat-rows {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.stat-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    padding-bottom: 0.5rem;
    border-bottom: 1px dotted var(--border);
}

.stat-row:last-child {
    border-bottom: none;
    padding-bottom: 0;
}

.stat-label {
    font-size: 0.7rem;
    color: var(--text-muted);
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

.stat-value {
    color: var(--text);
    font-size: 0.9rem;
    font-variant-numeric: tabular-nums;
}

.stat-value.good { color: var(--success); }
.stat-value.warn { color: var(--accent); }

/* Print guide */
.print-guide {
    padding: 1.25rem;
}

.guide-row {
    display: flex;
    justify-content: space-between;
    padding: 0.45rem 0;
    border-bottom: 1px dotted var(--border);
    font-size: 0.78rem;
}

.guide-row:last-child {
    border-bottom: none;
}

.guide-label {
    color: var(--text-muted);
}

.guide-value {
    color: var(--text);
}

.regions-header {
    margin: 1rem 0 0.75rem 0;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
}

.region-list {
    list-style: none;
    margin: 0;
    padding: 0;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    font-size: 0.78rem;
}

.region-list li {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    color: var(--text);
}

.region-list em {
    color: var(--text-muted);
    font-style: normal;
    font-size: 0.72rem;
    margin-left: auto;
}

.swatch {
    width: 14px;
    height: 14px;
    border-radius: 3px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    flex-shrink: 0;
}

.page-footer {
    margin-top: 4rem;
    padding-top: 2rem;
    border-top: 1px solid var(--border);
    text-align: center;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    letter-spacing: 0.06em;
}

.page-footer a {
    color: var(--text-mid);
    text-decoration: none;
    border-bottom: 1px dotted var(--border-hi);
}

.page-footer a:hover {
    color: var(--accent);
    border-color: var(--accent);
}

.page-footer .brand-mark {
    color: var(--accent);
    font-size: 0.9rem;
    margin-right: 0.25rem;
}

/* ═══════════════════════════════════════════════════════════════════
   UTILITIES
   ═══════════════════════════════════════════════════════════════════ */

.hidden {
    display: none !important;
}

/* ═══════════════════════════════════════════════════════════════════
   RESPONSIVE
   ═══════════════════════════════════════════════════════════════════ */

@media (max-width: 880px) {
    .configure-grid,
    .download-grid {
        grid-template-columns: 1fr;
    }

    .viewer-container {
        height: 55vh;
        min-height: 360px;
    }

    .viewer-toolbar {
        top: auto;
        bottom: 1rem;
        right: 50%;
        transform: translateX(50%);
        flex-wrap: wrap;
        justify-content: center;
    }

    .viewer-hint {
        display: none;
    }

    .section {
        padding: 3rem 1rem;
    }

    .text-input,
    .select-input {
        width: 180px;
    }
}

@media (max-width: 560px) {
    .setting-row {
        grid-template-columns: 1fr;
        gap: 0.4rem;
    }

    .setting-row:not(.setting-row--toggle) .input-unit,
    .text-input,
    .select-input {
        width: 100%;
    }

    .drop-buttons {
        flex-direction: column;
    }

    .ghost-btn {
        width: 100%;
    }

    .download-button {
        flex-direction: column;
        text-align: center;
        gap: 0.75rem;
    }
}

/* ═══════════════════════════════════════════════════════════════════
   TOP NAV — shared between Hike and Area pages
   ═══════════════════════════════════════════════════════════════════ */

.top-nav {
    position: sticky;
    top: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0.9rem 1.5rem;
    background: rgba(20, 20, 20, 0.88);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
}

.top-nav-brand {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-family: var(--font-serif);
    font-size: 1.1rem;
    color: var(--text);
    text-decoration: none;
    letter-spacing: 0.08em;
}

.top-nav-brand .brand-mark {
    color: var(--accent);
    font-size: 1.05rem;
}

.top-nav-links {
    display: inline-flex;
    gap: 1.75rem;
}

.top-nav-link {
    position: relative;
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-mid);
    text-decoration: none;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    padding: 0.35rem 0;
    transition: color 0.15s ease;
}

.top-nav-link:hover {
    color: var(--text);
}

.top-nav-link.active {
    color: var(--accent);
}

.top-nav-link.active::after {
    content: "";
    position: absolute;
    left: 0;
    right: 0;
    bottom: -2px;
    height: 2px;
    background: var(--accent);
}

/* ═══════════════════════════════════════════════════════════════════
   MAP PICKER — Leaflet map container + overlay UI
   ═══════════════════════════════════════════════════════════════════ */

.map-wrap {
    position: relative;
    margin: 2rem 0 1.5rem;
    border: 1px solid var(--border-hi);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: 0 12px 48px rgba(0, 0, 0, 0.4);
}

.leaflet-map {
    height: 560px;
    width: 100%;
    background: #0a0a0a;
}

.map-hint {
    position: absolute;
    bottom: 1.5rem;
    left: 50%;
    transform: translateX(-50%);
    z-index: 400;
    font-family: var(--font-mono);
    font-size: 0.65rem;
    letter-spacing: 0.2em;
    color: var(--text-muted);
    background: rgba(20, 20, 20, 0.85);
    padding: 0.4rem 0.9rem;
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    pointer-events: none;
}

/* Layer switcher — Leaflet's default control restyled for the dark theme. */
.leaflet-control-layers {
    background: rgba(20, 20, 20, 0.92) !important;
    border: 1px solid var(--border-hi) !important;
    border-radius: var(--radius-sm) !important;
    color: var(--text-mid) !important;
    font-family: var(--font-mono) !important;
    font-size: 0.72rem !important;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4) !important;
}

.leaflet-control-layers-expanded {
    padding: 0.55rem 0.85rem !important;
}

.leaflet-control-layers label {
    display: flex !important;
    align-items: center;
    gap: 0.5rem;
    margin: 0.15rem 0 !important;
    cursor: pointer;
    color: var(--text-mid);
}

.leaflet-control-layers label:hover {
    color: var(--text);
}

.leaflet-control-layers input[type="radio"] {
    accent-color: var(--accent);
}

.leaflet-control-layers-separator {
    border-top: 1px solid var(--border) !important;
    margin: 0.45rem 0 !important;
}

/* Leaflet tweaks to match the cairn theme */
.leaflet-control-attribution {
    background: rgba(20, 20, 20, 0.72) !important;
    color: var(--text-muted) !important;
    font-family: var(--font-mono);
    font-size: 0.65rem;
}

.leaflet-control-attribution a {
    color: var(--text-mid) !important;
}

.leaflet-bar a {
    background-color: var(--surface) !important;
    color: var(--text) !important;
    border-color: var(--border-hi) !important;
}

.leaflet-bar a:hover {
    background-color: var(--surface-hi) !important;
    color: var(--accent) !important;
}

.leaflet-draw-toolbar a {
    background-color: var(--surface) !important;
    border-color: var(--border-hi) !important;
}

.leaflet-draw-actions a {
    background-color: var(--surface-hi) !important;
    color: var(--text) !important;
}

/* ═══════════════════════════════════════════════════════════════════
   GEOCODER (Nominatim search bar)
   ═══════════════════════════════════════════════════════════════════ */

.geocoder-wrap {
    margin-top: 2.5rem;
}

.geocoder-bar {
    display: flex;
    gap: 0.75rem;
    align-items: stretch;
}

.geocoder-bar .text-input {
    flex: 1;
}

.geocoder-results {
    display: flex;
    flex-direction: column;
    gap: 0.25rem;
    margin-top: 0.5rem;
}

.geocoder-result {
    text-align: left;
    padding: 0.55rem 0.8rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    color: var(--text-mid);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    cursor: pointer;
    transition: all 0.15s ease;
}

.geocoder-result:hover {
    border-color: var(--accent);
    color: var(--text);
}

.geocoder-loading, .geocoder-empty, .geocoder-error {
    cursor: default;
    color: var(--text-muted);
    font-style: italic;
}

.geocoder-error {
    color: var(--error);
}

/* ═══════════════════════════════════════════════════════════════════
   SELECTION PANEL — bbox summary after the user draws a rectangle
   ═══════════════════════════════════════════════════════════════════ */

.selection-wrap {
    margin: 0 auto 1.5rem;
    max-width: 640px;
}

.selection-empty {
    text-align: center;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-size: 0.78rem;
    letter-spacing: 0.06em;
    padding: 0.9rem;
}

.selection-panel {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 0.5rem 1.5rem;
    padding: 1rem 1.25rem;
    background: var(--surface);
    border: 1px solid var(--border-hi);
    border-radius: var(--radius);
}

.selection-panel--invalid {
    border-color: var(--error);
}

.selection-panel--invalid .selection-value {
    color: var(--error);
}

.selection-warning {
    margin-top: 0.5rem;
    padding: 0.65rem 0.85rem;
    background: rgba(208, 103, 103, 0.08);
    border: 1px solid var(--error);
    border-radius: var(--radius-sm);
    color: var(--error);
    font-family: var(--font-mono);
    font-size: 0.75rem;
    letter-spacing: 0.04em;
}

.selection-row {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: 1rem;
}

.selection-label {
    font-family: var(--font-mono);
    font-size: 0.68rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.selection-value {
    font-family: var(--font-mono);
    font-size: 0.82rem;
    color: var(--text);
    font-weight: 500;
}

@media (max-width: 640px) {
    .selection-panel {
        grid-template-columns: 1fr;
    }

    .leaflet-map {
        height: 420px;
    }

    .geocoder-bar {
        flex-direction: column;
    }
}

/* ═══════════════════════════════════════════════════════════════════
   MAP PICKER SECTION — scrolling layout (not a vh-locked hero)
   ═══════════════════════════════════════════════════════════════════ */

.section--picker {
    padding: 4rem 1.5rem 3rem;
}

.picker-hero {
    width: 100%;
    max-width: 680px;
    margin: 0 auto 2rem;
    text-align: center;
}

.picker-hero .hero-eyebrow {
    margin-bottom: 1.5rem;
}

.picker-hero .brand {
    justify-content: center;
    margin-bottom: 1.25rem;
}

.picker-hero .tagline {
    margin: 0 auto;
}

/* Search, map, selection panel, and continue button sit in centered
   columns under the hero block. */
.section--picker .geocoder-wrap,
.section--picker .map-wrap,
.section--picker .selection-wrap {
    width: 100%;
    max-width: 1100px;
    margin-left: auto;
    margin-right: auto;
}

.section--picker .continue-area {
    margin-top: 1.5rem;
    display: flex;
    justify-content: center;
}