/* =========================================================
   Meshtastic Rangetest Mapper - Public Site Styles
   ---------------------------------------------------------
   This stylesheet provides a consistent visual system for:
   - Main tool page
   - Documentation page
   - Troubleshooting page
   - About page

   Design goals:
   1. High readability in dark mode inspired by Meshtastic
   2. Strong contrast for form fields and map controls
   3. Mobile-friendly layout with clear spacing and touch targets
   ========================================================= */

/* =========================================================
   Design Tokens
   ========================================================= */
:root {
    --bg: #060b14;
    --bg-elevated: #0f1828;
    --bg-card: rgba(17, 29, 46, 0.86);
    --bg-card-strong: #121f33;
    --text: #e8eef8;
    --text-muted: #95a8c4;
    --text-soft: #b5c4db;
    --accent: #68efad;
    --accent-strong: #39d88f;
    --accent-dark: #0d4c34;
    --danger: #ff6f7e;
    --warning: #ffd479;
    --border: rgba(126, 157, 196, 0.28);
    --border-strong: rgba(126, 157, 196, 0.46);
    --shadow: 0 20px 35px rgba(0, 0, 0, 0.35);
    --radius-sm: 10px;
    --radius-md: 16px;
    --radius-lg: 24px;
    --content-max: 1200px;
    --space-1: 0.25rem;
    --space-2: 0.5rem;
    --space-3: 0.75rem;
    --space-4: 1rem;
    --space-5: 1.5rem;
    --space-6: 2rem;
    --space-7: 3rem;
}

/* =========================================================
   Global Base
   ========================================================= */
* {
    box-sizing: border-box;
}

html,
body {
    margin: 0;
    padding: 0;
}

body {
    min-height: 100vh;
    color: var(--text);
    font-family: 'Space Grotesk', 'Segoe UI', Tahoma, sans-serif;
    background:
        radial-gradient(1000px 600px at 82% -5%, rgba(92, 255, 176, 0.2), transparent 65%),
        radial-gradient(900px 480px at 10% 5%, rgba(53, 158, 255, 0.17), transparent 58%),
        linear-gradient(180deg, #050b14 0%, #071224 45%, #071527 100%);
    line-height: 1.6;
}

img {
    max-width: 100%;
    display: block;
}

a {
    color: var(--accent);
}

a:hover {
    color: #98ffd0;
}

.page {
    width: min(var(--content-max), 92vw);
    margin: 0 auto;
    padding: var(--space-6) 0 var(--space-7);
}

.section-title {
    margin: 0 0 var(--space-4);
    font-size: clamp(1.4rem, 2vw, 2rem);
    line-height: 1.2;
}

.section-intro {
    margin-top: 0;
    color: var(--text-soft);
}

.kicker {
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-size: 0.82rem;
    margin: 0 0 var(--space-2);
}

.inline-code {
    font-family: 'Fira Mono', Consolas, monospace;
    background: rgba(17, 29, 46, 0.9);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 0.1rem 0.35rem;
}

/* =========================================================
   Buttons and Inputs
   ========================================================= */
.btn {
    border: 1px solid transparent;
    border-radius: 999px;
    padding: 0.65rem 1.1rem;
    font: inherit;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.4rem;
    min-height: 42px;
    transition: transform 0.16s ease, box-shadow 0.16s ease, border-color 0.16s ease, background-color 0.16s ease;
}

.btn:hover {
    transform: translateY(-1px);
}

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

.btn-primary {
    background: linear-gradient(135deg, var(--accent), #7cffc5);
    color: #072113;
    box-shadow: 0 10px 20px rgba(59, 214, 144, 0.22);
}

.btn-primary:hover {
    background: linear-gradient(135deg, #7cf7bd, #a4ffd5);
}

.btn-secondary {
    background: rgba(20, 40, 65, 0.9);
    border-color: var(--border);
    color: var(--text);
}

.btn-secondary:hover {
    border-color: var(--border-strong);
    background: rgba(28, 48, 74, 0.95);
}

.btn-danger {
    background: rgba(127, 33, 45, 0.95);
    border-color: rgba(255, 111, 126, 0.5);
    color: #ffe8eb;
}

.btn-link {
    background: transparent;
    color: var(--accent);
    border-color: transparent;
}

.field-row {
    display: grid;
    gap: var(--space-2);
    margin-bottom: var(--space-4);
}

.field-row label {
    font-size: 0.92rem;
    color: var(--text-soft);
}

.field-row input,
.field-row select,
.field-row textarea {
    width: 100%;
    border: 1px solid var(--border);
    background: rgba(9, 17, 30, 0.95);
    color: var(--text);
    border-radius: var(--radius-sm);
    padding: 0.7rem 0.85rem;
    font: inherit;
}

.field-row textarea {
    resize: vertical;
    min-height: 120px;
}

.field-row input:focus,
.field-row select:focus,
.field-row textarea:focus {
    outline: 2px solid rgba(104, 239, 173, 0.25);
    border-color: var(--accent);
}

/* =========================================================
   Header / Navigation
   ========================================================= */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1200;
    border-bottom: 1px solid var(--border);
    backdrop-filter: blur(14px);
    background: rgba(6, 11, 20, 0.85);
}

.nav-shell {
    width: min(var(--content-max), 94vw);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--space-4);
    padding: 0.8rem 0;
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 0.7rem;
    text-decoration: none;
    color: var(--text);
    font-weight: 700;
}

.brand img {
    width: 34px;
    height: 34px;
    border-radius: 8px;
}

.nav-toggle {
    display: none;
    border: 1px solid var(--border);
    background: rgba(17, 29, 46, 0.9);
    color: var(--text);
    border-radius: 10px;
    padding: 0.45rem 0.65rem;
    font-size: 0.95rem;
}

.site-nav {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.site-nav a {
    text-decoration: none;
    color: var(--text-soft);
    font-weight: 500;
    padding: 0.45rem 0.7rem;
    border-radius: 999px;
    border: 1px solid transparent;
}

.site-nav a:hover {
    color: var(--text);
    border-color: var(--border);
    background: rgba(20, 36, 57, 0.8);
}

.site-nav a.is-active {
    color: #082010;
    background: var(--accent);
    border-color: transparent;
}

.site-nav .nav-donate {
    background: rgba(104, 239, 173, 0.16);
    border-color: rgba(104, 239, 173, 0.35);
    color: var(--accent);
    font-weight: 700;
}

.site-nav .nav-donate:hover {
    background: rgba(104, 239, 173, 0.25);
}

/* =========================================================
   Hero Section (Main Page)
   ========================================================= */
.hero {
    padding: var(--space-6);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    background: linear-gradient(140deg, rgba(14, 26, 44, 0.95), rgba(9, 19, 35, 0.88));
    box-shadow: var(--shadow);
    overflow: hidden;
    position: relative;
}

.hero::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(400px 180px at 80% 16%, rgba(104, 239, 173, 0.16), transparent 70%);
    pointer-events: none;
}

.hero-grid {
    display: grid;
    gap: var(--space-6);
    grid-template-columns: 1.3fr 1fr;
    align-items: center;
}

.hero h1 {
    margin: 0 0 var(--space-4);
    font-size: clamp(2rem, 5vw, 3.4rem);
    line-height: 1.08;
    max-width: 18ch;
}

.hero p {
    color: var(--text-soft);
    margin: 0 0 var(--space-5);
    max-width: 60ch;
}

.hero-actions {
    display: flex;
    gap: var(--space-3);
    flex-wrap: wrap;
}

.hero-card {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: rgba(9, 18, 31, 0.9);
    padding: var(--space-5);
}

.hero-stat-grid {
    display: grid;
    gap: var(--space-3);
    grid-template-columns: repeat(2, minmax(120px, 1fr));
}

.hero-stat {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: var(--space-3);
    background: rgba(14, 28, 45, 0.8);
}

.hero-stat strong {
    font-size: 1.2rem;
    display: block;
}

/* =========================================================
   Generic Card Layout
   ========================================================= */
.card {
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: var(--bg-card);
    box-shadow: var(--shadow);
    padding: var(--space-5);
    margin-top: var(--space-6);
}

.card h2,
.card h3 {
    margin-top: 0;
}

.split-grid {
    display: grid;
    gap: var(--space-5);
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

/* =========================================================
   Quick Guide
   ========================================================= */
.quick-guide-list {
    margin: 0;
    padding-left: 1.1rem;
    display: grid;
    gap: 0.7rem;
}

.quick-guide-tip {
    margin-top: var(--space-4);
    border-left: 3px solid var(--accent);
    padding: 0.65rem 0 0.65rem 0.85rem;
    color: var(--text-soft);
    background: rgba(15, 31, 50, 0.8);
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
}

/* =========================================================
   Tool Area
   ========================================================= */
.file-upload {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    gap: var(--space-3);
    align-items: end;
    margin-bottom: var(--space-5);
}

.file-upload .or-text {
    color: var(--text-muted);
    text-align: center;
    font-size: 0.86rem;
    margin-bottom: 0.4rem;
}

.upload-input {
    border: 1px dashed var(--border-strong);
    border-radius: var(--radius-sm);
    padding: 0.7rem;
    background: rgba(8, 17, 29, 0.9);
}

#map {
    height: clamp(380px, 58vh, 720px);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    overflow: hidden;
}

.info-panel {
    margin-top: var(--space-4);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    background: rgba(12, 23, 37, 0.9);
    padding: var(--space-4);
}

.session-summary-card {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: var(--space-3);
    background: rgba(15, 27, 44, 0.85);
    margin-bottom: var(--space-3);
}

.session-summary-actions {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
}

.info-panel-actions {
    display: flex;
    gap: var(--space-2);
    flex-wrap: wrap;
    margin-top: var(--space-4);
}

.status-banner {
    display: none;
    margin-top: var(--space-4);
    border-radius: var(--radius-sm);
    border: 1px solid var(--border);
    padding: 0.7rem 0.85rem;
    font-weight: 500;
}

.status-banner.is-visible {
    display: block;
}

.status-banner.info {
    color: #d5e6ff;
    background: rgba(19, 43, 78, 0.9);
}

.status-banner.success {
    color: #ddffe7;
    background: rgba(18, 68, 47, 0.9);
    border-color: rgba(117, 255, 181, 0.45);
}

.status-banner.error {
    color: #ffe2e6;
    background: rgba(78, 23, 36, 0.9);
    border-color: rgba(255, 111, 126, 0.45);
}

/* =========================================================
   Feedback Form
   ========================================================= */
.feedback-grid {
    display: grid;
    gap: var(--space-4);
    grid-template-columns: repeat(2, minmax(0, 1fr));
}

.feedback-help {
    color: var(--text-soft);
}

.feedback-note {
    font-size: 0.88rem;
    color: var(--text-muted);
    margin-top: var(--space-2);
}

.feedback-response {
    margin-top: var(--space-3);
    min-height: 1.2rem;
    color: var(--text-soft);
}

.feedback-response.error {
    color: #ffc3cb;
}

.feedback-response.success {
    color: #b5ffd2;
}

/* =========================================================
   Leaflet Legend and Controls
   ========================================================= */
.legend {
    line-height: 1.35;
    color: #d5e3f8;
    background: rgba(12, 22, 37, 0.95);
    padding: 0.55rem 0.65rem;
    border-radius: 10px;
    border: 1px solid var(--border);
    min-width: 190px;
}

.legend .legend-title {
    font-weight: 700;
    margin-bottom: 0.25rem;
    color: #eff7ff;
}

.legend .legend-title.legend-section {
    margin-top: 0.45rem;
    padding-top: 0.35rem;
    border-top: 1px solid rgba(126, 157, 196, 0.24);
}

.legend-row {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.8rem;
    margin-bottom: 0.2rem;
}

.legend-row:last-child {
    margin-bottom: 0;
}

.legend-swatch {
    width: 14px;
    height: 14px;
    border-radius: 3px;
    display: inline-block;
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.legend-swatch.dynamic {
    background: var(--swatch-color);
}

.legend-swatch.round {
    border-radius: 99px;
}

.legend-swatch.coverage {
    background: rgba(0, 255, 0, 0.2);
    border-color: #00aa00;
}

.legend-swatch.sender {
    background: transparent;
    border: 1px dashed rgba(255, 255, 255, 0.45);
    width: 18px;
    height: 18px;
    text-align: center;
    font-size: 0.78rem;
    line-height: 16px;
}

.map-control-panel {
    background: transparent;
}

.map-control-card {
    background: rgba(12, 22, 37, 0.95);
    padding: 0.6rem 0.65rem;
    border-radius: 10px;
    border: 1px solid var(--border);
    display: grid;
    gap: 0.5rem;
}

.map-toggle-row {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.82rem;
    color: #d8e6fa;
}

.map-toggle-row input[type="checkbox"] {
    accent-color: var(--accent);
}

/* =========================================================
   Marker and Popup Styling
   ========================================================= */
.sender-marker {
    background: transparent;
    border: none;
    font-size: 24px;
    text-align: center;
    line-height: 30px;
    cursor: pointer;
    filter: drop-shadow(0 3px 4px rgba(0, 0, 0, 0.45));
}

.marker-popup {
    font-size: 13px;
    line-height: 1.4;
    color: #122;
}

.marker-popup h4 {
    margin: 0 0 0.3rem;
    font-size: 0.95rem;
}

.marker-popup .popup-row {
    margin-bottom: 0.18rem;
}

.marker-popup .popup-row:last-child {
    margin-bottom: 0;
}

.marker-popup .popup-note-button {
    margin-top: 0.45rem;
    border-radius: 999px;
    border: 1px solid #3a6fa8;
    background: #4575b4;
    color: #fff;
    padding: 0.28rem 0.62rem;
    font-size: 0.76rem;
    cursor: pointer;
}

.marker-popup .popup-note-button:hover {
    background: #2d629f;
}

/* =========================================================
   Session Configuration Dialog
   ========================================================= */
.dialog-overlay {
    position: fixed;
    inset: 0;
    background: rgba(3, 8, 14, 0.75);
    backdrop-filter: blur(4px);
    z-index: 1900;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-4);
}

.session-dialog {
    width: min(900px, 95vw);
    max-height: 86vh;
    overflow-y: auto;
    background: #0f1c2e;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow);
    padding: var(--space-5);
}

.session-dialog h3 {
    margin-top: 0;
}

.session-item {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: var(--space-4);
    background: rgba(15, 30, 48, 0.95);
    margin-bottom: var(--space-3);
}

.session-select-row {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    margin-bottom: var(--space-2);
}

.session-select-row input[type="checkbox"] {
    transform: scale(1.1);
    accent-color: var(--accent);
}

.session-meta {
    font-size: 0.85rem;
    color: var(--text-muted);
    margin-bottom: var(--space-3);
}

.sender-location-toggle {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: rgba(7, 14, 25, 0.7);
    padding: var(--space-2) var(--space-3);
    margin-bottom: var(--space-3);
}

.sender-location-toggle label {
    display: flex;
    align-items: center;
    gap: var(--space-2);
    font-size: 0.86rem;
    cursor: pointer;
}

.sender-location-toggle small {
    display: block;
    color: var(--text-muted);
    margin-top: 0.2rem;
    margin-left: 1.45rem;
}

.session-dialog-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--space-2);
    margin-top: var(--space-5);
}

/* =========================================================
   Docs / Troubleshooting / About Content
   ========================================================= */
.docs-grid {
    display: grid;
    gap: var(--space-5);
}

.docs-grid .card {
    margin-top: 0;
}

.detail-list {
    padding-left: 1rem;
    margin: 0;
}

.detail-list li {
    margin-bottom: 0.45rem;
}

.code-block {
    font-family: 'Fira Mono', Consolas, monospace;
    font-size: 0.85rem;
    white-space: pre-wrap;
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    background: rgba(5, 11, 20, 0.95);
    color: #dff6eb;
    padding: var(--space-4);
    overflow-x: auto;
}

.troubleshooting-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.92rem;
}

.troubleshooting-table th,
.troubleshooting-table td {
    border: 1px solid var(--border);
    padding: 0.7rem;
    vertical-align: top;
}

.troubleshooting-table th {
    text-align: left;
    background: rgba(18, 36, 58, 0.95);
}

.table-wrap {
    overflow-x: auto;
}

.about-grid {
    display: grid;
    gap: var(--space-5);
    grid-template-columns: 1.2fr 1fr;
}

.cat-gallery {
    display: grid;
    gap: var(--space-3);
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.cat-card {
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    overflow: hidden;
    background: rgba(11, 23, 38, 0.92);
}

.cat-card .cat-caption {
    padding: 0.55rem 0.65rem;
    font-size: 0.84rem;
    color: var(--text-soft);
}

/* =========================================================
   Footer
   ========================================================= */
.site-footer {
    border-top: 1px solid var(--border);
    padding: var(--space-5) 0;
    margin-top: var(--space-7);
    color: var(--text-muted);
    font-size: 0.9rem;
}

.site-footer p {
    margin: 0.2rem 0;
}

/* =========================================================
   Responsive Layout
   ========================================================= */
@media (max-width: 980px) {
    .hero-grid,
    .split-grid,
    .feedback-grid,
    .about-grid {
        grid-template-columns: 1fr;
    }

    .file-upload {
        grid-template-columns: 1fr;
    }

    .file-upload .or-text {
        margin-bottom: 0;
    }

    .cat-gallery {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 860px) {
    .nav-toggle {
        display: inline-flex;
    }

    .site-nav {
        position: absolute;
        left: 3vw;
        right: 3vw;
        top: 64px;
        display: none;
        flex-direction: column;
        align-items: stretch;
        background: rgba(9, 17, 30, 0.98);
        border: 1px solid var(--border);
        border-radius: var(--radius-md);
        padding: 0.5rem;
        box-shadow: var(--shadow);
    }

    .site-nav.is-open {
        display: flex;
    }

    .site-nav a {
        border-radius: 10px;
        text-align: left;
    }
}

@media (max-width: 640px) {
    .hero {
        padding: var(--space-5);
    }

    .page {
        width: 94vw;
    }

    .cat-gallery {
        grid-template-columns: 1fr;
    }

    .session-dialog {
        padding: var(--space-4);
    }

    .session-dialog-actions {
        flex-direction: column;
    }

    .session-dialog-actions .btn {
        width: 100%;
    }
}