/* MultiDeco JS - Styles matching Android MultiDeco app */
:root {
    --primary: #1565C0;
    --primary-dark: #0D47A1;
    --primary-light: #42A5F5;
    --accent: #FF6F00;
    --bg: #FAFAFA;
    --surface: #FFFFFF;
    --text: #212121;
    --text-secondary: #757575;
    --border: #BDBDBD;
    --divider: #E0E0E0;
    --error: #D32F2F;
    --success: #388E3C;
    --warn-high-ppo2: #FF5722;
    --warn-cns: #FF9800;
    --warn-otu: #FFC107;
    --stop-bg: #E3F2FD;
    --header-height: 48px;
}

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

body {
    font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    color: var(--text);
    background: var(--bg);
    min-height: 100vh;
}

/* Top App Bar */
.app-bar {
    background: var(--primary);
    color: white;
    height: var(--header-height);
    display: flex;
    align-items: center;
    padding: 0 16px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.2);
    position: sticky;
    top: 0;
    z-index: 100;
}
.app-bar h1 {
    font-size: 18px;
    font-weight: 500;
    flex: 1;
    line-height: 1;
}
.app-bar-btn {
    background: none;
    border: none;
    color: white;
    font-size: 13px;
    padding: 6px 12px;
    cursor: pointer;
    border-radius: 4px;
    margin-left: 4px;
}
.app-bar-btn:hover { background: rgba(255,255,255,0.15); }
.app-bar-btn.active { background: rgba(255,255,255,0.25); font-weight: 600; }

/* Screen container */
.screen {
    display: none;
    padding: 12px;
    max-width: 900px;
    margin: 0 auto;
}
.screen.active {
    display: block;
    animation: screenFadeIn 0.2s ease;
}
@keyframes screenFadeIn {
    from { opacity: 0; }
    to   { opacity: 1; }
}

/* Cards / Sections */
.card {
    background: var(--surface);
    border: 1px solid var(--divider);
    border-radius: 6px;
    margin-bottom: 12px;
    overflow: hidden;
}
.card-header {
    background: var(--primary);
    color: white;
    padding: 8px 12px;
    font-size: 13px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    text-align: center;
}
.card-body { padding: 12px; }

/* Form rows */
.form-row {
    display: flex;
    align-items: center;
    margin-bottom: 8px;
    gap: 8px;
}
.form-row label {
    min-width: 120px;
    font-size: 13px;
    color: var(--text-secondary);
}
.form-row select, .form-row input[type="number"], .form-row input[type="text"] {
    padding: 6px 8px;
    border: 1px solid var(--border);
    border-radius: 4px;
    font-size: 13px;
    background: white;
    min-width: 80px;
}
.form-row select:focus, .form-row input:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(21,101,192,0.2);
}

/* Tables */
table.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 13px;
    background: #ffffff;
}
table.data-table th {
    background: var(--primary);
    color: white;
    padding: 6px 8px;
    text-align: center;
    font-weight: 500;
    font-size: 12px;
}
table.data-table td {
    padding: 5px 8px;
    text-align: center;
    border-bottom: 1px solid var(--divider);
    color: #333;
}
table.data-table tr:nth-child(even) { background: #F5F5F5; }
table.data-table tr:hover { background: #E3F2FD; }
table.data-table tr.stop-row { background: var(--stop-bg); }
table.data-table tr.descent-row { background: #FFF3E0; }
table.data-table tr.surface-row { background: #E8F5E9; font-weight: 600; }

/* Buttons */
.btn {
    padding: 8px 16px;
    border: none;
    border-radius: 4px;
    cursor: pointer;
    font-size: 13px;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: background 0.2s;
}
.btn-primary {
    background: var(--primary);
    color: white;
}
.btn-primary:hover { background: var(--primary-dark); }
.btn-accent {
    background: var(--accent);
    color: white;
}
.btn-accent:hover { background: #E65100; }
.btn-danger {
    background: var(--error);
    color: white;
}
.btn-danger:hover { background: #B71C1C; }
.btn-outline {
    background: transparent;
    color: var(--primary);
    border: 1px solid var(--primary);
}
.btn-outline:hover { background: #E3F2FD; }
.btn-sm { padding: 4px 10px; font-size: 12px; }

.btn-group {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin: 8px 0;
}

/* Main planner split view */
.planner-split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}
@media (max-width: 700px) {
    .planner-split { grid-template-columns: 1fr; }
}

/* Level / Deco item rows (in the main planner) */
.item-row {
    display: flex;
    align-items: center;
    padding: 4px 8px;
    border-bottom: 1px solid var(--divider);
    font-size: 13px;
    gap: 6px;
}
.item-row input[type="checkbox"] { margin-right: 4px; }
.item-row .item-depth { font-weight: 600; min-width: 50px; }
.item-row .item-time { min-width: 40px; }
.item-row .item-gas { color: var(--primary); min-width: 60px; }

/* Result panel */
.result-summary {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: 8px;
    margin-bottom: 12px;
}
.result-stat {
    background: var(--surface);
    border: 1px solid var(--divider);
    border-radius: 4px;
    padding: 8px 12px;
    text-align: center;
}
.result-stat .stat-value {
    font-size: 20px;
    font-style: italic;
    color: var(--primary);
}
.result-stat .stat-label {
    font-size: 11px;
    color: var(--text-secondary);
    text-transform: uppercase;
}

/* Warnings */
.warning {
    background: #FFF3E0;
    border-left: 4px solid #FF9800;
    padding: 8px 12px;
    margin: 8px 0;
    font-size: 13px;
    border-radius: 0 4px 4px 0;
}
.warning.error {
    background: #FFEBEE;
    border-left-color: var(--error);
}

/* Config sections */
.config-section {
    margin-bottom: 16px;
}
.config-section h3 {
    font-size: 14px;
    color: var(--primary);
    margin-bottom: 8px;
    padding-bottom: 4px;
    border-bottom: 1px solid var(--divider);
}

/* Tool result display */
.tool-result {
    background: #E8F5E9;
    border: 1px solid #A5D6A7;
    border-radius: 4px;
    padding: 12px;
    margin: 8px 0;
    font-size: 15px;
    text-align: center;
}
.tool-result .result-value {
    font-size: 24px;
    font-style: italic;
    color: var(--success);
}

/* Tabs for tools */
.tabs {
    display: flex;
    border-bottom: 2px solid var(--primary);
    margin-bottom: 12px;
    overflow-x: auto;
}
.tab {
    padding: 8px 16px;
    cursor: pointer;
    font-size: 12px;
    font-weight: 500;
    color: var(--text-secondary);
    border: none;
    background: none;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
    border-bottom: 3px solid transparent;
    margin-bottom: -2px;
}
.tab:hover { background: #E3F2FD; }
.tab.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    font-weight: 600;
}

.tool-panel { display: block; }

/* Footer */
.footer-bar {
    display: flex;
    justify-content: center;
    gap: 8px;
    padding: 12px;
    flex-wrap: wrap;
}

/* Tissue mini-chart grid */
.tissue-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 6px;
}
.tissue-mini {
    background: #ffffff;
    border: 1px solid var(--divider);
    border-radius: 4px;
    padding: 2px;
}
@media (max-width: 900px) {
    .tissue-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 480px) {
    .tissue-grid { grid-template-columns: 1fr; }
}

/* Sticky result action bar (bottom), mirrors .app-bar behavior at top */
.result-actionbar {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    background: #ffffff;
    border-top: 1px solid var(--divider);
    padding: 10px 12px;
    display: flex;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
    z-index: 90;
    opacity: 0;
    visibility: hidden;
    transform: translateY(8px);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0s linear 0.2s;
}
.result-actionbar.visible {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
    transition: opacity 0.2s ease, transform 0.2s ease, visibility 0s linear 0s;
}

/* Modal / Dialog */
.modal-overlay {
    display: none;
    position: fixed;
    top: 0; left: 0; right: 0; bottom: 0;
    background: rgba(0,0,0,0.5);
    -webkit-backdrop-filter: blur(3px);
    backdrop-filter: blur(3px);
    z-index: 200;
    align-items: center;
    justify-content: center;
}
.modal-overlay.active { display: flex; }
.modal {
    background: var(--surface);
    border-radius: 8px;
    padding: 20px;
    min-width: 320px;
    max-width: 500px;
    max-height: 80vh;
    overflow-y: auto;
    box-shadow: 0 8px 24px rgba(0,0,0,0.3);
}

/* Alert/Confirm modal */
.alert-modal-text {
    font-size: 14px;
    color: var(--text);
    line-height: 1.5;
    margin-bottom: 16px;
}
.alert-modal-buttons {
    display: flex;
    justify-content: flex-end;
    gap: 8px;
}
.modal h3 {
    margin-bottom: 12px;
    color: var(--primary);
}

/* Surface Interval spinners */
.si-spinners {
    display: flex;
    justify-content: center;
    gap: 16px;
}
.si-spinner-col {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}
.si-input {
    width: 60px;
    text-align: center;
    font-size: 22px;
    font-weight: bold;
    padding: 6px 2px;
    border: 1px solid var(--border);
    border-radius: 6px;
    background: var(--surface);
    color: var(--text);
    -moz-appearance: textfield;
}
.si-input::-webkit-outer-spin-button,
.si-input::-webkit-inner-spin-button { -webkit-appearance: none; }
.si-arrow {
    background: none;
    border: 1px solid var(--border);
    border-radius: 4px;
    width: 60px;
    height: 28px;
    font-size: 14px;
    cursor: pointer;
    color: var(--primary);
    line-height: 1;
}
.si-arrow:active { background: var(--primary); color: #fff; }
.si-label {
    font-size: 11px;
    color: var(--text-secondary);
    margin-top: 2px;
}

/* Inline radio group */
.radio-group {
    display: flex;
    gap: 12px;
}
.radio-group label {
    display: flex;
    align-items: center;
    gap: 4px;
    font-size: 13px;
    cursor: pointer;
    min-width: auto;
}

/* Toggle switch */
.toggle-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6px 0;
}

/* Copy area */
.copy-area {
    font-family: 'Consolas', 'Courier New', monospace;
    font-size: 12px;
    white-space: pre;
    background: #F5F5F5;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 4px;
    overflow-x: auto;
    max-height: 400px;
    overflow-y: auto;
}

/* About */
.about-content {
    text-align: center;
    padding: 20px;
}
.about-content h2 { color: var(--primary); margin-bottom: 8px; }
.about-content p { color: var(--text-secondary); margin-bottom: 4px; }

/* ===== MOBILE FIXES ===== */
@media (max-width: 400px) {
    /* App-bar title: allow wrap with zero gap between lines */
    .app-bar {
        height: auto;
        min-height: var(--header-height);
        padding-top: 6px;
        padding-bottom: 6px;
        align-items: center;
    }
    .app-bar h1 {
        font-size: 16px;
        line-height: 1;
    }
}

/* Result summary pre (light) */
.result-summary-pre {
    margin: 12px 0 0;
    padding: 10px;
    background: #ffffff;
    color: #000000;
    border-radius: 4px;
    font-size: 12px;
    line-height: 1.6;
    white-space: pre;
}

/* Grid plan table (light) */
#result-grid-plan .data-table { background: #ffffff; color: #000000; }

/* ===== HELP / FAQ SCREEN (light) ===== */
.help-card .card-header { color: var(--accent-color, #1976d2); }
.help-tabs {
    display: flex;
    flex-wrap: wrap;
    gap: 0;
    border-bottom: 2px solid #e0e0e0;
    background: #fafafa;
    padding: 0 8px;
}
.help-tab {
    background: transparent;
    border: none;
    padding: 10px 14px;
    font-size: 13px;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: color .15s, border-color .15s;
    margin-bottom: -2px;
    white-space: nowrap;
    font-family: inherit;
}
.help-tab:hover { color: var(--text-primary); }
.help-tab.active {
    color: #1976d2;
    border-bottom-color: #1976d2;
}
.help-content { padding: 12px 14px; }
.help-panel { display: none; }
.help-panel.active { display: block; }
.help-item {
    border: 1px solid #e0e0e0;
    border-radius: 6px;
    margin-bottom: 8px;
    background: #ffffff;
    overflow: hidden;
    transition: box-shadow .15s;
}
.help-item[open] { box-shadow: 0 1px 3px rgba(0,0,0,.06); }
.help-item summary {
    cursor: pointer;
    padding: 10px 14px;
    font-weight: 600;
    font-size: 14px;
    color: var(--text-primary);
    list-style: none;
    position: relative;
    user-select: none;
    padding-right: 36px;
}
.help-item summary::-webkit-details-marker { display: none; }
.help-item summary::after {
    content: '+';
    position: absolute;
    right: 14px;
    top: 50%;
    transform: translateY(-50%);
    font-size: 18px;
    line-height: 1;
    color: var(--text-secondary);
    transition: transform .15s;
}
.help-item[open] summary::after { content: '−'; }
.help-item summary:hover { background: #f5f5f5; }
.help-answer {
    padding: 0 14px 12px;
    font-size: 13px;
    line-height: 1.55;
    color: var(--text-primary);
}
.help-answer p { margin: 0 0 8px; }
.help-answer p:last-child { margin-bottom: 0; }
.help-answer ul { margin: 0 0 8px 18px; padding: 0; }
.help-answer li { margin-bottom: 4px; }

.help-about { padding: 4px 4px 8px; }
.help-about h2 { margin: 0 0 4px; font-size: 22px; color: var(--text-primary); }
.help-about p { font-size: 12px; color: var(--text-secondary); margin: 12px 0 0; line-height: 1.5; }
.help-about p:first-of-type { font-size: 14px; color: var(--text-primary); margin-top: 0; }
.help-about a { color: #1976d2; text-decoration: none; }
.help-about a:hover { text-decoration: underline; }

.help-answer h4.help-section {
    font-weight: 400;
    font-size: 14px;
    font-style: italic;
    color: var(--text-primary);
    margin: 12px 0 6px;
}
.help-answer h4.help-section:first-child { margin-top: 0; }

/* Help — plan-leg tables: outer border + thin vertical separators */
.help-answer table.data-table {
    border: 1px solid var(--divider);
}
.help-answer table.data-table th,
.help-answer table.data-table td {
    border-right: 1px solid var(--divider);
}
.help-answer table.data-table th:last-child,
.help-answer table.data-table td:last-child {
    border-right: none;
}

/* Tools — calculator results: bold instead of italic */
#screen-tools .result-stat .stat-value,
#screen-tools .tool-result .result-value {
    font-style: normal;
    font-weight: 700;
}