/* === RouteSense — Design System (Farmesh Aesthetic) ============== */
/* Fonts loaded via Google Fonts in index.html                       */

/* ─── Design Tokens ────────────────────────────────────────────── */
:root {
    /* Warm neutral surface */
    --surface-base:   hsl(40 33% 97%);
    --surface-muted:  hsl(35 25% 92%);
    --surface-card:   hsl(40 30% 95%);
    --surface-dark:   hsl(30 10% 12%);

    /* Warm borders */
    --border-subtle:  hsl(30 15% 88%);
    --border-soft:    hsl(30 15% 82%);
    --border-default: hsl(30 15% 76%);
    --border-focus:   #16a34a;

    /* Warm text */
    --text-default:   hsl(30 10% 15%);
    --text-muted:     hsl(30 10% 30%);
    --text-subtle:    hsl(30 8% 38%);
    --text-faint:     hsl(30 8% 46%);

    /* Accent — green primary, amber secondary */
    --accent-green:        #16a34a;
    --accent-green-dark:   #15803d;
    --accent-green-light:  #f0fdf4;
    --accent-amber:        #d97706;
    --accent-amber-dark:   #b45309;
    --accent-amber-light:  #fffbeb;
    --accent-red:          #dc2626;
    --accent-red-light:    #fef2f2;

    /* Typography */
    --font-primary:   'Inter', system-ui, -apple-system, sans-serif;

    /* Legacy aliases — referenced by existing JS/CSS consumers */
    --primary:        var(--accent-green);
    --primary-dark:   var(--accent-green-dark);
    --secondary:      var(--accent-amber);
    --danger:         var(--accent-red);
    --warning:        var(--accent-amber);
    --bg-light:       var(--surface-muted);
    --bg-white:       var(--surface-base);
    --text-primary:   var(--text-default);
    --text-secondary: var(--text-muted);
    --border:         var(--border-soft);
    --shadow:         hsl(30 10% 15% / 0.08);
    --dark-navy:      var(--surface-dark);
    --amazon-teal:    var(--accent-green);
}

/* ─── Reset & Base ──────────────────────────────────────────────── */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    height: 100%;
}

body {
    font-family: var(--font-primary);
    background: var(--surface-base);
    color: var(--text-default);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-primary);
    font-weight: 600;
    letter-spacing: -0.01em;
}

input::placeholder,
textarea::placeholder {
    color: var(--text-faint);
    opacity: 1;
}

::selection {
    background: hsl(140 50% 40% / 0.12);
    color: hsl(30 10% 15%);
}

/* Thin premium scrollbar */
::-webkit-scrollbar               { width: 5px; }
::-webkit-scrollbar-track         { background: transparent; }
::-webkit-scrollbar-thumb         { background: hsl(30 15% 75% / 0.4); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover   { background: hsl(30 15% 75% / 0.65); }

/* ─── Site Header ───────────────────────────────────────────────── */
.site-header {
    position: sticky;
    top: 0;
    z-index: 50;
    border-bottom: 1px solid var(--border-soft);
    background: hsl(40 33% 97% / 0.96);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    transition: all 0.3s ease;
}

.header-inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 16px 32px;
}

.header-brand {
    display: flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
}

.brand-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    background: var(--accent-green);
    color: white;
    font-size: 15px;
    flex-shrink: 0;
}

.brand-name {
    font-family: var(--font-primary);
    font-size: 1.25rem;
    font-weight: 500;
    letter-spacing: -0.02em;
    color: var(--text-default);
}

.header-tagline {
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--text-muted);
}

/* ─── Main Content ──────────────────────────────────────────────── */
.main-content {
    padding: 32px 24px;
    flex: 1;
}

/* ─── Container ─────────────────────────────────────────────────── */
.container {
    max-width: 1400px;
    margin: 0 auto;
}

/* ─── Tabs ──────────────────────────────────────────────────────── */
.tabs {
    display: flex;
    border-bottom: 1px solid var(--border-soft);
    overflow-x: auto;
    margin-bottom: 32px;
}

.tab-button {
    padding: 12px 20px;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    margin-bottom: -1px;
    color: var(--text-muted);
    font-family: var(--font-primary);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    cursor: pointer;
    transition: color 0.3s ease, border-color 0.3s ease;
    white-space: nowrap;
}

.tab-button:hover {
    color: var(--accent-green);
}

.tab-button.active {
    color: var(--accent-green);
    border-bottom-color: var(--accent-green);
}

/* ─── Tab Content ───────────────────────────────────────────────── */
.tab-content {
    min-height: 500px;
}

.tab-panel {
    display: none;
    animation: fade-in 0.3s ease;
}

.tab-panel.active {
    display: block;
}

@keyframes fade-in {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes fade-in-up {
    from { opacity: 0; transform: translateY(22px); }
    to   { opacity: 1; transform: translateY(0); }
}

@keyframes stagger-fade-in {
    from { opacity: 0; transform: translateY(16px); }
    to   { opacity: 1; transform: translateY(0); }
}

.tab-panel h3 {
    font-size: 1.6rem;
    margin-bottom: 4px;
    color: var(--text-default);
}

/* ─── Section Label ─────────────────────────────────────────────── */
.section-label {
    display: block;
    font-family: var(--font-primary);
    font-size: 0.68rem;
    font-weight: 600;
    letter-spacing: 0.3em;
    text-transform: uppercase;
    color: var(--accent-green);
    margin-bottom: 6px;
}

.section-intro {
    font-size: 0.875rem;
    color: var(--text-muted);
    margin-bottom: 28px;
    margin-top: 4px;
}

/* ─── Cards ─────────────────────────────────────────────────────── */
.card {
    background: var(--surface-card);
    border: 1px solid var(--border-soft);
    padding: 24px;
    margin-bottom: 20px;
    transition: transform 0.4s ease-out, box-shadow 0.4s ease-out;
}

.card:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px -8px hsl(30 10% 15% / 0.1);
}

.card h4 {
    font-size: 1.1rem;
    margin-bottom: 16px;
    color: var(--text-default);
}

/* ─── Grid Layouts ──────────────────────────────────────────────── */
.grid-2 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 20px;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 16px;
    margin-bottom: 32px;
}

/* ─── Form Elements ─────────────────────────────────────────────── */
.form-group {
    margin-bottom: 16px;
}

.form-group label {
    display: block;
    margin-bottom: 6px;
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-default);
}

.form-group input,
.form-group select {
    width: 100%;
    padding: 10px 12px;
    border: 1px solid var(--border-default);
    background: var(--surface-base);
    color: var(--text-default);
    font-family: var(--font-primary);
    font-size: 0.9rem;
    border-radius: 0;
    transition: border-color 0.3s ease, box-shadow 0.3s ease;
    appearance: auto;
}

.form-group input:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--border-focus);
    box-shadow: 0 0 0 3px hsl(140 60% 40% / 0.1);
}

.form-group small {
    display: block;
    margin-top: 5px;
    color: var(--text-subtle);
    font-size: 0.8rem;
}

/* ─── Buttons ───────────────────────────────────────────────────── */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border: none;
    font-family: var(--font-primary);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    cursor: pointer;
    transition: all 0.3s ease;
    border-radius: 0;
}

.btn-primary {
    background: var(--accent-green);
    color: white;
}

.btn-primary:hover {
    background: var(--accent-green-dark);
    transform: translateY(-2px);
}

.btn-secondary {
    background: transparent;
    color: var(--text-muted);
    border: 1px solid var(--border-default);
    margin-left: 8px;
}

.btn-secondary:hover {
    background: var(--surface-muted);
    color: var(--text-default);
}

.btn-large {
    padding: 16px 40px;
    font-size: 0.8rem;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.center {
    text-align: center;
    margin-top: 32px;
}

/* ─── Canvas ────────────────────────────────────────────────────── */
canvas {
    border: 1px solid var(--border-default);
    cursor: crosshair;
    display: block;
    margin: 0 auto;
    background: var(--surface-base);
}

canvas:hover {
    border-color: var(--accent-green);
}

/* ─── Stops List ────────────────────────────────────────────────── */
.stops-list {
    max-height: 400px;
    overflow-y: auto;
    padding: 4px 0;
}

.stop-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 12px;
    margin-bottom: 6px;
    background: var(--surface-base);
    border: 1px solid var(--border-subtle);
    transition: background 0.2s ease;
}

.stop-item:hover {
    background: var(--surface-muted);
}

.stop-item.depot {
    background: var(--accent-green-light);
    border-color: var(--accent-green);
}

.stop-info {
    flex: 1;
}

.stop-id {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--text-default);
}

.stop-coords {
    color: var(--text-subtle);
    font-size: 0.8rem;
}

.btn-remove {
    background: transparent;
    color: var(--accent-red);
    border: 1px solid var(--accent-red);
    padding: 4px 10px;
    cursor: pointer;
    font-family: var(--font-primary);
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    transition: all 0.2s ease;
    border-radius: 0;
}

.btn-remove:hover {
    background: var(--accent-red);
    color: white;
}

/* ─── Metric Cards ──────────────────────────────────────────────── */
.metric-card {
    background: var(--surface-card);
    border: 1px solid var(--border-soft);
    padding: 24px;
    transition: transform 0.4s ease-out, box-shadow 0.4s ease-out;
}

.metric-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 32px -8px hsl(30 10% 15% / 0.1);
}

/* Replace gradient backgrounds with clean bordered cards */
.gradient-purple,
.gradient-green,
.gradient-orange,
.gradient-red {
    background: var(--surface-card);
    color: var(--text-default);
}

.metric-label {
    font-family: var(--font-primary);
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.2em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.metric-value {
    font-family: var(--font-primary);
    font-size: 2.5rem;
    font-weight: 500;
    letter-spacing: -0.02em;
    line-height: 1;
    color: var(--text-default);
}

/* Per-card accent on the value */
.gradient-purple .metric-value { color: var(--accent-green); }
.gradient-green  .metric-value { color: var(--accent-green); }
.gradient-orange .metric-value { color: var(--accent-amber); }
.gradient-red    .metric-value { color: var(--accent-red);   }

/* ─── Log Container ─────────────────────────────────────────────── */
.log-container {
    background: var(--surface-dark);
    color: hsl(40 25% 88%);
    padding: 20px;
    max-height: 400px;
    overflow-y: auto;
    font-family: 'Courier New', Menlo, Monaco, monospace;
    font-size: 0.85rem;
    line-height: 1.6;
}

.log-entry {
    margin-bottom: 4px;
    padding: 4px 0 4px 12px;
    border-left: 2px solid transparent;
}

.log-success {
    color: #4ade80;
    border-left-color: #4ade80;
}

.log-warning {
    color: #fbbf24;
    border-left-color: #fbbf24;
}

.log-error {
    color: #f87171;
    border-left-color: #f87171;
}

.log-info {
    color: hsl(40 25% 80%);
    border-left-color: hsl(30 15% 35%);
}

/* ─── Checkbox Group ────────────────────────────────────────────── */
.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin: 16px 0;
}

.checkbox-group label {
    display: flex;
    align-items: center;
    padding: 10px 12px;
    background: var(--surface-base);
    border: 1px solid var(--border-subtle);
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-default);
    transition: background 0.2s ease;
}

.checkbox-group label:hover {
    background: var(--surface-muted);
    border-color: var(--border-soft);
}

.checkbox-group input[type="checkbox"] {
    margin-right: 10px;
    width: 16px;
    height: 16px;
    cursor: pointer;
    accent-color: var(--accent-green);
}

/* ─── Table ─────────────────────────────────────────────────────── */
.table-container {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    margin-top: 12px;
}

thead {
    border-bottom: 2px solid var(--border-default);
}

thead th {
    padding: 10px 12px;
    text-align: left;
    font-family: var(--font-primary);
    font-size: 0.65rem;
    font-weight: 600;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    color: var(--text-muted);
    background: transparent;
}

td {
    padding: 12px;
    border-bottom: 1px solid var(--border-subtle);
    font-size: 0.9rem;
    color: var(--text-default);
}

tbody tr:hover {
    background: var(--surface-muted);
}

/* ─── Help Text ─────────────────────────────────────────────────── */
.help-text {
    color: var(--text-subtle);
    font-size: 0.875rem;
    margin: 8px 0;
}

/* ─── Spinner ───────────────────────────────────────────────────── */
.spinner {
    display: inline-block;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.35);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.8s ease-in-out infinite;
}

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

/* ─── Route Details ─────────────────────────────────────────────── */
#route-details {
    max-height: 400px;
    overflow-y: auto;
}

.route-step {
    padding: 10px 12px;
    margin-bottom: 6px;
    background: var(--surface-base);
    border: 1px solid var(--border-subtle);
    border-left: 3px solid var(--accent-green);
}

.route-step.late {
    border-left-color: var(--accent-red);
    background: var(--accent-red-light);
}

.step-number {
    font-weight: 600;
    font-size: 0.9rem;
    color: var(--accent-green);
}

.step-time {
    color: var(--text-subtle);
    font-size: 0.85rem;
}

/* ─── Responsive ────────────────────────────────────────────────── */
@media (max-width: 768px) {
    .main-content {
        padding: 20px 16px;
    }

    .header-inner {
        padding: 12px 16px;
    }

    .header-tagline {
        display: none;
    }

    .tab-button {
        padding: 10px 12px;
    }

    .grid-2,
    .grid-4 {
        grid-template-columns: 1fr;
    }

    canvas {
        width: 100% !important;
        height: auto !important;
    }

    .metric-value {
        font-size: 2rem;
    }

    .btn-large {
        padding: 14px 32px;
    }
}

@media (max-width: 480px) {
    .brand-name {
        font-size: 1.1rem;
    }

    .card {
        padding: 16px;
    }
}

/* ─── Leaflet Map Styles ────────────────────────────────────────── */
#network-map, #route-map {
    height: 600px;
    width: 100%;
    border: 1px solid var(--border-default);
    z-index: 1;
}

#route-map {
    height: 450px;
    min-height: 450px;
}

/* Ensure map is visible in results tab */
#results-tab #route-map {
    display: block !important;
}

#network-map:hover, #route-map:hover {
    border-color: var(--accent-green);
}

/* Hide Leaflet Routing Machine instruction panel */
.leaflet-routing-container {
    display: none !important;
}

/* ─── Loading Overlay ───────────────────────────────────────────── */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: hsl(30 10% 15% / 0.65);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    backdrop-filter: blur(4px);
    -webkit-backdrop-filter: blur(4px);
}

.loading-popup {
    background: var(--surface-base);
    padding: 40px;
    text-align: center;
    box-shadow: 0 24px 64px -12px hsl(30 10% 15% / 0.3);
    max-width: 360px;
    width: 90%;
}

.loading-popup h3 {
    margin: 20px 0 10px;
    color: var(--text-default);
    font-size: 1.4rem;
}

.loading-popup p {
    color: var(--text-muted);
    font-size: 0.9rem;
}

.spinner-large {
    display: inline-block;
    width: 48px;
    height: 48px;
    border: 4px solid hsl(140 60% 40% / 0.25);
    border-radius: 50%;
    border-top-color: var(--accent-green);
    animation: spin 0.8s ease-in-out infinite;
}

/* ─── Site Footer ───────────────────────────────────────────────── */
.site-footer {
    border-top: 1px solid var(--border-soft);
    background: var(--text-default);
    margin-top: auto;
}

.footer-inner {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 20px 32px;
}

.footer-brand {
    font-family: var(--font-primary);
    font-size: 1.1rem;
    color: hsl(40 33% 97% / 0.85);
}

.footer-copy {
    font-size: 0.72rem;
    color: hsl(40 33% 97% / 0.52);
}

@media (max-width: 768px) {
    .footer-inner {
        padding: 16px;
        flex-direction: column;
        gap: 6px;
        text-align: center;
    }
}