:root {
    --pp-green: #22c55e;
    --pp-green-dark: #16a34a;
    --pp-blue: #2563eb;
    --pp-blue-light: #38bdf8;
    --pp-teal: #06b6d4;
    --pp-bg: #f8fafc;
    --pp-surface: #ffffff;
    --pp-text-primary: #0f172a;
    --pp-text-secondary: #475569;
    --pp-border: #e2e8f0;
    --pp-gradient-main: linear-gradient(135deg, #22c55e 0%, #06b6d4 50%, #2563eb 100%);
    --pp-shadow-soft: 0 4px 20px rgba(15, 23, 42, 0.08);
    --pp-shadow-strong: 0 18px 50px rgba(37, 99, 235, 0.15);
    --pp-map-surface: #dbe4ee;
    --pp-map-overlay: linear-gradient(to left, rgba(255, 255, 255, 0.7) 0%, rgba(255, 255, 255, 0) 30%), linear-gradient(to right, rgba(255, 255, 255, 0.4) 0%, rgba(255, 255, 255, 0) 20%);
}

@media (prefers-color-scheme: dark) {
    :root {
        --pp-bg: #0b1220;
        --pp-surface: #111827;
        --pp-text-primary: #f3f4f6;
        --pp-text-secondary: #cbd5e1;
        --pp-border: #263246;
        --pp-shadow-soft: 0 8px 30px rgba(2, 6, 23, 0.55);
        --pp-shadow-strong: 0 20px 60px rgba(6, 182, 212, 0.18);
        --pp-map-surface: #152033;
        --pp-map-overlay: linear-gradient(to left, rgba(15, 23, 42, 0.35) 0%, rgba(15, 23, 42, 0) 30%), linear-gradient(to right, rgba(15, 23, 42, 0.25) 0%, rgba(15, 23, 42, 0) 20%);
    }
}

* {
    box-sizing: border-box;
}

body {
    font-family: "Inter", system-ui, -apple-system, "Segoe UI", sans-serif;
    color: var(--pp-text-primary);
    background: radial-gradient(circle at 5% -10%, rgba(56, 189, 248, 0.22), transparent 34%),
        radial-gradient(circle at 100% 0%, rgba(34, 197, 94, 0.18), transparent 40%),
        var(--pp-bg);
    padding-top: 74px;
    min-height: 100vh;
}

h1,
h2,
h3,
h4,
h5,
h6,
label,
.form-label,
.card-title,
.card-text,
.modal-title,
.table,
.list-group-item,
.dropdown-item,
.navbar-brand,
.btn,
.alert,
.text-body,
.text-body-emphasis {
    color: var(--pp-text-primary);
}

p,
span,
div,
li,
td,
th,
small,
.form-text,
.text-muted,
.text-secondary {
    color: inherit;
}

.text-muted,
.form-text,
small.text-muted,
p.text-muted,
span.text-muted,
div.text-muted {
    color: var(--pp-text-secondary) !important;
}

a {
    color: var(--pp-blue);
}

a:hover {
    color: var(--pp-teal);
}

.app-main {
    padding-bottom: 24px;
}

.app-navbar {
    border-bottom: 1px solid rgba(255, 255, 255, 0.14);
    background: linear-gradient(100deg, rgba(15, 23, 42, 0.95) 0%, rgba(15, 23, 42, 0.84) 48%, rgba(37, 99, 235, 0.83) 100%);
    backdrop-filter: blur(10px);
}

.app-brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-weight: 700;
    letter-spacing: 0.02em;
}

.app-brand-logo {
    width: 34px;
    height: 34px;
    object-fit: contain;
    border-radius: 9px;
    box-shadow: 0 6px 16px rgba(0, 0, 0, 0.25);
}

.navbar-dark .navbar-nav .nav-link,
.navbar-dark .navbar-text {
    color: rgba(248, 250, 252, 0.9);
}

.navbar-dark .navbar-nav .nav-link:hover {
    color: #ffffff;
}

.card {
    background: var(--pp-surface);
    border: 1px solid var(--pp-border);
    border-radius: 16px;
    box-shadow: var(--pp-shadow-soft);
    color: var(--pp-text-primary);
}

.card-header,
.card-body,
.card-footer,
.table-responsive,
.input-group-text,
.modal-content,
.modal-header,
.modal-footer,
.offcanvas,
.popover,
.tooltip-inner {
    background-color: var(--pp-surface);
    color: var(--pp-text-primary);
    border-color: var(--pp-border);
}

.btn {
    border-radius: 12px;
    font-weight: 600;
    transition: transform 0.15s ease, box-shadow 0.15s ease, filter 0.15s ease;
}

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

.btn-primary,
.btn-success {
    background: var(--pp-gradient-main);
    border-color: transparent;
    box-shadow: 0 10px 24px rgba(37, 99, 235, 0.24);
}

.btn-primary:hover,
.btn-success:hover,
.btn-primary:focus,
.btn-success:focus {
    filter: brightness(1.05);
    border-color: transparent;
}

.btn-outline-primary {
    color: var(--pp-blue);
    border-color: color-mix(in srgb, var(--pp-blue) 60%, transparent);
}

.btn-outline-primary:hover {
    color: #ffffff;
    background: linear-gradient(135deg, var(--pp-blue-light), var(--pp-blue));
    border-color: transparent;
}

.btn-secondary {
    background: color-mix(in srgb, var(--pp-surface) 75%, var(--pp-text-primary) 25%);
    border-color: var(--pp-border);
    color: var(--pp-text-primary);
}

.btn-secondary:hover,
.btn-secondary:focus {
    background: color-mix(in srgb, var(--pp-surface) 55%, var(--pp-text-primary) 45%);
    border-color: var(--pp-border);
    color: var(--pp-text-primary);
}

.btn-outline-secondary {
    color: var(--pp-text-secondary);
    border-color: var(--pp-border);
}

.btn-outline-secondary:hover,
.btn-outline-secondary:focus {
    background: color-mix(in srgb, var(--pp-surface) 55%, var(--pp-text-primary) 18%);
    color: var(--pp-text-primary);
    border-color: var(--pp-border);
}

.btn-info,
.btn-warning {
    color: #0f172a;
}

.form-control,
.form-select {
    border-radius: 12px;
    border: 1px solid var(--pp-border);
    background-color: var(--pp-surface);
    color: var(--pp-text-primary);
}

.form-control:focus,
.form-select:focus {
    border-color: color-mix(in srgb, var(--pp-teal) 60%, white);
    box-shadow: 0 0 0 0.2rem rgba(6, 182, 212, 0.18);
}

.form-control::placeholder,
textarea::placeholder,
input::placeholder {
    color: color-mix(in srgb, var(--pp-text-secondary) 80%, transparent);
}

.form-check-input {
    background-color: color-mix(in srgb, var(--pp-surface) 80%, black 20%);
    border-color: var(--pp-border);
}

.form-check-input:checked {
    background-color: var(--pp-blue);
    border-color: var(--pp-blue);
}

.list-group-item {
    background-color: transparent;
    border-color: var(--pp-border);
    color: var(--pp-text-primary);
}

.alert {
    border-radius: 14px;
    border: 1px solid var(--pp-border);
}

.badge.bg-primary {
    background: linear-gradient(135deg, var(--pp-blue-light), var(--pp-blue)) !important;
}

.badge.bg-success {
    background: linear-gradient(135deg, var(--pp-green), var(--pp-teal)) !important;
}

.badge.bg-secondary {
    background: color-mix(in srgb, var(--pp-surface) 60%, var(--pp-text-secondary) 40%) !important;
}

.badge.bg-light,
.badge.bg-info,
.badge.bg-warning,
.bg-light,
.bg-info,
.bg-warning {
    color: #0f172a !important;
}

.text-dark {
    color: var(--pp-text-primary) !important;
}

.table {
    --bs-table-bg: transparent;
    --bs-table-color: var(--pp-text-primary);
    --bs-table-striped-bg: rgba(148, 163, 184, 0.08);
    --bs-table-border-color: var(--pp-border);
}

.table thead th,
.table tbody td,
.table tbody th {
    color: var(--pp-text-primary);
    border-color: var(--pp-border);
}

.leaflet-container,
#tripMap,
#map {
    border-radius: 14px;
    border: 1px solid var(--pp-border);
    box-shadow: var(--pp-shadow-soft);
    background: var(--pp-map-surface) !important;
}

#googleRoutePreview,
iframe[src*="google.com/maps"],
iframe[src*="google.com"] {
    border-color: var(--pp-border) !important;
    background: var(--pp-map-surface) !important;
}

.hero-brand {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 10px;
}

.hero-brand img {
    width: 46px;
    height: 46px;
    object-fit: contain;
    border-radius: 12px;
}

.hero-title {
    font-weight: 700;
    letter-spacing: 0.01em;
}

.hero-highlight {
    background: var(--pp-gradient-main);
    -webkit-background-clip: text;
    background-clip: text;
    color: transparent;
}

.surface-glow {
    background: linear-gradient(160deg, rgba(255, 255, 255, 0.75), rgba(255, 255, 255, 0.45));
    box-shadow: var(--pp-shadow-strong);
}

.sidebar {
    background-color: var(--pp-surface) !important;
    color: var(--pp-text-primary);
}

.hex-subtitle,
.hex-meta {
    color: var(--pp-text-secondary) !important;
}

@media (prefers-color-scheme: dark) {
    .surface-glow {
        background: linear-gradient(160deg, rgba(17, 24, 39, 0.92), rgba(17, 24, 39, 0.78));
    }

    .leaflet-tile-pane {
        filter: brightness(0.7) invert(1) contrast(0.92) saturate(0.85) hue-rotate(180deg);
    }

    .leaflet-control-zoom a,
    .leaflet-popup-content-wrapper,
    .leaflet-popup-tip {
        background: var(--pp-surface);
        color: var(--pp-text-primary);
        border-color: var(--pp-border);
    }

    #googleRoutePreview,
    iframe[src*="google.com/maps"],
    iframe[src*="google.com"] {
        filter: invert(0.9) hue-rotate(180deg) saturate(0.8) brightness(0.88) contrast(0.95);
    }

    .alert {
        color: var(--pp-surface);
    }
}

@media (max-width: 768px) {
    body {
        padding-top: 70px;
    }

    .app-brand-logo {
        width: 30px;
        height: 30px;
    }
}

/* ===== Rich Editor Component ===== */
.rich-editor-wrap { border: 1px solid var(--bs-border-color, #dee2e6); border-radius: 6px; overflow: hidden; }
.rich-editor-toolbar { border-bottom: 1px solid var(--bs-border-color, #dee2e6); }
.rich-editor-body[data-placeholder].re-empty::before {
    content: attr(data-placeholder);
    color: #adb5bd;
    pointer-events: none;
}
.rich-editor-body a { color: #0d6efd; text-decoration: underline; }
.rich-editor-body ul, .rich-editor-body ol { padding-left: 1.25rem; margin: 0.2rem 0; }
.rich-editor-body li { margin: 0.1rem 0; }