/* ============================================================
   CNG Availability Tracker — Global Stylesheet
   Palette: Deep Purple (#4C1D95) + Pearl Gold (#D4A843)
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* ── CSS variables ─────────────────────────────────────────── */
:root {
    --clr-purple-900: #2E1065;
    --clr-purple-800: #3B1286;
    --clr-purple-700: #4C1D95;   /* primary */
    --clr-purple-600: #6D28D9;
    --clr-purple-100: #EDE9FE;
    --clr-purple-50:  #F5F3FF;

    --clr-gold-600:   #B7891F;
    --clr-gold-500:   #D4A843;   /* secondary / pearl-gold */
    --clr-gold-400:   #EBBE62;
    --clr-gold-100:   #FDF6E3;

    --clr-green-500:  #10B981;
    --clr-green-100:  #D1FAE5;
    --clr-red-500:    #EF4444;
    --clr-red-100:    #FEE2E2;

    --clr-gray-900:   #111827;
    --clr-gray-700:   #374151;
    --clr-gray-500:   #6B7280;
    --clr-gray-200:   #E5E7EB;
    --clr-gray-100:   #F9FAFB;
    --clr-white:      #FFFFFF;

    --shadow-sm:  0 1px 3px rgba(0,0,0,.08), 0 1px 2px rgba(0,0,0,.06);
    --shadow-md:  0 4px 12px rgba(76,29,149,.12);
    --shadow-lg:  0 10px 30px rgba(76,29,149,.18);
    --radius-md:  0.75rem;
    --radius-lg:  1rem;
    --transition: all 0.2s ease;
}

/* ── Base ───────────────────────────────────────────────────── */
html {
    font-size: 16px;
    position: relative;
    min-height: 100%;
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    color: var(--clr-gray-900);
    background: var(--clr-gray-100);
    margin-bottom: 80px;
    line-height: 1.6;
}

/* ── Navbar ─────────────────────────────────────────────────── */
.navbar-cng {
    background: linear-gradient(135deg, var(--clr-purple-900) 0%, var(--clr-purple-700) 100%);
    box-shadow: 0 2px 16px rgba(0,0,0,.25);
    padding: 0.75rem 0;
}

.navbar-cng .navbar-brand {
    color: var(--clr-white) !important;
    font-weight: 700;
    font-size: 1.15rem;
    letter-spacing: -0.02em;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.navbar-cng .navbar-brand .brand-dot {
    width: 8px;
    height: 8px;
    background: var(--clr-gold-500);
    border-radius: 50%;
    display: inline-block;
    animation: pulse-dot 2.5s ease-in-out infinite;
}

@keyframes pulse-dot {
    0%, 100% { opacity: 1; transform: scale(1); }
    50%       { opacity: 0.6; transform: scale(0.8); }
}

.navbar-cng .nav-link {
    color: rgba(255,255,255,.8) !important;
    font-weight: 500;
    font-size: 0.9rem;
    padding: 0.5rem 0.85rem !important;
    border-radius: 0.5rem;
    transition: var(--transition);
}

.navbar-cng .nav-link:hover,
.navbar-cng .nav-link.active {
    color: var(--clr-white) !important;
    background: rgba(255,255,255,.12);
}

.navbar-cng .nav-link.stations-link {
    background: rgba(212,168,67,.15);
    color: var(--clr-gold-400) !important;
    border: 1px solid rgba(212,168,67,.3);
}

.navbar-cng .nav-link.stations-link:hover {
    background: rgba(212,168,67,.28);
    color: var(--clr-gold-400) !important;
}

.navbar-toggler {
    border-color: rgba(255,255,255,.3);
}
.navbar-toggler-icon {
    filter: invert(1);
}

/* ── Buttons ─────────────────────────────────────────────────── */
.btn-purple {
    background: var(--clr-purple-700);
    border-color: var(--clr-purple-700);
    color: var(--clr-white);
    font-weight: 600;
    border-radius: 0.5rem;
    transition: var(--transition);
}
.btn-purple:hover {
    background: var(--clr-purple-600);
    border-color: var(--clr-purple-600);
    color: var(--clr-white);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.btn-gold {
    background: var(--clr-gold-500);
    border-color: var(--clr-gold-500);
    color: var(--clr-gray-900);
    font-weight: 600;
    border-radius: 0.5rem;
    transition: var(--transition);
}
.btn-gold:hover {
    background: var(--clr-gold-600);
    border-color: var(--clr-gold-600);
    color: var(--clr-gray-900);
    box-shadow: var(--shadow-md);
    transform: translateY(-1px);
}

.btn:focus, .btn:active:focus,
.btn-link.nav-link:focus,
.form-control:focus,
.form-check-input:focus {
    box-shadow: 0 0 0 3px rgba(76,29,149,.2);
}

/* ── Station Cards ───────────────────────────────────────────── */
.station-card {
    background: var(--clr-white);
    border: 1px solid var(--clr-gray-200);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    overflow: hidden;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.station-card:hover {
    box-shadow: var(--shadow-lg);
    transform: translateY(-3px);
    border-color: var(--clr-purple-600);
}

.station-card-header {
    padding: 1.25rem 1.25rem 0;
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.75rem;
}

.station-card-body {
    padding: 0.75rem 1.25rem 1.25rem;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
}

.station-name {
    font-size: 1rem;
    font-weight: 700;
    color: var(--clr-gray-900);
    line-height: 1.3;
    margin: 0;
}

/* ── Availability Badges ─────────────────────────────────────── */
.badge-available {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    background: var(--clr-green-100);
    color: #065F46;
    font-size: 0.72rem;
    font-weight: 600;
    padding: 0.3rem 0.65rem;
    border-radius: 999px;
    white-space: nowrap;
    flex-shrink: 0;
}

.badge-unavailable {
    display: inline-flex;
    align-items: center;
    gap: 0.35rem;
    background: var(--clr-red-100);
    color: #991B1B;
    font-size: 0.72rem;
    font-weight: 600;
    padding: 0.3rem 0.65rem;
    border-radius: 999px;
    white-space: nowrap;
    flex-shrink: 0;
}

.badge-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    display: inline-block;
}
.badge-available .badge-dot { background: var(--clr-green-500); }
.badge-unavailable .badge-dot { background: var(--clr-red-500); }

/* ── Station Meta ────────────────────────────────────────────── */
.station-meta {
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
    margin-top: 0.75rem;
}

.station-meta-item {
    display: flex;
    align-items: center;
    gap: 0.45rem;
    font-size: 0.8rem;
    color: var(--clr-gray-500);
}

.station-meta-item svg {
    flex-shrink: 0;
    color: var(--clr-purple-600);
    opacity: 0.7;
}

/* ── Page Hero ───────────────────────────────────────────────── */
.page-hero {
    background: linear-gradient(135deg, var(--clr-purple-900) 0%, var(--clr-purple-700) 100%);
    color: var(--clr-white);
    padding: 2.5rem 0 3rem;
    margin-bottom: 0;
}

.page-hero h1 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 0.4rem;
    letter-spacing: -0.03em;
}

.page-hero p {
    color: rgba(255,255,255,.75);
    margin: 0;
    font-size: 0.95rem;
}

/* ── Stat Pills ──────────────────────────────────────────────── */
.stat-pill {
    display: inline-flex;
    flex-direction: column;
    align-items: center;
    background: rgba(255,255,255,.1);
    border: 1px solid rgba(255,255,255,.15);
    border-radius: var(--radius-md);
    padding: 0.85rem 1.5rem;
    min-width: 90px;
    backdrop-filter: blur(4px);
}

.stat-pill .stat-value {
    font-size: 1.8rem;
    font-weight: 700;
    line-height: 1;
    color: var(--clr-gold-400);
}

.stat-pill .stat-label {
    font-size: 0.72rem;
    color: rgba(255,255,255,.7);
    margin-top: 0.25rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* ── Filter Bar ──────────────────────────────────────────────── */
.filter-bar {
    background: var(--clr-white);
    border-bottom: 1px solid var(--clr-gray-200);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow-sm);
}

.filter-search {
    position: relative;
}

.filter-search input {
    border: 1.5px solid var(--clr-gray-200);
    border-radius: 0.6rem;
    padding: 0.55rem 1rem 0.55rem 2.5rem;
    font-size: 0.875rem;
    width: 100%;
    transition: var(--transition);
    background: var(--clr-gray-100);
}

.filter-search input:focus {
    border-color: var(--clr-purple-700);
    background: var(--clr-white);
    outline: none;
    box-shadow: 0 0 0 3px rgba(76,29,149,.12);
}

.filter-search .search-icon {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--clr-gray-500);
    pointer-events: none;
}

.filter-toggle-group {
    display: flex;
    gap: 0.4rem;
}

.filter-toggle {
    padding: 0.45rem 1rem;
    border: 1.5px solid var(--clr-gray-200);
    border-radius: 999px;
    font-size: 0.8rem;
    font-weight: 600;
    cursor: pointer;
    background: var(--clr-white);
    color: var(--clr-gray-500);
    transition: var(--transition);
    user-select: none;
}

.filter-toggle:hover {
    border-color: var(--clr-purple-600);
    color: var(--clr-purple-700);
}

.filter-toggle.active-all {
    background: var(--clr-purple-700);
    border-color: var(--clr-purple-700);
    color: var(--clr-white);
}

.filter-toggle.active-available {
    background: var(--clr-green-100);
    border-color: var(--clr-green-500);
    color: #065F46;
}

.filter-toggle.active-unavailable {
    background: var(--clr-red-100);
    border-color: var(--clr-red-500);
    color: #991B1B;
}

.results-count {
    font-size: 0.8rem;
    color: var(--clr-gray-500);
    font-weight: 500;
    white-space: nowrap;
}

/* ── Grid ────────────────────────────────────────────────────── */
.stations-grid {
    padding: 1.75rem 0 2rem;
}

/* ── Empty State ─────────────────────────────────────────────── */
.empty-state {
    text-align: center;
    padding: 4rem 1rem;
    color: var(--clr-gray-500);
}

.empty-state svg {
    width: 56px;
    height: 56px;
    color: var(--clr-purple-100);
    margin-bottom: 1rem;
}

.empty-state h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--clr-gray-700);
    margin-bottom: 0.35rem;
}

.empty-state p {
    font-size: 0.875rem;
}

/* ── Home Hero ───────────────────────────────────────────────── */
.home-hero {
    background: linear-gradient(135deg, var(--clr-purple-900) 0%, var(--clr-purple-700) 60%, var(--clr-purple-600) 100%);
    color: var(--clr-white);
    padding: 5rem 0 4rem;
    position: relative;
    overflow: hidden;
}

.home-hero::after {
    content: '';
    position: absolute;
    bottom: -1px;
    left: 0;
    right: 0;
    height: 50px;
    background: var(--clr-gray-100);
    clip-path: ellipse(55% 100% at 50% 100%);
}

.home-hero h1 {
    font-size: 2.6rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    line-height: 1.1;
}

.home-hero .accent {
    color: var(--clr-gold-400);
}

.home-hero p.lead {
    font-size: 1.1rem;
    color: rgba(255,255,255,.8);
    max-width: 480px;
}

/* ── Feature Cards (Home) ────────────────────────────────────── */
.feature-card {
    background: var(--clr-white);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    box-shadow: var(--shadow-sm);
    border: 1px solid var(--clr-gray-200);
    height: 100%;
    transition: var(--transition);
}

.feature-card:hover {
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.feature-icon {
    width: 48px;
    height: 48px;
    background: var(--clr-purple-100);
    border-radius: 0.75rem;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
    color: var(--clr-purple-700);
}

/* ── Footer ─────────────────────────────────────────────────── */
.footer {
    position: absolute;
    bottom: 0;
    width: 100%;
    background: var(--clr-gray-900);
    color: rgba(255,255,255,.6);
    padding: 1.25rem 0;
    font-size: 0.82rem;
}

.footer a {
    color: var(--clr-gold-400);
    text-decoration: none;
}

.footer a:hover {
    color: var(--clr-gold-500);
    text-decoration: underline;
}

/* ── Utilities ───────────────────────────────────────────────── */
.text-purple { color: var(--clr-purple-700) !important; }
.bg-purple-soft { background: var(--clr-purple-50) !important; }

/* ── Footer: use relative so it doesn't overlap page content ─── */
.footer {
    position: relative;
}

/* ── Responsive tweaks ───────────────────────────────────────── */
@media (max-width: 576px) {
    .home-hero { padding: 3rem 0 2.5rem; }
    .home-hero h1 { font-size: 1.75rem; }
    .home-hero p.lead { font-size: .95rem; }

    .stat-pill { padding: 0.65rem 1rem; min-width: 72px; }
    .stat-pill .stat-value { font-size: 1.4rem; }

    /* Filter bar stacks vertically */
    .filter-bar .row > [class*="col-"] { margin-bottom: .5rem; }
    .filter-toggle-group { flex-wrap: wrap; gap: .3rem; }
    .filter-toggle { font-size: .75rem; padding: .35rem .75rem; }

    /* Station cards full-width */
    .stations-grid .col-md-6,
    .stations-grid .col-lg-4 { padding-left: .75rem; padding-right: .75rem; }

    /* Feature cards */
    .feature-card { padding: 1.25rem; }
}