/* =========================================================
   SpaceWatch Dashboard — Main Stylesheet
   ========================================================= */

/* ---- Fonts & Variables ---------------------------------- */
:root {
    --bg-deep:     #05060f;
    --bg-base:     #0c0d1a;
    --bg-surface:  #12132a;
    --bg-card:     #181932;
    --bg-card-alt: #1e2040;
    --border:      rgba(99, 120, 255, 0.18);
    --border-glow: rgba(99, 180, 255, 0.35);

    --accent:      #4fc3f7;
    --accent-dim:  #29b6f6;
    --accent-dark: #0277bd;
    --purple:      #7c4dff;
    --green:       #4caf50;
    --orange:      #ff9800;
    --red:         #ef5350;

    --text-primary:   #e8ecf4;
    --text-secondary: #8891b0;
    --text-muted:     #5a6285;

    --radius-sm:  8px;
    --radius-md:  14px;
    --radius-lg:  20px;
    --radius-xl:  28px;

    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.45);
    --shadow-glow: 0 0 30px rgba(79, 195, 247, 0.12);
    --transition:  0.25s ease;
}

/* ---- Base Reset ----------------------------------------- */
*, *::before, *::after { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: 'Inter', system-ui, -apple-system, sans-serif;
    font-size: 15px;
    line-height: 1.65;
    min-height: 100vh;
    overflow-x: hidden;
}

/* ---- Starfield Background ------------------------------- */
.stars-container {
    position: fixed;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    overflow: hidden;
}
.stars, .stars2, .stars3 {
    position: absolute;
    inset: 0;
    background-repeat: repeat;
    animation: starsMove linear infinite;
}
.stars {
    background-image:
        radial-gradient(1px 1px at 10%  20%, rgba(255,255,255,.7), transparent),
        radial-gradient(1px 1px at 30%  65%, rgba(255,255,255,.5), transparent),
        radial-gradient(1px 1px at 55%  10%, rgba(255,255,255,.6), transparent),
        radial-gradient(1px 1px at 72%  45%, rgba(255,255,255,.4), transparent),
        radial-gradient(1px 1px at 88%  80%, rgba(255,255,255,.7), transparent),
        radial-gradient(1px 1px at 15%  90%, rgba(255,255,255,.3), transparent),
        radial-gradient(1px 1px at 42%  35%, rgba(255,255,255,.5), transparent),
        radial-gradient(1px 1px at 65%  70%, rgba(255,255,255,.6), transparent);
    background-size: 300px 300px;
    opacity: 0.5;
    animation-duration: 150s;
}
.stars2 {
    background-image:
        radial-gradient(1.5px 1.5px at 25% 15%, rgba(79,195,247,.6), transparent),
        radial-gradient(1.5px 1.5px at 60%  50%, rgba(124,77,255,.5), transparent),
        radial-gradient(1px   1px   at 80%  25%, rgba(255,255,255,.5), transparent),
        radial-gradient(1px   1px   at 5%   75%, rgba(255,255,255,.4), transparent);
    background-size: 500px 500px;
    opacity: 0.35;
    animation-duration: 200s;
    animation-direction: reverse;
}
.stars3 {
    background-image:
        radial-gradient(2px 2px at 40% 30%, rgba(79,195,247,.4), transparent),
        radial-gradient(2px 2px at 75% 65%, rgba(255,152,0,.3), transparent);
    background-size: 700px 700px;
    opacity: 0.2;
    animation-duration: 300s;
}
@keyframes starsMove {
    from { transform: translateY(0); }
    to   { transform: translateY(-300px); }
}

/* ---- All content sits above the star background --------- */
.navbar, .main-content, .site-footer,
.toast-container, .container { position: relative; z-index: 1; }

/* ---- Navigation ----------------------------------------- */
#mainNav {
    background: rgba(5, 6, 15, 0.7);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-bottom: 1px solid var(--border);
    padding: 0.75rem 0;
    transition: background var(--transition), box-shadow var(--transition);
}
#mainNav.scrolled {
    background: rgba(5, 6, 15, 0.92);
    box-shadow: 0 2px 32px rgba(0,0,0,0.5);
}

.navbar-brand {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--accent) !important;
    text-decoration: none;
    letter-spacing: 0.3px;
}
.brand-icon {
    display: grid;
    place-items: center;
    width: 36px; height: 36px;
    background: rgba(79, 195, 247, 0.12);
    border: 1px solid rgba(79, 195, 247, 0.3);
    border-radius: 10px;
    font-size: 1rem;
}
.brand-text { color: var(--text-primary); }

.nav-pill {
    color: var(--text-secondary) !important;
    font-weight: 500;
    font-size: 0.9rem;
    padding: 0.45rem 1rem !important;
    border-radius: 999px !important;
    transition: all var(--transition);
    border: 1px solid transparent;
}
.nav-pill:hover {
    color: var(--accent) !important;
    background: rgba(79, 195, 247, 0.08);
    border-color: rgba(79, 195, 247, 0.2);
}
.nav-pill.active {
    color: var(--accent) !important;
    background: rgba(79, 195, 247, 0.12);
    border-color: rgba(79, 195, 247, 0.3);
}
.nav-pill i { margin-right: 0.4rem; }

/* ---- Cards ---------------------------------------------- */
.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-card);
    overflow: hidden;
    transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition);
}
.card:hover {
    transform: translateY(-3px);
    box-shadow: var(--shadow-card), var(--shadow-glow);
    border-color: var(--border-glow);
}

.card-header {
    background: linear-gradient(135deg, rgba(79,195,247,0.08), rgba(124,77,255,0.04));
    border-bottom: 1px solid var(--border);
    padding: 1rem 1.4rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.card-header h5, .card-header h4, .card-header h3, .card-header h2 {
    margin: 0;
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-primary);
}
.card-header i { color: var(--accent); font-size: 0.9rem; }

.card-body { padding: 1.4rem; }

/* ---- Hero Sections -------------------------------------- */
.page-hero {
    background: linear-gradient(135deg, rgba(79,195,247,0.06) 0%, rgba(124,77,255,0.04) 100%);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 2.5rem 2rem;
    margin-bottom: 2rem;
    position: relative;
    overflow: hidden;
}
.page-hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse at 80% 20%, rgba(79,195,247,0.07), transparent 60%),
        radial-gradient(ellipse at 20% 80%, rgba(124,77,255,0.06), transparent 60%);
    pointer-events: none;
}
.page-hero .hero-icon {
    font-size: 3rem;
    color: var(--accent);
    opacity: 0.85;
    margin-bottom: 0.75rem;
    display: block;
    filter: drop-shadow(0 0 12px rgba(79,195,247,0.4));
}
.page-hero h1 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: clamp(1.6rem, 3vw, 2.2rem);
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}
.page-hero .lead {
    color: var(--text-secondary);
    font-size: 0.97rem;
    line-height: 1.7;
    max-width: 600px;
}
.hero-actions { margin-top: 1.5rem; display: flex; gap: 0.75rem; flex-wrap: wrap; }

/* ---- Stat Cards ----------------------------------------- */
.stat-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem 1.25rem;
    text-align: center;
    position: relative;
    overflow: hidden;
    transition: transform var(--transition), box-shadow var(--transition);
}
.stat-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
}
.stat-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-glow); }
.stat-card .stat-icon {
    font-size: 1.6rem;
    margin-bottom: 0.75rem;
    display: block;
}
.stat-card .stat-number {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2.4rem;
    font-weight: 800;
    color: var(--accent);
    line-height: 1;
    margin-bottom: 0.3rem;
}
.stat-card .stat-label {
    font-size: 0.78rem;
    font-weight: 600;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.8px;
}

/* ---- Buttons -------------------------------------------- */
.btn {
    font-weight: 600;
    font-size: 0.875rem;
    border-radius: var(--radius-sm);
    padding: 0.55rem 1.25rem;
    transition: all var(--transition);
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
}
.btn-primary {
    background: linear-gradient(135deg, var(--accent), var(--accent-dim));
    color: #05060f;
    box-shadow: 0 4px 16px rgba(79, 195, 247, 0.25);
}
.btn-primary:hover {
    background: linear-gradient(135deg, #fff, var(--accent));
    transform: translateY(-1px);
    box-shadow: 0 6px 24px rgba(79, 195, 247, 0.4);
    color: #05060f;
}
.btn-outline-primary {
    border: 1.5px solid var(--accent);
    color: var(--accent);
    background: transparent;
}
.btn-outline-primary:hover {
    background: rgba(79, 195, 247, 0.1);
    color: var(--accent);
    transform: translateY(-1px);
}
.btn-outline-secondary {
    border: 1.5px solid var(--border);
    color: var(--text-secondary);
    background: transparent;
}
.btn-outline-secondary:hover {
    background: rgba(255,255,255,0.05);
    color: var(--text-primary);
    border-color: rgba(255,255,255,0.2);
}
.btn-outline-info {
    border: 1.5px solid #26c6da;
    color: #26c6da;
    background: transparent;
}
.btn-outline-info:hover {
    background: rgba(38, 198, 218, 0.1);
    color: #26c6da;
}
.btn-sm { padding: 0.35rem 0.85rem; font-size: 0.8rem; }
.btn-lg { padding: 0.75rem 2rem; font-size: 1rem; border-radius: var(--radius-md); }

/* ---- Tables --------------------------------------------- */
.table {
    color: var(--text-primary);
    border-collapse: separate;
    border-spacing: 0;
}
.table thead th {
    background: rgba(79,195,247,0.06);
    color: var(--accent);
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.8px;
    padding: 0.85rem 1rem;
    border-bottom: 1px solid var(--border);
    white-space: nowrap;
}
.table tbody td {
    padding: 0.85rem 1rem;
    border-bottom: 1px solid rgba(99,120,255,0.08);
    color: var(--text-secondary);
    vertical-align: middle;
    font-size: 0.88rem;
}
.table tbody tr:last-child td { border-bottom: none; }
.table tbody tr:hover td {
    background: rgba(79,195,247,0.04);
    color: var(--text-primary);
}
.table-dark { background: transparent; }

/* ---- Badges --------------------------------------------- */
.badge {
    font-size: 0.72rem;
    font-weight: 700;
    padding: 0.3em 0.7em;
    border-radius: 6px;
    letter-spacing: 0.3px;
}
.badge.bg-danger   { background: rgba(239, 83, 80, 0.18) !important; color: #ef9a9a; border: 1px solid rgba(239,83,80,0.3); }
.badge.bg-warning  { background: rgba(255,152,0, 0.15) !important; color: #ffcc80; border: 1px solid rgba(255,152,0,0.3); }
.badge.bg-success  { background: rgba(76,175,80, 0.15) !important; color: #a5d6a7; border: 1px solid rgba(76,175,80,0.3); }
.badge.bg-info     { background: rgba(38,198,218,0.15) !important; color: #80deea; border: 1px solid rgba(38,198,218,0.3); }
.badge.bg-secondary{ background: rgba(144,164,174,0.15) !important; color: #b0bec5; border: 1px solid rgba(144,164,174,0.2); }

/* ---- Alert Banners -------------------------------------- */
.alert-banner {
    padding: 0.85rem 1.25rem;
    border-radius: var(--radius-md);
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
    font-weight: 500;
    border-left: 3px solid;
}
.alert-banner.alert-error,
.alert-banner.alert-danger {
    background: rgba(239,83,80,0.1);
    border-left-color: var(--red);
    color: #ef9a9a;
}
.alert-banner.alert-warning {
    background: rgba(255,152,0,0.1);
    border-left-color: var(--orange);
    color: #ffcc80;
}
.alert-banner.alert-success {
    background: rgba(76,175,80,0.1);
    border-left-color: var(--green);
    color: #a5d6a7;
}
.alert-banner.alert-info {
    background: rgba(79,195,247,0.1);
    border-left-color: var(--accent);
    color: var(--accent);
}
.btn-dismiss {
    background: none;
    border: none;
    color: inherit;
    opacity: 0.6;
    cursor: pointer;
    padding: 0.2rem 0.4rem;
    line-height: 1;
}
.btn-dismiss:hover { opacity: 1; }

/* ---- Empty / Error States ------------------------------- */
.empty-state {
    text-align: center;
    padding: 3rem 2rem;
    color: var(--text-muted);
}
.empty-state .empty-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
    opacity: 0.4;
    display: block;
}
.empty-state h4 { color: var(--text-secondary); font-size: 1.1rem; margin-bottom: 0.5rem; }
.empty-state p { font-size: 0.88rem; }

.error-state {
    text-align: center;
    padding: 3rem 2rem;
}
.error-state .error-icon {
    font-size: 3rem;
    color: var(--orange);
    margin-bottom: 1rem;
    display: block;
}
.error-state h3 { color: var(--text-primary); margin-bottom: 0.5rem; }
.error-state p { color: var(--text-secondary); font-size: 0.9rem; }

/* ---- Loading -------------------------------------------- */
.loading-overlay {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(5,6,15,0.8);
    backdrop-filter: blur(4px);
    z-index: 9000;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    color: var(--text-secondary);
}
.loading-ring {
    width: 56px; height: 56px;
    border: 3px solid rgba(79,195,247,0.15);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.9s linear infinite;
}
@keyframes spin { to { transform: rotate(360deg); } }

/* ---- Toast --------------------------------------------- */
.toast-info    { background: rgba(24,25,50,0.95); color: var(--accent); }
.toast-success { background: rgba(17,34,17,0.95); color: #a5d6a7; }
.toast-danger  { background: rgba(40,15,15,0.95); color: #ef9a9a; }
.toast-warning { background: rgba(36,27,5,0.95);  color: #ffcc80; }
.toast { border-radius: var(--radius-md); min-width: 260px; }

/* ---- Section Titles ------------------------------------- */
.section-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 1.25rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.section-title i { color: var(--accent); }
.section-title .pill-count {
    background: rgba(79,195,247,0.12);
    color: var(--accent);
    font-size: 0.72rem;
    padding: 0.2em 0.6em;
    border-radius: 999px;
    margin-left: auto;
}

/* ---- APOD Image ----------------------------------------- */
.apod-image-wrapper {
    position: relative;
    border-radius: var(--radius-md);
    overflow: hidden;
    background: var(--bg-surface);
}
.apod-image-wrapper img {
    width: 100%;
    max-height: 520px;
    object-fit: cover;
    display: block;
    border-radius: var(--radius-md);
    transition: transform 0.4s ease;
}
.apod-image-wrapper:hover img { transform: scale(1.01); }
.apod-date-tag {
    position: absolute;
    top: 1rem; right: 1rem;
    background: rgba(5,6,15,0.75);
    backdrop-filter: blur(8px);
    color: var(--accent);
    font-size: 0.78rem;
    font-weight: 600;
    padding: 0.3em 0.75em;
    border-radius: 999px;
    border: 1px solid rgba(79,195,247,0.3);
}
.apod-title-overlay {
    position: absolute;
    bottom: 0; left: 0; right: 0;
    background: linear-gradient(to top, rgba(5,6,15,0.9) 0%, transparent 100%);
    padding: 2rem 1.5rem 1.2rem;
}
.apod-title-overlay h2 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.4rem;
    font-weight: 700;
    color: #fff;
    margin: 0;
    text-shadow: 0 2px 8px rgba(0,0,0,0.5);
}

/* ---- Video embed --------------------------------------- */
.video-wrapper { border-radius: var(--radius-md); overflow: hidden; }

/* ---- Meta info list ------------------------------------ */
.meta-list { list-style: none; padding: 0; margin: 0; }
.meta-list li {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.6rem 0;
    border-bottom: 1px solid rgba(99,120,255,0.08);
    font-size: 0.875rem;
}
.meta-list li:last-child { border-bottom: none; }
.meta-list .meta-key { color: var(--text-muted); font-weight: 500; }
.meta-list .meta-val { color: var(--text-primary); font-weight: 600; }

/* ---- Explanation text ---------------------------------- */
.explanation-text {
    color: var(--text-secondary);
    font-size: 0.93rem;
    line-height: 1.8;
}

/* ---- Charts -------------------------------------------- */
.chart-box {
    min-height: 300px;
    position: relative;
}
.plotly-graph-div { border-radius: var(--radius-md); }

/* ---- Hazardous indicator ------------------------------- */
.hazard-dot {
    display: inline-block;
    width: 8px; height: 8px;
    border-radius: 50%;
    background: var(--red);
    box-shadow: 0 0 6px rgba(239,83,80,0.6);
    margin-right: 6px;
    vertical-align: middle;
}

/* ---- Footer -------------------------------------------- */
.site-footer {
    background: rgba(5,6,15,0.8);
    backdrop-filter: blur(20px);
    border-top: 1px solid var(--border);
    padding: 2.5rem 0;
    margin-top: 4rem;
    position: relative;
    z-index: 1;
}
.footer-inner {
    display: grid;
    grid-template-columns: 1fr auto 1fr;
    align-items: center;
    gap: 2rem;
}
.footer-brand .footer-logo {
    font-family: 'Space Grotesk', sans-serif;
    font-weight: 700;
    font-size: 1rem;
    color: var(--accent);
}
.footer-brand p {
    color: var(--text-muted);
    font-size: 0.8rem;
    margin: 0.3rem 0 0;
}
.footer-links {
    display: flex;
    gap: 1.5rem;
}
.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 500;
    transition: color var(--transition);
}
.footer-links a:hover { color: var(--accent); }
.footer-credit {
    text-align: right;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}
.footer-credit span { font-size: 0.82rem; color: var(--text-muted); }
.footer-credit a { color: var(--accent); text-decoration: none; }
.footer-credit small { color: var(--text-muted); font-size: 0.75rem; }

/* ---- Utilities ----------------------------------------- */
.text-accent   { color: var(--accent) !important; }
.text-muted    { color: var(--text-muted) !important; }
.text-secondary-custom { color: var(--text-secondary) !important; }

.divider {
    height: 1px;
    background: var(--border);
    margin: 1.5rem 0;
}

/* ---- Scrollbar ----------------------------------------- */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg-deep); }
::-webkit-scrollbar-thumb { background: rgba(79,195,247,0.3); border-radius: 3px; }
::-webkit-scrollbar-thumb:hover { background: rgba(79,195,247,0.5); }

/* ---- Responsive ---------------------------------------- */
@media (max-width: 992px) {
    .footer-inner {
        grid-template-columns: 1fr;
        text-align: center;
    }
    .footer-links { justify-content: center; }
    .footer-credit { text-align: center; }
}
@media (max-width: 768px) {
    .page-hero { padding: 1.75rem 1.25rem; }
    .page-hero h1 { font-size: 1.5rem; }
    .stat-card .stat-number { font-size: 1.8rem; }
    .card-body { padding: 1rem; }
}
@media (prefers-reduced-motion: reduce) {
    .stars, .stars2, .stars3 { animation: none; }
    .card:hover, .stat-card:hover { transform: none; }
}