/* =============================================
   TESLAQUAKE™ MASTER NAVIGATION v2.4
   Mobile-First Responsive Design
   Last Updated: February 7, 2026
   ============================================= */

:root {
    --header-height: 70px;
    --nav-bg: rgba(10, 10, 18, 0.98);
    --nav-border: rgba(0, 255, 255, 0.15);
    --cyan: #00e5ff;
    --cyan-glow: rgba(0, 229, 255, 0.3);
    --text: #ffffff;
    --text-secondary: #a0a0b0;
    --orange: #ff9500;
}

/* Skip Link */
.skip-link {
    position: absolute;
    top: -50px;
    left: 0;
    background: var(--cyan);
    color: #0a0a12;
    padding: 12px 24px;
    z-index: 10000;
    font-weight: 600;
    text-decoration: none;
    transition: top 0.3s;
}
.skip-link:focus { top: 0; }

/* Header Base */
header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: var(--nav-bg);
    border-bottom: 1px solid var(--nav-border);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    height: var(--header-height);
}

.header-inner {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

/* Logo */
.logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    text-decoration: none;
    flex-shrink: 0;
}
.logo img {
    width: 50px;
    height: 50px;
    border-radius: 50%;
}
.logo-text { display: flex; flex-direction: column; }
.logo-brand {
    font-family: 'Orbitron', sans-serif;
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--text);
    letter-spacing: 0.08em;
    line-height: 1.2;
}
.logo-tagline {
    font-size: 0.6rem;
    color: var(--cyan);
    letter-spacing: 0.12em;
    text-transform: uppercase;
}

/* Desktop Navigation */
.desktop-nav {
    display: none;
    align-items: center;
    gap: 1.25rem;
}
.desktop-nav > a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    padding: 0.5rem 0;
    transition: color 0.3s;
    white-space: nowrap;
}
.desktop-nav > a:hover,
.desktop-nav > a.active { color: var(--cyan); }

/* Dropdown */
.nav-dropdown { position: relative; }
.nav-dropdown-btn {
    display: flex;
    align-items: center;
    gap: 0.3rem;
    cursor: pointer;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--cyan);
    background: none;
    border: none;
    padding: 0.5rem 0;
    font-family: inherit;
    white-space: nowrap;
}
.nav-dropdown-btn::after {
    content: "▼";
    font-size: 0.5rem;
    transition: transform 0.3s;
}
.nav-dropdown:hover .nav-dropdown-btn::after { transform: rotate(180deg); }

/* Research Button - Orange */
.nav-dropdown-btn.research-btn {
    color: var(--orange);
}

.nav-dropdown-menu {
    position: absolute;
    top: 100%;
    right: 0;
    margin-top: 0.5rem;
    background: #12121a;
    border: 1px solid rgba(0, 255, 255, 0.3);
    border-radius: 8px;
    min-width: 200px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: all 0.3s;
    z-index: 100;
    overflow: hidden;
}
.nav-dropdown:hover .nav-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}
.nav-dropdown-menu a {
    display: block;
    padding: 0.75rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    border-bottom: 1px solid rgba(0, 255, 255, 0.1);
    font-size: 0.9rem;
    min-height: 44px;
    display: flex;
    align-items: center;
}
.nav-dropdown-menu a:last-child { border-bottom: none; }
.nav-dropdown-menu a:hover,
.nav-dropdown-menu a.active {
    background: rgba(0, 229, 255, 0.1);
    color: var(--cyan);
}

/* Request Demo Button - Cyan Gradient */
.btn-header {
    background: linear-gradient(135deg, #00e5ff 0%, #00b8d4 100%) !important;
    color: #0a0a12 !important;
    padding: 0.6rem 1.2rem;
    border-radius: 6px;
    font-weight: 700;
    text-decoration: none;
    font-size: 0.85rem;
    white-space: nowrap;
    transition: all 0.3s;
    box-shadow: 0 2px 10px rgba(0, 229, 255, 0.3);
    border: none;
}
.btn-header:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 20px rgba(0, 229, 255, 0.5);
    color: #0a0a12 !important;
}

/* Mobile Menu Button */
.mobile-menu-btn {
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    width: 44px;
    height: 44px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
    gap: 5px;
    z-index: 1001;
}
.mobile-menu-btn span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--cyan);
    transition: all 0.3s;
    border-radius: 2px;
}
.mobile-menu-btn.open span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}
.mobile-menu-btn.open span:nth-child(2) { opacity: 0; }
.mobile-menu-btn.open span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* Mobile Navigation */
.mobile-nav {
    display: none;
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--nav-bg);
    z-index: 999;
    overflow-y: auto;
    padding: 1rem;
    flex-direction: column;
    gap: 0.25rem;
}
.mobile-nav.open { display: flex; }

.mobile-nav a {
    display: block;
    padding: 0.875rem 1rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 1rem;
    border-radius: 8px;
    min-height: 48px;
    display: flex;
    align-items: center;
    transition: all 0.2s;
}
.mobile-nav a:hover,
.mobile-nav a.active {
    background: rgba(0, 229, 255, 0.1);
    color: var(--cyan);
}

.mobile-nav-section {
    font-family: 'Orbitron', sans-serif;
    font-size: 0.7rem;
    color: var(--cyan);
    text-transform: uppercase;
    letter-spacing: 0.15em;
    padding: 1rem 1rem 0.5rem;
    margin-top: 0.5rem;
    border-top: 1px solid var(--nav-border);
}
.mobile-nav-section:first-of-type {
    border-top: none;
    margin-top: 0;
}

/* Mobile Research Section - Orange */
.mobile-nav-section.research-section {
    color: var(--orange);
}

.mobile-nav .btn-header {
    margin-top: 1rem;
    text-align: center;
    justify-content: center;
    padding: 1rem;
}

/* ============================================
   RESPONSIVE BREAKPOINTS
   ============================================ */

/* Tablet and up - Show desktop nav */
@media (min-width: 1024px) {
    :root { --header-height: 80px; }
    
    .logo img { width: 60px; height: 60px; }
    .logo-brand { font-size: 1.3rem; }
    .logo-tagline { font-size: 0.65rem; }
    
    .desktop-nav { display: flex; }
    .mobile-menu-btn { display: none; }
    .mobile-nav { display: none !important; }
}

/* Large desktop */
@media (min-width: 1200px) {
    .header-inner { padding: 0 1.5rem; }
    .desktop-nav { gap: 1.5rem; }
    .desktop-nav > a { font-size: 0.95rem; }
}

/* Small mobile adjustments */
@media (max-width: 380px) {
    .logo-brand { font-size: 1rem; }
    .logo img { width: 45px; height: 45px; }
    .header-inner { padding: 0 0.75rem; }
}

/* ============================================
   GLOBAL MOBILE CONTENT FIXES
   ============================================ */

/* Prevent horizontal scroll */
html, body {
    overflow-x: hidden;
    max-width: 100vw;
}

/* Main content spacing */
main, #main, #main-content, .container {
    padding-top: var(--header-height);
}

/* Mobile-friendly images */
img {
    max-width: 100%;
    height: auto;
}

/* Ensure panels don't overflow */
.panel, .card, .data-card, .stat-card, .grav-card {
    max-width: 100%;
    overflow: hidden;
}

/* Grid fixes for mobile */
@media (max-width: 768px) {
    .panel-grid, .stats-grid, .grav-grid, .data-grid {
        grid-template-columns: 1fr !important;
        gap: 1rem;
    }
    
    .panel-grid.two-col,
    .panel-grid.three-col,
    .panel-grid.four-col {
        grid-template-columns: 1fr !important;
    }
    
    .panel.main, .panel.full {
        grid-column: span 1 !important;
    }
    
    /* Fix satellite/earth images */
    .panel-image, .panel-image.tall, .panel-image.square {
        aspect-ratio: 1;
        object-fit: contain;
        min-height: auto;
        max-height: 300px;
    }
    
    .moon-hero {
        grid-template-columns: 1fr !important;
        gap: 1.5rem;
    }
    
    .moon-image-container {
        max-width: 250px;
        margin: 0 auto;
    }
    
    .moon-data {
        grid-template-columns: 1fr 1fr;
        gap: 0.75rem;
    }
    
    /* Planet table scroll */
    .planet-table {
        display: block;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }
    
    /* Touch-friendly buttons */
    button, .btn, a.btn, .btn-header, .preset-btn, .btn-refresh {
        min-height: 48px;
        min-width: 48px;
    }
    
    /* Readable text */
    body { font-size: 16px; }
    
    .page-header h1 {
        font-size: 1.5rem;
        line-height: 1.3;
    }
    
    .page-subtitle {
        font-size: 0.95rem;
    }
    
    /* Status bar stacking */
    .status-bar {
        flex-direction: column;
        text-align: center;
        gap: 1rem;
    }
    
    .status-info {
        flex-wrap: wrap;
        justify-content: center;
        gap: 1rem;
    }
    
    /* Footer */
    footer, .site-footer {
        padding: 1.5rem 1rem;
    }
    
    .footer-brand, .footer-legal {
        font-size: 0.8rem;
    }
}

/* Small phone tweaks */
@media (max-width: 480px) {
    .container {
        padding-left: 0.75rem;
        padding-right: 0.75rem;
    }
    
    .moon-data {
        grid-template-columns: 1fr;
    }
    
    .stat-card, .grav-card {
        padding: 0.875rem;
    }
    
    .grav-value, .stat-value {
        font-size: 1.25rem;
    }
}