/* ============================================
   INSPIRE STARFIELD NAVIGATOR V3.1
   NASA-Style Open Source Astronomy Tool
   FIXED: Welcome screen centering and mobile display
   ============================================ */

:root {
    --primary-bg: #0B0E16;
    --secondary-bg: #131820;
    --panel-bg: #1A1F2E;
    --accent-blue: #4A9EFF;
    --accent-cyan: #00D4FF;
    --accent-green: #00FF88;
    --accent-orange: #FF8C42;
    --star-yellow: #FFD700;
    --text-primary: #E8EDF4;
    --text-secondary: #9BA5B7;
    --text-dim: #6B7280;
    --border-color: #2A3441;
    --glow-blue: rgba(74, 158, 255, 0.4);
    --glow-cyan: rgba(0, 212, 255, 0.3);
    --horizon-color: #1A3A52;
    --grass-dark: #1A3320;
    --grass-light: #2D5A3F;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(180deg, var(--primary-bg) 0%, #000000 100%);
    color: var(--text-primary);
    overflow-x: hidden;
    min-height: 100vh;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

.hidden {
    display: none !important;
}

/* ============================================
   TAP TO START SCREEN
   ============================================ */

.tap-to-start-screen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('tap-screen-back-ground-desktop.png') center/cover no-repeat;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9999;
    cursor: pointer;
}

.tap-to-start-screen::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(2px);
}

.tap-content {
    position: relative;
    text-align: center;
    z-index: 1;
}

.tap-logo {
    width: 120px;
    height: auto;
    margin-bottom: 2rem;
    filter: drop-shadow(0 0 20px rgba(74, 158, 255, 0.8));
    animation: logoFloat 3s ease-in-out infinite;
}

@keyframes logoFloat {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-10px); }
}

.tap-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 3rem;
    font-weight: 700;
    color: var(--accent-cyan);
    text-shadow: 0 0 30px rgba(0, 212, 255, 0.8);
    margin-bottom: 3rem;
    letter-spacing: 2px;
}

.tap-instruction {
    font-family: 'JetBrains Mono', monospace;
    font-size: 1.25rem;
    color: var(--text-primary);
    text-transform: uppercase;
    letter-spacing: 3px;
    animation: tapPulse 2s ease-in-out infinite;
}

@keyframes tapPulse {
    0%, 100% { opacity: 0.5; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.05); }
}

.tap-pulse {
    width: 80px;
    height: 80px;
    margin: 2rem auto 0;
    border: 3px solid var(--accent-cyan);
    border-radius: 50%;
    animation: pulseRing 2s ease-out infinite;
}

@keyframes pulseRing {
    0% {
        transform: scale(0.8);
        opacity: 1;
    }
    100% {
        transform: scale(1.5);
        opacity: 0;
    }
}

/* ============================================
   INTRO VIDEO SCREEN
   ============================================ */

.intro-video-screen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: #000;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9998;
}

.intro-video {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.skip-intro-btn {
    position: absolute;
    bottom: 30px;
    right: 30px;
    background: rgba(26, 31, 46, 0.8);
    backdrop-filter: blur(10px);
    border: 1px solid var(--accent-cyan);
    color: var(--accent-cyan);
    padding: 0.75rem 1.5rem;
    border-radius: 6px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    letter-spacing: 1px;
}

.skip-intro-btn:hover {
    background: var(--accent-cyan);
    color: #000;
    box-shadow: 0 0 20px var(--glow-cyan);
}

/* ============================================
   MAIN MENU SCREEN
   ============================================ */

.main-menu-screen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('main-menu-background-desktop.png') center/cover no-repeat;
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9997;
    opacity: 0;
    transition: opacity 1s ease;
}

.main-menu-screen:not(.hidden) {
    opacity: 1;
}

.main-menu-content {
    text-align: center;
    max-width: 500px;
    padding: 2rem;
}

.menu-logo-container {
    margin-bottom: 2rem;
}

.menu-logo {
    width: 150px;
    height: auto;
    filter: drop-shadow(0 0 30px rgba(74, 158, 255, 0.6));
}

.menu-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--accent-cyan);
    text-shadow: 0 0 30px rgba(0, 212, 255, 0.6);
    margin-bottom: 0.5rem;
    letter-spacing: 2px;
}

.menu-tagline {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.9rem;
    color: var(--star-yellow);
    text-transform: uppercase;
    letter-spacing: 2px;
    margin-bottom: 3rem;
}

.menu-buttons {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.menu-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1rem;
    padding: 1.25rem 2rem;
    border-radius: 8px;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.1rem;
    font-weight: 600;
    letter-spacing: 1px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
}

.menu-btn-primary {
    background: var(--accent-blue);
    border: 2px solid var(--accent-blue);
    color: #ffffff;
}

.menu-btn-primary:hover {
    background: #3A8EEF;
    box-shadow: 0 0 30px var(--glow-blue);
    transform: translateY(-2px);
}

.menu-btn-secondary {
    background: transparent;
    border: 2px solid var(--accent-cyan);
    color: var(--accent-cyan);
}

.menu-btn-secondary:hover {
    background: rgba(0, 212, 255, 0.1);
    box-shadow: 0 0 30px var(--glow-cyan);
    transform: translateY(-2px);
}

/* ============================================
   APP SETTINGS SCREEN
   ============================================ */

.app-settings-screen {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(11, 14, 22, 0.95);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 9996;
    overflow-y: auto;
    padding: 2rem 1rem;
}

.settings-content {
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.7);
}

.settings-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 2rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.settings-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.75rem;
    color: var(--accent-cyan);
    letter-spacing: 1px;
    margin: 0;
}

.close-settings-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 36px;
    height: 36px;
    border-radius: 6px;
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.close-settings-btn:hover {
    background: var(--accent-orange);
    color: white;
    border-color: var(--accent-orange);
}

.settings-section {
    margin-bottom: 2rem;
}

.settings-section-title {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.85rem;
    color: var(--text-dim);
    font-weight: 600;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    margin-bottom: 1rem;
}

.setting-item {
    margin-bottom: 1.5rem;
}

.setting-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.setting-value {
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent-green);
    font-weight: 600;
    font-size: 0.85rem;
}

.setting-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
    outline: none;
    cursor: pointer;
}

.setting-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--text-primary);
    cursor: pointer;
    box-shadow: 0 0 15px var(--glow-blue);
    border: 3px solid var(--accent-blue);
}

.setting-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--text-primary);
    cursor: pointer;
    border: 3px solid var(--accent-blue);
    box-shadow: 0 0 15px var(--glow-blue);
}

.settings-note {
    font-size: 0.85rem;
    color: var(--text-dim);
    line-height: 1.6;
    font-style: italic;
}

.settings-save-btn {
    width: 100%;
    margin-top: 1rem;
}

#inspire-starfield-app {
    width: 100%;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ============================================
   HEADER - NASA STYLE
   ============================================ */

.app-header {
    background: rgba(26, 31, 46, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    padding: 0.75rem 1rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    position: sticky;
    top: 0;
    z-index: 100;
}

.header-left {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.logo-container {
    display: flex;
    align-items: center;
}

.inspire-logo {
    height: 40px;
    width: auto;
}

.header-text {
    display: flex;
    flex-direction: column;
}

.app-title {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 0.5px;
    line-height: 1.2;
}

.app-tagline {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    color: var(--star-yellow);
    letter-spacing: 1px;
    text-transform: uppercase;
    font-weight: 500;
}

.header-right {
    display: flex;
    gap: 0.5rem;
}

.icon-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 0.5rem;
    border-radius: 6px;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.icon-btn:hover {
    background: var(--secondary-bg);
    border-color: var(--accent-blue);
    color: var(--accent-blue);
}

/* ============================================
   CONTROLS PANEL
   ============================================ */

.controls-panel {
    background: var(--panel-bg);
    border-bottom: 1px solid var(--border-color);
    padding: 1rem;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1rem;
}

.control-section {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.section-title {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    color: var(--text-dim);
    font-weight: 600;
    letter-spacing: 1px;
    text-transform: uppercase;
    margin-bottom: 0.25rem;
}

.control-group {
    display: flex;
    gap: 0.5rem;
}

.btn {
    padding: 0.625rem 1rem;
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-weight: 500;
    font-size: 0.8rem;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: 'Inter', sans-serif;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    justify-content: center;
    background: var(--secondary-bg);
    color: var(--text-primary);
}

.btn svg {
    flex-shrink: 0;
}

.btn-primary {
    background: var(--accent-blue);
    border-color: var(--accent-blue);
    color: #ffffff;
}

.btn-primary:hover {
    background: #3A8EEF;
    box-shadow: 0 0 15px var(--glow-blue);
}

.btn-secondary {
    background: transparent;
    border-color: var(--accent-cyan);
    color: var(--accent-cyan);
}

.btn-secondary:hover {
    background: rgba(0, 212, 255, 0.1);
    box-shadow: 0 0 15px var(--glow-cyan);
}

.btn-small {
    padding: 0.4rem 0.75rem;
    font-size: 0.7rem;
}

.btn-icon {
    padding: 0.5rem;
    min-width: 36px;
}

.btn-large {
    padding: 0.875rem 2rem;
    font-size: 0.9rem;
}

.location-display {
    padding: 0.625rem 0.875rem;
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
}

.display-label {
    color: var(--text-dim);
    margin-right: 0.5rem;
}

.time-controls {
    display: flex;
    flex-direction: column;
    gap: 0.625rem;
}

.time-display {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: var(--accent-cyan);
    font-weight: 500;
    letter-spacing: 0.5px;
}

.slider-container {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.time-nav-btn {
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    color: var(--accent-blue);
    padding: 0.5rem 0.75rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all 0.2s ease;
    font-weight: 600;
}

.time-nav-btn:hover {
    background: var(--panel-bg);
    border-color: var(--accent-blue);
    box-shadow: 0 0 10px var(--glow-blue);
}

#time-slider {
    flex: 1;
    -webkit-appearance: none;
    appearance: none;
    height: 4px;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-cyan));
    outline: none;
}

#time-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--text-primary);
    cursor: pointer;
    box-shadow: 0 0 10px var(--glow-blue);
    border: 2px solid var(--accent-blue);
}

#time-slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--text-primary);
    cursor: pointer;
    border: 2px solid var(--accent-blue);
    box-shadow: 0 0 10px var(--glow-blue);
}

.zoom-controls {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.zoom-display {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.8rem;
    color: var(--accent-green);
    min-width: 50px;
    text-align: center;
    font-weight: 600;
}

.orientation-toggle {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 0.5rem 0;
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 24px;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.toggle-slider {
    position: absolute;
    cursor: pointer;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: var(--secondary-bg);
    border: 1px solid var(--border-color);
    transition: 0.3s;
    border-radius: 24px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 3px;
    bottom: 3px;
    background-color: var(--text-dim);
    transition: 0.3s;
    border-radius: 50%;
}

input:checked + .toggle-slider {
    background-color: var(--accent-blue);
    border-color: var(--accent-blue);
}

input:checked + .toggle-slider:before {
    transform: translateX(20px);
    background-color: white;
}

.toggle-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.gyro-sensitivity-control {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
    padding: 0.75rem 0;
}

.sensitivity-label {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

.sensitivity-value {
    font-family: 'JetBrains Mono', monospace;
    color: var(--accent-green);
    font-weight: 600;
    font-size: 0.7rem;
}

.sensitivity-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 4px;
    border-radius: 2px;
    background: linear-gradient(90deg, var(--accent-green), var(--accent-orange));
    outline: none;
    cursor: pointer;
}

.sensitivity-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--text-primary);
    cursor: pointer;
    box-shadow: 0 0 10px var(--glow-blue);
    border: 2px solid var(--accent-green);
}

.sensitivity-slider::-moz-range-thumb {
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--text-primary);
    cursor: pointer;
    border: 2px solid var(--accent-green);
    box-shadow: 0 0 10px var(--glow-blue);
}

.sensitivity-marks {
    display: flex;
    justify-content: space-between;
    font-size: 0.65rem;
    color: var(--text-dim);
    margin-top: -0.25rem;
}

.sky-info {
    grid-column: 1 / -1;
    display: flex;
    gap: 1.5rem;
    padding: 0.75rem;
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    flex-wrap: wrap;
}

.info-item {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
}

.info-label {
    color: var(--text-dim);
    margin-right: 0.5rem;
}

/* ============================================
   CANVAS CONTAINER
   ============================================ */

.canvas-container {
    flex: 1;
    position: relative;
    overflow: hidden;
    background: radial-gradient(ellipse at top, rgba(74, 158, 255, 0.05) 0%, var(--primary-bg) 50%);
    min-height: 500px;
}

#starfield-canvas {
    width: 100%;
    height: 100%;
    display: block;
    cursor: crosshair;
    touch-action: none;
}

/* Direction Markers */
.direction-markers {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    z-index: 2;
}

.direction-marker {
    position: absolute;
    background: rgba(26, 31, 46, 0.8);
    backdrop-filter: blur(5px);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 0.5rem 0.75rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.25rem;
}

.direction-marker.north {
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
}

.direction-marker.east {
    top: 50%;
    right: 20px;
    transform: translateY(-50%);
}

.direction-marker.south {
    bottom: 180px;
    left: 50%;
    transform: translateX(-50%);
}

.direction-marker.west {
    top: 50%;
    left: 20px;
    transform: translateY(-50%);
}

.marker-icon {
    font-size: 1rem;
    color: var(--accent-cyan);
}

.marker-label {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--text-primary);
    letter-spacing: 1px;
}

.marker-degrees {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.6rem;
    color: var(--text-dim);
}

.zenith-marker {
    position: absolute;
    top: 20px;
    right: 20px;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    color: var(--accent-green);
    background: rgba(26, 31, 46, 0.8);
    backdrop-filter: blur(5px);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 0.4rem 0.75rem;
    pointer-events: none;
    z-index: 2;
    letter-spacing: 1px;
}

/* ============================================
   HORIZON LAYER WITH GROUND TERRAIN
   ============================================ */

.horizon-layer {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 160px;
    pointer-events: none;
    z-index: 3;
}

.horizon-line {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent-cyan), transparent);
    box-shadow: 0 0 10px var(--glow-cyan);
}

.ground-terrain {
    position: absolute;
    top: 2px;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, 
        rgba(26, 58, 82, 0.3) 0%, 
        rgba(26, 51, 32, 0.7) 40%,
        rgba(26, 51, 32, 0.9) 100%
    );
}

.terrain-grass {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 80px;
    background: linear-gradient(180deg,
        var(--grass-dark) 0%,
        var(--grass-light) 50%,
        #1A2820 100%
    );
    opacity: 0.8;
}

.terrain-pattern {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 40px;
    background-image: 
        repeating-linear-gradient(90deg,
            transparent 0px,
            rgba(0, 255, 136, 0.1) 2px,
            transparent 4px,
            transparent 20px
        );
}

/* ============================================
   COMPASS
   ============================================ */

.compass {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    pointer-events: auto;
}

.compass-ring {
    width: 80px;
    height: 80px;
    position: relative;
    background: rgba(26, 31, 46, 0.9);
    backdrop-filter: blur(10px);
    border: 2px solid var(--border-color);
    border-radius: 50%;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.5), 0 0 20px var(--glow-blue);
}

.compass-needle {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    transition: transform 0.3s ease-out;
}

.needle-north {
    position: absolute;
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-bottom: 30px solid var(--accent-orange);
    top: 10px;
    left: 50%;
    transform: translateX(-50%);
    filter: drop-shadow(0 0 5px var(--accent-orange));
}

.needle-north::after {
    content: '';
    position: absolute;
    width: 0;
    height: 0;
    border-left: 6px solid transparent;
    border-right: 6px solid transparent;
    border-top: 30px solid var(--accent-blue);
    top: 0;
    left: -6px;
    filter: drop-shadow(0 0 5px var(--accent-blue));
}

.compass-label {
    position: absolute;
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-primary);
}

.compass-n {
    top: 5px;
    left: 50%;
    transform: translateX(-50%);
    color: var(--accent-orange);
}

.compass-e {
    right: 8px;
    top: 50%;
    transform: translateY(-50%);
}

.compass-s {
    bottom: 5px;
    left: 50%;
    transform: translateX(-50%);
}

.compass-w {
    left: 8px;
    top: 50%;
    transform: translateY(-50%);
}

.compass-heading {
    position: absolute;
    bottom: -25px;
    left: 50%;
    transform: translateX(-50%);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.75rem;
    color: var(--accent-cyan);
    background: rgba(26, 31, 46, 0.9);
    padding: 0.25rem 0.5rem;
    border-radius: 4px;
    border: 1px solid var(--border-color);
    white-space: nowrap;
}

/* ============================================
   LOADING OVERLAY
   ============================================ */

.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(11, 14, 22, 0.95);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 100;
    transition: opacity 0.5s ease;
}

.loading-overlay.hidden {
    opacity: 0;
    pointer-events: none;
}

.loading-spinner {
    width: 50px;
    height: 50px;
    border: 3px solid var(--border-color);
    border-top: 3px solid var(--accent-blue);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: 1.5rem;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.loading-text {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    color: var(--accent-cyan);
    letter-spacing: 1px;
    margin-bottom: 0.5rem;
}

.loading-subtext {
    font-family: 'Inter', sans-serif;
    font-size: 0.8rem;
    color: var(--text-dim);
}

/* ============================================
   INFO PANEL
   ============================================ */

.info-panel {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: rgba(26, 31, 46, 0.98);
    backdrop-filter: blur(10px);
    border-top: 1px solid var(--border-color);
    padding: 0;
    transform: translateY(calc(100% - 40px));
    transition: transform 0.3s ease;
    z-index: 1000;
    max-height: 70vh;
    overflow-y: auto;
}

.info-panel.collapsed {
    transform: translateY(calc(100% - 40px));
}

.info-panel.expanded {
    transform: translateY(0);
}

.panel-handle {
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    border-bottom: 1px solid var(--border-color);
}

.handle-indicator {
    width: 40px;
    height: 4px;
    background: var(--border-color);
    border-radius: 2px;
}

.close-btn {
    position: absolute;
    top: 8px;
    right: 12px;
    background: transparent;
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    width: 28px;
    height: 28px;
    border-radius: 4px;
    font-size: 1.25rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

.close-btn:hover {
    background: var(--accent-orange);
    color: white;
    border-color: var(--accent-orange);
}

.info-content {
    padding: 1.5rem;
}

.object-image {
    width: 100%;
    height: 160px;
    background: radial-gradient(circle, rgba(74, 158, 255, 0.2), transparent);
    border-radius: 8px;
    border: 1px solid var(--border-color);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
}

.object-name {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.5rem;
    color: var(--accent-cyan);
    margin-bottom: 1rem;
    letter-spacing: 0.5px;
}

.object-metadata {
    display: flex;
    gap: 0.75rem;
    margin-bottom: 1rem;
    flex-wrap: wrap;
}

.metadata-item {
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.7rem;
    color: var(--text-dim);
    padding: 0.25rem 0.5rem;
    background: var(--secondary-bg);
    border-radius: 4px;
    border: 1px solid var(--border-color);
}

.info-tabs {
    display: flex;
    gap: 0.5rem;
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-color);
}

.tab-btn {
    padding: 0.625rem 1rem;
    background: transparent;
    border: none;
    border-bottom: 2px solid transparent;
    color: var(--text-secondary);
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: 'Inter', sans-serif;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.tab-btn.active {
    color: var(--accent-blue);
    border-bottom-color: var(--accent-blue);
}

.tab-btn:hover {
    color: var(--accent-cyan);
}

.tab-panel {
    display: none;
}

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

.tab-panel p {
    line-height: 1.7;
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ============================================
   MODAL
   ============================================ */

.modal {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(11, 14, 22, 0.9);
    backdrop-filter: blur(5px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 2000;
}

.modal.hidden {
    display: none;
}

.modal-content {
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem;
    max-width: 400px;
    width: 90%;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.5);
}

.modal-content h2 {
    color: var(--accent-cyan);
    margin-bottom: 1.5rem;
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.25rem;
    letter-spacing: 0.5px;
}

.input-group {
    margin-bottom: 1rem;
}

.input-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.input-group input {
    width: 100%;
    padding: 0.75rem;
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.9rem;
    font-family: 'JetBrains Mono', monospace;
    transition: all 0.2s ease;
}

.input-group input:focus {
    outline: none;
    border-color: var(--accent-blue);
    box-shadow: 0 0 10px var(--glow-blue);
}

.modal-actions {
    display: flex;
    gap: 0.5rem;
    margin-top: 1.5rem;
}

.modal-actions .btn {
    flex: 1;
}

/* ============================================
   INSTRUCTIONS OVERLAY - FIXED FOR MOBILE
   ============================================ */

.instructions-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(11, 14, 22, 0.95);
    backdrop-filter: blur(10px);
    display: flex;
    justify-content: center;
    align-items: center;
    z-index: 3000;
    overflow-y: auto;
    padding: 1rem;
}

.instructions-overlay.hidden {
    display: none;
}

.instructions-content {
    background: var(--panel-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 2rem 1.5rem;
    max-width: 600px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
    box-shadow: 0 10px 50px rgba(0, 0, 0, 0.7);
    margin: auto;
}

.instructions-logo {
    text-align: center;
    margin-bottom: 1.25rem;
}

.inspire-logo-large {
    height: 60px;
    width: auto;
    max-width: 100%;
}

.instructions-content h2 {
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--accent-cyan);
    text-align: center;
    letter-spacing: 0.5px;
}

.welcome-text {
    color: var(--text-secondary);
    text-align: center;
    margin-bottom: 1.5rem;
    line-height: 1.6;
    font-size: 0.9rem;
}

.instructions-grid {
    display: grid;
    gap: 0.875rem;
    margin: 1.5rem 0;
}

.instruction-item {
    display: flex;
    gap: 0.875rem;
    padding: 0.875rem;
    background: var(--secondary-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    align-items: flex-start;
}

.instruction-icon {
    font-size: 1.75rem;
    flex-shrink: 0;
}

.instruction-text strong {
    display: block;
    color: var(--accent-blue);
    margin-bottom: 0.25rem;
    font-size: 0.8rem;
    letter-spacing: 0.5px;
}

.instruction-text p {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin: 0;
    line-height: 1.5;
}

.cosmic-note {
    font-style: italic;
    color: var(--accent-green);
    text-align: center;
    margin: 1.5rem 0 1.25rem;
    font-size: 0.85rem;
    line-height: 1.5;
}

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

@media (max-width: 768px) {
    /* Tap to start screen - Mobile Background */
    .tap-to-start-screen {
        background: url('tap-screen-back-ground-mobile.png') center/cover no-repeat;
    }

    .tap-logo {
        width: 80px;
    }

    .tap-title {
        font-size: 2rem;
    }

    .tap-instruction {
        font-size: 1rem;
    }

    /* Main menu - Mobile Background */
    .main-menu-screen {
        background: url('main-menu-background-mobile.png') center/cover no-repeat;
    }

    .menu-logo {
        width: 100px;
    }

    .menu-title {
        font-size: 2rem;
    }

    .menu-tagline {
        font-size: 0.8rem;
    }

    .menu-btn {
        font-size: 1rem;
        padding: 1rem 1.5rem;
    }

    /* Settings */
    .settings-content {
        padding: 1.5rem;
    }

    .settings-title {
        font-size: 1.5rem;
    }

    /* Intro video */
    .skip-intro-btn {
        bottom: 20px;
        right: 20px;
        padding: 0.6rem 1.2rem;
        font-size: 0.8rem;
    }

    .app-title {
        font-size: 1rem;
    }

    .app-tagline {
        font-size: 0.65rem;
    }

    .inspire-logo {
        height: 32px;
    }

    .controls-panel {
        grid-template-columns: 1fr;
        padding: 0.75rem;
    }

    .control-group {
        flex-direction: column;
    }

    .btn span {
        font-size: 0.75rem;
    }

    .direction-marker {
        padding: 0.4rem 0.6rem;
    }

    .marker-label {
        font-size: 0.6rem;
    }

    .compass-ring {
        width: 70px;
        height: 70px;
    }

    /* MOBILE FIX: Properly centered welcome screen */
    .instructions-overlay {
        padding: 0.75rem;
    }

    .instructions-content {
        padding: 1.5rem 1.25rem;
        max-height: 95vh;
    }

    .inspire-logo-large {
        height: 50px;
    }

    .instructions-content h2 {
        font-size: 1.25rem;
    }

    .welcome-text {
        font-size: 0.85rem;
        margin-bottom: 1.25rem;
    }

    .instructions-grid {
        gap: 0.75rem;
        margin: 1.25rem 0;
    }

    .instruction-item {
        padding: 0.75rem;
    }

    .instruction-icon {
        font-size: 1.5rem;
    }

    .instruction-text strong {
        font-size: 0.75rem;
    }

    .instruction-text p {
        font-size: 0.7rem;
    }

    .cosmic-note {
        font-size: 0.8rem;
        margin: 1.25rem 0 1rem;
    }

    .btn-large {
        padding: 0.75rem 1.75rem;
        font-size: 0.85rem;
    }
}

/* Scrollbar */
.info-panel::-webkit-scrollbar,
.instructions-content::-webkit-scrollbar {
    width: 8px;
}

.info-panel::-webkit-scrollbar-track,
.instructions-content::-webkit-scrollbar-track {
    background: var(--secondary-bg);
}

.info-panel::-webkit-scrollbar-thumb,
.instructions-content::-webkit-scrollbar-thumb {
    background: var(--accent-blue);
    border-radius: 4px;
}

.info-panel::-webkit-scrollbar-thumb:hover,
.instructions-content::-webkit-scrollbar-thumb:hover {
    background: var(--accent-cyan);
}