@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&display=swap');

:root {
    --bg-dark: #050508;
    --panel-bg: rgba(12, 14, 22, 0.65);
    --panel-border: rgba(255, 255, 255, 0.08);
    --accent-primary: #00e5ff;
    --accent-glow: rgba(0, 229, 255, 0.5);
    --accent-secondary: #ff3366;
    --text-main: #f0f4f8;
    --text-muted: #94a0b8;
    --glass-shadow: 0 16px 40px rgba(0, 0, 0, 0.6), inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

body, html {
    margin: 0;
    padding: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    background-color: var(--bg-dark);
    font-family: 'Outfit', -apple-system, sans-serif;
    color: var(--text-main);
    -webkit-font-smoothing: antialiased;
}

#container {
    position: relative;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, #10121a 0%, #050508 100%);
}

#star-canvas {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* Glassmorphism Top Buttons */
.top-left-controls {
    position: absolute;
    top: 24px;
    left: 24px;
    z-index: 20;
    display: flex;
    gap: 12px;
}

.glass-btn {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    color: var(--text-main);
    padding: 10px 20px;
    border-radius: 12px;
    font-family: 'Outfit', sans-serif;
    font-size: 0.9rem;
    font-weight: 500;
    letter-spacing: 0.5px;
    cursor: pointer;
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 15px rgba(0,0,0,0.3);
}

.glass-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
    border-color: rgba(255, 255, 255, 0.2);
}

/* Modal Styles */
.modal-overlay {
    position: fixed;
    top: 0; left: 0; width: 100%; height: 100%;
    background: rgba(5, 5, 8, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: 100;
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 1;
    transition: opacity 0.4s ease;
}

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

.modal-content {
    background: var(--panel-bg);
    border: 1px solid var(--panel-border);
    box-shadow: var(--glass-shadow);
    padding: 40px;
    border-radius: 24px;
    max-width: 500px;
    text-align: center;
    transform: translateY(0) scale(1);
    transition: transform 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.modal-overlay.hidden .modal-content {
    transform: translateY(20px) scale(0.95);
}

.modal-content h2 {
    margin-top: 0;
    font-size: 1.5rem;
    color: var(--text-main);
    font-weight: 400;
    letter-spacing: 0.5px;
    margin-bottom: 25px;
}

.modal-content p {
    color: #a0aabf;
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 15px;
    font-weight: 300;
}

.clean-btn {
    background: var(--accent-primary);
    color: #050508;
    border: none;
    padding: 12px 28px;
    border-radius: 8px;
    font-family: 'Outfit', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-top: 20px;
}

.clean-btn:hover {
    filter: brightness(1.15);
    transform: translateY(-1px);
}

/* Glassmorphism UI Panel */
#ui-overlay {
    position: absolute;
    top: 24px;
    right: 24px;
    width: 380px;
    max-height: calc(100vh - 48px);
    overflow-y: auto;
    box-sizing: border-box;
    background: var(--panel-bg);
    backdrop-filter: blur(24px) saturate(150%);
    -webkit-backdrop-filter: blur(24px) saturate(150%);
    border: 1px solid var(--panel-border);
    border-radius: 20px;
    padding: 28px;
    z-index: 10;
    box-shadow: var(--glass-shadow);
    display: block;
    transform-origin: top right;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

#ui-overlay.hidden {
    opacity: 0;
    pointer-events: none;
    transform: scale(0.95) translateY(-15px);
    visibility: hidden;
}

#ui-overlay::-webkit-scrollbar {
    width: 6px;
}
#ui-overlay::-webkit-scrollbar-track {
    background: transparent;
    margin: 10px;
}
#ui-overlay::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.15);
    border-radius: 10px;
}
#ui-overlay::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.25);
}

header {
    margin-bottom: 24px;
    text-align: center;
}

header h1 {
    margin: 0 0 6px 0;
    font-size: 1.6rem;
    font-weight: 700;
    background: linear-gradient(135deg, #fff, #a5d8ff);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: -0.5px;
}

.subtitle {
    margin: 0;
    font-size: 0.85rem;
    color: var(--accent-primary);
    font-weight: 500;
    letter-spacing: 0.5px;
    text-transform: uppercase;
    opacity: 0.9;
}

/* Collapsible Groups */
details {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: 14px;
    margin-bottom: 16px;
    overflow: hidden;
    transition: all 0.3s ease;
}

details[open] {
    background: rgba(0, 0, 0, 0.2);
    border-color: rgba(255, 255, 255, 0.08);
    box-shadow: inset 0 2px 15px rgba(0,0,0,0.2);
}

summary {
    padding: 16px 20px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-main);
    text-transform: uppercase;
    letter-spacing: 1px;
    cursor: pointer;
    list-style: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: background 0.2s;
    user-select: none;
}

summary:hover {
    background: rgba(255, 255, 255, 0.04);
}

summary::after {
    content: "+";
    font-size: 1.2rem;
    font-weight: 300;
    color: var(--accent-primary);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

details[open] summary::after {
    transform: rotate(45deg);
    color: var(--text-muted);
}

summary::-webkit-details-marker {
    display: none;
}

.details-content {
    padding: 0 20px 20px 20px;
    display: flex;
    flex-direction: column;
    gap: 20px;
    animation: fadeInDown 0.4s ease forwards;
}

@keyframes fadeInDown {
    from { opacity: 0; transform: translateY(-10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Controls */
.control-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.control-group > label {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-muted);
}

/* Custom Dropdown */
.dropdown {
    width: 100%;
    padding: 10px 14px;
    border-radius: 8px;
    border: 1px solid var(--panel-border);
    background: rgba(0, 0, 0, 0.3);
    color: var(--text-main);
    font-family: 'Outfit', sans-serif;
    font-size: 0.9rem;
    appearance: none;
    outline: none;
    cursor: pointer;
    transition: all 0.2s;
}

.dropdown:hover, .dropdown:focus {
    border-color: rgba(255, 255, 255, 0.2);
    background: rgba(0, 0, 0, 0.4);
}

/* Custom Sliders */
.slider-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 4px;
}

.value-badge {
    background: rgba(0, 229, 255, 0.1);
    color: var(--accent-primary);
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.8rem;
    font-weight: 700;
    font-variant-numeric: tabular-nums;
    border: 1px solid rgba(0, 229, 255, 0.2);
    box-shadow: 0 0 10px rgba(0, 229, 255, 0.1);
}

input[type=range] {
    -webkit-appearance: none;
    width: 100%;
    background: transparent;
    padding: 10px 0;
}

input[type=range]:focus {
    outline: none;
}

input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 6px;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.08);
    border-radius: 3px;
    border: 1px solid rgba(0,0,0,0.3);
}

input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 18px;
    width: 18px;
    border-radius: 50%;
    background: #fff;
    cursor: pointer;
    margin-top: -7px;
    box-shadow: 0 2px 5px rgba(0,0,0,0.5), 0 0 12px var(--accent-glow);
    transition: transform 0.1s, box-shadow 0.2s;
    border: 2px solid var(--accent-primary);
}

input[type=range]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 2px 8px rgba(0,0,0,0.6), 0 0 20px var(--accent-primary);
}

.control-desc {
    margin: 4px 0 0 0;
    font-size: 0.75rem;
    color: var(--text-muted);
    font-style: italic;
    opacity: 0.8;
}

/* Checkboxes */
.checkboxes {
    display: flex;
    flex-direction: column;
    gap: 14px;
    background: rgba(0, 0, 0, 0.15);
    padding: 16px;
    border-radius: 12px;
    border: 1px solid rgba(255, 255, 255, 0.03);
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.95rem;
    cursor: pointer;
    color: var(--text-main);
    font-weight: 400;
    transition: color 0.2s;
}

.checkbox-label:hover {
    color: #fff;
}

.checkbox-label input {
    display: none;
}

.custom-checkbox {
    width: 20px;
    height: 20px;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 6px;
    position: relative;
    transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    display: flex;
    align-items: center;
    justify-content: center;
}

.checkbox-label input:checked + .custom-checkbox {
    background: var(--accent-primary);
    border-color: var(--accent-primary);
    box-shadow: 0 0 15px var(--accent-glow);
}

.checkbox-label input:checked + .custom-checkbox::after {
    content: '';
    width: 5px;
    height: 10px;
    border: solid #000;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
    margin-bottom: 2px;
}

/* Buttons */
.secondary-btn {
    width: 100%;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-main);
    padding: 12px;
    border-radius: 10px;
    font-family: 'Outfit', sans-serif;
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.secondary-btn:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-1px);
}

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

/* Color Pickers */
.color-pickers {
    display: flex;
    gap: 16px;
    background: rgba(0, 0, 0, 0.15);
    padding: 12px;
    border-radius: 10px;
}
.color-pickers > div {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 8px;
}
.color-pickers label {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    color: var(--text-muted);
}
input[type="color"] {
    -webkit-appearance: none;
    border: none;
    width: 100%;
    height: 36px;
    border-radius: 8px;
    cursor: pointer;
    background: none;
    padding: 0;
}
input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}
input[type="color"]::-webkit-color-swatch {
    border: 2px solid rgba(255,255,255,0.1);
    border-radius: 8px;
    box-shadow: inset 0 2px 4px rgba(0,0,0,0.5);
}


/* Footer / Hints */
#interaction-hint p, #footer p {
    text-align: center;
    margin: 0;
    font-size: 0.8rem;
    color: var(--text-muted);
    font-weight: 300;
}

#interaction-hint {
    margin: 20px 0 10px 0;
    padding: 12px;
    background: rgba(255, 255, 255, 0.03);
    border-radius: 8px;
    border: 1px dashed rgba(255, 255, 255, 0.1);
}

#footer {
    margin-top: 10px;
    opacity: 0.6;
}

/* Lightcurve (if generated dynamically) */
#lightcurve-container {
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.08);
    border-radius: 12px;
    overflow: hidden;
    margin-top: 8px;
    box-shadow: inset 0 2px 10px rgba(0,0,0,0.3);
}
.lc-header {
    background: rgba(255, 255, 255, 0.04);
    padding: 10px 14px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
}
.lc-title {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-main);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}
.lc-status {
    font-size: 0.75rem;
    color: var(--accent-secondary);
    font-weight: bold;
    animation: pulse 2s infinite;
}
@keyframes pulse {
    0% { opacity: 1; text-shadow: 0 0 8px rgba(255,51,102,0.5); }
    50% { opacity: 0.4; text-shadow: none; }
    100% { opacity: 1; text-shadow: 0 0 8px rgba(255,51,102,0.5); }
}
.lc-plot-area {
    padding: 12px;
    height: 150px;
}
#lightcurve-canvas {
    width: 100%;
    height: 100%;
    display: block;
}