/**
 * Main stylesheet for Space Simulation
 * All styling uses CSS variables for theme-aware consistency
 * Source of truth: theme.js
 */

:root {
    color-scheme: light dark;

    /* Light mode defaults */
    --bg-primary: #ffffff;
    --bg-secondary: rgba(255, 255, 255, 0.2);
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --border-accent: rgba(0, 170, 255, 0.15);
    --border-accent-hover: rgba(0, 170, 255, 0.6);
    --accent-color: #0066cc;
    --accent-light: #0055aa;
    --gold-primary: #e6b800;
    --gold-secondary: #ffcc00;
    --error-primary: #cc0000;
    --error-border: rgba(255, 107, 107, 0.15);
    --button-bg: linear-gradient(135deg, #0066cc, #0055aa);
    --button-shadow: rgba(0, 102, 204, 0.2);
    --secondary-bg: linear-gradient(135deg, #cccccc, #aaaaaa);
    --secondary-shadow: rgba(100, 100, 100, 0.2);
}

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

/* Body */
body {
    font-family: 'Inter', 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    overflow: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Canvas */
#canvas-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1;
}

/* UI Container */
.ui-container {
    position: fixed;
    top: 1.25rem;
    left: 1.25rem;
    z-index: 100;
    width: fit-content;
    max-width: calc(100vw - 2.5rem);
    max-height: calc(100vh - 2.5rem);
    display: flex;
    flex-direction: column;
    overflow-y: auto;
    padding-bottom: 1.25rem;
}

/* Header */
.header {
    background: var(--bg-secondary);
    backdrop-filter: blur(10px);
    padding: 1.25rem;
    border-radius: 12px;
    border: 1px solid var(--border-accent);
    margin-bottom: 1.25rem;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.header h1 {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.3125rem;
    background: linear-gradient(135deg, var(--gold-primary), var(--gold-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.header p {
    font-size: 0.8125rem;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

/* Control Panel */
.control-panel {
    background: var(--bg-secondary);
    backdrop-filter: blur(10px);
    padding: 0;
    border-radius: 12px;
    border: 1px solid var(--border-accent);
    margin-bottom: 1.25rem;
    position: relative;
    min-width: 15.625rem;
    transition: background-color 0.3s ease, border-color 0.3s ease, max-height 0.3s ease, opacity 0.3s ease;
    overflow: hidden;
    max-height: calc(100vh - 15rem);
    display: flex;
    flex-direction: column;
}

.control-panel-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem 1.25rem;
    cursor: pointer;
    border-bottom: 1px solid var(--border-accent);
}

.control-panel-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: color 0.3s ease;
}

.control-panel-toggle {
    font-size: 0.75rem;
    color: var(--text-secondary);
    transition: transform 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 20px;
    height: 20px;
}

.control-panel.collapsed .control-panel-toggle {
    transform: rotate(-90deg);
}

.control-panel-content {
    padding: 1.25rem;
    overflow-y: auto;
    overflow-x: hidden;
    flex: 1;
    max-height: calc(100vh - 15rem);
}

.control-panel.collapsed .control-panel-content {
    display: none;
}

.control-panel.collapsed {
    max-height: 2.5rem;
    opacity: 0.8;
}

/* Control Sections */
.control-section {
    margin-bottom: 1rem;
    border-bottom: 1px solid var(--border-accent);
    padding-bottom: 0.5rem;
}

.control-section:last-of-type {
    border-bottom: none;
}

.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    padding: 0.75rem 0.5rem;
    transition: background-color 0.2s ease;
    user-select: none;
    min-height: 2.75rem;
}

.section-header:hover {
    background: var(--bg-primary);
    border-radius: 6px;
}

.section-title {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent-color);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: color 0.3s ease;
}

.section-toggle {
    font-size: 0.75rem;
    color: var(--text-secondary);
    transition: transform 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.section-content {
    max-height: 1000px;
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.3s ease;
    opacity: 1;
}

.control-section.collapsed .section-content {
    max-height: 0;
    opacity: 0;
}

.control-section.collapsed .section-toggle {
    transform: rotate(-90deg);
}

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

.control-group label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-color);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    transition: color 0.3s ease;
}

.control-group input,
.control-group select {
    width: 100%;
    padding: 0.625rem 0.75rem;
    background: var(--bg-primary);
    border: 1px solid var(--border-accent);
    border-radius: 6px;
    color: var(--text-primary);
    font-size: 0.8125rem;
    transition: border-color 0.3s, background-color 0.3s, color 0.3s;
}

.control-group input:focus,
.control-group select:focus {
    outline: none;
    border-color: var(--border-accent-hover);
    background: var(--bg-secondary);
}

.status-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: 0.5rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.info-note {
    margin-top: 0.5rem;
    font-size: 0.6875rem;
    color: var(--text-secondary);
    line-height: 1.4;
    display: none;
}

.info-note.visible {
    display: block;
}

.slider-container {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.speed-slider {
    flex: 1;
    height: 0.375rem;
    border-radius: 0.1875rem;
    background: var(--border-accent);
    outline: none;
    -webkit-appearance: none;
    appearance: none;
    transition: background 0.3s ease;
}

.speed-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 1rem;
    height: 1rem;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: pointer;
    transition: all 0.2s;
    box-shadow: 0 0.125rem 0.5rem var(--button-shadow);
}

.speed-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0.25rem 0.75rem var(--button-shadow);
}

.speed-slider::-moz-range-thumb {
    width: 1rem;
    height: 1rem;
    border-radius: 50%;
    background: var(--accent-color);
    cursor: pointer;
    border: none;
    transition: all 0.2s;
    box-shadow: 0 0.125rem 0.5rem var(--button-shadow);
}

.speed-slider::-moz-range-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 0.25rem 0.75rem var(--button-shadow);
}

.speed-value {
    min-width: 2rem;
    text-align: center;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--accent-color);
    transition: color 0.3s ease;
}

.toggle-row {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    margin-top: 0.625rem;
    font-size: 0.75rem;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.toggle-row input {
    accent-color: var(--accent-color);
    transition: accent-color 0.3s ease;
}

.status-pill {
    padding: 0.25rem 0.5rem;
    border-radius: 999px;
    border: 1px solid var(--border-accent);
    font-size: 0.6875rem;
    text-transform: uppercase;
    letter-spacing: 0.4px;
    transition: border-color 0.3s, color 0.3s;
}

.status-pill.loading {
    border-color: var(--accent-color);
    color: var(--accent-color);
}

.status-pill.ready {
    border-color: var(--accent-light);
    color: var(--accent-light);
}

.status-pill.error {
    border-color: var(--error-primary);
    color: var(--error-primary);
}

.button-group {
    display: flex;
    gap: 0.625rem;
}

/* Buttons */
button {
    flex: 1;
    padding: 0.75rem 1rem;
    background: var(--button-bg);
    border: none;
    border-radius: 6px;
    color: white;
    font-weight: 600;
    font-size: 0.8125rem;
    cursor: pointer;
    transition: all 0.3s;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 16px var(--button-shadow);
}

button:active {
    transform: translateY(0);
}

button:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important;
}

button:disabled:hover {
    transform: none;
    box-shadow: none;
}

button.secondary {
    background: var(--secondary-bg);
}

button.secondary:hover {
    box-shadow: 0 8px 16px var(--secondary-shadow);
}

/* Info Panel */
#info-panel {
    position: fixed;
    bottom: 1.25rem;
    right: 1.25rem;
    background: var(--bg-secondary);
    backdrop-filter: blur(10px);
    padding: 1rem;
    border-radius: 8px;
    border: 1px solid var(--border-accent);
    font-size: 0.75rem;
    width: 18.75rem;
    max-height: 37.5rem;
    overflow-y: auto;
    overflow-x: hidden;
    z-index: 100;
    display: flex;
    flex-direction: column;
    transition: background-color 0.3s ease, border-color 0.3s ease;
}

.info-title {
    font-weight: 600;
    color: var(--accent-color);
    margin-bottom: 0.5rem;
    text-transform: uppercase;
    font-size: 0.6875rem;
    letter-spacing: 0.5px;
    transition: color 0.3s ease;
}

.info-item {
    display: flex;
    justify-content: space-between;
    margin-bottom: 0.25rem;
    color: var(--text-secondary);
    transition: color 0.3s ease;
}

.selection-section {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, opacity 0.3s ease;
    opacity: 0;
}

.selection-section.visible {
    max-height: 31.25rem;
    opacity: 1;
    margin-top: 0.75rem;
}

.selection-section.hidden {
    max-height: 0;
    opacity: 0;
    pointer-events: none;
}

.selection-divider {
    height: 1px;
    background: var(--border-accent);
    margin-bottom: 0.75rem;
    transition: background-color 0.3s ease;
}

.selection-title {
    color: var(--accent-color);
    margin-bottom: 0.5rem;
    transition: color 0.3s ease;
}

.deselect-btn {
    width: 100%;
    margin-top: 0.75rem;
    padding: 0.5rem 0.75rem;
    background: var(--accent-color);
    border: none;
    border-radius: 4px;
    color: white;
    font-weight: 600;
    font-size: 0.75rem;
    cursor: pointer;
    transition: all 0.2s;
}

.deselect-btn:hover {
    opacity: 0.8;
    transform: translateY(-1px);
}

.deselect-btn:active {
    transform: translateY(0);
}

/* Resize Handle */
.resize-handle {
    position: absolute;
    bottom: 0;
    right: 0;
    width: 30px;
    height: 30px;
    cursor: nwse-resize;
    background: linear-gradient(135deg, transparent 55%, var(--accent-color) 55%);
    border-radius: 0 0 12px 0;
    opacity: 0.2;
    transition: opacity 0.2s;
    pointer-events: auto;
    z-index: 10;
}

.control-panel:hover .resize-handle,
#info-panel:hover .resize-handle {
    opacity: 0.5;
}

.resize-handle:hover {
    opacity: 1 !important;
    background: linear-gradient(135deg, transparent 55%, #00ffff 55%);
}

/* Mobile Responsiveness */
@media (max-width: 48rem) {
    .ui-container {
        top: 0.75rem;
        left: 0.75rem;
        right: 0.75rem;
        max-width: calc(100vw - 1.5rem);
        max-height: calc(100vh - 1.5rem);
        padding-bottom: 0.75rem;
    }

    .header {
        padding: 0.875rem;
        margin-bottom: 0.75rem;
    }

    .header h1 {
        font-size: 1.125rem;
    }

    .header p {
        font-size: 0.6875rem;
    }

    .control-panel {
        padding: 0.875rem;
        min-width: 0;
        max-height: calc(100vh - 12rem);
    }

    .control-panel.collapsed {
        max-height: 2rem;
    }

    /* Mobile: sections collapsed by default */
    .control-section {
        border-bottom: 1px solid var(--border-accent);
    }

    .control-section.collapsed .section-content {
        max-height: 0;
        opacity: 0;
    }

    .section-header {
        cursor: pointer;
        pointer-events: auto;
        min-height: 2.75rem;
    }

    .section-toggle {
        display: flex;
    }

    .control-group {
        margin-bottom: 0.75rem;
    }

    .control-group label {
        font-size: 0.6875rem;
    }

    .control-group input,
    .control-group select {
        padding: 0.5rem 0.625rem;
        font-size: 0.75rem;
    }

    button {
        padding: 0.625rem 0.75rem;
        font-size: 0.75rem;
    }

    #info-panel {
        width: min(100%, 15rem);
        right: 0.75rem;
        bottom: 0.75rem;
        padding: 0.75rem;
        font-size: 0.6875rem;
    }
}

/* Desktop Responsiveness */
@media (min-width: 48.0625rem) {
    /* Desktop: sections expanded by default */
    .control-section .section-content {
        max-height: none;
        opacity: 1;
    }

    .section-header {
        cursor: default;
        pointer-events: none;
    }

    .section-toggle {
        display: none;
    }
}