/* ============================================
   Terraposter - Styles
   Minimalist, mobile-first, lighter grey theme
   ============================================ */

/* CSS Variables */
:root {
    /* Lighter grey color palette */
    --bg-primary: #1a1a1a;
    --bg-secondary: #242424;
    --bg-card: #2a2a2a;
    --bg-card-hover: #333333;
    --border-color: #404040;
    --border-active: #666666;

    --text-primary: #f0f0f0;
    --text-secondary: #b0b0b0;
    --text-muted: #808080;

    --accent: #ffffff;
    --accent-dim: #999999;

    --success: #4ade80;
    --error: #f87171;

    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;

    /* Border Radius */
    --radius-sm: 6px;
    --radius-md: 10px;
    --radius-lg: 14px;

    /* Transitions */
    --transition-fast: 120ms ease;
    --transition-base: 200ms ease;
}

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

html {
    font-size: 16px;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* App Container - Mobile First */
.app-container {
    max-width: 600px;
    margin: 0 auto;
    padding: var(--spacing-md);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Header - Centered */
.header {
    text-align: center;
    padding: var(--spacing-lg) 0;
    margin-bottom: var(--spacing-lg);
}

.header-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
}

.logo-icon {
    width: 48px;
    height: 48px;
    object-fit: contain;
    margin-bottom: var(--spacing-xs);
}

.site-title {
    font-size: 1.75rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.site-tagline {
    font-size: 0.875rem;
    color: var(--text-muted);
    letter-spacing: 0.02em;
}

/* Main Content - Single Column Mobile */
.main-content {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
    flex: 1;
}

/* Poster Preview */
.preview-section {
    width: 100%;
}

.poster-frame {
    position: relative;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    overflow: hidden;
    aspect-ratio: 3/4;
    width: 100%;
}

.poster-frame canvas {
    width: 100%;
    height: 100%;
    display: block;
}

/* Loading Overlay */
.loading-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(26, 26, 26, 0.95);
    display: flex;
    justify-content: center;
    align-items: center;
    opacity: 1;
    transition: opacity var(--transition-base);
}

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

.loader {
    text-align: center;
}

.loader-spinner {
    width: 32px;
    height: 32px;
    border: 2px solid var(--border-color);
    border-top-color: var(--text-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 0 auto var(--spacing-md);
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.loader-text {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

/* Controls Section */
.controls-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.control-group {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.control-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* Location Controls */
.location-controls {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.search-container {
    display: flex;
    gap: var(--spacing-sm);
}

.search-input {
    flex: 1;
    padding: 12px 14px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 1rem;
    outline: none;
    transition: border-color var(--transition-base);
}

.search-input:focus {
    border-color: var(--border-active);
}

.search-input::placeholder {
    color: var(--text-muted);
}

.location-info {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* Custom Text Inputs */
.text-inputs {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.input-row {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.input-row label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.text-input {
    padding: 10px 12px;
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-size: 0.9rem;
    outline: none;
    transition: border-color var(--transition-base);
}

.text-input:focus {
    border-color: var(--border-active);
}

.text-input::placeholder {
    color: var(--text-muted);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 16px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-card);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-base);
    -webkit-tap-highlight-color: transparent;
}

.btn:active {
    transform: scale(0.98);
}

.btn:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-primary {
    background: var(--text-primary);
    color: var(--bg-primary);
    border-color: var(--text-primary);
}

.btn-primary:hover:not(:disabled) {
    background: var(--text-secondary);
    border-color: var(--text-secondary);
}

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

.btn-secondary:hover:not(:disabled) {
    background: var(--bg-card-hover);
    border-color: var(--border-active);
}

.btn-apply {
    width: 100%;
    background: var(--bg-secondary);
    border: 1px solid var(--border-active);
}

.btn-apply:hover:not(:disabled) {
    background: var(--bg-card-hover);
}

.btn-download {
    width: 100%;
    padding: 14px 20px;
    font-size: 1rem;
    font-weight: 600;
    background: var(--text-primary);
    color: var(--bg-primary);
    border: none;
    border-radius: var(--radius-md);
}

.btn-download:hover:not(:disabled) {
    background: #cccccc;
}

/* Theme Grid */
.theme-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 6px;
}

@media (min-width: 400px) {
    .theme-grid {
        grid-template-columns: repeat(8, 1fr);
    }
}

.theme-btn {
    position: relative;
    aspect-ratio: 1;
    border: 2px solid transparent;
    border-radius: var(--radius-sm);
    cursor: pointer;
    overflow: hidden;
    transition: all var(--transition-fast);
    -webkit-tap-highlight-color: transparent;
}

.theme-btn:active {
    transform: scale(0.95);
}

.theme-btn.active {
    border-color: var(--text-primary);
}

.theme-btn .theme-preview {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
}

.theme-btn .theme-bg {
    flex: 1;
}

.theme-btn .theme-roads {
    height: 2px;
    margin: 1px 2px;
    border-radius: 1px;
}

.theme-btn .theme-name {
    display: none;
}

/* Size Options */
.size-options {
    display: flex;
    gap: var(--spacing-sm);
}

.size-btn {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 12px 8px;
    background: var(--bg-secondary);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-muted);
    font-size: 0.75rem;
    cursor: pointer;
    transition: all var(--transition-base);
    -webkit-tap-highlight-color: transparent;
}

.size-btn:active {
    transform: scale(0.98);
}

.size-btn.active {
    border-color: var(--text-primary);
    color: var(--text-primary);
}

.size-preview {
    background: var(--text-muted);
    border-radius: 2px;
}

.size-preview.portrait {
    width: 18px;
    height: 24px;
}

.size-preview.square {
    width: 22px;
    height: 22px;
}

.size-preview.landscape {
    width: 24px;
    height: 18px;
}

.size-btn.active .size-preview {
    background: var(--text-primary);
}

/* Slider */
.slider-container {
    padding: 0;
}

.slider {
    width: 100%;
    height: 4px;
    background: var(--bg-secondary);
    border-radius: 2px;
    outline: none;
    -webkit-appearance: none;
    appearance: none;
}

.slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--text-primary);
    border-radius: 50%;
    cursor: pointer;
    transition: transform var(--transition-fast);
}

.slider::-webkit-slider-thumb:active {
    transform: scale(1.1);
}

.slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    background: var(--text-primary);
    border: none;
    border-radius: 50%;
    cursor: pointer;
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    margin-top: var(--spacing-sm);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.slider-value {
    color: var(--text-primary);
    font-weight: 500;
}

/* Share Section */
.share-section {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
}

.share-label {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-muted);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.share-buttons {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.share-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    background: var(--bg-secondary);
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition-base);
    -webkit-tap-highlight-color: transparent;
}

.share-btn:hover {
    border-color: var(--border-active);
    color: var(--text-primary);
}

.share-btn:active {
    transform: scale(0.95);
}

.share-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.share-btn svg {
    width: 20px;
    height: 20px;
}

/* Footer */
.footer {
    text-align: center;
    padding: var(--spacing-xl) 0 var(--spacing-md);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-sm);
}

.github-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.85rem;
    transition: all var(--transition-base);
}

.github-link:hover {
    border-color: var(--border-active);
    color: var(--text-primary);
}

.footer-credits {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.footer-note {
    font-size: 0.7rem;
    color: var(--text-muted);
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background: var(--text-primary);
    color: var(--bg-primary);
    padding: 12px 20px;
    border-radius: var(--radius-md);
    font-size: 0.875rem;
    font-weight: 500;
    opacity: 0;
    transition: all 0.3s ease;
    z-index: 1000;
}

.toast.show {
    transform: translateX(-50%) translateY(0);
    opacity: 1;
}

/* Desktop styles */
@media (min-width: 768px) {
    .app-container {
        max-width: 900px;
        padding: var(--spacing-xl);
    }

    .main-content {
        display: grid;
        grid-template-columns: 1fr 320px;
        gap: var(--spacing-xl);
    }

    .poster-frame {
        max-width: 100%;
    }

    .theme-grid {
        grid-template-columns: repeat(6, 1fr);
    }
}