/* Skip link for accessibility */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary, #6366f1);
    color: #fff;
    padding: 8px 16px;
    z-index: 10000;
    transition: top 0.2s;
    font-size: 14px;
    border-radius: 0 0 4px 0;
}
.skip-link:focus {
    top: 0;
}

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

:root {
    --primary: #667eea;
    --secondary: #764ba2;
    --dark-bg: #0f0f23;
    --dark-surface: #1a1a3e;
    --dark-border: #2d2d5f;
    --text-primary: #e0e0f8;
    --text-secondary: #b0b0d0;
    --success: #00d4aa;
    --warning: #ff9a56;
    --error: #ff6b6b;
    --accent-1: #667eea;
    --accent-2: #764ba2;
}

/* Light Theme Override */
[data-theme="light"] {
    --dark-bg: #f5f5fa;
    --dark-surface: #ffffff;
    --dark-border: #e0e0e5;
    --text-primary: #1a1a2e;
    --text-secondary: #5a5a70;
}

[data-theme="light"] body {
    background: linear-gradient(135deg, #f5f5fa 0%, #ffffff 100%);
}

[data-theme="light"] .app-loader {
    background: linear-gradient(135deg, #f5f5fa 0%, #ffffff 100%);
}

[data-theme="light"] .color-display-section,
[data-theme="light"] .palette-info-section,
[data-theme="light"] .export-section,
[data-theme="light"] .history-section,
[data-theme="light"] .recommendations-section {
    background: rgba(255, 255, 255, 0.8);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid rgba(102, 126, 234, 0.15);
    box-shadow: 0 8px 32px rgba(102, 126, 234, 0.1);
}

[data-theme="light"] .color-display-section:hover,
[data-theme="light"] .palette-info-section:hover,
[data-theme="light"] .export-section:hover,
[data-theme="light"] .history-section:hover,
[data-theme="light"] .recommendations-section:hover {
    border-color: rgba(102, 126, 234, 0.3);
}

[data-theme="light"] .mode-select,
[data-theme="light"] .format-btn {
    background: rgba(255, 255, 255, 0.9);
    border-color: rgba(102, 126, 234, 0.2);
}

[data-theme="light"] .mode-select:hover,
[data-theme="light"] .format-btn:hover {
    background: rgba(102, 126, 234, 0.1);
    border-color: rgba(102, 126, 234, 0.4);
}

[data-theme="light"] .export-btn {
    background: rgba(255, 255, 255, 0.9);
    border-color: rgba(102, 126, 234, 0.2);
}

[data-theme="light"] .export-btn:hover {
    background: rgba(102, 126, 234, 0.1);
    border-color: rgba(102, 126, 234, 0.4);
    color: var(--primary);
}

[data-theme="light"] .modal-content {
    background: #ffffff;
    border-color: rgba(102, 126, 234, 0.2);
}

[data-theme="light"] .export-textarea {
    background: rgba(102, 126, 234, 0.05);
    border-color: rgba(102, 126, 234, 0.2);
}

[data-theme="light"] .export-textarea:focus {
    background: rgba(102, 126, 234, 0.1);
    border-color: rgba(102, 126, 234, 0.4);
}

[data-theme="light"] .rec-card {
    background: rgba(255, 255, 255, 0.9);
    border-color: rgba(102, 126, 234, 0.2);
}

[data-theme="light"] .rec-card:hover {
    background: rgba(102, 126, 234, 0.1);
    border-color: rgba(102, 126, 234, 0.4);
}

[data-theme="light"] .history-palette {
    box-shadow: 0 2px 8px rgba(102, 126, 234, 0.15);
}

[data-theme="light"] .history-palette:hover {
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.25);
}

[data-theme="light"] .clear-history-btn {
    background: rgba(255, 107, 107, 0.1);
    border-color: rgba(255, 107, 107, 0.3);
}

[data-theme="light"] .clear-history-btn:hover {
    background: rgba(255, 107, 107, 0.2);
    border-color: var(--error);
}

/* Theme Toggle Button */
.theme-toggle {
    position: fixed;
    top: 12px;
    right: 56px;
    z-index: 1000;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.15);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    font-size: 18px;
    cursor: pointer;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.theme-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
    transform: scale(1.1);
}

[data-theme="light"] .theme-toggle {
    background: rgba(102, 126, 234, 0.1);
    border-color: rgba(102, 126, 234, 0.2);
}

[data-theme="light"] .theme-toggle:hover {
    background: rgba(102, 126, 234, 0.2);
}

@media (prefers-color-scheme: light) {
    :root:not([data-theme]) {
        --dark-bg: #f5f5f5;
        --dark-surface: #ffffff;
        --dark-border: #e0e0e0;
        --text-primary: #1a1a1a;
        --text-secondary: #666666;
    }
}

html {
    scroll-behavior: smooth;
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
}

body {
    background: linear-gradient(135deg, var(--dark-bg) 0%, var(--dark-surface) 100%);
    color: var(--text-primary);
    min-height: 100vh;
    overflow-x: hidden;
}

/* App Loader */
.app-loader {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, var(--dark-bg) 0%, var(--dark-surface) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    opacity: 1;
    transition: opacity 0.3s ease;
    pointer-events: auto;
}

.app-loader.hidden {
    opacity: 0;
    pointer-events: none;
}

.loader-content {
    text-align: center;
}

.loader-emoji {
    font-size: 48px;
    margin-bottom: 20px;
    animation: bounce 0.6s infinite;
}

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

.loader-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid rgba(102, 126, 234, 0.2);
    border-top-color: var(--primary);
    border-radius: 50%;
    margin: 0 auto 20px;
    animation: spin 0.8s linear infinite;
}

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

.loader-text {
    color: var(--text-secondary);
    font-size: 14px;
}

/* App Container */
.app-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

/* Header */
.app-header {
    text-align: center;
    margin-bottom: 40px;
    padding: 20px 0;
}

.app-header h1 {
    font-size: 36px;
    font-weight: 700;
    margin-bottom: 10px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.subtitle {
    font-size: 16px;
    color: var(--text-secondary);
    margin-top: 8px;
}

/* Ad Containers */
.ad-container {
    margin: 20px 0;
    min-height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.ad-placeholder {
    width: 100%;
    height: 90px;
    background: rgba(102, 126, 234, 0.05);
    border: 1px dashed rgba(102, 126, 234, 0.2);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-size: 12px;
}

/* Color Display Section */
.color-display-section {
    background: rgba(26, 26, 62, 0.4);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--dark-border);
    border-radius: 20px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.2);
}

/* Color Slots */
.color-slots {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 16px;
    margin-bottom: 30px;
}

@media (max-width: 768px) {
    .color-slots {
        grid-template-columns: 1fr;
    }
}

.color-slot {
    position: relative;
    border-radius: 12px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 16px rgba(0, 0, 0, 0.3);
    height: 120px;
    min-height: 120px;
}

.color-slot:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.4);
}

.color-slot.locked {
    border: 3px solid rgba(102, 126, 234, 0.6);
}

.color-display {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.color-code {
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 12px;
    font-weight: 600;
    color: white;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.5);
    text-align: center;
    padding: 0 8px;
    word-break: break-all;
    background: rgba(0, 0, 0, 0.2);
    padding: 8px;
    border-radius: 4px;
}

.color-actions {
    position: absolute;
    bottom: 8px;
    left: 8px;
    right: 8px;
    display: flex;
    gap: 8px;
    opacity: 0;
    transition: opacity 0.2s ease;
}

.color-slot:hover .color-actions {
    opacity: 1;
}

.color-action-btn {
    flex: 1;
    background: rgba(0, 0, 0, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.2);
    color: white;
    padding: 6px;
    border-radius: 6px;
    font-size: 12px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-weight: 500;
}

.color-action-btn:hover {
    background: rgba(0, 0, 0, 0.6);
    border-color: rgba(255, 255, 255, 0.4);
}

.lock-btn::before {
    content: '🔓 ';
}

.color-slot.locked .lock-btn::before {
    content: '🔒 ';
}

/* Controls Panel */
.controls-panel {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.control-row {
    display: flex;
    gap: 12px;
    align-items: center;
    flex-wrap: wrap;
}

.generate-btn {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    border: none;
    padding: 12px 28px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

.generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(102, 126, 234, 0.4);
}

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

.spacebar-hint {
    font-size: 12px;
    color: var(--text-secondary);
    white-space: nowrap;
}

/* Mode Selector */
.mode-selector {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.mode-selector label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

.mode-select {
    padding: 10px 12px;
    background: rgba(26, 26, 62, 0.6);
    border: 1px solid var(--dark-border);
    color: var(--text-primary);
    border-radius: 8px;
    font-size: 14px;
    cursor: pointer;
    transition: all 0.2s ease;
}

.mode-select:hover {
    border-color: var(--primary);
    background: rgba(102, 126, 234, 0.1);
}

.mode-select:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(102, 126, 234, 0.15);
}

/* Code Format */
.code-format {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.code-format label {
    font-size: 14px;
    font-weight: 600;
    color: var(--text-primary);
}

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

.format-btn {
    flex: 1;
    padding: 8px 12px;
    background: rgba(26, 26, 62, 0.6);
    border: 1px solid var(--dark-border);
    color: var(--text-secondary);
    border-radius: 6px;
    font-size: 12px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.format-btn:hover {
    border-color: var(--primary);
    background: rgba(102, 126, 234, 0.1);
}

.format-btn.active {
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    border-color: var(--primary);
    color: white;
}

/* Palette Info Section */
.palette-info-section {
    background: rgba(26, 26, 62, 0.4);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--dark-border);
    border-radius: 20px;
    padding: 30px;
    margin-bottom: 30px;
}

.info-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 16px;
}

.info-item {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.info-label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
}

.contrast-info,
.temperature-info {
    font-size: 16px;
    font-weight: 600;
    color: var(--primary);
    padding: 12px;
    background: rgba(102, 126, 234, 0.1);
    border-radius: 8px;
    border-left: 3px solid var(--primary);
}

/* Export Section */
.export-section {
    background: rgba(26, 26, 62, 0.4);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--dark-border);
    border-radius: 20px;
    padding: 30px;
    margin-bottom: 30px;
}

.export-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.export-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 12px;
}

.export-btn {
    padding: 12px 16px;
    background: rgba(26, 26, 62, 0.6);
    border: 1px solid var(--dark-border);
    color: var(--text-primary);
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.export-btn:hover {
    border-color: var(--primary);
    background: rgba(102, 126, 234, 0.15);
    color: var(--primary);
}

/* History Section */
.history-section {
    background: rgba(26, 26, 62, 0.4);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--dark-border);
    border-radius: 20px;
    padding: 30px;
    margin-bottom: 30px;
}

.history-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.history-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(150px, 1fr));
    gap: 12px;
    margin-bottom: 16px;
}

.history-empty {
    grid-column: 1 / -1;
    text-align: center;
    color: var(--text-secondary);
    padding: 20px;
    font-size: 14px;
}

.history-palette {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 2px;
    border-radius: 8px;
    overflow: hidden;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.history-palette:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.history-color {
    height: 40px;
    width: 100%;
}

.clear-history-btn {
    width: 100%;
    padding: 10px 16px;
    background: rgba(255, 107, 107, 0.1);
    border: 1px solid rgba(255, 107, 107, 0.3);
    color: var(--error);
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.clear-history-btn:hover {
    background: rgba(255, 107, 107, 0.2);
    border-color: var(--error);
}

/* Recommendations Section */
.recommendations-section {
    background: rgba(26, 26, 62, 0.4);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border: 1px solid var(--dark-border);
    border-radius: 20px;
    padding: 30px;
    margin-bottom: 30px;
}

.rec-title {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 16px;
    color: var(--text-primary);
}

.rec-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    gap: 12px;
}

.rec-card {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 16px;
    background: rgba(26, 26, 62, 0.6);
    border: 1px solid var(--dark-border);
    border-radius: 12px;
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.3s ease;
}

.rec-card:hover {
    border-color: var(--primary);
    background: rgba(102, 126, 234, 0.15);
    transform: translateY(-2px);
}

.rec-icon {
    font-size: 28px;
}

.rec-name {
    font-size: 13px;
    font-weight: 600;
    text-align: center;
    line-height: 1.3;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(0, 0, 0, 0.7);
    z-index: 2000;
    align-items: center;
    justify-content: center;
    padding: 20px;
}

.modal.active {
    display: flex;
}

.modal-content {
    background: var(--dark-surface);
    border: 1px solid var(--dark-border);
    border-radius: 16px;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    width: 100%;
    max-width: 500px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px;
    border-bottom: 1px solid var(--dark-border);
}

.modal-header h2 {
    font-size: 20px;
    font-weight: 600;
    color: var(--text-primary);
    margin: 0;
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 28px;
    cursor: pointer;
    transition: color 0.2s ease;
    line-height: 1;
}

.modal-close:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 24px;
    overflow-y: auto;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.export-textarea {
    width: 100%;
    height: 200px;
    padding: 12px;
    background: rgba(102, 126, 234, 0.05);
    border: 1px solid var(--dark-border);
    color: var(--text-primary);
    border-radius: 8px;
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 12px;
    resize: vertical;
}

.export-textarea:focus {
    outline: none;
    border-color: var(--primary);
    background: rgba(102, 126, 234, 0.1);
}

.copy-export-btn {
    padding: 10px 16px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--secondary) 100%);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.copy-export-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(102, 126, 234, 0.3);
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(120%);
    background: linear-gradient(135deg, var(--success) 0%, #00a88f 100%);
    color: white;
    padding: 16px 24px;
    border-radius: 8px;
    font-size: 14px;
    font-weight: 600;
    z-index: 3000;
    transition: transform 0.3s ease;
    box-shadow: 0 4px 12px rgba(0, 212, 170, 0.3);
}

.toast.active {
    transform: translateX(-50%) translateY(0);
}

/* Responsive Design */
@media (max-width: 768px) {
    .app-header h1 {
        font-size: 28px;
    }

    .app-container {
        padding: 12px;
    }

    .color-display-section,
    .palette-info-section,
    .export-section,
    .history-section,
    .recommendations-section {
        padding: 20px;
    }

    .color-slots {
        grid-template-columns: repeat(auto-fit, minmax(80px, 1fr));
        gap: 12px;
    }

    .rec-grid {
        grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    }

    .export-buttons {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 480px) {
    .app-header h1 {
        font-size: 24px;
    }

    .subtitle {
        font-size: 14px;
    }

    .app-container {
        padding: 8px;
    }

    .color-display-section,
    .palette-info-section,
    .export-section,
    .history-section,
    .recommendations-section {
        padding: 16px;
        border-radius: 16px;
    }

    .color-slots {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }

    .color-slot {
        height: 100px;
    }

    .control-row {
        flex-direction: column;
        gap: 8px;
    }

    .generate-btn {
        width: 100%;
    }

    .spacebar-hint {
        text-align: center;
        width: 100%;
    }

    .format-buttons {
        gap: 6px;
    }

    .format-btn {
        font-size: 11px;
        padding: 6px 10px;
    }

    .rec-grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .history-grid {
        grid-template-columns: repeat(auto-fill, minmax(120px, 1fr));
    }

    .modal-content {
        max-width: 90vw;
        border-radius: 12px;
    }

    .modal-header,
    .modal-body {
        padding: 16px;
    }
}

/* Print Styles */
@media print {
    .language-selector,
    .ad-container,
    .controls-panel,
    .export-section,
    .recommendations-section,
    .modal {
        display: none;
    }
}

/* Accessibility */
/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 10px;
}

::-webkit-scrollbar-track {
    background: var(--bg-dark, var(--bg-primary, var(--background, #0f0f23)));
}

::-webkit-scrollbar-thumb {
    background: #6c63ff;
    border-radius: 5px;
    border: 2px solid var(--bg-dark, var(--bg-primary, var(--background, #0f0f23)));
}

::-webkit-scrollbar-thumb:hover {
    background: #8982ff;
    opacity: 0.8;
}

/* Selection Color */
::selection {
    background: #6c63ff;
    color: white;
}

::-moz-selection {
    background: #6c63ff;
    color: white;
}

@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus Visible - Accessibility */
button:focus-visible,
a:focus-visible,
input:focus-visible,
[role="button"]:focus-visible {
    outline: 3px solid #667eea;
    outline-offset: 2px;
}