/* ==================== CSS Variables ==================== */
:root {
    /* Colors - Neutrals */
    --color-black: #1a1a1a;
    --color-text: #333;
    --color-text-secondary: #666;
    --color-text-muted: #999;
    --color-white: #fff;

    /* Colors - Grays */
    --color-gray-100: #f8f9fa;
    --color-gray-200: #f0f0f0;
    --color-gray-300: #e0e0e0;
    --color-gray-400: var(--color-gray-400);
    --color-gray-500: #999;

    /* Colors - Semantic */
    --color-danger: var(--color-danger);
    --color-danger-dark: var(--color-danger-dark);
    --color-success: var(--color-success);
    --color-accent: var(--color-accent);

    /* Colors - Background */
    --color-bg-page: #e5e5e5;
    --color-bg-card: #fff;
    --color-bg-input: #fff;
    --color-bg-hover: #f8f9fa;

    /* Borders */
    --border-color: #e0e0e0;
    --border-color-dark: var(--color-gray-400);
    --border-radius-sm: 4px;
    --border-radius-md: 8px;
    --border-radius-lg: 16px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 20px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.3);

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.2s ease;
    --transition-slow: 0.3s ease;

    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 40px;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
    background: var(--color-bg-page);
    min-height: 100vh;
    padding: 20px;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    background: var(--color-bg-card);
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

header {
    background: var(--color-black);
    color: var(--color-white);
    padding: 30px 40px;
    display: flex;
    align-items: center;
    gap: 25px;
}

.header-avatar {
    width: 110px;
    height: 110px;
    border-radius: var(--border-radius-lg) 0 var(--border-radius-lg) 0;
    object-fit: cover;
    flex-shrink: 0;
    margin: -15px 0 -15px -10px;
}

.header-content {
    text-align: center;
    flex: 1;
}

.header-about-link {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.1);
    color: rgba(255, 255, 255, 0.6);
    text-decoration: none;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.1rem;
    font-weight: 600;
    transition: all var(--transition-normal);
    flex-shrink: 0;
}

.header-about-link:hover {
    background: rgba(255, 255, 255, 0.2);
    color: var(--color-white);
}

header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

header p {
    opacity: 0.8;
    font-size: 1.1rem;
}

header p.philosophy {
    font-style: italic;
    opacity: 0.6;
    font-size: 0.95rem;
    margin-top: 8px;
}

main {
    padding: 40px;
}

section {
    margin-bottom: 40px;
}

h2 {
    color: var(--color-black);
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--border-color);
}

/* Step done (crossed out) */
.step-done {
    margin-bottom: 30px;
}

.step-done h2 {
    color: var(--color-text-muted);
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 0;
}

/* Back to top button */
.back-to-top {
    position: fixed;
    bottom: 20px;
    right: 20px;
    width: 44px;
    height: 44px;
    background: var(--color-text);
    color: var(--color-white);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    font-size: 1.2rem;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
    z-index: 100;
}

.back-to-top:hover {
    background: var(--color-black);
    transform: translateY(-3px);
}

h3 {
    color: var(--color-text);
    margin-bottom: 15px;
    font-size: 1.1rem;
}

/* Editor Controls */
.editor-controls {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 20px;
    margin-bottom: 30px;
}

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

.control-group label {
    font-weight: 600;
    color: var(--color-text);
    font-size: 0.9rem;
}

.control-group input[type="text"],
.control-group select {
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-md);
    font-size: 1rem;
    transition: border-color var(--transition-slow);
}

.control-group input[type="text"]:focus,
.control-group select:focus {
    outline: none;
    border-color: var(--color-text);
}

/* Custom Font Selector */
.control-group-font {
    position: relative;
}

.font-selector {
    position: relative;
}

.font-selector-display {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-md);
    background: var(--color-bg-card);
    cursor: pointer;
    transition: border-color var(--transition-slow);
    font-size: 1.1rem;
}

.font-selector-display:hover {
    border-color: var(--color-text);
}

.font-selector.open .font-selector-display {
    border-color: var(--color-text);
    border-bottom-left-radius: 0;
    border-bottom-right-radius: 0;
}

.font-selector-display svg {
    transition: transform 0.2s;
    color: var(--color-text-secondary);
}

.font-selector.open .font-selector-display svg {
    transform: rotate(180deg);
}

.font-dropdown {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    min-width: 100%;
    width: max-content;
    max-width: 500px;
    background: var(--color-bg-card);
    border: 2px solid var(--color-text);
    border-top: none;
    border-radius: 0 0 8px 8px;
    z-index: 100;
    max-height: 400px;
    overflow: hidden;
    flex-direction: column;
}

.font-selector.open .font-dropdown {
    display: flex;
}

#fontSearch {
    padding: 12px;
    border: none;
    border-bottom: 1px solid var(--border-color);
    font-size: 0.95rem;
    outline: none;
}

.font-list {
    overflow-y: auto;
    overflow-x: hidden;
    max-height: 340px;
}

.font-category {
    padding: 8px 12px;
    background: var(--color-gray-100);
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.5px;
    position: sticky;
    top: 0;
}

.font-option {
    display: flex;
    align-items: center;
    padding: 8px 12px;
    cursor: pointer;
    transition: background var(--transition-fast);
    border-bottom: 1px solid var(--color-gray-200);
}

.font-option:hover {
    background: var(--color-gray-100);
}

.font-option.selected {
    background: var(--color-text);
    color: var(--color-white);
}

.font-name {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    flex-shrink: 0;
    width: 130px;
}

.font-option.selected .font-name {
    color: rgba(255, 255, 255, 0.8);
}

.font-preview {
    font-size: 1.4rem;
    white-space: nowrap;
    padding-left: 10px;
}

.font-option.hidden,
.font-category.hidden {
    display: none;
}

.control-group input[type="range"] {
    width: 100%;
    height: 8px;
    border-radius: var(--border-radius-sm);
    background: var(--border-color);
    cursor: pointer;
}

.control-group input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 20px;
    height: 20px;
    background: var(--color-text);
    border-radius: 50%;
    cursor: pointer;
}

.control-group input[type="color"] {
    width: 60px;
    height: 40px;
    border: none;
    border-radius: var(--border-radius-md);
    cursor: pointer;
}

.bg-options {
    display: flex;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.bg-options label {
    display: flex;
    align-items: center;
    gap: 5px;
    font-weight: normal;
    cursor: pointer;
}

/* Multi-line Editor */
.lines-editor {
    background: var(--color-bg-hover);
    padding: 20px;
    border-radius: var(--border-radius-lg);
    margin-bottom: 25px;
}

.line-editor {
    background: var(--color-bg-card);
    border: 2px solid var(--border-color);
    border-radius: 10px;
    padding: 15px;
    margin-bottom: 15px;
}

.line-editor:last-of-type {
    margin-bottom: 0;
}

.line-editor-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.line-label {
    font-weight: 600;
    color: var(--color-text-secondary);
    font-size: 0.85rem;
    min-width: 50px;
}

.line-text-input {
    flex: 1;
    padding: 10px 14px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-md);
    font-size: 1rem;
    transition: border-color 0.2s;
}

.line-text-input:focus {
    outline: none;
    border-color: var(--color-text);
}

.line-remove-btn {
    width: 32px;
    height: 32px;
    background: var(--color-danger);
    color: var(--color-white);
    border: none;
    border-radius: 6px;
    font-size: 18px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.line-remove-btn:hover {
    background: var(--color-danger-dark);
}

.line-controls {
    display: flex;
    gap: 20px;
    margin-bottom: 12px;
    flex-wrap: wrap;
}

.line-control {
    display: flex;
    align-items: center;
    gap: 10px;
}

.line-control label {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    min-width: 50px;
}

.line-control input[type="range"] {
    width: 120px;
    height: 6px;
    border-radius: 3px;
    background: var(--border-color);
    cursor: pointer;
}

.line-control input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    background: var(--color-text);
    border-radius: 50%;
    cursor: pointer;
}

.line-control span {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    min-width: 45px;
}

.line-control select {
    padding: 4px 8px;
    font-size: 0.85rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    background: var(--color-bg-input);
    cursor: pointer;
}

.add-line-btn {
    width: 100%;
    padding: 12px;
    background: transparent;
    border: 2px dashed var(--color-gray-400);
    border-radius: var(--border-radius-md);
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    margin-top: 15px;
}

.add-line-btn:hover {
    border-color: var(--color-text);
    color: var(--color-text);
    background: var(--color-gray-100);
}

/* Alignment Options */
.align-options {
    display: flex;
    gap: 8px;
}

.align-options label {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 40px;
    height: 36px;
    border: 2px solid var(--border-color);
    border-radius: 6px;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.align-options label:hover {
    border-color: var(--color-text-muted);
}

.align-options input[type="radio"] {
    display: none;
}

.align-options input[type="radio"]:checked + svg {
    color: var(--color-white);
}

.align-options label:has(input:checked) {
    background: var(--color-text);
    border-color: var(--color-text);
}

.align-options svg {
    color: var(--color-text-secondary);
}

/* Letter Editor (legacy) */
.letter-editor {
    background: var(--color-bg-hover);
    padding: 25px;
    border-radius: var(--border-radius-lg);
}

.letter-editor .hint {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    margin-bottom: 15px;
}

/* Saved Configs */
.saved-configs {
    background: var(--color-bg-hover);
    padding: 25px;
    border-radius: var(--border-radius-lg);
    margin-top: 20px;
}

.saved-configs-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: 15px;
}

.saved-configs-header h3 {
    margin: 0;
}

.btn-save {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--color-text);
    color: var(--color-white);
    border: none;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    font-size: 0.9rem;
    transition: background 0.2s;
}

.btn-save:hover {
    background: var(--color-accent);
}

.saved-configs-list {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
}

.no-configs {
    color: var(--color-text-muted);
    font-size: 0.9rem;
    font-style: italic;
}

.saved-config-item {
    position: relative;
    background: var(--color-bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: 8px;
    cursor: pointer;
    transition: all var(--transition-normal);
}

.saved-config-item:hover {
    border-color: var(--color-text);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.saved-config-item canvas {
    display: block;
    border-radius: var(--border-radius-sm);
}

.saved-config-delete {
    position: absolute;
    top: -8px;
    right: -8px;
    width: 24px;
    height: 24px;
    background: var(--color-danger);
    color: var(--color-white);
    border: 2px solid var(--color-white);
    border-radius: 50%;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: bold;
    opacity: 0;
    transition: opacity 0.2s;
}

.saved-config-item:hover .saved-config-delete {
    opacity: 1;
}

.saved-config-delete:hover {
    background: var(--color-danger-dark);
}

.letter-buttons {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
}

.letter-btn {
    width: 50px;
    height: 50px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-md);
    font-size: 1.5rem;
    font-weight: bold;
    cursor: pointer;
    transition: all var(--transition-normal);
    background: var(--color-bg-card);
}

.letter-btn:hover {
    transform: scale(1.1);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.letter-btn.has-custom-color {
    border-color: currentColor;
    border-width: 3px;
}

/* Preview Section */
.preview-container {
    display: grid;
    gap: 30px;
}

.preview-main {
    background: var(--color-gray-200);
    border-radius: var(--border-radius-lg);
    overflow: hidden;
}

.preview-bg-toggle {
    display: flex;
    padding: 10px;
    gap: 10px;
    background: var(--border-color);
}

.bg-toggle {
    padding: 8px 16px;
    border: none;
    background: transparent;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: all var(--transition-normal);
}

.bg-toggle.active {
    background: var(--color-bg-card);
    box-shadow: var(--shadow-sm);
}

.main-preview {
    position: relative;
    padding: 40px;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 300px;
}

.main-preview.light {
    background: var(--color-bg-card);
}

.main-preview.dark {
    background: var(--color-black);
}

.main-preview.checker {
    background-image:
        linear-gradient(45deg, var(--color-gray-400) 25%, transparent 25%),
        linear-gradient(-45deg, var(--color-gray-400) 25%, transparent 25%),
        linear-gradient(45deg, transparent 75%, var(--color-gray-400) 75%),
        linear-gradient(-45deg, transparent 75%, var(--color-gray-400) 75%);
    background-size: 20px 20px;
    background-position: 0 0, 0 10px, 10px -10px, -10px 0px;
}

#logoCanvas {
    max-width: 100%;
    height: auto;
}

#logoSvg {
    max-width: 100%;
    height: auto;
    position: relative;
    z-index: 1;
}

/* Grid Toggle Button */
.toggle-separator {
    width: 1px;
    height: 20px;
    background: var(--border-color);
    margin: 0 5px;
}

.grid-toggle {
    padding: 8px 12px;
    border: none;
    border-radius: 6px;
    background: var(--color-gray-200);
    color: var(--color-text-secondary);
    cursor: pointer;
    transition: all var(--transition-normal);
    display: flex;
    align-items: center;
    justify-content: center;
}

.grid-toggle:hover {
    background: var(--border-color);
}

.grid-toggle.active {
    background: var(--color-text);
    color: var(--color-white);
}

/* Preview Grid Overlay */
.preview-grid {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    pointer-events: none;
    opacity: 0;
    transition: opacity 0.2s;
    z-index: 2;
}

.preview-grid.show {
    opacity: 1;
}

.preview-grid::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        /* Center lines */
        linear-gradient(to right, var(--grid-center-color) 1px, transparent 1px),
        linear-gradient(to bottom, var(--grid-center-color) 1px, transparent 1px),
        /* Grid lines */
        linear-gradient(to right, var(--grid-line-color) 1px, transparent 1px),
        linear-gradient(to bottom, var(--grid-line-color) 1px, transparent 1px);
    background-size:
        100% 100%,
        100% 100%,
        20px 20px,
        20px 20px;
    background-position:
        50% 0,
        0 50%,
        0 0,
        0 0;
}

/* Grid colors for light background */
.main-preview.light {
    --grid-center-color: rgba(0, 0, 0, 0.4);
    --grid-line-color: rgba(0, 0, 0, 0.1);
}

/* Grid colors for dark background */
.main-preview.dark {
    --grid-center-color: rgba(255, 255, 255, 0.5);
    --grid-line-color: rgba(255, 255, 255, 0.15);
}

/* Grid colors for checker background */
.main-preview.checker {
    --grid-center-color: rgba(0, 0, 0, 0.5);
    --grid-line-color: rgba(0, 0, 0, 0.15);
}

/* Size Previews */
.size-previews {
    display: flex;
    flex-wrap: wrap;
    gap: 20px;
    align-items: flex-end;
}

.size-preview {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.size-preview canvas {
    background: var(--color-bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
}

.size-preview span {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
}

/* Favicon Preview */
.favicon-preview {
    margin-top: 20px;
}

.browser-tab {
    background: var(--color-gray-200);
    border-radius: 8px 8px 0 0;
    padding: 10px 10px 0;
    max-width: 400px;
}

.tab-bar {
    display: flex;
    gap: 5px;
}

.tab {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 15px;
    background: var(--border-color);
    border-radius: 8px 8px 0 0;
    font-size: 0.85rem;
    color: var(--color-text-secondary);
}

.tab.active {
    background: var(--color-bg-card);
    color: var(--color-text);
}

.tab canvas {
    border-radius: 2px;
}

/* App Icon Preview */
.app-icon-preview {
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid var(--border-color);
}

.app-icon-controls {
    display: flex;
    gap: 20px;
    flex-wrap: wrap;
    margin-bottom: 20px;
    align-items: center;
}

.app-icon-control {
    display: flex;
    align-items: center;
    gap: 8px;
}

.app-icon-control label {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
}

.app-icon-control input[type="color"] {
    width: 40px;
    height: 30px;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
}

.app-icon-control input[type="checkbox"] {
    width: 16px;
    height: 16px;
    cursor: pointer;
}

.app-icon-previews {
    display: flex;
    gap: 30px;
    flex-wrap: wrap;
}

.app-icon-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

.app-icon-item canvas {
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
}

#appIconIOS {
    border-radius: 22%;
}

#appIconAndroid {
    border-radius: 15%;
}

.app-icon-item span {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    font-weight: 500;
}

/* Export Section */
.export-section {
    background: linear-gradient(135deg, var(--color-gray-100) 0%, var(--color-gray-300) 100%);
    padding: 30px;
    border-radius: var(--border-radius-lg);
    text-align: center;
}

.export-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 15px;
    margin: 20px 0;
}

.export-list li {
    background: var(--color-bg-card);
    padding: 10px 20px;
    border-radius: 20px;
    font-size: 0.9rem;
    color: var(--color-text);
}

.generate-btn {
    background: var(--color-text);
    color: var(--color-white);
    border: none;
    padding: 16px 40px;
    font-size: 1.2rem;
    font-weight: 600;
    border-radius: 30px;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s;
}

.generate-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.25);
}

.generate-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
}

.progress-bar {
    margin-top: 20px;
    background: var(--border-color);
    border-radius: 10px;
    height: 20px;
    overflow: hidden;
    position: relative;
}

.progress-fill {
    height: 100%;
    background: var(--color-text);
    width: 0%;
    transition: width 0.3s;
}

.progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-text);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    justify-content: center;
    align-items: center;
    z-index: 1000;
}

.modal.show {
    display: flex;
}

.modal-content {
    background: var(--color-bg-card);
    padding: 30px;
    border-radius: var(--border-radius-lg);
    text-align: center;
    min-width: 320px;
}

.modal-content h3 {
    margin-bottom: 20px;
}

.color-picker-row {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
    margin-bottom: 15px;
}

.modal-content input[type="color"] {
    width: 80px;
    height: 80px;
    border: none;
    border-radius: var(--border-radius-lg);
    cursor: pointer;
}

.hex-input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.hex-input-group input[type="text"] {
    width: 100px;
    padding: 10px;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-md);
    font-family: monospace;
    font-size: 1rem;
    text-transform: uppercase;
    text-align: center;
}

.hex-input-group input[type="text"]:focus {
    outline: none;
    border-color: var(--color-text);
}

.btn-row {
    display: flex;
    gap: 5px;
    justify-content: center;
}

.btn-icon {
    width: 36px;
    height: 36px;
    border: 2px solid var(--border-color);
    background: var(--color-bg-card);
    border-radius: var(--border-radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-normal);
    color: var(--color-text-secondary);
}

.btn-icon:hover {
    border-color: var(--color-text);
    color: var(--color-text);
}

.btn-icon.copied {
    border-color: var(--color-success);
    color: var(--color-success);
}

.hex-input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    align-items: center;
}

.hex-input-group > div {
    display: flex;
    gap: 5px;
}

.clipboard-color {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    padding: 10px;
    background: var(--color-bg-hover);
    border-radius: var(--border-radius-md);
    margin-bottom: 15px;
    font-size: 0.9rem;
}

.color-preview {
    width: 24px;
    height: 24px;
    border-radius: var(--border-radius-sm);
    border: 1px solid var(--border-color);
}

.modal-buttons {
    display: flex;
    gap: 10px;
    justify-content: center;
}

.btn-primary, .btn-secondary {
    padding: 10px 20px;
    border: none;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    font-size: 0.9rem;
    transition: opacity 0.2s;
}

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

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

.btn-primary:hover, .btn-secondary:hover {
    opacity: 0.8;
}

.toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--color-text);
    color: var(--color-white);
    padding: 12px 24px;
    border-radius: var(--border-radius-md);
    font-size: 0.9rem;
    z-index: 2000;
    animation: toastIn 0.3s ease;
}

@keyframes toastIn {
    from {
        opacity: 0;
        transform: translateX(-50%) translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) translateY(0);
    }
}

/* Footer */
footer {
    background: var(--color-bg-hover);
    padding: 20px;
    text-align: center;
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    display: flex;
    flex-direction: row;
    justify-content: center;
    align-items: center;
    gap: 12px;
}

footer .github-link {
    color: var(--color-text-secondary);
    transition: color 0.2s;
    display: flex;
}

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

/* Responsive */
@media (max-width: 768px) {
    body {
        padding: 10px;
    }

    main {
        padding: 20px;
    }

    header h1 {
        font-size: 1.8rem;
    }

    .editor-controls {
        grid-template-columns: 1fr;
    }

    .letter-btn {
        width: 40px;
        height: 40px;
        font-size: 1.2rem;
    }
}

/* ==================== Font Popover Fullscreen ==================== */
.font-popover {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: var(--color-bg-card);
    z-index: 3000;
    display: none;
    flex-direction: column;
    opacity: 0;
    transition: opacity 0.3s ease;
}

.font-popover.show {
    display: flex;
    opacity: 1;
}

.font-popover-header {
    background: var(--color-black);
    color: var(--color-white);
    padding: 20px 30px;
    flex-shrink: 0;
}

.font-popover-title {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.font-popover-title h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

.btn-close {
    background: rgba(255, 255, 255, 0.1);
    border: none;
    color: var(--color-white);
    width: 40px;
    height: 40px;
    border-radius: var(--border-radius-md);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.2s;
}

.btn-close:hover {
    background: rgba(255, 255, 255, 0.2);
}

.font-popover-current {
    display: flex;
    align-items: center;
    gap: 20px;
    margin-bottom: 20px;
    padding: 15px 20px;
    background: var(--color-bg-card);
    border-radius: var(--border-radius-lg);
}

.current-label {
    font-size: 0.9rem;
    color: var(--color-text-secondary);
    flex-shrink: 0;
}

.current-label strong {
    color: var(--color-text);
}

.current-preview {
    flex: 1;
    font-size: 2rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.font-popover-controls {
    display: flex;
    gap: 20px;
    align-items: center;
    flex-wrap: wrap;
}

.font-popover-search {
    flex: 1;
    min-width: 200px;
    max-width: 400px;
}

.font-popover-search input {
    width: 100%;
    padding: 12px 16px;
    border: none;
    border-radius: var(--border-radius-md);
    font-size: 1rem;
    background: rgba(255, 255, 255, 0.9);
    color: var(--color-text);
}

.font-popover-search input:focus {
    outline: none;
    background: var(--color-bg-card);
    box-shadow: 0 0 0 3px rgba(0, 0, 0, 0.2);
}

.font-popover-spacing {
    display: flex;
    align-items: center;
    gap: 10px;
    color: var(--color-white);
}

.font-popover-spacing label {
    font-size: 0.9rem;
    opacity: 0.8;
}

.font-popover-spacing input[type="range"] {
    width: 150px;
    height: 6px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.3);
    cursor: pointer;
    -webkit-appearance: none;
}

.font-popover-spacing input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--color-bg-card);
    cursor: pointer;
}

.font-popover-spacing span {
    font-size: 0.9rem;
    min-width: 50px;
}

.font-popover-grid {
    flex: 1;
    overflow-y: auto;
    padding: 30px;
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
    align-content: start;
}

.font-card {
    background: var(--color-bg-hover);
    border-radius: var(--border-radius-lg);
    padding: 20px;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
}

.font-card:hover {
    background: var(--color-bg-card);
    border-color: var(--color-text);
    box-shadow: var(--shadow-md);
}

.font-card.selected {
    background: var(--color-text);
    border-color: var(--color-text);
}

.font-card.selected .font-card-name {
    color: rgba(255, 255, 255, 0.8);
}

.font-card-name {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    margin-bottom: 10px;
    font-weight: 500;
}

.font-card-preview {
    font-size: 1.8rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    min-height: 2.2em;
    display: flex;
    align-items: center;
}

.font-card.hidden {
    display: none;
}

/* About Section */
.about-section {
    background: var(--color-bg-hover);
    padding: 60px 40px;
    border-top: 1px solid var(--border-color);
}

.about-content {
    max-width: 800px;
    margin: 0 auto;
}

.about-content h2 {
    font-size: 1.8rem;
    color: var(--color-black);
    margin-bottom: 30px;
    border-bottom: none;
    padding-bottom: 0;
}

.about-content h3 {
    font-size: 1.2rem;
    color: var(--color-text);
    margin-top: 30px;
    margin-bottom: 15px;
}

.about-content p {
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 15px;
    font-size: 1rem;
}

.about-content ul {
    list-style: none;
    margin: 15px 0;
    padding: 0;
}

.about-content ul li {
    color: var(--color-text-secondary);
    line-height: 1.7;
    padding-left: 20px;
    position: relative;
    margin-bottom: 8px;
}

.about-content ul li::before {
    content: '—';
    position: absolute;
    left: 0;
    color: var(--color-text-muted);
}

.about-content em {
    font-style: italic;
    color: var(--color-text-secondary);
}

.about-content strong {
    font-weight: 600;
    color: var(--color-text);
}

.about-content hr {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 40px 0;
}

/* ==================== Mobile Message ==================== */
.mobile-message {
    display: none;
}

@media (max-width: 768px) {
    .container,
    .modal,
    .font-popover,
    .back-to-top {
        display: none !important;
    }

    .mobile-message {
        display: flex;
        flex-direction: column;
        justify-content: center;
        align-items: center;
        min-height: 100vh;
        padding: 40px 30px;
        text-align: center;
        background: var(--color-black);
        color: var(--color-white);
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        bottom: 0;
        z-index: 10000;
    }

    .mobile-message p {
        margin: 12px 0;
        font-size: 18px;
        line-height: 1.5;
        max-width: 320px;
    }

    .mobile-message .mobile-avatar {
        width: 85px;
        height: 85px;
        border-radius: 50%;
        object-fit: cover;
        margin-top: 30px;
    }

    .mobile-message .mobile-github-link {
        display: block;
        margin-top: 20px;
        color: var(--color-text-secondary);
        transition: color 0.2s;
    }

    .mobile-message .mobile-github-link:hover {
        color: var(--color-text-primary);
    }

    .mobile-message .mobile-hook {
        font-size: 24px;
        font-weight: 600;
        margin-bottom: 5px;
    }

    .mobile-message .mobile-shout {
        font-size: 14px;
        color: var(--color-text-muted);
        font-style: italic;
        margin-top: 0;
        margin-bottom: 30px;
    }

    .mobile-message strong {
        color: var(--color-white);
        font-size: 20px;
    }

    .mobile-message .mobile-footer {
        margin-top: 30px;
        font-size: 14px;
        color: var(--color-text-muted);
    }

    .mobile-message .mobile-bookmark-link {
        color: var(--color-white);
        text-decoration: underline;
        cursor: pointer;
    }

    .mobile-bookmark-popover {
        display: none;
        flex-direction: row;
        gap: 10px;
        padding: 12px;
        background: rgba(255, 255, 255, 0.15);
        border-radius: var(--border-radius-md);
        position: absolute;
        top: 50%;
        left: 50%;
        transform: translate(-50%, -50%);
        z-index: 10001;
    }

    .mobile-bookmark-popover.visible {
        display: flex;
    }

    .mobile-bookmark-popover button {
        padding: 10px 20px;
        border: none;
        border-radius: var(--border-radius-sm);
        background: var(--color-white);
        color: var(--color-black);
        font-size: 14px;
        font-weight: 500;
        cursor: pointer;
        white-space: nowrap;
    }

    .mobile-bookmark-popover button:active {
        transform: scale(0.95);
    }
}