/* style.css - Adaptive Wheel Designer */

:root {
    color-scheme: dark;
    /* Colors */
    --color-bg-dark: #0c0e17;
    --color-bg-surface: #131726;
    --color-bg-input: #090b12;
    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-focus: #00f0ff;

    --color-text-primary: #f1f5f9;
    --color-text-secondary: #94a3b8;
    --color-text-muted: #64748b;
    --color-accent-teal: #00f0ff;
    --color-accent-blue: #3b82f6;

    --color-bg-canvas: #1e2230;
    --color-bg-sheet: #ffffff;
    --color-text-sheet: #0d1117;
    --color-border-sheet: #e2e8f0;

    /* Fonts */
    --font-heading: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-body: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;

    /* Spacing & Sizing */
    --border-radius-sm: 8px;
    --border-radius-md: 14px;
    --border-radius-lg: 20px;
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-normal: 0.3s cubic-bezier(0.4, 0, 0.2, 1);

    /* Mobile */
    --header-height: 56px;
    --bottom-sheet-max: 85vh;
}

:root.light-theme {
    color-scheme: light;
    --color-bg-dark: #f8fafc;
    --color-bg-surface: #ffffff;
    --color-bg-input: #f1f5f9;
    --color-border: rgba(0, 0, 0, 0.08);
    --color-border-focus: #0891b2;

    --color-text-primary: #0d1117;
    --color-text-secondary: #57606a;
    --color-text-muted: #8a92a3;
    --color-accent-teal: #0891b2;
    --color-accent-blue: #2563eb;

    --color-bg-canvas: #f1f5f9;
    --color-bg-sheet: #0d1117;
    --color-text-sheet: #ffffff;
    --color-border-sheet: #30363d;
}

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

body {
    background-color: var(--color-bg-canvas);
    color: var(--color-text-primary);
    font-family: var(--font-body);
    min-height: 100vh;
    transition: background-color var(--transition-normal), color var(--transition-normal);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    text-rendering: optimizeLegibility;
}

/* ================================================
   HEADER
   ================================================ */
.app-header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: var(--header-height);
    background: var(--color-bg-surface);
    border-bottom: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 1rem;
    z-index: 200;
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.2);
    transition: background-color var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.header-left {
    flex: 1;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-accent {
    width: 6px;
    height: 24px;
    background: linear-gradient(180deg, var(--color-accent-teal), var(--color-accent-blue));
    border-radius: 99px;
    box-shadow: 0 0 8px var(--color-accent-teal);
    flex-shrink: 0;
}

.logo-area h1 {
    font-family: var(--font-heading);
    font-weight: 800;
    font-size: 1.05rem;
    letter-spacing: 0.5px;
}

.highlight {
    background: linear-gradient(90deg, var(--color-accent-teal), #60a5fa);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.header-controls {
    display: flex;
    gap: 0.75rem;
    align-items: center;
}

.btn-theme-toggle {
    width: 40px;
    height: 40px;
    background: rgba(0, 240, 255, 0.08);
    border: 1px solid rgba(0, 240, 255, 0.3);
    color: var(--color-accent-teal);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-size: 1rem;
    transition: all var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-theme-toggle:hover {
    background: rgba(0, 240, 255, 0.15);
    border-color: var(--color-accent-teal);
}

.export-buttons-desktop {
    display: flex;
    gap: 0.5rem;
}

/* Header Settings Dropdown */
.header-dropdown-wrapper {
    position: relative;
}

.btn-header-dropdown {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    background: rgba(0, 240, 255, 0.08);
    border: 1px solid rgba(0, 240, 255, 0.3);
    color: var(--color-accent-teal);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

.btn-header-dropdown:hover {
    background: rgba(0, 240, 255, 0.15);
}

.btn-header-dropdown.active {
    background: rgba(0, 240, 255, 0.15);
}

.dropdown-label {
    display: none;
}

.dropdown-chevron {
    font-size: 0.7rem;
    transition: transform var(--transition-fast);
}

.dropdown-chevron.rotated {
    transform: rotate(180deg);
}

.header-dropdown-panel {
    position: absolute;
    top: calc(100% + 8px);
    right: 0;
    background: var(--color-bg-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    min-width: 320px;
    max-height: 85vh;
    overflow-y: auto;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    z-index: 500;
    transform-origin: top right;
    transform: scaleY(0.9) translateY(-6px);
    opacity: 0;
    pointer-events: none;
    transition: all var(--transition-normal);
}

.header-dropdown-panel.open {
    transform: scaleY(1) translateY(0);
    opacity: 1;
    pointer-events: all;
}

.header-dropdown-panel .dropdown-divider {
    height: 1px;
    background: var(--color-border);
    margin: 0;
}

.header-dropdown-panel .dropdown-section {
    padding: 12px 14px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.header-dropdown-panel .dropdown-section-title {
    font-family: var(--font-heading);
    font-size: 0.7rem;
    font-weight: 700;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 0.8px;
    display: flex;
    align-items: center;
    gap: 6px;
    margin: 0;
    padding-bottom: 4px;
}

.btn-dropdown-link {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    padding: 12px 14px;
    background: linear-gradient(135deg, rgba(0, 240, 255, 0.08), rgba(0, 240, 255, 0.04));
    border: 1px solid rgba(0, 240, 255, 0.2);
    color: var(--color-accent-teal);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.95rem;
    text-decoration: none;
    transition: all var(--transition-fast);
}

.btn-dropdown-link:hover {
    background: linear-gradient(135deg, rgba(0, 240, 255, 0.15), rgba(0, 240, 255, 0.1));
    border-color: var(--color-accent-teal);
    transform: translateX(4px);
}

.btn-dropdown-link i:last-child {
    margin-left: auto;
    font-size: 0.8rem;
}

/* Compact preset buttons for header */
.preset-buttons-compact {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.btn-preset-compact {
    display: flex;
    align-items: center;
    gap: 10px;
    width: 100%;
    background: var(--color-bg-input);
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
    padding: 10px 12px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.85rem;
    text-align: left;
    transition: var(--transition-fast);
}

.btn-preset-compact:hover,
.btn-preset-compact:active {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--color-text-secondary);
}

.btn-preset-compact.active {
    background: rgba(0, 240, 255, 0.08);
    border-color: var(--color-accent-teal);
    color: var(--color-accent-teal);
    box-shadow: 0 0 8px rgba(0, 240, 255, 0.12);
}

/* Compact language buttons */
.lang-buttons-compact {
    display: flex;
    gap: 6px;
}

.btn-lang-compact {
    flex: 1;
    background: var(--color-bg-input);
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    padding: 8px 10px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.8rem;
    transition: var(--transition-fast);
    text-align: center;
}

.btn-lang-compact:hover,
.btn-lang-compact:active {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--color-text-secondary);
    color: var(--color-text-primary);
}

.btn-lang-compact.active {
    background: rgba(0, 240, 255, 0.08);
    border-color: var(--color-accent-teal);
    color: var(--color-accent-teal);
    box-shadow: 0 0 8px rgba(0, 240, 255, 0.12);
}

.btn-sm {
    padding: 8px 14px !important;
    font-size: 0.85rem !important;
}

/* ================================================
   DESKTOP LAYOUT (sidebar + canvas)
   ================================================ */
.app-layout {
    display: flex;
    margin-top: var(--header-height);
    height: calc(100vh - var(--header-height));
    margin-left: 380px;
}

/* Desktop Sidebar */
.sidebar-editor {
    position: fixed;
    left: 0;
    top: var(--header-height);
    width: 380px;
    height: calc(100vh - var(--header-height));
    background-color: var(--color-bg-dark);
    border-right: 1px solid var(--color-border);
    display: flex;
    flex-direction: column;
    overflow: hidden;
    box-shadow: 2px 0 10px rgba(0, 0, 0, 0.3);
    z-index: 100;
    transition: background-color var(--transition-normal), border-color var(--transition-normal), box-shadow var(--transition-normal);
}

.editor-header {
    padding: 1rem;
    border-bottom: 1px solid var(--color-border);
    background: var(--color-bg-surface);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.btn-home {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 14px;
    background: rgba(0, 240, 255, 0.08);
    border: 1px solid rgba(0, 240, 255, 0.3);
    color: var(--color-accent-teal);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.9rem;
    text-decoration: none;
    transition: var(--transition-fast);
    width: fit-content;
}

.btn-home:hover {
    background: rgba(0, 240, 255, 0.15);
    border-color: var(--color-accent-teal);
    transform: translateX(-3px);
}

.subtitle-area {
    display: flex;
    align-items: center;
    gap: 8px;
    padding-top: 0.5rem;
    border-top: 1px solid rgba(255, 255, 255, 0.05);
}

.subtitle {
    font-size: 0.75rem;
    color: var(--color-text-secondary);
    letter-spacing: 0.5px;
    text-transform: uppercase;
    margin: 0;
}

.editor-controls {
    flex: 1;
    overflow-y: auto;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.editor-controls::-webkit-scrollbar {
    width: 6px;
}

.editor-controls::-webkit-scrollbar-track {
    background: transparent;
}

.editor-controls::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 99px;
}

.editor-controls::-webkit-scrollbar-thumb:hover {
    background: rgba(255, 255, 255, 0.2);
}

/* Control Groups */
.control-group {
    background-color: var(--color-bg-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-md);
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 10px;
    transition: background-color var(--transition-normal), border-color var(--transition-normal);
}

.control-group h2 {
    font-family: var(--font-heading);
    font-size: 0.95rem;
    font-weight: 700;
    color: #ffffff;
    display: flex;
    align-items: center;
    gap: 8px;
    padding-bottom: 6px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    margin: 0;
}

.section-hint {
    font-size: 0.8rem;
    color: var(--color-text-secondary);
    line-height: 1.4;
    margin: 0;
}

/* Form Styles */
.form-row {
    display: flex;
    gap: 12px;
}

.form-field {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-field label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-text-secondary);
}

.form-field input[type="text"] {
    width: 100%;
    background-color: var(--color-bg-input);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    color: #ffffff;
    padding: 10px 12px;
    font-family: var(--font-body);
    font-size: 0.9rem;
    transition: var(--transition-fast);
}

:root.light-theme .form-field input[type="text"] {
    color: #0d1117;
}

.form-field input[type="text"]:focus {
    border-color: var(--color-border-focus);
    box-shadow: 0 0 6px rgba(0, 240, 255, 0.2);
    outline: none;
}

.color-picker-wrapper {
    display: flex;
    align-items: center;
    background-color: var(--color-bg-input);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    padding: 6px 10px;
    gap: 8px;
}

.color-picker-wrapper input[type="color"] {
    -webkit-appearance: none;
    appearance: none;
    border: none;
    width: 28px;
    height: 28px;
    border-radius: 4px;
    cursor: pointer;
    background: none;
}

.color-picker-wrapper input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}

.color-picker-wrapper input[type="color"]::-webkit-color-swatch {
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 4px;
}

.color-val {
    font-size: 0.8rem;
    font-family: monospace;
    color: var(--color-text-secondary);
    text-transform: uppercase;
}

/* Buttons */
.btn {
    font-family: var(--font-heading);
    font-weight: 700;
    font-size: 0.95rem;
    padding: 12px 16px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition-fast);
    border: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-accent-teal), var(--color-accent-blue));
    color: #0c0e17;
    box-shadow: 0 4px 12px rgba(0, 240, 255, 0.2);
}

.btn-primary:hover {
    box-shadow: 0 6px 16px rgba(0, 240, 255, 0.3);
    filter: brightness(1.05);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-border);
    color: #ffffff;
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    border-color: var(--color-text-secondary);
}

.btn-block {
    width: 100%;
}

/* Preset Buttons */
.preset-buttons {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.btn-preset {
    display: flex;
    align-items: center;
    gap: 12px;
    width: 100%;
    background: var(--color-bg-input);
    border: 1px solid var(--color-border);
    color: var(--color-text-primary);
    padding: 12px 14px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.9rem;
    text-align: left;
    transition: var(--transition-fast);
}

.btn-preset:active,
.btn-preset:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--color-text-secondary);
}

.btn-preset.active {
    background: rgba(0, 240, 255, 0.08);
    border-color: var(--color-accent-teal);
    color: var(--color-accent-teal);
    box-shadow: 0 0 10px rgba(0, 240, 255, 0.15);
}

.swatch {
    width: 16px;
    height: 16px;
    border-radius: 4px;
    border: 1px solid rgba(255, 255, 255, 0.1);
    flex-shrink: 0;
}

.swatch.metropolia {
    background: linear-gradient(135deg, #2bc4c3 50%, #1d4ed8 50%);
}

.swatch.neon {
    background: linear-gradient(135deg, #a855f7 50%, #f43f5e 50%);
}

/* Segments List */
.segments-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 300px;
    overflow-y: auto;
    padding-right: 4px;
}

.segments-list::-webkit-scrollbar {
    width: 6px;
}

.segments-list::-webkit-scrollbar-track {
    background: transparent;
}

.segments-list::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 99px;
}

.segment-row {
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(255, 255, 255, 0.02);
    padding: 8px 10px;
    border-radius: var(--border-radius-sm);
    border: 1px solid rgba(255, 255, 255, 0.03);
}

.seg-num {
    font-size: 0.8rem;
    font-weight: 800;
    color: var(--color-text-muted);
    width: 20px;
    flex-shrink: 0;
    text-align: center;
}

.seg-input {
    flex-grow: 1;
    background: var(--color-bg-input);
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius-sm);
    color: #ffffff;
    padding: 8px 10px;
    font-family: var(--font-body);
    font-size: 0.85rem;
    min-width: 0;
}

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

.seg-color {
    -webkit-appearance: none;
    appearance: none;
    border: none;
    width: 32px;
    height: 32px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    flex-shrink: 0;
}

.seg-color::-webkit-color-swatch-wrapper {
    padding: 0;
}

.seg-color::-webkit-color-swatch {
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 4px;
}

.btn-delete-seg {
    background: transparent;
    border: none;
    color: rgba(239, 68, 68, 0.55);
    cursor: pointer;
    padding: 8px;
    font-size: 0.95rem;
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.btn-delete-seg:active,
.btn-delete-seg:hover {
    color: #ef4444;
    transform: scale(1.15);
}

/* Toggle Switch */
.checkbox-field {
    flex-direction: row;
    align-items: center;
    gap: 12px;
}

.toggle-switch {
    position: relative;
    display: inline-block;
    width: 48px;
    height: 24px;
    flex-shrink: 0;
}

.toggle-switch input {
    opacity: 0;
    width: 0;
    height: 0;
}

.slider-toggle {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background-color: var(--color-bg-input);
    border: 1px solid var(--color-border);
    border-radius: 24px;
    transition: var(--transition-fast);
}

.slider-toggle:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 3px;
    bottom: 3px;
    background-color: var(--color-text-secondary);
    border-radius: 50%;
    transition: var(--transition-fast);
}

.toggle-switch input:checked + .slider-toggle {
    background-color: rgba(0, 240, 255, 0.1);
    border-color: var(--color-accent-teal);
}

.toggle-switch input:checked + .slider-toggle:before {
    transform: translateX(24px);
    background-color: var(--color-accent-teal);
}

.checkbox-label {
    font-size: 0.85rem;
    color: var(--color-text-secondary);
    user-select: none;
}

/* Language Buttons */
.lang-buttons {
    display: flex;
    gap: 6px;
}

.btn-lang {
    flex: 1;
    background: var(--color-bg-input);
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    padding: 10px 12px;
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    font-family: var(--font-heading);
    font-weight: 600;
    font-size: 0.85rem;
    transition: var(--transition-fast);
    text-align: center;
}

.btn-lang:active,
.btn-lang:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--color-text-secondary);
    color: var(--color-text-primary);
}

.btn-lang.active {
    background: rgba(0, 240, 255, 0.08);
    border-color: var(--color-accent-teal);
    color: var(--color-accent-teal);
    box-shadow: 0 0 8px rgba(0, 240, 255, 0.12);
}

/* ================================================
   CANVAS PREVIEW
   ================================================ */
.canvas-preview-container {
    flex: 1;
    overflow: auto;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    background-color: var(--color-bg-canvas);
}

.preview-card-sheet {
    background-color: var(--color-bg-sheet);
    color: var(--color-text-sheet);
    width: 680px;
    height: 680px;
    border-radius: var(--border-radius-md);
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
    padding: 40px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    position: relative;
    border: 1px solid var(--color-border-sheet);
    transition: background-color var(--transition-normal);
}

.vector-wheel-wrapper {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
}

.preview-card-sheet.ink-saver {
    background-color: #ffffff;
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.05);
    border: 1px dashed #cbd5e1;
}

.print-only-header,
.print-only-footer {
    display: none;
}

/* ================================================
   MOBILE EDITOR SHEET
   ================================================ */
.mobile-editor-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, 0.6);
    z-index: 280;
    backdrop-filter: blur(3px);
    -webkit-backdrop-filter: blur(3px);
    margin-top: var(--header-height);
}

.mobile-editor-backdrop.visible {
    display: block;
}

.mobile-editor-sheet {
    display: none;
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    max-height: 80vh;
    background: var(--color-bg-dark);
    border-top: 1px solid var(--color-border);
    border-top-left-radius: 20px;
    border-top-right-radius: 20px;
    z-index: 300;
    flex-direction: column;
    box-shadow: 0 -10px 40px rgba(0, 0, 0, 0.5);
    transform: translateY(100%);
    transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.mobile-editor-sheet.visible {
    display: flex;
    transform: translateY(0);
}

.sheet-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem;
    border-bottom: 1px solid var(--color-border);
    flex-shrink: 0;
}

.sheet-header h3 {
    font-family: var(--font-heading);
    font-size: 1rem;
    font-weight: 700;
    color: #ffffff;
    flex: 1;
    margin: 0;
    text-align: center;
}

.btn-sheet-close {
    width: 40px;
    height: 40px;
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--color-border);
    color: var(--color-text-secondary);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.btn-sheet-close:active,
.btn-sheet-close:hover {
    background: rgba(255, 255, 255, 0.1);
    color: #ffffff;
}

.sheet-content {
    flex: 1;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

.sheet-scroll {
    overflow-y: auto;
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 1.25rem;
}

.sheet-scroll::-webkit-scrollbar {
    width: 6px;
}

.sheet-scroll::-webkit-scrollbar-track {
    background: transparent;
}

.sheet-scroll::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 99px;
}

/* Mobile Edit Button */
.btn-mobile-edit {
    display: none;
    position: absolute;
    bottom: 20px;
    right: 20px;
    width: 56px;
    height: 56px;
    background: linear-gradient(135deg, var(--color-accent-teal), var(--color-accent-blue));
    border: none;
    color: #0c0e17;
    border-radius: 50%;
    cursor: pointer;
    font-size: 1.2rem;
    box-shadow: 0 6px 20px rgba(0, 240, 255, 0.35);
    transition: var(--transition-fast);
    z-index: 150;
}

.btn-mobile-edit:active,
.btn-mobile-edit:hover {
    transform: scale(1.1);
    box-shadow: 0 8px 28px rgba(0, 240, 255, 0.45);
}

/* ================================================
   MOBILE LAYOUT (≤ 768px)
   ================================================ */
@media (max-width: 768px) {
    .app-header {
        padding: 0 0.75rem;
    }

    .logo-area h1 {
        font-size: 0.95rem;
    }

    .dropdown-label {
        display: inline;
    }

    .header-dropdown-panel {
        min-width: calc(100vw - 1.5rem);
        right: 0;
    }

    .sidebar-editor {
        display: none;
        position: relative;
        width: 100%;
        height: auto;
        margin-left: 0;
    }

    .app-layout {
        height: 100%;
        flex-direction: column;
        margin-left: 0;
    }

    .canvas-preview-container {
        padding: 0.75rem;
        position: relative;
    }

    .btn-mobile-edit {
        display: flex;
        align-items: center;
        justify-content: center;
    }

    .preview-card-sheet {
        width: 100%;
        height: auto;
        aspect-ratio: 1;
        max-width: calc(100vw - 1.5rem);
        padding: 1rem;
        border-radius: var(--border-radius-sm);
    }

    /* Control Groups on Mobile */
    .control-group {
        padding: 0.85rem;
        gap: 8px;
    }

    .control-group h2 {
        font-size: 0.88rem;
    }

    .form-row {
        gap: 10px;
    }

    .form-field {
        gap: 5px;
    }

    .form-field label {
        font-size: 0.75rem;
    }

    .form-field input[type="text"] {
        padding: 10px;
        font-size: 16px; /* Prevent zoom on iOS */
    }

    .btn {
        min-height: 44px; /* Mobile touch target */
        padding: 10px 14px;
        font-size: 0.9rem;
    }

    .btn-preset {
        padding: 12px;
        font-size: 0.88rem;
    }

    .preset-buttons {
        gap: 6px;
    }

    .seg-color {
        width: 36px;
        height: 36px;
    }

    .segment-row {
        gap: 6px;
        padding: 10px;
    }

    .segments-list {
        max-height: none;
    }
}

/* ================================================
   PRINT STYLES
   ================================================ */
@media print {
    .app-header,
    .no-print,
    .sidebar-editor {
        display: none !important;
    }

    body {
        background-color: #ffffff !important;
        color: #000000 !important;
    }

    .app-layout {
        margin-top: 0 !important;
        height: auto !important;
        display: block !important;
    }

    .canvas-preview-container {
        background-color: #ffffff !important;
        padding: 0 !important;
        overflow: visible !important;
        height: auto !important;
        display: flex !important;
        align-items: center !important;
        justify-content: center !important;
    }

    .preview-card-sheet {
        width: 190mm;
        height: 190mm;
        max-width: none;
        box-shadow: none !important;
        border: none !important;
        background-color: #ffffff !important;
        -webkit-print-color-adjust: exact !important;
        print-color-adjust: exact !important;
    }

    .print-only-header,
    .print-only-footer {
        display: block !important;
        width: 100%;
    }

    .print-only-header {
        text-align: center;
        margin-bottom: 20px;
        font-family: var(--font-heading);
        font-size: 1.5rem;
        font-weight: 800;
        color: #0d1117;
    }

    .print-only-footer {
        text-align: center;
        margin-top: 20px;
        font-size: 0.8rem;
        color: #64748b;
        border-top: 1px solid #e2e8f0;
        padding-top: 10px;
    }

    @page {
        size: A4 portrait;
        margin: 10mm;
    }
}