/* Material Design Iframe Generator Styles */
:root {
    /* Material Design 3 Color Tokens - Dark Theme (Default) */
    --md-primary: #d0bcff;
    --md-primary-container: #4f378b;
    --md-on-primary: #371e73;
    --md-on-primary-container: #eaddff;
    
    --md-surface: #141218;
    --md-surface-variant: #49454f;
    --md-surface-container: #1d1b20;
    --md-surface-container-high: #272529;
    --md-surface-container-highest: #322f35;
    
    --md-on-surface: #e6e0e9;
    --md-on-surface-variant: #cac4d0;
    --md-outline: #938f99;
    --md-outline-variant: #49454f;
    
    --md-success: #4caf50;
    --md-error: #f44336;
    --md-warning: #ff9800;
    
    /* Spacing */
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    
    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-size-xs: 12px;
    --font-size-sm: 14px;
    --font-size-md: 16px;
    --font-size-lg: 18px;
    --font-size-xl: 24px;
    --font-size-2xl: 32px;
    
    /* Shadows */
    --elevation-1: 0 1px 3px rgba(0,0,0,0.4), 0 1px 2px rgba(0,0,0,0.3);
    --elevation-2: 0 3px 6px rgba(0,0,0,0.5), 0 3px 6px rgba(0,0,0,0.4);
    --elevation-3: 0 10px 20px rgba(0,0,0,0.6), 0 6px 6px rgba(0,0,0,0.5);
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 16px;
    --radius-full: 9999px;
    
    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-medium: 250ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 350ms cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Focus Ring */
    --focus-ring: rgba(208, 188, 255, 0.3);
}

/* Light Theme Override */
[data-theme="light"] {
    --md-primary: #6750a4;
    --md-primary-container: #eaddff;
    --md-on-primary: #ffffff;
    --md-on-primary-container: #21005d;
    
    --md-surface: #fef7ff;
    --md-surface-variant: #e7e0ec;
    --md-surface-container: #f3edf7;
    --md-surface-container-high: #ece6f0;
    --md-surface-container-highest: #e6e0e9;
    
    --md-on-surface: #1d1b20;
    --md-on-surface-variant: #49454f;
    --md-outline: #79747e;
    --md-outline-variant: #cac4d0;
    
    /* Adjust shadows for light theme */
    --elevation-1: 0 1px 3px rgba(0,0,0,0.12), 0 1px 2px rgba(0,0,0,0.24);
    --elevation-2: 0 3px 6px rgba(0,0,0,0.16), 0 3px 6px rgba(0,0,0,0.23);
    --elevation-3: 0 10px 20px rgba(0,0,0,0.19), 0 6px 6px rgba(0,0,0,0.23);
    
    /* Focus Ring */
    --focus-ring: rgba(103, 80, 164, 0.2);
}

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

body {
    font-family: var(--font-family);
    font-size: var(--font-size-md);
    line-height: 1.5;
    color: var(--md-on-surface);
    background-color: var(--md-surface);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Layout */
.app-container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* Back Button */
.back-button-container {
    position: sticky;
    top: 0;
    z-index: 100;
    background: var(--md-surface-container);
    margin: -40px -20px 20px;
    padding: 20px 20px 10px 40px;
    border-bottom: 1px solid var(--md-outline-variant);
    box-shadow: var(--elevation-3);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
}

.btn-back {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--md-surface-container-high);
    border: 2px solid var(--md-outline-variant);
    border-radius: 8px;
    color: var(--md-on-surface);
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
}

.btn-back:hover {
    background: var(--md-surface-container-highest);
    border-color: var(--md-primary);
    transform: translateX(-5px);
}

.btn-back .material-icons {
    font-size: 18px;
}

.header {
    background: var(--md-surface-container);
    border-bottom: 1px solid var(--md-outline-variant);
    padding: var(--spacing-lg) var(--spacing-xl);
}

.header-content {
    max-width: 1400px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-left {
    flex: 1;
}

.header-title {
    font-size: var(--font-size-2xl);
    font-weight: 600;
    color: var(--md-on-surface);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.header-title .material-icons {
    font-size: 32px;
    color: var(--md-primary);
}

.header-subtitle {
    font-size: var(--font-size-md);
    color: var(--md-on-surface-variant);
    font-weight: 400;
}

/* Theme Toggle Button */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    padding: 12px;
    background: var(--md-surface-container-high);
    border: 1px solid var(--md-outline-variant);
    border-radius: 24px;
    cursor: pointer;
    transition: all 0.2s ease;
    box-shadow: var(--elevation-1);
    flex-shrink: 0;
}

.theme-toggle:hover {
    background: var(--md-surface-container-highest);
    border-color: var(--md-primary);
    box-shadow: var(--elevation-2);
    transform: scale(1.05);
}

.theme-toggle:active {
    transform: scale(0.98);
}

.theme-toggle:focus-visible {
    outline: 2px solid var(--md-primary);
    outline-offset: 2px;
}

.theme-toggle .material-icons {
    font-size: 24px;
    color: var(--md-on-surface);
    transition: color 0.2s ease;
}

/* ==========================================
   MAIN LAYOUT - 3 COLUMN GRID + FULL WIDTH PREVIEW
   ========================================== */
.main-layout {
    flex: 1;
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-xl);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xl);
}

/* 3-Column Controls Grid */
.controls-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-md);
}

.control-column {
    background: var(--md-surface-container);
    border-radius: var(--radius-xl);
    border: 1px solid var(--md-outline-variant);
    box-shadow: var(--elevation-1);
    overflow: hidden;
}

.control-column .control-section {
    padding: var(--spacing-lg);
    margin: 0;
    background: transparent;
    border-radius: 0;
    border: none;
    box-shadow: none;
}

/* Action Buttons - Centered */
.action-buttons {
    display: flex;
    justify-content: center;
    margin-bottom: var(--spacing-lg);
}

/* Controls Panel - Remove old styles */
.controls-panel {
    background: var(--md-surface-container);
    border-radius: var(--radius-xl);
    border: 1px solid var(--md-outline-variant);
    height: fit-content;
    box-shadow: var(--elevation-1);
}

.panel-content {
    padding: var(--spacing-lg);
}

.control-section {
    margin-bottom: var(--spacing-xl);
}

.control-section:last-child {
    margin-bottom: 0;
}

.section-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--md-on-surface);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-sm);
    border-bottom: 1px solid var(--md-outline-variant);
}

.section-title .material-icons {
    font-size: 20px;
    color: var(--md-primary);
}

.control-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* Input Fields */
.input-field {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.input-label {
    font-size: var(--font-size-sm);
    font-weight: 500;
    color: var(--md-on-surface-variant);
    margin-bottom: var(--spacing-xs);
}

.input-with-select {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--spacing-sm);
    align-items: end;
}

/* Number Input */
.number-input {
    background: var(--md-surface-container-highest);
    border: 1px solid var(--md-outline-variant);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    font-size: var(--font-size-md);
    color: var(--md-on-surface);
    font-family: var(--font-family);
    transition: all var(--transition-fast);
    outline: none;
}

.number-input:focus {
    border-color: var(--md-primary);
    box-shadow: 0 0 0 2px var(--focus-ring);
}

.number-input:hover {
    border-color: var(--md-on-surface-variant);
}

/* Modern Select */
.select-wrapper {
    position: relative;
    min-width: 80px;
}

.modern-select {
    appearance: none;
    background: var(--md-surface-container-highest);
    border: 1px solid var(--md-outline-variant);
    border-radius: var(--radius-sm);
    padding: 12px 40px 12px 16px;
    font-size: var(--font-size-md);
    color: var(--md-on-surface);
    font-family: var(--font-family);
    cursor: pointer;
    transition: all var(--transition-fast);
    outline: none;
    width: 100%;
}

.modern-select:focus {
    border-color: var(--md-primary);
    box-shadow: 0 0 0 2px var(--focus-ring);
}

.modern-select:hover {
    border-color: var(--md-on-surface-variant);
}

.select-arrow {
    position: absolute;
    right: 12px;
    top: 50%;
    transform: translateY(-50%);
    pointer-events: none;
    color: var(--md-on-surface-variant);
    font-size: 20px;
    transition: transform var(--transition-fast);
}

.select-wrapper:focus-within .select-arrow {
    transform: translateY(-50%) rotate(180deg);
    color: var(--md-primary);
}

/* Material Design Switch */
.switch-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.switch-field {
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    padding: var(--spacing-sm) 0;
}

.switch-label {
    font-size: var(--font-size-md);
    color: var(--md-on-surface);
    font-weight: 400;
}

.switch {
    position: relative;
    width: 52px;
    height: 32px;
    background: var(--md-outline);
    border-radius: var(--radius-full);
    transition: background-color var(--transition-medium);
}

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

.switch-slider {
    position: absolute;
    top: 2px;
    left: 2px;
    width: 28px;
    height: 28px;
    background: var(--md-surface-container-highest);
    border-radius: var(--radius-full);
    transition: all var(--transition-medium);
    box-shadow: var(--elevation-1);
}

.switch-input:checked + .switch-slider {
    transform: translateX(20px);
    background: var(--md-on-primary);
}

.switch-input:checked + .switch-slider::before {
    background: var(--md-primary);
}

.switch-input:focus + .switch-slider {
    box-shadow: var(--elevation-2), 0 0 0 2px var(--focus-ring);
}

.switch-input:checked ~ .switch {
    background: var(--md-primary);
}

.switch-field:hover .switch {
    background: var(--md-on-surface-variant);
}

.switch-field:hover .switch-input:checked ~ .switch {
    background: var(--md-primary);
}

/* Buttons */
.primary-button {
    background: var(--md-primary);
    color: var(--md-on-primary);
    border: none;
    border-radius: var(--radius-xl);
    padding: 16px 24px;
    font-size: var(--font-size-md);
    font-weight: 500;
    font-family: var(--font-family);
    cursor: pointer;
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-fast);
    box-shadow: var(--elevation-2);
    width: fit-content;
    justify-content: center;
    min-width: 200px;
}

.primary-button:hover {
    background: color-mix(in srgb, var(--md-primary) 90%, white);
    box-shadow: var(--elevation-3);
    transform: translateY(-1px);
}

.primary-button:active {
    transform: translateY(0);
    box-shadow: var(--elevation-1);
}

.action-buttons {
    margin-top: var(--spacing-xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--md-outline-variant);
}

/* Preview Panel */
.preview-panel {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.preview-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid var(--md-outline-variant);
}

.preview-title {
    font-size: var(--font-size-xl);
    font-weight: 600;
    color: var(--md-on-surface);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.preview-title .material-icons {
    font-size: 24px;
    color: var(--md-primary);
}

.preview-devices {
    display: flex;
    gap: var(--spacing-sm);
}

.device-btn {
    background: var(--md-surface-container);
    border: 1px solid var(--md-outline-variant);
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
    color: var(--md-on-surface-variant);
}

.device-btn:hover {
    background: var(--md-surface-container-high);
    color: var(--md-on-surface);
}

.device-btn.active {
    background: var(--md-primary-container);
    border-color: var(--md-primary);
    color: var(--md-on-primary-container);
}

.device-btn .material-icons {
    font-size: 20px;
}

/* Preview Container */
.preview-container {
    background: var(--md-surface-container);
    border: 1px solid var(--md-outline-variant);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    /* Remove min-height so container can shrink/expand with iframe */
    display: flex;
    align-items: center;
    justify-content: center;
}

.iframe-container {
    width: 100%;
    /* Let JavaScript control height via iframe dimensions */
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--elevation-2);
    transition: all var(--transition-medium);
}

.iframe-container.tablet {
    width: 768px;
    max-width: 100%;
}

.iframe-container.mobile {
    width: 375px;
    max-width: 100%;
}

#preview-iframe {
    border: none;
    border-radius: var(--radius-md);
    /* Let JavaScript control dimensions completely */
}

/* Embed Code Section */
.embed-code-section {
    background: var(--md-surface-container);
    border: 1px solid var(--md-outline-variant);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.embed-title {
    font-size: var(--font-size-lg);
    font-weight: 600;
    color: var(--md-on-surface);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-md);
}

.embed-title .material-icons {
    font-size: 20px;
    color: var(--md-primary);
}

.embed-actions {
    margin-top: var(--spacing-md);
    padding-top: var(--spacing-md);
    border-top: 1px solid var(--md-outline-variant);
    display: flex;
    justify-content: center;
}

.code-wrapper {
    position: relative;
    background: var(--md-surface-container-highest);
    border: 1px solid var(--md-outline-variant);
    border-radius: var(--radius-md);
}

.code-block {
    padding: var(--spacing-md);
    margin: 0;
    font-family: 'Monaco', 'Menlo', 'Ubuntu Mono', monospace;
    font-size: var(--font-size-sm);
    line-height: 1.4;
    color: var(--md-on-surface);
    background: transparent;
    white-space: pre-wrap;
    word-break: break-all;
    overflow-x: auto;
}

.copy-btn {
    position: absolute;
    top: var(--spacing-sm);
    right: var(--spacing-sm);
    background: var(--md-primary);
    color: var(--md-on-primary);
    border: none;
    border-radius: var(--radius-md);
    padding: var(--spacing-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    box-shadow: var(--elevation-1);
}

.copy-btn:hover {
    background: color-mix(in srgb, var(--md-primary) 90%, white);
    box-shadow: var(--elevation-2);
}

.copy-btn .material-icons {
    font-size: 18px;
}

/* Toast Notification */
.toast {
    position: fixed;
    bottom: var(--spacing-lg);
    left: 50%;
    transform: translateX(-50%);
    background: var(--md-surface-container-highest);
    color: var(--md-on-surface);
    padding: var(--spacing-md) var(--spacing-lg);
    border-radius: var(--radius-xl);
    box-shadow: var(--elevation-3);
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    font-size: var(--font-size-md);
    font-weight: 500;
    z-index: 1000;
    transition: all var(--transition-medium);
}

.toast.hidden {
    opacity: 0;
    transform: translateX(-50%) translateY(20px);
    pointer-events: none;
}

.toast .material-icons {
    color: var(--md-success);
    font-size: 20px;
}

/* Utility Classes */
.hidden {
    display: none !important;
}

/* Responsive Design */
@media (max-width: 1024px) {
    .controls-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: var(--spacing-md);
    }
    
    .main-layout {
        padding: var(--spacing-lg);
        gap: var(--spacing-lg);
    }
    
    .header {
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    .header-title {
        font-size: var(--font-size-xl);
    }
}

@media (max-width: 768px) {
    .controls-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-md);
    }
    
    .iframe-container.tablet,
    .iframe-container.mobile {
        width: 100%;
        /* Let JavaScript control height - remove fixed height */
    }
    
    .preview-header {
        flex-direction: column;
        gap: var(--spacing-md);
        align-items: flex-start;
    }
    
    .header {
        padding: var(--spacing-md);
    }
    
    .main-layout {
        padding: var(--spacing-md);
        gap: var(--spacing-md);
    }
    
    .action-buttons {
        margin-bottom: var(--spacing-md);
    }
}

/* ==========================================
   BRANDING & COLORS CONTROLS
   ========================================== */

/* Branding Section - Full Width */
.branding-section {
    margin: var(--spacing-xl) 0;
    padding: var(--spacing-xl);
    background: var(--md-surface-container);
    border-radius: var(--radius-lg);
    border: 1px solid var(--md-outline-variant);
}

.branding-section .section-title {
    margin-bottom: var(--spacing-lg);
}

.branding-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-xl);
}

.branding-column {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

/* Responsive: Stack on smaller screens */
@media (max-width: 1200px) {
    .branding-grid {
        grid-template-columns: 1fr;
    }
}

/* Toggle Field (for icon visibility) */
.toggle-field {
    margin-top: var(--spacing-sm);
}

.toggle-label {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    cursor: pointer;
    user-select: none;
}

.toggle-input {
    position: absolute;
    opacity: 0;
    pointer-events: none;
}

.toggle-slider {
    position: relative;
    width: 44px;
    height: 24px;
    background: var(--md-surface-container-highest);
    border: 2px solid var(--md-outline-variant);
    border-radius: 12px;
    transition: all var(--transition-fast);
}

.toggle-slider::before {
    content: '';
    position: absolute;
    width: 16px;
    height: 16px;
    left: 2px;
    top: 2px;
    background: var(--md-outline);
    border-radius: 50%;
    transition: all var(--transition-fast);
}

.toggle-input:checked + .toggle-slider {
    background: var(--md-primary);
    border-color: var(--md-primary);
}

.toggle-input:checked + .toggle-slider::before {
    transform: translateX(20px);
    background: white;
}

.toggle-text {
    color: var(--md-on-surface);
    font-size: var(--font-size-sm);
    font-weight: 500;
}

/* Text Input for Header Title */
.text-input {
    appearance: none;
    background: var(--md-surface-container-highest);
    border: 1px solid var(--md-outline-variant);
    border-radius: var(--radius-md);
    color: var(--md-on-surface);
    font-family: var(--font-family);
    font-size: var(--font-size-sm);
    padding: 10px 14px;
    transition: all var(--transition-fast);
    width: 100%;
}

.text-input:focus {
    outline: none;
    border-color: var(--md-primary);
    box-shadow: 0 0 0 2px var(--focus-ring);
}

.text-input:hover {
    border-color: var(--md-on-surface-variant);
}

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

/* Color Input Group */
.color-input-group {
    display: flex;
    gap: 12px;
    align-items: center;
}

.color-picker {
    width: 60px;
    height: 40px;
    border: 2px solid var(--md-outline-variant);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: transform var(--transition-fast);
    background: transparent;
    padding: 0;
}

.color-picker:hover {
    transform: scale(1.05);
    border-color: var(--md-primary);
}

.color-picker:focus {
    outline: none;
    box-shadow: 0 0 0 2px var(--focus-ring);
}

.hex-input {
    flex: 1;
    padding: 10px 14px;
    background: var(--md-surface-container-highest);
    border: 1px solid var(--md-outline-variant);
    border-radius: var(--radius-md);
    color: var(--md-on-surface);
    font-family: 'Monaco', 'Courier New', monospace;
    font-size: 14px;
    transition: all var(--transition-fast);
}

.hex-input:focus {
    outline: none;
    border-color: var(--md-primary);
    box-shadow: 0 0 0 2px var(--focus-ring);
}

.hex-input:hover {
    border-color: var(--md-on-surface-variant);
}

/* Icon Preview */
.icon-preview-wrapper {
    margin-top: var(--spacing-sm);
}

.icon-preview {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 80px;
    height: 80px;
    background: var(--md-surface-container-highest);
    border: 2px solid var(--md-outline-variant);
    border-radius: var(--radius-lg);
    margin-top: var(--spacing-xs);
    transition: all var(--transition-fast);
}

.icon-preview i {
    font-size: 40px;
    color: var(--md-primary);
    transition: color var(--transition-fast);
}

.icon-preview:hover {
    border-color: var(--md-primary);
}

/* Input Hint / Help Text */
.input-hint {
    display: block;
    margin-top: var(--spacing-xs);
    font-size: var(--font-size-xs);
    color: var(--md-on-surface-variant);
    line-height: 1.4;
}

.input-hint a {
    color: var(--md-primary);
    text-decoration: none;
    transition: opacity var(--transition-fast);
}

.input-hint a:hover {
    opacity: 0.8;
    text-decoration: underline;
}

/* Reset Button */
.btn-reset {
    width: 100%;
    padding: 12px 16px;
    background: var(--md-surface-container-high);
    border: 1px solid var(--md-outline-variant);
    border-radius: var(--radius-md);
    color: var(--md-on-surface-variant);
    font-size: var(--font-size-sm);
    font-weight: 500;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    transition: all var(--transition-fast);
    margin-top: var(--spacing-lg);
    font-family: var(--font-family);
}

.btn-reset:hover {
    background: var(--md-surface-container-highest);
    border-color: var(--md-primary);
    color: var(--md-primary);
}

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

.btn-reset .material-icons {
    font-size: 18px;
}

/* Light Theme Adjustments */
[data-theme="light"] .color-picker {
    border-color: var(--md-outline);
}

[data-theme="light"] .icon-preview {
    box-shadow: var(--elevation-1);
}