/* Import base styles - Assuming similar root variables as index.css */
:root {
    --primary: #6d28d9;
    --primary-light: #8b5cf6; /* Lighter primary for hover/active */
    --primary-dark: #5b21b6;
    --secondary: #db2777; /* Adjusted secondary */
    --accent: #0ea5e9; /* Adjusted accent */
    --accent-light: #7dd3fc; /* Lighter accent for hover */
    --accent-dark: #0369a1; /* Darker accent */
    --success-light: #34d399;
    --error-light: #f87171;
    --warning-light: #fcd34d;
    --background: #f8fafc; /* Lighter background */
    --surface: #ffffff; /* White surface for cards */
    --surface-alt: #f1f5f9; /* Alt surface for headers/inputs */
    --text: #1e293b; /* Darker text */
    --text-light: #64748b; /* Lighter text */
    --text-lighter: #94a3b8;
    --border-color: #e2e8f0;
    --input-bg: #ffffff; /* White input background */
    --input-border: #cbd5e1;
    --input-focus-border: var(--primary);
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.03);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.07), 0 1px 2px 0 rgba(0, 0, 0, 0.04);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.08), 0 2px 4px -1px rgba(0, 0, 0, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.08), 0 4px 6px -2px rgba(0, 0, 0, 0.04);
    --border-radius: 6px; /* Slightly sharper radius */
    --border-radius-lg: 10px;
    --transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1); /* Smoother transition */
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-medium: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-bounce: all 0.3s cubic-bezier(0.68, -0.55, 0.27, 1.55);
    --error: #dc2626;
    --success: #16a34a;
    --warning: #f59e0b;
    --animation-speed: 0.3s;
    --bg-gradient-start: #f0e6ff; /* Light purple */
    --bg-gradient-end: #e0f7fa;   /* Light cyan */
}

[data-theme="dark"] {
    --primary: #8b5cf6;
    --primary-light: #a78bfa;
    --primary-dark: #7c3aed;
    --secondary: #f472b6;
    --accent: #38bdf8;
    --accent-light: #7dd3fc;
    --accent-dark: #0ea5e9;
    --success-light: #6ee7b7;
    --error-light: #fca5a5;
    --warning-light: #fde047;
    --background: #111827; /* Darker background */
    --surface: #1f2937; /* Darker surface */
    --surface-alt: #374151;
    --text: #f3f4f6; /* Lighter text */
    --text-light: #9ca3af;
    --text-lighter: #6b7280;
    --border-color: #374151;
    --input-bg: #374151;
    --input-border: #4b5563;
    --input-focus-border: var(--primary-light);
    --shadow-xs: 0 1px 2px 0 rgba(0, 0, 0, 0.1);
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.15), 0 1px 2px 0 rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.2), 0 2px 4px -1px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.2), 0 4px 6px -2px rgba(0, 0, 0, 0.1);
    --bg-gradient-start: #1a237e; /* Dark indigo */
    --bg-gradient-end: #004d40;   /* Dark teal */
}

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

body {
    font-family: 'Outfit', sans-serif;
    background: linear-gradient(135deg, var(--bg-gradient-start), var(--bg-gradient-end));
    color: var(--text);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    transition: background 0.5s, color 0.3s;
    font-size: 15px; /* Slightly smaller base font */
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.container {
    width: 100%;
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Add gradient animation keyframes */
@keyframes gradientAnimation {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

/* Apply animated gradient to elements with the class */
.animated-gradient {
    background: linear-gradient(-45deg, var(--primary), var(--secondary), var(--accent), var(--primary));
    background-size: 300% 300%;
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: gradientAnimation 8s ease infinite;
}

/* Header */
header {
    background-color: var(--surface); /* White header */
    padding: 0.8rem 0; /* Slightly reduced padding */
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 100;
    border-bottom: 1px solid var(--border-color);
    transition: background-color var(--transition-medium); /* Add transition */
}

header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: 700;
    text-decoration: none;
    color: var(--text);
}

.logo span {
    color: var(--accent);
}

.header-actions {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.theme-toggle {
    background: transparent;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    font-size: 1.2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition);
    width: 40px;
    height: 40px;
    border-radius: 50%;
}

.theme-toggle:hover {
    color: var(--primary);
    background-color: var(--surface-alt); /* Use alt surface for hover */
    transform: rotate(15deg) scale(1.1); /* Add scale */
}

.menu-toggle {
    display: none; /* Show only on smaller screens */
    background: transparent;
    border: none;
    color: var(--text-light);
    cursor: pointer;
    font-size: 1.2rem;
    width: 40px;
    height: 40px;
    border-radius: 50%;
    align-items: center;
    justify-content: center;
}

.menu-toggle:hover {
    background-color: var(--surface-alt);
    transform: scale(1.1); /* Add scale */
}

/* Mobile Menu */
.mobile-menu {
    display: none;
    position: fixed;
    top: 72px; /* Adjust based on header height */
    left: 0;
    right: 0;
    background-color: var(--surface);
    box-shadow: var(--shadow-md);
    z-index: 99;
    padding: 1rem 0;
    flex-direction: column;
    border-top: 1px solid var(--border-color);
    transform: translateY(-100%); /* Start off-screen */
    transition: transform var(--transition-medium);
    visibility: hidden; /* Hide initially */
}

.mobile-menu.active {
    transform: translateY(0);
    visibility: visible;
}

.mobile-menu a {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    color: var(--text);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
}

.mobile-menu a:hover {
    background-color: var(--surface-alt);
    color: var(--primary);
    padding-left: 1.8rem; /* Indent on hover */
}

.mobile-menu a.active {
    color: var(--primary);
    background-color: rgba(109, 40, 217, 0.06); /* More subtle active background */
}

/* Main Content */
main {
    flex: 1;
    padding: 3rem 0; /* Increased padding */
}

.page-title {
    text-align: center;
    margin-bottom: 3.5rem; /* Increased margin */
}

.page-title h1 {
    font-size: 3rem; /* Larger H1 */
    margin-bottom: 1rem;
    font-weight: 800; /* Bolder */
    letter-spacing: -0.5px;
    background: linear-gradient(to right, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.page-title p {
    color: var(--text-light);
    max-width: 650px;
    margin: 0 auto;
    font-size: 1.05rem; /* Slightly larger paragraph */
}

/* Generator Layout */
.generator-layout {
    display: grid;
    grid-template-columns: minmax(0, 2.2fr) minmax(0, 1fr); /* Adjust ratio slightly */
    gap: 3rem; /* Increased gap */
    align-items: flex-start;
}

.generator-form {
    /* No styles needed here, applied to sections */
}

.generator-preview {
    position: sticky;
    top: 90px; /* Adjust based on header height + margin */
    transition: top var(--transition-medium); /* Smooth sticky transition */
}

.preview-sticky-content {
    background: var(--surface);
    border-radius: var(--border-radius-lg);
    padding: 1.75rem; /* Increased padding */
    box-shadow: var(--shadow-md);
    text-align: center;
    border: 1px solid var(--border-color);
    transition: box-shadow var(--transition-medium), border-color var(--transition-medium);
}
.preview-sticky-content:hover {
    box-shadow: var(--shadow-lg); /* Enhance shadow on hover */
}

/* Form Sections */
.form-section {
    background: var(--surface);
    border-radius: var(--border-radius-lg);
    margin-bottom: 2.5rem; /* Increased spacing */
    box-shadow: var(--shadow-md);
    border: 1px solid var(--border-color);
    overflow: hidden; /* Ensure children adhere to border radius */
    transition: box-shadow var(--transition-medium), border-color var(--transition-medium);
}
.form-section:focus-within { /* Highlight section when interacting with inputs */
    border-color: var(--primary-light);
    box-shadow: var(--shadow-lg);
}

.form-section-header {
    display: flex;
    align-items: center;
    gap: 0.85rem;
    padding: 1.1rem 1.75rem; /* Increased padding */
    background-color: var(--surface-alt);
    border-bottom: 1px solid var(--border-color);
    transition: background-color var(--transition-medium);
}

.section-step {
    background-color: var(--primary);
    color: white;
    width: 30px;
    height: 30px;
    border-radius: 50%;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    font-weight: 600;
    font-size: 0.95rem;
    flex-shrink: 0;
    transition: background-color var(--transition-medium), transform var(--transition-fast);
}
.form-section:hover .section-step {
    transform: scale(1.1);
}

.form-section-header h2 {
    font-size: 1.35rem; /* Larger section title */
    font-weight: 700; /* Bolder */
    color: var(--text); /* Fallback color */
}

.form-section-body {
    padding: 1.75rem; /* Increased padding */
}

.form-label {
    display: block;
    margin-bottom: 1.25rem; /* Increased spacing */
    font-weight: 600;
    font-size: 1.05rem; /* Larger label */
    color: var(--text);
}

/* Type Selector */
.type-selector {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(95px, 1fr)); /* Adjust min width */
    gap: 0.85rem; /* Increased gap */
    margin-bottom: 1.75rem; /* Increased margin */
}

.type-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    padding: 0.85rem 0.5rem; /* Increased padding */
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--surface); /* White background */
    color: var(--text-light);
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
    font-size: 0.85rem; /* Slightly larger font */
    text-align: center;
    font-family: inherit;
    font-weight: 500;
    box-shadow: var(--shadow-xs);
}

.type-btn i {
    font-size: 1.2rem; /* Larger icon */
    margin-bottom: 0.1rem;
    color: var(--text-lighter);
    transition: var(--transition);
}

.type-btn:hover {
    border-color: var(--primary-light);
    background: rgba(109, 40, 217, 0.04);
    color: var(--primary);
    transform: translateY(-3px) scale(1.02); /* Lift and scale effect */
    box-shadow: var(--shadow-md);
}
.type-btn:hover i {
    color: var(--primary);
}

.type-btn.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    box-shadow: 0 3px 5px rgba(109, 40, 217, 0.25);
    transform: translateY(-1px); /* Keep slightly lifted */
}
.type-btn.active:hover {
    background: var(--primary-dark); /* Darken active on hover */
    transform: translateY(-3px) scale(1.02); /* Still lift */
}

.type-btn.active i {
    color: white;
}

.section-divider {
    border: none;
    border-top: 1px solid var(--border-color);
    margin: 1.75rem 0; /* Increased margin */
}

/* Form Groups & Inputs */
.form-group {
    margin-bottom: 1.5rem; /* Increased spacing */
}
.form-group:last-child {
    margin-bottom: 0;
}

.form-group label {
    display: block;
    margin-bottom: 0.6rem; /* Increased spacing */
    font-weight: 500;
    font-size: 0.9rem; /* Slightly larger label */
    color: var(--text-light);
}

.form-group input[type="text"],
.form-group input[type="url"],
.form-group input[type="email"],
.form-group input[type="tel"],
.form-group input[type="number"],
.form-group input[type="password"],
.form-group input[type="datetime-local"],
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 0.75rem 1rem; /* Adjusted padding */
    border: 1px solid var(--input-border);
    border-radius: var(--border-radius);
    background: var(--input-bg);
    color: var(--text);
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast);
    box-shadow: var(--shadow-xs);
}
/* Add placeholder styling */
.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-lighter);
    opacity: 1;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--input-focus-border);
    box-shadow: 0 0 0 3px rgba(109, 40, 217, 0.15); /* Brighter focus ring */
    background-color: var(--surface); /* Slightly change bg on focus */
}
[data-theme="dark"] .form-group input:focus,
[data-theme="dark"] .form-group textarea:focus,
[data-theme="dark"] .form-group select:focus {
    box-shadow: 0 0 0 3px rgba(139, 92, 246, 0.25);
    background-color: var(--surface-alt);
}

.form-group textarea {
    min-height: 90px; /* Slightly taller */
    resize: vertical;
}

.form-group small {
    display: block;
    margin-top: 0.6rem; /* Increased spacing */
    font-size: 0.85rem; /* Slightly larger */
    color: var(--text-lighter);
}

/* Enhanced Customization Section */
.customization-tabs {
    background: var(--surface);
    border-radius: var(--border-radius-lg);
    padding: 0.5rem;
    margin-bottom: 2rem;
    display: flex;
    gap: 0.5rem;
    position: sticky;
    top: 80px;
    z-index: 10;
    backdrop-filter: blur(10px);
}

.tab-btn {
    flex: 1;
    padding: 1rem;
    border: none;
    background: transparent;
    color: var(--text-light);
    font-weight: 500;
    border-radius: var(--border-radius);
    transition: var(--transition-bounce);
}

.tab-btn:hover {
    color: var(--primary);
    background: var(--surface-hover);
}

.tab-btn.active {
    background: var(--primary);
    color: white;
    transform: scale(1.05);
}

/* Color Picker Enhancements */
.color-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--surface);
    padding: 0.5rem;
    border-radius: var(--border-radius);
}

input[type="color"] {
    width: 45px;
    height: 45px;
    border-radius: var(--border-radius);
    border: 2px solid var(--surface-hover);
    cursor: pointer;
    padding: 0;
    transition: var(--transition);
}

input[type="color"]:hover {
    transform: scale(1.1);
    border-color: var(--primary-light);
}

/* Style Options Grid */
.style-options-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(100px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.style-option {
    aspect-ratio: 1;
    border: 2px solid var(--surface-hover);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-bounce);
}

.style-option:hover {
    transform: scale(1.05);
    border-color: var(--primary-light);
}

.style-option.active {
    background: var(--primary);
    border-color: var(--primary);
    color: white;
    transform: scale(1.1);
}

/* Preview Section Enhancements */
.preview-box {
    aspect-ratio: 1;
    padding: 2rem;
    background: white;
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    position: relative;
    overflow: hidden;
    transition: var(--transition);
}

.preview-box::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(45deg, transparent, rgba(109, 40, 217, 0.1));
    pointer-events: none;
}

.preview-box img {
    width: 100%;
    height: 100%;
    object-fit: contain;
    transition: var(--transition);
}

/* Customization Section */
.customization-tabs {
    display: flex;
    gap: 0;
    margin-bottom: 1.75rem; /* Increased margin */
    border-bottom: 1px solid var(--border-color);
    overflow-x: auto;
    scrollbar-width: none;
}
.customization-tabs::-webkit-scrollbar { display: none; }

.customization-tabs .tab-btn {
    padding: 0.9rem 1.3rem; /* Increased padding */
    border: none;
    background: transparent;
    cursor: pointer;
    color: var(--text-light);
    font-weight: 500;
    font-size: 0.95rem; /* Larger font */
    border-bottom: 2px solid transparent; /* Thinner border */
    transition: color var(--transition-fast), border-color var(--transition-fast), background-color var(--transition-fast);
    font-family: inherit;
    white-space: nowrap;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    margin-bottom: -1px;
}

.customization-tabs .tab-btn:hover {
    color: var(--primary); /* Use primary color on hover */
    background-color: var(--surface-alt);
}

.customization-tabs .tab-btn.active {
    color: var(--primary);
    border-bottom-color: var(--primary);
    font-weight: 600;
}

.customization-content .tab-pane {
    display: none;
    animation: fadeIn 0.3s ease-out;
}

.customization-content .tab-pane.active {
    display: block;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Options Groups */
.options-group {
    margin-bottom: 1.75rem; /* Increased spacing */
    padding-bottom: 1.75rem;
    border-bottom: 1px dashed var(--border-color);
    transition: border-color var(--transition-medium);
}
.options-group:last-child {
    margin-bottom: 0;
    padding-bottom: 0;
    border-bottom: none;
}

.options-group-title {
    display: block;
    font-weight: 600;
    font-size: 1rem; /* Larger title */
    margin-bottom: 1.25rem; /* Increased spacing */
    color: var(--text);
}

.options-grid {
    display: grid;
    gap: 1.5rem; /* Increased gap */
}
.options-grid.two-cols { grid-template-columns: repeat(2, 1fr); }
.options-grid.three-cols { grid-template-columns: repeat(3, 1fr); }

/* Color Input */
.color-input-wrapper {
    display: flex;
    align-items: center;
    gap: 0.6rem; /* Increased gap */
}

.color-input-wrapper input[type="color"] {
    width: 38px; /* Slightly larger */
    height: 38px;
    padding: 0;
    border: 1px solid var(--input-border);
    border-radius: var(--border-radius);
    cursor: pointer;
    flex-shrink: 0;
    appearance: none;
    -webkit-appearance: none;
    background-color: transparent;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast);
}
/* Style the inner color swatch */
.color-input-wrapper input[type="color"]::-webkit-color-swatch-wrapper {
    padding: 0;
}
.color-input-wrapper input[type="color"]::-webkit-color-swatch {
    border: none;
    border-radius: calc(var(--border-radius) - 3px); /* Adjust inner radius */
}
.color-input-wrapper input[type="color"]::-moz-color-swatch {
    border: none;
    border-radius: calc(var(--border-radius) - 3px);
}
.color-input-wrapper input[type="color"]:hover {
    transform: scale(1.1);
    box-shadow: var(--shadow-sm);
}
.color-input-wrapper input[type="color"]:active {
    transform: scale(1.05);
}

.color-input-wrapper .color-hex-input {
    flex-grow: 1;
    max-width: 95px; /* Slightly wider */
    font-family: monospace;
    text-transform: uppercase;
}

/* Gradient Options */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.7rem; /* Increased gap */
    cursor: pointer;
    font-weight: 600; /* Make it same weight as title */
    font-size: 1rem; /* Match title size */
    color: var(--text);
    transition: color var(--transition-fast);
}
.checkbox-label:hover {
    color: var(--primary);
}
.checkbox-label input[type="checkbox"] {
    width: 17px; /* Slightly smaller */
    height: 17px;
    accent-color: var(--primary);
    cursor: pointer;
    transition: transform var(--transition-fast);
}
.checkbox-label:hover input[type="checkbox"] {
    transform: scale(1.1);
}

#gradientControls {
    padding-left: 0;
    margin-top: 1.25rem; /* Increased margin */
}

/* Slider */
.slider-container {
    display: flex;
    align-items: center;
    gap: 0.85rem; /* Increased gap */
}
.slider-container input[type="range"] {
    flex-grow: 1;
    height: 5px; /* Thinner track */
    cursor: pointer;
    appearance: none;
    background: var(--surface-alt); /* Use alt surface */
    border-radius: 3px;
    outline: none;
    border: 1px solid var(--border-color);
    transition: background var(--transition-fast), border-color var(--transition-fast);
}
.slider-container input[type="range"]::-webkit-slider-thumb {
    appearance: none;
    width: 18px; /* Larger thumb */
    height: 18px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid var(--surface); /* Add border to thumb */
    box-shadow: var(--shadow-sm);
    transition: background var(--transition-fast), transform var(--transition-fast);
}
.slider-container input[type="range"]::-moz-range-thumb {
    width: 18px;
    height: 18px;
    background: var(--primary);
    border-radius: 50%;
    cursor: pointer;
    border: 2px solid var(--surface);
    box-shadow: var(--shadow-sm);
    transition: background var(--transition-fast), transform var(--transition-fast);
}
.slider-container input[type="range"]:hover::-webkit-slider-thumb {
    background: var(--primary-dark);
    transform: scale(1.15);
}
.slider-container input[type="range"]:hover::-moz-range-thumb {
    background: var(--primary-dark);
    transform: scale(1.15);
}
.slider-container input[type="range"]:active::-webkit-slider-thumb {
    transform: scale(1.1);
}
.slider-container input[type="range"]:active::-moz-range-thumb {
    transform: scale(1.1);
}
.slider-value {
    font-weight: 500;
    font-size: 0.9rem;
    color: var(--text-light);
    min-width: 40px; /* Ensure more space */
    text-align: right;
}

/* Logo Upload */
.logo-upload-area {
    /* Container for input and label */
}
.logo-input-hidden {
    width: 0.1px; height: 0.1px; opacity: 0; overflow: hidden; position: absolute; z-index: -1;
}
.logo-upload-label {
    display: block;
    cursor: pointer;
}
.logo-preview-container {
    position: relative;
    width: 130px; /* Larger */
    height: 130px;
    border: 2px dashed var(--input-border);
    border-radius: var(--border-radius);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-top: 0.75rem; /* Increased margin */
    background-color: var(--surface-alt); /* Use alt surface */
    transition: border-color var(--transition-medium), background-color var(--transition-medium), transform var(--transition-medium);
    overflow: hidden;
}
.logo-upload-label:hover .logo-preview-container {
    border-color: var(--primary);
    background-color: rgba(109, 40, 217, 0.05);
    transform: scale(1.03); /* Scale up slightly */
}
.logo-upload-placeholder {
    text-align: center;
    color: var(--text-lighter);
}
.logo-upload-placeholder i {
    font-size: 1.8rem; /* Larger icon */
    margin-bottom: 0.6rem;
    display: block;
}
.logo-upload-placeholder span {
    font-size: 0.9rem; /* Larger text */
    font-weight: 500;
}

#logoPreview {
    position: absolute; /* Position over placeholder */
    top: 0; left: 0; width: 100%; height: 100%;
    object-fit: contain;
    padding: 6px; /* Slightly more padding */
}
/* Hide placeholder when logo is shown */
#logoPreview[style*="display: block"] + .logo-upload-placeholder {
    display: none;
}

#removeLogoBtn {
    position: absolute;
    top: 4px;
    right: 4px;
    width: 26px; /* Larger button */
    height: 26px;
    border-radius: 50%;
    background: rgba(0, 0, 0, 0.5);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.9rem;
    line-height: 1;
    transition: background-color var(--transition-fast), opacity var(--transition-fast), transform var(--transition-fast);
    opacity: 0; /* Hidden by default */
    transform: scale(0.8);
}
.logo-preview-container:hover #removeLogoBtn[style*="display: block"] {
    opacity: 1;
    transform: scale(1);
}
#removeLogoBtn:hover {
    background: var(--error);
    transform: scale(1.1) rotate(10deg); /* Add rotation */
}

/* Style Selector */
.style-selector {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(105px, 1fr)); /* Adjust min width */
    gap: 0.85rem; /* Increased gap */
}

.style-option {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.6rem; /* Increased gap */
    padding: 0.85rem; /* Increased padding */
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background: var(--surface); /* White background */
    color: var(--text-light);
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
    font-size: 0.9rem; /* Larger font */
    text-align: center;
    font-weight: 500;
    box-shadow: var(--shadow-xs);
}

.style-option i {
    font-size: 1.4rem; /* Larger icon */
    margin-bottom: 0.25rem;
    color: var(--text-lighter);
    transition: var(--transition);
}

.style-option:hover {
    border-color: var(--primary-light);
    background: rgba(109, 40, 217, 0.04);
    color: var(--primary);
    transform: translateY(-3px) scale(1.02);
    box-shadow: var(--shadow-md);
}
.style-option:hover i {
    color: var(--primary);
}

.style-option.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    box-shadow: 0 3px 5px rgba(109, 40, 217, 0.25);
    transform: translateY(-1px);
}
.style-option.active:hover {
    background: var(--primary-dark);
    transform: translateY(-3px) scale(1.02);
}

.style-option.active i {
    color: white;
}

/* Preview Box */
.preview-box {
    width: 100%;
    max-width: 300px; /* Larger max */
    aspect-ratio: 1 / 1;
    margin: 0 auto 1.75rem; /* Increased margin */
    background: var(--surface-alt); /* Use alt surface */
    border-radius: var(--border-radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    position: relative;
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md); /* Slightly stronger shadow */
    transition: box-shadow var(--transition-medium), border-color var(--transition-medium), transform var(--transition-medium);
}
.preview-box:hover {
    transform: scale(1.02); /* Scale preview on hover */
    box-shadow: var(--shadow-lg);
}

.preview-box img#qrPreviewImage,
.preview-box #qrPreviewSVGContainer {
    display: block;
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    transition: opacity var(--transition-slow); /* Slower fade */
}

.preview-box .placeholder-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--text-lighter);
    font-size: 0.95rem; /* Larger text */
    text-align: center;
    padding: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.85rem; /* Increased gap */
    transition: opacity var(--transition-slow), color var(--transition-medium);
}
.preview-box .placeholder-text i {
    font-size: 3.5rem; /* Larger icon */
    opacity: 0.4;
}
.preview-box:hover .placeholder-text {
    color: var(--text-light); /* Slightly darken placeholder text on hover */
}

.preview-box img#qrPreviewImage[src=""],
.preview-box #qrPreviewSVGContainer:empty {
    opacity: 0; /* Hide if no content */
}

/* Show placeholder only when image/svg is hidden */
.preview-box img#qrPreviewImage:not([src=""]) + #qrPreviewSVGContainer + .placeholder-text,
.preview-box img#qrPreviewImage[src=""] + #qrPreviewSVGContainer:not(:empty) + .placeholder-text {
    opacity: 0;
    pointer-events: none;
}

#qrPreviewSVGContainer svg {
    max-width: 100%;
    max-height: 100%;
    display: block;
}

.preview-logo {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    max-width: 30%; /* Default max size, controlled by JS */
    max-height: 30%;
    background-color: var(--bgColor, #ffffff); /* Use background color for padding */
    padding: 3px; /* Adjust padding */
    border-radius: 5px; /* Adjust radius */
    box-shadow: 0 1px 4px rgba(0,0,0,0.15); /* Adjust shadow */
    pointer-events: none; /* Prevent interaction */
    z-index: 10; /* Ensure logo is above QR */
}

/* Frame Preview Styles */
.preview-box .frame-overlay {
    position: absolute;
    top: 0; left: 0; right: 0; bottom: 0;
    pointer-events: none;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    overflow: hidden;
    border-radius: var(--border-radius-lg); /* Match preview box */
    z-index: 5; /* Below logo, above QR */
}

.preview-box .frame-banner {
    width: 100%;
    padding: 7px 12px; /* Adjusted padding */
    text-align: center;
    font-weight: 600;
    font-size: 13px; /* Adjusted font size */
    box-sizing: border-box;
    position: absolute;
    left: 0;
    text-transform: uppercase;
    letter-spacing: 0.6px;
}
.preview-box .frame-banner.top { top: 0; border-radius: var(--border-radius-lg) var(--border-radius-lg) 0 0; }
.preview-box .frame-banner.bottom { bottom: 0; border-radius: 0 0 var(--border-radius-lg) var(--border-radius-lg); }

.preview-box .frame-box-text {
    position: absolute;
    bottom: 10px; /* Adjusted position */
    width: auto; /* Fit content */
    max-width: 90%;
    text-align: center;
    font-weight: 600;
    font-size: 13px;
    padding: 4px 9px; /* Adjusted padding */
    border-radius: 5px;
    text-transform: uppercase;
    letter-spacing: 0.6px;
}
/* Box frame border itself */
.preview-box .frame-overlay[style*="border"] {
     border-width: 18px; /* Adjust border width */
     border-radius: var(--border-radius-lg); /* Ensure border respects radius */
}

/* Download Options */
.download-options {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 0.85rem; /* Increased gap */
    margin-top: 1.75rem; /* Increased margin */
}

.download-options .btn {
    width: 100%;
    font-size: 0.9rem; /* Larger font */
    padding: 0.7rem 1.1rem; /* Adjusted padding */
    border-radius: var(--border-radius);
}

/* Specific button styles */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem; /* Increased gap */
    padding: 0.8rem 1.6rem; /* Adjusted padding */
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: transform var(--transition-fast), box-shadow var(--transition-fast), background-color var(--transition-fast), border-color var(--transition-fast), color var(--transition-fast);
    will-change: transform, box-shadow; /* Optimize transitions */
    border: 1px solid transparent;
    text-decoration: none;
    font-family: inherit;
    font-size: 0.95rem; /* Base button font size */
    line-height: 1.3;
    box-shadow: var(--shadow-sm);
}
.btn:hover {
    transform: translateY(-3px); /* Lift effect */
    box-shadow: var(--shadow-md);
}
.btn:active {
    transform: translateY(-1px); /* Press effect */
    box-shadow: var(--shadow-sm);
}
.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none !important; /* Ensure no transform when disabled */
    box-shadow: none !important;
}

.btn-primary {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}
.btn-primary:hover {
    background: var(--primary-dark);
    border-color: var(--primary-dark);
}

.btn-secondary {
    background: var(--surface);
    color: var(--text);
    border-color: var(--border-color);
}
.btn-secondary:hover {
    background: var(--surface-alt);
    border-color: var(--input-border);
    color: var(--primary); /* Change text color on hover */
}

.btn-outline {
    background: transparent;
    color: var(--primary);
    border-color: var(--primary);
    box-shadow: none; /* No shadow for outline */
}
.btn-outline:hover {
    background: rgba(109, 40, 217, 0.08);
    transform: translateY(-2px); /* Slightly less lift for outline */
    box-shadow: none;
}
.btn-outline:active {
    background: rgba(109, 40, 217, 0.12);
    transform: translateY(0px);
}

/* Generate Button */
.generate-btn {
    width: 100%;
    padding: 1rem 1.75rem; /* Larger padding */
    font-size: 1.15rem; /* Larger font */
    margin-top: 1.5rem; /* Increased margin */
    letter-spacing: 0.5px;
}
.generate-btn:hover {
    letter-spacing: 1px; /* Animate letter spacing */
}

/* Footer */
footer {
    padding: 2.5rem 0; /* Increased padding */
    background-color: var(--surface);
    margin-top: 3.5rem; /* Increased margin */
    border-top: 1px solid var(--border-color);
    transition: background-color var(--transition-medium);
}

footer .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 1rem;
}

footer p {
    color: var(--text-light);
}

footer a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}

footer a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* Loading Overlay */
.loading-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.4);
    backdrop-filter: blur(5px);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity var(--transition-medium), visibility var(--transition-medium);
}

.loading-overlay.active {
    opacity: 1;
    visibility: visible;
}

.spinner {
    width: 50px;
    height: 50px;
    border: 5px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    transition: border-color var(--transition-medium);
}

.loading-overlay p {
    margin-top: 1rem;
    color: white;
    font-weight: 500;
}

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

/* Notification System */
.notification {
    position: fixed;
    bottom: 20px;
    right: 20px;
    background: var(--surface); /* Use surface background */
    border-radius: var(--border-radius);
    padding: 1rem;
    display: flex;
    align-items: center;
    box-shadow: var(--shadow-lg); /* More prominent shadow */
    max-width: 400px;
    z-index: 1001;
    transform: translateY(150%);
    opacity: 0;
    transition: transform var(--transition-medium), opacity var(--transition-medium), background-color var(--transition-medium), border-left-color var(--transition-medium);
    border-left: 4px solid var(--primary);
}

.notification.success { border-left-color: var(--success); }
.notification.error { border-left-color: var(--error); }
.notification.warning { border-left-color: var(--warning); }

.notification.show {
    transform: translateY(0);
    opacity: 1;
}

.notification-icon { margin-right: 1rem; font-size: 1.25rem; color: var(--primary); }
.notification.success .notification-icon { color: var(--success); }
.notification.error .notification-icon { color: var(--error); }
.notification.warning .notification-icon { color: var(--warning); }

.notification-content { flex: 1; }
.notification-message { font-size: 0.95rem; color: var(--text); font-weight: 500; }
.notification-close { background: none; border: none; color: var(--text-lighter); cursor: pointer; padding: 5px; margin-left: 10px; transition: color var(--transition-fast), transform var(--transition-fast); }
.notification-close:hover { color: var(--text); transform: rotate(90deg); }

/* Responsive Design */
@media (max-width: 1024px) {
    .generator-layout {
        grid-template-columns: minmax(0, 2fr) minmax(0, 1fr); /* Adjust ratio */
        gap: 2.5rem;
    }
}

@media (max-width: 900px) { /* Breakpoint for stacking */
    .generator-layout {
        grid-template-columns: 1fr;
        gap: 2.5rem; /* Keep gap consistent */
    }
    .generator-preview {
        position: static;
        margin-top: 0; /* Remove margin, handled by layout gap */
    }
    .preview-box {
        max-width: 340px; /* Allow slightly larger preview */
    }
}

@media (max-width: 768px) {
    .page-title h1 { font-size: 2.2rem; }
    .menu-toggle { display: flex; }
    .options-grid.three-cols { grid-template-columns: repeat(auto-fit, minmax(150px, 1fr)); } /* More flexible grid */
    .type-selector { grid-template-columns: repeat(auto-fill, minmax(85px, 1fr)); }
    .customization-tabs .tab-btn { padding: 0.8rem 1.1rem; font-size: 0.9rem; }
}

@media (max-width: 576px) {
    .container { padding: 0 1rem; }
    main { padding: 2rem 0; }
    .page-title { margin-bottom: 2.5rem; }
    .page-title h1 { font-size: 1.9rem; }
    .page-title p { font-size: 1rem; }
    .generator-layout { gap: 2rem; }
    .form-section { margin-bottom: 2rem; }
    .form-section-header { padding: 1rem 1.25rem; }
    .form-section-header h2 { font-size: 1.15rem; }
    .section-step { width: 26px; height: 26px; font-size: 0.85rem; }
    .form-section-body { padding: 1.25rem; }
    .type-selector { gap: 0.6rem; }
    .options-grid.two-cols, .options-grid.three-cols { grid-template-columns: 1fr; } /* Stack all grids */
    .style-selector { grid-template-columns: repeat(auto-fill, minmax(90px, 1fr)); }
    .download-options { grid-template-columns: 1fr; }
    .btn { padding: 0.7rem 1.4rem; font-size: 0.9rem; } /* Adjust button padding/size */
    .generate-btn { font-size: 1rem; padding: 0.9rem 1.5rem; }
}