/* ==========================================================================
   QR Studio Premium CSS Stylesheet
   Design Philosophy: Rich Aesthetics, Glassmorphism, Neon Glows, Responsive
   ========================================================================== */

/* 1. Global Variables & Base Setup */
:root {
    --bg-base: #090d1a;
    --bg-card: rgba(20, 27, 46, 0.65);
    --bg-card-hover: rgba(28, 37, 61, 0.8);
    --border-glass: rgba(255, 255, 255, 0.08);
    --border-glass-focus: rgba(99, 102, 241, 0.4);
    
    --primary: #6366f1; /* Indigo */
    --primary-glow: rgba(99, 102, 241, 0.35);
    --secondary: #10b981; /* Emerald */
    --accent: #d946ef; /* Fuchsia */
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --text-dark: #0f172a;
    
    --font-primary: 'Plus Jakarta Sans', 'Noto Sans KR', -apple-system, sans-serif;
    --radius-lg: 24px;
    --radius-md: 16px;
    --radius-sm: 10px;
    --shadow-premium: 0 20px 40px -15px rgba(0, 0, 0, 0.7);
    --transition-smooth: all 0.35s cubic-bezier(0.25, 0.8, 0.25, 1);
    --transition-spring: all 0.5s cubic-bezier(0.68, -0.6, 0.32, 1.6);
}

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

body {
    background-color: var(--bg-base);
    color: var(--text-main);
    font-family: var(--font-primary);
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
    line-height: 1.6;
}

/* 2. Abstract Glowing Nebula Orbs */
.glow-orb {
    position: fixed;
    border-radius: 50%;
    filter: blur(120px);
    z-index: -1;
    pointer-events: none;
    opacity: 0.45;
}

.orb-1 {
    top: -10%;
    left: -10%;
    width: 50vw;
    height: 50vw;
    background: radial-gradient(circle, var(--primary) 0%, rgba(99, 102, 241, 0) 70%);
}

.orb-2 {
    bottom: -10%;
    right: -10%;
    width: 60vw;
    height: 60vw;
    background: radial-gradient(circle, var(--accent) 0%, rgba(217, 70, 239, 0) 70%);
}

.orb-3 {
    top: 30%;
    right: 25%;
    width: 30vw;
    height: 30vw;
    background: radial-gradient(circle, var(--secondary) 0%, rgba(16, 185, 129, 0) 70%);
    opacity: 0.25;
}

/* 3. Layout Containers */
.app-container {
    max-width: 1300px;
    margin: 0 auto;
    padding: 40px 24px;
    display: flex;
    flex-direction: column;
    gap: 32px;
    min-height: 100vh;
}

/* Header */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo-area {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo-icon {
    width: 54px;
    height: 54px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    color: white;
    box-shadow: 0 8px 24px var(--primary-glow);
}

.logo-area h1 {
    font-size: 26px;
    font-weight: 800;
    letter-spacing: -0.5px;
    display: flex;
    align-items: center;
    gap: 8px;
    background: linear-gradient(to right, #ffffff, #c7d2fe);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.badge {
    font-size: 11px;
    font-weight: 700;
    padding: 2px 8px;
    background: linear-gradient(135deg, var(--accent) 0%, #a21caf 100%);
    border-radius: 20px;
    color: white;
    letter-spacing: 0.5px;
    -webkit-text-fill-color: white; /* Reset */
    box-shadow: 0 4px 12px rgba(217, 70, 239, 0.4);
}

.logo-area p {
    font-size: 14px;
    color: var(--text-muted);
    margin-top: 2px;
}

/* Glassmorphism utility */
.glass {
    background: var(--bg-card);
    backdrop-filter: blur(25px);
    -webkit-backdrop-filter: blur(25px);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-premium);
}

/* 4. Workspace Grid Layout */
.workspace-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 32px;
    align-items: start;
}

/* 5. Control Panel (Left column) */
.control-panel {
    display: flex;
    flex-direction: column;
    overflow: hidden;
}

/* Tab Navigation */
.tabs-nav {
    display: flex;
    background: rgba(0, 0, 0, 0.2);
    border-bottom: 1px solid var(--border-glass);
    padding: 6px;
}

.tab-btn {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-muted);
    font-family: var(--font-primary);
    font-weight: 600;
    font-size: 13px;
    padding: 14px 10px;
    cursor: pointer;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    transition: var(--transition-smooth);
}

.tab-btn i {
    font-size: 16px;
}

.tab-btn:hover {
    color: var(--text-main);
    background: rgba(255, 255, 255, 0.03);
}

.tab-btn.active {
    color: var(--text-main);
    background: var(--bg-card-hover);
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.2), inset 0 1px 0 rgba(255,255,255,0.1);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

/* Tab Content Areas */
.tab-content-container {
    padding: 30px;
    min-height: 420px;
}

.tab-pane {
    display: none;
    animation: fadeIn 0.4s ease-in-out forwards;
}

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

.tab-pane h2 {
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 6px;
    letter-spacing: -0.3px;
}

.tab-desc {
    font-size: 14px;
    color: var(--text-muted);
    margin-bottom: 24px;
}

/* 6. Form elements and UI controls */
.input-group {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 20px;
}

.input-group label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-main);
    display: flex;
    align-items: center;
    gap: 8px;
}

.input-group label i {
    color: var(--primary);
}

.input-group input[type="text"] {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
    color: white;
    font-family: var(--font-primary);
    font-size: 15px;
    outline: none;
    transition: var(--transition-smooth);
}

.input-group input[type="text"]:focus {
    border-color: var(--primary);
    box-shadow: 0 0 12px rgba(99, 102, 241, 0.25);
    background: rgba(0, 0, 0, 0.45);
}

.input-helper {
    font-size: 12px;
    color: var(--text-muted);
}

/* Shortcut Grid */
.shortcut-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

.shortcut-btn {
    background: rgba(255, 255, 255, 0.03);
    border: 1px solid var(--border-glass);
    color: var(--text-muted);
    border-radius: var(--radius-sm);
    padding: 10px 6px;
    font-size: 12px;
    font-family: var(--font-primary);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.shortcut-btn:hover {
    color: white;
    background: rgba(255, 255, 255, 0.08);
    border-color: rgba(255, 255, 255, 0.15);
}

.shortcut-btn.active {
    color: white;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2) 0%, rgba(99, 102, 241, 0.05) 100%);
    border-color: var(--primary);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.15);
}

/* Brand Preset Cards */
.preset-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.preset-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 16px 8px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    transition: var(--transition-spring);
    font-family: var(--font-primary);
    color: var(--text-muted);
    font-weight: 600;
    font-size: 12px;
}

.preset-card:hover {
    transform: translateY(-4px);
    background: var(--bg-card-hover);
    border-color: rgba(255,255,255,0.15);
    color: white;
}

.preset-card.active {
    background: rgba(99, 102, 241, 0.08);
    border-color: var(--primary);
    color: white;
    box-shadow: 0 10px 25px rgba(99, 102, 241, 0.15), inset 0 1px 0 rgba(255,255,255,0.05);
}

.preset-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: white;
    transition: var(--transition-smooth);
}

/* Social Icon Colors */
.preset-icon.none { background-color: rgba(255, 255, 255, 0.05); border: 1px dashed rgba(255, 255, 255, 0.25); color: var(--text-muted); }
.preset-icon.linkedin { background-color: #0A66C2; }
.preset-icon.instagram { background: linear-gradient(45deg, #f09433 0%, #e6683c 25%, #dc2743 50%, #cc2366 75%, #bc1888 100%); }
.preset-icon.spotify { background-color: #1DB954; }
.preset-icon.youtube { background-color: #FF0000; }
.preset-icon.github { background-color: #24292F; }
.preset-icon.twitter { background-color: #000000; border: 1px solid rgba(255,255,255,0.1); }

.preset-card.active .preset-icon {
    transform: scale(1.1);
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
}

/* 7. Toggle Group */
.toggle-group {
    display: flex;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    padding: 4px;
    margin-bottom: 20px;
}

.toggle-btn {
    flex: 1;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-muted);
    font-family: var(--font-primary);
    font-weight: 600;
    font-size: 13px;
    padding: 10px;
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.toggle-btn.active {
    background: var(--primary);
    color: white;
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.3);
}

/* Upload Section */
.upload-section {
    margin-bottom: 24px;
}

.drag-drop-zone {
    border: 2px dashed var(--border-glass);
    border-radius: var(--radius-md);
    padding: 30px 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 10px;
    cursor: pointer;
    transition: var(--transition-smooth);
    background: rgba(0, 0, 0, 0.15);
}

.drag-drop-zone:hover {
    border-color: var(--primary);
    background: rgba(99, 102, 241, 0.04);
}

.drag-drop-zone i {
    font-size: 32px;
    color: var(--primary);
}

.drag-drop-zone span {
    font-size: 13px;
    font-weight: 600;
}

.drag-drop-zone .file-info {
    font-size: 11px;
    color: var(--text-muted);
    font-weight: 400;
}

.preview-upload-wrap {
    display: flex;
    align-items: center;
    justify-content: space-between;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-md);
    padding: 12px 16px;
}

.preview-upload-wrap img {
    height: 50px;
    width: 50px;
    object-fit: contain;
    border-radius: 8px;
    background: white;
    padding: 2px;
    border: 1px solid rgba(255,255,255,0.1);
}

.btn-remove-img {
    background: rgba(239, 68, 68, 0.15);
    border: 1px solid rgba(239, 68, 68, 0.25);
    color: #ef4444;
    padding: 8px 14px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    font-family: var(--font-primary);
    font-weight: 600;
    font-size: 12px;
    transition: var(--transition-smooth);
}

.btn-remove-img:hover {
    background: #ef4444;
    color: white;
}

/* Adjustments Sliders */
.control-group {
    margin-bottom: 20px;
}

.control-group-title {
    font-size: 14px;
    font-weight: 700;
    color: var(--text-main);
    margin: 24px 0 12px 0;
    padding-bottom: 6px;
    border-bottom: 1px solid rgba(255,255,255,0.05);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.slider-row {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.slider-row label {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-main);
}

.val-display {
    font-size: 12px;
    font-weight: 700;
    color: var(--primary);
    background: rgba(99, 102, 241, 0.12);
    padding: 2px 8px;
    border-radius: 20px;
}

.slider-info {
    font-size: 11px;
    color: var(--text-muted);
    margin-bottom: 6px;
    line-height: 1.4;
}

/* Custom Range Inputs styling */
input[type="range"] {
    -webkit-appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.1);
    outline: none;
    transition: background 0.3s;
}

input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    box-shadow: 0 0 10px var(--primary-glow);
    transition: transform 0.1s;
}

input[type="range"]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

/* Style Select Buttons */
.select-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    margin-bottom: 20px;
}

.style-select-btn {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    padding: 14px 6px;
    cursor: pointer;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--text-muted);
    font-family: var(--font-primary);
    font-weight: 600;
    font-size: 12px;
    transition: var(--transition-smooth);
}

.style-select-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    color: white;
}

.style-select-btn.active {
    background: rgba(99, 102, 241, 0.08);
    border-color: var(--primary);
    color: white;
    box-shadow: inset 0 1px 0 rgba(255,255,255,0.05);
}

.style-select-btn i {
    font-size: 20px;
    color: var(--primary);
}

/* Color Controls */
.color-control-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-bottom: 16px;
}

.color-control-grid.full-width {
    grid-template-columns: 1fr;
}

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

.color-item.full-width {
    grid-column: span 2;
}

.color-item label {
    font-size: 12px;
    font-weight: 600;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 6px;
}

.dot-indicator {
    display: inline-block;
    width: 8px;
    height: 8px;
    border-radius: 50%;
}

.dark-dot { background-color: #000000; border: 1px solid rgba(255,255,255,0.2); }
.light-dot { background-color: #ffffff; border: 1px solid rgba(255,255,255,0.2); }

.color-picker-wrapper {
    display: flex;
    background: rgba(0, 0, 0, 0.25);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    padding: 6px;
    align-items: center;
    gap: 8px;
}

.color-picker-wrapper input[type="color"] {
    -webkit-appearance: none;
    border: none;
    width: 32px;
    height: 32px;
    border-radius: 8px;
    cursor: pointer;
    background: transparent;
}

.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(255,255,255,0.15);
    border-radius: 6px;
}

.hex-text {
    background: transparent;
    border: none;
    outline: none;
    color: white;
    font-family: var(--font-primary);
    font-size: 13px;
    font-weight: 600;
    width: 70px;
    text-transform: uppercase;
}

.divider {
    border: none;
    border-top: 1px solid rgba(255,255,255,0.05);
    margin: 20px 0;
}

/* Advanced settings drawer */
.advanced-section {
    border-top: 1px solid var(--border-glass);
    background: rgba(0,0,0,0.1);
}

.advanced-toggle-btn {
    width: 100%;
    background: transparent;
    border: none;
    outline: none;
    color: var(--text-muted);
    font-family: var(--font-primary);
    font-weight: 600;
    font-size: 13px;
    padding: 16px 30px;
    cursor: pointer;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: var(--transition-smooth);
}

.advanced-toggle-btn:hover {
    color: white;
    background: rgba(255,255,255,0.02);
}

.advanced-toggle-btn .arrow {
    transition: transform 0.3s ease;
}

.advanced-toggle-btn.open .arrow {
    transform: rotate(180deg);
}

.advanced-content {
    display: none;
    padding: 0 30px 30px 30px;
    animation: slideDown 0.3s ease-out forwards;
}

.advanced-content.show {
    display: block;
}

.advanced-content select {
    background: rgba(0, 0, 0, 0.3);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    padding: 12px;
    color: white;
    font-family: var(--font-primary);
    font-size: 13px;
    outline: none;
    width: 100%;
    cursor: pointer;
}

/* 8. Preview Panel (Right column - sticky) */
.preview-panel {
    display: flex;
    flex-direction: column;
    gap: 24px;
    position: sticky;
    top: 40px;
}

.preview-card {
    padding: 30px;
    display: flex;
    flex-direction: column;
    align-items: center;
    position: relative;
    overflow: hidden;
}

/* Scanner Indicator Badge & Scanability scale */
.scanner-indicator {
    width: 100%;
    margin-bottom: 24px;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.indicator-badge {
    align-self: center;
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 12px;
    font-weight: 700;
    padding: 6px 14px;
    border-radius: 20px;
    box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.indicator-badge.perfect {
    background: rgba(16, 185, 129, 0.12);
    border: 1px solid rgba(16, 185, 129, 0.25);
    color: var(--secondary);
}

.indicator-badge.warning {
    background: rgba(245, 158, 11, 0.12);
    border: 1px solid rgba(245, 158, 11, 0.25);
    color: #f59e0b;
}

.indicator-badge.danger {
    background: rgba(239, 68, 68, 0.12);
    border: 1px solid rgba(239, 68, 68, 0.25);
    color: #ef4444;
}

.status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background-color: currentColor;
    box-shadow: 0 0 8px currentColor;
    animation: pulse 1.5s infinite alternate;
}

.scanability-bar-container {
    width: 100%;
    height: 6px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 3px;
    overflow: hidden;
}

.scanability-fill {
    height: 100%;
    background: linear-gradient(to right, var(--primary), var(--secondary));
    border-radius: 3px;
    transition: width 0.6s cubic-bezier(0.25, 0.8, 0.25, 1);
}

/* Smartphone Mockup Container */
.phone-mockup {
    width: 290px;
    height: 290px;
    background: #0d1222;
    border: 8px solid #232c49;
    border-radius: 36px;
    padding: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    box-shadow: 0 25px 50px -12px rgba(0, 0, 0, 0.8), 
                inset 0 1px 2px rgba(255,255,255,0.1),
                0 0 0 1px rgba(255, 255, 255, 0.05);
    margin-bottom: 20px;
    overflow: hidden;
}

.phone-notch {
    position: absolute;
    top: 0;
    width: 90px;
    height: 12px;
    background: #232c49;
    border-bottom-left-radius: 10px;
    border-bottom-right-radius: 10px;
    z-index: 5;
}

.phone-screen {
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at center, #1b2440 0%, #0c0f1d 100%);
    border-radius: 26px;
    overflow: hidden;
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

/* Scanning Radar Laser Line */
.scan-laser {
    position: absolute;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(to right, rgba(99, 102, 241, 0), var(--secondary), rgba(99, 102, 241, 0));
    box-shadow: 0 0 15px var(--secondary), 0 0 5px var(--secondary);
    z-index: 3;
    pointer-events: none;
    animation: scan-radar 3s infinite ease-in-out;
}

.canvas-container {
    width: 240px;
    height: 240px;
    position: relative;
    z-index: 2;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.4);
    background: white; /* Base canvas fallback */
    transition: var(--transition-smooth);
}

.canvas-container canvas {
    width: 100% !important;
    height: 100% !important;
    display: block;
}

/* Virtual Decoder Status Box */
.decoder-status {
    display: flex;
    align-items: center;
    gap: 12px;
    background: rgba(0,0,0,0.25);
    border: 1px solid var(--border-glass);
    border-radius: var(--radius-sm);
    padding: 10px 16px;
    width: 100%;
    margin-bottom: 24px;
}

.decoder-status .status-msg {
    font-size: 13px;
    font-weight: 600;
    color: var(--text-main);
}

.spinner {
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255,255,255,0.1);
    border-top: 2px solid var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

.success-icon {
    font-size: 16px;
    color: var(--secondary);
    display: none;
}

.warning-icon {
    font-size: 16px;
    color: #f59e0b;
    display: none;
}

/* Premium Export Buttons Grid */
.action-grid {
    display: grid;
    grid-template-columns: 1.2fr 1.2fr 0.6fr;
    gap: 12px;
    width: 100%;
}

.btn {
    border: none;
    outline: none;
    font-family: var(--font-primary);
    font-weight: 700;
    font-size: 13px;
    padding: 14px 10px;
    border-radius: var(--radius-sm);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    transition: var(--transition-spring);
}

.btn i {
    font-size: 15px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, #4f46e5 100%);
    color: white;
    box-shadow: 0 8px 20px rgba(99, 102, 241, 0.35);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 24px rgba(99, 102, 241, 0.45);
}

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

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.1);
    transform: translateY(-2px);
}

.btn-tertiary {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-glass);
    color: var(--text-muted);
}

.btn-tertiary:hover {
    background: rgba(255, 255, 255, 0.1);
    color: white;
    transform: translateY(-2px);
}

/* 9. Validation Guides Card */
.validation-card {
    padding: 24px 30px;
}

.validation-card h3 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 12px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.validation-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.validation-list li {
    font-size: 12px;
    color: var(--text-muted);
    display: flex;
    align-items: start;
    gap: 8px;
}

.validation-list li i {
    margin-top: 3px;
    font-size: 13px;
}

.text-success { color: var(--secondary); }
.text-warning { color: #f59e0b; }
.text-danger { color: #ef4444; }

/* 10. Footer styling */
.app-footer {
    text-align: center;
    padding: 20px 0;
    border-top: 1px solid var(--border-glass);
    margin-top: auto;
}

.app-footer p {
    font-size: 12px;
    color: var(--text-muted);
}

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(6px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideDown {
    from { height: 0; opacity: 0; padding-bottom: 0; }
    to { height: auto; opacity: 1; padding-bottom: 30px; }
}

@keyframes pulse {
    from { transform: scale(0.95); opacity: 0.8; }
    to { transform: scale(1.05); opacity: 1; }
}

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

@keyframes scan-radar {
    0% { top: 0%; opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { top: 100%; opacity: 0; }
}

.animate-fade-in {
    animation: fadeIn 0.8s cubic-bezier(0.25, 0.8, 0.25, 1) forwards;
}

.animate-fade-in-delayed {
    opacity: 0;
    animation: fadeIn 0.8s cubic-bezier(0.25, 0.8, 0.25, 1) 0.2s forwards;
}

.animate-slide-in {
    opacity: 0;
    transform: translateY(20px);
    animation: fadeIn 0.8s cubic-bezier(0.25, 0.8, 0.25, 1) 0.1s forwards;
}

/* ==========================================================================
   Responsive Breakpoints
   ========================================================================== */
@media (max-width: 1024px) {
    .workspace-grid {
        grid-template-columns: 1fr;
        gap: 24px;
    }
    
    .preview-panel {
        position: static;
    }
    
    .phone-mockup {
        width: 320px;
        height: 320px;
    }
    
    .canvas-container {
        width: 270px;
        height: 270px;
    }
}

@media (max-width: 640px) {
    .app-container {
        padding: 20px 12px;
    }
    
    .logo-area h1 {
        font-size: 22px;
    }
    
    .tab-btn span {
        display: none;
    }
    
    .tab-btn {
        padding: 10px;
    }
    
    .tab-content-container {
        padding: 20px 15px;
    }
    
    .preset-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .shortcut-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 6px;
    }
    
    .action-grid {
        grid-template-columns: 1fr;
    }
}