/* ========================================
   ImageForge - Free Online Image Converter
   Enhanced Style CSS - Modern, Professional UI
   ======================================== */

/* ========================================
   CSS Variables - Design Tokens
   ======================================== */
:root {
    /* Primary Colors */
    --primary: #6366F1;
    --primary-light: #818CF8;
    --primary-dark: #4F46E5;
    --primary-glow: rgba(99, 102, 241, 0.4);

    /* Accent Colors */
    --accent: #22D3EE;
    --accent-light: #67E8F9;
    --accent-glow: rgba(34, 211, 238, 0.3);

    /* Semantic Colors */
    --success: #10B981;
    --success-light: #34D399;
    --success-glow: rgba(16, 185, 129, 0.25);
    --warning: #F59E0B;
    --warning-light: #FBBF24;
    --error: #EF4444;
    --error-light: #F87171;

    /* Background Colors */
    --bg-primary: #0A0A14;
    --bg-secondary: #12121F;
    --bg-card: #1A1A2E;
    --bg-card-hover: #22223A;
    --bg-input: #0D0D18;

    /* Text Colors */
    --text-primary: #FFFFFF;
    --text-secondary: #A1A1AA;
    --text-muted: #6B6B7B;
    --text-inverse: #0A0A14;

    /* Border Colors */
    --border: rgba(255, 255, 255, 0.06);
    --border-light: rgba(255, 255, 255, 0.12);
    --border-hover: rgba(255, 255, 255, 0.2);

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 60px rgba(99, 102, 241, 0.2);

    /* Border Radius */
    --radius-xs: 4px;
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 0.15s ease;
    --transition-normal: 0.25s ease;
    --transition-slow: 0.5s cubic-bezier(0.16, 1, 0.3, 1);

    /* Fonts */
    --font-display: 'Outfit', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-body: 'DM Sans', -apple-system, BlinkMacSystemFont, sans-serif;
}

/* ========================================
   Reset & Base Styles
   ======================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* Selection */
::selection {
    background: var(--primary);
    color: white;
}

/* Focus Styles */
:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* ========================================
   Custom Scrollbar
   ======================================== */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-secondary);
    border-radius: var(--radius-full);
}

::-webkit-scrollbar-thumb {
    background: linear-gradient(180deg, var(--primary-dark) 0%, var(--primary) 100%);
    border-radius: var(--radius-full);
    border: 2px solid var(--bg-secondary);
}

::-webkit-scrollbar-thumb:hover {
    background: var(--primary);
}

/* ========================================
   Background Effects
   ======================================== */
.bg-pattern {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        radial-gradient(circle at 20% 20%, rgba(99, 102, 241, 0.04) 0%, transparent 40%),
        radial-gradient(circle at 80% 80%, rgba(34, 211, 238, 0.03) 0%, transparent 40%);
    pointer-events: none;
    z-index: 0;
}

.bg-glow {
    position: fixed;
    top: -30%;
    left: -30%;
    width: 160%;
    height: 160%;
    background: radial-gradient(circle at 50% 50%, var(--primary-glow) 0%, transparent 50%);
    opacity: 0.35;
    pointer-events: none;
    z-index: 0;
    animation: glowPulse 10s ease-in-out infinite;
}

@keyframes glowPulse {
    0%, 100% {
        transform: scale(1);
        opacity: 0.35;
    }
    50% {
        transform: scale(1.15);
        opacity: 0.25;
    }
}

.bg-grid {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, 0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, 0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: 0;
}

/* ========================================
   App Container
   ======================================== */
.app-container {
    position: relative;
    z-index: 1;
    max-width: 1200px;
    margin: 0 auto;
    padding: 32px 24px;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ========================================
   Header
   ======================================== */
.app-header {
    margin-bottom: 40px;
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 20px;
    margin-bottom: 24px;
}

/* Logo */
.logo-wrapper {
    display: flex;
    align-items: center;
    gap: 16px;
}

.logo-icon {
    width: 60px;
    height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary) 0%, #7C3AED 100%);
    border-radius: var(--radius-lg);
    box-shadow:
        0 4px 20px var(--primary-glow),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    animation: logoFloat 4s ease-in-out infinite;
    position: relative;
}

.logo-icon::after {
    content: '';
    position: absolute;
    inset: -2px;
    border-radius: var(--radius-lg);
    background: linear-gradient(135deg, var(--primary) 0%, var(--accent) 100%);
    z-index: -1;
    opacity: 0.5;
    filter: blur(8px);
}

@keyframes logoFloat {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    25% { transform: translateY(-5px) rotate(1deg); }
    75% { transform: translateY(-3px) rotate(-1deg); }
}

.logo-text h1 {
    font-family: var(--font-display);
    font-size: 2rem;
    font-weight: 800;
    letter-spacing: -0.02em;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--primary-light) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.1;
}

.logo-text p {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

/* Header Actions */
.header-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.header-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    font-size: 0.813rem;
    color: var(--text-secondary);
    transition: var(--transition-normal);
}

.header-badge:hover {
    border-color: var(--primary);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

.header-badge.secondary {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.1) 0%, rgba(34, 211, 238, 0.05) 100%);
    border-color: rgba(99, 102, 241, 0.3);
}

.header-badge .badge-icon {
    font-size: 1rem;
}

/* Feature Pills */
.feature-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    justify-content: center;
}

.pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    color: var(--text-muted);
    transition: var(--transition-fast);
}

.pill:hover {
    border-color: var(--primary);
    color: var(--primary-light);
}

/* ========================================
   Main Content
   ======================================== */
.app-main {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 32px;
}

/* Section Headers */
.section-header {
    text-align: center;
    margin-bottom: 24px;
    animation: fadeInUp 0.6s var(--transition-slow);
}

.section-header h2 {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: 8px;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 0.938rem;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ========================================
   Upload Section
   ======================================== */
.upload-section {
    animation: fadeInUp 0.6s var(--transition-slow);
}

.upload-zone {
    position: relative;
    background: var(--bg-card);
    border: 2px dashed var(--border-light);
    border-radius: var(--radius-xl);
    padding: 56px 32px;
    text-align: center;
    cursor: pointer;
    transition: var(--transition-normal);
    overflow: hidden;
}

.upload-zone::before {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(135deg, var(--primary-glow) 0%, transparent 50%);
    opacity: 0;
    transition: var(--transition-normal);
}

.upload-zone::after {
    content: '';
    position: absolute;
    inset: 0;
    background: radial-gradient(circle at center, var(--primary-glow) 0%, transparent 70%);
    opacity: 0;
    transition: var(--transition-normal);
}

.upload-zone:hover {
    border-color: var(--primary);
    border-style: solid;
}

.upload-zone:hover::before {
    opacity: 1;
}

.upload-zone:hover .upload-illustration svg {
    transform: scale(1.1);
    color: var(--primary);
}

.upload-zone.drag-over {
    border-color: var(--primary);
    border-style: solid;
    transform: scale(1.01);
    box-shadow: var(--shadow-glow);
}

.upload-zone.drag-over::after {
    opacity: 1;
}

.upload-content {
    position: relative;
    z-index: 1;
}

.upload-illustration {
    margin-bottom: 20px;
}

.upload-illustration svg {
    color: var(--text-muted);
    transition: var(--transition-normal);
}

.upload-illustration .upload-circle {
    animation: rotate 20s linear infinite;
    transform-origin: center;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.upload-content h3 {
    font-family: var(--font-display);
    font-size: 1.375rem;
    font-weight: 600;
    margin-bottom: 8px;
}

.upload-content p {
    color: var(--text-secondary);
    font-size: 0.938rem;
}

.browse-link {
    color: var(--primary);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-fast);
}

.browse-link:hover {
    color: var(--primary-light);
    text-decoration: underline;
}

.upload-features {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-top: 24px;
}

.upload-feature {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 0.813rem;
    color: var(--text-muted);
}

.feature-icon {
    font-size: 1rem;
}

/* Upload Processing */
.upload-processing {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.spinner-ring {
    width: 48px;
    height: 48px;
    border: 3px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

/* File Info Bar */
.file-info-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 14px 20px;
    margin-top: 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    animation: fadeInUp 0.3s ease;
}

.file-info-left {
    display: flex;
    align-items: center;
    gap: 12px;
}

.file-icon {
    font-size: 1.25rem;
}

.file-count {
    font-size: 0.938rem;
    color: var(--text-secondary);
}

.file-count span {
    color: var(--primary);
    font-weight: 600;
}

.file-info-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.total-size {
    font-size: 0.875rem;
    color: var(--text-muted);
}

.total-size span {
    color: var(--accent);
    font-weight: 600;
}

.btn-clear {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
    border-radius: var(--radius-sm);
    font-size: 0.813rem;
    font-weight: 500;
    color: var(--error);
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-clear:hover {
    background: var(--error);
    color: white;
    border-color: var(--error);
}

/* ========================================
   Settings Panel
   ======================================== */
.settings-panel {
    animation: fadeInUp 0.6s var(--transition-slow) 0.1s both;
}

.settings-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: var(--transition-normal);
    max-width: 100%; /* Ensure card doesn't overflow parent */
}

.slider-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
    width: 100%;
    max-width: 100%;
    overflow: hidden;
}

.settings-card:hover {
    border-color: var(--border-light);
    box-shadow: var(--shadow-lg);
}

.settings-header {
    padding: 24px;
}

.slider-container {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.slider-wrapper {
    position: relative;
    width: 100%;
    height: 32px; /* Height to accommodate thumb and track */
    display: flex;
    align-items: center;
}

.quality-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 8px;
    background: transparent; /* Track is handled by custom div */
    border-radius: var(--radius-full);
    outline: none;
    cursor: pointer;
    position: relative;
    z-index: 2;
    margin: 0;
}

.slider-track {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 8px;
    background: var(--bg-input);
    border-radius: var(--radius-full);
    transform: translateY(-50%);
    pointer-events: none;
    overflow: hidden;
    z-index: 1;
}

.settings-header h3 {
    font-family: var(--font-display);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.settings-subtitle {
    font-size: 0.813rem;
    color: var(--text-muted);
}

.settings-grid {
    padding: 24px;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 32px;
    align-items: start;
}

.setting-group {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.setting-label {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.label-icon {
    font-size: 1.125rem;
}

.quality-value {
    margin-left: auto;
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 700;
    color: var(--primary);
    background: linear-gradient(135deg, var(--primary-glow) 0%, rgba(99, 102, 241, 0.15) 100%);
    padding: 4px 14px;
    border-radius: var(--radius-full);
    border: 1px solid rgba(99, 102, 241, 0.3);
}

/* Format Buttons */
.format-buttons {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 12px;
}

.format-btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
    padding: 18px 12px;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-normal);
    position: relative;
    overflow: hidden;
}

.format-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: var(--primary);
    transform: scaleX(0);
    transition: var(--transition-fast);
}

.format-btn:hover {
    border-color: var(--primary);
    background: var(--bg-card-hover);
    transform: translateY(-2px);
}

.format-btn:hover::before {
    transform: scaleX(1);
}

.format-btn.active {
    border-color: var(--primary);
    background: linear-gradient(180deg, rgba(99, 102, 241, 0.15) 0%, rgba(99, 102, 241, 0.05) 100%);
    box-shadow: 0 4px 20px var(--primary-glow);
}

.format-btn.active::before {
    transform: scaleX(1);
}

.format-icon {
    font-size: 1.5rem;
}

.format-name {
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
}

.format-desc {
    font-size: 0.688rem;
    color: var(--text-muted);
}

.format-btn.active .format-name {
    color: var(--primary-light);
}

/* Quality Slider */
.slider-container {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.slider-track {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 8px;
    background: var(--bg-input);
    border-radius: var(--radius-full);
    transform: translateY(-50%);
    pointer-events: none;
    overflow: hidden; /* Ensure fill doesn't overflow rounded corners */
}

.slider-fill {
    position: absolute;
    top: 0;
    left: 0;
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--primary-light) 100%);
}

.quality-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 8px;
    background: var(--bg-input);
    border-radius: var(--radius-full);
    outline: none;
    cursor: pointer;
    position: relative;
}

.quality-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: 50%;
    cursor: pointer;
    border: 3px solid white;
    box-shadow: 0 2px 10px var(--primary-glow);
    transition: var(--transition-fast);
}

.quality-slider::-webkit-slider-thumb:hover {
    transform: scale(1.15);
    box-shadow: 0 4px 20px var(--primary-glow);
}

.quality-slider::-moz-range-thumb {
    width: 24px;
    height: 24px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-light) 100%);
    border-radius: 50%;
    cursor: pointer;
    border: 3px solid white;
    box-shadow: 0 2px 10px var(--primary-glow);
}

.slider-track {
    position: absolute;
    top: 50%;
    left: 0;
    right: 0;
    height: 8px;
    background: var(--bg-input);
    border-radius: var(--radius-full);
    transform: translateY(-50%);
    pointer-events: none;
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Dimension Inputs */
.dimension-inputs {
    display: flex;
    align-items: center;
    gap: 12px;
}

.input-group {
    flex: 1;
    position: relative;
    display: flex;
    align-items: center;
    background: var(--bg-input);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 0 12px;
    transition: var(--transition-fast);
}

.input-group:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

.input-group label {
    position: absolute;
    top: -9px;
    left: 10px;
    font-size: 0.688rem;
    color: var(--text-muted);
    background: var(--bg-card);
    padding: 0 6px;
}

.input-group input {
    width: 100%;
    background: none;
    border: none;
    padding: 14px 0;
    font-family: var(--font-body);
    font-size: 0.938rem;
    color: var(--text-primary);
    outline: none;
}

.input-group input::placeholder {
    color: var(--text-muted);
}

/* Remove number input arrows */
.input-group input[type="number"]::-webkit-inner-spin-button,
.input-group input[type="number"]::-webkit-outer-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.input-group input[type="number"] {
    -moz-appearance: textfield;
}

.input-suffix {
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-left: 4px;
}

.dimension-separator {
    font-size: 1.25rem;
    font-weight: 300;
    color: var(--text-muted);
}

/* Checkbox */
.checkbox-label {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 0.813rem;
    color: var(--text-secondary);
    cursor: pointer;
    user-select: none;
}

.checkbox-label input {
    display: none;
}

.checkmark {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border-light);
    border-radius: var(--radius-xs);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
}

.checkbox-label input:checked + .checkmark {
    background: var(--primary);
    border-color: var(--primary);
}

.checkbox-label input:checked + .checkmark::after {
    content: '✓';
    color: white;
    font-size: 0.75rem;
    font-weight: 700;
}

.checkbox-label:hover .checkmark {
    border-color: var(--primary);
}

/* Privacy Note */
.privacy-note {
    display: flex;
    align-items: flex-start;
    gap: 14px;
    margin: 0 24px 24px;
    padding: 16px 20px;
    background: linear-gradient(135deg, rgba(34, 211, 238, 0.08) 0%, rgba(34, 211, 238, 0.02) 100%);
    border: 1px solid rgba(34, 211, 238, 0.2);
    border-radius: var(--radius-md);
}

.privacy-icon-wrapper {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(34, 211, 238, 0.1);
    border-radius: var(--radius-sm);
    flex-shrink: 0;
}

.privacy-icon {
    font-size: 1.25rem;
}

.privacy-text strong {
    display: block;
    font-size: 0.875rem;
    color: var(--accent);
    margin-bottom: 4px;
}

.privacy-text p {
    font-size: 0.813rem;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* ========================================
   Action Section
   ======================================== */
.action-section {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    animation: fadeInUp 0.6s var(--transition-slow) 0.2s both;
}

.btn-primary {
    display: flex;
    align-items: center;
    gap: 14px;
    padding: 18px 48px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border: none;
    border-radius: var(--radius-lg);
    font-family: var(--font-display);
    font-size: 1.125rem;
    font-weight: 600;
    color: white;
    cursor: pointer;
    transition: var(--transition-normal);
    box-shadow:
        0 4px 20px var(--primary-glow),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
    position: relative;
    overflow: hidden;
}

.btn-primary::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: var(--transition-slow);
}

.btn-primary:hover:not(:disabled)::before {
    left: 100%;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-3px);
    box-shadow:
        0 8px 30px var(--primary-glow),
        inset 0 1px 0 rgba(255, 255, 255, 0.2);
}

.btn-primary:active:not(:disabled) {
    transform: translateY(-1px);
}

.btn-primary:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-icon {
    font-size: 1.25rem;
}

.btn-badge {
    background: rgba(255, 255, 255, 0.2);
    padding: 4px 12px;
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    backdrop-filter: blur(4px);
}

.action-hint {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.action-hint kbd {
    display: inline-block;
    padding: 2px 8px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xs);
    font-family: var(--font-body);
    font-size: 0.688rem;
}

/* ========================================
   Progress Section
   ======================================== */
.progress-section {
    animation: fadeInUp 0.4s ease;
}

.progress-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    padding: 28px;
}

.progress-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 20px;
}

.progress-title {
    display: flex;
    align-items: center;
    gap: 10px;
    font-family: var(--font-display);
    font-size: 1rem;
    font-weight: 600;
}

.progress-icon {
    font-size: 1.25rem;
    animation: spin 2s linear infinite;
}

.progress-count {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.progress-count span {
    color: var(--primary);
    font-weight: 700;
}

.progress-bar-container {
    position: relative;
    height: 10px;
    background: var(--bg-input);
    border-radius: var(--radius-full);
    overflow: hidden;
    margin-bottom: 16px;
}

.progress-bar {
    height: 100%;
    width: 0%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--accent) 100%);
    border-radius: var(--radius-full);
    transition: width 0.3s ease;
    position: relative;
}

.progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    right: 0;
    width: 60px;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4));
    filter: blur(4px);
}

.progress-bar-glow {
    position: absolute;
    top: 50%;
    left: 0;
    width: 0%;
    height: 20px;
    background: var(--primary);
    filter: blur(20px);
    opacity: 0.5;
    transform: translateY(-50%);
    transition: width 0.3s ease;
    pointer-events: none;
}

.progress-status {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 10px;
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.status-spinner {
    width: 14px;
    height: 14px;
    border: 2px solid var(--border);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

/* ========================================
   Results Section
   ======================================== */
.results-section {
    animation: fadeInUp 0.6s var(--transition-slow);
}

.results-header {
    margin-bottom: 24px;
}

.results-title-row {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 12px;
}

.results-title-row h2 {
    font-family: var(--font-display);
    font-size: 1.75rem;
    font-weight: 700;
}

.results-badge {
    padding: 6px 16px;
    background: linear-gradient(135deg, var(--success) 0%, var(--success-light) 100%);
    border-radius: var(--radius-full);
    font-size: 0.875rem;
    font-weight: 600;
    color: white;
    box-shadow: 0 4px 15px var(--success-glow);
}

.results-summary {
    display: flex;
    align-items: center;
    gap: 16px;
    font-size: 0.938rem;
    color: var(--text-secondary);
}

.summary-item {
    display: flex;
    align-items: center;
    gap: 8px;
}

.summary-icon {
    font-size: 1.125rem;
}

.summary-divider {
    color: var(--text-muted);
}

#totalSaved {
    color: var(--success);
    font-weight: 700;
}

#avgCompression {
    color: var(--accent);
    font-weight: 600;
}

/* Results Actions */
.results-actions {
    display: flex;
    gap: 12px;
    margin-bottom: 24px;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border: none;
    border-radius: var(--radius-md);
    font-family: var(--font-display);
    font-size: 0.938rem;
    font-weight: 600;
    color: white;
    cursor: pointer;
    transition: var(--transition-normal);
    box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-secondary:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px var(--primary-glow);
}

.btn-secondary:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.btn-outline {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    background: transparent;
    border: 1px solid var(--border-light);
    border-radius: var(--radius-md);
    font-family: var(--font-display);
    font-size: 0.938rem;
    font-weight: 500;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition-normal);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary-light);
    background: rgba(99, 102, 241, 0.05);
}

/* Results Grid */
.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

/* Result Card */
.result-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: var(--transition-normal);
    animation: cardEnter 0.4s ease both;
}

@keyframes cardEnter {
    from {
        opacity: 0;
        transform: translateY(20px) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

.result-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.result-preview {
    position: relative;
    height: 180px;
    background: var(--bg-input);
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
}

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

.result-card:hover .result-preview img {
    transform: scale(1.05);
}

.result-badge {
    position: absolute;
    top: 12px;
    right: 12px;
    padding: 6px 14px;
    background: linear-gradient(135deg, var(--success) 0%, var(--success-light) 100%);
    border-radius: var(--radius-full);
    font-size: 0.75rem;
    font-weight: 700;
    color: white;
    box-shadow: 0 2px 10px var(--success-glow);
}

.result-info {
    padding: 18px;
}

.result-name {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 14px;
    word-break: break-all;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.result-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin-bottom: 16px;
}

.stat-item {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.stat-label {
    font-size: 0.625rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.stat-value {
    font-size: 0.813rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.stat-value.saved {
    color: var(--success);
}

.result-actions {
    display: flex;
    gap: 8px;
}

.btn-download {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 12px 16px;
    background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
    border: none;
    border-radius: var(--radius-sm);
    font-family: var(--font-display);
    font-size: 0.813rem;
    font-weight: 600;
    color: white;
    cursor: pointer;
    transition: var(--transition-fast);
}

.btn-download:hover {
    background: var(--primary-light);
    transform: translateY(-2px);
}

/* ========================================
   Empty State
   ======================================== */
.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 80px 20px;
    text-align: center;
    animation: fadeInUp 0.6s ease 0.3s both;
}

.empty-illustration {
    color: var(--text-muted);
    margin-bottom: 32px;
    opacity: 0.4;
}

.empty-illustration svg {
    animation: float 4s ease-in-out infinite;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-10px); }
}

.empty-state h3 {
    font-family: var(--font-display);
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 12px;
}

.empty-state p {
    color: var(--text-secondary);
    font-size: 0.938rem;
    max-width: 450px;
    line-height: 1.6;
    margin-bottom: 32px;
}

.empty-features {
    display: flex;
    justify-content: center;
    gap: 32px;
    flex-wrap: wrap;
}

.empty-feature {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    padding: 16px 24px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    transition: var(--transition-normal);
}

.empty-feature:hover {
    border-color: var(--primary);
    transform: translateY(-4px);
}

.empty-feature .feature-icon {
    font-size: 1.5rem;
}

.empty-feature span {
    font-size: 0.813rem;
    color: var(--text-secondary);
}

/* ========================================
   Footer
   ======================================== */
.app-footer {
    margin-top: auto;
    padding: 40px 0 20px;
}

.footer-content {
    text-align: center;
}

.footer-brand {
    font-family: var(--font-display);
    font-size: 0.938rem;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 6px;
}

.footer-tech {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* ========================================
   Utilities
   ======================================== */
[hidden] {
    display: none !important;
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 900px) {
    .settings-grid {
        grid-template-columns: 1fr;
        gap: 28px;
    }
}

@media (max-width: 768px) {
    .app-container {
        padding: 20px 16px;
    }

    .header-content {
        flex-direction: column;
        align-items: flex-start;
    }

    .header-actions {
        width: 100%;
        justify-content: flex-start;
    }

    .feature-pills {
        justify-content: flex-start;
        overflow-x: auto;
        flex-wrap: nowrap;
        padding-bottom: 8px;
    }

    .upload-zone {
        padding: 40px 20px;
    }

    .upload-features {
        flex-direction: column;
        gap: 12px;
    }

    .format-buttons {
        gap: 8px;
    }

    .format-btn {
        padding: 14px 8px;
    }

    .btn-primary {
        width: 100%;
        justify-content: center;
    }

    .results-actions {
        flex-direction: column;
    }

    .results-grid {
        grid-template-columns: 1fr;
    }

    .result-stats {
        grid-template-columns: repeat(2, 1fr);
    }

    .empty-features {
        flex-direction: column;
        align-items: center;
    }
}

@media (max-width: 480px) {
    .logo-text h1 {
        font-size: 1.5rem;
    }

    .logo-icon {
        width: 48px;
        height: 48px;
    }

    .dimension-inputs {
        flex-direction: column;
        gap: 8px;
    }

    .dimension-separator {
        display: none;
    }

    .input-group {
        width: 100%;
    }

    .header-badge {
        padding: 6px 12px;
        font-size: 0.75rem;
    }

    .file-info-bar {
        flex-direction: column;
        gap: 12px;
        align-items: flex-start;
    }

    .file-info-right {
        width: 100%;
        justify-content: space-between;
    }
}

/* ========================================
   Print Styles
   ======================================== */
@media print {
    .bg-pattern,
    .bg-glow,
    .bg-grid {
        display: none;
    }

    body {
        background: white;
        color: black;
    }

    .app-container {
        max-width: 100%;
    }

    .settings-card,
    .result-card {
        break-inside: avoid;
    }
}