/* ============================================
   LocalConverter — Modern Premium Design System
   ============================================ */

:root {
    /* Core Palette */
    --bg-base: #0a0a0f;
    --bg-surface: rgba(18, 18, 28, 0.85);
    --bg-elevated: rgba(28, 28, 42, 0.75);
    --bg-hover: rgba(40, 40, 60, 0.6);

    /* Glass */
    --glass-bg: rgba(255, 255, 255, 0.04);
    --glass-border: rgba(255, 255, 255, 0.08);
    --glass-hover-border: rgba(255, 255, 255, 0.15);

    /* Text */
    --text-primary: #f0f0f5;
    --text-secondary: #8888a0;
    --text-muted: #555570;

    /* Accent Gradients */
    --accent-primary: #6366f1;
    --accent-secondary: #a855f7;
    --accent-gradient: linear-gradient(135deg, #6366f1 0%, #a855f7 50%, #ec4899 100%);
    --accent-gradient-subtle: linear-gradient(135deg, rgba(99, 102, 241, 0.15) 0%, rgba(168, 85, 247, 0.15) 100%);

    /* Category Colors */
    --color-images: #6366f1;
    --color-docs: #10b981;
    --color-video: #f59e0b;

    /* Status */
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;

    /* Spacing */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 20px;
    --radius-2xl: 24px;

    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(99, 102, 241, 0.15);

    /* Transitions */
    --transition-fast: 0.15s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-base);
    color: var(--text-primary);
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    line-height: 1.6;
    min-height: 100vh;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ============================================
   Animated Background Orbs
   ============================================ */
.bg-orbs {
    position: fixed;
    inset: 0;
    z-index: 0;
    overflow: hidden;
    pointer-events: none;
}

.orb {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.35;
    animation: orbFloat 20s ease-in-out infinite;
}

.orb-1 {
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, #6366f1 0%, transparent 70%);
    top: -10%;
    left: -5%;
    animation-delay: 0s;
}

.orb-2 {
    width: 400px;
    height: 400px;
    background: radial-gradient(circle, #a855f7 0%, transparent 70%);
    top: 50%;
    right: -8%;
    animation-delay: -7s;
}

.orb-3 {
    width: 350px;
    height: 350px;
    background: radial-gradient(circle, #ec4899 0%, transparent 70%);
    bottom: -5%;
    left: 30%;
    animation-delay: -14s;
}

@keyframes orbFloat {

    0%,
    100% {
        transform: translate(0, 0) scale(1);
    }

    25% {
        transform: translate(40px, -30px) scale(1.05);
    }

    50% {
        transform: translate(-20px, 50px) scale(0.95);
    }

    75% {
        transform: translate(30px, 20px) scale(1.02);
    }
}

/* ============================================
   App Wrapper
   ============================================ */
.app-wrapper {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    min-height: 100vh;
}

/* ============================================
   Navigation Bar
   ============================================ */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(20px) saturate(1.5);
    -webkit-backdrop-filter: blur(20px) saturate(1.5);
    background: rgba(10, 10, 15, 0.7);
    border-bottom: 1px solid var(--glass-border);
    transition: var(--transition-base);
}

.nav-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0.85rem 2rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    text-decoration: none;
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary);
    transition: var(--transition-fast);
}

.nav-logo:hover {
    opacity: 0.85;
}

.nav-links {
    display: flex;
    gap: 0.5rem;
}

.nav-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.nav-link:hover {
    color: var(--text-primary);
    background: var(--glass-bg);
}

/* Mobile Toggle */
.nav-mobile-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.nav-mobile-toggle span {
    width: 22px;
    height: 2px;
    background: var(--text-secondary);
    border-radius: 2px;
    transition: var(--transition-base);
}

.mobile-menu {
    display: none;
    flex-direction: column;
    padding: 0 2rem 1rem;
    gap: 0.25rem;
}

.mobile-menu.open {
    display: flex;
}

.mobile-link {
    text-decoration: none;
    color: var(--text-secondary);
    font-size: 0.9rem;
    font-weight: 500;
    padding: 0.75rem 1rem;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.mobile-link:hover {
    color: var(--text-primary);
    background: var(--glass-bg);
}

/* ============================================
   Hero Section
   ============================================ */
.hero {
    text-align: center;
    padding: 5rem 2rem 3.5rem;
    max-width: 800px;
    margin: 0 auto;
    animation: fadeUp 0.8s var(--transition-base);
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.4rem 1rem;
    border-radius: 50px;
    background: var(--accent-gradient-subtle);
    border: 1px solid rgba(99, 102, 241, 0.25);
    color: #a5b4fc;
    font-size: 0.8rem;
    font-weight: 500;
    margin-bottom: 1.5rem;
    letter-spacing: 0.02em;
}

.hero-title {
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    font-weight: 800;
    line-height: 1.15;
    letter-spacing: -0.03em;
    margin-bottom: 1.25rem;
}

.gradient-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
    line-height: 1.7;
    max-width: 560px;
    margin: 0 auto 2rem;
}

.hero-cta {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.85rem 2rem;
    background: var(--accent-gradient);
    color: white;
    border: none;
    border-radius: 50px;
    font-size: 1rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    transition: var(--transition-base);
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.35);
}

.hero-cta:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(99, 102, 241, 0.5);
}

/* ============================================
   Formats Section
   ============================================ */
.formats-section {
    max-width: 1100px;
    margin: 0 auto;
    padding: 2rem 2rem 3rem;
}

.section-title {
    font-size: 1.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: 2rem;
    letter-spacing: -0.02em;
}

.formats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.25rem;
}

.format-card {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: 1.75rem;
    transition: var(--transition-base);
}

.format-card:hover {
    background: var(--bg-hover);
    border-color: var(--glass-hover-border);
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.format-card-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1rem;
}

.format-card-images .format-card-icon {
    background: rgba(99, 102, 241, 0.15);
    color: #818cf8;
}

.format-card-docs .format-card-icon {
    background: rgba(16, 185, 129, 0.15);
    color: #34d399;
}

.format-card-video .format-card-icon {
    background: rgba(245, 158, 11, 0.15);
    color: #fbbf24;
}

.format-card h3 {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.format-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.format-tag {
    font-size: 0.72rem;
    font-weight: 600;
    padding: 0.3rem 0.65rem;
    border-radius: 6px;
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-secondary);
    letter-spacing: 0.03em;
    text-transform: uppercase;
}

.format-card-images .format-tag {
    color: #a5b4fc;
    background: rgba(99, 102, 241, 0.1);
}

.format-card-docs .format-tag {
    color: #6ee7b7;
    background: rgba(16, 185, 129, 0.1);
}

.format-card-video .format-tag {
    color: #fde68a;
    background: rgba(245, 158, 11, 0.1);
}

/* ============================================
   Converter Section
   ============================================ */
.converter-section {
    max-width: 1100px;
    margin: 0 auto;
    padding: 2rem 2rem 3rem;
}

/* ============================================
   Drop Zone
   ============================================ */
.drop-zone {
    border: 2px dashed rgba(99, 102, 241, 0.3);
    border-radius: var(--radius-2xl);
    padding: 3.5rem 2rem;
    text-align: center;
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    transition: var(--transition-base);
    cursor: pointer;
    position: relative;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 550px;
    height: 550px;
    max-width: 100%;
    margin: 0 auto;
}

.drop-zone::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--accent-gradient);
    opacity: 0;
    transition: var(--transition-base);
    pointer-events: none;
}

.drop-zone:hover,
.drop-zone.drag-over {
    border-color: var(--accent-primary);
    background: rgba(99, 102, 241, 0.06);
}

.drop-zone:hover::before,
.drop-zone.drag-over::before {
    opacity: 0.04;
}

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

.drop-icon-wrapper {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.25rem;
    border-radius: 50%;
    background: var(--accent-gradient-subtle);
    display: flex;
    align-items: center;
    justify-content: center;
    animation: gentlePulse 3s ease-in-out infinite;
}

@keyframes gentlePulse {

    0%,
    100% {
        transform: scale(1);
        box-shadow: 0 0 0 0 rgba(99, 102, 241, 0.2);
    }

    50% {
        transform: scale(1.04);
        box-shadow: 0 0 30px 10px rgba(99, 102, 241, 0.1);
    }
}

.drop-content h3 {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 0.3rem;
}

.drop-content p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.drop-browse {
    color: #818cf8;
    font-weight: 500;
    text-decoration: underline;
    text-underline-offset: 2px;
}

/* ============================================
   Image Options Panel
   ============================================ */
.image-options-panel {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    margin-top: 1.25rem;
    overflow: hidden;
    animation: slideDown 0.4s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-12px);
        max-height: 0;
    }

    to {
        opacity: 1;
        transform: translateY(0);
        max-height: 1000px;
    }
}

.panel-header {
    padding: 1.25rem 1.5rem;
    border-bottom: 1px solid var(--glass-border);
}

.panel-title-row {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    color: var(--text-primary);
}

.panel-title-row h3 {
    font-size: 0.95rem;
    font-weight: 600;
}

.panel-title-row svg {
    color: var(--accent-primary);
}

.panel-body {
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1.75rem;
}

/* Option Blocks */
.option-block {
    display: flex;
    flex-direction: column;
    gap: 0.65rem;
}

.option-label {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 0.6rem;
}

.option-hint {
    font-size: 0.78rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* Mode Switcher (Lossy/Lossless) */
.mode-switcher {
    display: flex;
    background: rgba(255, 255, 255, 0.04);
    border-radius: var(--radius-md);
    padding: 4px;
    gap: 4px;
    border: 1px solid var(--glass-border);
}

.mode-btn {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.65rem 1rem;
    border: none;
    border-radius: var(--radius-sm);
    background: transparent;
    color: var(--text-secondary);
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition-fast);
}

.mode-btn:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.04);
}

.mode-btn.active {
    background: var(--accent-gradient);
    color: white;
    box-shadow: 0 2px 10px rgba(99, 102, 241, 0.35);
}

/* Quality Slider */
.quality-badge {
    font-size: 0.75rem;
    padding: 0.15rem 0.55rem;
    border-radius: 50px;
    background: var(--accent-gradient);
    color: white;
    font-weight: 600;
    margin-left: auto;
}

.slider-wrapper {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.custom-slider {
    -webkit-appearance: none;
    appearance: none;
    width: 100%;
    height: 6px;
    border-radius: 3px;
    background: rgba(255, 255, 255, 0.08);
    outline: none;
    transition: var(--transition-fast);
}

.custom-slider::-webkit-slider-thumb {
    -webkit-appearance: none;
    appearance: none;
    width: 20px;
    height: 20px;
    border-radius: 50%;
    background: var(--accent-gradient);
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
    transition: var(--transition-fast);
}

.custom-slider::-webkit-slider-thumb:hover {
    transform: scale(1.2);
    box-shadow: 0 4px 16px rgba(99, 102, 241, 0.5);
}

.custom-slider::-moz-range-thumb {
    width: 20px;
    height: 20px;
    border: none;
    border-radius: 50%;
    background: var(--accent-gradient);
    cursor: pointer;
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.4);
}

.slider-labels {
    display: flex;
    justify-content: space-between;
    font-size: 0.7rem;
    color: var(--text-muted);
    padding: 0 2px;
}

/* Resize Controls */
.modern-select {
    width: 100%;
    padding: 0.7rem 1rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.85rem;
    cursor: pointer;
    transition: var(--transition-fast);
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%238888a0' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 1rem center;
    padding-right: 2.5rem;
}

.modern-select:hover,
.modern-select:focus {
    border-color: var(--accent-primary);
    outline: none;
}

.modern-select option {
    background: var(--bg-base);
    color: var(--text-primary);
}

.custom-resize-fields {
    margin-top: 0.75rem;
    animation: slideDown 0.3s ease;
}

.dimension-inputs {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.dim-field {
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 0.35rem;
}

.dim-field label {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-weight: 500;
}

.modern-input {
    width: 100%;
    padding: 0.6rem 0.85rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.85rem;
    transition: var(--transition-fast);
}

.modern-input:focus {
    border-color: var(--accent-primary);
    outline: none;
    box-shadow: 0 0 0 3px rgba(99, 102, 241, 0.15);
}

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

.link-icon {
    color: var(--text-muted);
    flex-shrink: 0;
    margin-top: 1.2rem;
}

.checkbox-label {
    display: flex;
    align-items: center;
    gap: 0.6rem;
    margin-top: 0.75rem;
    cursor: pointer;
    font-size: 0.82rem;
    color: var(--text-secondary);
    user-select: none;
}

.checkbox-label input[type="checkbox"] {
    display: none;
}

.custom-checkbox {
    width: 18px;
    height: 18px;
    border: 2px solid var(--glass-border);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--transition-fast);
    flex-shrink: 0;
}

.checkbox-label input[type="checkbox"]:checked+.custom-checkbox {
    background: var(--accent-gradient);
    border-color: transparent;
}

.checkbox-label input[type="checkbox"]:checked+.custom-checkbox::after {
    content: '✓';
    color: white;
    font-size: 0.7rem;
    font-weight: 700;
}

/* ============================================
   File List
   ============================================ */
.file-list-container {
    background: var(--glass-bg);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-xl);
    padding: 1.5rem;
    margin-top: 1.25rem;
    animation: fadeUp 0.4s ease;
}

.list-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--glass-border);
}

.list-header h2 {
    font-size: 1.05rem;
    font-weight: 600;
}

.ghost-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    background: none;
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #f87171;
    font-family: inherit;
    font-size: 0.8rem;
    font-weight: 500;
    padding: 0.45rem 0.9rem;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: var(--transition-fast);
}

.ghost-btn:hover {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.5);
}

.file-list {
    list-style: none;
    max-height: 400px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: rgba(255, 255, 255, 0.1) transparent;
}

.file-list::-webkit-scrollbar {
    width: 5px;
}

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

.file-list::-webkit-scrollbar-thumb {
    background: rgba(255, 255, 255, 0.1);
    border-radius: 3px;
}

.file-item {
    display: grid;
    grid-template-columns: auto 1fr auto auto;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid transparent;
    border-radius: var(--radius-md);
    margin-bottom: 0.5rem;
    animation: fadeUp 0.3s ease;
    transition: var(--transition-fast);
}

.file-item:hover {
    background: rgba(255, 255, 255, 0.04);
    border-color: var(--glass-border);
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(12px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.file-icon {
    width: 44px;
    height: 44px;
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.7rem;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.file-icon-img {
    background: rgba(99, 102, 241, 0.15);
    color: #818cf8;
}

.file-icon-vid {
    background: rgba(245, 158, 11, 0.15);
    color: #fbbf24;
}

.file-icon-doc {
    background: rgba(16, 185, 129, 0.15);
    color: #34d399;
}

.file-icon-default {
    background: rgba(255, 255, 255, 0.08);
    color: var(--text-secondary);
}

.file-info h4 {
    font-size: 0.9rem;
    font-weight: 500;
    margin-bottom: 0.15rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    max-width: 250px;
}

.file-info p {
    font-size: 0.75rem;
    color: var(--text-muted);
}

.conversion-controls {
    display: flex;
    gap: 0.5rem;
    align-items: center;
}

.conversion-controls select {
    padding: 0.5rem 0.85rem;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid var(--glass-border);
    border-radius: var(--radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.82rem;
    cursor: pointer;
    transition: var(--transition-fast);
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' viewBox='0 0 24 24' fill='none' stroke='%238888a0' stroke-width='2'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.6rem center;
    padding-right: 2rem;
}

.conversion-controls select:hover {
    border-color: var(--accent-primary);
}

.conversion-controls select option {
    background: var(--bg-base);
    color: var(--text-primary);
}

.btn-remove {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    font-size: 1.2rem;
    padding: 0.4rem;
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
}

.btn-remove:hover {
    color: var(--error);
    background: rgba(239, 68, 68, 0.1);
}

/* Status */
.status-badge {
    padding: 0.3rem 0.7rem;
    border-radius: 50px;
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: 0.03em;
}

.status-error {
    background: rgba(239, 68, 68, 0.15);
    color: #f87171;
}

.download-btn {
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    padding: 0.5rem 1rem;
    background: linear-gradient(135deg, #10b981, #059669);
    color: white;
    border: none;
    border-radius: var(--radius-sm);
    font-family: inherit;
    font-size: 0.82rem;
    font-weight: 600;
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition-fast);
}

.download-btn:hover {
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
}

/* Actions */
.actions {
    margin-top: 1rem;
}

.primary-btn {
    width: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.6rem;
    padding: 0.85rem 1.5rem;
    background: var(--accent-gradient);
    color: white;
    border: none;
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-base);
    box-shadow: 0 4px 20px rgba(99, 102, 241, 0.25);
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(99, 102, 241, 0.4);
}

.primary-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
    transform: none;
}

/* ============================================
   Footer
   ============================================ */
.site-footer {
    margin-top: auto;
    border-top: 1px solid var(--glass-border);
    background: rgba(10, 10, 15, 0.5);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
}

.footer-inner {
    max-width: 1100px;
    margin: 0 auto;
    padding: 1.5rem 2rem;
    text-align: center;
}

.site-footer p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.site-footer a {
    color: #a5b4fc;
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition-fast);
}

.site-footer a:hover {
    color: #c4b5fd;
    text-decoration: underline;
}

/* ============================================
   Toast Notifications
   ============================================ */
#toast-container {
    position: fixed;
    bottom: 24px;
    right: 24px;
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.toast {
    background: var(--bg-surface);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--glass-border);
    border-left: 4px solid var(--accent-primary);
    padding: 1rem 1.25rem;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    animation: toastIn 0.4s cubic-bezier(0.16, 1, 0.3, 1);
    min-width: 280px;
    font-size: 0.85rem;
}

.toast-error {
    border-left-color: var(--error);
}

.toast-success {
    border-left-color: var(--success);
}

@keyframes toastIn {
    from {
        transform: translateX(100%) scale(0.9);
        opacity: 0;
    }

    to {
        transform: translateX(0) scale(1);
        opacity: 1;
    }
}

/* ============================================
   Responsive
   ============================================ */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .nav-mobile-toggle {
        display: flex;
    }

    .hero {
        padding: 3.5rem 1.5rem 2.5rem;
    }

    .hero-title {
        font-size: 2rem;
    }

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

    .converter-section {
        padding: 0 1.25rem 2rem;
    }

    .drop-zone {
        width: 100%;
        height: auto;
    }
}

@media (max-width: 600px) {
    .file-item {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 0.75rem;
    }

    .file-icon {
        margin: 0 auto;
    }

    .file-info h4 {
        max-width: 100%;
    }

    .conversion-controls {
        flex-direction: column;
        width: 100%;
    }

    .conversion-controls select {
        width: 100%;
    }

    .dimension-inputs {
        flex-direction: column;
    }

    .link-icon {
        display: none;
    }

    .drop-zone {
        width: 100%;
        height: auto;
        padding: 2.5rem 1.5rem;
    }
}