/* Modern CSS Reset & Base */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --bg-primary: #020617;
    --bg-secondary: #0f172a;
    --bg-card: rgba(255, 255, 255, 0.03);
    --text-primary: #ffffff;
    --text-secondary: #94a3b8;
    --accent-blue: #3b82f6;
    --accent-purple: #8b5cf6;
    --accent-pink: #ec4899;
    --success: #22c55e;
    --warning: #f59e0b;
    --error: #ef4444;
    --glass: rgba(255, 255, 255, 0.05);
    --glass-border: rgba(255, 255, 255, 0.1);
    --shadow-glow: 0 0 40px rgba(139, 92, 246, 0.3);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.light-mode {
    --bg-primary: #f8fafc;
    --bg-secondary: #ffffff;
    --bg-card: rgba(0, 0, 0, 0.02);
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --glass: rgba(0, 0, 0, 0.03);
    --glass-border: rgba(0, 0, 0, 0.08);
}

html {
    scroll-behavior: smooth;
    background-color: var(--bg-primary);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: var(--transition);
    opacity: 0;
    visibility: hidden;
}

body.ready {
    opacity: 1;
    visibility: visible;
}

/* Animated Background */
.bg-animation {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    pointer-events: none;
    z-index: -1;
    overflow: hidden;
}

.gradient-sphere {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    opacity: 0.4;
    animation: float 20s infinite ease-in-out;
}

.sphere-1 {
    width: 600px;
    height: 600px;
    background: var(--accent-blue);
    top: -200px;
    right: -200px;
    animation-delay: 0s;
}

.sphere-2 {
    width: 400px;
    height: 400px;
    background: var(--accent-purple);
    bottom: -100px;
    left: -100px;
    animation-delay: -5s;
}

.sphere-3 {
    width: 300px;
    height: 300px;
    background: var(--accent-pink);
    top: 50%;
    left: 50%;
    animation-delay: -10s;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -30px) scale(1.1); }
    66% { transform: translate(-20px, 20px) scale(0.9); }
}

/* Navigation */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 2rem;
    background: var(--glass);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--glass-border);
    z-index: 1000;
    transition: var(--transition);
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 0.75rem;
}

.logo-wrapper {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 0 20px rgba(59, 130, 246, 0.3);
}

.logo-svg {
    width: 100%;
    height: 100%;
}

.logo-section h1 {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.pro-badge {
    font-size: 0.6rem;
    background: linear-gradient(135deg, var(--accent-purple), var(--accent-pink));
    color: white;
    padding: 0.2rem 0.5rem;
    border-radius: 4px;
    -webkit-text-fill-color: white;
    font-weight: 600;
}

nav {
    display: flex;
    gap: 2rem;
}

nav a {
    color: var(--text-secondary);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    position: relative;
    transition: var(--transition);
}

nav a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
    transition: width 0.3s;
}

nav a:hover, nav a.active {
    color: var(--text-primary);
}

nav a:hover::after, nav a.active::after {
    width: 100%;
}

.theme-toggle {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    color: var(--text-primary);
    width: 40px;
    height: 40px;
    border-radius: 10px;
    cursor: pointer;
    font-size: 1.2rem;
    transition: var(--transition);
}

.theme-toggle:hover {
    transform: rotate(180deg);
    background: var(--accent-purple);
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 6rem 4rem 4rem;
    position: relative;
    overflow: hidden;
}

.hero-content {
    max-width: 600px;
    z-index: 2;
}

.badge {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.85rem;
    color: var(--accent-pink);
    margin-bottom: 1.5rem;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.7; }
}

.hero h2 {
    font-size: 4rem;
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent-blue) 50%, var(--accent-purple) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    position: relative;
}

.glitch-text::before {
    content: attr(data-text);
    position: absolute;
    left: 2px;
    text-shadow: -2px 0 var(--accent-pink);
    clip: rect(44px, 450px, 56px, 0);
    animation: glitch-anim 5s infinite linear alternate-reverse;
}

@keyframes glitch-anim {
    0% { clip: rect(31px, 9999px, 94px, 0); }
    20% { clip: rect(78px, 9999px, 20px, 0); }
    40% { clip: rect(15px, 9999px, 63px, 0); }
    60% { clip: rect(89px, 9999px, 35px, 0); }
    80% { clip: rect(42px, 9999px, 76px, 0); }
    100% { clip: rect(67px, 9999px, 12px, 0); }
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 500px;
}

.hero-stats {
    display: flex;
    gap: 2rem;
    margin-bottom: 2.5rem;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--accent-blue);
}

.stat-label {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.hero-actions {
    display: flex;
    gap: 1rem;
}

/* Buttons */
.primary-btn {
    position: relative;
    padding: 1rem 2rem;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    color: white;
    border: none;
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    overflow: hidden;
    transition: var(--transition);
    box-shadow: 0 0 30px rgba(59, 130, 246, 0.4);
}

.primary-btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 10px 40px rgba(139, 92, 246, 0.5);
}

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

.btn-glow {
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.3) 0%, transparent 70%);
    opacity: 0;
    transition: opacity 0.3s;
}

.primary-btn:hover .btn-glow {
    opacity: 1;
}

.secondary-btn {
    padding: 1rem 2rem;
    background: var(--glass);
    color: var(--text-primary);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.secondary-btn:hover {
    background: var(--glass-border);
    transform: translateY(-2px);
}

/* Hero Visual */
.hero-visual {
    position: relative;
    width: 400px;
    height: 400px;
}

.floating-cards {
    position: relative;
    width: 100%;
    height: 100%;
}

.float-card {
    position: absolute;
    background: var(--glass);
    backdrop-filter: blur(10px);
    border: 1px solid var(--glass-border);
    padding: 1rem 1.5rem;
    border-radius: 16px;
    font-weight: 600;
    box-shadow: 0 10px 40px rgba(0,0,0,0.2);
    animation: float-card 6s infinite ease-in-out;
}

.card-1 {
    top: 20%;
    left: 10%;
    animation-delay: 0s;
}

.card-2 {
    top: 50%;
    right: 10%;
    animation-delay: -2s;
}

.card-3 {
    bottom: 20%;
    left: 20%;
    animation-delay: -4s;
}

@keyframes float-card {
    0%, 100% { transform: translateY(0) rotate(0deg); }
    50% { transform: translateY(-20px) rotate(2deg); }
}

/* Converter Section */
.converter-section {
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.section-header {
    text-align: center;
    margin-bottom: 3rem;
}

.section-header h2 {
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

.converter-container {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 2rem;
    backdrop-filter: blur(10px);
}

/* Upload Zone */
.upload-zone {
    border: 2px dashed var(--glass-border);
    border-radius: 20px;
    padding: 4rem 2rem;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.upload-zone::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.1), transparent);
    transition: left 0.5s;
}

.upload-zone:hover::before {
    left: 100%;
}

.upload-zone.dragover {
    border-color: var(--accent-blue);
    background: rgba(59, 130, 246, 0.05);
    transform: scale(1.02);
}

.upload-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    color: var(--accent-blue);
    animation: bounce 2s infinite;
}

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

.upload-content h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.upload-content p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.upload-features {
    display: flex;
    justify-content: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.upload-features span {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

/* File Manager */
.file-manager {
    margin-top: 2rem;
}

.manager-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--glass-border);
}

.manager-header h3 {
    font-size: 1.1rem;
    color: var(--text-secondary);
}

.manager-actions {
    display: flex;
    gap: 0.5rem;
}

.icon-btn {
    width: 36px;
    height: 36px;
    border-radius: 8px;
    border: 1px solid var(--glass-border);
    background: var(--glass);
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

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

/* File List */
.file-list {
    display: grid;
    gap: 1rem;
    max-height: 400px;
    overflow-y: auto;
    padding-right: 0.5rem;
}

.file-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 1rem;
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    transition: var(--transition);
    animation: slideIn 0.3s ease-out;
}

@keyframes slideIn {
    from {
        opacity: 0;
        transform: translateX(-20px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.file-item:hover {
    border-color: var(--accent-blue);
    transform: translateX(5px);
}

.file-preview {
    width: 60px;
    height: 60px;
    border-radius: 8px;
    object-fit: cover;
    border: 1px solid var(--glass-border);
}

.file-info {
    flex: 1;
    min-width: 0;
}

.file-name {
    font-weight: 600;
    margin-bottom: 0.25rem;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-meta {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.file-actions {
    display: flex;
    gap: 0.5rem;
}

.file-btn {
    width: 32px;
    height: 32px;
    border-radius: 6px;
    border: none;
    background: transparent;
    color: var(--text-secondary);
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.file-btn:hover {
    background: var(--glass-border);
    color: var(--text-primary);
}

.file-btn.delete:hover {
    background: var(--error);
    color: white;
}

.file-btn:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

/* Conversion Settings */
.conversion-settings {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin: 2rem 0;
    padding: 1.5rem;
    background: var(--glass);
    border-radius: 16px;
    border: 1px solid var(--glass-border);
}

.setting-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
}

.quality-slider {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.quality-slider input[type="range"] {
    flex: 1;
    height: 6px;
    border-radius: 3px;
    background: var(--glass-border);
    outline: none;
    -webkit-appearance: none;
}

.quality-slider input[type="range"]::-webkit-slider-thumb {
    -webkit-appearance: none;
    width: 18px;
    height: 18px;
    border-radius: 50%;
    background: var(--accent-blue);
    cursor: pointer;
    box-shadow: 0 0 10px rgba(59, 130, 246, 0.5);
}

select {
    width: 100%;
    padding: 0.75rem;
    border-radius: 8px;
    border: 1px solid var(--glass-border);
    background: #000000;
    color: #ffffff;
    font-size: 0.9rem;
    cursor: pointer;
}

select option {
    background: #000000;
    color: #ffffff;
}

.toggle-group {
    display: flex;
    gap: 0.5rem;
}

.toggle-btn {
    flex: 1;
    padding: 0.5rem;
    border: 1px solid var(--glass-border);
    background: var(--glass);
    color: var(--text-secondary);
    border-radius: 8px;
    cursor: pointer;
    transition: var(--transition);
    font-size: 0.85rem;
}

.toggle-btn.active {
    background: var(--accent-blue);
    color: white;
    border-color: var(--accent-blue);
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.checkbox {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    cursor: pointer;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.checkbox input {
    width: 18px;
    height: 18px;
    accent-color: var(--accent-blue);
}

/* Action Bar */
.action-bar {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

.filename-input-wrapper {
    flex: 1;
    min-width: 200px;
    position: relative;
}

.filename-input-wrapper input {
    width: 100%;
    padding: 1rem 3rem 1rem 1rem;
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    background: var(--glass);
    color: var(--text-primary);
    font-size: 1rem;
}

.input-hint {
    position: absolute;
    right: 1rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--text-secondary);
    font-size: 0.9rem;
    pointer-events: none;
}

.convert-btn {
    min-width: 180px;
    height: 56px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-loader {
    width: 20px;
    height: 20px;
    border: 2px solid transparent;
    border-top-color: white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Progress Overlay */
.progress-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(2, 6, 23, 0.9);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
}

.progress-card {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 3rem;
    text-align: center;
    min-width: 300px;
}

.progress-ring {
    position: relative;
    width: 120px;
    height: 120px;
    margin: 0 auto 1.5rem;
}

.progress-ring svg {
    transform: rotate(-90deg);
    width: 100%;
    height: 100%;
}

.progress-bg {
    fill: none;
    stroke: var(--glass-border);
    stroke-width: 8;
}

.progress-bar {
    fill: none;
    stroke: url(#progressGradient);
    stroke-width: 8;
    stroke-linecap: round;
    stroke-dasharray: 283;
    stroke-dashoffset: 283;
    transition: stroke-dashoffset 0.3s;
}

.progress-text {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-blue);
}

/* Tools Grid */
.tools-section {
    padding: 6rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.tools-section h2 {
    text-align: center;
    font-size: 2.5rem;
    margin-bottom: 3rem;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
}

.tool-card {
    background: var(--glass);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 2rem;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-blue), var(--accent-purple));
    transform: scaleX(0);
    transition: transform 0.3s;
}

.tool-card:hover::before {
    transform: scaleX(1);
}

.tool-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-blue);
    box-shadow: var(--shadow-glow);
}

.tool-card.featured {
    border-color: var(--accent-purple);
    background: linear-gradient(135deg, var(--glass), rgba(139, 92, 246, 0.1));
}

.tool-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.tool-card h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.tool-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1rem;
}

.tool-tags {
    display: flex;
    gap: 0.5rem;
    flex-wrap: wrap;
}

.tool-tags span {
    font-size: 0.75rem;
    padding: 0.25rem 0.75rem;
    background: var(--glass-border);
    border-radius: 50px;
    color: var(--text-secondary);
}

/* Features Section */
.features-section {
    padding: 4rem 2rem;
    max-width: 1200px;
    margin: 0 auto;
}

.feature-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    margin-bottom: 6rem;
}

.feature-row.reverse {
    direction: rtl;
}

.feature-row.reverse > * {
    direction: ltr;
}

.feature-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.feature-content p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
}

.feature-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.feature-list li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
}

.feature-visual {
    height: 300px;
    background: var(--glass);
    border-radius: 24px;
    border: 1px solid var(--glass-border);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
}

.security-badge {
    font-size: 4rem;
    filter: drop-shadow(0 0 30px rgba(34, 197, 94, 0.5));
    animation: pulse 2s infinite;
}

.speed-meter {
    font-size: 2rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    animation: glow 2s infinite alternate;
}

@keyframes glow {
    from { filter: drop-shadow(0 0 10px rgba(59, 130, 246, 0.5)); }
    to { filter: drop-shadow(0 0 30px rgba(139, 92, 246, 0.8)); }
}

/* Footer */
footer {
    border-top: 1px solid var(--glass-border);
    padding: 4rem 2rem 2rem;
    margin-top: 4rem;
}

.footer-content {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: start;
    flex-wrap: wrap;
    gap: 2rem;
    margin-bottom: 3rem;
}

.footer-brand h3 {
    font-size: 1.5rem;
    margin-bottom: 0.5rem;
}

.footer-brand p {
    color: var(--text-secondary);
    max-width: 300px;
}

.footer-links {
    display: flex;
    gap: 2rem;
}

.footer-links a {
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.3s;
}

.footer-links a:hover {
    color: var(--accent-blue);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid var(--glass-border);
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* ============================
   MODAL STYLES
   ============================ */

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(2, 6, 23, 0.95);
    backdrop-filter: blur(10px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    padding: 1rem;
}

.modal-content {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: 24px;
    padding: 1.5rem;
    max-width: 500px;
    width: 100%;
    max-height: 90vh;
    overflow-y: auto;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.5rem;
}

.modal-header h3 {
    font-size: 1.25rem;
}

.close-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 8px;
    transition: all 0.3s;
}

.close-btn:hover {
    background: var(--glass);
    color: var(--text-primary);
}

.tool-upload {
    border: 2px dashed var(--glass-border);
    border-radius: 12px;
    padding: 2rem;
    text-align: center;
    cursor: pointer;
    transition: all 0.3s;
    margin-bottom: 1rem;
}

.tool-upload:hover {
    border-color: var(--accent-blue);
    background: rgba(59, 130, 246, 0.05);
}

.tool-file-list {
    max-height: 200px;
    overflow-y: auto;
    margin-bottom: 1rem;
}

.tool-file-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    background: var(--glass);
    border-radius: 8px;
    margin-bottom: 0.5rem;
}

.tool-file-item button {
    background: var(--glass-border);
    border: none;
    color: var(--text-secondary);
    width: 28px;
    height: 28px;
    border-radius: 4px;
    cursor: pointer;
    margin-left: 0.25rem;
    transition: all 0.2s;
}

.tool-file-item button:hover {
    background: var(--accent-blue);
    color: white;
}

.tool-file-item button.delete-btn {
    background: var(--error);
    color: white;
}

.tool-file-item button:disabled {
    opacity: 0.3;
    cursor: not-allowed;
}

.tool-input, .tool-select {
    width: 100%;
    padding: 0.875rem;
    border-radius: 12px;
    border: 1px solid var(--glass-border);
    background: #000000;
    color: #ffffff;
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.tool-input:focus, .tool-select:focus {
    outline: none;
    border-color: var(--accent-blue);
}

/* ============================
   PROTECT PDF STYLES
   ============================ */

.protect-settings {
    animation: slideDown 0.3s ease-out;
}

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

.protect-input-group {
    margin-bottom: 1rem;
}

.protect-input-group label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.protect-input-group .tool-input {
    margin-bottom: 0.25rem;
}

.input-hint-text {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 0.25rem;
}

.protect-options {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--glass-border);
}

.protect-options .checkbox {
    font-size: 0.9rem;
}

/* ============================
   FEEDBACK CHATBOX STYLES
   ============================ */

.feedback-widget {
    position: fixed;
    bottom: 2rem;
    left: 2rem;
    z-index: 10001;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.feedback-toggle {
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--accent-blue), var(--accent-purple));
    border: none;
    color: white;
    font-size: 1.5rem;
    cursor: pointer;
    box-shadow: 0 4px 20px rgba(59, 130, 246, 0.4);
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2;
}

.feedback-toggle:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 30px rgba(139, 92, 246, 0.5);
}

.feedback-panel {
    position: absolute;
    bottom: 70px;
    left: 0;
    width: 340px;
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: 20px;
    padding: 1.5rem;
    backdrop-filter: blur(20px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.5);
    animation: feedbackSlideUp 0.3s ease-out;
    flex-direction: column;
}

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

.feedback-header {
    margin-bottom: 1rem;
    padding-bottom: 1rem;
    border-bottom: 1px solid var(--glass-border);
}

.feedback-header h4 {
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

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

.feedback-form {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

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

.feedback-field label {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-secondary);
}

.feedback-field input,
.feedback-field select,
.feedback-field textarea {
    padding: 0.75rem;
    border-radius: 10px;
    border: 1px solid var(--glass-border);
    background: #000000;
    color: #ffffff;
    font-size: 0.9rem;
    font-family: inherit;
    transition: var(--transition);
}

.feedback-field select option {
    background: #000000;
    color: #ffffff;
}

.feedback-field input:focus,
.feedback-field select:focus,
.feedback-field textarea:focus {
    outline: none;
    border-color: var(--accent-blue);
}

.feedback-field textarea {
    resize: vertical;
    min-height: 80px;
}

.feedback-submit {
    width: 100%;
    margin-top: 0.5rem;
}

.feedback-footer {
    margin-top: 1rem;
    padding-top: 1rem;
    border-top: 1px solid var(--glass-border);
    text-align: center;
}

.feedback-email-link {
    color: var(--text-secondary);
    font-size: 0.85rem;
    text-decoration: none;
    transition: color 0.3s;
}

.feedback-email-link:hover {
    color: var(--accent-blue);
}

/* ============================
   TOAST NOTIFICATIONS
   ============================ */

.toast-container {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    z-index: 10000;
}

.toast {
    background: var(--bg-card);
    border: 1px solid var(--glass-border);
    border-radius: 12px;
    padding: 1rem 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.75rem;
    animation: toastIn 0.3s ease-out;
    backdrop-filter: blur(10px);
    max-width: 400px;
}

.toast.success {
    border-left: 4px solid var(--success);
}

.toast.error {
    border-left: 4px solid var(--error);
}

.toast.warning {
    border-left: 4px solid var(--warning);
}

.toast.info {
    border-left: 4px solid var(--accent-blue);
}

@keyframes toastIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

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

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

::-webkit-scrollbar-track {
    background: var(--bg-primary);
}

::-webkit-scrollbar-thumb {
    background: var(--glass-border);
    border-radius: 4px;
}

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

/* Responsive */
@media (max-width: 968px) {
    .hero {
        flex-direction: column;
        text-align: center;
        padding: 6rem 2rem;
    }
    
    .hero-content {
        max-width: 100%;
    }
    
    .hero-stats {
        justify-content: center;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .hero-visual {
        display: none;
    }
    
    .feature-row {
        grid-template-columns: 1fr;
    }
    
    .conversion-settings {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .navbar {
        padding: 0.75rem 1rem;
        flex-wrap: wrap;
    }
    
    .logo-section h1 {
        font-size: 1.1rem;
    }
    
    nav {
        display: flex;
        width: 100%;
        order: 3;
        gap: 1rem;
        padding: 0.75rem 0 0;
        border-top: 1px solid var(--glass-border);
        margin-top: 0.5rem;
        justify-content: center;
    }
    
    nav a {
        font-size: 0.85rem;
    }
    
    .hero h2 {
        font-size: 2.5rem;
    }
    
    .tools-grid {
        grid-template-columns: 1fr;
    }
    
    .action-bar {
        flex-direction: column;
    }
    
    .convert-btn {
        width: 100%;
    }

    /* Feedback widget mobile */
    .feedback-widget {
        bottom: 1rem;
        left: 1rem;
    }

    .feedback-panel {
        width: calc(100vw - 2rem);
        max-width: 340px;
    }

    .feedback-toggle {
        width: 48px;
        height: 48px;
        font-size: 1.25rem;
    }

    /* Footer mobile */
    .footer-content {
        flex-direction: column;
        text-align: center;
    }

    .footer-links {
        justify-content: center;
        flex-wrap: wrap;
    }
}