/**
 * PDF ToolKit - Modern Frontend Styles
 * Improved UI with sleek design
 */

/* ===== CSS Variables ===== */
:root {
    --pdftk-primary: #E74C3C;
    --pdftk-primary-dark: #C0392B;
    --pdftk-primary-light: #FADBD8;
    --pdftk-secondary: #2C3E50;
    --pdftk-accent: #3498DB;
    --pdftk-success: #27AE60;
    --pdftk-warning: #F39C12;
    --pdftk-danger: #E74C3C;
    --pdftk-gray-100: #F8F9FA;
    --pdftk-gray-200: #E9ECEF;
    --pdftk-gray-300: #DEE2E6;
    --pdftk-gray-400: #CED4DA;
    --pdftk-gray-500: #ADB5BD;
    --pdftk-gray-600: #6C757D;
    --pdftk-gray-700: #495057;
    --pdftk-gray-800: #343A40;
    --pdftk-gray-900: #212529;
    --pdftk-white: #FFFFFF;
    --pdftk-shadow-sm: 0 1px 2px rgba(0,0,0,0.05);
    --pdftk-shadow: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --pdftk-shadow-md: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --pdftk-shadow-lg: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
    --pdftk-shadow-xl: 0 25px 50px -12px rgba(0,0,0,0.25);
    --pdftk-radius: 12px;
    --pdftk-radius-lg: 16px;
    --pdftk-radius-xl: 24px;
    --pdftk-transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --pdftk-font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
}

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

.pdftk-container {
    font-family: var(--pdftk-font);
    color: var(--pdftk-gray-800);
    line-height: 1.6;
    background: var(--pdftk-gray-100);
    min-height: 100vh;
}

.pdftk-container a {
    text-decoration: none;
    color: inherit;
}

/* ===== Header / Navigation ===== */
.pdftk-header {
    background: var(--pdftk-white);
    border-bottom: 1px solid var(--pdftk-gray-200);
    position: sticky;
    top: 0;
    z-index: 1000;
    backdrop-filter: blur(10px);
    background: rgba(255,255,255,0.95);
}

.pdftk-nav {
    max-width: 1280px;
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.pdftk-logo {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 800;
    font-size: 24px;
    color: var(--pdftk-secondary);
    letter-spacing: -0.5px;
}

.pdftk-logo-icon {
    width: 40px;
    height: 40px;
    background: linear-gradient(135deg, var(--pdftk-primary) 0%, var(--pdftk-primary-dark) 100%);
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 18px;
    box-shadow: 0 4px 12px rgba(231, 76, 60, 0.3);
}

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

.pdftk-nav-links {
    display: flex;
    align-items: center;
    gap: 8px;
    list-style: none;
}

.pdftk-nav-links a {
    padding: 10px 16px;
    border-radius: 8px;
    font-weight: 500;
    font-size: 14px;
    color: var(--pdftk-gray-600);
    transition: var(--pdftk-transition);
    display: flex;
    align-items: center;
    gap: 6px;
}

.pdftk-nav-links a:hover {
    color: var(--pdftk-primary);
    background: var(--pdftk-primary-light);
}

.pdftk-nav-links .pdftk-btn-primary {
    background: var(--pdftk-primary);
    color: white;
    padding: 10px 20px;
}

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

.pdftk-dropdown {
    position: relative;
}

.pdftk-dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    background: var(--pdftk-white);
    border-radius: var(--pdftk-radius);
    box-shadow: var(--pdftk-shadow-lg);
    padding: 8px;
    min-width: 220px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-10px);
    transition: var(--pdftk-transition);
    list-style: none;
    border: 1px solid var(--pdftk-gray-200);
}

.pdftk-dropdown:hover .pdftk-dropdown-menu {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.pdftk-dropdown-menu a {
    display: block;
    padding: 8px 12px;
    border-radius: 6px;
    font-size: 13px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.pdftk-dropdown-menu a:hover {
    background: var(--pdftk-gray-100);
}

/* ===== Hero Section ===== */
.pdftk-hero {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 50%, #f093fb 100%);
    padding: 100px 24px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.pdftk-hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%23ffffff' fill-opacity='0.08'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
    opacity: 0.5;
}

.pdftk-hero-content {
    position: relative;
    z-index: 1;
    max-width: 800px;
    margin: 0 auto;
}

.pdftk-hero h1 {
    font-size: 56px;
    font-weight: 800;
    color: white;
    margin-bottom: 20px;
    line-height: 1.1;
    letter-spacing: -2px;
    text-shadow: 0 2px 20px rgba(0,0,0,0.15);
}

.pdftk-hero h1 .highlight {
    background: linear-gradient(to right, #FFD700, #FFA500);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.pdftk-hero p {
    font-size: 20px;
    color: rgba(255,255,255,0.9);
    margin-bottom: 40px;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
    line-height: 1.6;
}

.pdftk-hero-stats {
    display: flex;
    justify-content: center;
    gap: 48px;
    margin-top: 48px;
}

.pdftk-hero-stat {
    text-align: center;
}

.pdftk-hero-stat .number {
    font-size: 36px;
    font-weight: 800;
    color: white;
    display: block;
}

.pdftk-hero-stat .label {
    font-size: 14px;
    color: rgba(255,255,255,0.8);
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ===== Search Bar ===== */
.pdftk-search {
    max-width: 600px;
    margin: 0 auto 60px;
    position: relative;
}

.pdftk-search input {
    width: 100%;
    padding: 16px 24px 16px 56px;
    border: 2px solid var(--pdftk-gray-200);
    border-radius: 50px;
    font-size: 16px;
    background: var(--pdftk-white);
    transition: var(--pdftk-transition);
    box-shadow: var(--pdftk-shadow);
}

.pdftk-search input:focus {
    outline: none;
    border-color: var(--pdftk-primary);
    box-shadow: 0 0 0 4px rgba(231, 76, 60, 0.1), var(--pdftk-shadow);
}

.pdftk-search-icon {
    position: absolute;
    left: 22px;
    top: 50%;
    transform: translateY(-50%);
    color: var(--pdftk-gray-400);
    font-size: 18px;
}

/* ===== Section Headers ===== */
.pdftk-section {
    max-width: 1280px;
    margin: 0 auto;
    padding: 60px 24px;
}

.pdftk-section-header {
    text-align: center;
    margin-bottom: 48px;
}

.pdftk-section-header h2 {
    font-size: 36px;
    font-weight: 800;
    color: var(--pdftk-secondary);
    margin-bottom: 12px;
}

.pdftk-section-header h2 .highlight {
    color: var(--pdftk-primary);
}

.pdftk-section-header p {
    font-size: 17px;
    color: var(--pdftk-gray-600);
    max-width: 500px;
    margin: 0 auto;
}

/* ===== Tool Cards Grid ===== */
.pdftk-tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 24px;
}

.pdftk-tool-card {
    background: var(--pdftk-white);
    border-radius: var(--pdftk-radius-lg);
    padding: 28px;
    box-shadow: var(--pdftk-shadow-sm);
    border: 1px solid var(--pdftk-gray-200);
    transition: var(--pdftk-transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.pdftk-tool-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--card-color, var(--pdftk-primary)), var(--card-color-light, var(--pdftk-primary-light)));
    opacity: 0;
    transition: var(--pdftk-transition);
}

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

.pdftk-tool-card:hover::before {
    opacity: 1;
}

.pdftk-tool-card-icon {
    width: 56px;
    height: 56px;
    border-radius: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 24px;
    margin-bottom: 20px;
    position: relative;
}

.pdftk-tool-card-icon::after {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: 14px;
    opacity: 0.15;
    background: var(--card-color, var(--pdftk-primary));
}

.pdftk-tool-card-icon i {
    position: relative;
    z-index: 1;
    color: var(--card-color, var(--pdftk-primary));
}

.pdftk-tool-card h3 {
    font-size: 18px;
    font-weight: 700;
    color: var(--pdftk-gray-900);
    margin-bottom: 10px;
}

.pdftk-tool-card p {
    font-size: 14px;
    color: var(--pdftk-gray-600);
    line-height: 1.6;
    margin-bottom: 20px;
    display: -webkit-box;
    -webkit-line-clamp: 2;
    -webkit-box-orient: vertical;
    overflow: hidden;
}

.pdftk-tool-card-arrow {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 13px;
    font-weight: 600;
    color: var(--pdftk-primary);
    opacity: 0;
    transform: translateX(-10px);
    transition: var(--pdftk-transition);
}

.pdftk-tool-card:hover .pdftk-tool-card-arrow {
    opacity: 1;
    transform: translateX(0);
}

/* ===== Tool Page ===== */
.pdftk-tool-page {
    max-width: 900px;
    margin: 40px auto;
    padding: 0 24px;
}

.pdftk-tool-header {
    background: linear-gradient(135deg, var(--pdftk-primary) 0%, var(--pdftk-primary-dark) 100%);
    border-radius: var(--pdftk-radius-xl);
    padding: 48px;
    text-align: center;
    color: white;
    margin-bottom: 32px;
    box-shadow: var(--pdftk-shadow-lg);
    position: relative;
    overflow: hidden;
}

.pdftk-tool-header::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(255,255,255,0.1) 1px, transparent 1px);
    background-size: 20px 20px;
    opacity: 0.3;
}

.pdftk-tool-header h1 {
    font-size: 32px;
    font-weight: 800;
    margin-bottom: 12px;
    position: relative;
}

.pdftk-tool-header p {
    font-size: 16px;
    opacity: 0.9;
    position: relative;
}

/* ===== Upload Zone ===== */
.pdftk-upload-zone {
    background: var(--pdftk-white);
    border: 3px dashed var(--pdftk-gray-300);
    border-radius: var(--pdftk-radius-xl);
    padding: 60px 40px;
    text-align: center;
    transition: var(--pdftk-transition);
    cursor: pointer;
    position: relative;
    overflow: hidden;
}

.pdftk-upload-zone:hover {
    border-color: var(--pdftk-primary);
    background: var(--pdftk-primary-light);
}

.pdftk-upload-zone.dragover {
    border-color: var(--pdftk-primary);
    background: var(--pdftk-primary-light);
    transform: scale(1.01);
}

.pdftk-upload-zone.uploading {
    border-color: var(--pdftk-accent);
    background: rgba(52, 152, 219, 0.05);
}

.pdftk-upload-zone.success {
    border-color: var(--pdftk-success);
    background: rgba(39, 174, 96, 0.05);
}

.pdftk-upload-zone.error {
    border-color: var(--pdftk-danger);
    background: rgba(231, 76, 60, 0.05);
}

.pdftk-upload-icon {
    font-size: 64px;
    color: var(--pdftk-primary);
    margin-bottom: 20px;
    display: inline-block;
}

.pdftk-upload-zone h3 {
    font-size: 22px;
    font-weight: 700;
    color: var(--pdftk-gray-800);
    margin-bottom: 10px;
}

.pdftk-upload-zone p {
    font-size: 15px;
    color: var(--pdftk-gray-600);
    margin-bottom: 24px;
}

.pdftk-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 15px;
    font-weight: 600;
    border: none;
    cursor: pointer;
    transition: var(--pdftk-transition);
    font-family: inherit;
}

.pdftk-btn-primary {
    background: linear-gradient(135deg, var(--pdftk-primary) 0%, var(--pdftk-primary-dark) 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(231, 76, 60, 0.35);
}

.pdftk-btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(231, 76, 60, 0.45);
}

.pdftk-btn-secondary {
    background: var(--pdftk-gray-100);
    color: var(--pdftk-gray-700);
    border: 1px solid var(--pdftk-gray-300);
}

.pdftk-btn-secondary:hover {
    background: var(--pdftk-gray-200);
}

.pdftk-btn-success {
    background: linear-gradient(135deg, var(--pdftk-success) 0%, #1E8449 100%);
    color: white;
    box-shadow: 0 4px 15px rgba(39, 174, 96, 0.35);
}

.pdftk-file-input {
    display: none;
}

/* ===== File List ===== */
.pdftk-file-list {
    margin-top: 24px;
    text-align: left;
}

.pdftk-file-item {
    display: flex;
    align-items: center;
    gap: 16px;
    padding: 16px 20px;
    background: var(--pdftk-gray-100);
    border-radius: var(--pdftk-radius);
    margin-bottom: 8px;
    transition: var(--pdftk-transition);
}

.pdftk-file-item:hover {
    background: var(--pdftk-gray-200);
}

.pdftk-file-icon {
    width: 44px;
    height: 44px;
    border-radius: 10px;
    background: var(--pdftk-primary-light);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--pdftk-primary);
    font-size: 18px;
    flex-shrink: 0;
}

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

.pdftk-file-name {
    font-weight: 600;
    font-size: 14px;
    color: var(--pdftk-gray-800);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.pdftk-file-size {
    font-size: 12px;
    color: var(--pdftk-gray-500);
}

.pdftk-file-remove {
    width: 32px;
    height: 32px;
    border-radius: 8px;
    border: none;
    background: transparent;
    color: var(--pdftk-gray-400);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: var(--pdftk-transition);
}

.pdftk-file-remove:hover {
    background: var(--pdftk-danger);
    color: white;
}

/* ===== Progress Bar ===== */
.pdftk-progress {
    width: 100%;
    height: 8px;
    background: var(--pdftk-gray-200);
    border-radius: 4px;
    overflow: hidden;
    margin: 20px 0;
}

.pdftk-progress-bar {
    height: 100%;
    background: linear-gradient(90deg, var(--pdftk-primary), var(--pdftk-accent));
    border-radius: 4px;
    transition: width 0.3s ease;
    position: relative;
}

.pdftk-progress-bar::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.3), transparent);
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% { transform: translateX(-100%); }
    100% { transform: translateX(100%); }
}

.pdftk-progress-text {
    font-size: 14px;
    color: var(--pdftk-gray-600);
    text-align: center;
    margin-top: 8px;
}

/* ===== Options Panel ===== */
.pdftk-options {
    background: var(--pdftk-white);
    border-radius: var(--pdftk-radius-lg);
    padding: 28px;
    margin-top: 24px;
    border: 1px solid var(--pdftk-gray-200);
}

.pdftk-options h4 {
    font-size: 16px;
    font-weight: 700;
    color: var(--pdftk-gray-800);
    margin-bottom: 20px;
    padding-bottom: 12px;
    border-bottom: 2px solid var(--pdftk-gray-100);
}

.pdftk-option-group {
    margin-bottom: 20px;
}

.pdftk-option-group label {
    display: block;
    font-size: 14px;
    font-weight: 600;
    color: var(--pdftk-gray-700);
    margin-bottom: 8px;
}

.pdftk-option-group input,
.pdftk-option-group select,
.pdftk-option-group textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--pdftk-gray-200);
    border-radius: 10px;
    font-size: 14px;
    font-family: inherit;
    transition: var(--pdftk-transition);
    background: var(--pdftk-white);
}

.pdftk-option-group input:focus,
.pdftk-option-group select:focus,
.pdftk-option-group textarea:focus {
    outline: none;
    border-color: var(--pdftk-primary);
    box-shadow: 0 0 0 3px rgba(231, 76, 60, 0.1);
}

.pdftk-option-group textarea {
    min-height: 120px;
    resize: vertical;
}

/* ===== Result Section ===== */
.pdftk-result {
    background: var(--pdftk-white);
    border-radius: var(--pdftk-radius-lg);
    padding: 40px;
    margin-top: 24px;
    text-align: center;
    border: 1px solid var(--pdftk-gray-200);
}

.pdftk-result-icon {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--pdftk-success), #1E8449);
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 36px;
    color: white;
    box-shadow: 0 8px 25px rgba(39, 174, 96, 0.35);
}

.pdftk-result h3 {
    font-size: 24px;
    font-weight: 700;
    color: var(--pdftk-gray-800);
    margin-bottom: 8px;
}

.pdftk-result p {
    color: var(--pdftk-gray-600);
    margin-bottom: 24px;
}

.pdftk-result-stats {
    display: flex;
    justify-content: center;
    gap: 32px;
    margin: 24px 0;
    padding: 20px;
    background: var(--pdftk-gray-100);
    border-radius: var(--pdftk-radius);
}

.pdftk-result-stat {
    text-align: center;
}

.pdftk-result-stat .value {
    font-size: 20px;
    font-weight: 700;
    color: var(--pdftk-primary);
}

.pdftk-result-stat .label {
    font-size: 12px;
    color: var(--pdftk-gray-500);
    text-transform: uppercase;
}

/* ===== Why Choose Us Section ===== */
.pdftk-why {
    background: var(--pdftk-white);
    border-radius: var(--pdftk-radius-xl);
    padding: 60px;
    margin: 40px auto;
    max-width: 1280px;
    box-shadow: var(--pdftk-shadow);
}

.pdftk-features {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 40px;
    margin-top: 40px;
}

.pdftk-feature {
    text-align: center;
}

.pdftk-feature-icon {
    width: 72px;
    height: 72px;
    border-radius: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 20px;
    font-size: 32px;
}

.pdftk-feature h4 {
    font-size: 18px;
    font-weight: 700;
    color: var(--pdftk-gray-800);
    margin-bottom: 10px;
}

.pdftk-feature p {
    font-size: 14px;
    color: var(--pdftk-gray-600);
    line-height: 1.6;
}

/* ===== FAQ Section ===== */
.pdftk-faq {
    max-width: 800px;
    margin: 60px auto;
    padding: 0 24px;
}

.pdftk-faq-item {
    background: var(--pdftk-white);
    border-radius: var(--pdftk-radius);
    margin-bottom: 12px;
    border: 1px solid var(--pdftk-gray-200);
    overflow: hidden;
    transition: var(--pdftk-transition);
}

.pdftk-faq-item:hover {
    box-shadow: var(--pdftk-shadow);
}

.pdftk-faq-question {
    padding: 20px 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    cursor: pointer;
    font-weight: 600;
    font-size: 15px;
    color: var(--pdftk-gray-800);
    transition: var(--pdftk-transition);
}

.pdftk-faq-question:hover {
    color: var(--pdftk-primary);
}

.pdftk-faq-question i {
    transition: var(--pdftk-transition);
    color: var(--pdftk-gray-400);
}

.pdftk-faq-item.active .pdftk-faq-question i {
    transform: rotate(180deg);
    color: var(--pdftk-primary);
}

.pdftk-faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
    padding: 0 24px;
}

.pdftk-faq-item.active .pdftk-faq-answer {
    max-height: 500px;
    padding: 0 24px 20px;
}

.pdftk-faq-answer p {
    font-size: 14px;
    color: var(--pdftk-gray-600);
    line-height: 1.7;
}

/* ===== Stats Section ===== */
.pdftk-stats {
    background: linear-gradient(135deg, var(--pdftk-secondary) 0%, #1a252f 100%);
    padding: 80px 24px;
    text-align: center;
}

.pdftk-stats-grid {
    display: flex;
    justify-content: center;
    gap: 64px;
    max-width: 900px;
    margin: 0 auto;
}

.pdftk-stat {
    text-align: center;
}

.pdftk-stat-number {
    font-size: 48px;
    font-weight: 800;
    color: white;
    display: block;
    line-height: 1;
}

.pdftk-stat-label {
    font-size: 14px;
    color: rgba(255,255,255,0.7);
    margin-top: 8px;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* ===== CTA Section ===== */
.pdftk-cta {
    background: linear-gradient(135deg, var(--pdftk-primary) 0%, var(--pdftk-primary-dark) 100%);
    padding: 80px 24px;
    text-align: center;
    position: relative;
    overflow: hidden;
}

.pdftk-cta::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(255,255,255,0.1) 0%, transparent 50%);
}

.pdftk-cta h2 {
    font-size: 40px;
    font-weight: 800;
    color: white;
    margin-bottom: 16px;
    position: relative;
}

.pdftk-cta p {
    font-size: 18px;
    color: rgba(255,255,255,0.9);
    margin-bottom: 32px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
    position: relative;
}

.pdftk-cta-badges {
    display: flex;
    justify-content: center;
    gap: 24px;
    margin-top: 32px;
    flex-wrap: wrap;
    position: relative;
}

.pdftk-cta-badge {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: rgba(255,255,255,0.15);
    border-radius: 50px;
    color: white;
    font-size: 13px;
    font-weight: 500;
    backdrop-filter: blur(10px);
}

/* ===== Footer ===== */
.pdftk-footer {
    background: var(--pdftk-secondary);
    color: rgba(255,255,255,0.7);
    padding: 60px 24px 30px;
}

.pdftk-footer-grid {
    max-width: 1280px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 2fr 1fr 1fr 1fr;
    gap: 48px;
}

.pdftk-footer-brand h3 {
    color: white;
    font-size: 24px;
    font-weight: 800;
    margin-bottom: 16px;
    display: flex;
    align-items: center;
    gap: 10px;
}

.pdftk-footer-brand p {
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 20px;
}

.pdftk-footer-badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: rgba(255,255,255,0.1);
    border-radius: 50px;
    font-size: 12px;
    color: rgba(255,255,255,0.9);
}

.pdftk-footer-column h4 {
    color: white;
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 20px;
    padding-bottom: 10px;
    border-bottom: 2px solid var(--pdftk-primary);
    display: inline-block;
}

.pdftk-footer-links {
    list-style: none;
}

.pdftk-footer-links li {
    margin-bottom: 10px;
}

.pdftk-footer-links a {
    font-size: 14px;
    color: rgba(255,255,255,0.7);
    transition: var(--pdftk-transition);
    display: block;
}

.pdftk-footer-links a:hover {
    color: white;
    padding-left: 4px;
}

.pdftk-footer-bottom {
    max-width: 1280px;
    margin: 40px auto 0;
    padding-top: 24px;
    border-top: 1px solid rgba(255,255,255,0.1);
    text-align: center;
    font-size: 13px;
    color: rgba(255,255,255,0.5);
}

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .pdftk-footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    
    .pdftk-nav-links {
        display: none;
    }
}

@media (max-width: 768px) {
    .pdftk-hero h1 {
        font-size: 36px;
    }
    
    .pdftk-hero p {
        font-size: 16px;
    }
    
    .pdftk-tools-grid {
        grid-template-columns: 1fr;
    }
    
    .pdftk-footer-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }
    
    .pdftk-stats-grid {
        flex-direction: column;
        gap: 32px;
    }
    
    .pdftk-why {
        padding: 40px 24px;
    }
    
    .pdftk-tool-header {
        padding: 32px 24px;
    }
    
    .pdftk-tool-header h1 {
        font-size: 24px;
    }
    
    .pdftk-result-stats {
        flex-direction: column;
        gap: 16px;
    }
}

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

.pdftk-tool-card {
    animation: fadeInUp 0.5s ease forwards;
}

.pdftk-tool-card:nth-child(1) { animation-delay: 0.05s; }
.pdftk-tool-card:nth-child(2) { animation-delay: 0.1s; }
.pdftk-tool-card:nth-child(3) { animation-delay: 0.15s; }
.pdftk-tool-card:nth-child(4) { animation-delay: 0.2s; }
.pdftk-tool-card:nth-child(5) { animation-delay: 0.25s; }
.pdftk-tool-card:nth-child(6) { animation-delay: 0.3s; }

/* ===== Loading Spinner ===== */
.pdftk-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--pdftk-gray-200);
    border-top-color: var(--pdftk-primary);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
    margin: 20px auto;
}

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

/* ===== Alert Messages ===== */
.pdftk-alert {
    padding: 16px 20px;
    border-radius: var(--pdftk-radius);
    margin-bottom: 20px;
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 14px;
}

.pdftk-alert-success {
    background: rgba(39, 174, 96, 0.1);
    color: var(--pdftk-success);
    border: 1px solid rgba(39, 174, 96, 0.2);
}

.pdftk-alert-error {
    background: rgba(231, 76, 60, 0.1);
    color: var(--pdftk-danger);
    border: 1px solid rgba(231, 76, 60, 0.2);
}

.pdftk-alert-warning {
    background: rgba(243, 156, 18, 0.1);
    color: var(--pdftk-warning);
    border: 1px solid rgba(243, 156, 18, 0.2);
}

/* ===== Back to Top ===== */
.pdftk-back-to-top {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--pdftk-primary);
    color: white;
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 18px;
    box-shadow: 0 4px 15px rgba(231, 76, 60, 0.4);
    opacity: 0;
    visibility: hidden;
    transition: var(--pdftk-transition);
    z-index: 999;
}

.pdftk-back-to-top.visible {
    opacity: 1;
    visibility: visible;
}

.pdftk-back-to-top:hover {
    transform: translateY(-4px);
    box-shadow: 0 8px 25px rgba(231, 76, 60, 0.5);
}

/* ===== Tooltip ===== */
.pdftk-tooltip {
    position: relative;
}

.pdftk-tooltip::after {
    content: attr(data-tooltip);
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%) translateY(-8px);
    padding: 6px 12px;
    background: var(--pdftk-gray-800);
    color: white;
    font-size: 12px;
    border-radius: 6px;
    white-space: nowrap;
    opacity: 0;
    visibility: hidden;
    transition: var(--pdftk-transition);
}

.pdftk-tooltip:hover::after {
    opacity: 1;
    visibility: visible;
}