:root {
    --bg-dark: #09090e;
    --card-bg: rgba(20, 20, 30, 0.45);
    --card-border: rgba(255, 255, 255, 0.08);
    --primary: #8a2be2;
    --primary-glow: rgba(138, 43, 226, 0.4);
    --secondary: #10b981;
    --secondary-glow: rgba(16, 185, 129, 0.4);
    --text-primary: #f3f4f6;
    --text-secondary: #9ca3af;
    --accent: #2563eb;
    --accent-glow: rgba(37, 99, 235, 0.3);
    --danger: #ef4444;
    --danger-glow: rgba(239, 68, 68, 0.3);
    
    --radius-lg: 16px;
    --radius-md: 12px;
    --radius-sm: 8px;
    
    --font-sans: 'Outfit', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    background-color: var(--bg-dark);
    color: var(--text-primary);
    font-family: var(--font-sans);
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
    position: relative;
}

/* Background Glow Effects */
.bg-glow {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    width: 100%;
    height: 100%;
    overflow: hidden;
    z-index: -1;
    pointer-events: none;
}

.glow-1 {
    position: absolute;
    top: -10%;
    left: -10%;
    width: 50%;
    height: 60%;
    background: radial-gradient(circle, rgba(138, 43, 226, 0.12) 0%, rgba(0,0,0,0) 70%);
    filter: blur(80px);
    animation: pulse 12s infinite alternate;
}

.glow-2 {
    position: absolute;
    bottom: -10%;
    right: -10%;
    width: 50%;
    height: 60%;
    background: radial-gradient(circle, rgba(37, 99, 235, 0.12) 0%, rgba(0,0,0,0) 70%);
    filter: blur(80px);
    animation: pulse 12s infinite alternate-reverse;
}

@keyframes pulse {
    0% { transform: scale(1) translate(0, 0); opacity: 0.8; }
    100% { transform: scale(1.2) translate(5%, 5%); opacity: 1; }
}

/* Header & Navigation */
.app-header {
    background: rgba(9, 9, 14, 0.8);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--card-border);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 16px 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    user-select: none;
}

.logo-icon {
    color: var(--primary);
    filter: drop-shadow(0 0 8px var(--primary-glow));
}

.logo h1 {
    font-size: 1.6rem;
    font-weight: 700;
    letter-spacing: -0.5px;
    background: linear-gradient(135deg, #fff 40%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.logo h1 span {
    color: var(--primary);
    -webkit-text-fill-color: var(--primary);
    text-shadow: 0 0 15px var(--primary-glow);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 24px;
}

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

.nav-links a:hover, .nav-links a.active {
    color: var(--text-primary);
    text-shadow: 0 0 10px rgba(255, 255, 255, 0.3);
}

.badge-free {
    background: rgba(16, 185, 129, 0.1);
    color: var(--secondary);
    border: 1px solid rgba(16, 185, 129, 0.2);
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    box-shadow: 0 0 10px rgba(16, 185, 129, 0.15);
}

/* Main Content Wrapper */
.main-content {
    flex: 1;
    max-width: 1200px;
    width: 100%;
    margin: 0 auto;
    padding: 40px 24px;
    display: flex;
    flex-direction: column;
}

.view-section {
    width: 100%;
    transition: var(--transition);
    animation: fadeIn 0.4s ease-out;
}

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

.hidden {
    display: none !important;
}

/* Hero Section */
.hero-section {
    text-align: center;
    margin-bottom: 48px;
}

.hero-section h2 {
    font-size: 2.2rem;
    font-weight: 700;
    margin-bottom: 12px;
    background: linear-gradient(135deg, #fff 50%, var(--primary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-section p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    font-weight: 300;
    max-width: 600px;
    margin: 0 auto;
}

/* Tools Grid */
.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 24px;
}

.tool-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-radius: var(--radius-lg);
    padding: 30px 24px;
    display: flex;
    flex-direction: column;
    gap: 16px;
    position: relative;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.15);
    transition: var(--transition);
}

.tool-card.active-tool {
    cursor: pointer;
}

.tool-card.active-tool:hover {
    transform: translateY(-5px);
    border-color: var(--primary);
    box-shadow: 0 15px 35px rgba(138, 43, 226, 0.2), 
                inset 0 1px 0 rgba(255, 255, 255, 0.1);
}

.tool-card.disabled {
    opacity: 0.6;
    user-select: none;
}

.tool-icon {
    width: 60px;
    height: 60px;
    border-radius: var(--radius-md);
    display: flex;
    justify-content: center;
    align-items: center;
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.tool-icon.word {
    background: rgba(37, 99, 235, 0.1);
    color: var(--accent);
    border-color: rgba(37, 99, 235, 0.2);
}

.tool-icon.merge {
    background: rgba(16, 185, 129, 0.1);
    color: var(--secondary);
    border-color: rgba(16, 185, 129, 0.2);
}

.tool-icon.split {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border-color: rgba(239, 68, 68, 0.2);
}

.tool-icon.compress {
    background: rgba(245, 158, 11L, 0.1);
    color: #f59e0b;
    border-color: rgba(245, 158, 11, 0.2);
}

.tool-card h3 {
    font-size: 1.25rem;
    font-weight: 600;
}

.tool-card p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.5;
    flex-grow: 1;
}

.action-tag {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary);
    display: inline-flex;
    align-items: center;
    gap: 4px;
    transition: var(--transition);
}

.tool-card:hover .action-tag {
    text-shadow: 0 0 10px var(--primary-glow);
    color: #9d4edd;
}

.coming-soon {
    position: absolute;
    top: 20px;
    right: 20px;
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--text-secondary);
}

/* Back Button */
.btn-back {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 500;
    display: flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 24px;
    align-self: flex-start;
    transition: var(--transition);
}

.btn-back:hover {
    color: var(--text-primary);
    transform: translateX(-3px);
}

/* Tool Workspace Container */
.tool-container {
    width: 100%;
    max-width: 680px;
    margin: 0 auto;
}

.tool-workspace {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(24px);
    -webkit-backdrop-filter: blur(24px);
    border-radius: var(--radius-lg);
    padding: 40px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.3),
                inset 0 1px 0 rgba(255, 255, 255, 0.05);
}

/* Drop Zone */
.drop-zone {
    border: 2px dashed rgba(255, 255, 255, 0.15);
    border-radius: var(--radius-md);
    padding: 60px 20px;
    text-align: center;
    cursor: pointer;
    background: rgba(255, 255, 255, 0.01);
    transition: var(--transition);
}

.drop-zone:hover, .drop-zone.dragover {
    border-color: var(--primary);
    background: rgba(138, 43, 226, 0.04);
    box-shadow: 0 0 25px var(--primary-glow);
}

.drop-zone-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.icon-wrap {
    width: 80px;
    height: 80px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.03);
    display: flex;
    justify-content: center;
    align-items: center;
    color: var(--text-secondary);
    transition: var(--transition);
    border: 1px solid rgba(255, 255, 255, 0.05);
}

.drop-zone:hover .icon-wrap {
    color: var(--primary);
    background: rgba(138, 43, 226, 0.08);
    transform: translateY(-5px);
    border-color: rgba(138, 43, 226, 0.2);
}

.drop-zone h3 {
    font-size: 1.35rem;
    font-weight: 500;
}

.drop-zone p {
    font-size: 0.9rem;
    color: var(--text-secondary);
    max-width: 320px;
    margin: 0 auto 8px;
    line-height: 1.4;
}

/* Buttons */
.btn {
    font-family: var(--font-sans);
    font-size: 0.95rem;
    font-weight: 500;
    padding: 12px 28px;
    border-radius: var(--radius-sm);
    border: none;
    cursor: pointer;
    transition: var(--transition);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    outline: none;
    text-decoration: none;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary) 0%, #6a0dad 100%);
    color: white;
    box-shadow: 0 4px 14px rgba(138, 43, 226, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(138, 43, 226, 0.5);
    background: linear-gradient(135deg, #9932cc 0%, #7b1fa2 100%);
}

.btn-primary:active {
    transform: translateY(0);
}

.btn-secondary {
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: rgba(255, 255, 255, 0.12);
    border-color: rgba(255, 255, 255, 0.2);
}

.btn-block {
    width: 100%;
}

.btn-glow {
    position: relative;
    overflow: hidden;
}

.btn-glow::after {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: linear-gradient(45deg, transparent 45%, rgba(255, 255, 255, 0.1) 50%, transparent 55%);
    transform: rotate(45deg);
    animation: shine 3s infinite;
}

@keyframes shine {
    0% { transform: translate(-50%, -50%) rotate(45deg); }
    100% { transform: translate(150%, 150%) rotate(45deg); }
}

.btn-text {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    font-family: var(--font-sans);
    font-size: 0.9rem;
    transition: var(--transition);
}

.btn-text:hover {
    color: var(--primary);
    text-decoration: underline;
}

/* File Card */
.file-card {
    background: rgba(0, 0, 0, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    padding: 18px;
    margin-bottom: 24px;
}

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

.file-icon {
    width: 48px;
    height: 48px;
    border-radius: var(--radius-sm);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 0.8rem;
    font-weight: 700;
}

.file-icon.pdf {
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    border: 1px solid rgba(239, 68, 68, 0.2);
    box-shadow: 0 4px 12px var(--danger-glow);
}

.file-icon.docx {
    background: rgba(37, 99, 235, 0.1);
    color: var(--accent);
    border: 1px solid rgba(37, 99, 235, 0.2);
    box-shadow: 0 4px 12px var(--accent-glow);
}

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

.file-name {
    font-size: 1.05rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.file-size {
    font-size: 0.82rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

.btn-remove {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    border-radius: 50%;
    transition: var(--transition);
}

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

/* Options Panel */
.options-container {
    background: rgba(0, 0, 0, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-md);
    padding: 20px;
    margin-bottom: 24px;
}

.options-container h4 {
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: var(--text-primary);
    margin-bottom: 14px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    padding-bottom: 8px;
}

.checkbox-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.checkbox-container {
    display: block;
    position: relative;
    padding-left: 28px;
    cursor: pointer;
    font-size: 0.85rem;
    color: var(--text-secondary);
    user-select: none;
    line-height: 1.4;
    transition: var(--transition);
}

.checkbox-container:hover {
    color: var(--text-primary);
}

.checkbox-container input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.checkmark {
    position: absolute;
    top: 2px;
    left: 0;
    height: 16px;
    width: 16px;
    background-color: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 4px;
    transition: var(--transition);
}

.checkbox-container:hover input ~ .checkmark {
    border-color: var(--primary);
    background-color: rgba(138, 43, 226, 0.05);
}

.checkbox-container input:checked ~ .checkmark {
    background-color: var(--primary);
    border-color: var(--primary);
    box-shadow: 0 0 8px var(--primary-glow);
}

.checkmark:after {
    content: "";
    position: absolute;
    display: none;
}

.checkbox-container input:checked ~ .checkmark:after {
    display: block;
}

.checkbox-container .checkmark:after {
    left: 5px;
    top: 2px;
    width: 4px;
    height: 8px;
    border: solid white;
    border-width: 0 2px 2px 0;
    transform: rotate(45deg);
}

/* Processing State */
.processing-card {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.loader-container {
    position: relative;
    width: 80px;
    height: 80px;
}

.spinner {
    width: 100%;
    height: 100%;
    border: 3.5px solid rgba(138, 43, 226, 0.1);
    border-top: 3.5px solid var(--primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.spinner-inner {
    position: absolute;
    top: 12px;
    left: 12px;
    right: 12px;
    bottom: 12px;
    border: 3.5px solid transparent;
    border-bottom: 3.5px solid var(--accent);
    border-radius: 50%;
    animation: spin-reverse 1.5s linear infinite;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

@keyframes spin-reverse {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(-360deg); }
}

.status-message {
    font-size: 0.9rem;
    color: var(--text-secondary);
    min-height: 20px;
}

.progress-wrapper {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 14px;
}

.progress-bar {
    flex: 1;
    height: 8px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    overflow: hidden;
    border: 1px solid rgba(255, 255, 255, 0.03);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary) 0%, var(--accent) 100%);
    border-radius: 4px;
    width: 0%;
    transition: width 0.3s ease;
    box-shadow: 0 0 10px rgba(138, 43, 226, 0.5);
}

.progress-percent {
    font-size: 0.9rem;
    font-weight: 600;
    min-width: 38px;
    text-align: right;
}

/* Success Card */
.success-card {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 20px;
}

.success-icon-wrap {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: rgba(16, 185, 129, 0.1);
    color: var(--secondary);
    display: flex;
    justify-content: center;
    align-items: center;
    border: 1px solid rgba(16, 185, 129, 0.2);
    box-shadow: 0 0 20px var(--secondary-glow);
    animation: scale-up 0.4s cubic-bezier(0.175, 0.885, 0.32, 1.275);
}

.check-icon {
    filter: drop-shadow(0 0 4px var(--secondary-glow));
}

@keyframes scale-up {
    0% { transform: scale(0.5); opacity: 0; }
    100% { transform: scale(1); opacity: 1; }
}

.download-action-wrap {
    width: 100%;
    padding: 10px 0;
}

.btn-download {
    width: 100%;
    padding: 16px 28px;
    font-size: 1.05rem;
}

/* Error Card */
.error-card {
    text-align: center;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 16px;
}

.error-icon-wrap {
    width: 64px;
    height: 64px;
    border-radius: 50%;
    background: rgba(239, 68, 68, 0.1);
    color: var(--danger);
    display: flex;
    justify-content: center;
    align-items: center;
    border: 1px solid rgba(239, 68, 68, 0.2);
    box-shadow: 0 0 20px var(--danger-glow);
}

.error-message {
    color: #fda4af;
    font-size: 0.95rem;
}

/* MOCK ADS SYSTEM DESIGN */

/* Common ads settings */
.ad-label {
    display: block;
    font-size: 0.68rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    color: rgba(255, 255, 255, 0.25);
    margin-bottom: 6px;
}

/* Small Horizontal Option Ad (Bottom layout) */
.ad-container-small {
    margin-top: 24px;
    padding: 12px 16px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: var(--radius-sm);
    text-align: left;
}

.ad-container-small .ad-label {
    margin-bottom: 4px;
}

.ad-content-small p {
    font-size: 0.78rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

.ad-content-small a {
    color: var(--accent);
    text-decoration: underline;
    font-weight: 500;
}

.ad-content-small a:hover {
    color: #60a5fa;
}

/* Large Middle Processing Ad (Google Ads Replica) */
.ad-container-banner {
    width: 100%;
    margin-top: 24px;
    background: rgba(15, 15, 25, 0.8);
    border: 2px solid rgba(138, 43, 226, 0.2);
    border-radius: var(--radius-md);
    padding: 20px;
    text-align: left;
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.4);
    overflow: hidden;
    position: relative;
}

.ad-badge {
    position: absolute;
    top: 10px;
    right: 12px;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    color: var(--text-secondary);
    font-size: 0.65rem;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: 4px;
    text-transform: uppercase;
}

.ad-banner-body {
    display: flex;
    gap: 20px;
    align-items: center;
    margin-top: 10px;
}

.ad-banner-graphic {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    background: radial-gradient(circle, rgba(138, 43, 226, 0.2) 0%, rgba(37, 99, 235, 0.2) 100%);
    border: 1px solid rgba(138, 43, 226, 0.3);
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 2rem;
    animation: float 3s ease-in-out infinite;
    flex-shrink: 0;
}

@keyframes float {
    0% { transform: translateY(0px) rotate(0deg); }
    50% { transform: translateY(-8px) rotate(5deg); }
    100% { transform: translateY(0px) rotate(0deg); }
}

.ad-banner-text {
    flex: 1;
    min-width: 0;
}

.ad-banner-text h4 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
}

.ad-banner-text p {
    font-size: 0.82rem;
    color: var(--text-secondary);
    line-height: 1.4;
    margin-bottom: 10px;
}

.btn-ad-action {
    background: linear-gradient(90deg, var(--accent) 0%, var(--primary) 100%);
    border: none;
    color: white;
    font-family: var(--font-sans);
    font-size: 0.78rem;
    font-weight: 600;
    padding: 8px 16px;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    box-shadow: 0 4px 10px rgba(37, 99, 235, 0.2);
}

.btn-ad-action:hover {
    transform: scale(1.03);
    box-shadow: 0 6px 15px rgba(37, 99, 235, 0.4);
}

.ad-footer-info {
    font-size: 0.65rem;
    color: rgba(255, 255, 255, 0.2);
    text-align: center;
    border-top: 1px solid rgba(255, 255, 255, 0.04);
    padding-top: 10px;
    margin-top: 14px;
}

/* Success Download Page Ad */
.ad-container-success {
    width: 100%;
    margin-top: 24px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.01);
    border: 1px solid rgba(255, 255, 255, 0.06);
    border-radius: var(--radius-md);
    text-align: left;
    position: relative;
}

.ad-container-success .ad-label {
    position: absolute;
    top: 10px;
    right: 12px;
}

.ad-success-content h4 {
    font-size: 0.95rem;
    font-weight: 600;
    color: #93c5fd;
    margin-bottom: 6px;
}

.ad-success-content p {
    font-size: 0.8rem;
    color: var(--text-secondary);
    line-height: 1.4;
    margin-bottom: 12px;
}

.btn-success-ad-link {
    display: inline-block;
    color: white;
    background: rgba(255, 255, 255, 0.06);
    border: 1px solid rgba(255, 255, 255, 0.1);
    font-size: 0.78rem;
    font-weight: 500;
    padding: 6px 14px;
    border-radius: 4px;
    text-decoration: none;
    transition: var(--transition);
}

.btn-success-ad-link:hover {
    background: var(--primary);
    border-color: var(--primary);
    box-shadow: 0 0 10px var(--primary-glow);
}

/* Footer styling */
.app-footer {
    border-top: 1px solid var(--card-border);
    padding: 30px 24px;
    text-align: center;
    font-size: 0.8rem;
    color: var(--text-secondary);
    background: rgba(9, 9, 14, 0.6);
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* Responsiveness */
@media (max-width: 768px) {
    .nav-container {
        flex-direction: column;
        gap: 16px;
    }
    
    .hero-section h2 {
        font-size: 1.8rem;
    }
    
    .tool-workspace {
        padding: 20px;
    }
    
    .ad-banner-body {
        flex-direction: column;
        text-align: center;
    }
}

/* iLovePDF-style header — mobile.
   The desktop top-bar nav (JUNTAR/DIVIDIR/CONVERTER/TODAS AS FERRAMENTAS) is
   ~760px wide and overflows narrow screens. Hide it on mobile; the homepage
   grid already lists every tool. Keep the header a tidy row (logo + apps icon)
   and, defensively, keep any header dropdown on-screen and full-width. */
@media (max-width: 900px) {
    #app-header nav { display: none !important; }
    #app-header .nav-container {
        flex-direction: row !important;
        justify-content: space-between !important;
        height: 56px !important;
        padding: 0 14px !important;
        gap: 8px !important;
    }
    #app-header .logo { margin-right: 0 !important; }
    #mega-menu-panel, #nav-converter-panel {
        left: 8px !important;
        right: 8px !important;
        width: auto !important;
        max-width: calc(100vw - 16px) !important;
        max-height: calc(100vh - 70px) !important;
        overflow-y: auto !important;
    }
}

/* ==========================================================================
   Phase 2 Options, Inputs & Files Sorter List
   ========================================================================== */

/* Radio group custom styling for Compress PDF */
.radio-group {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.radio-container {
    display: block;
    position: relative;
    cursor: pointer;
    font-size: 0.88rem;
    color: var(--text-secondary);
    user-select: none;
    line-height: 1.4;
    transition: var(--transition);
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.04);
    border-radius: var(--radius-sm);
    padding: 12px 12px 12px 42px;
}

.radio-container:hover {
    color: var(--text-primary);
    border-color: rgba(255, 255, 255, 0.1);
    background: rgba(255, 255, 255, 0.04);
}

.radio-container input {
    position: absolute;
    opacity: 0;
    cursor: pointer;
    height: 0;
    width: 0;
}

.radiomark {
    position: absolute;
    top: 50%;
    left: 14px;
    transform: translateY(-50%);
    height: 16px;
    width: 16px;
    background-color: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.12);
    border-radius: 50%;
    transition: var(--transition);
}

.radio-container:hover input ~ .radiomark {
    border-color: var(--primary);
}

.radio-container input:checked ~ .radiomark {
    background-color: var(--primary);
    border-color: var(--primary);
    box-shadow: 0 0 8px var(--primary-glow);
}

.radiomark:after {
    content: "";
    position: absolute;
    display: none;
}

.radio-container input:checked ~ .radiomark:after {
    display: block;
}

.radio-container .radiomark:after {
    top: 4px;
    left: 4px;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: white;
}

.option-title {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 0.9rem;
    margin-bottom: 2px;
}

.option-desc {
    display: block;
    font-size: 0.78rem;
    color: var(--text-secondary);
}

/* Split text input style */
.input-group-field {
    display: flex;
    flex-direction: column;
    gap: 8px;
    text-align: left;
}

.input-group-field label {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-input {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.12);
    color: var(--text-primary);
    padding: 10px 14px;
    border-radius: var(--radius-sm);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    outline: none;
    transition: var(--transition);
}

.form-input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 8px var(--primary-glow);
    background: rgba(255, 255, 255, 0.06);
}

.field-help {
    font-size: 0.78rem;
    color: var(--text-secondary);
    line-height: 1.4;
    margin-top: 4px;
}

/* Files Sorter list style for Merge PDF */
.files-sorter-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 250px;
    overflow-y: auto;
    padding-right: 6px;
    margin-top: 10px;
    text-align: left;
}

.sorter-item {
    display: flex;
    align-items: center;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid rgba(255, 255, 255, 0.05);
    border-radius: var(--radius-sm);
    padding: 10px 14px;
    gap: 12px;
    transition: var(--transition);
}

.sorter-item:hover {
    background: rgba(255, 255, 255, 0.04);
    border-color: rgba(255, 255, 255, 0.1);
}

.sorter-item-index {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--primary);
    background: rgba(138, 43, 226, 0.1);
    width: 20px;
    height: 20px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.sorter-item-name {
    flex: 1;
    font-size: 0.82rem;
    font-weight: 500;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text-primary);
}

.sorter-item-size {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-right: 8px;
}

.sorter-actions {
    display: flex;
    gap: 4px;
}

.btn-sort-arrow {
    background: rgba(255, 255, 255, 0.04);
    border: 1px solid rgba(255, 255, 255, 0.08);
    color: var(--text-secondary);
    width: 24px;
    height: 24px;
    border-radius: 4px;
    cursor: pointer;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-sort-arrow svg {
    width: 14px;
    height: 14px;
}

.btn-sort-arrow:hover {
    background: rgba(255, 255, 255, 0.1);
    color: var(--text-primary);
}

.btn-sort-arrow:disabled {
    opacity: 0.15;
    cursor: not-allowed;
}

.btn-sort-remove {
    background: none;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 4px;
    transition: var(--transition);
    display: flex;
    align-items: center;
    justify-content: center;
}

.btn-sort-remove:hover {
    color: var(--danger);
}

/* Tool options panel visibility helper */
.tool-options-panel {
    transition: opacity 0.3s ease;
}

.tool-options-panel.hidden {
    display: none !important;
}

.workspace-tool-title {
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 20px;
    text-shadow: 0 2px 10px rgba(0,0,0,0.3);
    text-align: left;
}

/* ============================================================
   Redesenho Homepage: Agrupamento em Categorias estilo iLovePDF
   ============================================================ */

.categories-container {
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 20px;
}

.categories-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-top: 40px;
}

/* Category Column */
.category-column {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    gap: 16px;
    height: 100%;
}

.category-column:hover {
    border-color: rgba(138, 43, 226, 0.3);
    box-shadow: 0 12px 30px rgba(138, 43, 226, 0.08), inset 0 1px 0 rgba(255,255,255,0.05);
    transform: translateY(-2px);
}

/* Category Title */
.category-title-wrap {
    display: flex;
    align-items: center;
    gap: 8px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.08);
    padding-bottom: 12px;
}

.category-title {
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 1.5px;
    text-transform: uppercase;
    color: var(--text-secondary);
}

/* Category Icon Colors and Glows */
.category-column.cat-organizar .category-title { color: #f87171; text-shadow: 0 0 10px rgba(248, 113, 113, 0.15); }
.category-column.cat-otimizar .category-title { color: #34d399; text-shadow: 0 0 10px rgba(52, 211, 153, 0.15); }
.category-column.cat-converter-em .category-title { color: #fbbf24; text-shadow: 0 0 10px rgba(251, 191, 36, 0.15); }
.category-column.cat-converter-de .category-title { color: #60a5fa; text-shadow: 0 0 10px rgba(96, 165, 250, 0.15); }
.category-column.cat-editar .category-title { color: #c084fc; text-shadow: 0 0 10px rgba(192, 132, 252, 0.15); }
.category-column.cat-seguranca .category-title { color: #38bdf8; text-shadow: 0 0 10px rgba(56, 189, 248, 0.15); }
.category-column.cat-intelligence .category-title { color: #f472b6; text-shadow: 0 0 10px rgba(244, 114, 182, 0.15); }

/* Tool list inside a category */
.tool-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

/* Tool list item */
.tool-item {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 10px 12px;
    border-radius: var(--radius-md);
    cursor: pointer;
    text-decoration: none;
    transition: var(--transition);
    border: 1px solid transparent;
}

/* Active tool item style */
.tool-item.active-tool {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.015);
}

.tool-item.active-tool:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.1);
    transform: translateX(4px);
}

/* Category specific tool item hover borders and glows */
.category-column.cat-organizar .tool-item.active-tool:hover { border-color: rgba(239, 68, 68, 0.3); background: rgba(239, 68, 68, 0.06); }
.category-column.cat-otimizar .tool-item.active-tool:hover { border-color: rgba(16, 185, 129, 0.3); background: rgba(16, 185, 129, 0.06); }
.category-column.cat-converter-em .tool-item.active-tool:hover { border-color: rgba(245, 158, 11, 0.3); background: rgba(245, 158, 11, 0.06); }
.category-column.cat-converter-de .tool-item.active-tool:hover { border-color: rgba(59, 130, 246, 0.3); background: rgba(59, 130, 246, 0.06); }
.category-column.cat-editar .tool-item.active-tool:hover { border-color: rgba(168, 85, 247, 0.3); background: rgba(168, 85, 247, 0.06); }
.category-column.cat-seguranca .tool-item.active-tool:hover { border-color: rgba(14, 165, 233, 0.3); background: rgba(14, 165, 233, 0.06); }
.category-column.cat-intelligence .tool-item.active-tool:hover { border-color: rgba(236, 72, 153, 0.3); background: rgba(236, 72, 153, 0.06); }

/* Disabled tool item style */
.tool-item.disabled {
    opacity: 0.45;
    cursor: not-allowed;
}

.tool-item.disabled:hover {
    background: rgba(255, 255, 255, 0.02);
}

/* Tool icon container */
.tool-item-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    flex-shrink: 0;
    transition: var(--transition);
}

/* Color definitions for the tool icons matching their categories */
.tool-item-icon.organizar { background: rgba(239, 68, 68, 0.12); color: #f87171; }
.tool-item-icon.otimizar { background: rgba(16, 185, 129, 0.12); color: #34d399; }
.tool-item-icon.converter-em { background: rgba(245, 158, 11, 0.12); color: #fbbf24; }
.tool-item-icon.converter-de { background: rgba(59, 130, 246, 0.12); color: #60a5fa; }
.tool-item-icon.editar { background: rgba(168, 85, 247, 0.12); color: #c084fc; }
.tool-item-icon.seguranca { background: rgba(14, 165, 233, 0.12); color: #38bdf8; }
.tool-item-icon.intelligence { background: rgba(236, 72, 153, 0.12); color: #f472b6; }

/* Icon sizes inside items */
.tool-item-icon svg {
    width: 16px;
    height: 16px;
}

/* Tool text label */
.tool-item-name {
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text-primary);
}

/* Badges next to tools */
.tool-item-badge {
    margin-left: auto;
    font-size: 0.65rem;
    font-weight: 600;
    padding: 2px 6px;
    border-radius: 4px;
    letter-spacing: 0.5px;
    text-transform: uppercase;
}

.tool-item-badge.active-badge {
    background: rgba(16, 185, 129, 0.15);
    color: #34d399;
}

.tool-item-badge.soon-badge {
    background: rgba(255, 255, 255, 0.04);
    color: var(--text-secondary);
}

/* Section Intelligence special block at the bottom */
.intelligence-section {
    grid-column: span 3;
    margin-top: 10px;
}

/* Responsive layout adjustments */
@media (max-width: 1100px) {
    .categories-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    .intelligence-section {
        grid-column: span 2;
    }
}

@media (max-width: 768px) {
    .categories-grid {
        grid-template-columns: 1fr;
    }
    .intelligence-section {
        grid-column: span 1;
    }
    .category-column {
        padding: 20px;
    }
}




/* ============================================================
   Estilização do Mega Menu Flutuante (Todas as Ferramentas)
   ============================================================ */

/* Wrapper do Dropdown na Navegação */
.nav-dropdown-wrapper {
    position: relative;
    display: inline-block;
}

/* Ícone de Chevron ao lado do link */
.chevron-icon {
    margin-left: 2px;
    vertical-align: middle;
    transition: transform 0.3s ease;
}

/* Rotacionar Chevron no hover */
.nav-dropdown-wrapper:hover .chevron-icon {
    transform: rotate(180deg);
}

/* Painel do Mega Menu Suspenso */
.mega-menu-panel {
    position: absolute;
    top: calc(100% + 15px);
    left: 50%;
    transform: translateX(-50%) translateY(15px);
    width: 1200px;
    max-width: 95vw;
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(30px);
    -webkit-backdrop-filter: blur(30px);
    border-radius: var(--radius-lg);
    padding: 24px;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.45);
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.3s cubic-bezier(0.4, 0, 0.2, 1), transform 0.3s cubic-bezier(0.4, 0, 0.2, 1), visibility 0.3s;
}

/* Indicador de Caret (Seta) no topo do painel */
.mega-menu-panel::before {
    content: '';
    position: absolute;
    bottom: 100%;
    left: 50%;
    transform: translateX(-50%);
    border-width: 8px;
    border-style: solid;
    border-color: transparent transparent var(--card-border) transparent;
}

/* Exibir Mega Menu no Hover do wrapper */
.nav-dropdown-wrapper:hover .mega-menu-panel {
    opacity: 1;
    visibility: visible;
    transform: translateX(-50%) translateY(0);
}

/* Layout de Grade para as 6 Colunas */
.mega-menu-grid {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 20px;
}

/* Customização das Colunas de Categorias dentro do Mega Menu */
.mega-menu-grid .category-column {
    background: transparent !important;
    border: none !important;
    backdrop-filter: none !important;
    -webkit-backdrop-filter: none !important;
    padding: 0 !important;
    box-shadow: none !important;
    transform: none !important;
    gap: 12px !important;
}

.mega-menu-grid .category-column:hover {
    transform: none !important;
    box-shadow: none !important;
}

.mega-menu-grid .category-title-wrap {
    border-bottom: 1px solid rgba(255, 255, 255, 0.08) !important;
    padding-bottom: 8px !important;
    margin-bottom: 8px !important;
}

/* Itens individuais dentro do menu */
.mega-menu-grid .tool-item {
    padding: 8px 10px !important;
    gap: 8px !important;
}

.mega-menu-grid .tool-item-name {
    font-size: 0.82rem !important;
    font-weight: 500 !important;
}

.mega-menu-grid .tool-item-badge {
    font-size: 0.58rem !important;
    padding: 1px 4px !important;
}

/* Responsividade do Mega Menu */
@media (max-width: 1200px) {
    .mega-menu-panel {
        width: 95vw;
        max-width: 95vw;
    }
}

@media (max-width: 1024px) {
    .mega-menu-panel {
        position: fixed;
        top: 70px;
        left: 2.5vw;
        width: 95vw;
        max-width: 95vw;
        transform: translateY(15px);
        max-height: 80vh;
        overflow-y: auto;
    }
    
    .nav-dropdown-wrapper:hover .mega-menu-panel {
        transform: translateY(0);
    }
    
    .mega-menu-grid {
        grid-template-columns: repeat(3, 1fr);
        gap: 16px;
    }
}

@media (max-width: 768px) {
    .mega-menu-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .mega-menu-grid {
        grid-template-columns: 1fr;
    }
}