/* ============================================
   WALLET DOWNLOAD OFFICIAL WEBSITE
   CSS MAIN STYLESHEET
   ============================================ */

:root {
    --container: 1180px;
    --primary: #0066CC;
    --primary-dark: #0052A3;
    --secondary: #0099FF;
    --success: #00BB33;
    --warning: #FF9900;
    --text-primary: #1F2937;
    --text-secondary: #6B7280;
    --bg-light: #F9FAFB;
    --bg-white: #FFFFFF;
    --border: #E5E7EB;
    --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================================
   RESET & BASE STYLES
   ============================================ */

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--text-primary);
    background-color: var(--bg-white);
    overflow-x: hidden;
}

img {
    max-width: 100%;
    height: auto;
    display: block;
}

.image-box,
.verify-media,
.device-media,
.preview-media,
.local-img-frame {
    overflow: visible;
    line-height: 0;
    padding: 0;
}

.image-box img,
.verify-media img,
.device-media img,
.preview-media img,
.local-img-frame img {
    max-width: 100%;
    height: auto;
    object-fit: contain;
}

a {
    color: var(--primary);
    text-decoration: none;
    transition: var(--transition);
}

a:hover {
    color: var(--primary-dark);
}

button {
    border: none;
    background: none;
    cursor: pointer;
    font-family: inherit;
    font-size: inherit;
}

h1, h2, h3, h4, h5, h6 {
    color: var(--text-primary);
    line-height: 1.3;
    font-weight: 600;
    margin-bottom: 16px;
}

h1 {
    font-size: 42px;
    font-weight: 700;
    margin-bottom: 24px;
}

h2 {
    font-size: 36px;
    margin-bottom: 32px;
    text-align: center;
}

h3 {
    font-size: 24px;
}

h4 {
    font-size: 20px;
    font-weight: 600;
}

p {
    margin-bottom: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
}

ul, ol {
    margin-left: 24px;
    margin-bottom: 16px;
}

ul li, ol li {
    margin-bottom: 8px;
    color: var(--text-secondary);
}

strong {
    font-weight: 600;
    color: var(--text-primary);
}

em {
    font-style: italic;
    color: var(--text-secondary);
}

/* ============================================
   CONTAINER & LAYOUT
   ============================================ */

.container {
    width: min(100% - 32px, var(--container));
    margin-inline: auto;
}

/* ============================================
   PROGRESS BAR
   ============================================ */

.progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    width: 0;
    z-index: 999;
    transition: width 0.3s ease;
}

/* ============================================
   TOP NAVIGATION BAR
   ============================================ */

.nav-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    padding: 16px 0;
    z-index: 100;
    transition: var(--transition);
}

.nav-bar.scrolled {
    padding: 8px 0;
    box-shadow: var(--shadow-md);
}

.nav-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 32px;
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: 8px;
    font-size: 18px;
    font-weight: 700;
    color: var(--primary);
    min-width: 140px;
}

.brand-icon {
    font-size: 24px;
}

.nav-center {
    flex: 1;
    text-align: center;
    font-size: 14px;
    color: var(--text-secondary);
}

.nav-actions {
    display: flex;
    gap: 12px;
}

.nav-btn {
    padding: 8px 16px;
    border-radius: 6px;
    background: transparent;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    transition: var(--transition);
}

.nav-btn:hover {
    background: var(--bg-light);
    color: var(--primary);
}

/* ============================================
   MOBILE MENU
   ============================================ */

.mobile-menu-btn {
    display: none;
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    font-size: 24px;
    box-shadow: var(--shadow-lg);
    z-index: 90;
    transition: var(--transition);
}

.mobile-menu-btn:active {
    transform: scale(0.95);
}

.mobile-menu-drawer {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    max-height: 0;
    background: var(--bg-white);
    border-top: 1px solid var(--border);
    border-top-left-radius: 16px;
    border-top-right-radius: 16px;
    overflow: hidden;
    z-index: 95;
    transition: max-height 0.3s ease;
}

.mobile-menu-drawer.active {
    max-height: 80vh;
    overflow-y: auto;
}

.menu-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 20px 16px;
    border-bottom: 1px solid var(--border);
}

.menu-header h3 {
    margin: 0;
    font-size: 18px;
}

.menu-close {
    width: 32px;
    height: 32px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 20px;
    color: var(--text-secondary);
}

.menu-items {
    padding: 16px 0;
}

.menu-item {
    display: block;
    padding: 16px 24px;
    color: var(--text-primary);
    border-bottom: 1px solid var(--border);
    transition: var(--transition);
}

.menu-item:hover {
    background: var(--bg-light);
    color: var(--primary);
}

/* ============================================
   BUTTONS
   ============================================ */

.btn {
    padding: 12px 32px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    display: inline-block;
}

.btn-primary {
    background: var(--primary);
    color: white;
}

.btn-primary:hover {
    background: var(--primary-dark);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    background: transparent;
    color: var(--primary);
    border: 2px solid var(--primary);
}

.btn-secondary:hover {
    background: var(--primary);
    color: white;
}

/* ============================================
   HERO SECTION
   ============================================ */

.hero {
    padding: 120px 0 60px;
    margin-top: 60px;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: center;
    margin-bottom: 60px;
}

.section-label {
    display: inline-block;
    padding: 8px 16px;
    background: #E3F2FD;
    color: var(--primary);
    border-radius: 20px;
    font-size: 12px;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 16px;
}

.hero-left h1 {
    color: var(--text-primary);
    line-height: 1.2;
    margin-bottom: 24px;
}

.hero-description {
    font-size: 16px;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 32px;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    margin-bottom: 32px;
}

.hero-warning {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    padding: 16px;
    background: #FFFBEA;
    border-radius: 8px;
    border-left: 4px solid var(--warning);
    font-size: 14px;
    color: var(--text-secondary);
}

.warning-icon {
    flex-shrink: 0;
    font-size: 18px;
}

/* Hero Right - Verify Panel */

.verify-panel {
    background: linear-gradient(135deg, #F0F7FF 0%, #FFFFFF 100%);
    border-radius: 16px;
    padding: 32px;
    border: 1px solid #E0EDFF;
    box-shadow: 0 8px 24px rgba(0, 102, 204, 0.08);
}

.verify-media {
    margin-bottom: 24px;
    border-radius: 12px;
    overflow: hidden;
    background: white;
    border: 1px solid var(--border);
}

.verify-badges {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.badge {
    padding: 12px 16px;
    background: white;
    border-radius: 8px;
    border: 1px solid var(--border);
    text-align: center;
}

.badge-label {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
    margin-bottom: 4px;
    font-weight: 500;
}

.badge-value {
    display: block;
    font-size: 14px;
    color: var(--primary);
    font-weight: 700;
}

/* Hero Bottom Info */

.hero-bottom {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
}

.info-card {
    display: flex;
    gap: 16px;
    padding: 20px;
    background: var(--bg-light);
    border-radius: 12px;
    border: 1px solid var(--border);
    transition: var(--transition);
}

.info-card:hover {
    background: white;
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

.card-icon {
    font-size: 28px;
    flex-shrink: 0;
}

.card-text h4 {
    margin: 0 0 4px 0;
    font-size: 16px;
}

.card-text p {
    margin: 0;
    font-size: 14px;
    color: var(--text-secondary);
}

/* ============================================
   VERIFY SECTION
   ============================================ */

.verify-section {
    padding: 80px 0;
    background: linear-gradient(180deg, var(--bg-light) 0%, var(--bg-white) 100%);
}

.verify-container {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: 48px;
}

.verify-tabs {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.verify-tab {
    padding: 12px 16px;
    text-align: left;
    border-radius: 8px;
    background: transparent;
    color: var(--text-secondary);
    font-weight: 500;
    border: 2px solid transparent;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
}

.verify-tab:hover,
.verify-tab.active {
    background: var(--bg-light);
    color: var(--primary);
    border-color: var(--primary);
}

.tab-icon {
    font-size: 16px;
    flex-shrink: 0;
}

.verify-content {
    position: relative;
}

.verify-item {
    display: none;
    opacity: 0;
    animation: fadeIn 0.3s ease;
}

.verify-item.active {
    display: block;
    opacity: 1;
}

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

.verify-item h3 {
    color: var(--text-primary);
    margin-bottom: 16px;
}

.verify-item p {
    margin-bottom: 12px;
}

.verify-img {
    margin-top: 24px;
    border-radius: 12px;
    overflow: hidden;
    background: white;
    border: 1px solid var(--border);
}

.verify-img img {
    width: 100%;
    height: auto;
    display: block;
}

/* ============================================
   DEVICE SECTION
   ============================================ */

.device-section {
    padding: 80px 0;
}

.device-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 32px;
}

.device-card {
    background: white;
    border-radius: 12px;
    border: 1px solid var(--border);
    overflow: hidden;
    transition: var(--transition);
}

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

.device-header {
    padding: 24px;
    background: linear-gradient(135deg, #E3F2FD 0%, #F3F9FF 100%);
    border-bottom: 1px solid var(--border);
}

.device-header h3 {
    margin: 0;
    font-size: 20px;
}

.device-media {
    height: 300px;
    background: white;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: visible;
    line-height: 0;
    padding: 0;
}

.device-media img {
    width: 100%;
    height: 100%;
    object-fit: contain;
}

.device-body {
    padding: 24px;
}

.device-body p {
    font-size: 14px;
    margin-bottom: 12px;
}

.device-status {
    margin-top: 20px;
    padding: 12px 16px;
    background: #F0FFF4;
    border-left: 4px solid var(--success);
    border-radius: 4px;
    font-size: 14px;
    color: #22C55E;
    font-weight: 500;
}

/* ============================================
   VERSION SECTION
   ============================================ */

.version-section {
    padding: 80px 0;
    background: var(--bg-light);
}

.version-container {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 48px;
}

.version-list {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.version-item {
    padding: 12px 16px;
    background: transparent;
    border: 2px solid transparent;
    border-radius: 8px;
    text-align: left;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
}

.version-item:hover,
.version-item.active {
    background: white;
    color: var(--primary);
    border-color: var(--primary);
}

.version-icon {
    flex-shrink: 0;
    font-size: 16px;
}

.version-content {
    background: white;
    border-radius: 12px;
    padding: 32px;
    border: 1px solid var(--border);
}

.version-panel {
    display: none;
}

.version-panel.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

.version-panel h3 {
    color: var(--text-primary);
    margin-bottom: 20px;
}

.info-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 24px;
}

.info-row {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 16px;
    padding: 12px 0;
    border-bottom: 1px solid var(--border);
}

.info-row .label {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 14px;
}

.info-row .value {
    color: var(--primary);
    font-weight: 600;
}

.system-reqs {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 20px;
    margin-bottom: 24px;
}

.req-item {
    padding: 16px;
    background: var(--bg-light);
    border-radius: 8px;
    border-left: 4px solid var(--primary);
}

.req-label {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 4px;
    font-size: 14px;
}

.req-desc {
    display: block;
    font-size: 14px;
    color: var(--text-secondary);
}

.features-list {
    list-style: none;
    margin: 0 0 24px 0;
}

.features-list li {
    padding: 10px 0;
    font-size: 14px;
    color: var(--text-secondary);
    margin: 0;
}

.update-log {
    margin-top: 16px;
}

.log-entry {
    padding: 16px;
    margin-bottom: 12px;
    background: var(--bg-light);
    border-radius: 8px;
    border-left: 4px solid var(--primary);
}

.log-version {
    display: inline-block;
    background: var(--primary);
    color: white;
    padding: 2px 8px;
    border-radius: 4px;
    font-size: 12px;
    font-weight: 600;
    margin-right: 8px;
}

.log-date {
    font-size: 12px;
    color: var(--text-secondary);
}

.log-entry p {
    margin: 8px 0 0 0;
    font-size: 14px;
}

.permission-list {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 16px;
}

.perm-item {
    padding: 16px;
    background: var(--bg-light);
    border-radius: 8px;
    text-align: center;
}

.perm-icon {
    display: block;
    font-size: 28px;
    margin-bottom: 8px;
}

.perm-name {
    display: block;
    font-weight: 600;
    color: var(--text-primary);
    font-size: 14px;
    margin-bottom: 4px;
}

.perm-desc {
    display: block;
    font-size: 12px;
    color: var(--text-secondary);
}

/* ============================================
   INSTALL SECTION
   ============================================ */

.install-section {
    padding: 80px 0;
    background: linear-gradient(180deg, var(--bg-white) 0%, var(--bg-light) 100%);
}

.install-grid {
    display: grid;
    grid-template-columns: 1fr 380px;
    gap: 48px;
    align-items: start;
}

.steps-panel {
    background: white;
    border-radius: 12px;
    border: 1px solid var(--border);
    padding: 0;
    overflow: hidden;
}

.step {
    padding: 24px;
    border-bottom: 1px solid var(--border);
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 20px;
    transition: var(--transition);
    cursor: pointer;
}

.step:last-child {
    border-bottom: none;
}

.step:hover {
    background: var(--bg-light);
}

.step-number {
    font-size: 24px;
    font-weight: 700;
    color: var(--primary);
    text-align: center;
}

.step-content h4 {
    margin: 0 0 8px 0;
    color: var(--text-primary);
}

.step-content p {
    margin: 8px 0;
    font-size: 14px;
}

.step-content em {
    display: block;
    margin-top: 12px;
    padding-top: 12px;
    border-top: 1px solid var(--border);
}

.install-visual {
    background: white;
    border-radius: 12px;
    border: 1px solid var(--border);
    padding: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 500px;
}

.install-visual img {
    width: 100%;
    height: auto;
    object-fit: contain;
}

/* ============================================
   PREVIEW SECTION
   ============================================ */

.preview-section {
    padding: 80px 0;
    background: var(--bg-light);
}

.preview-container {
    display: grid;
    grid-template-columns: 120px 1fr;
    gap: 32px;
    align-items: start;
}

.preview-thumbnails {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.preview-thumb {
    width: 100px;
    height: 100px;
    border-radius: 8px;
    border: 2px solid transparent;
    overflow: hidden;
    padding: 0;
    transition: var(--transition);
    background: white;
    cursor: pointer;
}

.preview-thumb:hover,
.preview-thumb.active {
    border-color: var(--primary);
    box-shadow: var(--shadow-md);
}

.preview-thumb img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.preview-main {
    display: grid;
    grid-template-columns: 1fr;
    gap: 24px;
}

.preview-display {
    background: white;
    border-radius: 12px;
    border: 1px solid var(--border);
    padding: 16px;
    min-height: 400px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.preview-display img {
    width: 100%;
    height: auto;
    object-fit: contain;
    max-height: 500px;
}

.preview-desc {
    background: white;
    border-radius: 12px;
    padding: 24px;
    border: 1px solid var(--border);
}

.preview-desc h3 {
    margin: 0 0 12px 0;
    font-size: 20px;
}

.preview-desc p {
    margin: 0;
    font-size: 14px;
}

/* ============================================
   SECURITY SECTION
   ============================================ */

.security-section {
    padding: 80px 0;
}

.security-container {
    margin-bottom: 60px;
}

.security-tabs {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 12px;
    margin-bottom: 32px;
}

.security-tab {
    padding: 12px 16px;
    background: white;
    border: 1px solid var(--border);
    border-radius: 8px;
    text-align: center;
    color: var(--text-secondary);
    font-weight: 500;
    font-size: 14px;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 6px;
}

.security-tab:hover,
.security-tab.active {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
}

.security-tab .tab-icon {
    font-size: 18px;
}

.security-content {
    background: white;
    border-radius: 12px;
    border: 1px solid var(--border);
    padding: 32px;
}

.security-item {
    display: none;
}

.security-item.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

.security-item h3 {
    color: var(--text-primary);
    margin-bottom: 20px;
}

.safety-card {
    background: var(--bg-light);
    border-radius: 12px;
    padding: 20px;
}

.safety-card p {
    margin-bottom: 16px;
    font-size: 14px;
}

.safety-card strong {
    color: var(--text-primary);
}

.safety-card ul {
    margin: 8px 0 0 24px;
}

.safety-card ul li {
    font-size: 14px;
    margin-bottom: 6px;
}

.security-summary {
    background: linear-gradient(135deg, #E3F2FD 0%, #F3F9FF 100%);
    border-radius: 12px;
    padding: 32px;
    border: 1px solid #E0EDFF;
}

.security-summary h3 {
    text-align: center;
    margin-bottom: 24px;
    color: var(--text-primary);
}

.summary-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
}

.summary-item {
    background: white;
    padding: 16px;
    border-radius: 8px;
    text-align: center;
    border-left: 4px solid var(--warning);
}

.summary-item p {
    margin: 0;
    font-size: 14px;
}

.summary-item .summary-icon {
    display: block;
    font-size: 28px;
    margin-bottom: 8px;
}

.summary-item strong {
    color: var(--text-primary);
}

/* ============================================
   FEATURES SECTION
   ============================================ */

.features-section {
    padding: 80px 0;
    background: var(--bg-light);
}

.features-container {
    display: grid;
    grid-template-columns: 220px 1fr;
    gap: 48px;
}

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

.feature-nav {
    padding: 12px 16px;
    background: transparent;
    border: 2px solid transparent;
    border-radius: 8px;
    text-align: left;
    color: var(--text-secondary);
    font-weight: 500;
    transition: var(--transition);
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
}

.feature-nav:hover,
.feature-nav.active {
    background: white;
    color: var(--primary);
    border-color: var(--primary);
}

.feature-icon {
    flex-shrink: 0;
    font-size: 16px;
}

.features-main {
    background: white;
    border-radius: 12px;
    padding: 32px;
    border: 1px solid var(--border);
}

.feature-detail {
    display: none;
}

.feature-detail.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

.feature-detail h3 {
    color: var(--text-primary);
    margin-bottom: 16px;
}

.feature-detail p {
    margin-bottom: 12px;
    font-size: 14px;
}

.feature-detail strong {
    color: var(--text-primary);
}

.feature-detail ul {
    margin: 8px 0 0 24px;
}

.feature-detail ul li {
    font-size: 14px;
    margin-bottom: 6px;
}

/* ============================================
   CONFIRM SECTION
   ============================================ */

.confirm-section {
    padding: 80px 0;
}

.confirm-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 48px;
    align-items: start;
}

.confirm-items {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.confirm-item {
    background: white;
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
    transition: var(--transition);
}

.confirm-item:hover {
    border-color: var(--primary);
    background: #F9FAFB;
}

.confirm-check {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 12px;
}

.confirm-check input {
    width: 20px;
    height: 20px;
    cursor: pointer;
    accent-color: var(--primary);
}

.confirm-check label {
    display: flex;
    align-items: center;
    gap: 10px;
    cursor: pointer;
    flex: 1;
    margin: 0;
}

.check-box {
    width: 20px;
    height: 20px;
    border: 2px solid var(--border);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
    color: white;
    background: white;
    transition: var(--transition);
}

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

.check-text {
    font-weight: 600;
    color: var(--text-primary);
    font-size: 15px;
}

.confirm-item p {
    margin: 0;
    font-size: 14px;
    color: var(--text-secondary);
}

.confirm-result {
    background: white;
    border-radius: 12px;
    border: 1px solid var(--border);
    padding: 32px;
    text-align: center;
    min-height: 300px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.result-empty {
    color: var(--text-secondary);
    font-size: 16px;
}

.result-complete {
    width: 100%;
}

.result-icon {
    font-size: 48px;
    color: var(--success);
    margin-bottom: 16px;
    animation: scaleIn 0.5s ease;
}

@keyframes scaleIn {
    from {
        transform: scale(0);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

.result-complete h3 {
    margin: 0 0 16px 0;
    color: var(--text-primary);
}

.result-complete p {
    margin: 0;
    font-size: 14px;
    color: var(--text-secondary);
}

/* ============================================
   FAQ SECTION
   ============================================ */

.faq-section {
    padding: 80px 0;
    background: var(--bg-light);
}

.faq-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 32px;
}

.faq-category {
    background: white;
    border-radius: 12px;
    border: 1px solid var(--border);
    overflow: hidden;
}

.category-title {
    padding: 20px;
    margin: 0;
    background: linear-gradient(135deg, #E3F2FD 0%, #F3F9FF 100%);
    border-bottom: 1px solid var(--border);
    font-size: 18px;
    color: var(--primary);
}

.faq-items {
    padding: 0;
}

.faq-item {
    border-bottom: 1px solid var(--border);
}

.faq-item:last-child {
    border-bottom: none;
}

.faq-question {
    width: 100%;
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: transparent;
    color: var(--text-primary);
    font-weight: 600;
    font-size: 15px;
    text-align: left;
    transition: var(--transition);
}

.faq-question:hover {
    background: var(--bg-light);
    color: var(--primary);
}

.faq-icon {
    flex-shrink: 0;
    transition: var(--transition);
    font-size: 18px;
    font-weight: 700;
}

.faq-question.active .faq-icon {
    transform: rotate(45deg);
}

.faq-answer {
    padding: 0 20px 20px 20px;
    color: var(--text-secondary);
    font-size: 14px;
    line-height: 1.8;
    animation: slideDown 0.3s ease;
}

@keyframes slideDown {
    from {
        opacity: 0;
        max-height: 0;
    }
    to {
        opacity: 1;
        max-height: 1000px;
    }
}

.faq-answer p {
    margin: 0;
}

/* ============================================
   FOOTER
   ============================================ */

.footer {
    background: linear-gradient(180deg, #1F2937 0%, #111827 100%);
    color: #D1D5DB;
    padding: 60px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 48px;
    margin-bottom: 32px;
}

.footer-section h4 {
    color: white;
    margin-bottom: 16px;
    font-size: 16px;
}

.footer-section p {
    font-size: 14px;
    color: #D1D5DB;
    line-height: 1.8;
    margin: 0;
}

.footer-section ul {
    list-style: none;
    margin: 0;
}

.footer-section ul li {
    margin-bottom: 10px;
    font-size: 14px;
}

.footer-section ul li a {
    color: #D1D5DB;
    text-decoration: none;
    transition: var(--transition);
}

.footer-section ul li a:hover {
    color: white;
}

.footer-divider {
    height: 1px;
    background: rgba(255, 255, 255, 0.1);
    margin: 32px 0;
}

.footer-bottom {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 32px;
    align-items: center;
    font-size: 13px;
    color: #9CA3AF;
}

.footer-left p {
    margin: 0;
    line-height: 1.6;
}

.footer-right p {
    margin: 0;
    text-align: right;
}

/* ============================================
   BACK TO TOP BUTTON
   ============================================ */

.back-to-top {
    position: fixed;
    bottom: 32px;
    right: 32px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--primary);
    color: white;
    font-size: 20px;
    font-weight: 700;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-lg);
    opacity: 0;
    visibility: hidden;
    transition: var(--transition);
    z-index: 80;
}

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

.back-to-top:hover {
    background: var(--primary-dark);
    transform: translateY(-2px);
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

@media (max-width: 1024px) {
    :root {
        --container: 100%;
    }

    .hero-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .verify-container {
        grid-template-columns: 160px 1fr;
        gap: 32px;
    }

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

    .version-container {
        grid-template-columns: 160px 1fr;
    }

    .install-grid {
        grid-template-columns: 1fr;
        gap: 32px;
    }

    .install-visual {
        min-height: 300px;
    }

    .preview-container {
        grid-template-columns: 100px 1fr;
    }

    .security-tabs {
        grid-template-columns: repeat(3, 1fr);
    }

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

    .features-container {
        grid-template-columns: 160px 1fr;
    }

    .confirm-container {
        grid-template-columns: 1fr;
    }

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

    .faq-container {
        grid-template-columns: 1fr;
    }

    .footer-content {
        grid-template-columns: repeat(2, 1fr);
        gap: 32px;
    }
}

@media (max-width: 768px) {
    .nav-center {
        display: none;
    }

    .nav-actions {
        display: none;
    }

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

    .hero {
        padding: 80px 0 40px;
        margin-top: 70px;
    }

    h1 {
        font-size: 32px;
    }

    h2 {
        font-size: 28px;
        margin-bottom: 24px;
    }

    .hero-buttons {
        flex-direction: column;
    }

    .btn {
        width: 100%;
        padding: 14px 24px;
    }

    .verify-container {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .verify-tabs {
        flex-direction: row;
        overflow-x: auto;
        gap: 8px;
    }

    .verify-tab {
        white-space: nowrap;
        flex-shrink: 0;
        padding: 10px 14px;
        font-size: 13px;
    }

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

    .version-container {
        grid-template-columns: 1fr;
    }

    .version-item {
        display: none;
    }

    .version-item.active {
        display: flex;
    }

    .features-container {
        grid-template-columns: 1fr;
    }

    .feature-nav {
        display: none;
    }

    .feature-nav.active {
        display: flex;
    }

    .features-main {
        padding: 24px;
    }

    .security-tabs {
        grid-template-columns: repeat(2, 1fr);
        gap: 8px;
    }

    .security-tab {
        padding: 10px 8px;
        font-size: 12px;
    }

    .security-tab .tab-icon {
        font-size: 16px;
    }

    .preview-container {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .preview-thumbnails {
        flex-direction: row;
        overflow-x: auto;
        gap: 10px;
    }

    .preview-thumb {
        width: 80px;
        height: 80px;
        flex-shrink: 0;
    }

    .hero-bottom {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .info-card {
        gap: 12px;
        padding: 16px;
    }

    .card-icon {
        font-size: 24px;
    }

    .card-text h4 {
        font-size: 14px;
    }

    .card-text p {
        font-size: 12px;
    }

    .confirm-container {
        gap: 24px;
    }

    .summary-grid {
        grid-template-columns: 1fr !important;
    }

    .security-summary {
        padding: 20px;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: 24px;
    }

    .footer-bottom {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .footer-right p {
        text-align: left;
    }

    .step {
        grid-template-columns: 70px 1fr;
        gap: 16px;
        padding: 16px;
    }

    .step-number {
        font-size: 20px;
    }

    .step-content h4 {
        font-size: 16px;
    }

    .step-content p {
        font-size: 13px;
    }

    .faq-question {
        padding: 16px;
        font-size: 14px;
    }

    .faq-answer {
        padding: 0 16px 16px 16px;
    }

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

    .system-reqs {
        grid-template-columns: 1fr;
    }

    .permission-list {
        grid-template-columns: 1fr;
    }

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

@media (max-width: 480px) {
    .container {
        width: 100%;
        padding: 0 16px;
    }

    h1 {
        font-size: 24px;
        margin-bottom: 16px;
    }

    h2 {
        font-size: 22px;
        margin-bottom: 16px;
    }

    h3 {
        font-size: 18px;
    }

    h4 {
        font-size: 16px;
    }

    body {
        font-size: 14px;
    }

    p {
        font-size: 14px;
    }

    .nav-bar {
        padding: 12px 0;
    }

    .nav-brand {
        font-size: 16px;
        min-width: auto;
    }

    .brand-text {
        display: none;
    }

    .hero {
        padding: 60px 0 30px;
        margin-top: 60px;
    }

    .hero-description {
        font-size: 14px;
        margin-bottom: 24px;
    }

    .section-label {
        font-size: 11px;
        padding: 6px 12px;
    }

    .verify-panel {
        padding: 16px;
    }

    .verify-badges {
        grid-template-columns: 1fr;
    }

    .badge {
        padding: 10px 12px;
        font-size: 12px;
    }

    .badge-value {
        font-size: 13px;
    }

    .hero-bottom {
        grid-template-columns: 1fr;
        gap: 12px;
    }

    .info-card {
        gap: 10px;
        padding: 12px;
    }

    .card-icon {
        font-size: 20px;
    }

    .card-text h4 {
        font-size: 13px;
    }

    .card-text p {
        font-size: 11px;
    }

    .verify-tab {
        padding: 10px 12px;
        font-size: 13px;
        gap: 6px;
    }

    .verify-item p {
        font-size: 13px;
    }

    .device-header h3 {
        font-size: 18px;
    }

    .device-media {
        height: 250px;
    }

    .device-body p {
        font-size: 13px;
    }

    .device-status {
        font-size: 13px;
    }

    .step {
        grid-template-columns: 60px 1fr;
        gap: 12px;
        padding: 12px;
    }

    .step-number {
        font-size: 18px;
    }

    .step-content h4 {
        font-size: 15px;
        margin-bottom: 6px;
    }

    .step-content p {
        font-size: 12px;
    }

    .install-visual {
        padding: 12px;
        min-height: 200px;
    }

    .preview-display {
        padding: 12px;
        min-height: 300px;
    }

    .preview-desc {
        padding: 16px;
    }

    .preview-desc h3 {
        font-size: 16px;
    }

    .preview-desc p {
        font-size: 12px;
    }

    .security-content {
        padding: 20px;
    }

    .safety-card {
        padding: 16px;
    }

    .safety-card p {
        font-size: 13px;
        margin-bottom: 12px;
    }

    .confirm-item {
        padding: 16px;
    }

    .confirm-result {
        padding: 20px;
    }

    .result-icon {
        font-size: 40px;
    }

    .faq-question {
        padding: 14px;
        font-size: 13px;
    }

    .faq-answer {
        padding: 0 14px 14px 14px;
        font-size: 13px;
    }

    .confirm-check input {
        width: 18px;
        height: 18px;
    }

    .check-text {
        font-size: 14px;
    }

    .category-title {
        padding: 16px;
        font-size: 16px;
    }

    .footer-section h4 {
        font-size: 14px;
    }

    .footer-section p {
        font-size: 13px;
    }

    .footer-section ul li {
        font-size: 13px;
    }

    .back-to-top {
        width: 44px;
        height: 44px;
        bottom: 24px;
        right: 16px;
        font-size: 18px;
    }

    .mobile-menu-btn {
        width: 48px;
        height: 48px;
        bottom: 24px;
        right: 16px;
        font-size: 20px;
    }
}

/* ============================================
   PRINT STYLES
   ============================================ */

@media print {
    body {
        background: white;
    }

    .nav-bar,
    .mobile-menu-btn,
    .back-to-top,
    .progress-bar {
        display: none;
    }

    section {
        page-break-inside: avoid;
    }
}