/* ==========================================
   UPTREND PRO - SIMPLIZE STYLE DESIGN SYSTEM
   ========================================== */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Fraunces:ital,opsz,wght@0,9..144,400;0,9..144,600;0,9..144,800;1,9..144,600&family=IBM+Plex+Mono:wght@400;500;600&display=swap');

:root {
    /* Color Palette - Premium Dark (Simplize Theme) */
    --bg-main: #060813;
    --bg-card: #111422;
    --bg-card-hover: #161a2e;
    --bg-featured-card: linear-gradient(180deg, rgba(255, 122, 0, 0.05) 0%, #111422 100%);
    
    --border-color: rgba(255, 255, 255, 0.08);
    --border-accent: rgba(255, 122, 0, 0.25);
    
    --text-primary: #ffffff;
    --text-secondary: #9aa4b7;
    --text-muted: #64748b;
    
    --orange-primary: #FF7A00;
    --orange-bright: #FF9E40;
    --orange-gradient: linear-gradient(135deg, #FF9E40 0%, #FF7A00 100%);
    --orange-glow: rgba(255, 122, 0, 0.2);
    
    --blue-primary: #0070F3;
    --blue-gradient: linear-gradient(135deg, #0070F3 0%, #002280 100%);
    
    --signal-green: #10B981;
    --signal-green-bg: rgba(16, 185, 129, 0.1);
    --risk-red: #EF4444;
    --risk-red-bg: rgba(239, 68, 68, 0.1);
    
    --sans-font: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    --serif-font: 'Fraunces', Georgia, serif;
    --mono-font: 'IBM Plex Mono', monospace;
    
    --transition-smooth: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --border-radius-lg: 16px;
    --border-radius-md: 10px;
    --shadow-premium: 0 25px 50px -12px rgba(0, 0, 0, 0.6);
}

/* Light Mode Override */
body.light-theme {
    --bg-main: #f4f6f9;
    --bg-card: #ffffff;
    --bg-card-hover: #f9fafb;
    --bg-featured-card: linear-gradient(180deg, rgba(255, 122, 0, 0.08) 0%, #ffffff 100%);
    
    --border-color: rgba(0, 0, 0, 0.08);
    --border-accent: rgba(255, 122, 0, 0.35);
    
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;
    
    --orange-primary: #e66e00;
    --orange-bright: #ff851a;
    --orange-glow: rgba(230, 110, 0, 0.15);
    
    --blue-primary: #0066de;
    --shadow-premium: 0 15px 35px rgba(0, 0, 0, 0.06);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--bg-main);
    color: var(--text-primary);
    font-family: var(--sans-font);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color 0.3s ease, color 0.3s ease;
    background-image: 
        radial-gradient(circle at 50% -20%, rgba(255, 122, 0, 0.05) 0%, transparent 60%),
        radial-gradient(circle at 10% 80%, rgba(0, 112, 243, 0.03) 0%, transparent 50%);
    background-attachment: scroll;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 24px;
}

/* Helper styles */
.orange-text {
    color: var(--orange-primary);
    background: var(--orange-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    font-weight: 800;
}

.mono { font-family: var(--mono-font); }
.serif { font-family: var(--serif-font); }

/* Header & Nav */
header {
    position: sticky;
    top: 0;
    z-index: 100;
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    background-color: rgba(6, 8, 19, 0.85);
    border-bottom: 1px solid var(--border-color);
    transition: var(--transition-smooth);
}

body.light-theme header {
    background-color: rgba(244, 246, 249, 0.85);
}

.nav-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 8px;
    text-decoration: none;
    font-size: 1.35rem;
    font-weight: 900;
    color: var(--text-primary);
    letter-spacing: -0.5px;
}

.brand span {
    color: var(--orange-primary);
}

.nav-menu {
    display: flex;
    gap: 20px;
    list-style: none;
}

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

.nav-menu a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.88rem;
    font-weight: 500;
    transition: var(--transition-smooth);
}

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

.nav-right {
    display: flex;
    align-items: center;
    gap: 16px;
}

.theme-btn {
    background: none;
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    width: 38px;
    height: 38px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.theme-btn:hover {
    border-color: var(--orange-primary);
    color: var(--orange-primary);
}

.nav-cta {
    background: var(--orange-gradient);
    color: #060813 !important;
    font-weight: 700;
    padding: 9px 18px;
    border-radius: var(--border-radius-md);
    font-size: 0.85rem;
    text-decoration: none;
    transition: var(--transition-smooth);
    box-shadow: 0 4px 14px rgba(255, 122, 0, 0.3);
}

.nav-cta:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(255, 122, 0, 0.4);
}

/* Hero Section (Simplize style) */
.hero-section {
    padding: 60px 0;
    text-align: center;
}

.hero-section h1 {
    font-size: clamp(2.2rem, 5vw, 3.5rem);
    line-height: 1.15;
    font-weight: 900;
    letter-spacing: -1px;
    margin-bottom: 18px;
}

.hero-section .sub {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 680px;
    margin: 0 auto 30px;
    line-height: 1.5;
}

.hero-ctas {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 40px;
}

.btn-hero {
    padding: 12px 24px;
    border-radius: var(--border-radius-md);
    font-weight: 700;
    font-size: 0.9rem;
    text-decoration: none;
    transition: var(--transition-smooth);
}

.btn-hero.primary {
    background: rgba(255, 255, 255, 0.08);
    color: #fff;
    border: 1px solid var(--border-color);
}

body.light-theme .btn-hero.primary {
    background: #fff;
    color: #0f172a;
}

.btn-hero.primary:hover {
    border-color: var(--orange-primary);
}

.btn-hero.accent {
    background: var(--orange-gradient);
    color: #060813;
    box-shadow: 0 4px 14px rgba(255, 122, 0, 0.25);
}

.btn-hero.accent:hover {
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(255, 122, 0, 0.4);
}

/* Section Dividers / Subheads */
.section-intro-bar {
    padding: 30px 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
    background: rgba(255, 255, 255, 0.01);
}

.section-intro-bar h2 {
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 800;
}

.section-intro-bar p {
    font-size: 0.95rem;
    color: var(--text-secondary);
    margin-top: 6px;
}

/* Pricing Grid */
.pricing-container {
    max-width: 1000px;
    margin: 0 auto;
    position: relative;
    z-index: 10;
}

.pricing-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
    align-items: stretch;
    margin-bottom: 24px;
}

.price-card {
    background: var(--bg-card);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 40px 24px 32px;
    position: relative;
    display: flex;
    flex-direction: column;
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-premium);
}

.price-card:hover {
    transform: translateY(-4px);
    border-color: rgba(255, 255, 255, 0.15);
}

body.light-theme .price-card:hover {
    border-color: rgba(0, 0, 0, 0.15);
}

/* Professional Annual Highlights (Simplize main plan) */
.price-card.featured {
    border-color: var(--orange-primary);
    background: var(--bg-featured-card);
    transform: scale(1.03);
}

.price-card.featured:hover {
    transform: translateY(-4px) scale(1.03);
    box-shadow: 0 25px 60px -10px rgba(255, 122, 0, 0.15);
}

.saving-badge {
    position: absolute;
    top: -14px;
    left: 50%;
    transform: translateX(-50%);
    background: var(--orange-gradient);
    color: #060813;
    font-size: 0.7rem;
    font-weight: 800;
    padding: 5px 14px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    white-space: nowrap;
}

.plan-title {
    font-size: 1.15rem;
    font-weight: 700;
    margin-bottom: 16px;
    color: var(--text-secondary);
}

.price-card.featured .plan-title {
    color: var(--text-primary);
}

.price-amount {
    font-size: 2.1rem;
    font-weight: 900;
    color: var(--text-primary);
    line-height: 1;
}

.price-card.featured .price-amount {
    color: var(--orange-primary);
}

.price-period {
    font-size: 0.82rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.price-original {
    font-size: 0.85rem;
    color: var(--text-muted);
    text-decoration: line-through;
    margin-top: 4px;
    min-height: 20px;
}

/* Pricing Buttons */
.btn-pricing {
    width: 100%;
    padding: 12px;
    border-radius: var(--border-radius-md);
    font-weight: 700;
    font-size: 0.88rem;
    text-decoration: none;
    text-align: center;
    margin: 24px 0 24px;
    border: none;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.btn-gray {
    background: rgba(255, 255, 255, 0.06);
    color: var(--text-primary);
}

body.light-theme .btn-gray {
    background: rgba(0, 0, 0, 0.05);
}

.btn-gray:hover {
    background: rgba(255, 255, 255, 0.12);
}

body.light-theme .btn-gray:hover {
    background: rgba(0, 0, 0, 0.1);
}

.btn-orange {
    background: var(--orange-gradient);
    color: #060813;
    box-shadow: 0 4px 14px rgba(255, 122, 0, 0.25);
}

.btn-orange:hover {
    box-shadow: 0 6px 20px rgba(255, 122, 0, 0.4);
    transform: translateY(-1px);
}

.btn-blue {
    background: var(--blue-primary);
    color: #ffffff;
    box-shadow: 0 4px 14px rgba(0, 112, 243, 0.25);
}

.btn-blue:hover {
    box-shadow: 0 6px 20px rgba(0, 112, 243, 0.4);
    transform: translateY(-1px);
}

/* Pricing Feature Checklist */
.plan-features {
    list-style: none;
    text-align: left;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.plan-features li {
    font-size: 0.82rem;
    color: var(--text-secondary);
    display: flex;
    align-items: flex-start;
    gap: 8px;
    line-height: 1.4;
}

.plan-features li::before {
    content: "✓";
    color: var(--orange-primary);
    font-weight: 800;
    font-size: 0.9rem;
}

.plan-features li.disabled {
    color: var(--text-muted);
    opacity: 0.5;
}

.plan-features li.disabled::before {
    content: "✕";
    color: var(--text-muted);
}

/* Entry Phễu Bottom Link */
.entry-funnel-link {
    margin-top: 24px;
    font-size: 0.85rem;
    color: var(--text-muted);
}

.entry-funnel-link a {
    color: var(--orange-primary);
    text-decoration: underline;
    font-weight: 600;
}

.entry-funnel-link a:hover {
    color: var(--orange-bright);
}

/* Comparison Table (Conversion Booster) */
.comparison-section {
    padding: 60px 0;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.comparison-section h2 {
    font-size: clamp(1.8rem, 4vw, 2.4rem);
    font-weight: 800;
    margin-bottom: 30px;
    letter-spacing: -0.5px;
}

.comparison-table-wrap {
    max-width: 900px;
    margin: 0 auto;
    overflow-x: auto;
}

.comp-table {
    width: 100%;
    border-collapse: collapse;
    text-align: left;
    font-size: 0.9rem;
}

.comp-table th, .comp-table td {
    padding: 16px 20px;
    border-bottom: 1px solid var(--border-color);
}

.comp-table th {
    font-weight: 700;
    color: var(--text-primary);
}

.comp-table td strong {
    color: var(--text-primary);
}

.comp-table tr:hover {
    background: rgba(255, 255, 255, 0.01);
}

body.light-theme .comp-table tr:hover {
    background: rgba(0, 0, 0, 0.01);
}

.comp-check {
    color: var(--signal-green);
    font-weight: 900;
}

.comp-cross {
    color: var(--risk-red);
    font-weight: 900;
}

/* Visual ROI Card */
.roi-value-card {
    max-width: 740px;
    margin: 40px auto 0;
    background: rgba(255, 122, 0, 0.03);
    border: 1px dashed var(--border-accent);
    border-radius: var(--border-radius-lg);
    padding: 24px;
    display: flex;
    align-items: center;
    gap: 20px;
    text-align: left;
}

body.light-theme .roi-value-card {
    background: rgba(255, 122, 0, 0.02);
}

.roi-icon {
    font-size: 2.2rem;
    flex-shrink: 0;
}

.roi-text h4 {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 6px;
    color: var(--text-primary);
}

.roi-text p {
    font-size: 0.88rem;
    color: var(--text-secondary);
    line-height: 1.4;
}

/* Feature Showcase Sections */
.features-section {
    padding: 60px 0;
    border-top: 1px solid var(--border-color);
}

.feature-block {
    display: grid;
    grid-template-columns: 1fr 1.1fr;
    gap: 60px;
    align-items: center;
    margin-bottom: 80px;
}

.feature-block:nth-child(even) {
    grid-template-columns: 1.1fr 1fr;
}

.feature-block:nth-child(even) .feature-text {
    order: 2;
}

.feature-block:nth-child(even) .feature-visual {
    order: 1;
}

.feature-block:last-child {
    margin-bottom: 0;
}

.feature-text {
    max-width: 500px;
}

.feature-badge-free {
    background: rgba(255, 255, 255, 0.05);
    color: var(--text-muted);
    border: 1px solid var(--border-color);
    padding: 3px 10px;
    font-family: var(--mono-font);
    font-size: 0.65rem;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: inline-block;
    margin-bottom: 12px;
}

body.light-theme .feature-badge-free {
    background: rgba(0,0,0,0.03);
}

.feature-badge-pro {
    background: rgba(255, 122, 0, 0.1);
    color: var(--orange-primary);
    border: 1px solid rgba(255, 122, 0, 0.25);
    padding: 3px 10px;
    font-family: var(--mono-font);
    font-size: 0.65rem;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    display: inline-block;
    margin-bottom: 12px;
}

.feature-text h2 {
    font-size: clamp(1.6rem, 3.5vw, 2.1rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 14px;
    letter-spacing: -0.5px;
}

.feature-text p {
    color: var(--text-secondary);
    font-size: 0.92rem;
    margin-bottom: 20px;
}

.feature-highlights {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.feature-highlights li {
    font-size: 0.85rem;
    color: var(--text-secondary);
    display: flex;
    gap: 8px;
    align-items: flex-start;
}

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

.feature-highlights li::before {
    content: "●";
    color: var(--orange-primary);
    font-size: 0.7rem;
    margin-top: 3px;
}

/* Feature Visual Screens */
.feature-visual {
    background: #0f1220;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 20px;
    box-shadow: var(--shadow-premium);
    overflow: hidden;
    position: relative;
    aspect-ratio: 16 / 10;
    display: flex;
    flex-direction: column;
}

body.light-theme .feature-visual {
    background: #ffffff;
}

.visual-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 12px;
    margin-bottom: 16px;
}

.visual-dots {
    display: flex;
    gap: 5px;
}

.visual-dots span {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: #ff5f56;
}

.visual-dots span:nth-child(2) { background: #ffbd2e; }
.visual-dots span:nth-child(3) { background: #27c93f; }

.visual-title {
    font-family: var(--mono-font);
    font-size: 0.7rem;
    color: var(--text-muted);
}

.visual-body {
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: center;
    font-size: 0.85rem;
    position: relative;
    overflow-y: auto;
}

/* AI Commenter visual styles */
.ai-comment-box {
    background: rgba(255, 122, 0, 0.04);
    border: 1px dashed var(--border-accent);
    border-radius: var(--border-radius-md);
    padding: 16px;
    position: relative;
}

body.light-theme .ai-comment-box {
    background: rgba(255, 122, 0, 0.02);
}

.ai-comment-badge {
    background: var(--orange-gradient);
    color: #060813;
    font-family: var(--mono-font);
    font-size: 0.65rem;
    font-weight: 800;
    padding: 2px 8px;
    border-radius: 4px;
    position: absolute;
    top: -10px;
    left: 16px;
}

.ai-comment-text {
    font-style: italic;
    color: var(--text-secondary);
    line-height: 1.5;
}

/* Simulated Stats Grid Dashboard (Nhật ký giao dịch) - Replicating image 2 values */
.nz-dashboard-wrap {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.nz-dashboard-row {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 8px;
}

.nz-dashboard-card {
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    border-radius: 6px;
    padding: 8px 10px;
    text-align: left;
}

body.light-theme .nz-dashboard-card {
    background: rgba(0, 0, 0, 0.01);
}

.nz-dashboard-card .lbl {
    font-size: 0.55rem;
    color: var(--text-muted);
    text-transform: uppercase;
    font-family: var(--sans-font);
    margin-bottom: 4px;
    letter-spacing: 0.2px;
}

.nz-dashboard-card .val {
    font-size: 0.95rem;
    font-weight: 800;
    font-family: var(--mono-font);
}

.nz-dashboard-card .val.gold { color: var(--orange-primary); }
.nz-dashboard-card .val.green { color: var(--signal-green); }

.nz-dashboard-pro-bar {
    border-top: 1px solid var(--border-color);
    padding-top: 8px;
    margin-top: 4px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.nz-pro-badge {
    background: rgba(255, 122, 0, 0.1);
    color: var(--orange-primary);
    border: 1px solid rgba(255, 122, 0, 0.25);
    font-size: 0.55rem;
    font-weight: bold;
    padding: 1px 6px;
    border-radius: 4px;
    font-family: var(--mono-font);
}

/* Simulated Feed Chat (Tin Tức Pro) - Replicating image 1 */
.nz-chat-wrap {
    background: #0f1220;
    border: 1px solid var(--border-color);
    border-radius: 12px;
    overflow: hidden;
    display: flex;
    flex-direction: column;
}

body.light-theme .nz-chat-wrap {
    background: #ffffff;
}

.nz-chat-header {
    background: rgba(255, 255, 255, 0.02);
    border-bottom: 1px solid var(--border-color);
    padding: 12px 16px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

body.light-theme .nz-chat-header {
    background: #f8fafc;
}

.nz-profile {
    display: flex;
    align-items: center;
    gap: 10px;
}

.nz-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--orange-primary);
    color: #fff;
    font-weight: bold;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.8rem;
    border: 1px solid var(--border-accent);
}

.nz-profile-info {
    display: flex;
    flex-direction: column;
}

.nz-profile-name {
    font-weight: 700;
    font-size: 0.85rem;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    gap: 4px;
}

.nz-check-icon {
    width: 14px;
    height: 14px;
    fill: #1877F2;
}

.nz-status {
    font-size: 0.65rem;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 5px;
}

.nz-status-dot {
    width: 6px;
    height: 6px;
    background: var(--signal-green);
    border-radius: 50%;
}

.nz-bullet-list {
    list-style: none;
    padding: 16px;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.nz-bullet-item {
    display: flex;
    gap: 12px;
    align-items: flex-start;
    font-size: 0.78rem;
    line-height: 1.45;
    color: var(--text-secondary);
}

.nz-bullet-num {
    width: 20px;
    height: 20px;
    background: rgba(255, 122, 0, 0.15);
    border: 1px solid var(--border-accent);
    color: var(--orange-primary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 0.7rem;
    flex-shrink: 0;
}

body.light-theme .nz-bullet-num {
    background: rgba(255, 122, 0, 0.08);
}

/* Minimalist Ticker and Chart Toolbar Style - Replicating image 2 */
.chart-toolbar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 8px;
    background: rgba(255, 255, 255, 0.02);
    border: 1px solid var(--border-color);
    padding: 8px 12px;
    border-radius: 8px;
    margin-bottom: 12px;
}

body.light-theme .chart-toolbar {
    background: #f8fafc;
}

.chart-input-box {
    display: flex;
    align-items: center;
    background: rgba(0, 0, 0, 0.2);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    overflow: hidden;
    padding-left: 6px;
}

body.light-theme .chart-input-box {
    background: #fff;
}

.chart-input-box input {
    background: none;
    border: none;
    color: #fff;
    font-size: 0.75rem;
    padding: 4px;
    width: 60px;
    outline: none;
}

body.light-theme .chart-input-box input {
    color: #0f172a;
}

.chart-input-btn {
    background: var(--orange-primary);
    color: #060813;
    font-size: 0.72rem;
    font-weight: 700;
    border: none;
    padding: 4px 10px;
    cursor: pointer;
}

.chart-toggles {
    display: flex;
    gap: 4px;
}

.chart-toggle-btn {
    background: rgba(255, 255, 255, 0.05);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-size: 0.7rem;
    padding: 3px 8px;
    border-radius: 4px;
    cursor: pointer;
}

body.light-theme .chart-toggle-btn {
    background: #fff;
}

.chart-toggle-btn.active {
    background: var(--orange-primary);
    color: #060813;
    border-color: var(--orange-primary);
    font-weight: 700;
}

.chart-info-bar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 8px;
}

.chart-ticker-meta {
    font-size: 0.88rem;
    font-weight: 800;
}

.chart-ticker-percentage {
    color: var(--signal-green);
    font-size: 0.78rem;
    font-weight: 700;
    margin-left: 6px;
}

/* FAQ Accordion Section */
.faq-section {
    padding: 60px 0;
    border-top: 1px solid var(--border-color);
}

.faq-list {
    max-width: 800px;
    margin: 40px auto 0;
    display: flex;
    flex-direction: column;
}

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

.faq-item:first-child {
    border-top: 1px solid var(--border-color);
}

.faq-question {
    padding: 20px 8px;
    font-weight: 600;
    font-size: 0.95rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
    user-select: none;
    transition: var(--transition-smooth);
}

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

.faq-question::after {
    content: "↓";
    font-size: 1.1rem;
    color: var(--text-muted);
    transition: transform 0.2s ease;
}

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

.faq-answer {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease-out, padding 0.3s ease;
    padding: 0 8px;
    color: var(--text-secondary);
    font-size: 0.88rem;
}

.faq-item.active .faq-answer {
    max-height: 200px;
    padding: 0 8px 20px;
}

/* Bottom CTA / Join Section */
.bottom-cta-section {
    padding: 80px 0;
    background: radial-gradient(circle at 50% 100%, rgba(255, 122, 0, 0.05) 0%, transparent 60%);
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.bottom-cta-section h2 {
    font-size: 2rem;
    font-weight: 800;
    margin-bottom: 30px;
    letter-spacing: -0.5px;
}

/* Footer style */
footer {
    background-color: #03050c;
    border-top: 1px solid var(--border-color);
    padding: 60px 0 30px;
    color: var(--text-muted);
    font-size: 0.8rem;
}

body.light-theme footer {
    background-color: #f1f5f9;
}

.footer-grid {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 40px;
}

.footer-brand {
    font-size: 1.2rem;
    font-weight: 900;
    color: var(--text-primary);
    text-decoration: none;
    margin-bottom: 12px;
    display: inline-block;
}

.footer-brand span {
    color: var(--orange-primary);
}

.footer-brand-about {
    max-width: 300px;
    line-height: 1.5;
}

.footer-col h4 {
    color: var(--text-primary);
    font-size: 0.85rem;
    margin-bottom: 16px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.footer-col ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.footer-col a {
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition-smooth);
}

.footer-col a:hover {
    color: var(--orange-primary);
}

.footer-bottom {
    border-top: 1px solid var(--border-color);
    padding-top: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 16px;
}

/* Zalo Floating Button */
.zalo-floating {
    position: fixed;
    right: 24px;
    bottom: 24px;
    z-index: 100;
    display: flex;
    align-items: center;
    gap: 8px;
    background: var(--orange-gradient);
    color: #060813;
    padding: 12px 20px;
    border-radius: 30px;
    font-weight: 700;
    font-size: 0.88rem;
    text-decoration: none;
    box-shadow: 0 10px 25px rgba(255, 122, 0, 0.4);
    transition: var(--transition-smooth);
}

.zalo-floating:hover {
    transform: translateY(-3px);
    box-shadow: 0 15px 30px rgba(255, 122, 0, 0.5);
    background: var(--orange-bright);
}

/* ==========================================
   RESPONSIVE DESIGN (Media Queries)
   ========================================== */

@media (max-width: 1024px) {
    .pricing-grid {
        grid-template-columns: 1fr;
        max-width: 480px;
        margin: 0 auto;
        gap: 30px;
    }
    
    .price-card.featured {
        transform: none;
    }
    
    .price-card.featured:hover {
        transform: translateY(-4px);
    }
    
    .feature-block {
        grid-template-columns: 1fr;
        gap: 30px;
        text-align: center;
    }
    
    .feature-block:nth-child(even) {
        grid-template-columns: 1fr;
    }
    
    .feature-block:nth-child(even) .feature-text {
        order: 1;
    }
    
    .feature-block:nth-child(even) .feature-visual {
        order: 2;
    }
    
    .feature-text {
        max-width: 100%;
    }
    
    .feature-highlights {
        align-items: center;
    }
}

@media (max-width: 640px) {
    .container {
        padding: 0 16px;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
        gap: 30px;
    }
    
    .footer-bottom {
        flex-direction: column;
        text-align: center;
    }
}