/* ============================================
   ONIQ Data Logger - Landing Page Styles
   Theme: Dark + Light mode support
   ============================================ */

/* --- CSS Variables --- */
:root {
    --color-primary: #E8921C;
    --color-primary-light: #F5A623;
    --color-primary-dark: #C47A15;
    --color-primary-glow: rgba(232, 146, 28, 0.15);
    --color-primary-glow-strong: rgba(232, 146, 28, 0.3);

    --color-bg: #0A0A0F;
    --color-bg-secondary: #111118;
    --color-bg-card: #16161F;
    --color-bg-card-hover: #1C1C28;
    --color-surface: #1E1E2A;

    --color-text: #E8E8ED;
    --color-text-secondary: #9898A6;
    --color-text-muted: #6B6B7B;

    --color-border: rgba(255, 255, 255, 0.08);
    --color-border-hover: rgba(232, 146, 28, 0.3);

    --color-success: #22C55E;

    --color-btn-text: #000;
    --color-navbar-scrolled: rgba(10, 10, 15, 0.9);
    --color-hero-grid: rgba(232, 146, 28, 0.03);
    --color-hero-glow: rgba(232, 146, 28, 0.08);
    --color-overlay: rgba(0, 0, 0, 0.5);
    --color-floating-tag-bg: rgba(22, 22, 31, 0.9);

    --font-main: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;

    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 16px;
    --radius-xl: 24px;

    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.3);
    --shadow-glow: 0 0 40px rgba(232, 146, 28, 0.1);

    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

/* --- Light Theme --- */
[data-theme="light"] {
    --color-primary: #D4820F;
    --color-primary-light: #E8921C;
    --color-primary-dark: #B06D0A;
    --color-primary-glow: rgba(212, 130, 15, 0.1);
    --color-primary-glow-strong: rgba(212, 130, 15, 0.18);

    --color-bg: #FFFFFF;
    --color-bg-secondary: #F5F5F7;
    --color-bg-card: #FFFFFF;
    --color-bg-card-hover: #F9F9FB;
    --color-surface: #F0F0F4;

    --color-text: #1A1A2E;
    --color-text-secondary: #5A5A6E;
    --color-text-muted: #8A8A9A;

    --color-border: rgba(0, 0, 0, 0.08);
    --color-border-hover: rgba(212, 130, 15, 0.35);

    --color-btn-text: #FFFFFF;
    --color-navbar-scrolled: rgba(255, 255, 255, 0.9);
    --color-hero-grid: rgba(212, 130, 15, 0.05);
    --color-hero-glow: rgba(212, 130, 15, 0.06);
    --color-overlay: rgba(255, 255, 255, 0.6);
    --color-floating-tag-bg: rgba(255, 255, 255, 0.9);

    --shadow-card: 0 4px 24px rgba(0, 0, 0, 0.08);
    --shadow-glow: 0 0 40px rgba(212, 130, 15, 0.08);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    font-family: var(--font-main);
    background: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

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

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

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

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

/* --- Animations --- */
@keyframes fadeUp {
    from { opacity: 0; transform: translateY(30px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes fadeLeft {
    from { opacity: 0; transform: translateX(40px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes fadeRight {
    from { opacity: 0; transform: translateX(-40px); }
    to { opacity: 1; transform: translateX(0); }
}

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

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

@keyframes ringPulse {
    0% { transform: scale(0.8); opacity: 0.6; }
    50% { transform: scale(1.1); opacity: 0.2; }
    100% { transform: scale(0.8); opacity: 0.6; }
}

@keyframes scrollDown {
    0% { transform: translateY(0); opacity: 0; }
    30% { opacity: 1; }
    60% { opacity: 1; }
    100% { transform: translateY(20px); opacity: 0; }
}

[data-animate] {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

[data-animate].visible {
    opacity: 1;
    transform: translateY(0);
}

[data-animate="fade-left"].visible {
    transform: translateX(0);
}

[data-animate="fade-right"].visible {
    transform: translateX(0);
}

[data-animate="fade-left"] {
    transform: translateX(40px);
}

[data-animate="fade-right"] {
    transform: translateX(-40px);
}

/* --- Navigation --- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 16px 0;
    transition: var(--transition);
    background: transparent;
}

.navbar.scrolled {
    background: var(--color-navbar-scrolled);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    padding: 10px 0;
}

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

.nav-logo {
    display: flex;
    align-items: center;
    gap: 10px;
}

.logo-img {
    height: 40px;
    width: auto;
}

.logo-light {
    display: none;
}

[data-theme="light"] .logo-dark {
    display: none;
}

[data-theme="light"] .logo-light {
    display: block;
}

.logo-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}

.logo-brand {
    font-size: 20px;
    font-weight: 700;
    color: var(--color-text);
    letter-spacing: 1px;
}

.logo-sub {
    font-size: 10px;
    color: var(--color-text-muted);
    letter-spacing: 3px;
    text-transform: uppercase;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 32px;
    list-style: none;
}

.nav-links a {
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
    position: relative;
}

.nav-links a:not(.nav-cta):hover {
    color: var(--color-text);
}

.nav-links a:not(.nav-cta)::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-primary);
    transition: var(--transition);
}

.nav-links a:not(.nav-cta):hover::after {
    width: 100%;
}

.nav-cta {
    background: var(--color-primary);
    color: var(--color-btn-text) !important;
    padding: 10px 24px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    font-size: 14px;
}

.nav-cta:hover {
    background: var(--color-primary-light);
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(232, 146, 28, 0.4);
}

/* --- Nav Actions (theme toggle + hamburger) --- */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 12px;
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text);
    transition: var(--transition);
    border-radius: 2px;
}

/* --- Theme Toggle --- */
.theme-toggle {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 38px;
    height: 38px;
    border-radius: 50%;
    background: transparent;
    border: 1px solid var(--color-border);
    cursor: pointer;
    transition: var(--transition);
    color: var(--color-text-secondary);
    flex-shrink: 0;
}

.theme-toggle:hover {
    color: var(--color-text);
    background: var(--color-bg-card);
    border-color: var(--color-border-hover);
    transform: rotate(15deg);
}

.theme-toggle svg {
    width: 18px;
    height: 18px;
    transition: var(--transition);
}

.theme-toggle .icon-sun {
    display: none;
}

[data-theme="light"] .theme-toggle .icon-moon {
    display: none;
}

[data-theme="light"] .theme-toggle .icon-sun {
    display: block;
}

/* --- Theme Transition --- */
body.theme-transitioning,
body.theme-transitioning *,
body.theme-transitioning *::before,
body.theme-transitioning *::after {
    transition: background-color 0.4s ease, color 0.4s ease, border-color 0.4s ease, box-shadow 0.4s ease !important;
}

/* --- Light mode special overrides --- */
[data-theme="light"] .hero-bg-grid {
    opacity: 0.7;
}

[data-theme="light"] .hero-glow {
    opacity: 0.5;
}

[data-theme="light"] .navbar.scrolled {
    box-shadow: 0 1px 8px rgba(0, 0, 0, 0.06);
}

[data-theme="light"] .feature-card,
[data-theme="light"] .module-card,
[data-theme="light"] .spec-tab-content,
[data-theme="light"] .pain-item,
[data-theme="light"] .usecase-card,
[data-theme="light"] .trust-item,
[data-theme="light"] .cta-banner-content {
    border: 1px solid var(--color-border);
    box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
}

[data-theme="light"] .nav-cta:hover {
    box-shadow: 0 4px 20px rgba(212, 130, 15, 0.3);
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: var(--radius-sm);
    font-size: 15px;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    position: relative;
    overflow: hidden;
}

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

.btn-primary:hover {
    background: var(--color-primary-light);
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(232, 146, 28, 0.4);
}

.btn-outline {
    background: transparent;
    color: var(--color-text);
    border: 1px solid var(--color-border);
}

.btn-outline:hover {
    border-color: var(--color-primary);
    color: var(--color-primary);
    background: var(--color-primary-glow);
}

.btn-full {
    width: 100%;
    justify-content: center;
}

/* --- Hero Section --- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding: 120px 0 80px;
    overflow: hidden;
}

.hero-bg-grid {
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(var(--color-hero-grid) 1px, transparent 1px),
        linear-gradient(90deg, var(--color-hero-grid) 1px, transparent 1px);
    background-size: 60px 60px;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 20%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse 80% 60% at 50% 40%, black 20%, transparent 70%);
}

.hero-glow {
    position: absolute;
    top: 20%;
    right: 20%;
    width: 500px;
    height: 500px;
    background: radial-gradient(circle, var(--color-hero-glow) 0%, transparent 70%);
    pointer-events: none;
}

.hero-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: var(--color-primary-glow);
    border: 1px solid rgba(232, 146, 28, 0.2);
    border-radius: 100px;
    font-size: 13px;
    font-weight: 500;
    color: var(--color-primary);
    margin-bottom: 24px;
}

.badge-dot {
    width: 8px;
    height: 8px;
    background: var(--color-primary);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

.hero-title {
    font-size: clamp(48px, 6vw, 72px);
    font-weight: 900;
    line-height: 1.05;
    margin-bottom: 20px;
}

.title-line {
    display: block;
    letter-spacing: 4px;
}

.title-highlight {
    display: block;
    background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-desc {
    font-size: 17px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin-bottom: 32px;
    max-width: 480px;
}

.hero-stats {
    display: flex;
    gap: 32px;
    margin-bottom: 40px;
    padding: 24px 0;
    border-top: 1px solid var(--color-border);
    border-bottom: 1px solid var(--color-border);
}

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

.stat-number {
    display: block;
    font-size: 28px;
    font-weight: 800;
    color: var(--color-primary);
    line-height: 1.2;
}

.stat-label {
    font-size: 12px;
    color: var(--color-text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-top: 4px;
}

.hero-actions {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* Product Showcase */
.product-showcase {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    aspect-ratio: 1;
}

.showcase-ring {
    position: absolute;
    border-radius: 50%;
    border: 1px solid rgba(232, 146, 28, 0.1);
}

.ring-1 {
    width: 70%;
    height: 70%;
    animation: ringPulse 4s ease-in-out infinite;
}

.ring-2 {
    width: 85%;
    height: 85%;
    animation: ringPulse 4s ease-in-out infinite 1s;
}

.ring-3 {
    width: 100%;
    height: 100%;
    animation: ringPulse 4s ease-in-out infinite 2s;
}

.product-image-wrapper {
    position: relative;
    z-index: 2;
    width: 75%;
    animation: float 6s ease-in-out infinite;
}

.product-main-img {
    width: 100%;
    height: auto;
    filter: drop-shadow(0 20px 40px rgba(0, 0, 0, 0.4));
}

.floating-tag {
    position: absolute;
    z-index: 3;
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 8px 14px;
    background: var(--color-floating-tag-bg);
    backdrop-filter: blur(10px);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 12px;
    font-weight: 500;
    color: var(--color-text);
    white-space: nowrap;
    animation: float 5s ease-in-out infinite;
}

.floating-tag svg {
    color: var(--color-primary);
}

.tag-wifi {
    top: 15%;
    right: -5%;
    animation-delay: 0s;
}

.tag-modbus {
    bottom: 25%;
    left: -5%;
    animation-delay: 1.5s;
}

.tag-ip65 {
    bottom: 10%;
    right: 5%;
    animation-delay: 3s;
}

/* Scroll Indicator */
.hero-scroll-indicator {
    position: absolute;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--color-primary), transparent);
    position: relative;
    overflow: hidden;
}

.scroll-line::after {
    content: '';
    position: absolute;
    top: -10px;
    left: 0;
    width: 100%;
    height: 10px;
    background: var(--color-primary);
    animation: scrollDown 2s ease-in-out infinite;
}

.hero-scroll-indicator span {
    font-size: 11px;
    color: var(--color-text-muted);
    letter-spacing: 2px;
    text-transform: uppercase;
}

/* --- Section Shared --- */
.section-header {
    text-align: center;
    margin-bottom: 60px;
}

.section-tag {
    display: inline-block;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 3px;
    margin-bottom: 12px;
}

.section-title {
    font-size: clamp(28px, 4vw, 40px);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 12px;
}

.section-desc {
    font-size: 16px;
    color: var(--color-text-secondary);
    max-width: 560px;
    margin: 0 auto;
}

/* --- Pain Points Section --- */
.painpoints {
    padding: 80px 0;
    background: var(--color-bg);
}

.painpoints-layout {
    display: grid;
    grid-template-columns: 4fr 6fr;
    gap: 60px;
    align-items: center;
}

.painpoints-visual {
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
}

.painpoints-img {
    width: 100%;
    max-width: 460px;
    border-radius: var(--radius-xl);
    object-fit: cover;
}

.painpoints-content .section-tag {
    display: inline-block;
    margin-bottom: 12px;
}

.painpoints-title {
    text-align: left;
    margin-bottom: 36px;
}

.painpoints-list {
    display: flex;
    flex-direction: column;
    gap: 24px;
}

.pain-item {
    display: flex;
    gap: 20px;
    padding: 24px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    transition: var(--transition);
}

.pain-item:hover {
    border-color: #ef4444;
    box-shadow: 0 4px 20px rgba(239, 68, 68, 0.08);
}

.pain-number {
    font-size: 28px;
    font-weight: 900;
    color: #ef4444;
    opacity: 0.3;
    line-height: 1;
    flex-shrink: 0;
    min-width: 36px;
}

.pain-body h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 6px;
}

.pain-body p {
    font-size: 14px;
    line-height: 1.7;
    color: var(--color-text-secondary);
}

/* --- Features Section --- */
.features {
    padding: 100px 0;
    background: var(--color-bg-secondary);
    position: relative;
}

.features::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
    opacity: 0.3;
}

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

.feature-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.feature-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
    opacity: 0;
    transition: var(--transition);
}

.feature-card:hover {
    transform: translateY(-4px);
    border-color: var(--color-border-hover);
    background: var(--color-bg-card-hover);
    box-shadow: var(--shadow-glow);
}

.feature-card:hover::before {
    opacity: 1;
}

.feature-icon {
    width: 48px;
    height: 48px;
    color: var(--color-primary);
    margin-bottom: 20px;
}

.feature-icon svg {
    width: 100%;
    height: 100%;
}

.feature-card h3 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 10px;
}

.feature-card p {
    font-size: 14px;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
}

.feature-highlight {
    display: inline-block;
    padding: 4px 12px;
    background: var(--color-primary-glow);
    border: 1px solid rgba(232, 146, 28, 0.15);
    border-radius: 100px;
    font-size: 12px;
    font-weight: 600;
    color: var(--color-primary);
}

/* --- Specs Section --- */
.specs {
    padding: 100px 0;
    position: relative;
}

.specs-layout {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 40px;
}

.specs-tabs {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.spec-tab {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 14px 20px;
    border-radius: var(--radius-md);
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
    text-align: left;
    transition: var(--transition);
    border: 1px solid transparent;
}

.spec-tab:hover {
    background: var(--color-bg-card);
    color: var(--color-text);
}

.spec-tab.active {
    background: var(--color-primary-glow);
    border-color: rgba(232, 146, 28, 0.2);
    color: var(--color-primary);
}

.spec-tab svg {
    flex-shrink: 0;
}

.specs-content {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.spec-panel {
    display: none;
}

.spec-panel.active {
    display: block;
    animation: fadeUp 0.4s ease;
}

.spec-row {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    padding: 16px 0;
    border-bottom: 1px solid var(--color-border);
    gap: 20px;
}

.spec-row:last-child {
    border-bottom: none;
}

.spec-label {
    font-size: 14px;
    color: var(--color-text-muted);
    font-weight: 500;
    min-width: 160px;
    flex-shrink: 0;
}

.spec-value {
    font-size: 14px;
    color: var(--color-text);
    font-weight: 500;
    text-align: right;
}

/* --- Modules Section --- */
.modules {
    padding: 100px 0;
    background: var(--color-bg-secondary);
    position: relative;
}

.modules::before {
    content: '';
    position: absolute;
    top: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 600px;
    height: 1px;
    background: linear-gradient(90deg, transparent, var(--color-primary), transparent);
    opacity: 0.3;
}

.modules-grid {
    display: grid;
    grid-template-columns: repeat(5, 1fr);
    gap: 20px;
}

.module-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 28px 20px;
    text-align: center;
    transition: var(--transition);
    position: relative;
}

.module-card:hover {
    transform: translateY(-6px);
    border-color: var(--color-border-hover);
    box-shadow: var(--shadow-glow);
}

.module-icon {
    width: 48px;
    height: 48px;
    color: var(--color-primary);
    margin: 0 auto 16px;
}

.module-icon svg {
    width: 100%;
    height: 100%;
}

.module-id {
    font-size: 11px;
    color: var(--color-text-muted);
    font-weight: 600;
    letter-spacing: 1px;
    margin-bottom: 8px;
}

.module-card h3 {
    font-size: 15px;
    font-weight: 700;
    margin-bottom: 8px;
}

.module-card p {
    font-size: 13px;
    color: var(--color-text-secondary);
    line-height: 1.5;
}

/* --- Use Cases Section --- */
.usecases {
    padding: 100px 0;
    background: var(--color-bg);
}

.usecases-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 48px;
}

.usecase-card {
    padding: 32px 24px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    transition: var(--transition);
    text-align: center;
}

.usecase-card:hover {
    border-color: var(--color-border-hover);
    transform: translateY(-4px);
    box-shadow: var(--shadow-glow);
}

.usecase-icon {
    width: 56px;
    height: 56px;
    margin: 0 auto 20px;
    color: var(--color-primary);
}

.usecase-card h3 {
    font-size: 16px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 12px;
}

.usecase-card p {
    font-size: 13px;
    line-height: 1.7;
    color: var(--color-text-secondary);
}

/* --- CTA Banner --- */
.cta-banner {
    padding: 60px 0;
    background: var(--color-bg-secondary);
}

.cta-banner-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    padding: 48px 56px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    box-shadow: var(--shadow-card);
}

.cta-banner-text h2 {
    font-size: 24px;
    font-weight: 700;
    color: var(--color-text);
    margin-bottom: 8px;
}

.cta-banner-text p {
    font-size: 15px;
    color: var(--color-text-secondary);
}

.cta-banner-actions {
    display: flex;
    gap: 12px;
    flex-shrink: 0;
}

/* --- 3D Viewer Section --- */
.viewer-section {
    padding: 100px 0;
}

.viewer-wrapper {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.viewer-canvas {
    position: relative;
    width: 100%;
    height: 600px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    cursor: grab;
}

.viewer-canvas:active {
    cursor: grabbing;
}

.viewer-canvas canvas {
    display: block;
    width: 100% !important;
    height: 100% !important;
}

/* Loading state */
.viewer-loading {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-card);
    z-index: 10;
    transition: opacity 0.5s ease;
}

.viewer-loading.hidden {
    opacity: 0;
    pointer-events: none;
}

.viewer-loading-content {
    text-align: center;
}

.viewer-loading-content p {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-top: 16px;
}

.viewer-spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--color-border);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    margin: 0 auto;
    animation: spin 0.8s linear infinite;
}

.viewer-progress {
    width: 200px;
    height: 3px;
    background: var(--color-border);
    border-radius: 3px;
    margin: 12px auto 0;
    overflow: hidden;
}

.viewer-progress-fill {
    width: 0%;
    height: 100%;
    background: var(--color-primary);
    border-radius: 3px;
    transition: width 0.3s ease;
}

/* Hint overlay */
.viewer-hint {
    position: absolute;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(10px);
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: var(--color-overlay);
    backdrop-filter: blur(10px);
    border: 1px solid var(--color-border);
    border-radius: 100px;
    font-size: 13px;
    color: var(--color-text-secondary);
    opacity: 0;
    transition: opacity 0.5s ease, transform 0.5s ease;
    pointer-events: none;
    white-space: nowrap;
    z-index: 5;
}

.viewer-hint svg {
    color: var(--color-primary);
    flex-shrink: 0;
}

.viewer-hint.visible {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* Error state */
.viewer-error {
    text-align: center;
    color: var(--color-text-muted);
}

.viewer-error p {
    font-size: 14px;
}

/* Control buttons */
.viewer-controls {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex-wrap: wrap;
}

.viewer-btn {
    display: flex;
    align-items: center;
    gap: 6px;
    padding: 10px 16px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    font-size: 13px;
    font-weight: 500;
    color: var(--color-text-secondary);
    transition: var(--transition);
    cursor: pointer;
}

.viewer-btn:hover {
    background: var(--color-bg-card-hover);
    border-color: var(--color-text-muted);
    color: var(--color-text);
}

.viewer-btn.active {
    background: var(--color-primary-glow);
    border-color: rgba(232, 146, 28, 0.3);
    color: var(--color-primary);
}

.viewer-btn svg {
    flex-shrink: 0;
}

.viewer-divider {
    width: 1px;
    height: 24px;
    background: var(--color-border);
    margin: 0 4px;
}

/* --- Trust Section --- */
.trust {
    padding: 80px 0;
    background: var(--color-bg-secondary);
}

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

.trust-item {
    text-align: center;
    padding: 32px 16px;
    border-radius: var(--radius-lg);
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
}

.trust-number {
    font-size: 42px;
    font-weight: 900;
    color: var(--color-primary);
    line-height: 1;
    margin-bottom: 8px;
}

.trust-label {
    font-size: 14px;
    color: var(--color-text-secondary);
}

.trust-commitments {
    display: flex;
    justify-content: center;
    flex-wrap: wrap;
    gap: 24px 40px;
    margin-top: 40px;
    padding-top: 40px;
    border-top: 1px solid var(--color-border);
}

.commitment-item {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 14px;
    font-weight: 500;
    color: var(--color-text-secondary);
}

.commitment-item svg {
    color: var(--color-primary);
    flex-shrink: 0;
}

/* --- Contact Section --- */
.contact {
    padding: 100px 0;
}

.contact-layout {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.contact-desc {
    font-size: 16px;
    color: var(--color-text-secondary);
    line-height: 1.7;
    margin: 16px 0 32px;
}

.contact-benefits {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.benefit-item {
    display: flex;
    align-items: center;
    gap: 12px;
    font-size: 15px;
    color: var(--color-text);
}

.benefit-item svg {
    color: var(--color-success);
    flex-shrink: 0;
}

/* Contact Form */
.contact-form-wrapper {
    position: relative;
}

.contact-form {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
    padding: 40px;
}

.contact-form h3 {
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 24px;
}

.form-group {
    margin-bottom: 18px;
}

.form-group label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--color-text-secondary);
    margin-bottom: 6px;
}

.required {
    color: var(--color-primary);
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px 16px;
    background: var(--color-surface);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    color: var(--color-text);
    font-size: 14px;
    font-family: var(--font-main);
    transition: var(--transition);
    outline: none;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--color-text-muted);
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-glow);
}

.form-group select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 24 24' fill='none' stroke='%239898A6' stroke-width='2'%3E%3Cpath d='M6 9l6 6 6-6'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 14px center;
    padding-right: 36px;
}

.form-group select option {
    background: var(--color-bg-card);
    color: var(--color-text);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.contact-form .btn {
    margin-top: 8px;
    font-size: 16px;
    padding: 16px 32px;
}

.form-note {
    font-size: 12px;
    color: var(--color-text-muted);
    text-align: center;
    margin-top: 12px;
}

/* Form Error & Validation */
.form-error {
    background: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.3);
    color: #ef4444;
    padding: 10px 16px;
    border-radius: var(--radius-sm);
    font-size: 13px;
    margin-bottom: 12px;
    text-align: center;
}

.form-group input.shake,
.form-group select.shake {
    border-color: #ef4444;
    animation: shakeAnim 0.4s ease;
}

@keyframes shakeAnim {
    0%, 100% { transform: translateX(0); }
    20% { transform: translateX(-6px); }
    40% { transform: translateX(6px); }
    60% { transform: translateX(-4px); }
    80% { transform: translateX(4px); }
}

/* Loading spinner */
.spinner {
    display: inline-block;
    width: 18px;
    height: 18px;
    border: 2px solid rgba(0, 0, 0, 0.2);
    border-top-color: var(--color-btn-text);
    border-radius: 50%;
    animation: spin 0.6s linear infinite;
}

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

/* Form Success State */
.form-success {
    display: none;
    text-align: center;
    padding: 60px 40px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
}

.form-success.show {
    display: block;
    animation: fadeUp 0.5s ease;
}

.form-success .success-icon {
    color: var(--color-success);
    margin-bottom: 16px;
}

.form-success h3 {
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 8px;
}

.form-success p {
    color: var(--color-text-secondary);
    font-size: 15px;
}

/* --- Contact Direct Info --- */
.contact-direct {
    margin-top: 32px;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
}

.contact-direct-label {
    font-size: 13px;
    color: var(--color-text-muted);
    margin-bottom: 12px;
}

.contact-phone,
.contact-email {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 15px;
    font-weight: 600;
    color: var(--color-text);
    margin-bottom: 8px;
}

.contact-phone svg,
.contact-email svg {
    color: var(--color-primary);
    flex-shrink: 0;
}

.contact-phone:hover,
.contact-email:hover {
    color: var(--color-primary);
}

/* --- Floating Zalo Button --- */
.floating-zalo {
    position: fixed;
    bottom: 100px;
    right: 24px;
    z-index: 999;
    width: 56px;
    height: 56px;
    background: #0068FF;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 20px rgba(0, 104, 255, 0.4);
    transition: var(--transition);
}

.floating-zalo:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 28px rgba(0, 104, 255, 0.5);
}

.zalo-pulse {
    position: absolute;
    inset: -4px;
    border-radius: 50%;
    border: 2px solid #0068FF;
    animation: zaloPulse 2s ease-out infinite;
}

@keyframes zaloPulse {
    0% { transform: scale(1); opacity: 0.6; }
    100% { transform: scale(1.4); opacity: 0; }
}

/* --- Sticky Mobile CTA Bar --- */
.sticky-cta-bar {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 998;
    background: var(--color-bg);
    border-top: 1px solid var(--color-border);
    padding: 10px 16px;
    gap: 10px;
    box-shadow: 0 -4px 20px rgba(0, 0, 0, 0.1);
    display: none;
    transform: translateY(100%);
    transition: transform 0.3s ease;
}

.sticky-cta-bar.visible {
    transform: translateY(0);
}

.sticky-cta-phone {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    flex: 1;
    padding: 12px;
    border-radius: var(--radius-sm);
    border: 1px solid var(--color-border);
    font-size: 14px;
    font-weight: 600;
    color: var(--color-text);
    background: var(--color-bg-card);
}

.sticky-cta-form {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    flex: 2;
    padding: 12px;
    border-radius: var(--radius-sm);
    font-size: 14px;
    font-weight: 600;
    color: var(--color-btn-text);
    background: var(--color-primary);
}

.sticky-cta-form:hover {
    background: var(--color-primary-light);
}

/* --- Footer --- */
.footer {
    padding: 60px 0 0;
    padding: 60px 0 0;
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
}

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

.footer-brand p {
    font-size: 14px;
    color: var(--color-text-secondary);
    margin-top: 16px;
    max-width: 300px;
}

.footer-links {
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links h4 {
    font-size: 14px;
    font-weight: 700;
    margin-bottom: 4px;
    color: var(--color-text);
}

.footer-links a {
    font-size: 14px;
    color: var(--color-text-secondary);
}

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

.footer-bottom {
    padding: 20px 0;
    border-top: 1px solid var(--color-border);
}

.footer-bottom p {
    font-size: 13px;
    color: var(--color-text-muted);
    text-align: center;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .hero-container {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }

    .hero-desc {
        margin: 0 auto 32px;
    }

    .hero-stats {
        justify-content: center;
    }

    .hero-actions {
        justify-content: center;
    }

    .hero-visual {
        max-width: 500px;
        margin: 0 auto;
    }

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

    .specs-layout {
        grid-template-columns: 1fr;
    }

    .specs-tabs {
        flex-direction: row;
        overflow-x: auto;
        padding-bottom: 8px;
    }

    .spec-tab {
        white-space: nowrap;
        flex-shrink: 0;
    }

    .painpoints-layout {
        gap: 40px;
    }

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

    .cta-banner-content {
        flex-direction: column;
        text-align: center;
        padding: 40px 32px;
    }

    .cta-banner-actions {
        justify-content: center;
    }

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

    .contact-layout {
        grid-template-columns: 1fr;
        gap: 40px;
    }

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

@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--color-navbar-scrolled);
        backdrop-filter: blur(20px);
        padding: 24px;
        gap: 16px;
        border-bottom: 1px solid var(--color-border);
    }

    .nav-links.open {
        display: flex;
    }

    .theme-toggle {
        width: 34px;
        height: 34px;
    }

    .theme-toggle svg {
        width: 16px;
        height: 16px;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero {
        padding: 100px 0 60px;
    }

    .hero-stats {
        flex-wrap: wrap;
        gap: 20px;
    }

    .stat-item {
        min-width: calc(50% - 20px);
    }

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

    .painpoints-visual {
        max-width: 360px;
        margin: 0 auto;
    }

    .painpoints-title {
        text-align: center;
    }

    .painpoints-content .section-tag {
        text-align: center;
        display: block;
    }

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

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

    .cta-banner-content {
        padding: 32px 24px;
    }

    .cta-banner-actions {
        flex-direction: column;
        width: 100%;
    }

    .cta-banner-actions .btn {
        width: 100%;
        justify-content: center;
    }

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

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

    .trust-commitments {
        flex-direction: column;
        align-items: center;
        gap: 16px;
    }

    .form-row {
        grid-template-columns: 1fr;
    }

    .viewer-canvas {
        height: 400px;
    }

    .viewer-btn span {
        display: none;
    }

    .viewer-btn {
        padding: 10px 12px;
    }

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

    /* Show sticky CTA bar on mobile */
    .sticky-cta-bar {
        display: flex;
    }

    .floating-zalo {
        bottom: 80px;
    }

    .footer {
        padding-bottom: 70px;
    }
}

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

    .hero-title {
        font-size: 36px;
    }

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

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

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

    .contact-form {
        padding: 24px;
    }

    .floating-tag {
        display: none;
    }
}