/* 
   TNT High-Tech Education Joint Stock Company
   Core Stylesheet & Design System
*/

@import url('https://fonts.googleapis.com/css2?family=Nunito:wght@300;400;500;600;700;800;900&display=swap');

/* CSS Variables for Theme Support (Default to Dark Theme based on brand blue/orange) */
:root {
    --font-heading: 'SF Pro Rounded', 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    --font-body: 'SF Pro Rounded', 'Nunito', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    
    /* Dark Theme Variables (Optimized for Logo Deep Navy #0f4c81 and Warm Orange #f7931e) */
    --bg-primary: #0a0e1a;
    --bg-secondary: #111827;
    --bg-tertiary: #1f2937;
    --primary: #1e70b3; /* Vibrant blue for contrast */
    --primary-glow: rgba(30, 112, 179, 0.15);
    --secondary: #f7931e; /* Brand Orange */
    --accent: #f9a03f; /* Light Orange */
    --accent-glow: rgba(247, 147, 30, 0.15);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border-color: rgba(255, 255, 255, 0.08);
    --card-bg: rgba(17, 24, 39, 0.6);
    --glass-bg: rgba(10, 14, 26, 0.85);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.5);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.6);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.7);
    --gradient-primary: linear-gradient(135deg, #0f4c81 0%, #f7931e 100%);
    --gradient-accent: linear-gradient(135deg, #f7931e 0%, #f9a03f 100%);
    --gradient-dark: linear-gradient(180deg, #0a0e1a 0%, #111827 100%);
    --transition-speed: 0.3s;
    --border-radius-sm: 8px;
    --border-radius-md: 16px;
    --border-radius-lg: 24px;
}

/* Light Theme Variables */
body.light-theme {
    --bg-primary: #f3f4f6;
    --bg-secondary: #ffffff;
    --bg-tertiary: #e5e7eb;
    --primary: #0f4c81; /* Brand Navy Blue */
    --primary-glow: rgba(15, 76, 129, 0.1);
    --secondary: #e67e22; /* Darker orange for better contrast */
    --accent: #d35400;
    --accent-glow: rgba(230, 126, 34, 0.1);
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #64748b;
    --border-color: rgba(0, 0, 0, 0.08);
    --card-bg: rgba(255, 255, 255, 0.8);
    --glass-bg: rgba(243, 244, 246, 0.8);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.05);
    --shadow-md: 0 8px 30px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 16px 40px rgba(0, 0, 0, 0.12);
    --gradient-primary: linear-gradient(135deg, #0f4c81 0%, #e67e22 100%);
    --gradient-accent: linear-gradient(135deg, #e67e22 0%, #d35400 100%);
    --gradient-dark: linear-gradient(180deg, #f3f4f6 0%, #ffffff 100%);
}

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

body {
    font-family: var(--font-body);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    letter-spacing: -0.02em;
    color: var(--text-primary);
}

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

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

/* Container */
.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* Glassmorphism base helper */
.glass-panel {
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    box-shadow: var(--shadow-md);
    border-radius: var(--border-radius-md);
    transition: transform var(--transition-speed), border-color var(--transition-speed), box-shadow var(--transition-speed);
}

/* Navigation Bar */
.header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    transition: background-color var(--transition-speed), box-shadow var(--transition-speed), padding var(--transition-speed);
    padding: 1.5rem 0;
}

.header.scrolled {
    background-color: var(--glass-bg);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 1rem 0;
    box-shadow: var(--shadow-sm);
    border-bottom: 1px solid var(--border-color);
}

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

.logo {
    display: flex;
    align-items: center;
}

.logo img {
    height: 45px;
    width: auto;
    object-fit: contain;
    transition: transform var(--transition-speed);
}

.logo:hover img {
    transform: scale(1.03);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 2rem;
    list-style: none;
}

.nav-link {
    font-size: 0.95rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    padding: 0.5rem 0;
}

.nav-link:hover, .nav-link.active {
    color: var(--text-primary);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition-speed);
}

.nav-link:hover::after, .nav-link.active::after {
    width: 100%;
}

/* Dropdown Menu Styles */
.nav-dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    cursor: pointer;
}

.dropdown-toggle svg {
    transition: transform var(--transition-speed);
}

.dropdown {
    position: relative;
    display: inline-block;
}

.dropdown-toggle {
    display: inline-flex;
    align-items: center;
    gap: 0.25rem;
    cursor: pointer;
}

.dropdown-toggle svg {
    transition: transform var(--transition-speed);
}

.dropdown:hover .dropdown-toggle svg {
    transform: rotate(180deg);
}

.dropdown-menu {
    position: absolute;
    top: 100%;
    left: 0;
    z-index: 1000;
    opacity: 0;
    visibility: hidden;
    min-width: 240px;
    padding: 0.5rem 0;
    margin-top: 0.25rem;
    list-style: none;
    background: var(--card-bg);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-md);
    box-shadow: var(--shadow-md);
    transform: translateY(10px);
    transition: transform var(--transition-speed), opacity var(--transition-speed), visibility var(--transition-speed);
}

/* Cầu nối hover để giữ menu không bị đóng */
.dropdown-menu::before {
    content: '';
    position: absolute;
    top: -15px;
    left: 0;
    width: 100%;
    height: 15px;
    background: transparent;
}

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

.dropdown-item {
    display: block;
    width: 100%;
    padding: 0.6rem 1.5rem;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    text-decoration: none;
    background-color: transparent;
    border: 0;
    transition: all var(--transition-speed);
}

.dropdown-item:hover, .dropdown-item.active {
    background-color: var(--border-color);
    color: var(--text-primary);
    padding-left: 1.75rem;
}

@keyframes dropdownFadeIn {
    from { opacity: 0; transform: translateY(5px); }
    to { opacity: 1; transform: translateY(0); }
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 1.5rem;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-family: var(--font-body);
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--border-radius-sm);
    border: none;
    cursor: pointer;
    transition: transform 0.2s, box-shadow 0.2s, background-color var(--transition-speed);
}

.btn:active {
    transform: scale(0.98);
}

.btn-primary {
    background: var(--gradient-primary);
    color: #ffffff;
    box-shadow: 0 4px 15px var(--primary-glow);
}

.btn-primary:hover {
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.4);
    transform: translateY(-2px);
}

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

.btn-secondary:hover {
    background: var(--border-color);
    transform: translateY(-2px);
}

.theme-toggle-btn {
    background: transparent;
    border: 1px solid var(--border-color);
    width: 40px;
    height: 40px;
    border-radius: 50%;
    color: var(--text-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: background-color var(--transition-speed);
}

.theme-toggle-btn:hover {
    background: var(--border-color);
}

/* Mobile Menu Button */
.mobile-nav-toggle {
    display: none;
    background: transparent;
    border: none;
    color: var(--text-primary);
    cursor: pointer;
    font-size: 1.5rem;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    position: relative;
    padding-top: 100px;
    padding-bottom: 50px;
    background-image: radial-gradient(circle at 10% 20%, rgba(99, 102, 241, 0.08) 0%, transparent 40%),
                      radial-gradient(circle at 90% 80%, rgba(168, 85, 247, 0.08) 0%, transparent 40%);
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 4rem;
    align-items: center;
}

.hero-content {
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.tagline {
    font-family: var(--font-heading);
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-size: 0.9rem;
    color: var(--primary);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.tagline::before {
    content: '';
    display: block;
    width: 15px;
    height: 2px;
    background-color: var(--primary);
}

.hero-title {
    font-size: 3.5rem;
    line-height: 1.15;
    margin-bottom: 1.5rem;
    background: linear-gradient(135deg, var(--text-primary) 30%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-title span {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.hero-description {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

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

.hero-image-wrapper {
    position: relative;
    border-radius: var(--border-radius-lg);
    overflow: hidden;
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.hero-glow-blob {
    position: absolute;
    width: 150%;
    height: 150%;
    background: radial-gradient(circle, var(--primary-glow) 0%, transparent 60%);
    z-index: -1;
    filter: blur(40px);
}

/* Sections */
.section {
    padding: 8rem 0;
    position: relative;
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 5rem;
}

.section-subtitle {
    font-size: 0.95rem;
    font-weight: 600;
    color: var(--primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 0.75rem;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

.section-desc {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* Features Grid */
.grid-3 {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.grid-2 {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
}

.grid-4 {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
}

/* Card Styling */
.card {
    padding: 2.5rem;
    position: relative;
    overflow: hidden;
}

.card:hover {
    transform: translateY(-5px);
    border-color: rgba(99, 102, 241, 0.3);
    box-shadow: 0 12px 30px rgba(99, 102, 241, 0.1);
}

.card-icon {
    width: 60px;
    height: 60px;
    border-radius: 12px;
    background: var(--primary-glow);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.75rem;
    margin-bottom: 1.5rem;
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.card:hover .card-icon {
    background: var(--gradient-primary);
    color: white;
}

.card-title {
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.card-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Products Showcase (Home Page Showcase Grid) */
.product-card {
    padding: 0;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.product-card-img {
    width: 100%;
    height: 200px;
    object-fit: cover;
    border-bottom: 1px solid var(--border-color);
}

.product-card-body {
    padding: 2rem;
    display: flex;
    flex-direction: column;
    flex-grow: 1;
}

.product-card-title {
    font-size: 1.35rem;
    margin-bottom: 0.75rem;
}

.product-card-desc {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
    flex-grow: 1;
}

.product-card-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary);
    font-weight: 600;
    font-size: 0.95rem;
}

.product-card-link svg {
    transition: transform var(--transition-speed);
}

.product-card-link:hover svg {
    transform: translateX(5px);
}

/* Core Values (About Section) */
.about-stats {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-top: 4rem;
    text-align: center;
}

.stat-item {
    padding: 2rem;
}

.stat-number {
    font-size: 3rem;
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    margin-bottom: 0.5rem;
}

.stat-label {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 600;
}

/* Product Detail Pages Styles */
.product-hero {
    padding-top: 160px;
    padding-bottom: 6rem;
    position: relative;
    background-image: radial-gradient(circle at right center, var(--primary-glow) 0%, transparent 50%);
}

.product-hero-grid {
    display: grid;
    grid-template-columns: 1.10fr 0.9fr;
    gap: 4rem;
    align-items: center;
}

.product-hero-content h1 {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.product-hero-content .product-tag {
    display: inline-block;
    padding: 0.35rem 1rem;
    background: var(--primary-glow);
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 700;
    border-radius: 50px;
    margin-bottom: 1.5rem;
}

.product-hero-desc {
    font-size: 1.15rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
}

.feature-list {
    margin: 3rem 0;
    display: grid;
    gap: 1.5rem;
}

.feature-item {
    display: flex;
    gap: 1rem;
}

.feature-icon-check {
    width: 24px;
    height: 24px;
    border-radius: 50%;
    background: var(--accent-glow);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.feature-item-title {
    font-weight: 600;
    margin-bottom: 0.25rem;
}

.feature-item-desc {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.product-showcase-img {
    border-radius: var(--border-radius-lg);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--border-color);
}

.product-tabs-section {
    padding: 5rem 0;
    background: var(--bg-secondary);
}

.tabs-nav {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 3.5rem;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 0.75rem 1.5rem;
    border-radius: 50px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    font-weight: 600;
    cursor: pointer;
    transition: all var(--transition-speed);
}

.tab-btn:hover, .tab-btn.active {
    background: var(--gradient-primary);
    color: white;
    border-color: transparent;
    box-shadow: 0 4px 12px var(--primary-glow);
}

.tab-content {
    display: none;
}

.tab-content.active {
    display: block;
    animation: fadeIn var(--transition-speed) forwards;
}

.feature-grid-detail {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 3rem;
    align-items: center;
}

/* Contact Page Form */
.contact-section {
    padding-top: 160px;
    padding-bottom: 8rem;
}

.contact-grid {
    display: grid;
    grid-template-columns: 0.8fr 1.2fr;
    gap: 4rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2.5rem;
}

.contact-item {
    display: flex;
    gap: 1.25rem;
}

.contact-icon {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    background: var(--primary-glow);
    color: var(--primary);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.contact-info-text h3 {
    font-size: 1.1rem;
    margin-bottom: 0.25rem;
}

.contact-info-text p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.contact-form-wrapper {
    padding: 3rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-label {
    display: block;
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    padding: 0.9rem 1.2rem;
    border-radius: var(--border-radius-sm);
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.95rem;
    transition: all var(--transition-speed);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px var(--primary-glow);
}

textarea.form-control {
    resize: vertical;
    min-height: 150px;
}

/* Map placeholder */
.map-container {
    width: 100%;
    height: 350px;
    border-radius: var(--border-radius-md);
    overflow: hidden;
    border: 1px solid var(--border-color);
    margin-top: 3rem;
    box-shadow: var(--shadow-md);
}

/* CTA Section Banner */
.cta-banner {
    background: linear-gradient(135deg, #100e2b 0%, #1e1b4b 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: 5rem 3rem;
    text-align: center;
    position: relative;
    overflow: hidden;
}

body.light-theme .cta-banner {
    background: linear-gradient(135deg, #e0e7ff 0%, #e8f0fe 100%);
}

.cta-banner-content {
    position: relative;
    z-index: 2;
    max-width: 700px;
    margin: 0 auto;
}

.cta-banner-content h2 {
    font-size: 2.5rem;
    margin-bottom: 1.5rem;
}

.cta-banner-content p {
    color: var(--text-secondary);
    font-size: 1.1rem;
    margin-bottom: 2rem;
}

/* Footer */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border-color);
    padding: 5rem 0 2rem;
    font-size: 0.95rem;
    color: var(--text-secondary);
}

.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.5fr;
    gap: 4rem;
    margin-bottom: 4rem;
}

.footer-col h3 {
    color: var(--text-primary);
    font-size: 1.15rem;
    margin-bottom: 1.5rem;
}

.footer-logo {
    margin-bottom: 1.25rem;
}

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

.footer-links li {
    margin-bottom: 0.75rem;
}

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

.footer-socials {
    display: flex;
    gap: 1rem;
    margin-top: 1.5rem;
}

.social-link {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-tertiary);
    border: 1px solid var(--border-color);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-primary);
    transition: background-color var(--transition-speed), color var(--transition-speed);
}

.social-link:hover {
    background: var(--primary);
    color: white;
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 2rem;
    border-top: 1px solid var(--border-color);
    flex-wrap: wrap;
    gap: 1rem;
}

/* Animation triggers using Intersection Observer */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s cubic-bezier(0.16, 1, 0.3, 1), transform 0.8s cubic-bezier(0.16, 1, 0.3, 1);
}

.animate-on-scroll.appear {
    opacity: 1;
    transform: translateY(0);
}

.delay-1 { transition-delay: 0.1s; }
.delay-2 { transition-delay: 0.2s; }
.delay-3 { transition-delay: 0.3s; }
.delay-4 { transition-delay: 0.4s; }

/* Custom Keyframe Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

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

.floating-graphic {
    animation: float 6s ease-in-out infinite;
}

/* Responsive Styles */
@media (max-width: 1024px) {
    .hero-title { font-size: 3rem; }
    .hero-grid, .product-hero-grid, .contact-grid { gap: 2.5rem; }
    .grid-3 { grid-template-columns: repeat(2, 1fr); }
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 3rem; }
}

@media (max-width: 768px) {
    .mobile-nav-toggle {
        display: block;
    }
    
    .nav-menu {
        position: fixed;
        top: 0;
        right: -100%;
        width: 300px;
        height: 100vh;
        background: var(--bg-secondary);
        border-left: 1px solid var(--border-color);
        flex-direction: column;
        align-items: flex-start;
        padding: 6rem 3rem;
        transition: right var(--transition-speed) cubic-bezier(0.16, 1, 0.3, 1);
        z-index: 999;
        box-shadow: var(--shadow-lg);
    }
    
    .nav-menu.open {
        right: 0;
    }

    /* Mobile Dropdown Overrides */
    .dropdown {
        width: 100%;
    }

    .dropdown-toggle {
        width: 100%;
        justify-content: space-between;
        padding: 0.5rem 0;
    }

    .dropdown:hover .dropdown-toggle svg {
        transform: none; /* Let click event handle rotation or simple layout on mobile */
    }

    .dropdown.open .dropdown-toggle svg {
        transform: rotate(180deg);
    }

    .dropdown-menu {
        position: static !important;
        transform: none !important;
        opacity: 1 !important;
        visibility: visible !important;
        display: none;
        box-shadow: none !important;
        background: transparent !important;
        border: none !important;
        padding: 0.5rem 0 0.5rem 1rem !important;
        margin-top: 0 !important;
        width: 100% !important;
        animation: none !important;
    }

    .dropdown.open .dropdown-menu {
        display: block !important;
    }

    .dropdown-item {
        margin: 0 !important;
        padding: 0.5rem 1rem !important;
    }

    .dropdown-item:hover, .dropdown-item.active {
        padding-left: 1.25rem !important;
        background-color: transparent !important;
        color: var(--primary) !important;
    }
    
    .nav-actions {
        display: none; /* In simple responsive layouts, mobile menu gets toggle or icons moved inside */
    }
    
    .nav-menu-mobile-extra {
        display: flex !important;
        margin-top: 2rem;
        gap: 1.5rem;
    }

    .hero-grid, .product-hero-grid, .contact-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-content {
        align-items: center;
    }
    
    .hero-cta {
        justify-content: center;
    }
    
    .hero-title {
        font-size: 2.5rem;
    }
    
    .grid-2, .grid-3, .grid-4, .feature-grid-detail {
        grid-template-columns: 1fr;
    }
    
    .about-stats {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .contact-form-wrapper {
        padding: 2rem;
    }
}

@media (max-width: 480px) {
    .hero-title { font-size: 2rem; }
    .footer-grid { grid-template-columns: 1fr; }
    .about-stats { grid-template-columns: 1fr; }
    .nav-menu { width: 100%; }
}