/* Định nghĩa biến CSS (Color Palette & Typography) - Đen/Xám/Trắng */
:root {
    --color-primary: #222222; /* Text & Footer Background - Đen */
    --color-secondary: #666666; /* Gray for subtle details - Xám đậm */
    --color-light-gray: #AAAAAA; /* Xám nhạt */
    --color-dark-gray: #333333; /* Xám đen */
    --color-accent: #222222; /* Đen cho highlight/active */
    --color-background: #FFFFFF; /* Trắng */
    --color-top-bar: #2A2A2A; /* Xám đen cho thanh trên */
    --font-family: 'Montserrat', sans-serif;
    --max-width: 1200px;
}

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

body {
    font-family: var(--font-family);
    color: var(--color-primary);
    background-color: var(--color-background);
    line-height: 1.6;
    scroll-behavior: smooth;
}

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

ul {
    list-style: none;
}

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 20px;
}

/* Headers - In hoa, đậm, tối đa hóa tính chuyên nghiệp */
h1 {
    font-size: 4rem; 
    font-weight: 900; 
    text-transform: uppercase;
    line-height: 1.1;
}

h2 {
    font-size: 2.5rem;
    font-weight: 800;
    text-transform: uppercase;
    margin-bottom: 40px;
}

h3 {
    font-size: 1.5rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--color-primary);
}

.section {
    padding: 100px 0; /* Active White Space */
    border-bottom: 1px solid #eee;
}

/* Hình ảnh minh họa */
.img-placeholder {
    width: 100%;
    height: 400px;
    background-color: #f0f0f0;
    display: flex;
    justify-content: center;
    align-items: center;
    overflow: hidden;
}

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

/* CTA Button Styling (Đen) */
.btn {
    display: inline-block;
    padding: 15px 30px;
    background-color: var(--color-primary);
    color: var(--color-background);
    text-transform: uppercase;
    font-weight: 700;
    border: none;
    cursor: pointer;
    transition: background-color 0.3s, opacity 0.3s;
    letter-spacing: 1px;
    text-align: center;
}

.btn:hover {
    background-color: var(--color-dark-gray);
    opacity: 0.9;
}

/* Header & Navigation (Sticky Navbar) */
.header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background-color: rgba(255, 255, 255, 0.95);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.05);
}

.header-top {
    background-color: var(--color-top-bar);
    padding: 8px 0;
    transition: transform 0.3s ease-in-out, opacity 0.3s ease-in-out;
}

.header-top.hidden {
    transform: translateY(-100%);
    opacity: 0;
    height: 0;
    padding: 0;
    overflow: hidden;
}

.header-top-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.header-main {
    background-color: var(--color-background);
    padding: 15px 0;
}

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

.logo {
    font-size: 1.5rem;
    font-weight: 900;
    color: var(--color-primary);
}

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

.logo-box .logo-text {
    margin-left: 10px;
    font-size: 1.2rem;
    font-weight: 800;
    color: var(--color-primary);
}

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

.nav-links {
    display: flex;
    gap: 20px;
    align-items: center;
}

.nav-link {
    font-weight: 700;
    font-size: 0.9rem;
    text-transform: uppercase;
    transition: all 0.3s;
    padding: 8px 16px;
    border-radius: 0;
    color: var(--color-primary);
}

.nav-link:hover {
    color: var(--color-secondary);
}

.nav-link.active {
    background-color: var(--color-background);
    color: var(--color-primary);
    border-bottom: 2px solid var(--color-primary);
    border-radius: 0;
}

/* Navigation Dropdown Icon */
.nav-dropdown-icon {
    display: inline-block;
    margin-left: 6px;
    width: 10px;
    height: 10px;
    flex-shrink: 0;
    transition: transform 0.3s ease;
    color: currentColor;
    vertical-align: middle;
}

.nav-link-wrapper {
    position: relative;
}

/* Submenu Styles */
.nav-submenu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    background-color: var(--color-background);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
    min-width: 200px;
    list-style: none;
    padding: 8px 0;
    margin: 0;
    z-index: 1000;
    border-top: 2px solid var(--color-primary);
}

/* Desktop: Show submenu on hover */
.nav-link-wrapper.has-dropdown:hover .nav-submenu {
    display: block;
}

.nav-subitem {
    position: relative;
    width: 100%;
}

.nav-sublink {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 12px 20px;
    color: var(--color-primary);
    text-decoration: none;
    font-size: 0.85rem;
    font-weight: 600;
    text-transform: uppercase;
    transition: all 0.3s ease;
    white-space: nowrap;
}

.nav-sublink:hover {
    background-color: var(--color-light-gray);
    color: var(--color-primary);
    text-decoration: none;
}

.nav-dropdown-icon--right {
    margin-left: auto;
    margin-right: 0;
}

/* Level 2 Submenu */
.nav-submenu--level2 {
    top: 0;
    left: 100%;
    margin-left: 4px;
    border-top: none;
}

.nav-subitem.has-dropdown:hover .nav-submenu--level2 {
    display: block;
}

.nav-sublink--level2 {
    font-size: 0.8rem;
    padding: 10px 20px;
}

/* Rotate dropdown icon on hover */
.nav-link-wrapper.has-dropdown:hover .nav-dropdown-icon {
    transform: rotate(180deg);
}

.social-icons {
    display: flex;
    gap: 15px;
    align-items: center;
}

.social-icon {
    color: var(--color-background);
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: opacity 0.3s;
}

.social-icon:hover {
    opacity: 0.7;
}

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

.download-btn {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 8px 18px;
    background-color: var(--color-primary);
    color: var(--color-background);
    border-radius: 6px;
    font-weight: 700;
    font-size: 0.85rem;
    text-transform: uppercase;
    transition: background-color 0.3s, opacity 0.3s;
}

.download-btn:hover {
    background-color: var(--color-dark-gray);
    opacity: 0.9;
}

.download-btn svg {
    width: 16px;
    height: 16px;
    stroke: var(--color-background);
}

.header-bottom-line {
    height: 2px;
    background-color: var(--color-light-gray);
    width: 100%;
}

/* Mobile Menu Toggle */
.menu-toggle {
    display: none; /* Hidden on desktop */
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--color-primary);
}

/* Mobile Menu Drawer */
.drawer-menu {
    position: fixed;
    top: 0;
    right: 0;
    width: 300px;
    height: 100%;
    background-color: var(--color-primary);
    color: var(--color-background);
    z-index: 1001;
    transform: translateX(100%);
    transition: transform 0.3s ease-in-out;
    padding: 80px 30px 30px;
}

.drawer-menu.open {
    transform: translateX(0);
}

.drawer-menu ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.drawer-link {
    color: var(--color-background);
    display: block;
    padding: 15px 0;
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    font-weight: 700;
    text-transform: uppercase;
    transition: all 0.3s;
}

.drawer-link:hover {
    color: var(--color-background);
    padding-left: 10px;
    opacity: 0.8;
}

.drawer-link.active {
    color: var(--color-background);
    border-left: 3px solid var(--color-background);
    padding-left: 10px;
    background-color: rgba(255, 255, 255, 0.1);
}

/* Drawer Dropdown Icon */
.drawer-dropdown-icon {
    display: inline-block;
    margin-left: 8px;
    width: 12px;
    height: 12px;
    flex-shrink: 0;
    transition: transform 0.3s ease;
    color: currentColor;
    vertical-align: middle;
}

.drawer-item {
    position: relative;
}

.drawer-link {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

/* Drawer Submenu */
.drawer-submenu {
    display: none;
    list-style: none;
    padding: 0;
    margin: 0;
    background-color: rgba(0, 0, 0, 0.2);
    border-left: 2px solid rgba(255, 255, 255, 0.2);
    margin-left: 20px;
}

.drawer-item.has-dropdown.active .drawer-submenu {
    display: block;
}

.drawer-subitem {
    position: relative;
}

.drawer-sublink {
    display: flex;
    align-items: center;
    justify-content: space-between;
    color: var(--color-background);
    padding: 12px 0 12px 20px;
    border-bottom: 1px solid rgba(255, 255, 255, 0.05);
    font-weight: 600;
    text-transform: uppercase;
    font-size: 0.85rem;
    transition: all 0.3s;
    opacity: 0.9;
}

.drawer-sublink:hover {
    color: var(--color-background);
    padding-left: 30px;
    opacity: 1;
    background-color: rgba(255, 255, 255, 0.05);
}

.drawer-dropdown-icon--right {
    margin-left: auto;
    margin-right: 0;
}

/* Level 2 Submenu */
.drawer-submenu--level2 {
    margin-left: 20px;
    background-color: rgba(0, 0, 0, 0.3);
}

.drawer-sublink--level2 {
    font-size: 0.8rem;
    padding-left: 40px;
}

/* Rotate dropdown icon when active */
.drawer-item.has-dropdown.active .drawer-dropdown-icon {
    transform: rotate(180deg);
}

.drawer-social {
    display: flex;
    gap: 15px;
    margin-top: 30px;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
}

.drawer-social .social-icon {
    color: var(--color-background);
    width: 28px;
    height: 28px;
}

.drawer-social .social-icon:hover {
    opacity: 0.7;
}

.drawer-download-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    padding: 12px 20px;
    background-color: var(--color-background);
    color: var(--color-primary);
    border-radius: 6px;
    font-weight: 700;
    font-size: 0.9rem;
    text-transform: uppercase;
    margin-top: 20px;
    transition: opacity 0.3s;
    text-align: center;
    justify-content: center;
}

.drawer-download-btn:hover {
    opacity: 0.9;
    color: var(--color-primary);
}

.drawer-download-btn svg {
    width: 18px;
    height: 18px;
}

.drawer-close {
    position: absolute;
    top: 20px;
    right: 20px;
    font-size: 2rem;
    cursor: pointer;
    color: var(--color-background);
    transition: opacity 0.3s;
}

.drawer-close:hover {
    opacity: 0.7;
}

/* Floating Sticky CTA (CRO Priority) */
.floating-cta {
    position: fixed;
    bottom: 30px;
    right: 30px;
    z-index: 1000;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.2);
    border-radius: 5px;
    overflow: hidden;
}

/* Section 1: Hero */
#hero {
    min-height: 70vh; 
    position: relative;
    overflow: hidden;
    background-image: url('https://images.unsplash.com/photo-1552664730-d307ca884978?ixlib=rb-4.0.3&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&w=2070&q=80');
    background-size: cover;
    background-position: center center;
    background-repeat: no-repeat;
    display: flex;
    align-items: flex-end;
    padding: 0;
}

.hero-overlay-box {
    position: absolute;
    bottom: 40px;
    left: 60px;
    width: auto;
    max-width: 480px;
    background-color: var(--color-primary);
    padding: 40px 50px;
    z-index: 10;
    opacity: 0.95;
}

.hero-overlay-content {
    display: flex;
    flex-direction: column;
    gap: 0;
}

.hero-overlay-title {
    font-size: 2.5rem;
    font-weight: 900;
    text-transform: uppercase;
    line-height: 1.1;
    margin: 0;
}

.hero-overlay-text {
    color: var(--color-background);
    font-size: 1.2rem;
    font-weight: 400;
    line-height: 1.6;
    margin: 10px 0 0 0;
    text-transform: none;
    letter-spacing: 0.3px;
}

.hero-overlay-btn {
    display: inline-block;
    background-color: var(--color-primary);
    color: var(--color-background);
    padding: 15px 30px;
    border-radius: 0;
    font-weight: 700;
    font-size: 0.9rem;
    text-transform: uppercase;
    margin-top: 30px;
    width: fit-content;
    transition: opacity 0.3s, transform 0.2s;
    text-decoration: none;
    border: none;
    cursor: pointer;
    letter-spacing: 1px;
}

.hero-overlay-btn:hover {
    opacity: 0.9;
    transform: translateY(-1px);
    color: var(--color-background);
    background-color: var(--color-dark-gray);
}

/* Mobile adjustments for hero */
@media (max-width: 768px) {
    .hero-overlay-box {
        bottom: 20px;
        left: 20px;
        right: 20px;
        max-width: none;
        padding: 25px 30px;
    }
    
    .hero-overlay-title {
        font-size: 1.8rem;
    }
    
    .hero-overlay-text {
        font-size: 1rem;
    }
    
    #hero {
        min-height: 60vh;
    }
}

/* Section: Why Broda - 2 Column Layout */
#why-broda {
    padding: 120px 0;
    background-color: var(--color-background);
}

.mb-4 {
    margin-bottom: 2rem;
}

.why-broda-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 100px;
    align-items: center;
    margin-top: 60px;
}

.why-broda-image {
    width: 100%;
    height: 650px;
    overflow: hidden;
    position: relative;
    background-color: #f5f5f5;
}

.why-broda-image::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(180deg, rgba(255, 255, 255, 0) 0%, rgba(255, 255, 255, 0.02) 100%);
    z-index: 1;
    pointer-events: none;
}

.why-broda-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.6s ease;
}

.why-broda-image:hover img {
    transform: scale(1.05);
}

.why-broda-text {
    display: flex;
    flex-direction: column;
    gap: 24px;
    padding-left: 20px;
}

.why-broda-main-title {
    font-size: 3rem;
    font-weight: 800;
    text-transform: uppercase;
    color: var(--color-primary);
    margin: 0 0 20px 0;
    line-height: 1.1;
    letter-spacing: -0.5px;
}

.why-broda-intro {
    font-size: 1.15rem;
    color: var(--color-secondary);
    line-height: 1.7;
    margin: 0;
    font-weight: 400;
    max-width: 90%;
}

.why-broda-subtitle {
    font-size: 2.2rem;
    font-weight: 800;
    text-transform: uppercase;
    color: var(--color-primary);
    margin: 0;
    line-height: 1.2;
    letter-spacing: -0.3px;
}

.why-broda-description {
    font-size: 1.05rem;
    color: var(--color-secondary);
    line-height: 1.8;
    margin: 0;
    font-weight: 400;
}

.why-broda-values {
    list-style: none;
    padding: 0;
    margin: 40px 0 30px 0;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.why-broda-values li {
    position: relative;
    padding-left: 35px;
    font-size: 1.05rem;
    color: var(--color-primary);
    line-height: 1.7;
    font-weight: 400;
    transition: padding-left 0.3s ease;
}

.why-broda-values li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 50%;
    transform: translateY(-50%);
    width: 16px;
    height: 2px;
    background-color: var(--color-primary);
    transition: width 0.3s ease;
}

.why-broda-values li:hover {
    padding-left: 40px;
}

.why-broda-values li:hover::before {
    width: 20px;
}

.why-broda-cta {
    display: inline-block;
    color: var(--color-primary);
    font-size: 1.05rem;
    font-weight: 600;
    text-decoration: none;
    margin-top: 10px;
    position: relative;
    width: fit-content;
    transition: all 0.3s ease;
    letter-spacing: 0.3px;
}

.why-broda-cta::after {
    content: '';
    position: absolute;
    bottom: -6px;
    left: 0;
    width: 100%;
    height: 2px;
    background-color: var(--color-primary);
    transition: width 0.4s ease;
}

.why-broda-cta:hover {
    color: var(--color-dark-gray);
    padding-left: 5px;
}

.why-broda-cta:hover::after {
    width: 0;
}

/* Mobile adjustments for why-broda */
@media (max-width: 768px) {
    #why-broda {
        padding: 80px 0;
    }
    
    .why-broda-content {
        grid-template-columns: 1fr;
        gap: 50px;
        margin-top: 40px;
    }
    
    .why-broda-image {
        height: 400px;
    }
    
    .why-broda-text {
        padding-left: 0;
    }
    
    .why-broda-main-title {
        font-size: 2rem;
        margin-bottom: 15px;
    }
    
    .why-broda-intro {
        font-size: 1rem;
        max-width: 100%;
    }
    
    .why-broda-subtitle {
        font-size: 1.6rem;
    }
    
    .why-broda-description {
        font-size: 0.95rem;
    }
    
    .why-broda-values {
        margin: 30px 0 20px 0;
        gap: 15px;
    }
    
    .why-broda-values li {
        font-size: 0.95rem;
        padding-left: 30px;
    }
}

/* Section: Expertise */
.expertise-section {
    background-color: #f7f7f7;
    padding: 100px 0;
}

.expertise-title {
    text-align: center;
    font-size: 2.5rem;
    font-weight: 800;
    text-transform: uppercase;
    color: var(--color-primary);
    margin-bottom: 60px;
    letter-spacing: -0.3px;
}

.expertise-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
    margin-top: 50px;
}

.expertise-card-wide {
    grid-column: span 2;
}

.expertise-card {
    background-color: var(--color-background);
    padding: 40px 30px;
    border: 1px solid #e0e0e0;
    transition: all 0.3s ease;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.expertise-card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 8px 30px rgba(0, 0, 0, 0.08);
    transform: translateY(-5px);
}

.expertise-icon {
    width: 60px;
    height: 60px;
    margin-bottom: 25px;
    color: var(--color-primary);
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.3s ease;
}

.expertise-card:hover .expertise-icon {
    transform: scale(1.1);
}

.expertise-icon svg {
    width: 100%;
    height: 100%;
    stroke-width: 1.5;
}

.expertise-card h3 {
    font-size: 1.3rem;
    font-weight: 700;
    text-transform: uppercase;
    color: var(--color-primary);
    margin: 0 0 15px 0;
    line-height: 1.3;
}

.expertise-card p {
    font-size: 1rem;
    color: var(--color-secondary);
    line-height: 1.7;
    margin: 0;
    font-weight: 400;
}

/* Mobile adjustments for expertise */
@media (max-width: 1024px) {
    .expertise-grid {
        grid-template-columns: repeat(2, 1fr);
    }
    
    .expertise-card-wide {
        grid-column: span 2;
    }
}

@media (max-width: 768px) {
    .expertise-section {
        padding: 80px 0;
    }
    
    .expertise-title {
        font-size: 2rem;
        margin-bottom: 40px;
    }
    
    .expertise-grid {
        grid-template-columns: 1fr;
        gap: 25px;
        margin-top: 30px;
    }
    
    .expertise-card-wide {
        grid-column: span 1;
    }
    
    .expertise-card {
        padding: 30px 25px;
    }
    
    .expertise-icon {
        width: 50px;
        height: 50px;
        margin-bottom: 20px;
    }
    
    .expertise-card h3 {
        font-size: 1.1rem;
    }
}

/* Section: Testimonials */
.testimonials-section {
    padding: 120px 0;
    background-color: var(--color-background);
}

.testimonials-content {
    max-width: 1000px;
    margin: 0 auto;
}

.testimonials-quote {
    margin-bottom: 60px;
}

.testimonials-carousel {
    position: relative;
}

.testimonial-item {
    text-align: center;
    padding: 40px 20px 20px 20px;
}

.testimonial-text {
    font-size: 1.8rem;
    font-weight: 400;
    color: var(--color-primary);
    line-height: 1.6;
    margin: 0 0 40px 0;
    font-style: normal;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.testimonial-author {
    text-align: left;
    max-width: 800px;
    margin: 0 auto;
}

.author-name {
    font-size: 1.1rem;
    font-weight: 700;
    color: var(--color-primary);
    margin: 0 0 5px 0;
    text-transform: uppercase;
}

.author-title {
    font-size: 1rem;
    color: var(--color-secondary);
    margin: 0;
    font-weight: 400;
}

.testimonials-bottom {
    display: flex;
    justify-content: space-between;
    align-items: flex-end;
    margin-top: 80px;
    padding-top: 40px;
    border-top: 1px solid #e0e0e0;
}

.testimonials-label {
    font-size: 1rem;
    color: var(--color-secondary);
    margin: 0;
    font-weight: 400;
    text-transform: uppercase;
    letter-spacing: 1px;
}

.testimonials-thumbnails {
    display: flex;
    gap: 15px;
}

.thumbnail-item {
    width: 120px;
    height: 80px;
    overflow: hidden;
    background-color: #f0f0f0;
}

.thumbnail-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

/* Owl Carousel Custom Styles */
.testimonials-carousel .owl-nav {
    display: flex;
    justify-content: center;
    gap: 20px;
}

.testimonials-carousel .owl-nav button {
    width: 50px;
    height: 50px;
    border: 2px solid var(--color-primary);
    background-color: transparent;
    color: var(--color-primary);
    font-size: 1.5rem;
    border-radius: 0;
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

.testimonials-carousel .owl-nav button:hover {
    background-color: var(--color-primary);
    color: var(--color-background);
}

.testimonials-carousel .owl-nav button.owl-prev::before {
    content: '←';
}

.testimonials-carousel .owl-nav button.owl-next::before {
    content: '→';
}

.testimonials-carousel .owl-dots {
    display: none;
}

/* Mobile adjustments for testimonials */
@media (max-width: 768px) {
    .testimonials-section {
        padding: 80px 0;
    }
    
    .testimonial-text {
        font-size: 1.3rem;
        padding: 0 10px;
    }
    
    .testimonials-bottom {
        flex-direction: column;
        align-items: flex-start;
        gap: 30px;
        margin-top: 50px;
    }
    
    .testimonials-thumbnails {
        width: 100%;
        justify-content: flex-start;
    }
    
    .thumbnail-item {
        width: 100px;
        height: 70px;
    }
}

/* Section 4: Partners (Grayscale for Clean look) */
.logo-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 40px;
    align-items: center;
    justify-items: center;
    margin-top: 50px;
}

#partners .logo-item {
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--color-secondary); /* Grayscale/subdued effect */
    opacity: 0.7;
    text-align: center;
}

/* Section 6: Case Studies (Big Numbers & Accent) */
.case-study-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 40px;
}

.case-study-card {
    border: 1px solid var(--color-secondary);
    padding: 30px;
    transition: box-shadow 0.3s;
    display: flex;
    flex-direction: column;
}

.case-study-card .img-placeholder {
    height: 200px; 
    margin-bottom: 20px;
}

.case-study-card:hover {
    box-shadow: 0 8px 25px rgba(0, 0, 0, 0.1);
}

.result-highlight {
    font-size: 3rem;
    font-weight: 900;
    color: var(--color-primary);
    margin: 10px 0;
    display: block; 
}

/* Section 7: Approach */
.approach-step {
    flex: 1; 
    min-width: 250px; 
    padding: 20px; 
    border: 2px solid var(--color-primary);
    position: relative;
}

.approach-step .step-icon {
    display: block;
    margin-bottom: 15px;
}

.approach-step svg {
    width: 40px;
    height: 40px;
    fill: none;
    stroke: var(--color-primary);
    stroke-width: 2;
}

/* Footer */
.footer {
    background-color: var(--color-primary);
    color: var(--color-secondary);
    padding: 40px 0;
    font-size: 0.9rem;
    text-align: center;
}

.footer a {
    color: var(--color-secondary);
    margin: 0 10px;
    transition: color 0.3s;
}

.footer a:hover {
    color: var(--color-background);
    opacity: 0.8;
}

/* Form Styles */
form input[type="text"],
form input[type="email"],
form textarea {
    width: 100%;
    padding: 15px;
    margin-bottom: 15px;
    border: 1px solid var(--color-secondary);
    font-family: var(--font-family);
    font-size: 1rem;
}

form input[type="text"]:focus,
form input[type="email"]:focus,
form textarea:focus {
    outline: none;
    border-color: var(--color-primary);
}

/* Mobile Adjustments (Mobile-First) */
@media (max-width: 768px) {
    h1 {
        font-size: 2.5rem;
    }
    h2 {
        font-size: 2rem;
    }
    /* Mobile: Submenu styles */
    .nav-link-wrapper {
        width: 100%;
    }
    
    .nav-submenu {
        position: static;
        display: none;
        box-shadow: none;
        border-top: none;
        background-color: rgba(0, 0, 0, 0.1);
        margin-top: 0;
        padding: 0;
    }
    
    .nav-link-wrapper.has-dropdown.active .nav-submenu {
        display: block;
    }
    
    .nav-sublink {
        padding: 10px 20px 10px 40px;
        font-size: 0.8rem;
    }
    
    .nav-submenu--level2 {
        position: static;
        margin-left: 0;
        background-color: rgba(0, 0, 0, 0.15);
    }
    
    .nav-sublink--level2 {
        padding-left: 60px;
    }
    
    .nav-link-wrapper.has-dropdown.active .nav-dropdown-icon {
        transform: rotate(180deg);
    }

    .nav-links {
        display: none; 
    }
    .header-top {
        display: none;
    }
    .menu-toggle {
        display: block; /* Show hamburger icon */
    }
    .navbar {
        justify-content: space-between; 
    }
    #hero {
        min-height: 70vh;
    }
    .floating-cta {
        bottom: 20px;
        right: 20px;
    }
    .case-study-grid {
        grid-template-columns: 1fr;
    }
    .btn {
        padding: 12px 20px;
    }
}