/* LANDING PAGE CSS - TUYỂN SINH ITT ĐỒNG THÁP */
:root {
    /* Color Palette */
    --color-primary: #0b4a8f;       /* Xanh dương đậm ITT */
    --color-primary-light: #1c64b4; /* Xanh dương sáng */
    --color-accent-orange: #ff7a00; /* Màu cam tuyển sinh nổi bật */
    --color-accent-orange-hover: #e06a00;
    --color-bg-light: #f8fafc;      /* Slate 50 */
    --color-bg-gray: #f1f5f9;       /* Slate 100 */
    --color-text-dark: #0f172a;     /* Slate 900 */
    --color-text-body: #334155;     /* Slate 700 */
    --color-text-muted: #64748b;    /* Slate 500 */
    --color-white: #ffffff;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, #0b4a8f 0%, #1c64b4 100%);
    --gradient-orange: linear-gradient(135deg, #ff9800 0%, #ff7a00 100%);
    --gradient-hero: linear-gradient(135deg, rgba(11, 74, 143, 0.95) 0%, rgba(28, 100, 180, 0.85) 100%);
    --gradient-glass: rgba(255, 255, 255, 0.85);

    /* Shadow & Radius */
    --shadow-sm: 0 2px 8px rgba(15, 23, 42, 0.04);
    --shadow-md: 0 10px 25px rgba(15, 23, 42, 0.08);
    --shadow-lg: 0 20px 40px rgba(15, 23, 42, 0.12);
    --shadow-orange: 0 8px 24px rgba(255, 122, 0, 0.3);
    
    --radius-sm: 8px;
    --radius-md: 16px;
    --radius-lg: 30px;
    
    --transition-smooth: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --font-family: 'Be Vietnam Pro', sans-serif;
}

/* RESET & BASE */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-family: var(--font-family);
    color: var(--color-text-body);
    background-color: var(--color-bg-light);
}

body {
    overflow-x: hidden;
    line-height: 1.6;
}

.container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

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


/* TYPOGRAPHY */
h1, h2, h3, h4, h5, h6 {
    color: var(--color-text-dark);
    font-weight: 700;
    line-height: 1.3;
}

/* HEADER */
.main-header {
    background-color: var(--color-white);
    box-shadow: var(--shadow-sm);
    position: sticky;
    top: 0;
    z-index: 1000;
    transition: var(--transition-smooth);
}

.main-header.sticky {
    padding: 10px 0;
    background-color: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-md);
}

.header-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 80px;
}

.logo-brand {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
}

.logo-img {
    height: 55px;
    width: auto;
}

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

.logo-title {
    font-size: 1.1rem;
    font-weight: 800;
    color: var(--color-primary);
    letter-spacing: 0.5px;
}

.logo-subtitle {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--color-text-muted);
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 30px;
}

.nav-list {
    display: flex;
    list-style: none;
    gap: 25px;
}

.nav-link {
    font-weight: 600;
    font-size: 0.95rem;
    color: var(--color-text-dark);
    text-decoration: none;
    transition: var(--transition-smooth);
    position: relative;
    padding: 8px 0;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 3px;
    background-color: var(--color-accent-orange);
    transition: var(--transition-smooth);
    border-radius: 2px;
}

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

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

.btn-header-apply {
    background: var(--gradient-orange);
    color: var(--color-white);
    padding: 10px 24px;
    border-radius: var(--radius-lg);
    font-weight: 700;
    font-size: 0.9rem;
    text-transform: uppercase;
    box-shadow: var(--shadow-orange);
    border: none;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.btn-header-apply:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(255, 122, 0, 0.45);
}

.mobile-nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    flex-direction: column;
    gap: 6px;
}

.mobile-nav-toggle span {
    display: block;
    width: 28px;
    height: 3px;
    background-color: var(--color-primary);
    border-radius: 2px;
    transition: var(--transition-smooth);
}

/* HERO SECTION */
.hero-section {
    position: relative;
    padding: 120px 0 160px;
    background-image: url('images/hero_vietnamese_students.png');
    background-size: cover;
    background-position: center;
    color: var(--color-white);
    overflow: hidden;
}

.hero-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: var(--gradient-hero);
    z-index: 1;
}

.hero-wrapper {
    position: relative;
    z-index: 2;
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 40px;
    align-items: center;
}

.hero-badge {
    display: inline-block;
    background-color: rgba(255, 255, 255, 0.15);
    border: 1px solid rgba(255, 255, 255, 0.25);
    backdrop-filter: blur(8px);
    padding: 6px 16px;
    border-radius: var(--radius-lg);
    font-size: 0.85rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 24px;
    color: #ffd085;
}

.hero-title {
    font-size: 3rem;
    font-weight: 800;
    line-height: 1.2;
    color: var(--color-white);
    margin-bottom: 20px;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
}

.hero-title span {
    color: #ffb74d;
}

.hero-desc {
    font-size: 1.1rem;
    line-height: 1.7;
    margin-bottom: 35px;
    color: rgba(255, 255, 255, 0.9);
}

.hero-actions {
    display: flex;
    gap: 20px;
}

.btn-hero-primary {
    background: var(--gradient-orange);
    color: var(--color-white) !important;
    padding: 14px 32px;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 1rem;
    box-shadow: var(--shadow-orange);
    transition: var(--transition-smooth);
    border: none;
    cursor: pointer;
}

.btn-hero-primary:hover {
    transform: translateY(-3px);
    box-shadow: 0 12px 30px rgba(255, 122, 0, 0.5);
}

.btn-hero-secondary {
    background-color: rgba(255, 255, 255, 0.1);
    color: var(--color-white) !important;
    border: 2px solid rgba(255, 255, 255, 0.3);
    padding: 12px 30px;
    border-radius: var(--radius-md);
    font-weight: 700;
    font-size: 1rem;
    transition: var(--transition-smooth);
    cursor: pointer;
}

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

/* SECTION COMMON */
.section {
    padding: 90px 0;
}

.section-bg-light {
    background-color: var(--color-bg-light);
}

.section-bg-gray {
    background-color: var(--color-bg-gray);
}

.section-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.section-subtitle {
    display: inline-block;
    color: var(--color-accent-orange);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 0.85rem;
    letter-spacing: 2px;
    margin-bottom: 12px;
}

.section-title {
    font-size: 2.25rem;
    color: var(--color-primary);
    margin-bottom: 16px;
    position: relative;
    padding-bottom: 16px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background-color: var(--color-accent-orange);
    border-radius: 2px;
}

.section-desc {
    font-size: 1.05rem;
    color: var(--color-text-muted);
}

/* ABOUT SECTION */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: center;
}

.about-content h3 {
    font-size: 1.8rem;
    color: var(--color-primary);
    margin-bottom: 20px;
}

.about-content p {
    font-size: 1.05rem;
    margin-bottom: 24px;
    color: var(--color-text-body);
}

.about-features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.about-feat-item {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.about-feat-icon {
    width: 24px;
    height: 24px;
    color: var(--color-accent-orange);
    flex-shrink: 0;
}

.about-feat-text h4 {
    font-size: 1rem;
    margin-bottom: 4px;
}

.about-feat-text p {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    margin: 0;
}

.about-image-wrapper {
    position: relative;
}

.about-image {
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    width: 100%;
    object-fit: cover;
}

.about-badge-card {
    position: absolute;
    bottom: -20px;
    left: -20px;
    background: var(--gradient-primary);
    color: var(--color-white);
    padding: 24px;
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    text-align: center;
    max-width: 180px;
}

.about-badge-num {
    font-size: 2.2rem;
    font-weight: 800;
    line-height: 1;
    margin-bottom: 4px;
    color: #ffd085;
}

.about-badge-text {
    font-size: 0.8rem;
    font-weight: 600;
    text-transform: uppercase;
}

/* LOCATIONS & MAJORS SECTION */
.tabs-container {
    margin-bottom: 40px;
}

.tabs-list {
    display: flex;
    justify-content: center;
    gap: 15px;
    list-style: none;
    flex-wrap: wrap;
}

.tab-btn {
    background-color: var(--color-white);
    border: 1px solid rgba(15, 23, 42, 0.08);
    padding: 14px 24px;
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--color-text-dark);
    cursor: pointer;
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-sm);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
}

.tab-btn span.tab-sub {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--color-text-muted);
}

.tab-btn:hover {
    border-color: var(--color-primary-light);
    color: var(--color-primary);
    transform: translateY(-2px);
}

.tab-btn.active {
    background: var(--gradient-primary);
    color: var(--color-white);
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.tab-btn.active span.tab-sub {
    color: rgba(255, 255, 255, 0.8);
}

.location-info-bar {
    background-color: rgba(11, 74, 143, 0.05);
    border-left: 4px solid var(--color-primary);
    padding: 16px 24px;
    border-radius: 0 var(--radius-sm) var(--radius-sm) 0;
    margin-bottom: 30px;
    font-weight: 500;
}

.location-info-bar strong {
    color: var(--color-primary);
}

.majors-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 30px;
}

.major-card {
    background-color: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-sm);
    padding: 30px;
    border: 1px solid rgba(15, 23, 42, 0.04);
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    position: relative;
    overflow: hidden;
}

.major-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: var(--gradient-primary);
    opacity: 0;
    transition: var(--transition-smooth);
}

.major-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

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

.major-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 20px;
}

.major-icon-wrapper {
    width: 50px;
    height: 50px;
    background-color: rgba(11, 74, 143, 0.08);
    color: var(--color-primary);
    border-radius: var(--radius-sm);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.major-badge-field {
    background-color: rgba(255, 122, 0, 0.1);
    color: var(--color-accent-orange);
    padding: 4px 10px;
    border-radius: 4px;
    font-size: 0.75rem;
    font-weight: 700;
    text-transform: uppercase;
}

.major-name {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--color-text-dark);
    margin-bottom: 8px;
}

.major-code {
    font-size: 0.85rem;
    color: var(--color-text-muted);
    font-weight: 500;
    margin-bottom: 16px;
}

.major-details-list {
    list-style: none;
    margin-bottom: 25px;
    border-top: 1px dashed rgba(15, 23, 42, 0.1);
    padding-top: 16px;
}

.major-detail-item {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    margin-bottom: 8px;
}

.major-detail-label {
    color: var(--color-text-muted);
}

.major-detail-val {
    font-weight: 600;
    color: var(--color-text-dark);
}

.btn-major-apply {
    background-color: var(--color-white);
    color: var(--color-accent-orange);
    border: 2px solid var(--color-accent-orange);
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-weight: 700;
    width: 100%;
    cursor: pointer;
    transition: var(--transition-smooth);
    text-align: center;
}

.btn-major-apply:hover {
    background: var(--gradient-orange);
    color: var(--color-white);
    border-color: transparent;
    box-shadow: var(--shadow-orange);
}

/* ADVANTAGES SECTION */
.adv-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 30px;
}

.adv-card {
    background-color: var(--color-white);
    border-radius: var(--radius-md);
    padding: 40px 30px;
    box-shadow: var(--shadow-sm);
    border: 1px solid rgba(15, 23, 42, 0.03);
    transition: var(--transition-smooth);
    text-align: center;
}

.adv-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-md);
}

.adv-icon-container {
    width: 70px;
    height: 70px;
    background-color: rgba(255, 122, 0, 0.08);
    color: var(--color-accent-orange);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    font-size: 2rem;
}

.adv-card:nth-child(even) .adv-icon-container {
    background-color: rgba(11, 74, 143, 0.08);
    color: var(--color-primary);
}

.adv-title {
    font-size: 1.25rem;
    margin-bottom: 12px;
    color: var(--color-text-dark);
}

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

/* FORM REGISTER SECTION */
.register-section {
    background-color: var(--color-primary);
    color: var(--color-white);
    position: relative;
    overflow: hidden;
    padding: 100px 0;
}

.register-section::before {
    content: '';
    position: absolute;
    top: -100px;
    right: -100px;
    width: 400px;
    height: 400px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.05);
    pointer-events: none;
}

.register-section::after {
    content: '';
    position: absolute;
    bottom: -100px;
    left: -100px;
    width: 300px;
    height: 300px;
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.03);
    pointer-events: none;
}

.register-grid {
    display: grid;
    grid-template-columns: 0.9fr 1.1fr;
    gap: 60px;
    align-items: center;
    position: relative;
    z-index: 2;
}

.register-info h2 {
    color: var(--color-white);
    font-size: 2.5rem;
    margin-bottom: 20px;
}

.register-info p {
    color: rgba(255, 255, 255, 0.85);
    font-size: 1.1rem;
    margin-bottom: 40px;
}

.contact-info-list {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-info-item {
    display: flex;
    align-items: center;
    gap: 16px;
}

.contact-icon-box {
    width: 45px;
    height: 45px;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.2rem;
    color: #ffd085;
}

.contact-text-box h4 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: rgba(255, 255, 255, 0.6);
    margin-bottom: 2px;
}

.contact-text-box p {
    color: var(--color-white);
    font-size: 1.05rem;
    font-weight: 600;
    margin: 0;
}

.register-form-container {
    background-color: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    padding: 40px;
    color: var(--color-text-dark);
}

.form-title {
    font-size: 1.5rem;
    color: var(--color-primary);
    margin-bottom: 6px;
    text-align: center;
}

.form-subtitle {
    text-align: center;
    font-size: 0.9rem;
    color: var(--color-text-muted);
    margin-bottom: 30px;
}

.form-group-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
    margin-bottom: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
    margin-bottom: 20px;
}

.form-label {
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--color-text-dark);
}

.form-input {
    width: 100%;
    border: 1px solid rgba(15, 23, 42, 0.15);
    border-radius: var(--radius-sm);
    padding: 12px 16px;
    font-size: 0.95rem;
    font-family: var(--font-family);
    transition: var(--transition-smooth);
    background-color: var(--color-bg-light);
}

.form-input:focus {
    border-color: var(--color-primary);
    background-color: var(--color-white);
    box-shadow: 0 0 0 3px rgba(11, 74, 143, 0.15);
}

select.form-input {
    cursor: pointer;
}

.btn-form-submit {
    background: var(--gradient-orange);
    color: var(--color-white);
    border: none;
    padding: 14px 20px;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 1rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    width: 100%;
    cursor: pointer;
    transition: var(--transition-smooth);
    box-shadow: var(--shadow-orange);
    margin-top: 10px;
}

.btn-form-submit:hover {
    transform: translateY(-2px);
    box-shadow: 0 12px 28px rgba(255, 122, 0, 0.45);
}

.btn-form-submit:disabled {
    background: var(--color-text-muted);
    box-shadow: none;
    cursor: not-allowed;
}

/* SUCCESS BOX */
.success-msg-show {
    text-align: center;
    padding: 30px 10px;
}

.success-icon {
    width: 70px;
    height: 70px;
    background-color: rgba(34, 197, 94, 0.1);
    color: #22c55e;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 2.5rem;
    margin: 0 auto 20px;
}

.success-msg-show h3 {
    color: #22c55e;
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.success-msg-show p {
    color: var(--color-text-body);
    font-size: 0.95rem;
    margin-bottom: 24px;
}

.btn-reset-form {
    background-color: var(--color-primary);
    color: var(--color-white);
    border: none;
    padding: 10px 24px;
    border-radius: var(--radius-sm);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.btn-reset-form:hover {
    background-color: var(--color-primary-light);
}

/* TESTIMONIALS SECTION */
.testi-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 60px;
    align-items: center;
}

.testi-quote-box {
    background-color: var(--color-white);
    border-radius: var(--radius-md);
    padding: 40px;
    box-shadow: var(--shadow-md);
    position: relative;
}

.testi-quote-box::before {
    content: '"';
    position: absolute;
    top: 10px;
    left: 20px;
    font-size: 8rem;
    font-family: serif;
    color: rgba(255, 122, 0, 0.08);
    line-height: 1;
}

.testi-text {
    font-size: 1.15rem;
    font-style: italic;
    line-height: 1.8;
    color: var(--color-text-dark);
    margin-bottom: 24px;
    position: relative;
    z-index: 2;
}

.testi-author {
    display: flex;
    align-items: center;
    gap: 16px;
}

.testi-avatar {
    width: 60px;
    height: 60px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid rgba(255, 122, 0, 0.2);
}

.testi-author-name {
    font-weight: 700;
    color: var(--color-primary);
    font-size: 1.05rem;
}

.testi-author-desc {
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.testi-images {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

.testi-img-item {
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    height: 180px;
}

.testi-img-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition-smooth);
}

.testi-img-item:hover img {
    transform: scale(1.1);
}

/* FOOTER */
.footer {
    background-color: var(--color-text-dark);
    color: rgba(255, 255, 255, 0.7);
    padding: 70px 0 30px;
    font-size: 0.9rem;
}

.footer h3 {
    color: var(--color-white);
    font-size: 1.2rem;
    margin-bottom: 24px;
    font-weight: 700;
}

.footer-grid {
    display: grid;
    grid-template-columns: 1fr 1fr 1fr;
    gap: 40px;
    margin-bottom: 50px;
}

.footer-about p {
    margin-bottom: 20px;
    line-height: 1.7;
}

.footer-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 20px;
}

.footer-logo img {
    height: 45px;
}

.footer-logo-title {
    color: var(--color-white);
    font-weight: 800;
    font-size: 1rem;
}

.footer-logo-sub {
    color: rgba(255, 255, 255, 0.5);
    font-size: 0.75rem;
    display: block;
}

.footer-campuses-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.footer-campus-item strong {
    color: var(--color-white);
    display: block;
    margin-bottom: 4px;
    font-size: 0.85rem;
}

.footer-campus-item span {
    display: block;
    font-size: 0.8rem;
    padding-left: 8px;
    border-left: 2px solid rgba(255, 122, 0, 0.5);
}

.footer-links ul {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 12px;
}

.footer-links a,
.footer-links a:visited {
    color: rgba(255, 255, 255, 0.7);
    text-decoration: none;
    transition: var(--transition-smooth);
}

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

.footer-bottom {
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    padding-top: 30px;
    text-align: center;
    font-size: 0.8rem;
}

/* RESPONSIVE */
@media (max-width: 1024px) {
    .hero-title {
        font-size: 2.5rem;
    }
    .hero-wrapper, .about-grid, .register-grid, .testi-grid {
        gap: 40px;
    }
    .footer-grid {
        grid-template-columns: 1fr 1fr;
    }
    .footer-links {
        grid-column: span 2;
    }
}

@media (max-width: 768px) {
    .mobile-nav-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: fixed;
        top: 80px;
        left: -100%;
        width: 100%;
        height: calc(100vh - 80px);
        background-color: var(--color-white);
        flex-direction: column;
        align-items: center;
        padding: 50px 20px;
        transition: var(--transition-smooth);
        box-shadow: var(--shadow-lg);
        z-index: 999;
    }
    
    .nav-menu.show {
        left: 0;
    }
    
    .nav-list {
        flex-direction: column;
        align-items: center;
        gap: 30px;
        margin-bottom: 40px;
    }
    
    .hero-wrapper {
        grid-template-columns: 1fr;
        text-align: center;
    }
    
    .hero-badge {
        margin: 0 auto 24px;
    }
    
    .hero-actions {
        justify-content: center;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
    }
    
    .about-image-wrapper {
        order: -1;
        max-width: 500px;
        margin: 0 auto;
    }
    
    .register-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .register-info {
        text-align: center;
        width: 100%;
    }

    .register-info h2 {
        font-size: 1.8rem;
        word-wrap: break-word;
        overflow-wrap: break-word;
    }

    .register-info p {
        font-size: 1rem;
        margin-bottom: 30px;
    }

    .register-form-container {
        padding: 24px 20px;
        width: 100%;
    }
    
    .contact-info-list {
        align-items: center;
    }
    
    .form-group-grid {
        grid-template-columns: 1fr;
        gap: 15px;
    }
    
    .testi-grid {
        grid-template-columns: 1fr;
    }
    
    .testi-images {
        display: none;
    }
    
    .footer-grid {
        grid-template-columns: 1fr;
    }
    
    .footer-links {
        grid-column: span 1;
    }
}


/* MODAL PHÁP LÝ */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(15, 23, 42, 0.6);
    backdrop-filter: blur(5px);
    display: none;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    transition: opacity 0.3s ease;
    padding: 20px;
}

.modal-overlay.show {
    display: flex;
    opacity: 1;
}

.modal-box {
    background-color: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    width: 100%;
    max-width: 650px;
    max-height: 90vh;
    overflow-y: auto;
    position: relative;
    transform: translateY(-30px);
    transition: transform 0.3s ease;
}

.modal-overlay.show .modal-box {
    transform: translateY(0);
}

.modal-header-box {
    padding: 20px 24px;
    border-bottom: 1px solid rgba(15, 23, 42, 0.08);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header-title {
    font-size: 1.3rem;
    color: var(--color-primary);
    font-weight: 700;
}

.modal-close-btn {
    background: none;
    border: none;
    font-size: 1.8rem;
    cursor: pointer;
    color: var(--color-text-muted);
    transition: var(--transition-smooth);
    line-height: 1;
}

.modal-close-btn:hover {
    color: var(--color-accent-orange);
}

.modal-body-box {
    padding: 24px;
}

.modal-body-box h4 {
    color: var(--color-primary);
    margin-bottom: 12px;
    font-size: 1.05rem;
}

.modal-body-box p {
    margin-bottom: 16px;
    font-size: 0.95rem;
    line-height: 1.6;
}

.phaply-table {
    width: 100%;
    border-collapse: collapse;
    margin-bottom: 20px;
}

.phaply-table td {
    padding: 10px 12px;
    border-bottom: 1px solid rgba(15, 23, 42, 0.05);
    font-size: 0.9rem;
    vertical-align: top;
}

.phaply-table tr:last-child td {
    border-bottom: none;
}

.phaply-label {
    font-weight: 700;
    color: var(--color-text-dark);
    width: 35%;
}

.btn-pdf-view {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    background-color: rgba(255, 122, 0, 0.1);
    color: var(--color-accent-orange);
    padding: 10px 20px;
    border-radius: var(--radius-sm);
    font-weight: 700;
    font-size: 0.9rem;
    transition: var(--transition-smooth);
    border: none;
    cursor: pointer;
}


.btn-pdf-view:hover {
    background-color: var(--color-accent-orange);
    color: var(--color-white);
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2rem;
    }
    .hero-actions {
        flex-direction: column;
        gap: 12px;
    }
    .section-title {
        font-size: 1.8rem;
    }
    .register-info h2 {
        font-size: 1.5rem;
    }
    .register-form-container {
        padding: 20px 16px;
    }
}

/* NÚT BACK TO TOP */
.back-to-top {
    position: fixed;
    bottom: 100px;
    right: 30px;
    width: 48px;
    height: 48px;
    border-radius: 50%;
    background: var(--gradient-orange);
    color: var(--color-white);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-orange);
    z-index: 1000;
    transition: var(--transition-smooth);
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px);
}

.back-to-top svg {
    width: 24px;
    height: 24px;
    transition: var(--transition-smooth);
}

.back-to-top.show {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.back-to-top:hover {
    transform: translateY(-5px) scale(1.05);
    box-shadow: 0 12px 30px rgba(255, 122, 0, 0.5);
    background: var(--color-accent-orange-hover);
}

.back-to-top:hover svg {
    transform: translateY(-2px);
}

@media (max-width: 768px) {
    .back-to-top {
        bottom: 80px;
        right: 20px;
        width: 42px;
        height: 42px;
    }
    .back-to-top svg {
        width: 20px;
        height: 20px;
    }
}

/* CHAT WIDGET */
.chat-widget-btn {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 56px;
    height: 56px;
    border-radius: 50%;
    background-color: var(--color-primary);
    color: var(--color-white);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 4px 16px rgba(11, 74, 143, 0.3);
    z-index: 1000;
    transition: var(--transition-smooth);
}

.chat-widget-btn:hover {
    transform: scale(1.08);
    background-color: var(--color-primary-light);
    box-shadow: 0 6px 20px rgba(11, 74, 143, 0.4);
}

.chat-widget-btn svg {
    width: 28px;
    height: 28px;
}

/* Cửa sổ Chatbox */
.chat-box {
    position: fixed;
    bottom: 100px;
    right: 30px;
    width: 380px;
    height: 500px;
    background-color: var(--color-white);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    overflow: hidden;
    opacity: 0;
    visibility: hidden;
    transform: translateY(20px) scale(0.95);
    transition: var(--transition-smooth);
}

.chat-box.active {
    opacity: 1;
    visibility: visible;
    transform: translateY(0) scale(1);
}

/* Header */
.chat-header {
    background-color: var(--color-primary);
    color: var(--color-white);
    padding: 16px 20px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    box-shadow: var(--shadow-sm);
}

.chat-header-info {
    display: flex;
    align-items: center;
    gap: 12px;
}

.chat-header-logo {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background-color: var(--color-white);
    padding: 2px;
    object-fit: contain;
}

.chat-header-text h3 {
    color: var(--color-white);
    font-size: 1.05rem;
    margin: 0;
    font-weight: 700;
}

.chat-header-text p {
    color: rgba(255, 255, 255, 0.8);
    font-size: 0.8rem;
    margin: 0;
}

.chat-close-btn {
    background: none;
    border: none;
    color: var(--color-white);
    font-size: 1.8rem;
    cursor: pointer;
    line-height: 1;
    padding: 0;
    opacity: 0.8;
    transition: var(--transition-smooth);
}

.chat-close-btn:hover {
    opacity: 1;
    transform: scale(1.1);
}

/* Chat Messages */
.chat-messages {
    flex: 1;
    background-color: #f4f7f6;
    padding: 20px;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: 15px;
    scroll-behavior: smooth;
}

.chat-msg {
    max-width: 85%;
    padding: 12px 16px;
    border-radius: 16px;
    font-size: 0.92rem;
    line-height: 1.5;
    word-wrap: break-word;
}

.chat-msg.bot {
    background-color: var(--color-white);
    color: var(--color-text-dark);
    align-self: flex-start;
    border-bottom-left-radius: 4px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.chat-msg.user {
    background-color: var(--color-primary);
    color: var(--color-white);
    align-self: flex-end;
    border-bottom-right-radius: 4px;
    box-shadow: 0 2px 8px rgba(11, 74, 143, 0.15);
}

.chat-msg p {
    margin: 0;
}

.chat-msg.bot strong {
    color: var(--color-primary);
}

/* Typing indicator */
.typing-indicator {
    display: flex;
    gap: 4px;
    padding: 12px 16px;
    background-color: var(--color-white);
    align-self: flex-start;
    border-radius: 12px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.04);
}

.typing-indicator span {
    width: 6px;
    height: 6px;
    background-color: var(--color-primary);
    border-radius: 50%;
    animation: typing 1.4s infinite ease-in-out both;
}

.typing-indicator span:nth-child(2) {
    animation-delay: .2s;
}

.typing-indicator span:nth-child(3) {
    animation-delay: .4s;
}

@keyframes typing {
    0%, 80%, 100% { transform: scale(0); }
    40% { transform: scale(1); }
}

/* Quick Suggestions */
.chat-suggestions {
    background-color: #f4f7f6;
    padding: 10px 20px 15px;
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.05);
}

.chat-suggest-btn {
    background-color: var(--color-white);
    border: 1px solid rgba(11, 74, 143, 0.25);
    color: var(--color-primary);
    padding: 8px 16px;
    border-radius: 20px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition-smooth);
}

.chat-suggest-btn:hover {
    background-color: rgba(11, 74, 143, 0.05);
    border-color: var(--color-primary);
    transform: translateY(-1px);
}

/* Chat Input */
.chat-input-area {
    padding: 15px 20px;
    background-color: var(--color-white);
    display: flex;
    align-items: center;
    gap: 12px;
}

.chat-input {
    flex: 1;
    border: 1px solid #e2e8f0;
    border-radius: 24px;
    padding: 12px 18px;
    font-size: 0.92rem;
    outline: none;
    transition: var(--transition-smooth);
    background-color: #f8fafc;
}

.chat-input:focus {
    border-color: var(--color-primary);
    background-color: var(--color-white);
    box-shadow: 0 0 0 3px rgba(11, 74, 143, 0.1);
}

.chat-send-btn {
    width: 44px;
    height: 44px;
    border-radius: 50%;
    background-color: var(--color-primary);
    color: var(--color-white);
    border: none;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    box-shadow: 0 2px 8px rgba(11, 74, 143, 0.2);
    transition: var(--transition-smooth);
}

.chat-send-btn:hover {
    background-color: var(--color-primary-light);
    transform: scale(1.05);
}

.chat-send-btn svg {
    width: 20px;
    height: 20px;
}

/* Mobile responsive for chat */
@media (max-width: 480px) {
    .chat-box {
        bottom: 0;
        right: 0;
        width: 100%;
        height: 100%;
        border-radius: 0;
        z-index: 2001;
    }
    
    .chat-widget-btn {
        bottom: 20px;
        right: 20px;
        width: 48px;
        height: 48px;
    }

    .chat-widget-btn svg {
        width: 24px;
        height: 24px;
    }
}