/* ==========================================================================
   REVOBRICKS MAIN STYLESHEET (CLEAN & OPTIMIZED)
   ========================================================================== */

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

/* =============================================
   1. VARIABLES & RESET
   ============================================= */
:root {
    /* Brand Colors */
    --red: #bd0000;         /* Primary Brand Red */
    --navy: #1D3F86;        /* Secondary Navy Blue */
    --dark-navy: #0f172a;   /* Dark Background */
    --dark: #0F172A;        /* Main Text Color */
    --ink: #334155;         /* Secondary Text Color */
    --gray-light: #f9f9f9;  /* Light Background */
    
    /* Dimensions */
    --header-h: 100px;
}

body {
    font-family: 'Manrope', sans-serif;
    color: var(--dark);
    overflow-x: hidden;
    padding-top: var(--header-h) !important; /* Push body down */
}

/* =============================================
   2. GLOBAL UTILITIES
   ============================================= */
.bg-dark-navy { background-color: var(--dark-navy) !important; color: white !important; }
.text-dark-navy { color: var(--dark-navy) !important; }
.text-ink { color: var(--ink) !important; }
.text-brand-red { color: var(--red) !important; }
.bg-brand-red { background-color: var(--red) !important; }
.cursor-pointer { cursor: pointer; }
.ls-2 { letter-spacing: 2px; font-size: 14px; opacity: 0.8; }
.text-justify { text-align: justify; }
.border-white-10 { border-color: rgba(255, 255, 255, 0.1) !important; }

/* =============================================
   3. HEADER & NAVBAR (DESKTOP)
   ============================================= */
.navbar {
    height: var(--header-h);
    padding: 0 !important;
    background: #fff;
    border-bottom: 1px solid #eee;
    position: fixed !important;
    top: 0; left: 0; right: 0;
    z-index: 9999 !important;
    box-shadow: 0 4px 12px rgba(0,0,0,0.08) !important;
    transition: transform 0.3s ease-in-out;
    transform: translateZ(0); will-change: transform;
}

.navbar-hidden {
    transform: translateY(-100%) !important;
    box-shadow: none !important;
}

.navbar-brand img {
    max-height: 80px; width: auto; object-fit: contain; display: block;
}

.navbar-nav .nav-item {
    height: 100%; display: flex; align-items: center;
}

.navbar-nav .nav-link {
    font-size: 15px; letter-spacing: 1px; text-transform: uppercase;
    font-weight: 500; color: var(--dark); padding: 0 15px !important;
    height: 100%; display: flex; align-items: center; transition: 0.1s;
}

.navbar-nav .nav-link:hover, .navbar-nav .nav-link.active {
    color: var(--red); background-color: var(--gray-light);
    border-bottom: 3px solid var(--red);
}

/* Desktop Menu Centering */
@media (min-width: 992px) {
    .navbar { position: relative; }
    .collapse.navbar-collapse { position: static; }
    .navbar-nav {
        position: absolute; left: 50%; transform: translateX(-50%);
        top: 0; height: 100%; margin: 0 !important; z-index: 10;
        display: flex; align-items: center; justify-content: center;
        white-space: nowrap;
    }
    
    /* Dropdown Menu Desktop */
    .navbar-nav .nav-item.dropdown { position: static !important; }
    .dropdown-menu {
        position: absolute; left: 0; right: 0; width: 100%; top: 100%;
        margin-top: 0 !important; border: none; border-top: 1px solid #eee !important;
        border-bottom: 3px solid var(--red); border-radius: 0;
        background-color: var(--gray-light); box-shadow: none !important;
        padding: 15px 0; display: none; justify-content: center;
        align-items: center; gap: 30px; flex-wrap: wrap;
    }
    .dropdown-item {
        width: auto; padding: 8px 15px; font-weight: 600; font-size: 14px;
        color: #555; background: transparent; position: relative;
    }
    .dropdown-item:hover {
        background: transparent; color: var(--red); padding-left: 15px;
    }
    .nav-item.dropdown:hover .dropdown-menu {
        display: flex; animation: slideDown 0.3s ease;
    }
    @keyframes slideDown { from { opacity: 0; transform: translateY(-10px); } to { opacity: 1; transform: translateY(0); } }
}

/* Header Right Actions */
.top-action-group { height: 100%; display: flex; align-items: center; }
.action-box { height: 100%; display: flex; align-items: center; justify-content: center; text-decoration: none; font-size: 1rem; transition: 0.3s; color: #fff; }
.action-box.item-1 { width: 60px; background-color: transparent; color: var(--red); border-right: 1px solid #eee; }
.action-box.item-1:hover { background-color: #f8f8f8; }
.action-box.item-2 { width: 70px; background-color: var(--red); color: white; cursor: pointer; }
.action-box.item-2:hover, .action-box.item-2[aria-expanded="true"] { background-color: var(--dark); }
.action-box.item-3 { min-width: 130px; padding: 0 20px; background-color: var(--dark); color: #fff; font-size: 0.70rem; font-weight: 500; text-transform: uppercase; letter-spacing: 0.5px; }
.action-box.item-3:hover { background-color: var(--red); }
.lang-btn { font-size: 16px; color: #2d2d2d; opacity: 0.8; transition: all 0.3s ease; display: flex; align-items: center; padding: 0 15px; }
.lang-btn:hover { color: var(--dark); opacity: 1; }

/* Header Social Dropdown */
.header-social-dropdown { background-color: var(--red) !important; border: none !important; padding: 0 !important; min-width: 70px !important; border-top: 3px solid #8a0000 !important; }
.header-social-dropdown .dropdown-item { color: #ffffff !important; padding: 12px 20px !important; font-size: 14px !important; font-weight: 500 !important; background-color: transparent !important; transition: all 0.2s ease; border-bottom: 1px solid rgba(255, 255, 255, 0.1); }
.header-social-dropdown li:last-child .dropdown-item { border-bottom: none !important; }
.header-social-dropdown .dropdown-item:hover { background-color: #9e0000 !important; padding-left: 25px !important; }
.icon-width { width: 25px; text-align: center; margin-right: 5px; }

/* =============================================
   4. HEADER & NAVBAR (MOBILE)
   ============================================= */
@media (max-width: 991px) {
    body { padding-top: 70px !important; }
    .navbar { height: 70px !important; position: fixed !important; top: 0; }
    .container-fluid { padding: 0 15px !important; }
    .right-area { display: none; }
    .navbar-brand img { max-height: 50px; }
    .mobile-icon { font-size: 15px; transition: 0.3s; text-decoration: none; color: var(--dark); }
    .mobile-icon:hover { color: var(--red) !important; }

    #mobileDropdown {
        position: absolute; top: 100%; left: 0; width: 100%; z-index: 9999;
        background-color: #fff; box-shadow: none; padding-bottom: 0px;
        max-height: calc(100vh - 70px); overflow-y: auto;
    }
    #mobileDropdown .nav-link {
        font-size: 16px; letter-spacing: 0.5px; color: var(--dark);
        padding: 12px 0 !important; padding-left: 30px !important;
        font-weight: 600; border-bottom: none;
    }
    #mobileDropdown .nav-link:hover { color: var(--red); padding-left: 0 !important; background: transparent; border: none; }
    #mobileDropdown .dropdown-menu {
        position: static !important; float: none !important; width: 100% !important;
        background: transparent !important; border: none !important; box-shadow: none !important;
        margin: 0 !important; padding-top: 0 !important; padding-bottom: 10px !important;
    }
    #mobileDropdown .dropdown-menu .nav-link {
        padding-left: 20px !important; padding-top: 8px !important; padding-bottom: 8px !important;
        font-weight: 500; font-size: 15px; color: #555;
    }

    /* Hamburger Animation */
    .custom-toggler { width: 15px; height: 15px; position: relative; display: flex; align-items: center; justify-content: center; outline: none !important; box-shadow: none !important; }
    .toggler-icon-box { width: 24px; height: 20px; display: inline-block; position: relative; }
    .toggler-icon-inner, .toggler-icon-inner::before, .toggler-icon-inner::after {
        width: 24px; height: 2px; background-color: var(--dark); border-radius: 4px;
        position: absolute; transition: transform 0.3s ease-in-out, opacity 0.2s ease-in-out;
    }
    .toggler-icon-inner { display: block; top: 50%; margin-top: -2px; }
    .toggler-icon-inner::before { content: ""; display: block; top: -8px; }
    .toggler-icon-inner::after { content: ""; display: block; bottom: -8px; }
    .custom-toggler[aria-expanded="true"] .toggler-icon-inner { background-color: transparent !important; }
    .custom-toggler[aria-expanded="true"] .toggler-icon-inner::before { top: 0; transform: rotate(45deg); background-color: var(--red); }
    .custom-toggler[aria-expanded="true"] .toggler-icon-inner::after { bottom: 0; transform: rotate(-45deg); background-color: var(--red); }
}

/* =============================================
   5. HERO CAROUSEL
   ============================================= */
.carousel-item { position: relative !important; z-index: 1; overflow: hidden; background-color: #000; }
.carousel-item img {
    position: absolute !important; top: 0; left: 0; width: 100% !important; height: 100% !important;
    object-fit: cover; z-index: 0 !important; transform: scale(1); transition: transform 6s ease-in-out; will-change: transform;
}
.carousel-item.active img { transform: scale(1.1); }
.overlay-dark {
    position: absolute !important; top: 0; left: 0; bottom: 0; right: 0; width: 100%; height: 100%;
    background: rgba(0, 0, 0, 0.6) !important; z-index: 5 !important; pointer-events: none;
}
.carousel-caption { position: absolute !important; z-index: 10 !important; bottom: 0; padding-bottom: 0; }
.carousel-caption h1, .carousel-caption p { opacity: 0; transform: translateY(50px); transition: all 0.8s ease-out; }
.carousel-item.active .carousel-caption h1 { opacity: 1; transform: translateY(0); transition-delay: 0.2s; }
.carousel-item.active .carousel-caption p { opacity: 1; transform: translateY(0); transition-delay: 0.5s; }
@media (max-width: 768px) { .carousel-caption .container { padding-left: 20px; padding-right: 20px; } }

/* =============================================
   6. TECH SECTION
   ============================================= */
.tech-section { background-color: #fff; transition: background-color 0.3s ease; }
.tech-card { background-color: #fff; border: 1px solid transparent; transition: all 0.4s cubic-bezier(0.165, 0.84, 0.44, 1); }
.tech-card:hover { transform: translateY(-10px); box-shadow: 0 20px 40px rgba(189, 0, 0, 0.1); border-color: rgba(189, 0, 0, 0.1); }
.icon-circle { width: 100px; height: 100px; border-radius: 50%; background-color: #fff; color: var(--red); border: 2px solid rgba(189, 0, 0, 0.1); transition: all 0.4s ease; }
.tech-card:hover .icon-circle { background-color: var(--red); color: #fff; border-color: var(--red); transform: rotateY(180deg); }

@media (max-width: 991px) {
    .tech-section, .tech-card { background-color: #ffffff !important; }
    .tech-card { box-shadow: none !important; border: 1px solid #e5e7eb !important; margin-bottom: 15px; }
    .tech-section h2, .tech-card h3, .tech-card .h4, .tech-section p, .tech-section .text-secondary, .icon-circle { color: var(--navy) !important; }
    .icon-circle { border-color: rgba(29, 63, 134, 0.2) !important; }
}

/* =============================================
   7. EDUCATION SECTION
   ============================================= */
.btn-outline-dark { border-color: var(--dark-navy); color: var(--dark-navy); }
.btn-outline-dark:hover { background-color: var(--dark-navy); color: #fff; }
.education-section img { object-fit: cover; object-position: center; }
@media (max-width: 991px) { .education-section img { height: 300px !important; } }

/* =============================================
   8. WHY CHOOSE US SECTION
   ============================================= */
.sticky-image-container { position: sticky; top: 20%; transition: all 0.5s ease; background: #000; }
.transition-img { transition: opacity 0.4s ease-in-out; }
.fade-out { opacity: 0.4; filter: blur(4px); }
.step-card { min-height: 60vh; opacity: 0.2; transition: all 0.5s ease; border-left-color: #e2e8f0 !important; }
.step-card.active { opacity: 1; border-left-color: var(--dark-navy) !important; }
.transition-icon { transition: transform 0.3s ease; }
.mobile-item [aria-expanded="true"] .transition-icon { transform: rotate(45deg); color: var(--red) !important; }
.mobile-item [aria-expanded="true"] { background-color: #f8f9fa !important; }

/* =============================================
   9. NEWSLETTER SECTION
   ============================================= */
.newsletter-form { width: 100% !important; max-width: 600px !important; margin: 0 auto !important; position: relative; z-index: 5; }
.minimal-input {
    -webkit-appearance: none !important; appearance: none !important; background: transparent !important; border: none !important;
    border-bottom: 2px solid rgba(255, 255, 255, 0.3) !important; border-radius: 0 !important; box-shadow: none !important;
    color: white !important; font-size: 1.3rem !important; text-align: center !important; width: 100% !important;
    padding: 15px 50px 15px 15px !important; margin: 0 !important; position: relative !important; z-index: 10 !important;
}
.minimal-input::placeholder { color: rgba(255, 255, 255, 0.5) !important; text-align: center !important; opacity: 1; }
.minimal-input:focus { outline: none !important; border-bottom-color: white !important; }
.btn-arrow-submit {
    position: absolute !important; right: 0 !important; top: 50% !important; transform: translateY(-50%) !important;
    background: transparent !important; border: none !important; padding: 10px !important; cursor: pointer !important; z-index: 20 !important;
}
.btn-arrow-submit i { color: white !important; font-size: 1.2rem; }
.fluid-heading { font-size: clamp(2rem, 5vw, 3.5rem); line-height: 1.2; }
.bg-decor-text { font-size: 15vw; font-weight: 900; color: rgba(255, 255, 255, 0.03); white-space: nowrap; pointer-events: none; user-select: none; z-index: 0; }

@media (max-width: 768px) {
    .bg-decor-text { display: none !important; }
    .group-input { position: relative !important; width: 100% !important; margin-top: 20px; }
    .minimal-input { border-bottom: 2px solid rgba(255, 255, 255, 0.5) !important; color: #cbd5e1 !important; font-size: 16px !important; padding: 10px 40px 10px 0 !important; text-align: left !important; }
    .minimal-input:focus { border-bottom-color: var(--red) !important; color: #ffffff !important; }
    .minimal-input::placeholder { color: #64748b !important; text-align: left !important; }
    .btn-arrow-submit { right: 0 !important; bottom: 8px !important; top: auto !important; transform: none !important; z-index: 100 !important; }
    .btn-arrow-submit i { color: var(--red) !important; font-size: 1.4rem !important; }
}

/* =============================================
   10. FOOTER
   ============================================= */
.site-footer { background-color: var(--dark-navy) !important; font-size: 15px; width: 100%; }
.footer-heading {
    color: #fff; font-weight: 700; text-transform: uppercase; letter-spacing: 1.5px;
    font-size: 13px; margin-bottom: 25px; display: flex; align-items: center; justify-content: space-between;
}
.footer-menu li { margin-bottom: 12px; }
.footer-menu a, .hover-white { color: #94a3b8; text-decoration: none; transition: all 0.3s ease; font-weight: 500; display: inline-block; }
.footer-menu a:hover, .hover-white:hover { color: #fff !important; transform: translateX(5px); }
.contact-info li { font-size: 0.95rem; line-height: 1.6; color: #94a3b8; }
.social-icon-clean { color: #ffffff !important; font-size: 1.2rem; text-decoration: none; opacity: 0.8; transition: opacity 0.3s ease; background: none !important; border: none !important; padding: 0; display: inline-block; }
.social-icon-clean:hover { opacity: 1; color: #ffffff !important; transform: none !important; }

@media (max-width: 991px) {
    .site-footer { text-align: left; }
    .col-lg-2.d-flex { align-items: flex-start !important; }
    .text-lg-end { text-align: left !important; }
    .footer-col { border-bottom: 1px solid rgba(255, 255, 255, 0.1); margin-bottom: 0; }
    .footer-heading { cursor: pointer; padding: 20px 0; margin-bottom: 0; font-size: 14px; }
    .footer-heading[aria-expanded="true"] .fa-chevron-down { transform: rotate(180deg); color: var(--red); }
    .footer-menu { padding: 10px 0 25px 10px; }
    .col-lg-2.footer-col { border-bottom: none; padding-top: 20px; padding-bottom: 20px; }
    .container-fluid { padding-left: 20px !important; padding-right: 20px !important; }
}

/* =============================================
   11. COOKIE BANNER
   ============================================= */
.cookie-banner {
    position: fixed; bottom: -100%; left: 0; width: 100%; z-index: 99999;
    border-top: 3px solid var(--red); transition: bottom 0.5s ease-in-out;
}
.cookie-banner.show { bottom: 0; }

/* =============================================
   12. ABOUT PAGE STYLES
   ============================================= */
.text-gradient { background: linear-gradient(to right, var(--red), var(--navy)); -webkit-background-clip: text; -webkit-text-fill-color: transparent; display: inline-block; }
.content-text { line-height: 1.8; text-align: justify; }
.content-text p { margin-bottom: 1.5rem; }
.content-text strong { color: var(--dark-navy); font-weight: 700; }
.page-banner h1 { user-select: none; pointer-events: none; }
.hero-banner-height { height: 350px; }
@media (min-width: 992px) { .hero-banner-height { height: 600px; } }
@media (max-width: 991px) {
    .about-content .display-5 { font-size: 2rem; }
    .content-text { text-align: left !important; font-size: 1rem !important; }
    .about-content .row.g-5 { gap: 2rem !important; }
    .about-content h4 { font-size: 1.3rem; margin-top: 1rem !important; }
}
/* ======================================================
   FIX LỖI ĐỒNG BỘ FOOTER (DÁN VÀO CUỐI FILE MAIN.CSS)
   ====================================================== */

/* 1. Ép dòng bản quyền (Copyright) nhỏ lại trên mọi màn hình */
.site-footer .border-top p, 
.site-footer .border-top a {
    font-size: 12px !important; /* Mặc định 12px */
    opacity: 0.8;
}

/* 2. Riêng dòng "Designed by..." cho nhỏ hơn nữa (10px) */
.site-footer .border-top .text-md-end a {
    font-size: 10px !important;
    opacity: 0.6;
}

/* 3. FIX RESPONSIVE TRÊN DI ĐỘNG (MOBILE) */
@media (max-width: 768px) {
    /* Căn giữa tất cả nội dung dòng cuối */
    .site-footer .border-top {
        text-align: center !important;
    }
    
    .site-footer .border-top .col-md-6 {
        text-align: center !important;
        margin-bottom: 5px !important; /* Tạo khoảng cách giữa 2 dòng */
    }

    /* Đảm bảo dòng Designed by không bị dính lề */
    .site-footer .border-top .text-md-end a {
        display: block; /* Xuống dòng hẳn hoi */
        margin-top: 5px;
    }
}