/* ===========================================================
     1. BIẾN MÀU THƯƠNG HIỆU 
     =========================================================== */
:root {
    --color-primary: #0b0e17;
    /* nền tối chủ đạo (navy gần đen) */
    --color-secondary: #31b6c8;
    /* accent xanh lime - CTA, điểm nhấn */
    --color-dark: #05060b;
    /* nền tối nhất / chữ tối           */
    --color-gray: #9099aa;
    /* chữ phụ, mô tả                   */
    --color-white: #ffffff;

    --font-base: "Inter", system-ui, -apple-system, sans-serif;
    --radius-base: 0;
    --shadow-base: 0 24px 56px -24px rgba(6, 11, 22, 0.35);
    --transition-base: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===========================================================
     2. BIẾN THEO THEME — DARK (mặc định) / LIGHT
     =========================================================== */
:root[data-theme="dark"] {
    --surface-page: var(--color-dark);
    --surface-alt: #0c1424;
    --surface-card: #111a2e;
    --surface-nav: #080d18;
    --text-heading-color: var(--color-white);
    --text-body-color: #b9babd;
    --border-base-color: rgba(255, 255, 255, 0.2);
}

:root[data-theme="light"] {
    --surface-page: var(--color-white);
    --surface-alt: #f4f6fa;
    --surface-card: var(--color-white);
    --surface-nav: var(--color-white);
    --text-heading-color: var(--color-dark);
    --text-body-color: var(--color-gray);
    --border-base-color: #e3e7ef;
}

* {
    box-sizing: border-box;
}

a {
    text-decoration: none;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-base);
    color: var(--text-heading-color);
    background: var(--surface-page);
    transition:
        background 0.3s ease,
        color 0.3s ease;
}

/* ===========================================================
     3. CLASS TYPOGRAPHY DÙNG CHUNG
     =========================================================== */
.heading {
    font-family: var(--font-base);
    font-weight: 800;
    font-size: clamp(1.9rem, 3.1vw, 2.8rem);
    line-height: 1.16;
    letter-spacing: -0.02em;
    color: var(--text-heading-color);
    margin-bottom: 1rem;
}

.sub-heading {
    font-family: var(--font-base);
    font-weight: 700;
    letter-spacing: 0.1em;
    text-transform: uppercase;
    font-size: 0.78rem;
    color: var(--color-secondary);
    margin-bottom: 0.7rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.sub-heading::before {
    content: "";
    width: 18px;
    height: 2px;
    background: var(--color-secondary);
    display: inline-block;
}

.title {
    font-family: var(--font-base);
    font-weight: 700;
    font-size: 1.08rem;
    line-height: 1.4;
    color: var(--text-heading-color);
    margin-bottom: 0.5rem;
}

.text-base {
    font-family: var(--font-base);
    font-weight: 400;
    font-size: 0.96rem;
    line-height: 1.7;
    color: var(--text-body-color);
}

/* ===========================================================
     4. LAYOUT CHUNG
     =========================================================== */
.section-padding {
    padding: 5.5rem 0;
}

@media (max-width: 767px) {
    .section-padding {
        padding: 3.2rem 0;
    }
}

.bg-surface-alt {
    background: var(--surface-alt);
}

.feature-anchor-offset {
    scroll-margin-top: 90px;
}

.button-primary {
    background: var(--color-secondary);
    color: var(--color-white);
    border: 1px solid var(--color-secondary);
    border-radius: 50px;
    padding: 0.85rem 1.8rem;
    font-weight: 700;
    font-size: 0.88rem;
    transition: var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
}

.button-primary:hover {
    filter: brightness(1.1);
}

.button-outline {
    background: transparent;
    color: var(--text-heading-color);
    border: 1px solid var(--color-gray);
    border-radius: 50px;
    padding: 0.85rem 1.8rem;
    font-weight: 700;
    font-size: 0.88rem;
    transition: var(--transition-base);
}

.button-outline:hover {
    background: var(--text-heading-color);
    color: var(--surface-page);
    border-color: var(--text-heading-color);
}

/* ===========================================================
     5. ĐA NGÔN NGỮ — ẩn/hiện theo lang hiện tại
     =========================================================== */
[data-lang="en"] {
    display: none;
}

html[data-active-lang="en"] [data-lang="en"] {
    display: inline;
}

html[data-active-lang="en"] [data-lang="vi"] {
    display: none;
}

/* ===========================================================
     6. SWITCH PILL DÙNG CHUNG (ngôn ngữ + theme)
     =========================================================== */
.switch-pill-group {
    display: flex;
    align-items: center;
    border: 1px solid var(--border-base-color);
    border-radius: 50px;
    padding: 0.2rem;
    gap: 0.2rem;
}

.switch-pill-button {
    background: transparent;
    border: none;
    color: var(--text-body-color);
    font-weight: 700;
    font-size: 0.76rem;
    letter-spacing: 0.03em;
    padding: 0.35rem 0.7rem;
    border-radius: 50px;
    transition: var(--transition-base);
}

.switch-pill-button.active-pill {
    background: var(--color-secondary);
    color: var(--color-white);
}

/* ===========================================================
     7. HEADER / NAVBAR
     =========================================================== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 1000;
    background: var(--surface-nav);
    border-bottom: 1px solid var(--border-base-color);
    transition: background 0.3s ease;
}

.site-logo {
    font-weight: 900;
    font-size: 1.2rem;
    color: var(--text-heading-color);
    letter-spacing: -0.02em;
}

.site-logo span {
    color: var(--color-secondary);

}

.navbar-brand {
    background: white;
    border-radius: 30px;
}

.navbar-brand img {
    padding: 15px 30px;
    border-radius: 50px;
    max-height: 60px;
}

.nav-link-base {
    font-weight: 600;
    font-size: 0.86rem;
    color: var(--text-heading-color) !important;
    padding: 0.5rem 0.8rem !important;
    transition: var(--transition-base);
}

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

.nav-dropdown-menu {
    background: var(--surface-card);
    border: 1px solid var(--border-base-color);
    border-radius: var(--radius-base);
    box-shadow: var(--shadow-base);
    padding: 0.6rem;
}

.nav-dropdown-menu .dropdown-item {
    border-radius: 10px;
    padding: 0.55rem 0.8rem;
    font-weight: 600;
    font-size: 0.84rem;
    color: var(--text-heading-color);
}

.nav-dropdown-menu .dropdown-item:hover {
    background: var(--surface-alt);
    color: var(--color-secondary);
}

.nav-dropdown-label {
    font-size: 0.68rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    color: var(--text-body-color);
    padding: 0.5rem 0.8rem 0;
}

/* ===========================================================
     8. PAGE INTRO SECTION (không dùng class hero, không full-bleed)
     =========================================================== */
.page-intro-section {
    padding: 4rem 0 3rem;
    background-image: linear-gradient(to bottom left, rgba(35 30 28/.50), rgba(35 30 28/1)),
        url(.././images/banner-top.jpg);
    background-size: cover;
    background-position: center;
    border-radius: 0 0 12px 12px;
    padding: 0 var(--x-padding) 60px var(--x-padding);
    display: flex;
    align-items: center;
    grid-template-rows: auto 1fr auto;
    width: 100%;
    height: 100vh;

}

.page-intro-content {
    max-width: 740px;
}

.page-intro-content .text-base {
    font-size: 1.02rem;
    max-width: 600px;
}

/* ===========================================================
     9. LOGO SHOWCASE — SWIPER CHẠY LIÊN TỤC (thay marquee CSS lỗi)
     =========================================================== */
.logo-showcase-section {
    padding: 2.6rem 0;
}

.logo-swiper {
    overflow: hidden;
}

.logo-swiper .swiper-wrapper {
    transition-timing-function: linear !important;
}

.logo-slide {
    width: auto !important;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 0 1.6rem;
}

.logo-slide-image {
    height: 26px;
    width: auto;
    max-width: 140px;
    object-fit: contain;
}

:root[data-theme="dark"] .logo-slide-image {
    filter: grayscale(1) brightness(2.4) opacity(0.65);
}

:root[data-theme="light"] .logo-slide-image {
    filter: grayscale(1) brightness(0.35) opacity(0.6);
}

/* ===========================================================
     10. PRODUCT TABS — Dành cho chủ đầu tư / Dành cho đại lý
     =========================================================== */
.product-tab-switcher {
    gap: 0.6rem;
}

.product-tab-button {
    border: 1px solid var(--border-base-color);
    background: transparent;
    color: var(--text-body-color);
    border-radius: 50px;
    padding: 0.7rem 1.6rem;
    font-weight: 700;
    font-size: 0.9rem;
    transition: var(--transition-base);
}

.product-tab-button:hover {
    border-color: var(--color-secondary);
    color: var(--color-secondary);
}

.product-tab-button.active-tab {
    background: var(--color-secondary);
    border-color: var(--color-secondary);
    color: var(--color-white);
}

.product-feature-row {
    padding: 3.4rem 0;
    border-bottom: 1px solid var(--border-base-color);
}

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

/* ===========================================================
     11. FEATURE POINT LIST
     =========================================================== */
.feature-point-item {
    display: flex;
    gap: 1rem;
    align-items: flex-start;
    padding: 1rem 0;
    border-bottom: 1px solid var(--border-base-color);
}

.feature-point-item:last-child {
    border-bottom: none;
}

.feature-point-icon {
    width: 42px;
    height: 42px;
    flex-shrink: 0;
    border-radius: 50%;
    background: var(--color-secondary);
    color: var(--surface-alt);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 800;
    font-size: 0.85rem;
}

.feature-media-wrap {
    position: relative;
    border-radius: var(--radius-base);
    overflow: hidden;
    box-shadow: var(--shadow-base);
    background: var(--color-dark);
    aspect-ratio: 4/3;
}

/* -------- video tuỳ chỉnh: ẩn UI mặc định, dùng nút custom -------- */
.custom-video-wrapper {
    position: relative;
    width: 100%;
    height: 100%;
    background: var(--color-dark);
}

.custom-video-wrapper video {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.custom-video-controls {
    position: absolute;
    left: 14px;
    bottom: 14px;
    z-index: 6;
    display: flex;
    gap: 0.5rem;
    opacity: 0;
    transition: opacity 0.25s ease;
}

.custom-video-wrapper:hover .custom-video-controls {
    opacity: 1;
}

.video-control-button {
    width: 38px;
    height: 38px;
    border-radius: 50%;
    border: none;
    background: rgba(6, 11, 22, 0.65);
    color: var(--color-white);
    backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 0.82rem;
    line-height: 1;
    transition: var(--transition-base);
}

.video-control-button:hover {
    background: var(--color-secondary);
}

.custom-video-wrapper:fullscreen {
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-dark);
}

.custom-video-wrapper:fullscreen video {
    width: 100%;
    height: 100%;
}

/* ===========================================================
     12. TESTIMONIALS SWIPER
     =========================================================== */
.testimonial-swiper {
    padding-bottom: 3rem;
}

.testimonial-card {
    background: var(--surface-card);
    border: 1px solid var(--border-base-color);
    border-radius: var(--radius-base);
    padding: 2rem;
    height: 100%;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-base);
}

.testimonial-stars {
    color: var(--color-secondary);
    font-size: 0.85rem;
    letter-spacing: 0.15em;
    margin-bottom: 1rem;
}

.testimonial-quote {
    flex: 1 1 auto;
    font-size: 0.95rem;
    line-height: 1.7;
    color: var(--text-heading-color);
    margin-bottom: 1.4rem;
}

.testimonial-author-row {
    border-top: 1px solid var(--border-base-color);
    padding-top: 1.2rem;
}

.testimonial-swiper .swiper-pagination-bullet {
    background: var(--color-secondary);
}

/* ===========================================================
     13. CTA BANNER
     =========================================================== */
.cta-panel {
    background: linear-gradient(120deg, var(--color-secondary), #1b3f94);
    border-radius: var(--radius-base);
    padding: 3.2rem;
    color: var(--color-white);
}

.cta-panel .heading {
    color: var(--color-white);
    margin-bottom: 0.6rem;
}

.cta-panel .text-base {
    color: rgba(255, 255, 255, 0.85);
}

/* ===========================================================
     14. FORM
     =========================================================== */
.form-control-base {
    background: var(--surface-card);
    border: 1px solid var(--color-gray);
    color: var(--text-heading-color);
    border-radius: 10px;
    padding: 0.8rem 1.1rem;
    font-size: 0.92rem;
}

.form-control-base::placeholder {
    color: var(--text-body-color);
}

.form-control-base:focus {
    box-shadow: 0 0 0 0.2rem rgba(47, 111, 237, 0.18);
    border-color: var(--color-secondary);
    background: var(--surface-card);
    color: var(--text-heading-color);
}

.form-label-base {
    font-weight: 600;
    font-size: 0.85rem;
    color: var(--text-heading-color);
    margin-bottom: 0.4rem;
    display: block;
}

/* ===========================================================
     15. FOOTER
     =========================================================== */
.site-footer {
    background: var(--color-dark);
    color: #8893a7;
}

.footer-link {
    color: #8893a7;
    text-decoration: none;
    font-size: 0.88rem;
    transition: var(--transition-base);
}

.footer-link:hover {
    color: var(--color-white);
}

.footer-divider {
    border-color: rgba(255, 255, 255, 0.08);
}