/* ==========================================================================
   HÀN KÍNH Ô TÔ LƯU ĐỘNG — Design tokens
   Palette: đen / xanh navy đậm / trắng, điểm nhấn vàng đồng (gold) — gợi cảm
   giác "cao cấp, dành cho chủ xe sang" theo đúng yêu cầu thiết kế.
   Display type: Oswald (chắc khoẻ, đậm chất automotive)
   Body type:   Be Vietnam Pro (tối ưu tiếng Việt)
   Signature:   Đường "vết nứt" SVG dùng làm dải phân cách + minh hoạ hồi phục
   ========================================================================== */

:root {
    --c-black: #0a0e14;
    --c-navy: #0f2340;
    --c-navy-2: #16304f;
    --c-navy-soft: #1c3a5e;
    --c-white: #f5f7fa;
    --c-white-dim: #c7d0dc;
    --c-gold: #c9a227;
    --c-gold-light: #e2cf6b;
    --c-gold-2: #e6c15a;
    --c-green: #2fae66;
    --c-red: #d64545;

    --f-display: 'Oswald', sans-serif;
    --f-body: 'Be Vietnam Pro', sans-serif;

    --radius: 6px;
    --shadow-soft: 0 10px 30px rgba(0, 0, 0, .35);
}

* { box-sizing: border-box; }

html { scroll-behavior: smooth; }

body {
    font-family: var(--f-body);
    background: var(--c-black);
    color: var(--c-white);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    padding-bottom: 68px; /* chừa chỗ cho thanh hotline nổi trên mobile */
}

h1, h2, h3, h4, .display-font {
    font-family: var(--f-display);
    font-weight: 700;
    letter-spacing: .3px;
    text-transform: uppercase;
    color: var(--c-white);
}

a { color: var(--c-gold-2); text-decoration: none; }
a:hover { color: var(--c-gold); }

.eyebrow {
    font-family: var(--f-display);
    font-size: .78rem;
    letter-spacing: 3px;
    text-transform: uppercase;
    color: var(--c-gold-2);
    font-weight: 600;
    margin-bottom: .5rem;
    display: inline-block;
}

.section { padding: 64px 0; }
.section-navy { background: var(--c-navy); }
.section-black { background: var(--c-black); }
.section-title { font-size: clamp(1.6rem, 4vw, 2.4rem); margin-bottom: .75rem; }
.section-lead { color: var(--c-white-dim); max-width: 640px; }

/* Buttons */
.btn-gold {
    background: linear-gradient(135deg, var(--c-gold-2), var(--c-gold));
    color: var(--c-black);
    font-family: var(--f-display);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    border: none;
    border-radius: var(--radius);
    padding: .9rem 1.6rem;
    box-shadow: 0 8px 24px rgba(201, 162, 39, .25);
    transition: transform .15s ease, box-shadow .15s ease;
}
.btn-gold:hover { color: var(--c-black); transform: translateY(-2px); box-shadow: 0 12px 28px rgba(201, 162, 39, .35); }

.btn-outline-light-custom {
    border: 1.5px solid rgba(255,255,255,.5);
    color: var(--c-white);
    font-family: var(--f-display);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 1px;
    border-radius: var(--radius);
    padding: .85rem 1.6rem;
    background: rgba(255,255,255,.04);
}
.btn-outline-light-custom:hover { background: rgba(255,255,255,.1); color: var(--c-white); }

/* ---------------- Sticky call bar (mobile) ---------------- */
.sticky-contact-bar {
    position: fixed;
    left: 0; right: 0; bottom: 0;
    z-index: 1050;
    display: flex;
    background: var(--c-black);
    border-top: 1px solid rgba(201,162,39,.35);
}
.sticky-contact-bar a {
    flex: 1;
    text-align: center;
    padding: 14px 8px;
    font-family: var(--f-display);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: .5px;
    font-size: .9rem;
}
.sticky-contact-bar .bar-call { background: var(--c-gold); color: var(--c-black); }
.sticky-contact-bar .bar-zalo { background: var(--c-navy-2); color: var(--c-white); }

@media (min-width: 992px) {
    .sticky-contact-bar { display: none; } /* desktop dùng nav trên header thay vì thanh dưới */
    body { padding-bottom: 0; }
}

/* ---------------- Header ---------------- */
.site-header {
    background: rgba(10,14,20,.92);
    backdrop-filter: blur(6px);
    position: sticky; top: 0; z-index: 1040;
    border-bottom: 1px solid rgba(255,255,255,.06);
}
.site-header .brand { font-family: var(--f-display); font-weight: 700; color: var(--c-white); font-size: 1.15rem; letter-spacing: .5px; }
.site-header .brand span { color: var(--c-gold-2); }
.header-actions .btn-gold { padding: .55rem 1.1rem; font-size: .85rem; }

/* ---------------- Hero ---------------- */
.hero {
    position: relative;
    min-height: 86vh;
    display: flex; align-items: center;
    background: linear-gradient(180deg, rgba(10,14,20,.55), rgba(10,14,20,.92)), var(--hero-img) center/cover no-repeat;
}
.hero::after {
    content: "";
    position: absolute; inset: 0;
    background: linear-gradient(180deg, transparent 40%, var(--c-black) 100%);
}
.hero .container { position: relative; z-index: 2; }
.hero h1 { font-size: clamp(2rem, 6vw, 3.4rem); line-height: 1.15; }
.hero .sub { font-size: clamp(1.05rem, 2.4vw, 1.3rem); color: var(--c-gold-2); font-family: var(--f-display); text-transform: uppercase; letter-spacing: 1px; margin-top: .5rem; }
.hero-bullets { list-style: none; padding: 0; margin: 1.5rem 0 2rem; }
.hero-bullets li { padding: .3rem 0 .3rem 1.8rem; position: relative; color: var(--c-white-dim); }
.hero-bullets li::before { content: "✓"; position: absolute; left: 0; color: var(--c-gold); font-weight: 700; }

/* ---------------- Crack divider (signature element) ---------------- */
.crack-divider { width: 100%; height: 46px; display: block; margin: 0; }
.crack-divider path { stroke: var(--c-gold); stroke-width: 1.4; fill: none; opacity: .55; }

/* ---------------- Problem section ---------------- */
.problem-card {
    background: var(--c-navy-2);
    border-radius: var(--radius);
    padding: 1.4rem;
    height: 100%;
    border: 1px solid rgba(255,255,255,.05);
}
.problem-card .ic { font-size: 1.8rem; color: var(--c-gold-2); }
.problem-alert {
    background: rgba(214,69,69,.12);
    border: 1px solid rgba(214,69,69,.35);
    border-radius: var(--radius);
    padding: 1rem 1.3rem;
    color: #ffd7d7;
    font-family: var(--f-display);
    text-transform: uppercase;
    letter-spacing: .5px;
    font-size: .95rem;
}

/* ---------------- Compare table ---------------- */
.compare-card { border-radius: var(--radius); padding: 1.6rem; height: 100%; }
.compare-good { background: linear-gradient(160deg, var(--c-navy-2), var(--c-navy)); border: 1px solid rgba(201,162,39,.4); }
.compare-bad { background: rgba(255,255,255,.03); border: 1px solid rgba(255,255,255,.08); }
.compare-card h3 { font-size: 1.1rem; }
.compare-card ul { list-style: none; padding: 0; margin: 1rem 0 0; }
.compare-card li { padding: .35rem 0; }
.compare-good li::before { content: "✔ "; color: var(--c-gold); font-weight: 700; }
.compare-bad li::before { content: "✘ "; color: var(--c-red); font-weight: 700; }

/* ---------------- Process steps ---------------- */
.process-step { text-align: center; padding: 1rem; }
.process-step .step-num {
    width: 52px; height: 52px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    margin: 0 auto .8rem; font-family: var(--f-display); font-weight: 700;
    background: var(--c-navy-2); border: 1.5px solid var(--c-gold); color: var(--c-gold-2);
}
.process-step h4 { font-size: .95rem; margin-bottom: 0; }
.process-arrow { color: var(--c-gold); font-size: 1.4rem; opacity: .7; }

/* ---------------- Before / after gallery ---------------- */
.ba-item { border-radius: var(--radius); overflow: hidden; background: var(--c-navy-2); border: 1px solid rgba(255,255,255,.06); }
.ba-images { display: grid; grid-template-columns: 1fr 1fr; }
.ba-images figure { margin: 0; position: relative; }
.ba-images img { width: 100%; height: 160px; object-fit: cover; display: block; }
.ba-images figcaption {
    position: absolute; bottom: 6px; left: 6px;
    background: rgba(0,0,0,.65); color: var(--c-white);
    font-size: .68rem; text-transform: uppercase; letter-spacing: .5px;
    padding: 2px 8px; border-radius: 3px; font-family: var(--f-display);
}
.ba-item .ba-title { padding: .6rem .8rem; font-size: .85rem; color: var(--c-white-dim); }

/* ---------------- Pricing table ---------------- */
.price-table { width: 100%; border-collapse: collapse; overflow: hidden; border-radius: var(--radius); }
.price-table th, .price-table td { padding: .9rem 1.1rem; text-align: left; }
.price-table thead th { background: var(--c-navy-2); font-family: var(--f-display); text-transform: uppercase; letter-spacing: .5px; font-size: .85rem; color: var(--c-gold-2); }
.price-table tbody tr { border-bottom: 1px solid rgba(255,255,255,.06); }
.price-table tbody td:last-child { color: var(--c-gold-2); font-weight: 600; text-align: right; }
.price-note { font-size: .85rem; color: var(--c-white-dim); font-style: italic; }

/* ---------------- Districts ---------------- */
.district-chip {
    display: inline-block; padding: .5rem 1rem; margin: .25rem;
    background: var(--c-navy-2); border: 1px solid rgba(255,255,255,.08);
    border-radius: 999px; font-size: .88rem; color: var(--c-white-dim);
}
.district-chip:hover { border-color: var(--c-gold); color: var(--c-gold-2); }

/* ---------------- Commitments ---------------- */
.commit-item { display: flex; gap: .7rem; align-items: flex-start; padding: .6rem 0; }
.commit-item .ic { color: var(--c-gold); font-size: 1.2rem; line-height: 1.4; }

/* ---------------- Feedback / testimonials ---------------- */
.fb-card {
    background: var(--c-navy-2); border-radius: var(--radius);
    padding: 1.2rem; height: 100%; border: 1px solid rgba(255,255,255,.05);
}
.fb-card .stars { color: var(--c-gold); letter-spacing: 2px; }
.fb-card .fb-name { font-family: var(--f-display); font-size: .95rem; margin-top: .5rem; }
.fb-card .fb-source { font-size: .72rem; color: var(--c-white-dim); text-transform: uppercase; letter-spacing: .5px; }

/* ---------------- FAQ (bootstrap accordion override) ---------------- */
.accordion-custom .accordion-item { background: transparent; border: none; border-bottom: 1px solid rgba(255,255,255,.08); }
.accordion-custom .accordion-button { background: transparent; color: var(--c-white); font-family: var(--f-display); font-weight: 600; text-transform: uppercase; font-size: .95rem; letter-spacing: .5px; box-shadow: none; }
.accordion-custom .accordion-button:not(.collapsed) { color: var(--c-gold-2); background: transparent; }
.accordion-custom .accordion-button::after { filter: invert(70%) sepia(50%) saturate(500%) hue-rotate(0deg); }
.accordion-custom .accordion-body { color: var(--c-white-dim); }

/* ---------------- Final CTA ---------------- */
.final-cta {
    background: radial-gradient(ellipse at top, var(--c-navy-2), var(--c-black));
    text-align: center; padding: 70px 0;
    border-top: 1px solid rgba(201,162,39,.25);
}
.final-cta h2 { font-size: clamp(1.8rem, 5vw, 2.6rem); }

/* ---------------- Footer ---------------- */
.site-footer { background: var(--c-black); border-top: 1px solid rgba(255,255,255,.06); padding: 40px 0 100px; font-size: .88rem; color: var(--c-white-dim); }
.site-footer h5 { font-family: var(--f-display); color: var(--c-white); font-size: 1rem; text-transform: uppercase; }
@media (min-width: 992px) { .site-footer { padding-bottom: 40px; } }

/* Skeleton for lazy image */
img.lazy { background: linear-gradient(90deg, #16304f 25%, #1c3a5e 37%, #16304f 63%); background-size: 400% 100%; animation: shimmer 1.4s ease infinite; }
@keyframes shimmer { 0% { background-position: 100% 0; } 100% { background-position: 0 0; } }

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    img.lazy { animation: none; }
}

/* Focus visibility (a11y) */
a:focus-visible, button:focus-visible { outline: 2px solid var(--c-gold); outline-offset: 2px; }