/* ==========================================================================
   ChamKhach CRM — main.css
   CSS thuần, không framework. Brand: #22c55e · font Be Vietnam Pro
   ========================================================================== */

:root {
  --color-primary: #22c55e;
  --color-primary-dark: #16a34a;
  --color-primary-light: #86efac;
  --color-primary-50: #f0fdf4;
  --color-primary-100: #dcfce7;
  --color-navy: #1e3a5f;
  --color-dark: #0f172a;
  --color-text: #1e293b;
  --color-muted: #64748b;
  --color-bg: #ffffff;
  --color-bg-alt: #f8fafc;
  --color-border: #e2e8f0;
  --font-main: "Be Vietnam Pro", system-ui, -apple-system, "Segoe UI", sans-serif;
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;
  --shadow-sm: 0 1px 3px rgba(15, 23, 42, .08);
  --shadow-md: 0 4px 16px rgba(15, 23, 42, .10);
  --shadow-lg: 0 8px 32px rgba(15, 23, 42, .14);
  --shadow-green: 0 10px 30px rgba(34, 197, 94, .28);
  --transition: all 0.25s ease;
  --container: 1200px;
}

/* ---------- Reset & base ---------- */
*, *::before, *::after { box-sizing: border-box; }
* { margin: 0; padding: 0; }
html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }
body {
  font-family: var(--font-main);
  font-size: 16px;
  line-height: 1.6;
  color: var(--color-text);
  background: var(--color-bg);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; transition: var(--transition); }
ul, ol { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }
h1, h2, h3, h4, h5, h6 { color: var(--color-navy); font-weight: 800; line-height: 1.2; letter-spacing: -0.02em; }
:focus-visible { outline: 3px solid rgba(34, 197, 94, .5); outline-offset: 2px; border-radius: 4px; }

/* ---------- Layout helpers ---------- */
.container { width: 100%; max-width: var(--container); margin: 0 auto; padding: 0 24px; }
.section { padding: 96px 0; }
.section-sm { padding: 64px 0; }
.section-head { max-width: 720px; margin: 0 auto 56px; text-align: center; }
.section-head .eyebrow {
  display: inline-block; font-size: .8125rem; font-weight: 700; letter-spacing: .08em;
  text-transform: uppercase; color: var(--color-primary); margin-bottom: 14px;
}
.section-head h2 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); margin-bottom: 16px; }
.section-head p { font-size: 1.0625rem; color: var(--color-muted); line-height: 1.7; }
.text-grad {
  background: linear-gradient(120deg, var(--color-primary), var(--color-primary-light));
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; color: transparent;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  font-weight: 600; font-size: 1rem; line-height: 1; padding: 14px 28px;
  border-radius: var(--radius-full); transition: var(--transition); white-space: nowrap;
  border: 2px solid transparent; cursor: pointer;
}
.btn svg { width: 18px; height: 18px; }
.btn-primary { background: var(--color-primary); color: #fff; box-shadow: var(--shadow-green); }
.btn-primary:hover { background: var(--color-primary-dark); transform: translateY(-2px); box-shadow: 0 14px 34px rgba(34,197,94,.36); }
.btn-outline { border-color: var(--color-navy); color: var(--color-navy); background: transparent; }
.btn-outline:hover { background: var(--color-navy); color: #fff; }
.btn-outline-green { border-color: var(--color-primary); color: var(--color-primary); background: transparent; }
.btn-outline-green:hover { background: var(--color-primary); color: #fff; }
.btn-ghost-light { border-color: rgba(255,255,255,.4); color: #fff; }
.btn-ghost-light:hover { background: rgba(255,255,255,.12); border-color: #fff; }
.btn-lg { padding: 18px 38px; font-size: 1.0625rem; }
.btn-block { width: 100%; }

/* ==========================================================================
   HEADER / NAVBAR
   ========================================================================== */
.site-header {
  position: sticky; top: 0; z-index: 50; width: 100%;
  background: rgba(255,255,255,.85); backdrop-filter: saturate(180%) blur(12px);
  border-bottom: 1px solid var(--color-border); transition: box-shadow .25s ease, background .25s ease;
}
.site-header.scrolled { background: #fff; box-shadow: var(--shadow-sm); border-bottom-color: transparent; }
.nav { display: flex; align-items: center; justify-content: space-between; height: 72px; }
.nav-logo img { display: block; width: auto; }
.nav-logo .logo-text { font-size: 1.4rem; font-weight: 800; color: var(--color-navy); }
.nav-logo .logo-text span { color: var(--color-primary); }
.nav-menu { display: flex; align-items: center; gap: 4px; }
.nav-menu a {
  display: block; padding: 8px 16px; font-weight: 500; font-size: .9688rem; color: var(--color-text);
  border-radius: var(--radius-sm); position: relative;
}
.nav-menu a::after {
  content: ""; position: absolute; left: 16px; right: 16px; bottom: 2px; height: 2px;
  background: var(--color-primary); border-radius: 2px; transform: scaleX(0); transform-origin: left; transition: transform .25s ease;
}
.nav-menu a:hover { color: var(--color-primary); }
.nav-menu a:hover::after,
.nav-menu .current-menu-item > a::after,
.nav-menu .current_page_item > a::after,
.nav-menu a.is-active::after { transform: scaleX(1); }
.nav-menu .current-menu-item > a,
.nav-menu .current_page_item > a,
.nav-menu a.is-active { color: var(--color-primary); }
.nav-actions { display: flex; align-items: center; gap: 12px; }
.nav-collapse { display: flex; align-items: center; gap: 28px; }
.nav-actions .btn { padding: 10px 22px; font-size: .9375rem; }
.nav-toggle {
  display: none; width: 44px; height: 44px; border-radius: var(--radius-sm); align-items: center; justify-content: center;
}
.nav-toggle span { position: relative; width: 22px; height: 2px; background: var(--color-navy); border-radius: 2px; transition: var(--transition); }
.nav-toggle span::before, .nav-toggle span::after { content: ""; position: absolute; left: 0; width: 22px; height: 2px; background: var(--color-navy); border-radius: 2px; transition: var(--transition); }
.nav-toggle span::before { top: -7px; }
.nav-toggle span::after { top: 7px; }
body.menu-open .nav-toggle span { background: transparent; }
body.menu-open .nav-toggle span::before { top: 0; transform: rotate(45deg); }
body.menu-open .nav-toggle span::after { top: 0; transform: rotate(-45deg); }

/* ==========================================================================
   HERO
   ========================================================================== */
.hero {
  position: relative; overflow: hidden; color: #fff;
  background: radial-gradient(1200px 600px at 80% -10%, rgba(34,197,94,.18), transparent 60%),
              linear-gradient(135deg, #1e3a5f 0%, #0f172a 100%);
}
.hero::before {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255,255,255,.08) 1px, transparent 1px);
  background-size: 28px 28px; opacity: .5; mask-image: linear-gradient(to bottom, #000, transparent 80%);
}
.hero-inner { position: relative; display: grid; grid-template-columns: 55% 45%; gap: 48px; align-items: center; padding: 100px 0 110px; }
.hero h1 { color: #fff; font-size: clamp(2.25rem, 4.6vw, 3.25rem); line-height: 1.1; margin-bottom: 22px; }
.hero .sub { color: #cbd5e1; font-size: 1.125rem; line-height: 1.75; max-width: 560px; margin-bottom: 32px; }
.hero-cta { display: flex; flex-wrap: wrap; gap: 14px; margin-bottom: 26px; }
.hero-proof { display: flex; flex-wrap: wrap; gap: 8px 22px; color: #94a3b8; font-size: .875rem; }
.hero-proof span { display: inline-flex; align-items: center; gap: 7px; }
.hero-proof svg { width: 16px; height: 16px; color: var(--color-primary-light); }

/* Hero visual — CSS dashboard mockup */
.hero-visual { position: relative; }
.dash-card {
  background: rgba(255,255,255,.08); backdrop-filter: blur(14px); border: 1px solid rgba(255,255,255,.14);
  border-radius: var(--radius-xl); padding: 22px; box-shadow: 0 30px 60px rgba(0,0,0,.35);
}
.dash-card-head { display: flex; align-items: center; justify-content: space-between; margin-bottom: 18px; }
.dash-title { font-size: .9375rem; font-weight: 700; color: #fff; }
.dash-dot { width: 9px; height: 9px; border-radius: 50%; }
.dash-dots { display: flex; gap: 6px; }
.mini-card {
  display: flex; align-items: center; gap: 14px; padding: 14px; border-radius: var(--radius-md);
  background: rgba(255,255,255,.07); border: 1px solid rgba(255,255,255,.08); margin-bottom: 12px;
}
.mini-card:last-child { margin-bottom: 0; }
.mini-avatar { width: 42px; height: 42px; border-radius: 50%; flex: 0 0 42px; display: flex; align-items: center; justify-content: center; font-weight: 700; color: #fff; font-size: .9375rem; }
.mini-info { flex: 1; min-width: 0; }
.mini-name { font-size: .9375rem; font-weight: 600; color: #fff; }
.mini-meta { font-size: .75rem; color: #94a3b8; }
.mini-score { text-align: right; }
.score-num { font-size: 1.25rem; font-weight: 800; line-height: 1; }
.score-label { font-size: .6875rem; color: #94a3b8; }
.badge {
  display: inline-block; font-size: .6875rem; font-weight: 600; padding: 3px 10px; border-radius: var(--radius-full);
}
.badge-hot { background: rgba(34,197,94,.18); color: #86efac; }
.badge-warm { background: rgba(251,191,36,.18); color: #fcd34d; }
.badge-new { background: rgba(96,165,250,.18); color: #93c5fd; }
.hero-float {
  position: absolute; background: #fff; color: var(--color-text); border-radius: var(--radius-md);
  box-shadow: var(--shadow-lg); padding: 12px 16px; display: flex; align-items: center; gap: 10px; font-weight: 600; font-size: .875rem;
}
.hero-float .ico { width: 32px; height: 32px; border-radius: 9px; background: var(--color-primary-50); color: var(--color-primary); display: flex; align-items: center; justify-content: center; }
.hero-float .ico svg { width: 18px; height: 18px; }
.hero-float.f1 { top: -18px; left: -22px; }
.hero-float.f2 { bottom: -20px; right: -14px; }

/* ==========================================================================
   STATS BAR
   ========================================================================== */
.stats { background: var(--color-primary); color: #fff; }
.stats-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; padding: 56px 0; text-align: center; }
.stat-num { font-size: clamp(2rem, 4vw, 2.75rem); font-weight: 800; line-height: 1; letter-spacing: -.02em; }
.stat-label { margin-top: 8px; font-size: .9688rem; color: rgba(255,255,255,.9); }
.stat-item + .stat-item { border-left: 1px solid rgba(255,255,255,.2); }

/* ==========================================================================
   FEATURES
   ========================================================================== */
.features-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.feature-card {
  background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  padding: 28px; transition: var(--transition);
}
.feature-card:hover { border-color: var(--color-primary); box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.feature-icon {
  width: 52px; height: 52px; border-radius: 14px; background: var(--color-primary-50);
  color: var(--color-primary); display: flex; align-items: center; justify-content: center; margin-bottom: 18px;
}
.feature-icon svg { width: 26px; height: 26px; }
.feature-card h3 { font-size: 1.1875rem; margin-bottom: 10px; }
.feature-card p { color: var(--color-muted); font-size: .9688rem; line-height: 1.65; }

/* ==========================================================================
   SPOTLIGHT
   ========================================================================== */
.spotlight .container { display: grid; grid-template-columns: 1fr 1fr; gap: 64px; align-items: center; }
.spotlight.reverse .spot-text { order: 2; }
.spotlight.reverse .spot-visual { order: 1; }
.spot-badge {
  display: inline-block; font-size: .8125rem; font-weight: 700; padding: 6px 14px; border-radius: var(--radius-full);
  background: var(--color-primary-100); color: var(--color-primary-dark); margin-bottom: 18px;
}
.spot-text h2 { font-size: clamp(1.6rem, 3vw, 2.25rem); margin-bottom: 18px; }
.spot-text p { color: var(--color-muted); font-size: 1.0625rem; line-height: 1.75; margin-bottom: 28px; }

/* Spotlight A — extension mockup */
.ext-mock {
  background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg); overflow: hidden; max-width: 380px; margin: 0 auto;
}
.ext-head { background: var(--color-primary); color: #fff; padding: 16px 18px; display: flex; align-items: center; gap: 10px; }
.ext-head .dot { width: 36px; height: 36px; border-radius: 10px; background: rgba(255,255,255,.2); display: flex; align-items: center; justify-content: center; }
.ext-head .dot svg { width: 20px; height: 20px; }
.ext-head .t { font-weight: 700; font-size: .9375rem; }
.ext-head .s { font-size: .75rem; color: rgba(255,255,255,.85); }
.ext-body { padding: 18px; }
.ext-row { display: flex; justify-content: space-between; padding: 11px 0; border-bottom: 1px solid var(--color-border); font-size: .875rem; }
.ext-row:last-of-type { border-bottom: none; }
.ext-row .k { color: var(--color-muted); }
.ext-row .v { font-weight: 600; color: var(--color-text); }
.ext-suggest {
  margin-top: 14px; background: var(--color-primary-50); border: 1px solid var(--color-primary-100);
  border-radius: var(--radius-md); padding: 14px; font-size: .8438rem; line-height: 1.55; color: var(--color-text);
}
.ext-suggest .lbl { font-weight: 700; color: var(--color-primary-dark); display: flex; align-items: center; gap: 6px; margin-bottom: 6px; }
.ext-suggest .lbl svg { width: 15px; height: 15px; }

/* Spotlight B — chat mockup */
.chat-mock { max-width: 420px; margin: 0 auto; display: flex; flex-direction: column; gap: 12px; }
.chat-bubble {
  max-width: 78%; padding: 12px 16px; border-radius: 18px; font-size: .9063rem; line-height: 1.5; box-shadow: var(--shadow-sm);
}
.chat-bubble.them { background: #fff; border: 1px solid var(--color-border); border-bottom-left-radius: 6px; align-self: flex-start; }
.chat-bubble.me { background: var(--color-navy); color: #fff; border-bottom-right-radius: 6px; align-self: flex-end; }
.ai-result {
  background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md); padding: 18px; margin-top: 8px;
}
.ai-result .head { display: flex; align-items: center; gap: 8px; font-weight: 700; color: var(--color-primary-dark); margin-bottom: 14px; font-size: .9375rem; }
.ai-result .head svg { width: 18px; height: 18px; }
.ai-attr { display: flex; justify-content: space-between; padding: 8px 0; border-bottom: 1px dashed var(--color-border); font-size: .875rem; }
.ai-attr:last-child { border-bottom: none; }
.ai-attr .k { color: var(--color-muted); }
.ai-attr .v { font-weight: 600; }
.ai-attr .v.hot { color: var(--color-primary-dark); }

/* ==========================================================================
   PRICING
   ========================================================================== */
.pricing-toggle { display: flex; align-items: center; justify-content: center; gap: 14px; margin-bottom: 44px; }
.pricing-toggle .lbl { font-weight: 600; color: var(--color-muted); font-size: .9688rem; transition: var(--transition); }
.pricing-toggle .lbl.on { color: var(--color-navy); }
.toggle-switch { width: 54px; height: 30px; border-radius: var(--radius-full); background: var(--color-border); position: relative; transition: var(--transition); }
.toggle-switch.year { background: var(--color-primary); }
.toggle-switch::after { content: ""; position: absolute; top: 3px; left: 3px; width: 24px; height: 24px; border-radius: 50%; background: #fff; box-shadow: var(--shadow-sm); transition: var(--transition); }
.toggle-switch.year::after { left: 27px; }
.save-pill { font-size: .75rem; font-weight: 700; color: var(--color-primary-dark); background: var(--color-primary-100); padding: 3px 10px; border-radius: var(--radius-full); }

.pricing-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; align-items: start; }
.price-card {
  background: #fff; border: 1.5px solid var(--color-border); border-radius: var(--radius-lg);
  padding: 28px 24px; transition: var(--transition); position: relative; display: flex; flex-direction: column; height: 100%;
}
.price-card:hover { box-shadow: var(--shadow-md); }
.price-card.featured { border-color: var(--color-primary); border-width: 2px; box-shadow: var(--shadow-lg); transform: translateY(-6px); }
.price-card.featured:hover { transform: translateY(-9px); }
.price-pop {
  position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
  background: var(--color-primary); color: #fff; font-size: .75rem; font-weight: 700; padding: 5px 16px; border-radius: var(--radius-full); white-space: nowrap; box-shadow: var(--shadow-green);
}
.price-name { font-size: 1.0625rem; font-weight: 700; color: var(--color-navy); }
.price-tag { margin: 14px 0 4px; display: flex; align-items: baseline; gap: 4px; }
.price-amount { font-size: 2.25rem; font-weight: 800; color: var(--color-navy); letter-spacing: -.02em; }
.price-period { color: var(--color-muted); font-size: .9375rem; font-weight: 500; }
.price-desc { color: var(--color-muted); font-size: .875rem; min-height: 40px; margin-bottom: 18px; }
.price-card .btn { margin-bottom: 22px; }
.price-features { display: flex; flex-direction: column; gap: 11px; }
.price-features li { display: flex; align-items: flex-start; gap: 10px; font-size: .875rem; color: var(--color-text); line-height: 1.45; }
.price-features li svg { width: 17px; height: 17px; flex: 0 0 17px; margin-top: 1px; }
.price-features li.yes svg { color: var(--color-primary); }
.price-features li.no { color: #94a3b8; }
.price-features li.no svg { color: #cbd5e1; }

/* ==========================================================================
   TESTIMONIALS
   ========================================================================== */
.testi-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px; }
.testi-card {
  background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-lg);
  padding: 30px 28px; display: flex; flex-direction: column;
}
.testi-quote { font-family: Georgia, serif; font-size: 3rem; line-height: 1; color: var(--color-primary); height: 32px; }
.testi-text { font-size: 1rem; line-height: 1.7; color: var(--color-text); margin: 8px 0 24px; flex: 1; }
.testi-author { display: flex; align-items: center; gap: 12px; }
.testi-avatar { width: 46px; height: 46px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; color: #fff; }
.testi-name { font-weight: 700; color: var(--color-navy); font-size: .9375rem; }
.testi-role { font-size: .8125rem; color: var(--color-muted); }

/* ==========================================================================
   SECURITY
   ========================================================================== */
.security { background: var(--color-primary-50); }
.security .container { display: grid; grid-template-columns: 1fr 1fr; gap: 56px; align-items: center; }
.security-text h2 { font-size: clamp(1.6rem, 3vw, 2.25rem); margin-bottom: 18px; }
.security-text p { color: var(--color-muted); font-size: 1.0625rem; line-height: 1.75; }
.security-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
.security-card { background: #fff; border: 1px solid var(--color-primary-100); border-radius: var(--radius-lg); padding: 22px; }
.security-card .ico { width: 46px; height: 46px; border-radius: 12px; background: var(--color-primary-50); color: var(--color-primary); display: flex; align-items: center; justify-content: center; margin-bottom: 14px; }
.security-card .ico svg { width: 24px; height: 24px; }
.security-card h4 { font-size: 1rem; margin-bottom: 7px; color: var(--color-navy); }
.security-card p { font-size: .875rem; color: var(--color-muted); line-height: 1.55; }

/* ==========================================================================
   FAQ
   ========================================================================== */
.faq-wrap { max-width: 800px; margin: 0 auto; }
.faq-item { border-bottom: 1px solid var(--color-border); }
.faq-q {
  display: flex; align-items: center; justify-content: space-between; gap: 20px; width: 100%; text-align: left;
  padding: 22px 4px; font-weight: 600; font-size: 1.0625rem; color: var(--color-navy);
}
.faq-icon { flex: 0 0 24px; width: 24px; height: 24px; position: relative; transition: transform .3s ease; }
.faq-icon::before, .faq-icon::after { content: ""; position: absolute; background: var(--color-primary); border-radius: 2px; }
.faq-icon::before { top: 11px; left: 3px; right: 3px; height: 2px; }
.faq-icon::after { left: 11px; top: 3px; bottom: 3px; width: 2px; transition: transform .3s ease; }
.faq-item.open .faq-icon { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height .35s ease; }
.faq-a-inner { padding: 0 4px 24px; color: var(--color-muted); font-size: 1rem; line-height: 1.75; }

/* ==========================================================================
   FINAL CTA
   ========================================================================== */
.final-cta {
  text-align: center; color: #fff;
  background: radial-gradient(800px 400px at 50% 0%, rgba(34,197,94,.16), transparent 60%),
              linear-gradient(135deg, #1e3a5f 0%, #0f172a 100%);
}
.final-cta h2 { color: #fff; font-size: clamp(1.75rem, 3.5vw, 2.6rem); max-width: 760px; margin: 0 auto 18px; }
.final-cta p { color: #cbd5e1; font-size: 1.125rem; margin-bottom: 32px; }

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer { background: var(--color-dark); color: #cbd5e1; padding: 72px 0 0; }
.footer-grid { display: grid; grid-template-columns: 1.4fr 1fr 1fr 1.2fr; gap: 40px; padding-bottom: 56px; }
.footer-col h5 { color: #fff; font-size: .9375rem; font-weight: 700; margin-bottom: 18px; letter-spacing: .02em; }
.footer-col ul { display: flex; flex-direction: column; gap: 12px; }
.footer-col ul a { color: #94a3b8; font-size: .9375rem; }
.footer-col ul a:hover { color: var(--color-primary-light); }
.footer-brand img { filter: brightness(0) invert(1); margin-bottom: 16px; }
.footer-brand .logo-text { color: #fff; font-size: 1.4rem; font-weight: 800; margin-bottom: 16px; }
.footer-brand .logo-text span { color: var(--color-primary); }
.footer-tagline { color: #94a3b8; font-size: .9375rem; line-height: 1.65; max-width: 280px; margin-bottom: 20px; }
.footer-social { display: flex; gap: 10px; }
.footer-social a { width: 40px; height: 40px; border-radius: 10px; background: rgba(255,255,255,.06); display: flex; align-items: center; justify-content: center; color: #cbd5e1; }
.footer-social a:hover { background: var(--color-primary); color: #fff; }
.footer-social svg { width: 19px; height: 19px; }
.footer-contact li { display: flex; align-items: center; gap: 10px; color: #94a3b8; font-size: .9375rem; }
.footer-contact a { overflow-wrap: anywhere; word-break: break-word; }
.footer-contact svg { width: 16px; height: 16px; color: var(--color-primary); flex: 0 0 16px; }
.footer-bottom { border-top: 1px solid #1e293b; padding: 24px 0; text-align: center; }
.footer-bottom p { color: #64748b; font-size: .875rem; }

/* ==========================================================================
   CONTENT (page / single / archive)
   ========================================================================== */
.page-hero { background: var(--color-bg-alt); border-bottom: 1px solid var(--color-border); padding: 56px 0; }
.page-hero h1 { font-size: clamp(1.75rem, 3.5vw, 2.5rem); }
.page-hero .crumb { color: var(--color-muted); font-size: .875rem; margin-bottom: 12px; }
.page-hero .crumb a:hover { color: var(--color-primary); }
.content-layout { display: grid; grid-template-columns: 70% 30%; gap: 48px; padding: 64px 0; }
.entry-content { font-size: 1.0625rem; line-height: 1.8; color: var(--color-text); }
.entry-content > * + * { margin-top: 1.25em; }
.entry-content h2 { font-size: 1.6rem; margin-top: 1.8em; }
.entry-content h3 { font-size: 1.3rem; margin-top: 1.6em; }
.entry-content a { color: var(--color-primary-dark); text-decoration: underline; text-underline-offset: 3px; }
.entry-content ul, .entry-content ol { padding-left: 1.4em; }
.entry-content ul { list-style: disc; }
.entry-content ol { list-style: decimal; }
.entry-content li + li { margin-top: .5em; }
.entry-content img { border-radius: var(--radius-md); }
.entry-content blockquote { border-left: 4px solid var(--color-primary); padding: 4px 0 4px 20px; color: var(--color-muted); font-style: italic; }
.entry-content code { background: var(--color-bg-alt); padding: 2px 7px; border-radius: 6px; font-size: .9em; }
.entry-content pre { background: var(--color-dark); color: #e2e8f0; padding: 18px; border-radius: var(--radius-md); overflow-x: auto; }
.entry-meta { display: flex; flex-wrap: wrap; gap: 8px 18px; color: var(--color-muted); font-size: .9063rem; margin-bottom: 20px; }
.entry-meta span { display: inline-flex; align-items: center; gap: 6px; }
.entry-meta svg { width: 15px; height: 15px; color: var(--color-primary); }
.entry-thumb { border-radius: var(--radius-lg); overflow: hidden; margin-bottom: 28px; }
.cat-pill { display: inline-block; background: var(--color-primary-50); color: var(--color-primary-dark); font-size: .75rem; font-weight: 700; padding: 4px 12px; border-radius: var(--radius-full); }
.entry-tags { display: flex; flex-wrap: wrap; gap: 8px; margin-top: 36px; padding-top: 28px; border-top: 1px solid var(--color-border); }
.entry-tags a { background: var(--color-bg-alt); border: 1px solid var(--color-border); color: var(--color-muted); font-size: .8125rem; padding: 5px 12px; border-radius: var(--radius-full); }
.entry-tags a:hover { border-color: var(--color-primary); color: var(--color-primary); }

.sidebar .widget { background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-lg); padding: 24px; margin-bottom: 24px; }
.sidebar .widget-title { font-size: 1.0625rem; font-weight: 700; color: var(--color-navy); margin-bottom: 16px; padding-bottom: 12px; border-bottom: 2px solid var(--color-primary-100); }
.sidebar ul { display: flex; flex-direction: column; gap: 10px; }
.sidebar ul a { color: var(--color-text); font-size: .9375rem; }
.sidebar ul a:hover { color: var(--color-primary); }

/* Blog archive cards */
.archive-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px; padding: 64px 0; }
.post-card { background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-lg); overflow: hidden; transition: var(--transition); display: flex; flex-direction: column; }
.post-card:hover { box-shadow: var(--shadow-lg); transform: translateY(-4px); }
.post-card .thumb { aspect-ratio: 16/9; overflow: hidden; background: var(--color-bg-alt); }
.post-card .thumb img { width: 100%; height: 100%; object-fit: cover; }
.post-card .body { padding: 22px; display: flex; flex-direction: column; flex: 1; }
.post-card h3 { font-size: 1.1875rem; margin: 12px 0 10px; line-height: 1.35; }
.post-card h3 a:hover { color: var(--color-primary); }
.post-card .excerpt { color: var(--color-muted); font-size: .9375rem; line-height: 1.6; flex: 1; }
.post-card .more { margin-top: 16px; color: var(--color-primary-dark); font-weight: 600; font-size: .9375rem; display: inline-flex; align-items: center; gap: 6px; }

.pagination { display: flex; justify-content: center; gap: 8px; padding-bottom: 64px; }
.pagination a, .pagination .current { display: flex; align-items: center; justify-content: center; min-width: 42px; height: 42px; padding: 0 12px; border-radius: var(--radius-sm); border: 1px solid var(--color-border); font-weight: 600; color: var(--color-text); }
.pagination a:hover { border-color: var(--color-primary); color: var(--color-primary); }
.pagination .current { background: var(--color-primary); border-color: var(--color-primary); color: #fff; }

/* 404 + search */
.error-404 { text-align: center; padding: 120px 0; }
.error-404 .big { font-size: clamp(5rem, 14vw, 9rem); font-weight: 800; line-height: 1; background: linear-gradient(120deg, var(--color-primary), var(--color-navy)); -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent; }
.error-404 h1 { font-size: 1.75rem; margin: 12px 0 14px; }
.error-404 p { color: var(--color-muted); max-width: 460px; margin: 0 auto 28px; }
.search-form { display: flex; gap: 8px; max-width: 440px; }
.search-form input[type="search"] { flex: 1; padding: 13px 18px; border: 1.5px solid var(--color-border); border-radius: var(--radius-full); font-family: inherit; font-size: 1rem; outline: none; transition: var(--transition); }
.search-form input[type="search"]:focus { border-color: var(--color-primary); }
.search-form button { padding: 13px 26px; }

/* ==========================================================================
   RESPONSIVE
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-inner { grid-template-columns: 1fr; gap: 56px; padding: 72px 0 84px; }
  .hero .sub { max-width: none; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .pricing-grid { grid-template-columns: repeat(2, 1fr); }
  .testi-grid { grid-template-columns: 1fr; }
  .archive-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 900px) {
  .spotlight .container, .security .container { grid-template-columns: 1fr; gap: 40px; }
  .spotlight.reverse .spot-text { order: 1; }
  .spotlight.reverse .spot-visual { order: 2; }
  .content-layout { grid-template-columns: 1fr; gap: 40px; }
}
@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .nav-toggle { display: flex; }
  .nav-collapse {
    display: none; position: fixed; top: 72px; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 6px;
    background: #fff; padding: 14px 16px calc(16px + env(safe-area-inset-bottom));
    box-shadow: var(--shadow-lg); border-top: 1px solid var(--color-border);
    max-height: calc(100vh - 72px); overflow-y: auto;
  }
  body.menu-open .nav-collapse { display: flex; }
  .nav-collapse .nav-menu { display: flex; flex-direction: column; align-items: stretch; gap: 2px; width: 100%; }
  .nav-collapse .nav-menu a { padding: 14px 16px; border-radius: var(--radius-sm); }
  .nav-collapse .nav-menu a::after { display: none; }
  .nav-collapse .nav-menu a:hover,
  .nav-collapse .nav-menu .current-menu-item > a { background: var(--color-primary-50); }
  .nav-collapse .nav-actions { display: flex; flex-direction: column; gap: 10px; width: 100%; margin-top: 10px; }
  .nav-collapse .nav-actions .btn { width: 100%; }
  .footer-grid { grid-template-columns: repeat(2, 1fr); gap: 32px 28px; }
  .stats-grid { grid-template-columns: repeat(2, 1fr); gap: 36px 24px; }
  .stat-item:nth-child(odd) { border-left: none; }
  .stat-item:nth-child(3) { border-top: 1px solid rgba(255,255,255,.2); padding-top: 36px; }
  .stat-item:nth-child(4) { border-top: 1px solid rgba(255,255,255,.2); padding-top: 36px; }
  .features-grid { grid-template-columns: 1fr; }
  .pricing-grid { grid-template-columns: 1fr; }
  .price-card.featured { transform: none; }
  .security-grid { grid-template-columns: 1fr; }
  .archive-grid { grid-template-columns: 1fr; }
  .hero-float { display: none; }
}
@media (max-width: 480px) {
  .container { padding: 0 18px; }
  .hero-cta .btn { width: 100%; }
  .footer-grid { grid-template-columns: 1fr; gap: 28px; }
}

/* ==========================================================================
   AUTH — Đăng nhập / Đăng ký (split-screen)
   ========================================================================== */
.auth-wrap { min-height: 100vh; display: grid; grid-template-columns: 1.05fr 1fr; background: var(--color-bg); }

/* Brand panel (trái) */
.auth-aside {
  position: relative; overflow: hidden; color: #fff; padding: 48px 56px;
  display: flex; flex-direction: column; justify-content: space-between;
  background: radial-gradient(900px 500px at 75% -10%, rgba(34,197,94,.28), transparent 60%),
              linear-gradient(150deg, #1e3a5f 0%, #0f172a 100%);
}
.auth-aside::before {
  content: ""; position: absolute; inset: 0;
  background-image: radial-gradient(rgba(255,255,255,.08) 1px, transparent 1px);
  background-size: 26px 26px; opacity: .5; mask-image: linear-gradient(to bottom, #000, transparent 85%);
}
.auth-aside > * { position: relative; }
.auth-brand img { height: 38px; filter: brightness(0) invert(1); }
.auth-aside-mid { max-width: 440px; }
.auth-aside-mid h2 { color: #fff; font-size: clamp(1.6rem, 2.6vw, 2.15rem); line-height: 1.2; margin-bottom: 28px; }
.auth-benefits { display: flex; flex-direction: column; gap: 18px; }
.auth-benefits li { display: flex; align-items: flex-start; gap: 14px; font-size: 1.0313rem; color: #e2e8f0; line-height: 1.5; }
.auth-benefits .b-ico { flex: 0 0 38px; width: 38px; height: 38px; border-radius: 11px; background: rgba(34,197,94,.18); color: #86efac; display: flex; align-items: center; justify-content: center; }
.auth-benefits .b-ico svg { width: 20px; height: 20px; }
.auth-benefits strong { color: #fff; font-weight: 600; display: block; }
.auth-quote { background: rgba(255,255,255,.06); border: 1px solid rgba(255,255,255,.1); border-radius: var(--radius-lg); padding: 20px 22px; }
.auth-quote p { color: #e2e8f0; font-size: .9688rem; line-height: 1.6; margin-bottom: 14px; }
.auth-quote .who { display: flex; align-items: center; gap: 11px; }
.auth-quote .av { width: 40px; height: 40px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-weight: 700; color: #fff; font-size: .875rem; background: linear-gradient(135deg,#22c55e,#16a34a); }
.auth-quote .nm { color: #fff; font-weight: 700; font-size: .875rem; }
.auth-quote .rl { color: #94a3b8; font-size: .8125rem; }

/* Form panel (phải) */
.auth-main { display: flex; align-items: center; justify-content: center; padding: 48px 32px; }
.auth-card { width: 100%; max-width: 420px; }
.auth-topbar { display: none; margin-bottom: 28px; }
.auth-topbar img { height: 36px; }
.auth-head { margin-bottom: 28px; }
.auth-head h1 { font-size: 1.75rem; margin-bottom: 8px; }
.auth-head p { color: var(--color-muted); font-size: .9688rem; }
.auth-head p a { color: var(--color-primary-dark); font-weight: 600; }
.auth-head p a:hover { text-decoration: underline; }

.btn-google {
  width: 100%; display: flex; align-items: center; justify-content: center; gap: 12px;
  padding: 13px 20px; border: 1.5px solid var(--color-border); border-radius: var(--radius-full);
  background: #fff; color: var(--color-text); font-weight: 600; font-size: 1rem; transition: var(--transition);
}
.btn-google:hover { border-color: #cbd5e1; box-shadow: var(--shadow-sm); background: #fcfcfd; }
.btn-google svg { width: 20px; height: 20px; flex: 0 0 20px; }

.auth-divider { display: flex; align-items: center; gap: 14px; margin: 22px 0; color: var(--color-muted); font-size: .8125rem; }
.auth-divider::before, .auth-divider::after { content: ""; flex: 1; height: 1px; background: var(--color-border); }

.auth-form { display: flex; flex-direction: column; gap: 16px; }
.auth-field { display: flex; flex-direction: column; gap: 7px; }
.auth-field label { font-size: .875rem; font-weight: 600; color: var(--color-navy); }
.auth-input {
  width: 100%; padding: 13px 16px; border: 1.5px solid var(--color-border); border-radius: var(--radius-md);
  font-family: inherit; font-size: 1rem; color: var(--color-text); background: var(--color-bg-alt); transition: var(--transition); outline: none;
}
.auth-input::placeholder { color: #94a3b8; }
.auth-input:focus { border-color: var(--color-primary); background: #fff; box-shadow: 0 0 0 4px rgba(34,197,94,.12); }
.auth-row { display: flex; align-items: center; justify-content: space-between; gap: 12px; font-size: .875rem; }
.auth-check { display: flex; align-items: center; gap: 8px; color: var(--color-muted); cursor: pointer; }
.auth-check input { width: 17px; height: 17px; accent-color: var(--color-primary); cursor: pointer; }
.auth-link { color: var(--color-primary-dark); font-weight: 600; }
.auth-link:hover { text-decoration: underline; }
.auth-form .btn { margin-top: 4px; }
.auth-terms { font-size: .8125rem; color: var(--color-muted); line-height: 1.55; }
.auth-terms a { color: var(--color-primary-dark); font-weight: 600; }
.auth-foot { margin-top: 24px; text-align: center; color: var(--color-muted); font-size: .9375rem; }
.auth-foot a { color: var(--color-primary-dark); font-weight: 600; }
.auth-foot a:hover { text-decoration: underline; }
.auth-back { display: inline-flex; align-items: center; gap: 6px; color: #94a3b8; font-size: .875rem; font-weight: 500; margin-top: 28px; }
.auth-back:hover { color: var(--color-primary); }

.auth-notice { padding: 13px 16px; border-radius: var(--radius-md); font-size: .9063rem; line-height: 1.5; margin-bottom: 20px; }
.auth-notice.err { background: #fef2f2; border: 1px solid #fecaca; color: #b91c1c; }
.auth-notice.ok { background: var(--color-primary-50); border: 1px solid var(--color-primary-100); color: var(--color-primary-dark); }

@media (max-width: 880px) {
  .auth-wrap { grid-template-columns: 1fr; }
  .auth-aside { display: none; }
  .auth-topbar { display: block; }
  .auth-main { min-height: 100vh; align-items: flex-start; padding-top: 56px; }
  .auth-back { display: none; }
}