/* ============================================================
   SHEETLAB.SITE — Design System
   Dùng chung cho / (home) và /template
   ============================================================ */

:root {
  /* ===== Brand — Sheetlab Green scale (50 → 900) ===== */
  --sl-green-50:  #f0fdf4;
  --sl-green-100: #dcfce7;
  --sl-green-200: #bbf7d0;
  --sl-green-300: #86efac;
  --sl-green-400: #4ade80;
  --sl-green-500: #22c55e;
  --sl-green-600: #10B981; /* Primary brand */
  --sl-green-700: #059669;
  --sl-green-800: #166534;
  --sl-green-900: #14532d;

  /* ===== Neutrals — Ink scale ===== */
  --ink-50:  #f8fafc;
  --ink-100: #f1f5f9;
  --ink-200: #e2e8f0;
  --ink-300: #cbd5e1;
  --ink-400: #94a3b8;
  --ink-500: #64748b;
  --ink-600: #475569;
  --ink-700: #334155;
  --ink-800: #1e293b;
  --ink-900: #0b1220;

  /* Warm-grey (neutral-comparison card) */
  --warm-50:  #faf7f2;
  --warm-200: #e5e0d8;

  /* ===== Semantic ===== */
  --sem-warn: #f59e0b;
  --sem-err:  #ef4444;
  --sem-info: #0ea5e9;

  /* ===== CORE DESIGN TOKENS (spec 2026-04-23) ===== */
  --primary:           #10B981;           /* Emerald — CTA chính */
  --primary-hover:     #059669;
  --bg-page:           #FFFFFF;
  --bg-surface:        #F9FAFB;           /* Section/card bg sáng */
  --bg-dark:           #111827;           /* Section dark / COD Master */
  --text-heading:      #111827;           /* Heading đen xám mạnh */
  --text-body:         #4B5563;           /* Body text */
  --text-muted:        #9CA3AF;           /* Phụ, ngày tháng */
  --danger:            #EF4444;           /* Giá gạch / cảnh báo */

  /* Dark-mode text on --bg-dark */
  --text-on-dark:         #E5E7EB;        /* Body trên nền đen */
  --text-on-dark-muted:   #9CA3AF;

  /* Component-specific tokens */
  --radius-card:       12px;
  --radius-btn:        8px;
  --shadow-card:       0 4px 6px -1px rgba(0,0,0,.1), 0 2px 4px -1px rgba(0,0,0,.06);
  --shadow-card-hover: 0 10px 20px -3px rgba(0,0,0,.12), 0 4px 6px -2px rgba(0,0,0,.05);

  /* ===== Aliases giữ tương thích code hiện tại ===== */
  --color-primary:        var(--primary);
  --color-primary-hover:  var(--primary-hover);
  --color-primary-dark:   var(--sl-green-900);
  --color-primary-light:  var(--sl-green-100);
  --color-bg-dark:        var(--bg-dark);
  --color-bg-section:     var(--bg-surface);
  --color-bg-alt:         var(--bg-surface);
  --color-text:           var(--text-heading);
  --color-text-muted:     var(--text-body);
  --color-text-dark-muted:var(--text-muted);
  --color-border:         #E5E7EB;
  --color-danger-bg:      #fef2f2;
  --color-danger-border:  #fca5a5;
  --color-danger-text:    var(--danger);

  /* ===== Spacing scale (4px base) ===== */
  --s-1: 4px;  --s-2: 8px;  --s-3: 12px;  --s-4: 16px;
  --s-5: 20px; --s-6: 24px; --s-8: 32px;  --s-10: 40px;
  --s-12: 48px; --s-16: 64px; --s-20: 80px; --s-24: 96px;

  /* ===== Radius ===== */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --radius-xl: 24px;
  --radius-pill: 9999px;

  /* ===== Shadow ===== */
  --shadow-xs:   0 1px 2px rgba(15,23,42,.04);
  --shadow-sm:   0 1px 3px rgba(15,23,42,.06), 0 1px 2px rgba(15,23,42,.04);
  --shadow-md:   0 4px 12px rgba(15,23,42,.08), 0 2px 4px rgba(15,23,42,.04);
  --shadow-lg:   0 12px 32px rgba(15,23,42,.10), 0 4px 8px rgba(15,23,42,.04);
  --shadow-glow: 0 12px 40px rgba(16,185,129,.22);

  --shadow-pop:        var(--shadow-lg);

  /* ===== Motion ===== */
  --dur-fast: 150ms;
  --dur-base: 250ms;
  --dur-slow: 400ms;
  --ease-out: cubic-bezier(.22,.61,.36,1);
  --ease-in-out: cubic-bezier(.65,.05,.36,1);

  /* ===== Typography ===== */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', ui-monospace, 'SF Mono', monospace;
}

/* ===== Accessibility: keyboard focus ring (chỉ hiện khi tab bằng bàn phím) ===== */
.sf :focus { outline: none; }
.sf a:focus-visible,
.sf button:focus-visible,
.sf input:focus-visible,
.sf textarea:focus-visible,
.sf select:focus-visible,
.sf [tabindex]:focus-visible {
  outline: 2px solid var(--sl-green-500);
  outline-offset: 2px;
  border-radius: 4px;
}

/* Tôn trọng prefers-reduced-motion */
@media (prefers-reduced-motion: reduce) {
  * { animation-duration: 0.01ms !important; animation-iteration-count: 1 !important; transition-duration: 0.01ms !important; scroll-behavior: auto !important; }
}

/* ---------- Reset scoped ---------- */
.sf *, .sf *::before, .sf *::after { box-sizing: border-box; }
/* Line-height 1.7 cho tiếng Việt (M4) */
.sf { font-family: var(--font-sans); color: var(--color-text); line-height: 1.7; }
.sf img { max-width: 100%; display: block; }
/* Heading line-height 1.2 — chặt cho display text */
.sf h1, .sf h2, .sf h3, .sf h4 { line-height: 1.2; }
/* Card body text line-height 1.65 */
.sf p, .sf li { line-height: 1.65; }

/* ---------- NAVBAR ---------- */
.sf-nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(255,255,255,.92);
  backdrop-filter: blur(10px);
  border-bottom: 1px solid var(--color-border);
}
.sf-nav__inner {
  max-width: 1200px; margin: 0 auto;
  padding: 14px 24px;
  display: flex; align-items: center; gap: 32px;
}
.sf-nav__logo {
  font-size: 20px; font-weight: 800;
  color: var(--color-text); text-decoration: none;
  display: flex; align-items: center; gap: 8px;
}
.sf-nav__logo-icon { font-size: 22px; }
.sf-nav__links {
  display: flex; gap: 26px; align-items: center;
  flex: 1;
}
.sf-nav__link {
  color: var(--color-text-muted);
  text-decoration: none; font-size: 14.5px; font-weight: 500;
  padding: 6px 0; position: relative;
  transition: color .15s;
}
.sf-nav__link:hover { color: var(--color-primary); }
.sf-nav__link.active { color: var(--color-primary); font-weight: 600; }
.sf-nav__link.active::after {
  content:''; position: absolute; left: 0; right: 0; bottom: -17px;
  height: 2px; background: var(--color-primary);
}
.sf-nav__actions { display: flex; gap: 12px; align-items: center; }
.sf-nav__login {
  display: none; /* user-nav.js renders login state via #nav-user-slot */
}
.sf-nav__cta {
  background: var(--color-primary); color: #fff;
  padding: 9px 18px; border-radius: var(--radius-md);
  font-size: 14px; font-weight: 600; text-decoration: none;
  transition: background .15s;
}
.sf-nav__cta:hover { background: var(--color-primary-hover); }

/* Login button được render động bởi user-nav.js */
.sf-nav__login-cta {
  display: inline-flex; align-items: center;
  font-size: 13px; font-weight: 600;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
  border-radius: 8px;
  padding: 6px 14px;
  text-decoration: none;
  white-space: nowrap;
  transition: background .15s, color .15s;
}
.sf-nav__login-cta:hover { background: var(--color-primary); color: #fff; }
@media (max-width: 480px) {
  .sf-nav__login-cta {
    font-size: 12px;
    padding: 5px 10px;
    border-radius: 6px;
    border-width: 1px;
  }
}

.sf-nav__hamburger {
  display: none; background: none; border: 0;
  width: 32px; height: 32px; cursor: pointer;
  flex-direction: column; justify-content: center; gap: 5px;
}
.sf-nav__hamburger span {
  display: block; width: 22px; height: 2px;
  background: var(--color-text); margin: 0 auto;
}

/* Tablet 880-1024: links thưa hơn, gap bớt — chưa thành drawer */
@media (max-width: 1024px) and (min-width: 881px) {
  .sf-nav__inner { gap: 18px; padding: 14px 20px; }
  .sf-nav__links { gap: 18px; }
  .sf-nav__link { font-size: 14px; }
  .sf-nav__cta { padding: 8px 14px; font-size: 13px; }
  .sf-nav__login { font-size: 13px; }
}

/* Hamburger drawer trigger — bump từ 860 → 880 để không bóp ở 1024 */
@media (max-width: 880px) {
  .sf-nav__inner { gap: 12px; padding: 12px 18px; }
  .sf-nav__hamburger { display: flex; z-index: 102; position: relative; }

  /* Mobile: full-screen drawer slide từ phải */
  .sf-nav__links, .sf-nav__actions {
    position: fixed; top: 0; right: 0;
    background: #fff;
    flex-direction: column;
    padding: 0;
    transform: translateX(100%);
    transition: transform .3s cubic-bezier(.4,0,.2,1);
    display: flex; /* always flex, dùng transform để hide */
    overflow-y: auto;
    border: none;
  }
  .sf-nav__links {
    top: 0; height: 100vh; width: 82%; max-width: 340px;
    padding: 72px 24px 24px;
    align-items: stretch; justify-content: flex-start;
    gap: 0;
    z-index: 101;
    box-shadow: -8px 0 32px rgba(0,0,0,.12);
  }
  .sf-nav__actions {
    /* Actions stay inline trên mobile (login + CTA), không phải drawer */
    position: static; transform: none;
    flex-direction: row; padding: 0; box-shadow: none;
    width: auto; height: auto;
    background: transparent;
    align-items: center; gap: 8px;
    margin-left: auto; margin-right: 44px;
  }
  .sf-nav__link {
    padding: 14px 8px; font-size: 16px; font-weight: 600;
    color: var(--color-text); border-bottom: 1px solid #f1f5f9;
  }
  .sf-nav__link:last-child { border-bottom: none; }
  .sf-nav__link.active { color: var(--color-primary); }
  .sf-nav__link.active::after { display: none; }

  /* Hide login text trên mobile, chỉ giữ CTA + avatar */
  .sf-nav__login { display: none; }
  .sf-nav__cta { padding: 8px 14px; font-size: 13px; max-width: 180px; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }

  /* Open state: slide drawer in */
  .sf-nav.open .sf-nav__links { transform: translateX(0); }

  /* Backdrop khi drawer mở */
  .sf-nav::before {
    content: ''; position: fixed; inset: 0;
    background: rgba(0,0,0,.45); backdrop-filter: blur(4px);
    opacity: 0; pointer-events: none;
    transition: opacity .3s ease; z-index: 100;
  }
  .sf-nav.open::before { opacity: 1; pointer-events: auto; }

  /* Hamburger animation: → X khi open */
  .sf-nav__hamburger { transition: transform .2s; }
  .sf-nav.open .sf-nav__hamburger span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
  .sf-nav.open .sf-nav__hamburger span:nth-child(2) { opacity: 0; }
  .sf-nav.open .sf-nav__hamburger span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }
  .sf-nav__hamburger span { transition: transform .2s, opacity .2s; }

  /* Body scroll lock khi nav open */
  body:has(.sf-nav.open) { overflow: hidden; }
}

/* Mobile ≤640px: nav cần tối giản — sticky bar bottom hoặc hero CTA đã có CTA */
@media (max-width: 640px) {
  .sf-nav__inner { padding: 10px 14px; gap: 8px; }
  .sf-nav__logo { font-size: 16px; gap: 6px; }
  .sf-nav__actions { margin-right: 36px; gap: 6px; align-items: center; }

  /* Ẩn CTA "Mua trọn bộ →" / "Mua 149K →" trên mobile —
     conflict với hamburger + avatar. CTA thay thế:
       - Home page: hero CTA + drawer link
       - PDP: sticky bar dưới + hero CTA */
  .sf-nav__cta { display: none; }

  /* User avatar chỉ hiện avatar, ẩn tên + caret để gọn */
  .sf-user__name,
  .sf-user__caret { display: none; }
  .sf-user__btn { padding: 2px !important; gap: 0 !important; }
}

/* Tiny phone ≤380px: thêm 1 step gọn nữa */
@media (max-width: 380px) {
  .sf-nav__inner { padding: 9px 12px; }
  .sf-nav__logo { font-size: 15px; }
  .sf-nav__logo svg { width: 26px; height: 26px; }
  .sf-nav__actions { margin-right: 32px; gap: 4px; }
  .sf-user__avatar { width: 24px !important; height: 24px !important; font-size: 10px !important; }
}

/* ---------- BUTTONS ---------- */
.sf-btn {
  display: inline-flex; align-items: center; justify-content: center;
  gap: 8px;
  padding: 12px 22px; border-radius: var(--radius-md);
  font-size: 15px; font-weight: 600;
  text-decoration: none; cursor: pointer;
  border: 0; transition: all .15s;
  font-family: inherit;
}
.sf-btn--primary { background: var(--color-primary); color: #fff; }
.sf-btn--primary:hover { background: var(--color-primary-hover); }
.sf-btn--outline-light {
  background: transparent; color: #fff; border: 1.5px solid rgba(255,255,255,.3);
}
.sf-btn--outline-light:hover { border-color: #fff; background: rgba(255,255,255,.06); }
.sf-btn--outline-green {
  background: transparent; color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}
.sf-btn--outline-green:hover { background: var(--color-primary-light); }
.sf-btn--lg { padding: 15px 28px; font-size: 16px; }
.sf-btn--block { width: 100%; }

/* ---------- SECTION WRAPPER ---------- */
.sf-section { padding: 80px 24px; }
.sf-section--dark { background: var(--color-bg-dark); color: #fff; }
.sf-section--green { background: var(--color-bg-section); }
.sf-section--alt { background: var(--color-bg-alt); }
.sf-section__inner { max-width: 1200px; margin: 0 auto; }

.sf-h2 {
  font-size: clamp(28px, 4vw, 42px);
  font-weight: 800; line-height: 1.15;
  margin: 0 0 14px; letter-spacing: -.02em;
}
.sf-section--dark .sf-h2 { color: #fff; }
.sf-label-sm {
  display: inline-block;
  color: var(--color-primary); font-size: 12px; font-weight: 700;
  letter-spacing: .1em; text-transform: uppercase; margin-bottom: 10px;
}
.sf-sub {
  color: var(--color-text-muted); font-size: 17px; line-height: 1.65;
  max-width: 620px;
}
.sf-section--dark .sf-sub { color: var(--color-text-dark-muted); }
.sf-section__head { text-align: center; margin-bottom: 56px; }
.sf-section__head .sf-sub { margin: 0 auto; }

/* ---------- HERO (light theme) ---------- */
.sf-hero {
  background: linear-gradient(180deg, #ffffff 0%, #f0fdf4 100%);
  color: var(--color-text);
  padding: 80px 24px 100px;
  position: relative;
  overflow: hidden;
}
.sf-hero::before {
  content:''; position: absolute;
  top: -250px; right: -150px; width: 600px; height: 600px;
  background: radial-gradient(circle, rgba(16,185,129,.10) 0%, transparent 70%);
  pointer-events: none;
}
.sf-hero::after {
  content:''; position: absolute;
  bottom: -200px; left: -150px; width: 500px; height: 500px;
  background: radial-gradient(circle, rgba(251,191,36,.08) 0%, transparent 70%);
  pointer-events: none;
}
.sf-hero__inner {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr 1.15fr; gap: 60px; align-items: center;
  position: relative; z-index: 1;
}
.sf-hero__badge {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 7px 14px; border-radius: var(--radius-pill);
  border: 1px solid rgba(16,185,129,.25);
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
  font-size: 12.5px; font-weight: 600;
  margin-bottom: 20px;
}
.sf-hero__h1 {
  font-size: clamp(36px, 5vw, 58px);
  font-weight: 900; line-height: 1.06;
  margin: 0 0 22px; letter-spacing: -.025em;
  color: var(--color-text);
}
.sf-hero__h1 em { color: var(--color-primary); font-style: normal; }
.sf-hero__sub {
  color: var(--color-text-muted);
  font-size: 17px; line-height: 1.7; max-width: 520px;
  margin: 0 0 32px;
}
.sf-hero__ctas { display: flex; gap: 12px; flex-wrap: wrap; }
.sf-hero__proof {
  display: flex; align-items: center; gap: 14px;
  margin-top: 40px;
}
.sf-hero__avatars { display: flex; }
.sf-hero__avatar {
  width: 36px; height: 36px; border-radius: 50%;
  border: 2.5px solid #fff;
  display: flex; align-items: center; justify-content: center;
  font-weight: 700; color: #fff; font-size: 13px;
  margin-left: -10px;
  box-shadow: 0 2px 6px rgba(0,0,0,.1);
}
.sf-hero__avatar:first-child { margin-left: 0; }
.sf-hero__proof-text { font-size: 13.5px; color: var(--color-text); line-height: 1.45; }
.sf-hero__proof-text strong { color: var(--color-text); font-weight: 700; }

/* Browser mockup — enlarged + green glow + fade-in slide */
#hero-visual {
  position: relative;
  isolation: isolate;
  overflow: visible;
  animation: sf-hero-rise 650ms var(--ease-out) both;
}
#hero-visual::before {
  content: '';
  position: absolute;
  inset: -40px -20px -60px -20px;
  background: radial-gradient(50% 45% at 60% 55%, rgba(16,185,129,.18) 0%, rgba(16,185,129,0) 70%);
  filter: blur(16px);
  z-index: -1;
  pointer-events: none;
}

/* IMAGE MODE — khi admin upload device mockup transparent
   drop-shadow filter follow alpha của PNG/WebP transparent
   → shadow bao quanh đúng silhouette laptop+phone (không phải hình chữ nhật) */
.sf-hero-visual--image .sf-hero-image,
#hero-visual.sf-hero-visual--image img {
  display: block;
  width: 100%;
  max-width: 760px;
  height: auto;
  margin: 0 auto;
  /* Drop-shadow follows transparent edges */
  filter:
    drop-shadow(0 24px 48px rgba(15,23,42,.18))
    drop-shadow(0 8px 16px rgba(16,185,129,.10));
  /* Tuyệt đối KHÔNG border-radius / box-shadow — device đã có curve riêng */
}
@media (min-width: 1024px) {
  .sf-hero-visual--image {
    /* Cho image extend 32px sang phải khỏi grid cell — ăn vào padding hero,
       không gây horizontal scroll vì .sf-hero có overflow:hidden */
    margin-right: -32px;
  }
  .sf-hero-visual--image .sf-hero-image,
  #hero-visual.sf-hero-visual--image img {
    max-width: 820px;
  }
}
@media (max-width: 860px) {
  .sf-hero-visual--image {
    margin-right: 0;
  }
  .sf-hero-visual--image .sf-hero-image,
  #hero-visual.sf-hero-visual--image img {
    max-width: 540px;
    /* Mobile: shadow nhẹ hơn để tiết kiệm GPU */
    filter:
      drop-shadow(0 16px 32px rgba(15,23,42,.15))
      drop-shadow(0 4px 8px rgba(16,185,129,.08));
  }
}
@keyframes sf-hero-rise {
  from { opacity: 0; transform: translateY(16px) scale(.98); }
  to   { opacity: 1; transform: translateY(0) scale(1); }
}
.sf-browser {
  background: #1f2937; border-radius: var(--radius-lg);
  box-shadow:
    0 30px 70px rgba(15,23,42,.28),
    0 8px 24px rgba(16,185,129,.18),
    0 0 0 1px rgba(255,255,255,.05);
  overflow: hidden;
  transform-origin: center;
}
@media (min-width: 861px) {
  .sf-browser { transform: scale(1.08); }
}
.sf-browser__bar {
  display: flex; align-items: center; gap: 8px;
  padding: 12px 16px; background: #111827;
  border-bottom: 1px solid rgba(255,255,255,.05);
}
.sf-browser__dot {
  width: 11px; height: 11px; border-radius: 50%; background: #4b5563;
}
.sf-browser__dot:nth-child(1) { background: #ef4444; }
.sf-browser__dot:nth-child(2) { background: #f59e0b; }
.sf-browser__dot:nth-child(3) { background: #10b981; }
.sf-browser__url {
  flex: 1; background: #0a0f0a; color: #9ca3af;
  padding: 5px 12px; border-radius: var(--radius-sm);
  font-size: 12px; margin-left: 12px; font-family: ui-monospace, 'SF Mono', monospace;
}
.sf-browser__body { padding: 22px; background: #0f172a; }
.sf-browser__title { color: #fff; font-weight: 700; font-size: 15px; margin-bottom: 16px; }
.sf-browser__cards { display: grid; grid-template-columns: repeat(3, 1fr); gap: 10px; margin-bottom: 16px; }
.sf-browser__mini {
  background: rgba(16,185,129,.1); border: 1px solid rgba(16,185,129,.2);
  border-radius: var(--radius-sm); padding: 12px 10px;
  text-align: center; font-size: 11px; color: #9ca3af;
}
.sf-browser__mini strong { display: block; color: #6ee7b7; font-size: 14px; margin-bottom: 2px; }
.sf-browser__chart {
  height: 80px; background: linear-gradient(180deg, rgba(16,185,129,.15) 0%, transparent 100%);
  border-radius: var(--radius-sm); margin-bottom: 14px; position: relative;
  border-bottom: 1.5px solid var(--color-primary);
}
.sf-browser__chart::after {
  content:''; position: absolute; inset: 0;
  background: url("data:image/svg+xml;utf8,<svg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 300 80' preserveAspectRatio='none'><path d='M0,70 L50,55 L100,60 L150,30 L200,40 L250,15 L300,25' fill='none' stroke='%2316a34a' stroke-width='2'/></svg>") center/100% 100% no-repeat;
}
.sf-browser__input {
  background: rgba(255,255,255,.05); border: 1px dashed rgba(16,185,129,.4);
  border-radius: var(--radius-sm); padding: 14px;
  color: #6ee7b7; font-size: 13px; text-align: center;
}
.sf-hero__tagline {
  text-align: center; margin-top: 20px;
  color: var(--color-text-muted); font-size: 13.5px; font-weight: 500;
  font-style: italic;
  letter-spacing: .005em;
}

/* Logo SVG */
.sf-logo-svg { display: inline-block; vertical-align: middle; flex-shrink: 0; }
.sf-nav__logo { line-height: 1; }
.sf-footer .sf-logo-svg rect,
.sf-footer .sf-logo-svg path { stroke: #22c55e; }
.sf-footer .sf-logo-svg rect { fill: #22c55e; }

@media (max-width: 860px) {
  .sf-hero { padding: 60px 24px; }
  .sf-hero__inner { grid-template-columns: 1fr; gap: 40px; }
}

/* ---------- TRUST BAR ---------- */
.sf-trustbar {
  background: #fff;
  border-top: 1px solid var(--color-border);
  border-bottom: 1px solid var(--color-border);
  padding: 22px 24px;
}
.sf-trustbar__inner {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: repeat(4, 1fr);
  gap: 24px; align-items: center;
}
.sf-trustbar__item {
  display: flex; align-items: center; gap: 10px;
  font-size: 14px; font-weight: 600; color: var(--color-text);
}
.sf-trustbar__icon { font-size: 22px; }
.sf-trustbar__item span { line-height: 1.35; }
@media (max-width: 860px) {
  .sf-trustbar__inner { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .sf-trustbar__item { font-size: 13px; }
}

/* ---------- ICP CARDS (Section 3) ---------- */
.sf-icp__grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px;
}
.sf-icp__card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 28px 22px;
  transition: all .2s;
  display: flex; flex-direction: column;
  position: relative;
}
.sf-icp__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg), 0 8px 24px rgba(16,185,129,.12);
  border-color: var(--sl-green-400);
}
.sf-icp__icon {
  width: 56px; height: 56px;
  display: inline-flex; align-items: center; justify-content: center;
  font-size: 28px; margin-bottom: 18px;
  background: linear-gradient(135deg, var(--sl-green-500), var(--sl-green-600));
  color: #fff;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-glow);
  transition: transform var(--dur-base) var(--ease-out);
}
.sf-icp__card:hover .sf-icp__icon {
  transform: translateY(-2px) scale(1.05);
}
.sf-icp__title {
  font-size: 17px; font-weight: 700; margin: 0 0 14px;
  line-height: 1.25;
}
.sf-icp__list { list-style: none; padding: 0; margin: 0 0 20px; flex: 1; }
.sf-icp__list li {
  font-size: 14px; color: var(--color-text-muted);
  padding: 5px 0 5px 16px;
  position: relative; line-height: 1.5;
}
.sf-icp__list li::before {
  content: '·';
  position: absolute; left: 4px;
  color: var(--color-primary); font-weight: 700;
}
.sf-icp__badge {
  position: absolute; top: 14px; right: 14px;
  background: var(--color-primary); color: #fff;
  font-size: 10.5px; font-weight: 700; padding: 3px 8px;
  border-radius: var(--radius-pill);
}
.sf-icp__cta {
  display: inline-flex; align-items: center; gap: 4px;
  color: var(--sl-green-700); font-weight: 600;
  text-decoration: none; font-size: 14px;
  align-self: flex-start;
  padding-top: 4px;
  transition: gap var(--dur-fast) var(--ease-out), color var(--dur-fast) var(--ease-out);
}
.sf-icp__cta:hover { color: var(--sl-green-800); gap: 8px; }
.sf-icp__card:hover .sf-icp__cta { gap: 8px; }
@media (max-width: 980px) {
  .sf-icp__grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 560px) {
  .sf-icp__grid { grid-template-columns: 1fr; }
}

/* ---------- COMPARE (Section 4) ---------- */
.sf-compare__grid {
  display: grid; grid-template-columns: 1fr 1fr; gap: 24px;
  max-width: 1000px; margin: 0 auto;
}
.sf-compare__card {
  padding: 32px; border-radius: var(--radius-lg);
  border: 1px solid;
}
.sf-compare__card--bad {
  background: var(--warm-50);
  border-color: var(--warm-200);
}
.sf-compare__card--good {
  background: linear-gradient(135deg, var(--sl-green-50) 0%, #ffffff 100%);
  border-color: var(--sl-green-300);
  box-shadow: 0 12px 32px rgba(16,185,129,.08);
}
.sf-compare__title {
  font-size: 18px; font-weight: 700; margin: 0 0 20px;
  padding-bottom: 16px;
  border-bottom: 1px solid rgba(0,0,0,.08);
}
.sf-compare__list { list-style: none; padding: 0; margin: 0; }
.sf-compare__list li {
  font-size: 14.5px; line-height: 1.6;
  padding: 10px 0 10px 30px;
  position: relative;
  color: var(--color-text);
}
.sf-compare__list li::before {
  position: absolute; left: 0; top: 10px;
  font-weight: 800; font-size: 15px;
}
.sf-compare__card--bad .sf-compare__list li::before {
  content: '✗'; color: var(--ink-400);
}
.sf-compare__card--bad .sf-compare__list li { color: var(--ink-600); }
.sf-compare__card--good .sf-compare__list li::before {
  content: '✓'; color: var(--sl-green-600);
}
@media (max-width: 860px) {
  .sf-compare__grid { grid-template-columns: 1fr; }
}

/* ---------- PRODUCT GRID (Section 5 + /template) ---------- */
.sf-prod__head {
  display: flex; justify-content: space-between; align-items: flex-end;
  margin-bottom: 40px; gap: 24px; flex-wrap: wrap;
}
.sf-prod__grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
  align-items: stretch;             /* Equal-height cards */
}
.sf-prod__card {
  background: var(--bg-page);
  border: none;                     /* Spec: không viền */
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: transform .2s, box-shadow .2s;
  display: flex; flex-direction: column;
  height: 100%;                     /* Equal-height trong grid */
  text-decoration: none; color: inherit;
  box-shadow: var(--shadow-card);
}
.sf-prod__card:hover {
  transform: translateY(-4px);
  box-shadow: var(--shadow-card-hover);
}
.sf-prod__thumb {
  position: relative; aspect-ratio: 16/10;
  background: linear-gradient(135deg, #f0fdf4 0%, #dcfce7 100%);
  overflow: hidden;
  isolation: isolate;
}
/* DEFAULT: cover full card — yêu cầu user upload ảnh đúng 1200x750 (16:10) */
.sf-prod__thumb img {
  position: relative; z-index: 1;
  width: 100%; height: 100%;
  object-fit: cover;
  object-position: center;
  transition: transform .35s ease;
}
.sf-prod__card:hover .sf-prod__thumb img {
  transform: scale(1.05);
}
/* Blurred backdrop CHỈ visible khi ảnh portrait (sách bìa) — fallback graceful */
.sf-prod__thumb-bg {
  position: absolute; inset: 0;
  background-size: cover; background-position: center;
  filter: blur(20px) brightness(.95) saturate(1.1);
  transform: scale(1.2);
  z-index: 0;
  display: none;            /* Default: hide (vì cover full đã đẹp) */
}
/* Khi card có data-portrait → bật blur bg + contain (cho sách cover 2:3) */
.sf-prod__card[data-cover="portrait"] .sf-prod__thumb-bg { display: block; }
.sf-prod__card[data-cover="portrait"] .sf-prod__thumb img {
  object-fit: contain;
  padding: 16px;
  filter: drop-shadow(0 6px 16px rgba(0,0,0,.2));
}
.sf-prod__thumb-empty {
  position: absolute; inset: 0;
  display: flex; align-items: center; justify-content: center;
  color: var(--color-primary); font-size: 40px; opacity: .5;
}

/* Mini dashboard mock (fallback khi chưa có coverImage) */
.sf-prod__mini {
  position: absolute;
  inset: 22px 22px 22px 22px;
  background: #fff;
  border-radius: var(--radius-md);
  padding: 14px 16px;
  box-shadow: var(--shadow-sm);
  display: flex; flex-direction: column;
  pointer-events: none;
}
.sf-prod__mini-head {
  display: flex; justify-content: space-between; align-items: baseline;
  gap: 12px;
}
.sf-prod__mini-label {
  font-size: 11px;
  color: var(--ink-500);
  font-weight: 500;
  letter-spacing: .02em;
  font-family: var(--font-mono);
  white-space: nowrap;
}
.sf-prod__mini-val {
  font-size: 18px;
  color: var(--sl-green-700);
  font-weight: 800;
  letter-spacing: -.01em;
}
.sf-prod__mini-bars {
  display: flex; gap: 3px; align-items: flex-end;
  flex: 1;
  margin-top: 8px;
  min-height: 38px;
}
.sf-prod__mini-bars > div {
  flex: 1;
  background: linear-gradient(180deg, var(--sl-green-400), var(--sl-green-600));
  border-radius: 2px 2px 0 0;
  opacity: .88;
  transition: opacity var(--dur-base) var(--ease-out), transform var(--dur-base) var(--ease-out);
  transform-origin: bottom;
}
.sf-prod__card:hover .sf-prod__mini-bars > div {
  opacity: 1; transform: scaleY(1.06);
}
/* Webapp variant */
.sf-prod__mini--webapp .sf-prod__mini-status {
  color: var(--sl-green-600);
  font-size: 10px;
  font-weight: 700;
  font-family: var(--font-mono);
  letter-spacing: .08em;
}
.sf-prod__mini-body {
  display: flex; flex-direction: column; gap: 8px;
  margin-top: 12px;
  flex: 1; justify-content: center;
}
.sf-prod__mini-row {
  display: flex; align-items: center; gap: 8px;
}
.sf-prod__mini-dot {
  width: 7px; height: 7px; border-radius: 50%;
  background: var(--sl-green-500);
  flex-shrink: 0;
  box-shadow: 0 0 0 3px rgba(16,185,129,.12);
}
.sf-prod__mini-bar-line {
  height: 6px;
  background: linear-gradient(90deg, var(--ink-200), var(--ink-100));
  border-radius: 999px;
}
.sf-prod__badges {
  position: absolute; top: 12px; left: 12px;
  display: flex; gap: 6px; flex-wrap: wrap;
  z-index: 1;
}
.sf-badge {
  font-size: 10.5px; font-weight: 700;
  padding: 4px 10px; border-radius: var(--radius-pill);
  letter-spacing: .03em;
}
.sf-badge--sheet {
  background: rgba(255,255,255,.95); color: var(--sl-green-900);
}
.sf-badge--webapp {
  background: #fde68a; color: #78350f;
}
/* Discount badge: tách riêng top-right theo spec design */
.sf-badge--discount {
  position: absolute; top: 12px; right: 12px;
  background: #FEE2E2; color: #B91C1C;           /* đỏ nhạt/đỏ đậm contrast */
  font-size: 11px; font-weight: 800;
  padding: 6px 12px; border-radius: var(--radius-pill);
  letter-spacing: .02em;
  box-shadow: 0 2px 8px rgba(239,68,68,.15);
  z-index: 2;
}
/* Nếu discount nằm trong .sf-prod__badges group thì ghi đè về relative */
.sf-prod__badges .sf-badge--discount {
  position: static; box-shadow: none;
}
.sf-prod__play {
  position: absolute; top: 12px; right: 12px;
  width: 38px; height: 38px; border-radius: 50%;
  background: rgba(0,0,0,.55); color: #fff;
  display: flex; align-items: center; justify-content: center;
  font-size: 13px; border: 2px solid rgba(255,255,255,.3);
}
/* DEPRECATED — KHÔNG dùng overlay label trên ảnh nữa (gây che) */
.sf-prod__thumb-label { display: none; }
/* Category chip mới — đặt trong body, không đè ảnh */
.sf-prod__cat {
  font-size: 11px; font-weight: 700; color: var(--primary);
  text-transform: uppercase; letter-spacing: .05em;
  margin-bottom: 6px; line-height: 1;
}
.sf-prod__body { padding: 24px; display: flex; flex-direction: column; flex: 1; gap: 0; }
.sf-prod__title {
  font-size: 15px; font-weight: 700; line-height: 1.35;
  margin: 0 0 8px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden;
}
.sf-prod__rating {
  font-size: 12.5px; color: var(--color-text-muted);
  margin-bottom: 12px;
}
.sf-prod__rating strong { color: #f59e0b; }
.sf-prod__price-row {
  display: flex; align-items: baseline; gap: 8px; flex-wrap: wrap;
  margin-bottom: 14px;
}
.sf-prod__price {
  font-size: 20px; font-weight: 800; color: var(--color-primary);
}
.sf-prod__price-old {
  font-size: 13px; color: #9ca3af; text-decoration: line-through;
}
.sf-prod__actions {
  display: grid; grid-template-columns: 1fr 1fr; gap: 8px;
  margin-top: auto;
}
.sf-prod__tagline {
  font-size: 13px; color: var(--color-text-muted);
  line-height: 1.45; margin: 0 0 10px;
  display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical;
  overflow: hidden;
}
.sf-prod__cta-single {
  margin-top: auto;
  color: var(--color-primary); font-weight: 600; font-size: 14px;
  padding-top: 10px; border-top: 1px solid var(--color-border);
  transition: gap .2s;
}
.sf-prod__card:hover .sf-prod__cta-single {
  color: var(--color-primary-hover);
}
.sf-prod__btn {
  height: 40px; border-radius: var(--radius-btn);
  font-size: 13px; font-weight: 600; cursor: pointer;
  display: flex; align-items: center; justify-content: center;
  text-decoration: none;
  transition: background-color .2s, color .2s, border-color .2s;
  font-family: inherit; border: 0;
}
.sf-prod__btn--outline {
  background: var(--bg-page); color: var(--primary);
  border: 1.5px solid var(--primary);
}
.sf-prod__btn--outline:hover { background: var(--bg-surface); border-color: var(--primary-hover); color: var(--primary-hover); }
.sf-prod__btn--primary {
  background: var(--primary); color: #fff;
}
.sf-prod__btn--primary:hover { background: var(--primary-hover); }

@media (max-width: 1100px) { .sf-prod__grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 860px)  { .sf-prod__grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px)  { .sf-prod__grid { grid-template-columns: 1fr; } }

/* Skeleton loader */
.sf-skel {
  background: linear-gradient(90deg, #eef2ef 25%, #e4e9e4 50%, #eef2ef 75%);
  background-size: 200% 100%;
  animation: sf-shimmer 1.4s infinite;
  border-radius: var(--radius-lg);
  height: 340px;
}
@keyframes sf-shimmer { 0%{background-position:200% 0} 100%{background-position:-200% 0} }

/* ---------- HOW IT WORKS (Section 6) ---------- */
.sf-how__grid {
  display: grid; grid-template-columns: repeat(3, 1fr);
  gap: 24px; position: relative;
  max-width: 1000px; margin: 0 auto;
}
/* Dashed connector line — desktop only, nối 3 step */
@media (min-width: 861px) {
  .sf-how__grid::before {
    content: '';
    position: absolute;
    top: 60px; left: 16%; right: 16%;
    height: 2px;
    background-image: linear-gradient(to right, var(--sl-green-300) 50%, transparent 50%);
    background-size: 12px 2px;
    background-repeat: repeat-x;
    z-index: 0;
  }
}
.sf-how__step {
  text-align: center; padding: 32px 20px;
  position: relative;
  z-index: 1;
}
.sf-how__num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 56px; height: 56px; border-radius: 50%;
  background: linear-gradient(135deg, var(--sl-green-500), var(--sl-green-700));
  color: #fff;
  font-size: 22px; font-weight: 800;
  margin-bottom: 18px;
  box-shadow: var(--shadow-glow);
}
.sf-how__title {
  font-size: 18px; font-weight: 700; margin: 0 0 10px;
}
.sf-how__desc {
  font-size: 14.5px; color: var(--color-text-muted); line-height: 1.6;
  margin: 0;
}
.sf-how__guarantee {
  margin: 40px auto 0; max-width: 720px;
  background: #fff;
  border: 2px solid var(--color-primary);
  border-radius: var(--radius-lg);
  padding: 24px 28px;
  display: flex; gap: 18px; align-items: flex-start;
}
.sf-how__guarantee-icon { font-size: 32px; flex-shrink: 0; }
.sf-how__guarantee h4 {
  margin: 0 0 6px; font-size: 17px; font-weight: 700;
}
.sf-how__guarantee p {
  margin: 0; font-size: 14.5px; color: var(--color-text-muted); line-height: 1.6;
}
@media (max-width: 860px) {
  .sf-how__grid { grid-template-columns: 1fr; gap: 12px; }
}

/* ---------- PRICING (Section 7) ---------- */
.sf-price__grid {
  display: grid; grid-template-columns: 1fr 1.05fr; gap: 24px;
  max-width: 920px; margin: 0 auto;
  align-items: stretch;
}
.sf-price__card {
  background: #fff;
  border: 1px solid var(--color-border);
  border-radius: var(--radius-lg);
  padding: 40px 32px;
  display: flex; flex-direction: column;
  position: relative;
}
.sf-price__card--highlight {
  border: 2px solid var(--sl-green-600);
  background: linear-gradient(180deg, var(--sl-green-50) 0%, #ffffff 45%);
  box-shadow: 0 24px 48px rgba(16,185,129,.18), 0 4px 12px rgba(16,185,129,.08);
  transform: scale(1.02);
  position: relative;
}
.sf-price__card--highlight::after {
  content: '';
  position: absolute;
  inset: -1px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, rgba(16,185,129,.2), transparent 40%);
  pointer-events: none;
  z-index: -1;
}
.sf-price__ribbon {
  position: absolute; top: -14px; left: 50%; transform: translateX(-50%);
  background: linear-gradient(135deg, #ef4444, #dc2626);
  color: #fff;
  font-size: 12px; font-weight: 700;
  padding: 7px 20px; border-radius: var(--radius-pill);
  white-space: nowrap;
  box-shadow: 0 6px 16px rgba(239,68,68,.35);
  letter-spacing: .02em;
}
.sf-price__name {
  font-size: 17px; font-weight: 700; margin: 0 0 6px;
}
.sf-price__price {
  font-size: 36px; font-weight: 900; color: var(--color-primary);
  margin: 0 0 2px; letter-spacing: -.02em;
}
.sf-price__price small {
  font-size: 15px; font-weight: 500; color: var(--color-text-muted);
}
.sf-price__price-old {
  font-size: 16px; color: #9ca3af; text-decoration: line-through;
  margin-bottom: 4px;
}
.sf-price__tagline {
  font-size: 14px; color: var(--color-text-muted); margin: 6px 0 26px;
}
.sf-price__features {
  list-style: none; padding: 0; margin: 0 0 28px;
  flex: 1;
}
.sf-price__features li {
  padding: 9px 0 9px 28px;
  font-size: 14.5px;
  position: relative;
  line-height: 1.55;
}
.sf-price__features li::before {
  content: '✓'; position: absolute; left: 0; top: 9px;
  color: var(--color-primary); font-weight: 800;
}
.sf-price__assurance {
  text-align: center;
  font-size: 13px;
  color: var(--ink-500);
  margin: 14px 0 0;
}
@media (max-width: 780px) {
  .sf-price__grid { grid-template-columns: 1fr; gap: 16px; }
  .sf-price__card--highlight { transform: none; }
}

/* ---------- CTV (Section 8) ---------- */
.sf-ctv { text-align: center; }
.sf-ctv__tiers {
  display: flex; justify-content: center; gap: 16px; flex-wrap: wrap;
  margin: 28px 0 36px;
}
.sf-ctv__tier {
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.12);
  padding: 14px 24px; border-radius: var(--radius-pill);
  color: #fff; font-size: 14.5px; font-weight: 600;
}
.sf-ctv__tier strong { color: var(--color-primary); margin-left: 4px; }

/* ---------- FOOTER ---------- */
.sf-footer { background: #111; color: #d1d5db; padding: 60px 24px 28px; }
.sf-footer__inner {
  max-width: 1200px; margin: 0 auto;
  display: grid; grid-template-columns: 1.2fr 1fr 1fr 1fr; gap: 40px;
}
.sf-footer h5 {
  color: #fff; font-size: 14px; font-weight: 700; margin: 0 0 16px;
}
.sf-footer ul { list-style: none; padding: 0; margin: 0; }
.sf-footer li { margin-bottom: 10px; }
.sf-footer a {
  color: #9ca3af; text-decoration: none; font-size: 14px;
  transition: color .15s;
}
.sf-footer a:hover { color: var(--color-primary); }
.sf-footer__brand { margin: 0; font-size: 22px; font-weight: 800; color: #fff; }
/* Tagline (L3): contrast tốt hơn */
.sf-footer__tagline { margin: 12px 0 16px; color: rgba(255,255,255,.7); font-size: 14px; line-height: 1.6; }
/* Social icons row (L2) */
.sf-footer__social { display: flex; gap: 10px; margin-top: 4px; }
.sf-footer__social a {
  width: 36px; height: 36px; border-radius: 8px;
  display: flex; align-items: center; justify-content: center;
  background: rgba(255,255,255,.08); color: rgba(255,255,255,.7);
  transition: all .2s;
}
.sf-footer__social a:hover { background: var(--color-primary); color: #fff; transform: translateY(-2px); }
.sf-footer__social svg { width: 18px; height: 18px; }
/* Contact info */
.sf-footer__contact { font-size: 13px; color: rgba(255,255,255,.55); margin-top: 12px; line-height: 1.7; }
.sf-footer__contact a { color: rgba(255,255,255,.7); text-decoration: none; }
.sf-footer__contact a:hover { color: var(--color-primary); }
.sf-footer__copy {
  max-width: 1200px; margin: 48px auto 0;
  padding-top: 24px; border-top: 1px solid rgba(255,255,255,.08);
  text-align: center; font-size: 13px; color: #6b7280;
}
@media (max-width: 860px) {
  .sf-footer__inner { grid-template-columns: 1fr 1fr; gap: 28px; }
}

/* ---------- TEMPLATE PAGE (light theme, match home hero) ---------- */
.sf-thero {
  background: linear-gradient(180deg, #ffffff 0%, #f0fdf4 100%);
  color: var(--color-text);
  padding: 56px 24px 44px; text-align: center;
  position: relative; overflow: hidden;
  border-bottom: 1px solid var(--color-border);
}
.sf-thero::before {
  content:''; position: absolute;
  top: -150px; right: -100px; width: 400px; height: 400px;
  background: radial-gradient(circle, rgba(16,185,129,.08) 0%, transparent 70%);
  pointer-events: none;
}
.sf-thero__inner { max-width: 900px; margin: 0 auto; position: relative; z-index: 1; }
.sf-thero .sf-hero__h1 { color: var(--color-text); }
.sf-thero .sf-hero__sub { color: var(--color-text-muted); }
.sf-thero__flow {
  display: flex; flex-wrap: wrap; justify-content: center; gap: 10px;
  margin: 22px 0 20px;
}
.sf-thero__step {
  background: #fff;
  border: 1px solid var(--color-border);
  color: var(--color-text);
  padding: 9px 18px; border-radius: var(--radius-pill);
  font-size: 13px; font-weight: 600;
  box-shadow: 0 1px 3px rgba(0,0,0,.04);
}
.sf-thero__arrow { color: var(--color-text-muted); align-self: center; opacity: .5; }
.sf-thero__trust {
  display: flex; justify-content: center; gap: 22px; flex-wrap: wrap;
  color: var(--color-text-muted); font-size: 13px; font-weight: 500;
}
.sf-thero__trust span { color: var(--color-primary); margin-right: 4px; font-weight: 800; }

.sf-bundlebar {
  background: #fff;
  border-bottom: 1px solid var(--color-border);
  padding: 16px 24px;
}
.sf-bundlebar__inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; align-items: center; gap: 20px; flex-wrap: wrap;
  background: linear-gradient(90deg, #fef3c7 0%, #fee2b3 100%);
  border-radius: var(--radius-lg);
  padding: 16px 22px;
  border: 1px solid #fbbf24;
}
.sf-bundlebar__icon { font-size: 28px; }
.sf-bundlebar__text { flex: 1; min-width: 200px; }
.sf-bundlebar__title { font-weight: 700; color: #78350f; margin: 0 0 2px; font-size: 15px; }
.sf-bundlebar__desc { color: #92400e; font-size: 13px; margin: 0; line-height: 1.4; }
.sf-bundlebar__price {
  font-weight: 800; color: #78350f; font-size: 18px;
}
.sf-bundlebar__save {
  background: #dc2626; color: #fff; font-size: 11px; font-weight: 700;
  padding: 3px 10px; border-radius: var(--radius-pill); margin-left: 8px;
}

.sf-filters {
  padding: 24px 24px 0; background: var(--color-bg-alt);
}
.sf-filters__inner {
  max-width: 1200px; margin: 0 auto;
  display: flex; gap: 16px; align-items: center; flex-wrap: wrap;
}
.sf-search {
  flex: 1 1 300px;
  position: relative;
}
.sf-search input {
  width: 100%; height: 44px;
  padding: 0 16px 0 40px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-md);
  font-size: 14.5px; font-family: inherit;
  background: #fff;
  transition: border-color .15s;
}
.sf-search input:focus {
  outline: 0; border-color: var(--color-primary);
}
.sf-search::before {
  content: '🔍'; position: absolute;
  left: 14px; top: 50%; transform: translateY(-50%);
  font-size: 14px; pointer-events: none;
}
.sf-tabs {
  display: flex; gap: 8px; padding: 16px 0; overflow-x: auto;
  max-width: 1200px; margin: 0 auto;
}
.sf-tab {
  padding: 9px 18px; border-radius: var(--radius-pill);
  background: #fff; border: 1.5px solid var(--color-border);
  color: var(--color-text-muted);
  font-size: 13.5px; font-weight: 600; cursor: pointer;
  white-space: nowrap; flex-shrink: 0;
  font-family: inherit; transition: .15s;
}
.sf-tab:hover { border-color: var(--color-primary); color: var(--color-primary); }
.sf-tab.active {
  background: var(--color-primary); color: #fff; border-color: var(--color-primary);
}

.sf-empty {
  text-align: center; padding: 80px 20px;
  color: var(--color-text-muted);
  grid-column: 1 / -1;
}
.sf-empty__icon { font-size: 44px; margin-bottom: 10px; }

/* ═══════════════════════════════════════════════════════════════
   GLOBAL RESPONSIVE POLISH
   Mobile-first breakpoints cho các component chưa responsive
   ═══════════════════════════════════════════════════════════════ */

/* Tablet (≤ 860px) */
@media (max-width: 860px) {
  .sf-section { padding: 56px 20px; }
  .sf-section__head { margin-bottom: 36px; }
  .sf-h2 { font-size: clamp(24px, 6vw, 32px); }
  .sf-hero { padding: 60px 20px 70px; }
  .sf-hero__h1 { font-size: clamp(30px, 7vw, 42px); }
  .sf-hero__sub { font-size: 15.5px; }
  .sf-hero__ctas { flex-direction: column; }
  .sf-hero__ctas .sf-btn { width: 100%; }
  .sf-hero__proof { flex-direction: column; align-items: flex-start; gap: 10px; }
  .sf-thero { padding: 40px 20px 32px; }
  .sf-thero__flow { gap: 6px; }
  .sf-thero__step { font-size: 12px; padding: 7px 12px; }
  .sf-thero__arrow { display: none; }
  .sf-thero__trust { gap: 14px; font-size: 12.5px; }
  .sf-trustbar__inner { grid-template-columns: repeat(2, 1fr); gap: 18px; }
  .sf-trustbar__item { font-size: 12.5px; }
  .sf-how__grid { max-width: 480px; }
  .sf-how__step { padding: 24px 16px; }
  .sf-compare__card { padding: 24px 20px; }
  .sf-ctv__tiers { gap: 10px; }
  .sf-ctv__tier { font-size: 13px; padding: 10px 18px; }
}

/* Mobile (≤ 560px) */
@media (max-width: 560px) {
  .sf-section { padding: 44px 16px; }
  .sf-nav__inner { padding: 12px 18px; gap: 8px; }
  .sf-nav__logo { font-size: 18px; }
  .sf-nav__cta { padding: 7px 14px; font-size: 13px; }
  .sf-hero { padding: 44px 18px 60px; }
  .sf-hero__inner { gap: 32px; }
  .sf-hero__h1 { font-size: clamp(28px, 8vw, 36px); line-height: 1.12; }
  .sf-hero__sub { font-size: 15px; line-height: 1.6; }
  .sf-hero__proof { margin-top: 28px; }
  .sf-hero__avatar { width: 32px; height: 32px; font-size: 12px; }
  .sf-hero__proof-text { font-size: 12.5px; }
  .sf-thero { padding: 32px 18px 28px; }
  .sf-thero__flow { margin: 16px 0 14px; }
  .sf-thero__step { font-size: 11.5px; padding: 6px 11px; }
  .sf-trustbar { padding: 18px 16px; }
  .sf-trustbar__inner { grid-template-columns: 1fr 1fr; gap: 12px; }
  .sf-trustbar__icon { font-size: 18px; }
  .sf-trustbar__item span { font-size: 12px; line-height: 1.35; }
  .sf-icp__card { padding: 22px 18px; }
  .sf-icp__icon { width: 48px; height: 48px; font-size: 24px; margin-bottom: 14px; }
  .sf-icp__title { font-size: 16px; }
  .sf-compare__card { padding: 20px 16px; }
  .sf-compare__list li { font-size: 13.5px; padding: 8px 0 8px 26px; }
  .sf-how__guarantee { padding: 20px 18px; }
  .sf-how__guarantee-icon { font-size: 26px; }
  .sf-price__card { padding: 28px 22px; }
  .sf-price__price { font-size: 30px; }
  .sf-price__features li { font-size: 14px; }
  .sf-browser__body { padding: 16px; }
  .sf-browser__cards { gap: 6px; }
  .sf-browser__mini { font-size: 10px; padding: 10px 8px; }
  .sf-browser__mini strong { font-size: 13px; }
  .sf-filters { padding: 16px 16px 0; }
  .sf-search input { height: 42px; font-size: 14px; }
  .sf-tabs { padding: 14px 16px; gap: 6px; }
  .sf-tab { padding: 8px 14px; font-size: 12.5px; }
  .sf-prod__grid { gap: 14px; padding: 0; }
  .sf-prod__body { padding: 14px; }
  .sf-prod__title { font-size: 14.5px; }
  .sf-prod__price { font-size: 18px; }
  .sf-bundlebar { padding: 12px 16px; }
  .sf-bundlebar__inner { padding: 14px 16px; gap: 12px; }
  .sf-bundlebar__title { font-size: 14px; }
  .sf-bundlebar__desc { font-size: 12px; }
  .sf-footer { padding: 40px 20px 24px; }
  .sf-footer__inner { grid-template-columns: 1fr 1fr; gap: 24px; }
  .sf-footer__copy { font-size: 12px; margin-top: 32px; padding-top: 20px; }
}

/* Tiny phone (≤ 380px) */
@media (max-width: 380px) {
  .sf-nav__logo { font-size: 16px; }
  .sf-nav__logo-svg { width: 26px !important; height: 26px !important; }
  .sf-hero__h1 { font-size: 26px; }
  .sf-h2 { font-size: 22px; }
  .sf-trustbar__inner { grid-template-columns: 1fr; }
  .sf-footer__inner { grid-template-columns: 1fr; }
}

/* Dark section mobile — giảm padding dashboard-like */
@media (max-width: 560px) {
  .sf-section--dark { padding: 44px 18px; }
  .sf-section--dark .sf-h2 { font-size: 26px; line-height: 1.2; }
}