/**
 * theme.css – Modern UI layer for Đồ Án CNTT
 * Loads AFTER main.css and BEFORE custom.css
 */

/* ═══════════════════════════════════════════════════════════
   Design tokens
═══════════════════════════════════════════════════════════ */
:root {
  --brand-primary: #4f46e5;       /* indigo-600 */
  --brand-secondary: #0ea5e9;     /* sky-500  */
  --brand-green: #22c55e;         /* green-500 */
  --heading-color: #0f172a;       /* slate-900 */
  --default-color: #334155;       /* slate-700 */
  --accent-color: #4f46e5;
  --surface-color: #ffffff;

  --header-height: 78px;

  --radius-xl: 20px;
  --radius-lg: 14px;
  --radius-md: 10px;
  --radius-pill: 999px;

  --shadow-xs: 0 2px 8px rgba(15,23,42,.06);
  --shadow-sm: 0 6px 20px rgba(15,23,42,.08);
  --shadow-md: 0 16px 40px rgba(15,23,42,.11);
  --shadow-lg: 0 28px 60px rgba(15,23,42,.14);

  --transition: .22s cubic-bezier(.4,0,.2,1);
}

/* ═══════════════════════════════════════════════════════════
   Base
═══════════════════════════════════════════════════════════ */
html {
  scroll-behavior: smooth;
  scroll-padding-top: calc(var(--header-height) + 12px);
}
::selection { background: rgba(79,70,229,.18); color: var(--heading-color); }

/* Section spacing – hero excluded (has its own padding for fixed header) */
.section:not(.hero) { padding: 90px 0; }
@media (max-width: 768px) { .section:not(.hero) { padding: 64px 0; } }

/* Hero: offset below fixed header */
.hero.section {
  padding-top: calc(var(--header-height) + 48px) !important;
  padding-bottom: 72px !important;
  min-height: auto !important;
}
@media (max-width: 991px) {
  :root { --header-height: 68px; }
  .hero.section {
    padding-top: calc(var(--header-height) + 36px) !important;
    padding-bottom: 56px !important;
  }
}
@media (max-width: 576px) {
  .hero.section {
    padding-top: calc(var(--header-height) + 28px) !important;
    padding-bottom: 48px !important;
  }
}

/* ═══════════════════════════════════════════════════════════
   Header – glass effect
═══════════════════════════════════════════════════════════ */
.header {
  background: rgba(10, 14, 36, 0.62) !important;
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
  border-bottom: 1px solid rgba(255,255,255,.08);
  transition: background var(--transition), box-shadow var(--transition);
}
.header.scrolled {
  background: rgba(10, 14, 36, 0.92) !important;
  box-shadow: 0 4px 24px rgba(0,0,0,.22);
}
.header .logo .sitename {
  font-size: 1.35rem;
  font-weight: 800;
  color: #fff;
  letter-spacing: -.02em;
}
.header .btn-getstarted {
  border-radius: var(--radius-pill) !important;
  background: var(--brand-primary) !important;
  box-shadow: 0 8px 22px rgba(79,70,229,.35);
  font-weight: 600;
  font-size: 14px;
  padding: 9px 22px !important;
  transition: transform var(--transition), box-shadow var(--transition);
}
.header .btn-getstarted:hover {
  transform: translateY(-1px);
  box-shadow: 0 14px 30px rgba(79,70,229,.42);
}

/* Trust bar inside header */
.header-trustbar {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 14px;
  border-radius: var(--radius-pill);
  background: rgba(255,255,255,.09);
  border: 1px solid rgba(255,255,255,.13);
  color: rgba(255,255,255,.88);
  font-size: 12.5px;
  margin-right: 16px;
  white-space: nowrap;
}
.header-trustbar i { font-size: 13px; color: #86efac; }
@media (max-width: 1280px) { .header-trustbar { display: none; } }

/* ═══════════════════════════════════════════════════════════
   Hero – rich gradient + chips + metric cards
═══════════════════════════════════════════════════════════ */
.hero.dark-background {
  background:
    radial-gradient(ellipse 80% 55% at 8% 30%,  rgba(79,70,229,.40) 0%, transparent 60%),
    radial-gradient(ellipse 70% 50% at 85% 15%,  rgba(14,165,233,.28) 0%, transparent 55%),
    linear-gradient(155deg, #080c1e 0%, #111c4e 55%, #0c1a3a 100%);
  min-height: calc(100vh - var(--header-height));
}

/* Badge above h1 */
.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  border-radius: var(--radius-pill);
  background: rgba(255,255,255,.10);
  border: 1px solid rgba(255,255,255,.14);
  color: rgba(255,255,255,.92);
  font-size: 13px;
  font-weight: 500;
  width: fit-content;
  margin-bottom: 14px;
}
.hero-badge .dot {
  width: 8px; height: 8px;
  border-radius: 50%;
  background: #4ade80;
  box-shadow: 0 0 0 3px rgba(74,222,128,.25);
  animation: pulse-dot 2s ease-in-out infinite;
}
@keyframes pulse-dot {
  0%,100% { box-shadow: 0 0 0 3px rgba(74,222,128,.25); }
  50%      { box-shadow: 0 0 0 6px rgba(74,222,128,.12); }
}

/* Trust chips */
.hero-chips {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin: 16px 0 22px;
}
.hero-chip {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 7px 14px;
  border-radius: var(--radius-pill);
  background: rgba(255,255,255,.09);
  border: 1px solid rgba(255,255,255,.14);
  color: rgba(255,255,255,.88);
  font-size: 13px;
}
.hero-chip i { font-size: 14px; color: #7dd3fc; }

/* Hero CTA buttons */
.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  align-items: center;
}
.hero-actions .btn-primary-hero {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 13px 28px;
  border-radius: var(--radius-pill);
  background: var(--brand-primary);
  color: #fff;
  font-weight: 700;
  font-size: 15px;
  box-shadow: 0 12px 32px rgba(79,70,229,.38);
  transition: transform var(--transition), box-shadow var(--transition);
  border: none;
  text-decoration: none;
}
.hero-actions .btn-primary-hero:hover {
  color: #fff;
  transform: translateY(-2px);
  box-shadow: 0 18px 44px rgba(79,70,229,.46);
}
.hero-actions .btn-secondary-hero {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 12px 26px;
  border-radius: var(--radius-pill);
  background: transparent;
  color: rgba(255,255,255,.88);
  font-weight: 600;
  font-size: 15px;
  border: 1.5px solid rgba(255,255,255,.32);
  transition: border-color var(--transition), background var(--transition);
  text-decoration: none;
}
.hero-actions .btn-secondary-hero:hover {
  color: #fff;
  border-color: rgba(255,255,255,.65);
  background: rgba(255,255,255,.06);
}
.hero-microcopy {
  font-size: 12.5px;
  color: rgba(255,255,255,.52);
  margin-top: 10px;
}
.hero-microcopy i { color: #4ade80; }

/* Metric cards inside hero */
.hero-metrics {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 12px;
  margin-top: 32px;
}
@media (max-width: 1200px) { .hero-metrics { grid-template-columns: repeat(2,1fr); } }
@media (max-width: 480px)  { .hero-metrics { grid-template-columns: repeat(2,1fr); } }

.metric-card {
  background: rgba(255,255,255,.08);
  border: 1px solid rgba(255,255,255,.12);
  border-radius: var(--radius-lg);
  padding: 16px 14px;
  transition: background var(--transition), transform var(--transition);
}
.metric-card:hover { background: rgba(255,255,255,.13); transform: translateY(-2px); }
.metric-icon-wrap {
  width: 36px; height: 36px;
  border-radius: 10px;
  background: rgba(255,255,255,.12);
  display: flex; align-items: center; justify-content: center;
  margin-bottom: 10px;
}
.metric-icon-wrap i { color: #93c5fd; font-size: 16px; }
.metric-value {
  color: #fff;
  font-weight: 800;
  font-size: 22px;
  line-height: 1.1;
  letter-spacing: -.03em;
}
.metric-label {
  color: rgba(255,255,255,.62);
  font-size: 12px;
  margin: 4px 0 0;
  line-height: 1.4;
}

/* ═══════════════════════════════════════════════════════════
   Section titles
═══════════════════════════════════════════════════════════ */
.section-title { text-align: center; margin-bottom: 48px; }
.section-title h2 {
  font-size: clamp(1.6rem, 3.5vw, 2.4rem);
  font-weight: 800;
  color: var(--heading-color);
  letter-spacing: -.03em;
  margin-bottom: 14px;
  position: relative;
  display: inline-block;
}
.section-title h2::after {
  content: '';
  position: absolute;
  bottom: -8px; left: 50%; transform: translateX(-50%);
  width: 48px; height: 3px;
  border-radius: 2px;
  background: linear-gradient(90deg, var(--brand-primary), var(--brand-secondary));
}
.section-title p {
  max-width: 680px;
  margin: 20px auto 0;
  color: var(--default-color);
  font-size: 1.05rem;
  line-height: 1.8;
}

/* ═══════════════════════════════════════════════════════════
   Service / Feature cards
═══════════════════════════════════════════════════════════ */
.service-item {
  border-radius: var(--radius-xl) !important;
  border: 1px solid rgba(15,23,42,.07) !important;
  box-shadow: var(--shadow-sm) !important;
  transition: transform var(--transition), box-shadow var(--transition), border-color var(--transition) !important;
  background: #fff;
  padding: 15px;
}
.service-item:hover {
  transform: translateY(-4px) !important;
  box-shadow: var(--shadow-md) !important;
  border-color: rgba(79,70,229,.18) !important;
}
.service-item .icon i {
  background: linear-gradient(135deg, var(--brand-primary), var(--brand-secondary));
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.service-item h4 { font-size: 1rem; font-weight: 700; margin-top: 4px; }
.service-item p  { font-size: .93rem; line-height: 1.65; }

/* ═══════════════════════════════════════════════════════════
   Pricing cards
═══════════════════════════════════════════════════════════ */
.pricing-item {
  border-radius: var(--radius-xl) !important;
  border: 1.5px solid rgba(15,23,42,.08) !important;
  box-shadow: var(--shadow-sm) !important;
  position: relative;
  overflow: visible;
  transition: transform var(--transition), box-shadow var(--transition) !important;
}
.pricing-item:hover {
  transform: translateY(-4px) !important;
  box-shadow: var(--shadow-md) !important;
}
.pricing-item.featured {
  border-color: color-mix(in srgb, var(--brand-primary) 40%, transparent) !important;
  box-shadow: var(--shadow-md), 0 0 0 4px rgba(79,70,229,.08) !important;
}
.pricing-badge {
  position: absolute;
  top: -14px; left: 50%; transform: translateX(-50%);
  background: linear-gradient(90deg, var(--brand-primary), #7c3aed);
  color: #fff;
  font-size: 11.5px;
  font-weight: 700;
  padding: 6px 18px;
  border-radius: var(--radius-pill);
  white-space: nowrap;
  box-shadow: 0 8px 22px rgba(79,70,229,.35);
  letter-spacing: .04em;
  text-transform: uppercase;
}
.pricing-item h3 { font-size: 1.15rem; font-weight: 800; }
.pricing-item ul li { font-size: .93rem; line-height: 1.6; }

/* Pricing – description */
.pricing-desc {
  color: #64748b;
  font-size: .875rem;
  margin: -4px 0 0;
  line-height: 1.5;
}

/* Pricing – price block (replaces crude $ emoji) */
.pricing-price {
  margin: 20px 0 8px;
  padding: 20px 16px;
  border-radius: var(--radius-lg);
  background: linear-gradient(135deg, #f8f9ff 0%, #f1f5f9 100%);
  border: 1px solid rgba(79, 70, 229, 0.10);
  text-align: center;
}
.pricing-item.featured .pricing-price {
  background: linear-gradient(135deg, rgba(79,70,229,.06) 0%, rgba(124,58,237,.04) 100%);
  border-color: rgba(79, 70, 229, 0.18);
}

/* Tier indicator bars */
.pricing-tier {
  display: flex;
  justify-content: center;
  gap: 6px;
  margin-bottom: 14px;
}
.tier-bar {
  display: block;
  width: 28px;
  height: 4px;
  border-radius: 99px;
  background: rgba(15, 23, 42, 0.10);
  transition: background var(--transition), transform var(--transition);
}
.tier-bar.active {
  background: linear-gradient(90deg, var(--brand-primary), #7c3aed);
  box-shadow: 0 2px 8px rgba(79, 70, 229, 0.35);
}

.pricing-amount {
  margin: 0;
  font-family: var(--heading-font);
  font-size: 2rem;
  font-weight: 800;
  letter-spacing: -0.03em;
  line-height: 1.1;
  background: linear-gradient(135deg, var(--brand-primary) 0%, #7c3aed 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.pricing-unit {
  margin: 6px 0 0;
  font-size: .8rem;
  font-weight: 500;
  color: #94a3b8;
  letter-spacing: 0.02em;
  text-transform: none;
}

/* Override legacy h4 pricing styles */
.pricing .pricing-item h4 { display: none; }

/* Buy button – modern pill */
.pricing .buy-btn {
  display: block;
  width: 100%;
  text-align: center;
  margin-top: 8px;
  padding: 12px 24px !important;
  border-radius: var(--radius-pill) !important;
  font-weight: 700 !important;
  font-size: .9rem !important;
  border: 1.5px solid var(--brand-primary) !important;
  color: var(--brand-primary) !important;
  background: transparent !important;
  transition: all var(--transition) !important;
}
.pricing .buy-btn:hover {
  background: var(--brand-primary) !important;
  color: #fff !important;
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(79, 70, 229, 0.28);
}
.pricing .pricing-item.featured .buy-btn {
  background: linear-gradient(90deg, var(--brand-primary), #7c3aed) !important;
  color: #fff !important;
  border-color: transparent !important;
  box-shadow: 0 10px 26px rgba(79, 70, 229, 0.32);
}
.pricing .pricing-item.featured .buy-btn:hover {
  box-shadow: 0 14px 34px rgba(79, 70, 229, 0.42);
  transform: translateY(-2px);
}

/* Card inner padding refinement */
.pricing .pricing-item {
  padding: 36px 28px 32px !important;
  text-align: center;
}
.pricing .pricing-item ul {
  text-align: left;
  margin-top: 4px;
  padding-top: 16px;
  border-top: 1px solid rgba(15, 23, 42, 0.06);
}
.pricing .pricing-item ul i {
  font-size: 1rem !important;
  color: var(--brand-green) !important;
  margin-right: 8px;
  flex-shrink: 0;
}

/* ═══════════════════════════════════════════════════════════
   Testimonials
═══════════════════════════════════════════════════════════ */
.testimonial-item {
  border-radius: var(--radius-xl) !important;
  border: 1px solid rgba(15,23,42,.07) !important;
  box-shadow: var(--shadow-sm) !important;
  transition: transform var(--transition), box-shadow var(--transition) !important;
}
.testimonial-item:hover {
  transform: translateY(-3px) !important;
  box-shadow: var(--shadow-md) !important;
}

/* ═══════════════════════════════════════════════════════════
   FAQ
═══════════════════════════════════════════════════════════ */
.faq-container { border-radius: var(--radius-xl); overflow: hidden; }
.faq-item { border-radius: var(--radius-lg) !important; margin-bottom: 10px; }

/* ═══════════════════════════════════════════════════════════
   Contact – quick actions + form
═══════════════════════════════════════════════════════════ */
.contact-quick-actions {
  display: flex;
  gap: 10px;
  flex-wrap: wrap;
  margin-bottom: 20px;
}
.contact-quick-btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  border-radius: var(--radius-pill);
  background: #fff;
  border: 1.5px solid rgba(15,23,42,.10);
  box-shadow: var(--shadow-xs);
  font-weight: 600;
  font-size: 14px;
  color: var(--heading-color);
  text-decoration: none;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}
.contact-quick-btn:hover {
  border-color: rgba(79,70,229,.30);
  box-shadow: var(--shadow-sm);
  transform: translateY(-1px);
  color: var(--brand-primary);
}
.contact-quick-btn.btn-zalo { border-color: rgba(0,104,255,.25); }
.contact-quick-btn.btn-zalo i { color: #0068ff; }
.contact-quick-btn.btn-phone i { color: #22c55e; }
.contact-quick-btn.btn-email i { color: #f59e0b; }

.info-wrap {
  border-radius: var(--radius-xl);
  border: 1.5px solid rgba(15,23,42,.07);
  box-shadow: var(--shadow-sm);
  background: #fff;
}
.php-email-form .form-control {
  border-radius: var(--radius-md);
  border: 1.5px solid rgba(15,23,42,.12);
  transition: border-color var(--transition), box-shadow var(--transition);
}
.php-email-form .form-control:focus {
  border-color: rgba(79,70,229,.50);
  box-shadow: 0 0 0 3px rgba(79,70,229,.10);
  outline: none;
}
.php-email-form button[type="submit"] {
  border-radius: var(--radius-pill) !important;
  background: linear-gradient(90deg, var(--brand-primary), #7c3aed) !important;
  border: none !important;
  padding: 13px 36px !important;
  font-weight: 700 !important;
  font-size: 15px !important;
  box-shadow: 0 10px 26px rgba(79,70,229,.32) !important;
  transition: transform var(--transition), box-shadow var(--transition) !important;
}
.php-email-form button[type="submit"]:hover {
  transform: translateY(-2px) !important;
  box-shadow: 0 16px 38px rgba(79,70,229,.42) !important;
}

/* ═══════════════════════════════════════════════════════════
   CTA section
═══════════════════════════════════════════════════════════ */
.call-to-action .cta-btn {
  border-radius: var(--radius-pill) !important;
  box-shadow: 0 12px 30px rgba(79,70,229,.32);
  font-weight: 700 !important;
}

/* ═══════════════════════════════════════════════════════════
   Floating Zalo button
═══════════════════════════════════════════════════════════ */
.zalo-float {
  position: fixed;
  bottom: 84px; right: 22px;
  z-index: 9990;
  width: 52px; height: 52px;
  border-radius: 50%;
  background: #0068ff;
  display: flex; align-items: center; justify-content: center;
  box-shadow: 0 8px 24px rgba(0,104,255,.40);
  transition: transform var(--transition), box-shadow var(--transition);
  animation: float-in .4s ease both;
}
.zalo-float:hover {
  transform: translateY(-3px) scale(1.05);
  box-shadow: 0 14px 34px rgba(0,104,255,.50);
}
@keyframes float-in {
  from { opacity: 0; transform: scale(.6); }
  to   { opacity: 1; transform: scale(1); }
}
.zalo-float svg text { font-size: 13px; font-weight: 800; fill: #fff; }

/* ═══════════════════════════════════════════════════════════
   Footer
═══════════════════════════════════════════════════════════ */
.footer { background: #0a0e24; color: #fff; }
.footer .sitename { font-size: 1.2rem; font-weight: 800; color: #fff; }
.footer h4 { font-size: .95rem; font-weight: 700; color: #fff; }
.footer p,
.footer .footer-contact p,
.footer .copyright p,
.footer .credits { color: #fff; }
.footer p strong { color: #fff; }
.footer .footer-links ul a { color: rgba(255, 255, 255, 0.85); }
.footer .footer-links ul a:hover { color: #fff; }
.footer .footer-about a { color: #fff; }
.footer .social-links a {
  color: #fff;
  border-color: rgba(255, 255, 255, 0.4);
}
.footer .social-links a:hover {
  color: #fff;
  border-color: #fff;
}
.footer .copyright { border-top-color: rgba(255, 255, 255, 0.15); }
.footer-newsletter { background: linear-gradient(135deg, #111c4e, #1e1456); }
.footer-newsletter h4,
.footer-newsletter p { color: #fff; }

/* ═══════════════════════════════════════════════════════════
   Light-background sections: subtle off-white
═══════════════════════════════════════════════════════════ */
.light-background { background: #f8f9ff !important; }

/* ═══════════════════════════════════════════════════════════
   Scroll-top button
═══════════════════════════════════════════════════════════ */
.scroll-top { border-radius: var(--radius-pill) !important; }

/* ═══════════════════════════════════════════════════════════
   Header scroll JS class
═══════════════════════════════════════════════════════════ */