/* ==========================================================================
   Asean Sports — Sân Pickleball chuyên nghiệp, thiết bị thể thao chính hãng
   Base styles: variables, resets, typography, layout, header, footer, buttons
   ========================================================================== */

:root {
  /* Colors */
  --color-primary: #0e8d3c;
  --color-primary-dark: #0b6e30;
  --color-primary-light: #e7f6ec;
  --color-deep: #01552d;
  --color-deep-dark: #013921;
  --color-heading: #0b1f14;
  --color-text: #5c6b63;
  --color-text-muted: #8b968f;
  --color-bg: #ffffff;
  --color-bg-light: #f4f9f7;
  --color-border: #e3ece6;
  --color-white: #ffffff;
  --color-black: #000000;
  --color-accent-yellow: #d7df23;

  /* Typography */
  --font-heading: "Montserrat", sans-serif;
  --font-body: "Inter", sans-serif;
  --font-script: "Caveat", cursive;

  /* Layout */
  --container-width: 1240px;
  --header-height: 84px;
  --radius-sm: 8px;
  --radius-md: 16px;
  --radius-lg: 24px;
  --radius-pill: 999px;

  /* Motion */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --transition-fast: 0.2s var(--ease);
  --transition-base: 0.35s var(--ease);
  --transition-slow: 0.7s var(--ease);
}

/* ---------- Reset ---------- */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.7;
  color: var(--color-text);
  background: var(--color-bg);
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

img {
  max-width: 100%;
  display: block;
}

a {
  color: inherit;
  text-decoration: none;
}

ul,
ol {
  list-style: none;
}

button {
  font: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

input,
textarea,
select {
  font: inherit;
  color: inherit;
}

svg {
  display: block;
}

/* ---------- Typography ---------- */
h1,
h2,
h3,
h4 {
  font-family: var(--font-heading);
  font-weight: 800;
  color: var(--color-heading);
  line-height: 1.25;
}

h1 {
  font-size: clamp(2rem, 4vw, 2.9rem);
  letter-spacing: -0.01em;
  text-transform: uppercase;
}

h2 {
  font-size: clamp(1.5rem, 2.4vw, 2rem);
  letter-spacing: -0.005em;
}

h3 {
  font-size: 1.05rem;
  font-weight: 700;
}

p {
  margin: 0;
}

.container {
  width: 100%;
  max-width: var(--container-width);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 84px 0;
}

.bg-light {
  background: var(--color-bg-light);
}

.bg-white {
  background: var(--color-white);
}

.bg-deep {
  background: linear-gradient(160deg, var(--color-deep-dark) 0%, var(--color-deep) 30%, var(--color-primary) 65%, var(--color-primary) calc(100% - 230px), var(--color-white) 100%);
  color: rgba(255, 255, 255, 0.85);
  position: relative;
  overflow: hidden;
}

.bg-deep h2,
.bg-deep h3 {
  color: var(--color-white);
}

.eyebrow {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-heading);
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.eyebrow::before {
  content: "";
  width: 20px;
  height: 2px;
  background: var(--color-primary);
  display: inline-block;
}

.bg-deep .eyebrow {
  color: var(--color-accent-yellow);
}

.bg-deep .eyebrow::before {
  background: var(--color-accent-yellow);
}

.section-head {
  max-width: 640px;
  margin-bottom: 44px;
}

.section-head h2 {
  margin-top: 12px;
}

.section-head-row {
  display: flex;
  align-items: flex-end;
  justify-content: space-between;
  gap: 24px;
  margin-bottom: 44px;
  flex-wrap: wrap;
}

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 28px;
  border-radius: var(--radius-pill);
  font-family: var(--font-heading);
  font-size: 0.82rem;
  font-weight: 700;
  letter-spacing: 0.03em;
  transition: transform var(--transition-fast), box-shadow var(--transition-fast), background var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
  white-space: nowrap;
}

.btn svg {
  width: 16px;
  height: 16px;
  transition: transform var(--transition-fast);
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 14px 26px -14px rgba(14, 141, 60, 0.55);
}

.btn-primary:hover svg {
  transform: translateX(3px);
}

.btn-white {
  background: var(--color-white);
  color: var(--color-primary-dark);
}

.btn-white:hover {
  background: var(--color-accent-yellow);
  color: var(--color-deep-dark);
  transform: translateY(-2px);
}

.btn-outline {
  background: transparent;
  color: var(--color-heading);
  border: 1.5px solid var(--color-border);
}

.btn-outline:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
  transform: translateY(-2px);
}

.btn-outline-white {
  background: transparent;
  color: var(--color-white);
  border: 1.5px solid rgba(255, 255, 255, 0.4);
}

.btn-outline-white:hover {
  background: var(--color-white);
  color: var(--color-deep);
  border-color: var(--color-white);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 10px 20px;
  font-size: 0.75rem;
}

.btn-block {
  width: 100%;
}

.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  font-family: var(--font-heading);
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--color-primary);
  transition: gap var(--transition-fast), color var(--transition-fast);
}

.link-arrow svg {
  width: 15px;
  height: 15px;
  transition: transform var(--transition-fast);
}

.link-arrow:hover {
  gap: 10px;
  color: var(--color-primary-dark);
}

.link-arrow:hover svg {
  transform: translateX(2px);
}

.bg-deep .link-arrow {
  color: var(--color-white);
}

.bg-deep .link-arrow:hover {
  color: var(--color-accent-yellow);
}

/* ---------- Icon circle (shared component, safe default size) ---------- */
.icon-circle {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 46px;
  height: 46px;
  min-width: 46px;
  border-radius: 50%;
  background: var(--color-primary-light);
  color: var(--color-primary);
  flex-shrink: 0;
}

.icon-circle svg {
  width: 22px;
  height: 22px;
}

/* ---------- Header ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: var(--color-white);
  border-bottom: 1px solid transparent;
  transition: box-shadow var(--transition-base), border-color var(--transition-base);
}

.site-header.is-scrolled {
  box-shadow: 0 8px 24px -18px rgba(4, 40, 20, 0.35);
  border-color: var(--color-border);
}

.site-header .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 28px;
  height: var(--header-height);
}

.brand {
  display: flex;
  align-items: center;
  gap: 10px;
  flex-shrink: 0;
}

.brand-mark {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 50px;
  height: 50px;
  flex-shrink: 0;
}

.brand-mark img {
  width: 100%;
  height: 100%;
  object-fit: contain;
}

.brand-name {
  display: block;
  font-family: var(--font-heading);
  font-weight: 800;
  font-size: 1.1rem;
  letter-spacing: 0.01em;
  color: var(--color-heading);
  line-height: 1.2;
}

.brand-tagline {
  display: block;
  font-size: 0.62rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  color: var(--color-primary);
}

.main-nav {
  display: flex;
  align-items: center;
  gap: 30px;
}

.main-nav > a,
.nav-dropdown > button {
  position: relative;
  display: flex;
  align-items: center;
  gap: 5px;
  font-family: var(--font-heading);
  font-size: 0.82rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-heading);
  padding: 10px 0;
  transition: color var(--transition-fast);
}

.main-nav > a::after {
  content: "";
  position: absolute;
  left: 0;
  bottom: 4px;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition-fast);
}

.main-nav > a:hover,
.main-nav > a.is-active {
  color: var(--color-primary);
}

.main-nav > a:hover::after,
.main-nav > a.is-active::after {
  width: 100%;
}

.nav-dropdown {
  position: relative;
}

.nav-dropdown > button svg {
  width: 13px;
  height: 13px;
  transition: transform var(--transition-fast);
}

.nav-dropdown:hover > button {
  color: var(--color-primary);
}

.nav-dropdown:hover > button svg {
  transform: rotate(180deg);
}

.dropdown-menu {
  position: absolute;
  top: 100%;
  left: -18px;
  min-width: 220px;
  background: var(--color-white);
  border-radius: var(--radius-sm);
  box-shadow: 0 22px 44px -20px rgba(4, 40, 20, 0.28);
  padding: 10px;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
}

.nav-dropdown:hover .dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.dropdown-menu a {
  display: block;
  padding: 10px 14px;
  border-radius: var(--radius-sm);
  font-size: 0.86rem;
  font-weight: 500;
  color: var(--color-text);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.dropdown-menu a:hover {
  background: var(--color-primary-light);
  color: var(--color-primary-dark);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: 8px;
}

.header-icon-btn {
  position: relative;
  width: 40px;
  height: 40px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  color: var(--color-heading);
  transition: background var(--transition-fast), color var(--transition-fast);
}

.header-icon-btn svg {
  width: 19px;
  height: 19px;
}

.header-icon-btn:hover {
  background: var(--color-primary-light);
  color: var(--color-primary);
}

.icon-badge {
  position: absolute;
  top: -1px;
  right: -1px;
  width: 17px;
  height: 17px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-white);
  font-size: 0.6rem;
  font-weight: 700;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-heading);
}

.header-search {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px 24px;
  background: var(--color-white);
  border-top: 1px solid var(--color-border);
  box-shadow: 0 24px 44px -26px rgba(4, 40, 20, 0.35);
  opacity: 0;
  visibility: hidden;
  transform: translateY(-10px);
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
  z-index: 95;
}

.header-search.is-open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.header-search input {
  width: 100%;
  max-width: 620px;
  padding: 14px 22px;
  border: 1.5px solid var(--color-border);
  border-radius: var(--radius-pill);
  font-size: 0.95rem;
  background: var(--color-bg-light);
}

.header-search input:focus {
  outline: none;
  border-color: var(--color-primary);
}

body.search-open::before {
  content: "";
  position: fixed;
  inset: var(--header-height) 0 0 0;
  background: rgba(4, 20, 12, 0.4);
  z-index: 94;
}

.nav-toggle {
  display: none;
  width: 40px;
  height: 40px;
  align-items: center;
  justify-content: center;
  color: var(--color-heading);
}

.nav-toggle svg {
  width: 22px;
  height: 22px;
}

/* ---------- Reveal animation ---------- */
[data-reveal] {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.7s var(--ease), transform 0.7s var(--ease);
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

[data-reveal-delay="0"] { transition-delay: 0s; }
[data-reveal-delay="1"] { transition-delay: 0.1s; }
[data-reveal-delay="2"] { transition-delay: 0.2s; }
[data-reveal-delay="3"] { transition-delay: 0.3s; }
[data-reveal-delay="4"] { transition-delay: 0.4s; }
[data-reveal-delay="5"] { transition-delay: 0.5s; }

/* ---------- Breadcrumb & page hero ---------- */
.breadcrumb-bar {
  background: var(--color-bg-light);
  padding: 20px 0;
}

.breadcrumb {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 8px;
  row-gap: 4px;
  font-family: var(--font-heading);
  font-size: 0.78rem;
  font-weight: 600;
  letter-spacing: 0.02em;
  text-transform: uppercase;
  color: var(--color-text-muted);
}

.breadcrumb a,
.breadcrumb > span:not([aria-current]) {
  white-space: nowrap;
}

.breadcrumb a:hover {
  color: var(--color-primary);
}

.breadcrumb span[aria-current] {
  color: var(--color-primary-dark);
}

.page-hero {
  padding: 56px 0 40px;
}

.page-hero p {
  max-width: 620px;
  margin-top: 14px;
}

/* ---------- Footer ---------- */
.site-footer {
  position: relative;
  overflow: hidden;
  background: var(--color-deep);
  color: rgba(255, 255, 255, 0.72);
}

.site-footer::before {
  content: "";
  position: absolute;
  inset: 0;
  background-image:
    radial-gradient(ellipse 900px 500px at 50% 0%, rgba(255, 255, 255, 0.08), rgba(255, 255, 255, 0) 70%),
    url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 1200 800'%3E%3Cpath d='M-100,180 C150,80 350,280 600,180 C850,80 1000,220 1300,140 L1300,230 C1000,310 850,170 600,270 C350,370 150,170 -100,270 Z' fill='%23ffffff' opacity='0.05'/%3E%3Cpath d='M-100,480 C200,560 450,380 750,480 C950,550 1100,420 1300,460 L1300,560 C1100,520 950,650 750,580 C450,480 200,660 -100,580 Z' fill='%23d7df23' opacity='0.05'/%3E%3Cpath d='M-100,620 C250,700 500,560 850,650 C1000,690 1150,640 1300,660 L1300,720 C1150,700 1000,750 850,710 C500,620 250,760 -100,680 Z' fill='%23ffffff' opacity='0.03'/%3E%3C/svg%3E");
  background-repeat: no-repeat, no-repeat;
  background-size: cover, cover;
  background-position: center, center;
  pointer-events: none;
}

.footer-cta,
.footer-main,
.footer-bottom {
  position: relative;
  z-index: 1;
}

.footer-main {
  padding: 72px 0 40px;
  position: relative;
}

.footer-main::before,
.footer-bottom::before {
  position: absolute;
  content: "";
  width: 100%;
  height: 100%;
  background-color: var(--color-black);
  opacity: 0.3;
  top: 0;
  left: 0;
  z-index: -10;
}

.footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr 1.1fr;
  gap: 40px;
}

.footer-brand .brand-name {
  color: var(--color-white);
}

.footer-desc {
  margin: 18px 0 22px;
  font-size: 0.92rem;
  max-width: 300px;
}

.footer-social {
  display: flex;
  gap: 10px;
}

.footer-social a {
  width: 38px;
  height: 38px;
  border-radius: 50%;
  border: 1px solid rgba(255, 255, 255, 0.2);
  display: flex;
  align-items: center;
  justify-content: center;
  transition: background var(--transition-fast), border-color var(--transition-fast);
}

.footer-social svg {
  width: 16px;
  height: 16px;
  color: var(--color-white);
}

.footer-social a:hover {
  background: var(--color-white);
}
.footer-social a:hover svg {
  color: var(--color-primary);
}

.footer-heading {
  font-family: var(--font-heading);
  font-size: 0.85rem;
  font-weight: 700;
  letter-spacing: 0.04em;
  text-transform: uppercase;
  color: var(--color-white);
  margin-bottom: 20px;
}

.footer-links li {
  margin-bottom: 12px;
}

.footer-links a {
  font-size: 0.92rem;
  transition: color var(--transition-fast);
}

.footer-links a:hover {
  color: var(--color-accent-yellow);
}

.footer-contact li {
  display: flex;
  align-items: flex-start;
  gap: 10px;
  margin-bottom: 14px;
  font-size: 0.9rem;
}

.footer-contact svg {
  width: 17px;
  height: 17px;
  flex-shrink: 0;
  margin-top: 2px;
  color: var(--color-accent-yellow);
}

.footer-bottom {
  font-size: 0.82rem;
}

.footer-bottom .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
  flex-wrap: wrap;
  border-top: 1px solid var(--color-border);
  padding: 22px 0;
}

.footer-tagline {
  font-family: var(--font-script);
  font-size: 1.2rem;
  color: var(--color-accent-yellow);
}

/* ---------- Back to top ---------- */
.back-to-top {
  position: fixed;
  right: 24px;
  bottom: 24px;
  width: 46px;
  height: 46px;
  border-radius: 50%;
  background: var(--color-primary);
  color: var(--color-white);
  display: flex;
  align-items: center;
  justify-content: center;
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity var(--transition-base), transform var(--transition-base), visibility var(--transition-base);
  z-index: 90;
}

.back-to-top svg {
  width: 20px;
  height: 20px;
}

.back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.back-to-top:hover {
  background: var(--color-primary-dark);
  transform: translateY(-3px);
}

/* ---------- Grid helpers ---------- */
.grid-2 {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 24px;
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}