/* ============================================================
   PAINTZONE — Premium Painting Service
   Orange × Purple, Premium Professional
   ============================================================ */

:root {
  --orange-50:  #FFF4ED;
  --orange-100: #FFE3D0;
  --orange-300: #FFB37A;
  --orange-500: #F26B1F;
  --orange-600: #E0541A;
  --orange-700: #B53D0F;

  --purple-50:  #F4EEFA;
  --purple-100: #E2D2F0;
  --purple-300: #B894D9;
  --purple-500: #6B2D8C;
  --purple-600: #501F6B;
  --purple-700: #391550;

  --ink-900: #1A1320;
  --ink-700: #3C2F45;
  --ink-500: #6B5E73;
  --ink-300: #B8AEC0;
  --ink-100: #EDE7F0;
  --paper:   #FFFCFA;
  --paper-2: #F8F2EE;

  --shadow-sm: 0 2px 8px rgba(57, 21, 80, 0.08);
  --shadow-md: 0 8px 24px rgba(57, 21, 80, 0.12);
  --shadow-lg: 0 20px 60px rgba(57, 21, 80, 0.18);

  --radius-sm: 10px;
  --radius-md: 18px;
  --radius-lg: 28px;

  --gradient-brand: linear-gradient(135deg, #F26B1F 0%, #6B2D8C 100%);
  --gradient-warm: linear-gradient(135deg, #FFB37A 0%, #B894D9 100%);
  --gradient-deep: linear-gradient(135deg, #B53D0F 0%, #391550 100%);

  --container: 1240px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
  margin: 0;
  font-family: "Prompt", "Sarabun", -apple-system, BlinkMacSystemFont, sans-serif;
  font-weight: 400;
  color: var(--ink-900);
  background: var(--paper);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

h1, h2, h3, h4 {
  font-family: "Prompt", sans-serif;
  color: var(--ink-900);
  line-height: 1.25;
  margin: 0 0 .6em;
  font-weight: 600;
  letter-spacing: -0.01em;
}
h1 { font-size: clamp(2rem, 4.4vw, 3.4rem); font-weight: 700; }
h2 { font-size: clamp(1.6rem, 3vw, 2.4rem); }
h3 { font-size: clamp(1.2rem, 2vw, 1.5rem); }
h4 { font-size: 1.1rem; }

p { margin: 0 0 1em; color: var(--ink-700); }

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

/* ---------- TOP BAR ---------- */
.topbar {
  background: var(--gradient-deep);
  color: #fff;
  font-size: .88rem;
  padding: 8px 0;
}
.topbar .container { display: flex; justify-content: space-between; gap: 16px; flex-wrap: wrap; }
.topbar a { color: var(--orange-100); }
.topbar a:hover { color: #fff; }

/* ---------- NAV ---------- */
.nav {
  position: sticky; top: 0; z-index: 50;
  background: rgba(255, 252, 250, 0.92);
  backdrop-filter: saturate(180%) blur(14px);
  -webkit-backdrop-filter: saturate(180%) blur(14px);
  border-bottom: 1px solid rgba(107, 45, 140, 0.08);
}
.nav-inner {
  display: flex; align-items: center; justify-content: space-between;
  padding: 16px 24px;
  max-width: var(--container);
  margin: 0 auto;
}
.logo {
  display: flex; align-items: center; gap: 12px;
  font-weight: 700; font-size: 1.2rem; color: var(--ink-900);
}
.logo-mark {
  width: 42px; height: 42px; border-radius: 12px;
  background: var(--gradient-brand);
  display: grid; place-items: center;
  color: #fff; font-weight: 800;
  box-shadow: var(--shadow-sm);
}
.logo-mark span { font-size: 1.1rem; letter-spacing: -.02em; }
.logo small { display: block; font-weight: 400; font-size: .72rem; color: var(--ink-500); margin-top: 2px; }

.nav-links { display: flex; gap: 8px; align-items: center; }
.nav-links a {
  padding: 8px 14px; border-radius: 999px;
  font-size: .95rem; color: var(--ink-700); font-weight: 500;
  transition: all .2s;
}
.nav-links a:hover, .nav-links a.active {
  background: var(--purple-50); color: var(--purple-700);
}
.nav-cta {
  background: var(--gradient-brand); color: #fff !important;
  padding: 10px 18px !important; font-weight: 600 !important;
}

.nav-toggle { display: none; background: none; border: 0; width: 40px; height: 40px; cursor: pointer; }
.nav-toggle span { display: block; width: 22px; height: 2px; background: var(--ink-900); margin: 5px auto; }

@media (max-width: 880px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: absolute; top: 100%; left: 0; right: 0;
    flex-direction: column; align-items: stretch; gap: 0;
    background: #fff; padding: 12px; border-top: 1px solid var(--ink-100);
    display: none;
  }
  .nav-links.open { display: flex; }
  .nav-links a { padding: 12px 16px; }
}

/* ---------- HERO ---------- */
.hero {
  position: relative; overflow: hidden;
  padding: 80px 0 100px;
  background:
    radial-gradient(900px 600px at 110% -10%, rgba(242, 107, 31, 0.18), transparent 60%),
    radial-gradient(700px 500px at -10% 110%, rgba(107, 45, 140, 0.20), transparent 60%),
    var(--paper);
}
.hero-grid {
  display: grid; grid-template-columns: 1.1fr 1fr; gap: 56px; align-items: center;
}
.hero .eyebrow {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 8px 16px; border-radius: 999px;
  background: var(--orange-50); color: var(--orange-700);
  font-weight: 600; font-size: .88rem; margin-bottom: 22px;
  border: 1px solid var(--orange-100);
}
.hero h1 .brand-grad {
  background: var(--gradient-brand);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.hero p.lead { font-size: 1.15rem; color: var(--ink-700); max-width: 560px; margin: 18px 0 32px; }

.cta-row { display: flex; gap: 14px; flex-wrap: wrap; }
.btn {
  display: inline-flex; align-items: center; gap: 10px;
  padding: 16px 28px; border-radius: 999px;
  font-weight: 600; font-size: 1rem;
  border: 0; cursor: pointer;
  transition: transform .15s ease, box-shadow .2s;
  font-family: inherit;
}
.btn:hover { transform: translateY(-2px); }
.btn-primary { background: var(--gradient-brand); color: #fff; box-shadow: var(--shadow-md); }
.btn-line { background: #06C755; color: #fff; box-shadow: 0 8px 24px rgba(6, 199, 85, .25); }
.btn-ghost { background: #fff; color: var(--purple-700); border: 1.5px solid var(--purple-100); }

.hero-stats {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
  margin-top: 40px; padding-top: 28px; border-top: 1px solid var(--ink-100);
}
.hero-stats .stat strong {
  display: block; font-size: 1.8rem; color: var(--purple-700); font-weight: 700;
}
.hero-stats .stat span { color: var(--ink-500); font-size: .9rem; }

.hero-visual {
  position: relative; aspect-ratio: 4/5; border-radius: var(--radius-lg);
  overflow: hidden; box-shadow: var(--shadow-lg);
  background: var(--gradient-warm);
}
.hero-visual img { width: 100%; height: 100%; object-fit: cover; }
.hero-visual::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 55%, rgba(57, 21, 80, .55) 100%);
}
.hero-badge {
  position: absolute; bottom: 24px; left: 24px; right: 24px;
  background: rgba(255, 252, 250, 0.95); backdrop-filter: blur(10px);
  border-radius: 16px; padding: 18px 22px;
  display: flex; gap: 16px; align-items: center;
  box-shadow: var(--shadow-md);
}
.hero-badge .icon {
  width: 48px; height: 48px; border-radius: 12px;
  background: var(--gradient-brand); display: grid; place-items: center;
  color: #fff; font-size: 1.3rem; font-weight: 800;
}
.hero-badge strong { display: block; font-size: 1rem; color: var(--ink-900); }
.hero-badge span { color: var(--ink-500); font-size: .85rem; }

@media (max-width: 880px) {
  .hero { padding: 56px 0 70px; }
  .hero-grid { grid-template-columns: 1fr; gap: 32px; }
  .hero-stats { grid-template-columns: repeat(3, 1fr); gap: 12px; }
  .hero-stats .stat strong { font-size: 1.3rem; }
}

/* ---------- SECTIONS ---------- */
section { padding: 90px 0; }
.section-head { text-align: center; max-width: 760px; margin: 0 auto 56px; }
.section-head .eyebrow {
  display: inline-block; padding: 6px 14px; border-radius: 999px;
  background: var(--purple-50); color: var(--purple-700);
  font-weight: 600; font-size: .82rem; margin-bottom: 14px;
  letter-spacing: .04em; text-transform: uppercase;
}
.section-head p { color: var(--ink-500); font-size: 1.05rem; }

/* ---------- SERVICE CARDS ---------- */
.services-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 28px;
}
.service-card {
  background: #fff; border-radius: var(--radius-md);
  overflow: hidden; box-shadow: var(--shadow-sm);
  border: 1px solid rgba(107, 45, 140, .06);
  transition: transform .2s, box-shadow .2s;
}
.service-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-md); }
.service-card .img-wrap { aspect-ratio: 1/1; overflow: hidden; background: var(--paper-2); }
.service-card .img-wrap img { width: 100%; height: 100%; object-fit: cover; transition: transform .4s; }
.service-card:hover .img-wrap img { transform: scale(1.06); }
.service-card .body { padding: 24px; }
.service-card h3 { color: var(--purple-700); margin-bottom: 8px; }
.service-card p { font-size: .95rem; margin: 0; color: var(--ink-500); }
.service-card .tag {
  display: inline-block; padding: 4px 10px; border-radius: 999px;
  background: var(--orange-50); color: var(--orange-700);
  font-size: .76rem; font-weight: 600; margin-bottom: 10px;
}

@media (max-width: 880px) {
  .services-grid { grid-template-columns: repeat(2, 1fr); gap: 16px; }
  .service-card .body { padding: 16px; }
}
@media (max-width: 520px) {
  .services-grid { grid-template-columns: 1fr; }
}

/* ---------- PROCESS STEPS ---------- */
.process {
  background: linear-gradient(180deg, var(--paper-2) 0%, var(--paper) 100%);
}
.steps {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 20px;
  counter-reset: step;
}
.step {
  background: #fff; padding: 28px 22px;
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  position: relative;
}
.step::before {
  counter-increment: step;
  content: counter(step, decimal-leading-zero);
  display: block;
  font-size: 2.2rem; font-weight: 800;
  background: var(--gradient-brand);
  -webkit-background-clip: text; background-clip: text; color: transparent;
  margin-bottom: 12px;
  line-height: 1;
}
.step h4 { color: var(--purple-700); font-size: 1.05rem; margin-bottom: 6px; }
.step p { font-size: .9rem; color: var(--ink-500); margin: 0; }

@media (max-width: 880px) {
  .steps { grid-template-columns: repeat(2, 1fr); }
}

/* ---------- SPLIT (PROMOTE / TECHNIQUE) ---------- */
.split {
  display: grid; grid-template-columns: 1fr 1fr; gap: 60px; align-items: center;
}
.split.reverse { direction: rtl; }
.split.reverse > * { direction: ltr; }
.split-img {
  aspect-ratio: 4/3; border-radius: var(--radius-lg);
  overflow: hidden; box-shadow: var(--shadow-lg);
  position: relative;
}
.split-img img { width: 100%; height: 100%; object-fit: cover; }
.split h2 { margin-bottom: 18px; }
.split ul { padding: 0; list-style: none; margin: 22px 0; }
.split ul li {
  padding: 12px 0 12px 36px; position: relative;
  border-bottom: 1px dashed var(--ink-100);
  color: var(--ink-700);
}
.split ul li::before {
  content: "✓"; position: absolute; left: 0; top: 12px;
  width: 24px; height: 24px; border-radius: 50%;
  background: var(--gradient-brand); color: #fff;
  display: grid; place-items: center; font-size: .8rem; font-weight: 700;
}
.split.promo {
  background: linear-gradient(135deg, var(--purple-700) 0%, var(--orange-700) 100%);
  color: #fff; padding: 60px; border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
}
.split.promo h2, .split.promo p, .split.promo li { color: #fff; }
.split.promo li { border-bottom-color: rgba(255,255,255,.15); }
.split.promo li::before { background: #fff; color: var(--purple-700); }

@media (max-width: 880px) {
  .split { grid-template-columns: 1fr; gap: 32px; }
  .split.promo { padding: 32px; }
}

/* ---------- GALLERY GRID ---------- */
.gallery-grid {
  display: grid; grid-template-columns: repeat(5, 1fr); gap: 12px;
}
.gallery-grid a {
  aspect-ratio: 1/1; overflow: hidden; border-radius: 12px;
  display: block; background: var(--paper-2);
  position: relative;
}
.gallery-grid img {
  width: 100%; height: 100%; object-fit: cover;
  transition: transform .4s;
}
.gallery-grid a:hover img { transform: scale(1.07); }
.gallery-grid a::after {
  content: ""; position: absolute; inset: 0;
  background: linear-gradient(180deg, transparent 70%, rgba(57, 21, 80, .35) 100%);
  opacity: 0; transition: opacity .2s;
}
.gallery-grid a:hover::after { opacity: 1; }

@media (max-width: 880px) { .gallery-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 520px) { .gallery-grid { grid-template-columns: repeat(2, 1fr); } }

/* ---------- CALCULATOR ---------- */
.calculator {
  background: linear-gradient(135deg, #fff 0%, var(--purple-50) 100%);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-md);
  border: 1px solid var(--purple-100);
}
.calc-grid {
  display: grid; grid-template-columns: 1.3fr 1fr; gap: 40px; align-items: start;
}
.field { margin-bottom: 18px; }
.field label {
  display: block; font-weight: 600; color: var(--ink-900);
  margin-bottom: 8px; font-size: .95rem;
}
.field input, .field select, .field textarea {
  width: 100%; padding: 14px 16px;
  border: 1.5px solid var(--ink-100); border-radius: 12px;
  font: inherit; background: #fff; color: var(--ink-900);
  transition: border .15s, box-shadow .15s;
}
.field input:focus, .field select:focus, .field textarea:focus {
  outline: 0; border-color: var(--purple-500);
  box-shadow: 0 0 0 4px rgba(107, 45, 140, .1);
}
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }

.calc-result {
  background: var(--gradient-deep); color: #fff;
  border-radius: var(--radius-md); padding: 32px;
  position: sticky; top: 100px;
}
.calc-result .price {
  font-size: 2.6rem; font-weight: 800; margin: 12px 0;
  background: linear-gradient(135deg, #FFB37A, #fff);
  -webkit-background-clip: text; background-clip: text; color: transparent;
}
.calc-result small { color: var(--orange-100); }
.calc-result hr { border: 0; border-top: 1px solid rgba(255,255,255,.15); margin: 20px 0; }

@media (max-width: 880px) {
  .calculator { padding: 24px; }
  .calc-grid { grid-template-columns: 1fr; gap: 24px; }
  .calc-result { position: relative; top: 0; }
}

/* ---------- REVIEWS ---------- */
.reviews-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 22px;
}
.review {
  background: #fff; border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  border: 1px solid rgba(107, 45, 140, .06);
  overflow: hidden;
  display: flex; flex-direction: column;
}
.review-avatar {
  width: 100%; aspect-ratio: 1/1;
  overflow: hidden;
  background: var(--gradient-warm);
}
.review-avatar img { width: 100%; height: 100%; object-fit: cover; display: block; }
.review-head { display: flex; flex-direction: column; gap: 2px; padding: 18px 22px 6px; }
.review-name { font-weight: 600; color: var(--ink-900); }
.review-meta { font-size: .82rem; color: var(--ink-500); }
.review-stars { color: var(--orange-500); margin: 0 22px 10px; font-size: .9rem; }
.review > p { font-size: .92rem; color: var(--ink-700); margin: 0; padding: 0 22px 22px; }

@media (max-width: 1080px) { .reviews-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .reviews-grid { grid-template-columns: 1fr; } }

/* ---------- ARTICLES PREVIEW ---------- */
.articles-grid {
  display: grid; grid-template-columns: repeat(3, 1fr); gap: 24px;
}
.article-card {
  background: #fff; border-radius: var(--radius-md);
  overflow: hidden; box-shadow: var(--shadow-sm);
  border: 1px solid rgba(107, 45, 140, .06);
  transition: transform .2s;
}
.article-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); }
.article-card .img-wrap { aspect-ratio: 16/10; overflow: hidden; }
.article-card .img-wrap img { width: 100%; height: 100%; object-fit: cover; }
.article-card .body { padding: 22px; }
.article-card .body .cat {
  display: inline-block; padding: 4px 10px; border-radius: 999px;
  background: var(--purple-50); color: var(--purple-700);
  font-size: .76rem; font-weight: 600; margin-bottom: 8px;
}
.article-card h3 { font-size: 1.1rem; margin-bottom: 8px; }
.article-card p { font-size: .9rem; color: var(--ink-500); margin: 0; }

@media (max-width: 880px) { .articles-grid { grid-template-columns: 1fr; } }

/* ---------- FAQ ---------- */
.faq { max-width: 880px; margin: 0 auto; }
.faq details {
  background: #fff; border-radius: 14px;
  margin-bottom: 12px;
  border: 1px solid var(--ink-100);
  overflow: hidden;
  transition: box-shadow .2s;
}
.faq details[open] { box-shadow: var(--shadow-sm); border-color: var(--purple-100); }
.faq summary {
  padding: 20px 24px; cursor: pointer;
  font-weight: 600; color: var(--ink-900);
  list-style: none; display: flex; justify-content: space-between; align-items: center;
  gap: 16px;
}
.faq summary::-webkit-details-marker { display: none; }
.faq summary::after {
  content: "+"; font-size: 1.4rem; color: var(--orange-500);
  width: 30px; height: 30px; border-radius: 50%;
  background: var(--orange-50); display: grid; place-items: center;
  transition: transform .2s;
  flex-shrink: 0;
}
.faq details[open] summary::after { content: "−"; transform: rotate(180deg); }
.faq .answer { padding: 0 24px 20px; color: var(--ink-700); }

/* ---------- PROVINCES ---------- */
.provinces-grid {
  display: grid; grid-template-columns: repeat(4, 1fr); gap: 8px;
}
.provinces-grid a {
  padding: 10px 14px; border-radius: 10px;
  background: #fff; border: 1px solid var(--ink-100);
  font-size: .9rem; color: var(--ink-700);
  transition: all .15s;
  display: flex; justify-content: space-between; align-items: center;
}
.provinces-grid a:hover {
  background: var(--purple-50); color: var(--purple-700);
  border-color: var(--purple-100);
}
.provinces-grid a::after {
  content: "→"; opacity: 0; transition: opacity .15s; color: var(--orange-500);
}
.provinces-grid a:hover::after { opacity: 1; }

@media (max-width: 880px) { .provinces-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px) { .provinces-grid { grid-template-columns: 1fr; } }

/* ---------- KNOWLEDGE LIST ---------- */
.knowledge-grid {
  display: grid; grid-template-columns: repeat(2, 1fr); gap: 18px;
}
.knowledge-item {
  background: #fff; padding: 22px 24px;
  border-radius: var(--radius-md);
  border-left: 4px solid var(--orange-500);
  box-shadow: var(--shadow-sm);
}
.knowledge-item h4 { color: var(--purple-700); margin-bottom: 6px; }
.knowledge-item p { font-size: .92rem; color: var(--ink-700); margin: 0; }

@media (max-width: 880px) { .knowledge-grid { grid-template-columns: 1fr; } }

/* ---------- FLOATING CONTACT ---------- */
.float-actions {
  position: fixed; bottom: 24px; right: 24px;
  display: flex; flex-direction: column; gap: 12px;
  z-index: 60;
}
.float-actions a {
  width: 58px; height: 58px; border-radius: 50%;
  display: grid; place-items: center;
  color: #fff; font-size: 1.4rem;
  box-shadow: var(--shadow-md);
  transition: transform .15s;
}
.float-actions a:hover { transform: scale(1.08); }
.float-call { background: var(--gradient-brand); }
.float-line { background: #06C755; }

/* ---------- FOOTER ---------- */
footer {
  background: var(--ink-900); color: var(--ink-300);
  padding: 70px 0 30px; margin-top: 60px;
}
footer h4 { color: #fff; margin-bottom: 18px; font-size: 1rem; }
.footer-grid {
  display: grid; grid-template-columns: 1.4fr 1fr 1fr 1fr; gap: 40px;
  margin-bottom: 48px;
}
footer a { color: var(--ink-300); display: block; padding: 4px 0; font-size: .92rem; }
footer a:hover { color: var(--orange-300); }
footer .copyright {
  border-top: 1px solid rgba(255,255,255,.08);
  padding-top: 24px; text-align: center; font-size: .85rem;
  color: var(--ink-500);
}

@media (max-width: 880px) {
  .footer-grid { grid-template-columns: 1fr 1fr; }
}

/* ---------- ARTICLE PAGE ---------- */
.article-hero {
  padding: 80px 0 40px;
  background: linear-gradient(135deg, var(--purple-50) 0%, var(--orange-50) 100%);
}
.article-content {
  max-width: 800px; margin: 0 auto; padding: 60px 24px;
}
.article-content img { border-radius: var(--radius-md); margin: 24px 0; }
.article-content p { font-size: 1.05rem; line-height: 1.85; }
.article-content h2 { margin-top: 40px; color: var(--purple-700); }
.article-content h3 { margin-top: 28px; color: var(--orange-700); }
.article-content ul li { margin-bottom: 8px; }

/* ---------- UTILITIES ---------- */
.text-center { text-align: center; }
.mb-0 { margin-bottom: 0 !important; }
.mt-4 { margin-top: 32px; }
.muted { color: var(--ink-500); }

/* Scroll reveal */
.reveal { opacity: 0; transform: translateY(20px); transition: opacity .6s ease, transform .6s ease; }
.reveal.in { opacity: 1; transform: translateY(0); }