/* ============================================================
   style.css — บริษัท เทคมีทูยัวฮาร์ท จำกัด
   Mobile-First | CSS Flexbox & Grid | Vanilla (ไม่มี framework)
   ============================================================ */

/* ---------- 1) ตัวแปรสี & ค่าพื้นฐาน (CSS Variables) ---------- */
:root {
  --color-primary: #0d7377;      /* เขียวเทียลเข้ม — สีหลักของแบรนด์ */
  --color-primary-dark: #095255; /* เทียลเข้มพิเศษ สำหรับ hover */
  --color-secondary: #14a09a;    /* เทียลสว่าง — สีรอง */
  --color-accent: #ff6b6b;       /* ส้มคอรัล — แทน "หัวใจ" สีปุ่ม/เน้น */
  --color-accent-dark: #e85555;  /* คอรัลเข้ม สำหรับ hover */
  --color-bg: #fffaf5;           /* ครีมอุ่น — พื้นหลังหลัก */
  --color-surface: #ffffff;      /* พื้นการ์ด */
  --color-text: #243133;         /* ตัวอักษรหลัก */
  --color-muted: #6b7a7c;        /* ตัวอักษรรอง */
  --color-border: #e6e1da;       /* เส้นขอบ */
  --color-gold: #f4a261;         /* ดาวรีวิว/ไฮไลต์ */

  --radius: 14px;
  --radius-sm: 8px;
  --shadow: 0 6px 24px rgba(13, 115, 119, 0.10);
  --shadow-lg: 0 14px 40px rgba(13, 115, 119, 0.18);
  --container: 1180px;
  --transition: 0.25s ease;

  --font: "Prompt", "Sarabun", "Segoe UI", system-ui, -apple-system, sans-serif;
}

/* ---------- 2) Reset & พื้นฐาน ---------- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html { scroll-behavior: smooth; }

body {
  font-family: var(--font);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

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

/* ---------- 3) Layout helper ---------- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 18px;
}

section { padding: 56px 0; }

.section-head { text-align: center; max-width: 720px; margin: 0 auto 36px; }
.section-head .eyebrow {
  display: inline-block;
  color: var(--color-accent);
  font-weight: 600;
  letter-spacing: 1px;
  font-size: 0.85rem;
  text-transform: uppercase;
  margin-bottom: 8px;
}
.section-head h2 {
  font-size: clamp(1.5rem, 4vw, 2.2rem);
  color: var(--color-primary-dark);
  margin-bottom: 10px;
  font-weight: 700;
}
.section-head p { color: var(--color-muted); }

/* ---------- 4) ปุ่ม (Buttons) ---------- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 26px;
  border: none;
  border-radius: 50px;
  font-family: var(--font);
  font-weight: 600;
  font-size: 1rem;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
}
.btn-primary { background: var(--color-accent); color: #fff; }
.btn-primary:hover { background: var(--color-accent-dark); transform: translateY(-2px); box-shadow: var(--shadow-lg); }
.btn-outline { background: transparent; color: var(--color-primary); border: 2px solid var(--color-primary); }
.btn-outline:hover { background: var(--color-primary); color: #fff; }
.btn-ghost { background: rgba(255,255,255,0.15); color: #fff; border: 2px solid rgba(255,255,255,0.5); }
.btn-ghost:hover { background: #fff; color: var(--color-primary); }
.btn-block { width: 100%; }

/* ---------- 5) Header & Navbar ---------- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: rgba(255,255,255,0.96);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}
.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 70px;
}
.brand { display: flex; align-items: center; gap: 10px; }
.brand .logo {
  width: 42px; height: 42px; border-radius: 12px;
  background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
  color: #fff; font-weight: 800; font-size: 1.2rem;
  display: grid; place-items: center;
  position: relative;
}
.brand .logo::after { content: "♥"; color: var(--color-accent); position: absolute; bottom: 2px; right: 4px; font-size: 0.7rem; }
.brand-text strong { display: block; color: var(--color-primary-dark); font-size: 1.02rem; line-height: 1.2; }
.brand-text span { font-size: 0.7rem; color: var(--color-muted); letter-spacing: 0.5px; }

.nav-links { display: flex; align-items: center; gap: 6px; }
.nav-links a {
  padding: 8px 14px; border-radius: 8px; font-weight: 500; color: var(--color-text);
  transition: var(--transition);
}
.nav-links a:hover, .nav-links a.active { color: var(--color-primary); background: rgba(13,115,119,0.08); }
.nav-links .btn { margin-left: 8px; padding: 9px 20px; }

.nav-toggle {
  display: none; background: none; border: none; cursor: pointer;
  width: 44px; height: 44px; padding: 10px;
}
.nav-toggle span {
  display: block; height: 2.5px; background: var(--color-primary-dark); border-radius: 2px;
  transition: var(--transition);
}
.nav-toggle span + span { margin-top: 5px; }
.nav-toggle.open span:nth-child(1) { transform: translateY(7.5px) rotate(45deg); }
.nav-toggle.open span:nth-child(2) { opacity: 0; }
.nav-toggle.open span:nth-child(3) { transform: translateY(-7.5px) rotate(-45deg); }

/* ---------- 6) Hero ---------- */
.hero {
  position: relative;
  color: #fff;
  background: linear-gradient(120deg, rgba(9,82,85,0.92), rgba(13,115,119,0.78)),
    url("https://loremflickr.com/1600/900/livingroom,furniture?lock=11") center/cover no-repeat;
  padding: 84px 0;
}
.hero-grid { display: grid; gap: 28px; align-items: center; }
.hero h1 { font-size: clamp(2rem, 6vw, 3.2rem); font-weight: 800; line-height: 1.18; margin-bottom: 16px; }
.hero h1 .heart { color: var(--color-accent); }
.hero p { font-size: 1.1rem; max-width: 560px; margin-bottom: 26px; opacity: 0.95; }
.hero-actions { display: flex; flex-wrap: wrap; gap: 14px; }
.hero-badges { display: flex; flex-wrap: wrap; gap: 18px; margin-top: 30px; }
.hero-badges span { display: flex; align-items: center; gap: 8px; font-size: 0.92rem; opacity: 0.95; }

/* ---------- 7) แถบสถิติ / ความน่าเชื่อถือ ---------- */
.stats {
  background: var(--color-primary-dark); color: #fff; padding: 36px 0;
}
.stats-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 22px; text-align: center; }
.stat strong { display: block; font-size: clamp(1.8rem, 5vw, 2.6rem); font-weight: 800; color: #fff; }
.stat span { font-size: 0.9rem; opacity: 0.85; }

/* ---------- 8) จุดเด่น (Features) ---------- */
.features-grid { display: grid; gap: 22px; }
.feature {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius); padding: 28px 24px; text-align: center;
  transition: var(--transition);
}
.feature:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); border-color: transparent; }
.feature .icon {
  width: 60px; height: 60px; margin: 0 auto 16px; border-radius: 16px;
  display: grid; place-items: center; font-size: 1.6rem;
  background: rgba(13,115,119,0.10); color: var(--color-primary);
}
.feature h3 { color: var(--color-primary-dark); margin-bottom: 8px; font-size: 1.12rem; }
.feature p { color: var(--color-muted); font-size: 0.95rem; }

/* ---------- 9) การ์ดสินค้า (Product Cards) ---------- */
.products-grid {
  display: grid; gap: 22px;
  grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
}
.product-card {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius); overflow: hidden; display: flex; flex-direction: column;
  transition: var(--transition);
}
.product-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.product-media { position: relative; aspect-ratio: 4/3; overflow: hidden; background: #eee; }
.product-media img { width: 100%; height: 100%; object-fit: cover; transition: transform 0.4s ease; }
.product-card:hover .product-media img { transform: scale(1.06); }
.product-tag {
  position: absolute; top: 12px; left: 12px; background: var(--color-accent);
  color: #fff; font-size: 0.72rem; font-weight: 600; padding: 4px 10px; border-radius: 50px;
}
.product-body { padding: 16px 16px 18px; display: flex; flex-direction: column; gap: 8px; flex: 1; }
.product-cat { font-size: 0.75rem; color: var(--color-secondary); font-weight: 600; text-transform: uppercase; letter-spacing: 0.5px; }
.product-body h3 { font-size: 1.02rem; color: var(--color-primary-dark); }
.product-body .desc { font-size: 0.86rem; color: var(--color-muted); flex: 1; }
.product-foot { display: flex; align-items: center; justify-content: space-between; margin-top: 6px; }
.price { font-size: 1.15rem; font-weight: 800; color: var(--color-accent); }
.price small { font-size: 0.78rem; color: var(--color-muted); font-weight: 400; text-decoration: line-through; margin-left: 4px; }
.product-foot .btn { padding: 8px 16px; font-size: 0.85rem; }

/* ---------- 10) แถบค้นหา & ตัวกรองสินค้า ---------- */
.shop-toolbar { display: grid; gap: 16px; margin-bottom: 28px; }
.search-box { position: relative; }
.search-box input {
  width: 100%; padding: 13px 16px 13px 44px; border: 1px solid var(--color-border);
  border-radius: 50px; font-family: var(--font); font-size: 1rem; background: #fff;
}
.search-box input:focus { outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(13,115,119,0.12); }
.search-box::before {
  content: "🔍"; position: absolute; left: 16px; top: 50%; transform: translateY(-50%); font-size: 0.95rem; opacity: 0.6;
}
.filters { display: flex; flex-wrap: wrap; gap: 8px; }
.filter-btn {
  padding: 8px 16px; border: 1px solid var(--color-border); background: #fff;
  border-radius: 50px; cursor: pointer; font-family: var(--font); font-size: 0.88rem; color: var(--color-text);
  transition: var(--transition);
}
.filter-btn:hover { border-color: var(--color-primary); color: var(--color-primary); }
.filter-btn.active { background: var(--color-primary); color: #fff; border-color: var(--color-primary); }
.no-result { text-align: center; color: var(--color-muted); padding: 40px 0; grid-column: 1 / -1; display: none; }

/* ---------- 11) รีวิวลูกค้า (Testimonials) ---------- */
.testimonials-grid { display: grid; gap: 22px; }
.testimonial {
  background: var(--color-surface); border: 1px solid var(--color-border);
  border-radius: var(--radius); padding: 24px; box-shadow: var(--shadow);
}
.testimonial .stars { color: var(--color-gold); margin-bottom: 10px; }
.testimonial p { font-size: 0.95rem; color: var(--color-text); margin-bottom: 16px; }
.testimonial .person { display: flex; align-items: center; gap: 12px; }
.testimonial .person img { width: 46px; height: 46px; border-radius: 50%; }
.testimonial .person strong { display: block; font-size: 0.95rem; color: var(--color-primary-dark); }
.testimonial .person span { font-size: 0.8rem; color: var(--color-muted); }

/* ---------- 12) โลโก้พาร์ทเนอร์ ---------- */
.partners { background: #fff; border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
.partners-grid { display: flex; flex-wrap: wrap; justify-content: center; gap: 22px 40px; align-items: center; }
.partner-logo {
  font-weight: 700; color: var(--color-muted); font-size: 1.1rem; opacity: 0.7;
  display: flex; align-items: center; gap: 8px; letter-spacing: 0.5px;
}
.partner-logo:hover { opacity: 1; color: var(--color-primary); }

/* ---------- 13) แถบ CTA ---------- */
.cta-band {
  background: linear-gradient(120deg, var(--color-primary), var(--color-secondary));
  color: #fff; text-align: center; border-radius: var(--radius); padding: 48px 24px;
}
.cta-band h2 { font-size: clamp(1.5rem, 4vw, 2.2rem); margin-bottom: 10px; }
.cta-band p { opacity: 0.95; margin-bottom: 24px; max-width: 560px; margin-inline: auto; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 14px; justify-content: center; }

/* ---------- 14) Page hero (หัวหน้าใน) ---------- */
.page-hero {
  background: linear-gradient(120deg, rgba(9,82,85,0.92), rgba(13,115,119,0.85)),
    url("https://loremflickr.com/1600/500/homeappliance?lock=22") center/cover no-repeat;
  color: #fff; text-align: center; padding: 64px 0;
}
.page-hero h1 { font-size: clamp(1.8rem, 5vw, 2.8rem); margin-bottom: 10px; font-weight: 800; }
.page-hero p { opacity: 0.95; max-width: 620px; margin: 0 auto; }
.breadcrumb { font-size: 0.85rem; opacity: 0.85; margin-top: 12px; }
.breadcrumb a:hover { text-decoration: underline; }

/* ---------- 15) ขั้นตอนสั่งซื้อ (Steps) ---------- */
.steps-grid { display: grid; gap: 22px; counter-reset: step; }
.step {
  background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius);
  padding: 28px 24px; position: relative;
}
.step::before {
  counter-increment: step; content: counter(step);
  position: absolute; top: -18px; left: 24px; width: 40px; height: 40px;
  background: var(--color-accent); color: #fff; border-radius: 50%;
  display: grid; place-items: center; font-weight: 800; box-shadow: var(--shadow);
}
.step h3 { color: var(--color-primary-dark); margin: 10px 0 8px; font-size: 1.1rem; }
.step p { color: var(--color-muted); font-size: 0.92rem; }

/* ---------- 16) ตาราง (บัญชีธนาคาร/ค่าส่ง) ---------- */
.table-wrap { overflow-x: auto; border-radius: var(--radius); border: 1px solid var(--color-border); box-shadow: var(--shadow); }
table { width: 100%; border-collapse: collapse; background: #fff; min-width: 460px; }
thead { background: var(--color-primary); color: #fff; }
th, td { padding: 14px 16px; text-align: left; border-bottom: 1px solid var(--color-border); }
th { font-weight: 600; font-size: 0.92rem; }
tbody tr:last-child td { border-bottom: none; }
tbody tr:hover { background: rgba(13,115,119,0.04); }
.bank-name { display: flex; align-items: center; gap: 10px; font-weight: 600; }
.bank-dot { width: 28px; height: 28px; border-radius: 8px; display: grid; place-items: center; color: #fff; font-size: 0.8rem; font-weight: 700; }

/* ---------- 17) Cards 2 คอลัมน์ (วิธีชำระเงิน) ---------- */
.pay-grid { display: grid; gap: 22px; }
.pay-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); }
.pay-card h3 { color: var(--color-primary-dark); display: flex; align-items: center; gap: 10px; margin-bottom: 14px; font-size: 1.15rem; }
.pay-card ul { display: grid; gap: 10px; }
.pay-card li { display: flex; gap: 10px; align-items: flex-start; font-size: 0.95rem; color: var(--color-text); }
.pay-card li::before { content: "✔"; color: var(--color-primary); font-weight: 700; }
.promptpay-box {
  margin-top: 16px; padding: 16px; background: rgba(13,115,119,0.06);
  border-radius: var(--radius-sm); text-align: center;
}
.promptpay-box strong { color: var(--color-primary-dark); font-size: 1.2rem; letter-spacing: 1px; }

/* ---------- 18) FAQ (Accordion) ---------- */
.faq-list { max-width: 800px; margin: 0 auto; display: grid; gap: 12px; }
.faq-item { background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius-sm); overflow: hidden; }
.faq-q {
  width: 100%; text-align: left; background: none; border: none; cursor: pointer;
  padding: 18px 20px; font-family: var(--font); font-size: 1rem; font-weight: 600; color: var(--color-primary-dark);
  display: flex; justify-content: space-between; align-items: center; gap: 12px;
}
.faq-q .plus { transition: var(--transition); flex-shrink: 0; font-size: 1.2rem; color: var(--color-accent); }
.faq-item.open .faq-q .plus { transform: rotate(45deg); }
.faq-a { max-height: 0; overflow: hidden; transition: max-height 0.3s ease; }
.faq-a p { padding: 0 20px 18px; color: var(--color-muted); font-size: 0.94rem; }

/* ---------- 19) หน้า Contact ---------- */
.contact-grid { display: grid; gap: 30px; }
.info-card { background: var(--color-surface); border: 1px solid var(--color-border); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); }
.info-card h2 { color: var(--color-primary-dark); margin-bottom: 18px; font-size: 1.3rem; }
.info-list { display: grid; gap: 16px; }
.info-list li { display: flex; gap: 14px; align-items: flex-start; }
.info-list .ico {
  width: 42px; height: 42px; flex-shrink: 0; border-radius: 12px; display: grid; place-items: center;
  background: rgba(13,115,119,0.10); color: var(--color-primary); font-size: 1.1rem;
}
.info-list strong { display: block; color: var(--color-primary-dark); font-size: 0.95rem; }
.info-list span, .info-list a { color: var(--color-muted); font-size: 0.92rem; }
.info-list a:hover { color: var(--color-primary); }

/* ---------- 20) ฟอร์ม ---------- */
.form { display: grid; gap: 16px; }
.form-row { display: grid; gap: 16px; }
.field label { display: block; font-weight: 600; font-size: 0.9rem; margin-bottom: 6px; color: var(--color-text); }
.field label .req { color: var(--color-accent); }
.field input, .field textarea, .field select {
  width: 100%; padding: 12px 14px; border: 1px solid var(--color-border); border-radius: var(--radius-sm);
  font-family: var(--font); font-size: 0.98rem; background: #fff; transition: var(--transition);
}
.field textarea { resize: vertical; min-height: 120px; }
.field input:focus, .field textarea:focus, .field select:focus {
  outline: none; border-color: var(--color-primary); box-shadow: 0 0 0 3px rgba(13,115,119,0.12);
}
.field.invalid input, .field.invalid textarea { border-color: var(--color-accent); }
.field .error { color: var(--color-accent); font-size: 0.82rem; margin-top: 5px; display: none; }
.field.invalid .error { display: block; }
.form-note { font-size: 0.85rem; color: var(--color-muted); }
.form-success {
  display: none; background: rgba(13,115,119,0.10); color: var(--color-primary-dark);
  padding: 14px 18px; border-radius: var(--radius-sm); border: 1px solid var(--color-primary);
  font-weight: 600;
}
.form-success.show { display: block; }

/* ---------- 21) แผนที่ ---------- */
.map-wrap { border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); border: 1px solid var(--color-border); }
.map-wrap iframe { width: 100%; height: 360px; border: 0; display: block; }

/* ---------- 22) Footer ---------- */
.site-footer { background: #0a2628; color: #cfe0e0; padding: 50px 0 24px; margin-top: 20px; }
.footer-grid { display: grid; gap: 30px; margin-bottom: 30px; }
.footer-col h4 { color: #fff; margin-bottom: 14px; font-size: 1.05rem; }
.footer-col p, .footer-col li, .footer-col a { font-size: 0.9rem; color: #a9c2c2; line-height: 1.9; }
.footer-col a:hover { color: var(--color-accent); }
.footer-brand .brand { margin-bottom: 14px; }
.footer-brand .brand-text strong { color: #fff; }
.footer-brand .brand-text span { color: #88a3a3; }
.footer-social { display: flex; gap: 10px; margin-top: 14px; }
.footer-social a {
  width: 38px; height: 38px; border-radius: 10px; display: grid; place-items: center;
  background: rgba(255,255,255,0.08); transition: var(--transition);
}
.footer-social a:hover { background: var(--color-accent); }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,0.12); padding-top: 18px; text-align: center;
  font-size: 0.85rem; color: #88a3a3;
}
.footer-bottom .reg { display: block; margin-top: 4px; opacity: 0.8; }

/* ---------- 23) Scroll reveal (animation) ---------- */
.reveal { opacity: 0; transform: translateY(24px); transition: opacity 0.6s ease, transform 0.6s ease; }
.reveal.visible { opacity: 1; transform: none; }

/* ============================================================
   24) RESPONSIVE — Tablet (>= 680px)
   ============================================================ */
@media (min-width: 680px) {
  .stats-grid { grid-template-columns: repeat(4, 1fr); }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .testimonials-grid { grid-template-columns: repeat(2, 1fr); }
  .steps-grid { grid-template-columns: repeat(2, 1fr); }
  .pay-grid { grid-template-columns: repeat(2, 1fr); }
  .footer-grid { grid-template-columns: 2fr 1fr 1fr; }
  .form-row { grid-template-columns: 1fr 1fr; }
  .shop-toolbar { grid-template-columns: 1fr auto; align-items: center; }
}

/* ============================================================
   25) RESPONSIVE — Desktop (>= 960px)
   ============================================================ */
@media (min-width: 960px) {
  .hero-grid { grid-template-columns: 1.1fr 0.9fr; }
  .features-grid { grid-template-columns: repeat(4, 1fr); }
  .testimonials-grid { grid-template-columns: repeat(3, 1fr); }
  .steps-grid { grid-template-columns: repeat(4, 1fr); }
  .contact-grid { grid-template-columns: 1fr 1.2fr; align-items: start; }
  .footer-grid { grid-template-columns: 2fr 1fr 1fr 1.2fr; }
}

/* ============================================================
   26) RESPONSIVE — เมนูมือถือ (< 880px)
   ============================================================ */
@media (max-width: 880px) {
  .nav-toggle { display: block; }
  .nav-links {
    position: fixed; inset: 70px 0 auto 0;
    flex-direction: column; align-items: stretch; gap: 4px;
    background: #fff; padding: 16px 18px 24px;
    border-bottom: 1px solid var(--color-border);
    box-shadow: var(--shadow-lg);
    transform: translateY(-120%); transition: transform 0.3s ease; opacity: 0; visibility: hidden;
  }
  .nav-links.open { transform: translateY(0); opacity: 1; visibility: visible; }
  .nav-links a { padding: 12px 14px; }
  .nav-links .btn { margin: 8px 0 0; }
}