/* J-C Sala Thai Limited — public stylesheet (jcweb, มือเขียนล้วน ไม่พึ่ง framework) */

:root {
    --color-navy: #0A2A5E;
    --color-navy-dark: #071d42;
    --color-blue: #1E88E5;
    --color-gold: #E8C88A;
    --color-teal: #14B8A6;
    --color-coral: #F4694A;
    --color-text: #1F2937;
    --color-muted: #6B7280;
    --color-bg-alt: #F4F7FB;
    --color-border: #E3E8F0;
    --font-body: 'Leelawadee UI', 'Sarabun', 'Segoe UI', Tahoma, sans-serif;
    --container: 1180px;
    --radius: 14px;
    --shadow: 0 10px 30px rgba(10, 42, 94, 0.10);
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: var(--font-body);
    color: var(--color-text);
    background: #fff;
    line-height: 1.6;
}
img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }
h1, h2, h3, h4 { margin: 0 0 .5em; line-height: 1.3; color: var(--color-navy); }
p { margin: 0 0 1em; }
.container { max-width: var(--container); margin: 0 auto; padding: 0 20px; }

.eyebrow {
    display: inline-block;
    color: var(--color-teal);
    font-weight: 700;
    letter-spacing: .06em;
    text-transform: uppercase;
    font-size: .8rem;
    margin-bottom: .5em;
}

.btn {
    display: inline-block;
    padding: .8em 1.6em;
    border-radius: 999px;
    font-weight: 600;
    border: 2px solid transparent;
    cursor: pointer;
    transition: transform .15s ease, box-shadow .15s ease;
}
.btn:hover { transform: translateY(-1px); }
.btn-teal { background: var(--color-teal); color: #fff; }
.btn-teal:hover { box-shadow: 0 8px 20px rgba(20,184,166,.35); }
.btn-outline { background: transparent; border-color: rgba(255,255,255,.7); color: #fff; }
.btn-outline:hover { background: rgba(255,255,255,.12); }
.btn-navy { background: var(--color-navy); color: #fff; }

/* ===== Header ===== */
.site-header {
    position: sticky;
    top: 0;
    z-index: 100;
    background: #fff;
    border-bottom: 1px solid var(--color-border);
}
.header-row-brand {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 16px;
    padding: 14px 20px 10px;
}
.header-row-nav {
    display: flex;
    align-items: center;
    justify-content: flex-end;
    gap: 16px;
    padding: 10px 20px 14px;
    border-top: 1px solid var(--color-border);
}
.brand { display: flex; align-items: center; gap: 10px; font-weight: 800; color: var(--color-navy); font-size: 1.1rem; }
.brand img { height: 38px; width: auto; }
.main-nav { display: flex; align-items: center; gap: 26px; }
.main-nav a { font-weight: 600; color: var(--color-navy); padding: 6px 0; border-bottom: 2px solid transparent; }
.main-nav a.active, .main-nav a:hover { border-color: var(--color-teal); color: var(--color-teal); }
.lang-switch-flag {
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    padding: 2px;
    border: 1px solid var(--color-border);
    border-radius: 5px;
    line-height: 0;
    transition: border-color .15s ease, transform .15s ease;
}
.lang-switch-flag:hover { border-color: var(--color-teal); transform: translateY(-1px); }
.lang-switch-flag svg { display: block; border-radius: 2px; }
.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    gap: 5px;
    width: 40px;
    height: 40px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}
.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    border-radius: 2px;
    background: var(--color-navy);
    transition: transform .25s ease, opacity .2s ease;
}
.nav-toggle[aria-expanded="true"] span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.nav-toggle[aria-expanded="true"] span:nth-child(2) { opacity: 0; }
.nav-toggle[aria-expanded="true"] span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

.nav-backdrop {
    display: none;
    position: fixed;
    inset: 0;
    background: rgba(7, 29, 66, .45);
    z-index: 90;
    opacity: 0;
    transition: opacity .2s ease;
}
.site-header.nav-open .nav-backdrop {
    display: block;
    opacity: 1;
}

/* ===== Hero ===== */
.hero {
    position: relative;
    color: #fff;
    background: linear-gradient(rgba(7,29,66,.72), rgba(7,29,66,.82)), var(--hero-image, none) center/cover no-repeat;
    padding: 90px 0 100px;
}
.hero h1 { color: #fff; font-size: clamp(2rem, 5vw, 3.4rem); letter-spacing: .02em; margin-bottom: .3em; }
.hero p { max-width: 640px; font-size: 1.15rem; color: #E7EDF7; }
.hero-actions { margin-top: 1.6em; display: flex; gap: 14px; flex-wrap: wrap; }

/* ===== Sections ===== */
.section { padding: 70px 0; }
.section-alt { background: var(--color-bg-alt); }
.section-navy { background: var(--gradient-navy, linear-gradient(135deg, var(--color-navy) 0%, var(--color-navy-dark) 100%)); color: #fff; }
.section-navy h2, .section-navy h3 { color: #fff; }
.section-head { text-align: center; max-width: 720px; margin: 0 auto 2.4em; }
.section-head.left { text-align: left; margin-left: 0; }

/* ===== About / Commitment / Core values ===== */
.about-grid { display: grid; grid-template-columns: 1fr 1.2fr; gap: 48px; align-items: center; }
.about-grid img { border-radius: var(--radius); box-shadow: var(--shadow); }

.icon-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 20px;
    margin-top: 1.6em;
}
.icon-card {
    background: #fff;
    border: 1px solid var(--color-border);
    border-radius: var(--radius);
    padding: 22px 18px;
    text-align: center;
    box-shadow: var(--shadow);
}
.icon-card .icon-circle {
    width: 52px; height: 52px; margin: 0 auto 12px;
    border-radius: 50%;
    background: color-mix(in srgb, var(--color-teal) 14%, white);
    display: flex; align-items: center; justify-content: center;
    color: var(--color-teal);
}
.icon-card h4 { margin: 0 0 .3em; font-size: 1rem; }
.icon-card p { margin: 0; font-size: .88rem; color: var(--color-muted); }

/* ===== Product / Certificate / Client cards ===== */
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 26px; }
.grid-4 { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }
.card {
    background: #fff;
    border-radius: var(--radius);
    overflow: hidden;
    border: 1px solid var(--color-border);
    box-shadow: var(--shadow);
    display: flex;
    flex-direction: column;
}
.card img { aspect-ratio: 4/3; object-fit: cover; }
.card-body { padding: 20px; flex: 1; display: flex; flex-direction: column; }
.card-body h3 { font-size: 1.15rem; }
.card-body p { color: var(--color-muted); font-size: .95rem; flex: 1; }
.card-link { margin-top: 12px; color: var(--color-teal); font-weight: 700; }

.cert-card { text-align: center; padding: 20px; background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius); }
.cert-card img { max-height: 90px; width: auto; margin: 0 auto 14px; object-fit: contain; }
.cert-card h4 { font-size: .98rem; margin-bottom: .3em; }
.cert-card p { font-size: .82rem; color: var(--color-muted); margin: 0; }

.client-row { display: grid; grid-template-columns: 220px 1fr; gap: 30px; align-items: center; background: #fff; border: 1px solid var(--color-border); border-radius: var(--radius); padding: 26px; box-shadow: var(--shadow); }
.client-row img { max-height: 70px; width: auto; object-fit: contain; }

/* ===== Org chart ===== */
.org-chart { overflow-x: auto; padding: 20px 0; }
.org-level { display: flex; gap: 24px; justify-content: center; }
.org-branch { display: flex; flex-direction: column; align-items: center; }
.org-node {
    background: var(--color-navy);
    color: #fff;
    padding: 10px 16px;
    border-radius: 10px;
    font-weight: 600;
    font-size: .88rem;
    white-space: nowrap;
    margin-bottom: 10px;
}
.org-node.root { background: var(--color-teal); }
.org-connector { width: 2px; height: 16px; background: var(--color-border); margin-bottom: 10px; }
.org-roots { display: flex; gap: 20px; justify-content: center; margin-bottom: 6px; }

/* ===== Contact band ===== */
.contact-grid { display: grid; grid-template-columns: 1fr 1fr 1fr; gap: 30px; }
.contact-info-item { display: flex; gap: 12px; margin-bottom: 18px; }
.contact-info-item .ico { color: var(--color-teal); font-size: 1.2rem; }
.map-embed iframe { width: 100%; height: 260px; border: 0; border-radius: var(--radius); }
.contact-form { background: #fff; color: var(--color-text); border-radius: var(--radius); padding: 24px; }
.form-row { margin-bottom: 14px; }
.form-row label { display: block; font-weight: 600; margin-bottom: 6px; font-size: .9rem; }
.form-row input, .form-row textarea {
    width: 100%; padding: .7em .9em; border: 1px solid var(--color-border); border-radius: 8px; font-family: inherit; font-size: .95rem;
}
.form-row textarea { min-height: 110px; resize: vertical; }
.hp-field { position: absolute; left: -9999px; top: -9999px; }
.alert { padding: 14px 18px; border-radius: 10px; margin-bottom: 20px; font-weight: 600; }
.alert-success { background: #DCFCE7; color: #166534; }
.alert-error { background: #FEE2E2; color: #991B1B; }

/* ===== Footer ===== */
.site-footer { background: var(--color-navy-dark); color: #C9D4E8; padding: 40px 0 20px; }
.footer-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 30px; margin-bottom: 30px; }
.site-footer h4 { color: #fff; font-size: 1rem; }
.site-footer a:hover { color: var(--color-teal); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,.12); padding-top: 18px; font-size: .85rem; display: flex; justify-content: space-between; flex-wrap: wrap; gap: 10px; }

/* ===== Page header (inner pages) ===== */
.page-header { background: var(--color-navy); color: #fff; padding: 60px 0; text-align: center; }
.page-header h1 { color: #fff; margin-bottom: .2em; }

/* ===== Product detail ===== */
.detail-hero { display: grid; grid-template-columns: 1fr 1fr; gap: 40px; align-items: center; }
.detail-hero img { border-radius: var(--radius); box-shadow: var(--shadow); }
.variant-list { display: grid; grid-template-columns: 1fr 1fr; gap: 20px; margin-top: 1.4em; }
.variant-card { border: 1px solid var(--color-border); border-radius: var(--radius); padding: 18px; background: var(--color-bg-alt); }

/* ===== Responsive ===== */
@media (max-width: 1024px) {
    .grid-4 { grid-template-columns: repeat(2, 1fr); }
    .icon-grid { grid-template-columns: repeat(2, 1fr); }
    .contact-grid { grid-template-columns: 1fr; }
    .about-grid { grid-template-columns: 1fr; }
}
@media (max-width: 900px) {
    .nav-toggle { display: flex; }
    .header-row-nav { border-top: 0; padding-top: 0; justify-content: flex-end; gap: 12px; }
    .main-nav {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%; left: 0; right: 0;
        background: #fff;
        padding: 8px 20px 20px;
        border-bottom: 1px solid var(--color-border);
        gap: 4px;
        z-index: 95;
        max-height: 0;
        overflow: hidden;
        opacity: 0;
        transform: translateY(-8px);
        transition: max-height .25s ease, opacity .2s ease, transform .2s ease;
    }
    .main-nav a { padding: 10px 0; border-bottom: 1px solid var(--color-border); }
    .site-header.nav-open .main-nav {
        max-height: 70vh;
        overflow-y: auto;
        opacity: 1;
        transform: translateY(0);
    }
    .site-header.nav-open { z-index: 200; }
}
@media (max-width: 768px) {
    .grid-3 { grid-template-columns: 1fr; }
    .grid-4 { grid-template-columns: 1fr 1fr; }
    .client-row { grid-template-columns: 1fr; text-align: center; }
    .detail-hero { grid-template-columns: 1fr; }
    .variant-list { grid-template-columns: 1fr; }
    .footer-grid { grid-template-columns: 1fr; }
    .hero { padding: 60px 0 70px; }
    .section { padding: 50px 0; }
}
@media (max-width: 480px) {
    .icon-grid { grid-template-columns: 1fr; }
    .grid-4 { grid-template-columns: 1fr; }
}