/* CSS Reset & Variables */
:root {
    --primary: #0d9488;
    --primary-hover: #0f766e;
    --primary-glow: rgba(13, 148, 136, 0.12);
    --secondary: #0ea5e9;
    --secondary-hover: #0284c7;
    --accent: #f59e0b;
    --dark: #0f172a;
    --dark-2: #1e293b;
    --light: #f0fdfa;
    --border: #e2e8f0;
    --text-main: #334155;
    --text-muted: #64748b;
    --white: #ffffff;
    --font-sans: 'Inter', 'Noto Sans Thai', sans-serif;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.08);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0,0,0,0.1), 0 10px 10px -5px rgba(0,0,0,0.04);
    --shadow-primary: 0 10px 20px -3px rgba(13,148,136,0.3);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --radius: 12px;
    --radius-lg: 20px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
    font-family: var(--font-sans);
    background-color: var(--white);
    color: var(--text-main);
    line-height: 1.7;
    overflow-x: hidden;
}
a { text-decoration: none; color: inherit; transition: var(--transition); }
img { max-width: 100%; height: auto; display: block; }

/* Utilities */
.container { width: 100%; max-width: 1200px; margin: 0 auto; padding: 0 1.5rem; }
.text-center { text-align: center; }
.text-white { color: var(--white); }
.text-success { color: var(--primary); }
.text-warning { color: var(--accent); }
.text-primary { color: var(--primary); }
.text-light-muted { color: #94a3b8; }
.section-padding { padding: 6rem 0; }
.bg-light { background-color: var(--light); }
.gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}
.sub-title {
    display: inline-block;
    font-size: 0.85rem;
    font-weight: 700;
    letter-spacing: 0.12em;
    color: var(--primary);
    text-transform: uppercase;
    margin-bottom: 0.75rem;
}
.sub-title-light { color: var(--accent); }
.section-desc {
    font-size: 1.1rem;
    color: var(--text-muted);
    max-width: 650px;
    margin: 0.5rem auto 3rem auto;
}
h2 {
    font-size: 2.5rem;
    font-weight: 800;
    color: var(--dark);
    margin-bottom: 0.5rem;
    line-height: 1.25;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: var(--radius);
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-family: var(--font-sans);
}
.btn-lg { padding: 1rem 2rem; font-size: 1.05rem; }
.btn-block { display: flex; width: 100%; }
.btn-primary {
    background: linear-gradient(135deg, var(--primary), var(--primary-hover));
    color: var(--white);
    box-shadow: var(--shadow-primary);
}
.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 14px 28px -5px rgba(13,148,136,0.45);
}
.btn-secondary {
    background-color: var(--white);
    color: var(--dark);
    border: 1.5px solid var(--border);
}
.btn-secondary:hover {
    background-color: var(--light);
    transform: translateY(-2px);
    border-color: var(--primary);
}

/* Top Contact Bar */
.top-bar {
    background-color: var(--dark);
    color: rgba(255,255,255,0.85);
    font-size: 0.82rem;
    padding: 0.5rem 0;
}
.top-bar-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.top-bar-left { display: flex; align-items: center; gap: 0.5rem; }
.top-bar-left i { color: var(--primary); }
.top-bar-right { display: flex; align-items: center; gap: 1.5rem; flex-wrap: wrap; }
.top-bar-right a {
    color: rgba(255,255,255,0.85);
    display: flex;
    align-items: center;
    gap: 0.4rem;
    font-weight: 500;
}
.top-bar-right a:hover { color: var(--primary); }
.top-bar-right a i { font-size: 0.9rem; }

/* Navbar */
.navbar {
    position: sticky;
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    background-color: rgba(255,255,255,0.92);
    backdrop-filter: blur(16px);
    border-bottom: 1px solid rgba(226,232,240,0.8);
    padding: 0.75rem 0;
    transition: var(--transition);
}
.navbar .container { display: flex; align-items: center; justify-content: space-between; }
.logo { font-size: 1.5rem; font-weight: 800; color: var(--dark); display: flex; align-items: center; gap: 0.5rem; }
.logo span span { color: var(--primary); }
.brand-icon { color: var(--primary); animation: pulse 2s infinite; }
.nav-menu { display: flex; align-items: center; gap: 1.5rem; }
.nav-link { font-size: 0.9rem; font-weight: 500; color: var(--text-main); }
.nav-link:hover { color: var(--primary); }
.menu-toggle { display: none; font-size: 1.5rem; background: none; border: none; cursor: pointer; color: var(--dark); }

/* Hero */
.hero {
    position: relative;
    padding-top: 7rem;
    padding-bottom: 5rem;
    overflow: hidden;
    background: radial-gradient(circle at 80% 20%, rgba(13,148,136,0.05), transparent 50%),
                radial-gradient(circle at 10% 80%, rgba(14,165,233,0.04), transparent 50%);
}
.hero-glow, .hero-glow-2 {
    position: absolute;
    width: 400px;
    height: 400px;
    pointer-events: none;
    filter: blur(60px);
    border-radius: 50%;
}
.hero-glow { background: rgba(13,148,136,0.08); top: 10%; right: 15%; }
.hero-glow-2 { background: rgba(14,165,233,0.06); bottom: 10%; left: 10%; }
.hero-grid { display: grid; grid-template-columns: 1.1fr 0.9fr; gap: 4rem; align-items: center; }
.badge {
    display: inline-flex; align-items: center; gap: 0.5rem;
    background-color: var(--primary-glow); color: var(--primary);
    padding: 0.5rem 1rem; border-radius: 99px; font-size: 0.85rem;
    font-weight: 600; margin-bottom: 1.5rem;
}
.hero-content h1 { font-size: 3.25rem; line-height: 1.2; color: var(--dark); margin-bottom: 1.5rem; font-weight: 800; }
.hero-content p { font-size: 1.1rem; color: var(--text-muted); margin-bottom: 2.5rem; max-width: 560px; }
.hero-actions { display: flex; gap: 1rem; margin-bottom: 3rem; flex-wrap: wrap; }
.hero-stats { display: flex; gap: 3rem; border-top: 1px solid var(--border); padding-top: 2rem; }
.stat-item h3 { font-size: 2rem; font-weight: 800; color: var(--dark); margin-bottom: 0.25rem; }
.stat-item p { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 0; }
.hero-visual { position: relative; }
.image-wrapper { position: relative; z-index: 2; }
.hero-img { border-radius: 24px; box-shadow: var(--shadow-xl); object-fit: cover; height: 460px; width: 100%; }
.floating-card {
    position: absolute;
    background: rgba(255,255,255,0.92);
    backdrop-filter: blur(8px);
    border: 1px solid rgba(226,232,240,0.8);
    padding: 1rem 1.25rem; border-radius: 16px;
    box-shadow: var(--shadow-lg);
    display: flex; align-items: center; gap: 1rem; z-index: 10;
}
.floating-card i { font-size: 1.5rem; }
.floating-card h4 { font-size: 0.9rem; font-weight: 700; color: var(--dark); margin-bottom: 0.1rem; }
.floating-card p { font-size: 0.78rem; color: var(--text-muted); }
.card-1 { top: 15%; left: -12%; animation: float 6s ease-in-out infinite; }
.card-2 { bottom: 15%; right: -5%; animation: float 6s ease-in-out infinite 3s; }

/* Services - 8 Card Grid */
.services-grid-8 {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 1.5rem;
    margin-top: 1rem;
}
.service-card-mini {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 2rem 1.5rem;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}
.service-card-mini:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
    border-color: var(--primary-glow);
}
.service-card-mini .service-icon {
    width: 56px; height: 56px;
    border-radius: 14px;
    background: var(--primary-glow);
    color: var(--primary);
    display: flex; align-items: center; justify-content: center;
    font-size: 1.4rem; margin: 0 auto 1.25rem auto;
    transition: var(--transition);
}
.service-card-mini:hover .service-icon {
    background: var(--primary); color: var(--white); transform: scale(1.1);
}
.service-card-mini h3 { font-size: 1.1rem; font-weight: 700; color: var(--dark); margin-bottom: 0.75rem; }
.service-card-mini p { color: var(--text-muted); font-size: 0.85rem; margin-bottom: 1.25rem; line-height: 1.6; }
.price-start { font-weight: 700; color: var(--primary); font-size: 0.95rem; }
.highlighted-mini { border-color: var(--primary); box-shadow: 0 8px 24px rgba(13,148,136,0.1); }
.highlighted-mini::before {
    content: ''; position: absolute; top: 0; left: 0; width: 100%; height: 3px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
}
.badge-hot {
    position: absolute; top: 1rem; right: 1rem;
    background: var(--accent); color: var(--white);
    font-size: 0.7rem; font-weight: 700;
    padding: 0.2rem 0.6rem; border-radius: 99px;
}

/* Why Choose Us Section */
.bg-dark-gradient {
    background: linear-gradient(135deg, #0f172a 0%, #1e3a5f 50%, #0f172a 100%);
}
.why-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 2rem;
    margin-top: 3rem;
}
.why-card {
    background: rgba(255,255,255,0.05);
    border: 1px solid rgba(255,255,255,0.1);
    border-radius: var(--radius-lg);
    padding: 2.5rem 2rem;
    text-align: center;
    transition: var(--transition);
}
.why-card:hover {
    background: rgba(255,255,255,0.1);
    transform: translateY(-6px);
}
.why-icon {
    width: 64px; height: 64px;
    border-radius: 50%;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: var(--white); display: flex; align-items: center; justify-content: center;
    font-size: 1.5rem; margin: 0 auto 1.5rem auto;
}
.why-card h3 { color: var(--accent); font-size: 1.1rem; font-weight: 800; text-transform: uppercase; margin-bottom: 0.25rem; }
.why-card h4 { color: var(--white); font-size: 1rem; font-weight: 600; margin-bottom: 1rem; }
.why-card p { color: #94a3b8; font-size: 0.9rem; }

/* Calculator */
.calc-grid { display: grid; grid-template-columns: 0.9fr 1.1fr; gap: 4rem; align-items: center; }
.calc-content h2 { font-size: 2.25rem; }
.benefit-list { list-style: none; margin-top: 2rem; }
.benefit-list li { display: flex; align-items: center; gap: 0.75rem; font-weight: 500; margin-bottom: 1rem; }
.benefit-list li i { color: var(--primary); font-size: 1.1rem; }
.calc-box {
    background: var(--white); border: 1px solid var(--border);
    border-radius: var(--radius-lg); padding: 2.5rem;
    box-shadow: var(--shadow-md);
}
.calc-box h3 {
    font-size: 1.4rem; font-weight: 700; color: var(--dark);
    margin-bottom: 1.5rem; border-bottom: 1px solid var(--border);
    padding-bottom: 1rem; display: flex; align-items: center; gap: 0.5rem;
}
.form-group { margin-bottom: 1.5rem; }
.form-group label { display: block; font-size: 0.88rem; font-weight: 600; color: var(--dark); margin-bottom: 0.5rem; }
.form-control {
    width: 100%; padding: 0.75rem 1rem; font-size: 0.95rem;
    font-family: var(--font-sans); border: 1px solid var(--border);
    border-radius: var(--radius); outline: none; transition: var(--transition);
}
.form-control:focus { border-color: var(--primary); box-shadow: 0 0 0 3px var(--primary-glow); }
.range-wrapper { display: flex; align-items: center; gap: 1.5rem; }
.range-slider {
    flex: 1; height: 6px; border-radius: 99px; background: var(--border);
    outline: none; -webkit-appearance: none;
}
.range-slider::-webkit-slider-thumb {
    -webkit-appearance: none; width: 22px; height: 22px; border-radius: 50%;
    background: var(--primary); cursor: pointer;
    box-shadow: 0 2px 6px rgba(0,0,0,0.15); transition: var(--transition);
}
.range-slider::-webkit-slider-thumb:hover { transform: scale(1.15); }
.range-val { font-weight: 700; color: var(--primary); font-size: 1.1rem; min-width: 90px; text-align: right; }
.checkbox-group { display: flex; flex-direction: column; gap: 0.75rem; }
.checkbox-container {
    display: flex; align-items: center; position: relative; padding-left: 2rem;
    cursor: pointer; font-size: 0.88rem; user-select: none; font-weight: 500;
}
.checkbox-container input { position: absolute; opacity: 0; cursor: pointer; height: 0; width: 0; }
.checkmark {
    position: absolute; top: 0; left: 0; height: 20px; width: 20px;
    background-color: var(--white); border: 1.5px solid var(--border);
    border-radius: 6px; transition: var(--transition);
}
.checkbox-container:hover input ~ .checkmark { border-color: var(--primary); }
.checkbox-container input:checked ~ .checkmark { background-color: var(--primary); border-color: var(--primary); }
.checkmark:after { content: ""; position: absolute; display: none; }
.checkbox-container input:checked ~ .checkmark:after { display: block; }
.checkbox-container .checkmark:after { left: 7px; top: 3px; width: 5px; height: 10px; border: solid white; border-width: 0 2px 2px 0; transform: rotate(45deg); }
.price-breakdown {
    display: flex; flex-direction: column; gap: 0.35rem;
    background: rgba(241,245,249,0.8);
    padding: 1rem 1.25rem; border-radius: var(--radius);
    margin-bottom: 0.75rem; font-size: 0.82rem;
}
.price-breakdown span {
    display: flex; justify-content: space-between;
    color: var(--text-muted); font-weight: 500;
}
.price-result {
    display: flex; align-items: center; justify-content: space-between;
    background: linear-gradient(135deg, var(--primary-glow), rgba(14,165,233,0.08));
    padding: 1.25rem 1.5rem; border-radius: var(--radius); margin: 2rem 0;
}
.price-label { font-weight: 600; color: var(--dark); }
.price-amount { font-size: 1.75rem; font-weight: 800; color: var(--primary); }

/* Client / Trust Section */
.client-logos {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 1.5rem;
    margin: 2rem 0 3rem 0;
}
.client-logo-item {
    display: flex; flex-direction: column; align-items: center; gap: 0.75rem;
    padding: 1.5rem 1rem; border-radius: var(--radius-lg);
    background: var(--white); border: 1px solid var(--border);
    transition: var(--transition);
}
.client-logo-item:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--primary); }
.client-logo-item i { font-size: 2rem; color: var(--primary); }
.client-logo-item span { font-size: 0.85rem; font-weight: 600; color: var(--dark); }
.trust-badges { display: flex; justify-content: center; gap: 2rem; flex-wrap: wrap; }
.trust-badge {
    display: flex; align-items: center; gap: 0.5rem;
    background: var(--white); border: 1px solid var(--border);
    padding: 0.75rem 1.5rem; border-radius: 99px;
    font-size: 0.88rem; font-weight: 600; color: var(--dark);
}
.trust-badge i { color: var(--accent); font-size: 1.1rem; }

/* Articles / Blog */
.articles-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
    margin-top: 1rem;
    text-align: left;
}
.article-card {
    background: var(--white); border: 1px solid var(--border);
    border-radius: var(--radius-lg); overflow: hidden;
    transition: var(--transition);
}
.article-card:hover { transform: translateY(-6px); box-shadow: var(--shadow-lg); }
.article-img { position: relative; overflow: hidden; height: 200px; }
.article-img img { width: 100%; height: 100%; object-fit: cover; transition: var(--transition); }
.article-card:hover .article-img img { transform: scale(1.05); }
.article-tag {
    position: absolute; top: 1rem; left: 1rem;
    background: var(--primary); color: var(--white);
    font-size: 0.75rem; font-weight: 700;
    padding: 0.25rem 0.75rem; border-radius: 99px;
}
.article-body { padding: 1.5rem; }
.article-body h3 { font-size: 1.1rem; font-weight: 700; color: var(--dark); margin-bottom: 0.75rem; line-height: 1.4; }
.article-body p { font-size: 0.88rem; color: var(--text-muted); margin-bottom: 1rem; }
.read-more { font-size: 0.88rem; font-weight: 600; color: var(--primary); display: flex; align-items: center; gap: 0.4rem; }
.read-more:hover { gap: 0.8rem; }

/* Location */
.location-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
    margin-top: 1rem;
}
.loc-card {
    background: var(--white); border: 1px solid var(--border);
    padding: 2rem; border-radius: var(--radius-lg);
    text-align: left; transition: var(--transition);
}
.loc-card:hover { border-color: var(--primary); transform: translateY(-4px); box-shadow: var(--shadow-md); }
.loc-card h4 { font-size: 1.1rem; font-weight: 700; color: var(--dark); margin-bottom: 0.75rem; display: flex; align-items: center; gap: 0.5rem; }
.loc-card h4 i { color: var(--primary); }
.loc-card p { font-size: 0.88rem; color: var(--text-muted); }

/* FAQ */
.faq-list { max-width: 750px; margin: 3rem auto 0; display: flex; flex-direction: column; gap: 1rem; }
.faq-item { background: var(--white); border: 1px solid var(--border); border-radius: 14px; overflow: hidden; transition: var(--transition); }
.faq-question {
    width: 100%; background: none; border: none; padding: 1.5rem;
    display: flex; justify-content: space-between; align-items: center;
    font-size: 1rem; font-weight: 600; color: var(--dark);
    cursor: pointer; font-family: var(--font-sans); text-align: left;
}
.faq-question i { font-size: 0.85rem; color: var(--primary); transition: var(--transition); flex-shrink: 0; }
.faq-answer { max-height: 0; overflow: hidden; transition: max-height 0.4s ease; padding: 0 1.5rem; }
.faq-answer p { color: var(--text-muted); font-size: 0.95rem; padding-bottom: 1.5rem; line-height: 1.8; }
.faq-item.active { border-color: var(--primary-glow); box-shadow: var(--shadow-sm); }
.faq-item.active .faq-answer { max-height: 300px; }
.faq-item.active .faq-question i { transform: rotate(45deg); }

/* Footer */
.footer { background-color: var(--dark); color: #94a3b8; padding: 5rem 0 2rem; font-size: 0.92rem; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr 0.8fr; gap: 3rem; margin-bottom: 4rem; }
.footer-logo { color: var(--white); margin-bottom: 1.5rem; }
.footer-logo span span { color: var(--primary); }
.footer-info p { margin-bottom: 1.5rem; line-height: 1.7; }
.contact-details p { display: flex; align-items: center; gap: 0.75rem; margin-bottom: 0.75rem; }
.contact-details p i { font-size: 1rem; }
.contact-details a:hover { color: var(--white); }
.footer-links h4, .footer-social h4 { color: var(--white); font-size: 1.05rem; font-weight: 700; margin-bottom: 1.5rem; }
.footer-links ul { list-style: none; }
.footer-links ul li { margin-bottom: 0.6rem; }
.footer-links ul li a:hover { color: var(--white); padding-left: 4px; }
.social-icons { display: flex; gap: 0.75rem; }
.social-icons a {
    width: 40px; height: 40px; border-radius: 50%;
    background: rgba(255,255,255,0.06);
    display: flex; align-items: center; justify-content: center; color: var(--white);
    font-size: 1rem;
}
.social-icons a:hover { background: var(--primary); transform: translateY(-3px); }
.footer-bottom { border-top: 1px solid rgba(255,255,255,0.08); padding-top: 2rem; font-size: 0.82rem; }

/* Floating Contact Buttons */
.floating-contacts {
    position: fixed; bottom: 1.5rem; right: 1.5rem;
    display: flex; flex-direction: column; gap: 0.75rem;
    z-index: 999;
}
.float-btn {
    width: 52px; height: 52px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    color: var(--white); font-size: 1.4rem;
    box-shadow: var(--shadow-lg); transition: var(--transition);
}
.float-btn:hover { transform: scale(1.12); }
.float-phone { background: linear-gradient(135deg, #3b82f6, #1d4ed8); }
.float-line { background: linear-gradient(135deg, #06c755, #04a849); }
.float-messenger { background: linear-gradient(135deg, #0084ff, #0062cc); }

/* Animations */
@keyframes float { 0% { transform: translateY(0px); } 50% { transform: translateY(-12px); } 100% { transform: translateY(0px); } }
@keyframes pulse { 0% { transform: scale(1); } 50% { transform: scale(1.08); opacity: 0.9; } 100% { transform: scale(1); } }

/* Responsive */
@media (max-width: 1100px) {
    .services-grid-8 { grid-template-columns: repeat(2, 1fr); }
    .why-grid { grid-template-columns: repeat(2, 1fr); }
    .client-logos { grid-template-columns: repeat(3, 1fr); }
}
@media (max-width: 991px) {
    .section-padding { padding: 4rem 0; }
    .hero { padding-top: 5rem; }
    .hero-grid { grid-template-columns: 1fr; gap: 3rem; }
    .hero-img { height: 360px; }
    .calc-grid { grid-template-columns: 1fr; gap: 3rem; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
    .location-grid { grid-template-columns: repeat(2, 1fr); }
    .articles-grid { grid-template-columns: 1fr; }
}
@media (max-width: 768px) {
    h2 { font-size: 2rem; }
    .hero-content h1 { font-size: 2.5rem; }
    .navbar { padding: 0.5rem 0; }
    .menu-toggle { display: block; }
    .nav-menu {
        position: fixed; top: 55px; left: -100%; width: 100%;
        height: calc(100vh - 55px); background-color: var(--white);
        flex-direction: column; align-items: flex-start;
        padding: 2rem 1.5rem; gap: 1.25rem;
        transition: var(--transition); box-shadow: 0 4px 6px rgba(0,0,0,0.05);
        overflow-y: auto;
    }
    .nav-menu.active { left: 0; }
    .nav-cta { width: 100%; }
    .top-bar-left { display: none; }
    .top-bar-right { gap: 1rem; }
    .services-grid-8 { grid-template-columns: 1fr; }
    .why-grid { grid-template-columns: 1fr; }
    .client-logos { grid-template-columns: repeat(2, 1fr); }
    .footer-grid { grid-template-columns: 1fr; gap: 2.5rem; }
    .card-1 { left: -5%; }
    .card-2 { right: -2%; }
    .location-grid { grid-template-columns: 1fr; }
    .hero-stats { gap: 1.5rem; flex-wrap: wrap; }
}