/* ==========================================
   SSIT Silk v2 - Clean Rewrite
   ========================================== */

:root {
    --bg-page: #F2F0ED;
    --bg-card: #FFFFFF;
    --text-primary: #2C2C2C;
    --accent-wine: #8B1A1A;
    --accent-gold: #C9A227;
    --border-light: #D4D0CB;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-serif: 'Playfair Display', Georgia, serif;
    --container-width: 1200px;
    --section-padding: 100px;
    --transition-fast: 0.3s ease;
    --transition-medium: 0.4s ease;
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body { font-family: var(--font-sans); font-size: 16px; line-height: 1.6; color: var(--text-primary); background-color: var(--bg-page); -webkit-font-smoothing: antialiased; }
img { max-width: 100%; height: auto; display: block; }
a { text-decoration: none; color: inherit; transition: color var(--transition-fast); }
ul { list-style: none; }

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

/* Fade animation */
.fade-in-up { opacity: 0; transform: translateY(60px); transition: opacity 0.8s ease, transform 0.8s ease; }
.fade-in-up.visible { opacity: 1; transform: translateY(0); }

/* Category cards: bigger entrance + stagger + diagonal */
.category-card.fade-in-up { opacity: 0; transform: translateY(180px) translateX(var(--stagger-x, 0px)); transition: opacity 1.0s ease, transform 1.0s ease; will-change: transform, opacity; }
.category-card.fade-in-up.visible { opacity: 1; transform: translateY(0) translateX(0); }
.category-card.stagger-1 { transition-delay: 0.5s, 0.5s; --stagger-x: -35px; }
.category-card.stagger-2 { transition-delay: 0.9s, 0.9s; --stagger-x: -12px; }
.category-card.stagger-3 { transition-delay: 1.3s, 1.3s; --stagger-x: 12px; }
.category-card.stagger-4 { transition-delay: 1.7s, 1.7s; --stagger-x: 35px; }

/* ---------- Navigation ---------- */
.navbar { position: fixed; top: 0; left: 0; right: 0; z-index: 1000; padding: 20px 0; transition: all var(--transition-fast); will-change: background, box-shadow, padding; }
.navbar.transparent { background: transparent; }
.navbar.scrolled { background: var(--bg-card); box-shadow: 0 2px 20px rgba(0,0,0,0.08); padding: 15px 0; }

.nav-container { max-width: 1200px; margin: 0 auto; padding: 0 24px; display: flex; align-items: center; justify-content: space-between; }

.logo { display: flex; align-items: center; min-width: 140px; }
.logo-img { height: 44px; width: auto; }
.navbar.transparent .logo-img { filter: brightness(0) invert(1); }



.nav-links { display: flex; align-items: center; gap: 32px; }
.nav-links a { font-size: 14px; font-weight: 500; letter-spacing: 0.3px; position: relative; }
.navbar.transparent .nav-links a { color: white; }
.navbar.scrolled .nav-links a { color: var(--text-primary); }
.nav-links a::after { content: ''; position: absolute; bottom: -4px; left: 0; width: 0; height: 2px; background: var(--accent-gold); transition: width var(--transition-fast); }
.nav-links a:hover::after { width: 100%; }

/* Nav CTA: transparent=white text, scrolled=wine button */
.nav-cta { white-space: nowrap; flex-shrink: 0; padding: 12px 24px; border-radius: 4px; font-size: 14px; font-weight: 600; transition: all var(--transition-fast); margin-left: auto; }
.navbar.transparent .nav-cta { background-color: transparent; color: white; border: 1px solid rgba(255,255,255,0.4); }
.navbar.transparent .nav-cta:hover { background-color: rgba(255,255,255,0.15); border-color: rgba(255,255,255,0.7); transform: none; }
.navbar.scrolled .nav-cta { background: linear-gradient(135deg, #D72F3D, #A00F18); color: white; border: none; }
.navbar.scrolled .nav-cta:hover { opacity: 0.88; transform: translateY(-2px); }

.mobile-menu-btn { display: none; flex-direction: column; gap: 5px; background: none; border: none; cursor: pointer; padding: 10px; }
.hamburger-line { width: 24px; height: 2px; background-color: currentColor; transition: all var(--transition-fast); }
.navbar.transparent .hamburger-line { background-color: white; }
.navbar.scrolled .hamburger-line { background-color: var(--text-primary); }

/* ---------- Hero ---------- */
.hero { position: relative; min-height: 100vh; display: flex; align-items: center; justify-content: center; background-image: none; overflow: hidden; }

@keyframes heroBreathe {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

.hero::before {
    will-change: transform;
    content: '';
    position: absolute;
    inset: -80px;
    background-image: url('../img/hero-silk.jpg');
    background-size: cover;
    background-position: center;
    z-index: 0;
    animation: heroBreathe 8s ease-in-out infinite; animation-play-state: paused;
}

.hero-overlay {
    display: none;
}

.hero-content { position: relative; z-index: 2; text-align: center; padding: 0 24px; max-width: 800px; }
.hero-title { font-family: var(--font-serif); font-size: clamp(36px,6vw,64px); font-weight: 500; color: white; margin-bottom: 24px; line-height: 1.2; letter-spacing: 2px; text-shadow: 0 2px 30px rgba(0,0,0,0.8), 0 0 60px rgba(0,0,0,0.5); }
.hero-subtitle { font-size: clamp(16px,2vw,20px); color: rgba(255,255,255,0.95); margin-bottom: 48px; font-weight: 400; text-shadow: 0 1px 20px rgba(0,0,0,0.8), 0 0 40px rgba(0,0,0,0.4); }

.hero-cta { display: inline-block; background-color: transparent; color: white; padding: 16px 40px; border-radius: 2px; font-size: 16px; font-weight: 600; border: 1px solid rgba(255,255,255,0.6); transition: all var(--transition-fast); }
.hero-cta:hover { background-color: rgba(255,255,255,0.15); border-color: white; transform: translateY(-3px); box-shadow: 0 10px 30px rgba(255,255,255,0.15); }

/* ---------- Categories ---------- */
.categories { padding: 0; }

.category-grid { display: flex; width: 100%; max-width: 100%; }

.category-card { position: relative; overflow: hidden; min-height: 480px; display: flex; flex-direction: column; justify-content: flex-end; padding: 48px 32px; border-right: none !important; }
.category-card-link { display: block; text-decoration: none; color: inherit; margin: 0; padding: 0; border: none; outline: none; margin-left: -1px; } .category-card-link:first-child { margin-left: 0; }

.category-card::before { content: ''; position: absolute; inset: 0; background-size: cover; background-position: center; transition: transform 0.6s ease; z-index: 0; }
.category-card:hover::before { transform: scale(1.05); }

.category-card::after { content: ''; position: absolute; inset: 0; background: linear-gradient(to top, rgba(0,0,0,0.72) 0%, rgba(0,0,0,0.3) 55%, rgba(0,0,0,0.12) 100%); z-index: 1; transition: background 0.3s ease; }
.category-card:hover::after { background: linear-gradient(to top, rgba(0,0,0,0.78) 0%, rgba(0,0,0,0.38) 55%, rgba(0,0,0,0.18) 100%); }

.category-card-link:first-child .category-card::before { background-image: url('../img/silk-card_0.jpg'); }
.category-card-link:nth-child(2) .category-card::before { background-image: url('../img/silk-card_1.jpg'); }
.category-card-link:nth-child(3) .category-card::before { background-image: url('../img/silk-card_2.jpg'); }
.category-card-link:nth-child(4) .category-card::before { background-image: url('../img/silk-card_3.jpg'); }

.category-card > * { position: relative; z-index: 2; }
.category-card .category-title { color: #fff; }
.category-card .category-desc { color: rgba(255,255,255,0.85); }
.category-card .category-link { color: #C9A227; }
.category-card .category-link::after { background-color: #C9A227; }
.category-card:hover { background-color: transparent; transform: none; box-shadow: none; }

.category-title { font-family: var(--font-serif); font-size: 22px; font-weight: 600; margin-bottom: 16px; }
.category-desc { font-size: 14px; line-height: 1.7; margin-bottom: 24px; }
.category-link { font-size: 14px; font-weight: 600; position: relative; padding-bottom: 4px; }
.category-link::after { content: ''; position: absolute; bottom: 0; left: 0; width: 0; height: 2px; transition: width var(--transition-fast); }
.category-link:hover::after { width: 100%; }

/* ---------- Why SSIT ---------- */
.why-ssit { background-color: var(--bg-page); padding: var(--section-padding) 0; }

.section-header { text-align: center; margin-bottom: 60px; }
.section-title { font-family: var(--font-serif); font-size: clamp(32px,4vw,42px); font-weight: 500; color: var(--text-primary); margin-bottom: 24px; }
.gold-line { width: 0; height: 2px; background: linear-gradient(90deg, transparent, var(--accent-gold), transparent); margin: 0 auto; animation: expandLine 1s ease forwards; animation-delay: 0.3s; }
.visible .gold-line { width: 120px; }
@keyframes expandLine { from { width: 0; } to { width: 120px; } }

.features-grid { display: grid; grid-template-columns: repeat(3,1fr); gap: 40px; }

.feature-card { position: relative; overflow: hidden; min-height: 380px; display: flex; flex-direction: column; justify-content: flex-end; text-align: center; padding: 40px 32px; border-radius: 0; }

.feature-card::before { content: ''; position: absolute; inset: 0; background-size: cover; background-position: center; transition: transform 0.6s ease; z-index: 0; }
.feature-card:hover::before { transform: scale(1.05); }

.feature-card::after { content: ''; position: absolute; inset: 0; background: linear-gradient(to top, rgba(255,255,255,0.85) 0%, rgba(255,255,255,0.4) 50%, rgba(255,255,255,0.15) 100%); z-index: 1; transition: background 0.3s ease; }
.feature-card:hover::after { background: linear-gradient(to top, rgba(255,255,255,0.9) 0%, rgba(255,255,255,0.5) 50%, rgba(255,255,255,0.2) 100%); }

.feature-card:nth-child(1)::before { background-image: url('../img/why-heritage.jpg'); }
.feature-card:nth-child(2)::before { background-image: url('../img/why-bridge.jpg'); }
.feature-card:nth-child(3)::before { background-image: url('../img/why-compliance.jpg'); }

.feature-card > * { position: relative; z-index: 2; }

.feature-icon { width: 48px; height: 48px; margin: 0 auto 20px; color: var(--accent-wine); }
.feature-icon svg { width: 100%; height: 100%; }

.feature-title { font-family: var(--font-serif); font-size: 22px; font-weight: 600; color: var(--text-primary); margin-bottom: 12px; }

.feature-desc { font-size: 15px; color: #555; line-height: 1.8; max-height: 0; opacity: 0; overflow: hidden; transition: max-height 1.2s ease, opacity 0.8s ease; }
.feature-card:hover .feature-desc { max-height: 200px; opacity: 1; }
.feature-card:hover .feature-title { transform: translateY(-4px); transition: transform 0.8s ease; }

/* ---------- Footer ---------- */
.footer { background-color: var(--text-primary); color: white; }
.footer-main { padding: 80px 0 60px; background: #FAFAF8; border-top: 1px solid #eee; }
.footer-grid { display: grid; grid-template-columns: 1.5fr 1fr 1fr; gap: 60px; }

.footer-brand { padding-right: 40px; }
.footer-logo { display: flex; align-items: center; gap: 12px; margin-bottom: 20px; }
.footer-logo-img { height: 36px; filter: none; }
.brand-tagline { font-size: 16px; font-weight: 500; margin-bottom: 8px; color: #2c2c2c; }
.brand-desc { font-size: 14px; color: #888; }

.footer-heading { font-size: 14px; font-weight: 600; text-transform: uppercase; letter-spacing: 1px; margin-bottom: 24px; color: #D72F3D; }
.footer-links ul { display: flex; flex-direction: column; gap: 12px; }
.footer-links a { font-size: 14px; color: #555; transition: color var(--transition-fast); }
.footer-links a:hover { color: #D72F3D; }

.footer-contact ul { display: flex; flex-direction: column; gap: 12px; }
.footer-contact a { font-size: 14px; color: #555; transition: color var(--transition-fast); }
.footer-contact a:hover { color: #D72F3D; }
.footer-contact .highlighted { font-size: 13px; font-weight: 600; color: var(--accent-gold); letter-spacing: 0.5px; }

.footer-bottom { background: linear-gradient(135deg, #D72F3D, #A00F18); padding: 20px 0; text-align: center; }
.footer-bottom p { font-size: 13px; color: rgba(255,255,255,0.9); }

/* ---------- Responsive ---------- */
@media (max-width: 1024px) {
    .category-grid { display: grid; grid-template-columns: repeat(2,1fr); }
    .features-grid { grid-template-columns: repeat(2,1fr); gap: 30px; }
    .footer-grid { grid-template-columns: 1fr 1fr; gap: 40px; }
    .footer-brand { grid-column: 1 / -1; padding-right: 0; text-align: center; }
    .footer-logo { justify-content: center; }
}

@media (max-width: 768px) {
    .feature-desc { max-height: 200px !important; opacity: 1 !important; }
    .fade-in-up { transition: opacity 0.5s ease, transform 0.5s ease; }
    .category-card.fade-in-up { transition: opacity 0.5s ease, transform 0.5s ease; }
    .feature-card::after { background: linear-gradient(to top, rgba(255,255,255,0.9) 0%, rgba(255,255,255,0.5) 50%, rgba(255,255,255,0.2) 100%); }
    :root { --section-padding: 70px; }
    .nav-links { display: none; position: absolute; top: 100%; left: 0; right: 0; background-color: var(--bg-card); flex-direction: column; padding: 24px; gap: 20px; box-shadow: 0 10px 30px rgba(0,0,0,0.1); }
    .nav-links.active { display: flex; }
    .nav-links.active a { color: var(--text-primary) !important; }
    .nav-links.active a::after { background: linear-gradient(135deg, #D72F3D, #A00F18) !important; }
    .navbar.transparent .hamburger-line { background-color: white !important; }
    .navbar.transparent .mobile-menu-btn.active .hamburger-line { background-color: var(--text-primary) !important; }
    .nav-links a { color: var(--text-primary); }
    .nav-cta { display: none; }
    .mobile-menu-btn { display: flex; }
    .mobile-menu-btn.active .hamburger-line:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
    .mobile-menu-btn.active .hamburger-line:nth-child(2) { opacity: 0; }
    .mobile-menu-btn.active .hamburger-line:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }
    .hero-content { padding: 0 20px; }
    .category-grid { display: grid; grid-template-columns: 1fr; }
    .category-card { border-bottom: 1px solid var(--border-light); }
    .category-card:last-child { border-bottom: none; }
    .features-grid { grid-template-columns: 1fr; gap: 24px; }
    .footer-grid { grid-template-columns: 1fr; gap: 40px; text-align: center; }
    .footer-brand { padding-right: 0; }
    .footer-logo { justify-content: center; }
}

@media (max-width: 480px) {
    :root { --section-padding: 50px; }
    .hero-title { font-size: 32px; }
    .category-card { padding: 32px 24px; min-height: 300px; }
    .feature-card { padding: 32px 24px; min-height: 300px; }
}

/* Footer address details */
.footer-contact .contact-heading { font-size: 0.85rem; font-weight: 600; color: #2c2c2c; letter-spacing: 0.04em; margin-top: 10px; }
.footer-contact .contact-heading:first-of-type { margin-top: 0; }
.footer-contact .contact-detail { font-size: 0.78rem; color: #777; letter-spacing: 0.02em; line-height: 1.5; }

/* Hero breathe: start only after image ready */
.hero.breathe-ready::before { animation-play-state: running; }
.hero.breathe-ready.scrolling::before { animation-play-state: paused; }

/* RFQ Toast Notification */
.rfq-toast{position:fixed;top:50%;left:50%;transform:translate(-50%,-50%);background:#fff;border-radius:8px;padding:32px 40px;box-shadow:0 12px 40px rgba(0,0,0,0.25);z-index:10001;text-align:center;animation:toastIn 0.3s ease;max-width:380px;width:90%}
.rfq-toast h4{font-family:var(--font-serif);font-size:1.1rem;color:#2C2C2C;margin:0 0 12px 0}
.rfq-toast p{font-size:0.88rem;color:#666;margin:0 0 20px 0;line-height:1.6}
.rfq-toast-btn{display:inline-block;padding:10px 32px;background:linear-gradient(135deg,#D72F3D,#A00F18);color:#fff;border:none;border-radius:4px;font-size:0.88rem;font-weight:600;cursor:pointer;letter-spacing:0.04em}
.rfq-toast-btn:hover{opacity:0.9}
@keyframes toastIn{from{opacity:0;transform:translate(-50%,-50%) scale(0.95)}to{opacity:1;transform:translate(-50%,-50%) scale(1)}}

/* Fix category card flex sizing */
.category-card-link { flex: 1; min-width: 0; }