/* =================================================================
   ROVAKS KİMYA — Tasarım Sistemi (İterasyon 04)
   Hero = kimlik · belirgin molekül + formül filigranı · premium CTA
   ================================================================= */

:root {
    --ink:        #0A0F1E;
    --ink-soft:   #44506A;
    --ink-faint:  #7C879C;
    --paper:      #FFFFFF;
    --surface:    #FFFFFF;
    --line:       #E2E7F2;
    --accent:     #2456E6;
    --accent-deep:#173FB0;
    --accent-wash:#EAF0FE;
    --signal:     #38BDF8;

    --font-display: 'Archivo', system-ui, sans-serif;
    --font-body:    'IBM Plex Sans', system-ui, sans-serif;
    --font-mono:    'IBM Plex Mono', ui-monospace, monospace;

    --maxw: 1400px;
    --radius: 22px;
    --radius-sm: 16px;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0; font-family: var(--font-body); background: var(--paper); color: var(--ink);
    -webkit-font-smoothing: antialiased; text-rendering: optimizeLegibility; overflow-x: hidden;
}
body.menu-open { overflow: hidden; }
::selection { background: var(--accent); color: #fff; }
a { color: inherit; }
h1, h2, h3, h4 { font-family: var(--font-display); font-weight: 800; letter-spacing: -0.02em; line-height: 1.04; color: var(--ink); margin: 0; }
p { line-height: 1.65; }
img { max-width: 100%; }
.container { max-width: var(--maxw); }
section[id] { scroll-margin-top: 110px; }

/* ---------- Katman sırası ---------- */
.hero-formula { z-index: 0; }      /* formül filigranı en arkada */
#webgl-canvas { position: fixed; inset: 0; width: 100vw; height: 100vh; z-index: 1; pointer-events: none; will-change: opacity; }
#labels-container { position: fixed; inset: 0; z-index: 2; pointer-events: none; will-change: opacity; }
.content-wrapper { position: relative; z-index: 3; }

.element-label {
    font-family: var(--font-mono); font-size: 9px; font-weight: 600; letter-spacing: 0.04em;
    color: var(--ink-soft); background: rgba(255,255,255,0.65);
    border: 1px solid rgba(36,86,230,0.20); padding: 1px 4px; border-radius: 4px;
    transform: translate(11px, -11px); backdrop-filter: blur(2px); white-space: nowrap; user-select: none;
}
.element-label.carbon { color: #fff; background: var(--ink); border-color: var(--ink); }

/* ---------- Hero formül filigranı (ürünlerdeki gibi silik mavi) ---------- */
.hero-formula {
    position: fixed; top: 50%; left: 50%;
    transform: translate(-50%, -50%);
    pointer-events: none; opacity: 0; will-change: opacity, transform;
}
.hero-formula .hf {
    position: absolute; top: 50%; left: 50%; transform: translate(-50%, -50%);
    font-family: var(--font-mono); font-weight: 600;
    font-size: clamp(4rem, 17vw, 14rem); line-height: 1;
    color: rgba(36, 86, 230, 0.09); white-space: nowrap; letter-spacing: 0.01em;
}

/* ---------- Header (yüzen / radius) ---------- */
.site-header {
    position: fixed; top: 14px; left: 50%; transform: translateX(-50%);
    width: calc(100% - 28px); max-width: var(--maxw); z-index: 100;
    display: flex; align-items: center; justify-content: space-between; gap: 1rem;
    padding: 0.65rem 0.7rem 0.65rem 1.4rem;
    background: rgba(255,255,255,0.74);
    backdrop-filter: blur(16px) saturate(150%); -webkit-backdrop-filter: blur(16px) saturate(150%);
    border: 1px solid var(--line); border-radius: 18px;
    box-shadow: 0 12px 34px -20px rgba(16,38,90,0.30);
}
.brand { display: flex; align-items: baseline; gap: 0.55rem; font-family: var(--font-display); font-weight: 900; font-size: 1.3rem; letter-spacing: 0.04em; color: var(--ink); text-decoration: none; }
.brand .brand-tag { font-family: var(--font-mono); font-size: 0.58rem; font-weight: 500; letter-spacing: 0.16em; color: var(--accent); border: 1px solid var(--line); border-radius: 999px; padding: 2px 8px; text-transform: uppercase; }
.main-nav { display: flex; gap: 2rem; }
.main-nav a { font-size: 0.86rem; font-weight: 500; color: var(--ink-soft); text-decoration: none; position: relative; transition: color 0.25s ease; }
.main-nav a::after { content: ""; position: absolute; left: 0; bottom: -6px; width: 0; height: 1.5px; background: var(--accent); transition: width 0.3s ease; }
.main-nav a:hover { color: var(--ink); }
.main-nav a:hover::after { width: 100%; }
.header-right { display: flex; align-items: center; gap: 0.5rem; }
.btn-quote { font-family: var(--font-body); font-weight: 600; font-size: 0.85rem; color: #fff; background: var(--ink); border: 1px solid var(--ink); border-radius: 999px; padding: 0.55rem 1.4rem; text-decoration: none; transition: background 0.25s ease, transform 0.25s ease; white-space: nowrap; display: inline-flex; align-items: center; gap: 0.4rem; }
.btn-quote:hover { background: var(--accent); border-color: var(--accent); transform: translateY(-1px); }
.nav-toggle { display: none; flex-direction: column; gap: 4px; width: 44px; height: 44px; align-items: center; justify-content: center; background: transparent; border: 1px solid var(--line); border-radius: 12px; cursor: pointer; }
.nav-toggle span { width: 18px; height: 2px; background: var(--ink); border-radius: 2px; transition: 0.3s ease; }

/* ---------- Mobil off-canvas menü ---------- */
.mobile-menu-overlay { position: fixed; inset: 0; z-index: 110; background: rgba(10,15,30,0.45); backdrop-filter: blur(2px); opacity: 0; visibility: hidden; transition: opacity 0.4s ease, visibility 0.4s ease; }
body.menu-open .mobile-menu-overlay { opacity: 1; visibility: visible; }
.mobile-menu { position: fixed; top: 0; right: 0; z-index: 120; width: min(84vw, 360px); height: 100vh; height: 100dvh; background: #fff; padding: 5.5rem 2rem 2.2rem; display: flex; flex-direction: column; box-shadow: -24px 0 60px -24px rgba(16,38,90,0.4); transform: translateX(105%); transition: transform 0.55s cubic-bezier(0.16, 1, 0.3, 1); }
body.menu-open .mobile-menu { transform: translateX(0); }
.mobile-close { position: absolute; top: 1.4rem; right: 1.4rem; width: 42px; height: 42px; border-radius: 12px; border: 1px solid var(--line); background: #fff; color: var(--ink); font-size: 1.1rem; cursor: pointer; display: grid; place-items: center; }
.mobile-nav { display: flex; flex-direction: column; gap: 0.4rem; }
.mobile-nav a { font-family: var(--font-display); font-weight: 700; font-size: 1.7rem; color: var(--ink); text-decoration: none; padding: 0.5rem 0; border-bottom: 1px solid var(--line); opacity: 0; transform: translateX(24px); transition: opacity 0.45s ease, transform 0.45s ease, color 0.2s ease; }
.mobile-nav a:hover { color: var(--accent); }
body.menu-open .mobile-nav a { opacity: 1; transform: translateX(0); }
body.menu-open .mobile-nav a:nth-child(1) { transition-delay: 0.14s; }
body.menu-open .mobile-nav a:nth-child(2) { transition-delay: 0.20s; }
body.menu-open .mobile-nav a:nth-child(3) { transition-delay: 0.26s; }
body.menu-open .mobile-nav a:nth-child(4) { transition-delay: 0.32s; }
.mobile-cta { margin-top: auto; opacity: 0; transform: translateY(16px); transition: opacity 0.5s ease 0.4s, transform 0.5s ease 0.4s; justify-content: center; }
body.menu-open .mobile-cta { opacity: 1; transform: translateY(0); }

/* ---------- Bölüm ritmi ---------- */
.panel { position: relative; padding-block: clamp(5rem, 11vh, 8.5rem); }
.panel-tall { min-height: 100vh; display: flex; align-items: center; }
.formula-tag { display: inline-flex; align-items: center; gap: 0.5rem; font-family: var(--font-mono); font-size: 0.72rem; font-weight: 500; letter-spacing: 0.16em; text-transform: uppercase; color: var(--accent); }
.formula-tag::before { content: ""; width: 18px; height: 1px; background: var(--accent); }
.formula-tag.on-dark { color: var(--signal); }
.formula-tag.on-dark::before { background: var(--signal); }
.section-head { max-width: 640px; margin-bottom: 3rem; }
.section-head h2 { font-size: clamp(2rem, 4vw, 2.9rem); margin: 0.9rem 0 1rem; }
.section-head p { color: var(--ink-soft); font-size: 1.02rem; margin: 0; }

/* ---------- Cam kart ---------- */
.glass-card { position: relative; background: rgba(255,255,255,0.62); backdrop-filter: blur(20px) saturate(125%); -webkit-backdrop-filter: blur(20px) saturate(125%); border: 1px solid rgba(255,255,255,0.8); border-radius: var(--radius); padding: clamp(1.85rem, 3vw, 2.85rem); box-shadow: inset 0 1px 0 rgba(255,255,255,0.9), 0 30px 60px -34px rgba(16,38,90,0.30), 0 10px 24px -18px rgba(16,38,90,0.18); overflow: hidden; }
.glass-card h1, .glass-card h2 { font-size: clamp(1.9rem, 3.5vw, 2.6rem); margin-bottom: 1.25rem; }
.glass-card p { color: var(--ink-soft); font-size: 0.97rem; margin-bottom: 1rem; }
.glass-card p:last-child { margin-bottom: 0; }
.glass-card strong { color: var(--ink); font-weight: 600; }
.glass-card .lead-out { color: var(--ink); font-weight: 500; font-style: italic; }
.reflection-glow { position: absolute; top: -40%; left: -20%; width: 70%; height: 70%; background: radial-gradient(circle, rgba(36,86,230,0.16), transparent 70%); filter: blur(20px); pointer-events: none; }

/* ---------- Hero ---------- */
.hero { min-height: 100vh; display: flex; align-items: center; }
.hero-eyebrow { margin-bottom: 1.6rem; }
.hero h1 { font-size: clamp(2.6rem, 6.2vw, 4.8rem); font-weight: 900; letter-spacing: -0.035em; line-height: 1.0; max-width: 15ch; }
.hero h1 .accent { color: var(--accent); }
.hero-sub { margin: 1.8rem 0 2.4rem; max-width: 50ch; font-size: 1.06rem; color: var(--ink-soft); }
.hero-actions { display: flex; flex-wrap: wrap; gap: 0.9rem; align-items: center; }
.btn-primary-x, .btn-ghost-x { font-family: var(--font-body); font-weight: 600; font-size: 0.95rem; border-radius: 999px; padding: 0.85rem 1.8rem; text-decoration: none; display: inline-flex; align-items: center; gap: 0.5rem; transition: all 0.25s ease; }
.btn-primary-x { background: var(--accent); color: #fff; border: 1px solid var(--accent); }
.btn-primary-x:hover { background: var(--accent-deep); border-color: var(--accent-deep); transform: translateY(-2px); box-shadow: 0 14px 30px -14px rgba(36,86,230,0.6); }
.btn-ghost-x { background: transparent; color: var(--ink); border: 1px solid var(--line); }
.btn-ghost-x:hover { border-color: var(--ink); }
.hero-meta { display: flex; flex-wrap: wrap; gap: 2.4rem; margin-top: 3.2rem; padding-top: 1.6rem; border-top: 1px solid var(--line); }
.hero-meta .k { font-family: var(--font-display); font-weight: 800; font-size: 1.5rem; color: var(--ink); }
.hero-meta .v { font-family: var(--font-mono); font-size: 0.72rem; letter-spacing: 0.08em; text-transform: uppercase; color: var(--ink-faint); margin-top: 0.2rem; }
.hero-scrim { position: absolute; inset: 0; z-index: -1; background: radial-gradient(120% 80% at 0% 50%, #fff 34%, rgba(255,255,255,0.5) 55%, transparent 74%); pointer-events: none; }

/* ---------- Hizmetler ---------- */
.svc-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1.1rem; }
.svc-card { position: relative; background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-sm); padding: 1.9rem 1.7rem; transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease; overflow: hidden; }
.svc-card::before { content: ""; position: absolute; left: 0; top: 0; bottom: 0; width: 3px; background: var(--accent); transform: scaleY(0); transform-origin: bottom; transition: transform 0.35s ease; }
.svc-card:hover { transform: translateY(-5px); border-color: transparent; box-shadow: 0 26px 50px -30px rgba(16,38,90,0.4); }
.svc-card:hover::before { transform: scaleY(1); }
.svc-icon { width: 3rem; height: 3rem; border-radius: 12px; display: grid; place-items: center; background: var(--accent-wash); color: var(--accent); font-size: 1.4rem; margin-bottom: 1.3rem; }
.svc-card h3 { font-size: 1.18rem; margin-bottom: 0.55rem; }
.svc-card p { font-size: 0.9rem; color: var(--ink-soft); margin: 0; }

/* ---------- Ürün Kataloğu ---------- */
.prod-category { margin-bottom: 3.4rem; }
.prod-category:last-child { margin-bottom: 0; }
.cat-head { display: flex; align-items: baseline; gap: 0.9rem; margin-bottom: 1.4rem; padding-bottom: 0.8rem; border-bottom: 1px solid var(--line); }
.cat-head .cat-index { font-family: var(--font-mono); font-size: 0.8rem; font-weight: 600; color: var(--accent); letter-spacing: 0.06em; }
.cat-head h3 { font-size: clamp(1.15rem, 2.4vw, 1.65rem); }
.chem-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(158px, 1fr)); gap: 0.9rem; }
.chem-item { position: relative; border: 1px solid var(--line); border-radius: 14px; background: linear-gradient(180deg, #fff, #FBFCFF); overflow: hidden; aspect-ratio: 1 / 0.82; display: flex; flex-direction: column; transition: transform 0.3s ease, border-color 0.3s ease, box-shadow 0.3s ease; }
.chem-item:hover { transform: translateY(-4px); border-color: var(--accent); box-shadow: 0 22px 44px -26px rgba(36,86,230,0.5); }
.chem-watermark { position: absolute; inset: 0; display: grid; place-items: center; font-family: var(--font-mono); font-weight: 600; font-size: clamp(1.2rem, 2.4vw, 1.9rem); color: rgba(36,86,230,0.07); letter-spacing: 0.01em; white-space: nowrap; pointer-events: none; z-index: 0; padding: 0 0.4rem; }
.chem-canvas { position: absolute; inset: 0; width: 100%; height: 100%; z-index: 1; }
.chem-name { position: relative; z-index: 2; margin-top: auto; padding: 1.4rem 0.85rem 0.8rem; font-size: 0.82rem; font-weight: 600; line-height: 1.25; color: var(--ink); background: linear-gradient(180deg, transparent, #fff 62%); }
.chem-item:hover .chem-watermark { color: rgba(36,86,230,0.12); }

/* ---------- CTA / İletişim (premium) ---------- */
.contact-panel { background: #fff; border-top: 1px solid var(--line); }
.cta-block {
    position: relative; border-radius: 28px; overflow: hidden; color: #fff;
    padding: clamp(2.2rem, 4.5vw, 4rem);
    background: radial-gradient(135% 150% at 100% 0%, #2456E6 0%, #16307E 42%, #0A0F1E 100%);
    box-shadow: 0 50px 90px -50px rgba(16,38,90,0.7);
}
.cta-block::before {
    content: ""; position: absolute; inset: 0;
    background-image: radial-gradient(rgba(255,255,255,0.14) 1px, transparent 1.4px);
    background-size: 24px 24px; opacity: 0.55;
    -webkit-mask: radial-gradient(120% 90% at 85% 8%, #000, transparent 68%);
            mask: radial-gradient(120% 90% at 85% 8%, #000, transparent 68%);
    pointer-events: none;
}
.cta-glow { position: absolute; width: 460px; height: 460px; right: -130px; top: -180px; background: radial-gradient(circle, rgba(56,189,248,0.5), transparent 64%); filter: blur(34px); pointer-events: none; }
.cta-content { position: relative; z-index: 1; display: grid; grid-template-columns: 1.05fr 0.95fr; gap: clamp(2rem, 4vw, 4rem); align-items: center; }
.cta-left h2 { color: #fff; font-size: clamp(1.9rem, 3.6vw, 2.9rem); line-height: 1.02; margin: 0.85rem 0 1rem; }
.cta-left p { color: rgba(255,255,255,0.72); margin: 0 0 1.9rem; max-width: 42ch; }
.cta-actions { display: flex; flex-wrap: wrap; gap: 0.8rem; }
.btn-cta-primary, .btn-cta-ghost { font-family: var(--font-body); font-weight: 700; font-size: 0.95rem; border-radius: 999px; padding: 0.9rem 1.8rem; text-decoration: none; display: inline-flex; align-items: center; gap: 0.5rem; transition: all 0.25s ease; }
.btn-cta-primary { background: #fff; color: var(--ink); border: 1px solid #fff; }
.btn-cta-primary:hover { transform: translateY(-2px); box-shadow: 0 18px 34px -16px rgba(0,0,0,0.55); }
.btn-cta-ghost { background: rgba(255,255,255,0.08); color: #fff; border: 1px solid rgba(255,255,255,0.28); }
.btn-cta-ghost:hover { background: rgba(255,255,255,0.18); transform: translateY(-2px); }
.cta-channels { display: flex; flex-direction: column; gap: 0.7rem; }
.channel { display: flex; align-items: center; gap: 1rem; padding: 1rem 1.2rem; border: 1px solid rgba(255,255,255,0.14); border-radius: 16px; background: rgba(255,255,255,0.05); -webkit-backdrop-filter: blur(6px); backdrop-filter: blur(6px); text-decoration: none; color: #fff; transition: all 0.25s ease; }
.channel:hover { background: rgba(255,255,255,0.12); transform: translateX(5px); border-color: rgba(255,255,255,0.32); }
.channel .ch-ic { width: 2.7rem; height: 2.7rem; border-radius: 50%; display: grid; place-items: center; background: rgba(56,189,248,0.18); color: #9fd4ff; font-size: 1.2rem; flex: none; }
.channel .ch-meta { display: flex; flex-direction: column; line-height: 1.3; }
.channel .ch-label { font-size: 0.72rem; letter-spacing: 0.04em; text-transform: uppercase; color: rgba(255,255,255,0.55); }
.channel .ch-value { font-weight: 600; font-size: 0.98rem; }
.channel .ch-arrow { margin-left: auto; color: rgba(255,255,255,0.5); font-size: 1.4rem; transition: transform 0.25s ease; }
.channel:hover .ch-arrow { transform: translateX(4px); color: #fff; }
.cta-map { margin-top: 1.3rem; border-radius: var(--radius); overflow: hidden; border: 1px solid var(--line); box-shadow: 0 24px 50px -34px rgba(16,38,90,0.4); }
.cta-map iframe { display: block; width: 100%; height: 320px; border: 0; filter: grayscale(0.2) contrast(1.02); }

/* ---------- Footer ---------- */
.site-footer { position: relative; z-index: 3; background: var(--ink); color: #fff; padding: 3.5rem 0 3rem; }
.site-footer .brand { color: #fff; }
.site-footer .brand .brand-tag { color: var(--signal); border-color: rgba(255,255,255,0.25); }
.site-footer .foot-row { display: flex; flex-wrap: wrap; gap: 1rem; justify-content: space-between; align-items: center; }
.site-footer p { color: rgba(255,255,255,0.6); font-size: 0.86rem; margin: 0; }
.site-footer .foot-mono { font-family: var(--font-mono); font-size: 0.74rem; letter-spacing: 0.1em; color: rgba(255,255,255,0.4); text-transform: uppercase; }

/* ---------- Yardımcılar ---------- */
.text-mono { font-family: var(--font-mono); }
.fw-black { font-weight: 900; }
a:focus-visible, button:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 6px; }

/* ---------- Responsive ---------- */
@media (max-width: 991px) { .svc-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 849px) { .cta-content { grid-template-columns: 1fr; gap: 2.2rem; } }
@media (max-width: 767px) {
    .svc-grid { grid-template-columns: 1fr; }
    .chem-grid { grid-template-columns: repeat(auto-fill, minmax(140px, 1fr)); gap: 0.7rem; }
    .hero h1 { max-width: 100%; }
    .nav-toggle { display: flex; }
    #webgl-canvas, #labels-container { opacity: 0.5; }
    .hero-meta { gap: 1.6rem; }
    .site-header { padding-left: 1.1rem; }
}
@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    *, .mobile-menu, .mobile-nav a { transition-duration: 0.001ms !important; animation-duration: 0.001ms !important; }
}