/* ===========================
   TOLISE FINE CHEMICALS
   Shared CSS — All Pages
   =========================== */

/* --- CSS Variables --- */
:root {
  --navy:       #0A1628;
  --navy-mid:   #0F2040;
  --navy-light: #1A3058;
  --ice:        #F0F4FF;
  --white:      #FFFFFF;
  --gold:       #C9A96E;
  --gold-light: #E2C992;
  --teal:       #00D4AA;
  --teal-dark:  #00A882;
  --gray-100:   #F5F7FA;
  --gray-200:   #E8ECF4;
  --gray-400:   #9AA3B5;
  --gray-600:   #5A6478;
  --gray-800:   #2D3548;
  --text:       #1C2333;
  --text-light: #5A6478;

  --font-display: 'Playfair Display', Georgia, serif;
  --font-body:    'Inter', -apple-system, sans-serif;
  --font-mono:    'Space Mono', 'Courier New', monospace;

  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  16px;
  --radius-xl:  24px;
  --radius-pill:9999px;

  --shadow-sm:  0 1px 3px rgba(10,22,40,0.08);
  --shadow-md:  0 4px 16px rgba(10,22,40,0.12);
  --shadow-lg:  0 12px 40px rgba(10,22,40,0.18);
  --shadow-xl:  0 24px 64px rgba(10,22,40,0.24);

  --transition: 0.25s cubic-bezier(0.4,0,0.2,1);
  --transition-slow: 0.45s cubic-bezier(0.4,0,0.2,1);

  --container:  1200px;
  --gap:        1.5rem;
}

/* --- Reset --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-body);
  color: var(--text);
  background: var(--white);
  line-height: 1.6;
  overflow-x: hidden;
}
img { max-width: 100%; height: auto; display: block; }
a { color: inherit; text-decoration: none; }
ul { list-style: none; }
button { cursor: pointer; border: none; background: none; font: inherit; }

/* --- Container --- */
.container {
  width: 100%;
  max-width: var(--container);
  margin: 0 auto;
  padding: 0 1.5rem;
}

/* --- Typography --- */
h1, h2, h3, h4 { font-family: var(--font-display); line-height: 1.2; }
h1 { font-size: clamp(2.2rem, 5vw, 3.8rem); font-weight: 700; }
h2 { font-size: clamp(1.7rem, 3.5vw, 2.8rem); font-weight: 600; }
h3 { font-size: clamp(1.1rem, 2vw, 1.4rem); font-weight: 600; }
p  { font-size: 1rem; line-height: 1.75; color: var(--text-light); }

.gradient-text {
  background: linear-gradient(135deg, var(--gold) 0%, var(--teal) 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* --- Section Spacing --- */
.section { padding: 6rem 0; }
.section--dark { background: var(--navy); color: var(--white); }
.section--dark h2, .section--dark h3 { color: var(--white); }
.section--dark p { color: rgba(255,255,255,0.7); }
.section--gray { background: var(--gray-100); }

.section-header { text-align: center; max-width: 680px; margin: 0 auto 3.5rem; }
.section-header--left { text-align: left; margin-left: 0; }
.section-header--light .section-eyebrow { color: var(--teal); }
.section-header--light h2 { color: var(--white); }

.section-eyebrow {
  font-family: var(--font-mono);
  font-size: 0.75rem;
  letter-spacing: 0.15em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 0.75rem;
}

.section-sub {
  margin-top: 1rem;
  font-size: 1.05rem;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 600;
  letter-spacing: 0.03em;
  border-radius: var(--radius-sm);
  padding: 0.65rem 1.4rem;
  transition: all var(--transition);
  text-decoration: none;
  cursor: pointer;
  white-space: nowrap;
}
.btn-lg { padding: 0.85rem 1.8rem; font-size: 0.95rem; }
.btn-sm { padding: 0.45rem 1rem; font-size: 0.82rem; }

.btn-primary {
  background: var(--teal);
  color: var(--navy);
  border: 2px solid var(--teal);
}
.btn-primary:hover {
  background: var(--teal-dark);
  border-color: var(--teal-dark);
  transform: translateY(-1px);
  box-shadow: 0 6px 20px rgba(0,212,170,0.3);
}

.btn-outline {
  background: transparent;
  color: var(--navy);
  border: 2px solid var(--navy);
}
.btn-outline:hover {
  background: var(--navy);
  color: var(--white);
  transform: translateY(-1px);
}

.btn-ghost {
  background: transparent;
  color: var(--white);
  border: 2px solid rgba(255,255,255,0.4);
}
.btn-ghost:hover {
  background: rgba(255,255,255,0.1);
  border-color: rgba(255,255,255,0.7);
}

/* --- Header --- */
.site-header {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 1000;
  transition: all var(--transition);
  padding: 0;
}
.site-header.scrolled {
  background: rgba(10,22,40,0.97);
  backdrop-filter: blur(12px);
  box-shadow: 0 2px 24px rgba(0,0,0,0.3);
}
.header-inner {
  display: flex;
  align-items: center;
  gap: 2rem;
  height: 72px;
}

.logo {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  flex-shrink: 0;
  text-decoration: none;
}
.logo-mark {
  font-size: 1.4rem;
  color: var(--teal);
  line-height: 1;
}
.logo-text {
  font-family: var(--font-mono);
  font-size: 1rem;
  font-weight: 700;
  color: var(--white);
  letter-spacing: 0.05em;
}
.logo-text em {
  font-style: normal;
  color: var(--gold);
}

.main-nav { margin-left: auto; }
.main-nav ul { display: flex; gap: 0.25rem; align-items: center; }
.main-nav a {
  font-size: 0.88rem;
  font-weight: 500;
  color: rgba(255,255,255,0.8);
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition);
}
.main-nav a:hover,
.main-nav a.active { color: var(--teal); }

.header-cta { margin-left: 0.5rem; }

.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 0.5rem;
  margin-left: auto;
}
.hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--white);
  border-radius: 2px;
  transition: all var(--transition);
}
.hamburger.open span:nth-child(1) { transform: translateY(7px) rotate(45deg); }
.hamburger.open span:nth-child(2) { opacity: 0; }
.hamburger.open span:nth-child(3) { transform: translateY(-7px) rotate(-45deg); }

/* --- Mobile Nav --- */
.mobile-nav {
  position: fixed;
  top: 72px;
  left: 0; right: 0;
  background: var(--navy-mid);
  padding: 1.5rem;
  z-index: 999;
  transform: translateY(-110%);
  opacity: 0;
  transition: all var(--transition-slow);
  pointer-events: none;
}
.mobile-nav.open {
  transform: translateY(0);
  opacity: 1;
  pointer-events: all;
}
.mobile-nav ul { display: flex; flex-direction: column; gap: 0.5rem; }
.mobile-nav a {
  display: block;
  padding: 0.75rem 1rem;
  color: rgba(255,255,255,0.85);
  font-weight: 500;
  border-radius: var(--radius-sm);
  transition: background var(--transition);
}
.mobile-nav a:hover { background: rgba(255,255,255,0.08); color: var(--teal); }
.mobile-nav .btn { margin-top: 0.5rem; width: 100%; justify-content: center; }

/* --- Footer --- */
.site-footer {
  background: var(--navy);
  color: rgba(255,255,255,0.75);
  padding: 5rem 0 2rem;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1.5fr;
  gap: 3rem;
  padding-bottom: 3rem;
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .logo { margin-bottom: 1rem; }
.footer-brand p { font-size: 0.88rem; line-height: 1.7; max-width: 280px; }
.footer-nav h4, .footer-contact h4 {
  font-family: var(--font-mono);
  font-size: 0.72rem;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1.2rem;
}
.footer-nav ul, .footer-contact ul { display: flex; flex-direction: column; gap: 0.6rem; }
.footer-nav a { font-size: 0.88rem; transition: color var(--transition); }
.footer-nav a:hover { color: var(--teal); }
.footer-contact ul li {
  display: flex;
  align-items: flex-start;
  gap: 0.6rem;
  font-size: 0.88rem;
}
.footer-contact svg { width: 14px; height: 14px; flex-shrink: 0; margin-top: 3px; color: var(--teal); }

.social-links { display: flex; gap: 0.75rem; margin-top: 1.5rem; }
.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border: 1px solid rgba(255,255,255,0.15);
  border-radius: var(--radius-sm);
  color: rgba(255,255,255,0.6);
  transition: all var(--transition);
}
.social-links a:hover { border-color: var(--teal); color: var(--teal); }
.social-links svg { width: 16px; height: 16px; }

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 2rem;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.45);
}
.footer-bottom strong { color: rgba(255,255,255,0.6); }
.footer-legal { display: flex; gap: 1.5rem; }
.footer-legal a { transition: color var(--transition); }
.footer-legal a:hover { color: var(--teal); }

/* --- Page Hero (inner pages) --- */
.page-hero {
  background: var(--navy);
  padding: 9rem 0 5rem;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse at 60% 50%, rgba(0,212,170,0.06) 0%, transparent 70%);
}
.page-hero-content { position: relative; z-index: 1; }
.page-hero h1 { color: var(--white); }
.page-hero p { color: rgba(255,255,255,0.7); margin-top: 1rem; max-width: 560px; font-size: 1.05rem; }

/* --- Utility --- */
.text-center { text-align: center; }
.mt-lg { margin-top: 3rem; }
.mt-md { margin-top: 2rem; }
.mt-sm { margin-top: 1rem; }
.mb-lg { margin-bottom: 3rem; }
.visually-hidden { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }

/* --- Reveal Animations --- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.65s ease, transform 0.65s ease;
}
.reveal.visible {
  opacity: 1;
  transform: none;
}

/* ========================
   RESPONSIVE
   ======================== */
@media (max-width: 1024px) {
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 2rem; }
}

@media (max-width: 768px) {
  :root { --gap: 1rem; }
  .section { padding: 4rem 0; }
  .main-nav { display: none; }
  .header-cta { display: none; }
  .hamburger { display: flex; }
  .footer-grid { grid-template-columns: 1fr; gap: 2rem; }
  .footer-bottom { flex-direction: column; text-align: center; }
}