/* Korvanto — Base: variables, layout, buttons, reveal */
/* Korvanto - Premium 3D B2B Industrial Mineral Export */
@import url('credentials-strip.css?v=2');
@import url('floating-contact.css?v=2');

:root {
  --navy: #09233D;
  --navy-secondary: #123B5D;
  --gold: #C59A4A;
  --white: #FFFFFF;
  --grey-light: #F5F6F7;
  --text-dark: #17212B;
  --text-soft: #66727F;
  --border: #E5E8EB;
  --font-heading: 'Montserrat', sans-serif;
  --font-body: 'Inter', sans-serif;
  --container: min(1360px, 92vw);
  --site-max: 1360px;
  --site-gutter: max(4vw, calc((100% - min(var(--site-max), 92vw)) / 2));
  --section-pad: clamp(56px, 8vw, 110px);
  --radius: 12px;
  --radius-lg: 18px;
  --shadow-soft: 0 20px 50px rgba(9, 35, 61, 0.12);
  --shadow-card: 0 12px 40px rgba(9, 35, 61, 0.1);
  --transition: 0.45s cubic-bezier(0.4, 0, 0.2, 1);
  --site-header-clearance: max(7rem, calc(2.5rem + clamp(72px, 9vw, 92px)));
}

*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
  scroll-behavior: smooth;
  -webkit-font-smoothing: antialiased;
}

body {
  font-family: var(--font-body);
  font-size: 16px;
  line-height: 1.65;
  color: var(--text-dark);
  background: var(--white);
  overflow-x: hidden;
}

body.nav-open { overflow: hidden; }

img {
  max-width: 100%;
  height: auto;
  display: block;
  object-fit: cover;
}

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--transition), opacity var(--transition);
}

ul { list-style: none; }

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-heading);
  font-weight: 600;
  line-height: 1.2;
  color: var(--text-dark);
}

.container {
  width: min(var(--site-max), calc(100% - 2 * var(--site-gutter)));
  margin-left: auto;
  margin-right: auto;
}

.section {
  padding-top: var(--section-pad);
  padding-bottom: var(--section-pad);
}

.section-label {
  font-family: var(--font-heading);
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.14em;
  text-transform: uppercase;
  color: var(--gold);
  margin-bottom: 1rem;
}

.section-title {
  font-size: clamp(1.75rem, 3.2vw, 2.5rem);
  margin-bottom: 1.25rem;
  max-width: 28ch;
}

.section-lead {
  color: var(--text-soft);
  font-size: 1.05rem;
  max-width: 52ch;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-heading);
  font-size: 0.875rem;
  font-weight: 600;
  letter-spacing: 0.04em;
  padding: 0.9rem 1.75rem;
  border-radius: 6px;
  border: 2px solid transparent;
  cursor: pointer;
  transition: background var(--transition), color var(--transition), border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

a.btn {
  text-decoration: none;
}

.btn .arrow {
  display: inline-block;
  transition: transform var(--transition);
}

.btn-icon {
  display: inline-flex;
  flex-shrink: 0;
  align-items: center;
  justify-content: center;
}

.btn-icon svg {
  width: 1.1rem;
  height: 1.1rem;
}

.btn:hover .arrow { transform: translateX(4px); }

.btn-gold {
  background: var(--gold);
  color: var(--navy);
  border-color: var(--gold);
}

.btn-gold:hover {
  background: var(--white);
  color: var(--navy);
  box-shadow: 0 8px 24px rgba(197, 154, 74, 0.35);
}

.btn-outline {
  background: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.5);
}

.btn-outline:hover {
  border-color: var(--white);
  background: rgba(255, 255, 255, 0.08);
}

.btn-navy {
  background: var(--navy);
  color: var(--white);
  border-color: var(--navy);
}

.btn-navy:hover {
  background: var(--navy-secondary);
  border-color: var(--navy-secondary);
}

.btn-sm { padding: 0.65rem 1.25rem; font-size: 0.8rem; }

/* Reveal */
.reveal {
  opacity: 0;
  transform: translateY(28px);
  transition: opacity 0.9s ease, transform 0.9s ease;
}

.reveal.is-visible {
  opacity: 1;
  transform: translateY(0);
}

.reveal-delay-1 { transition-delay: 0.1s; }
.reveal-delay-2 { transition-delay: 0.2s; }
.reveal-delay-3 { transition-delay: 0.3s; }