/* === NEW RIVER ENGINEERS WEBSITE === */
/* Main CSS: Variables, Reset, Typography, Base Styles */

@import url('https://fonts.googleapis.com/css2?family=Playfair+Display:wght@700;900&family=Barlow:wght@300;400;500;600;700&family=Barlow+Condensed:wght@500;600;700&display=swap');

/* ===== CSS VARIABLES ===== */
:root {
  /* Colors */
  --primary:       #1A3A5C;
  --primary-dark:  #0D2239;
  --accent:        #2E8B57;
  --accent-light:  #3DAA6D;
  --gold:          #C9A84C;
  --white:         #FFFFFF;
  --off-white:     #F5F7FA;
  --gray-light:    #E8ECF0;
  --gray-mid:      #8A9BAE;
  --text-dark:     #1C2B3A;
  --text-body:     #3D4F60;

  /* Glass Effects */
  --glass-bg:           rgba(255,255,255,0.06);
  --glass-bg-light:     rgba(255,255,255,0.88);
  --glass-border:       rgba(255,255,255,0.13);
  --glass-border-gold:  rgba(201,168,76,0.38);

  /* Luxury Backgrounds */
  --luxury-900:    #040B14;
  --luxury-800:    #060D18;
  --luxury-700:    #0A1628;
  --luxury-600:    #0D1B2A;

  /* Gold Extras */
  --gold-light:    #E8C97A;
  --gold-glow:     rgba(201,168,76,0.25);

  /* Shadows */
  --shadow-deep:    0 25px 60px rgba(13,34,57,0.35), 0 8px 20px rgba(13,34,57,0.2);
  --shadow-card:    0 8px 32px rgba(26,58,92,0.15), 0 2px 8px rgba(26,58,92,0.08);
  --shadow-sm:      0 2px 8px rgba(26,58,92,0.1);
  --shadow-luxury:  0 32px 80px rgba(4,11,20,0.55), 0 8px 32px rgba(4,11,20,0.3);
  --shadow-gold:    0 8px 32px rgba(201,168,76,0.18), 0 0 0 1px rgba(201,168,76,0.28);

  /* Typography */
  --font-display:  'Playfair Display', serif;
  --font-body:     'Barlow', sans-serif;
  --font-ui:       'Barlow Condensed', sans-serif;

  /* Spacing */
  --spacing-xs:    0.5rem;
  --spacing-sm:    1rem;
  --spacing-md:    1.5rem;
  --spacing-lg:    2rem;
  --spacing-xl:    3rem;
  --spacing-2xl:   4rem;
  --spacing-3xl:   6rem;

  /* Transitions */
  --transition-fast:   0.15s ease;
  --transition-normal: 0.25s ease;
  --transition-slow:   0.35s ease;

  /* Border radius */
  --radius-sm:     8px;
  --radius-md:     12px;
  --radius-lg:     16px;
  --radius-xl:     20px;

  /* Z-index */
  --z-dropdown:    100;
  --z-sticky:      200;
  --z-overlay:     300;
  --z-modal:       400;
}

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

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

body {
  font-family: var(--font-body);
  color: var(--text-body);
  background-color: var(--white);
  line-height: 1.6;
  font-size: 1rem;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-dark);
  line-height: 1.2;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-family: var(--font-display);
  font-size: clamp(2rem, 8vw, 3.5rem);
  font-weight: 900;
}

h2 {
  font-family: var(--font-display);
  font-size: clamp(1.75rem, 5vw, 2.75rem);
  font-weight: 700;
}

h3 {
  font-family: var(--font-ui);
  font-size: clamp(1.25rem, 3.5vw, 1.75rem);
  font-weight: 600;
  letter-spacing: 0.03em;
}

h4, h5, h6 {
  font-family: var(--font-ui);
  font-weight: 600;
  letter-spacing: 0.02em;
}

h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

p {
  margin-bottom: var(--spacing-md);
}

p + p {
  margin-top: -var(--spacing-sm);
}

a {
  color: var(--accent);
  text-decoration: none;
  transition: color var(--transition-normal);
}

a:hover {
  color: var(--accent-light);
}

strong {
  font-weight: 600;
  color: var(--text-dark);
}

/* ===== BASE ELEMENTS ===== */
img {
  display: block;
  max-width: 100%;
  height: auto;
}

button,
input,
textarea,
select {
  font-family: inherit;
  font-size: inherit;
}

/* ===== UTILITY CLASSES ===== */
.container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

@media (max-width: 768px) {
  .container {
    padding: 0 var(--spacing-md);
  }
}

.sr-only {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  border: 0;
}

.text-center { text-align: center; }
.text-left   { text-align: left; }
.text-right  { text-align: right; }

.mt-sm { margin-top: var(--spacing-sm); }
.mt-md { margin-top: var(--spacing-md); }
.mt-lg { margin-top: var(--spacing-lg); }
.mt-xl { margin-top: var(--spacing-xl); }
.mt-2xl { margin-top: var(--spacing-2xl); }
.mt-3xl { margin-top: var(--spacing-3xl); }

.mb-sm { margin-bottom: var(--spacing-sm); }
.mb-md { margin-bottom: var(--spacing-md); }
.mb-lg { margin-bottom: var(--spacing-lg); }
.mb-xl { margin-bottom: var(--spacing-xl); }
.mb-2xl { margin-bottom: var(--spacing-2xl); }
.mb-3xl { margin-bottom: var(--spacing-3xl); }

.hidden { display: none; }
.show { display: block; }

.grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--spacing-lg);
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--spacing-lg);
}

.grid-4 {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--spacing-lg);
}

@media (max-width: 1024px) {
  .grid-4 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .grid-2, .grid-3, .grid-4 {
    grid-template-columns: 1fr;
  }
}

/* ===== SECTION BASE ===== */
section {
  padding: var(--spacing-3xl) 0;
}

section.dark {
  background: linear-gradient(135deg, var(--luxury-900) 0%, var(--luxury-700) 50%, var(--luxury-800) 100%);
  color: var(--white);
}

section.dark h1,
section.dark h2,
section.dark h3 {
  color: var(--white);
}

/* ===== LINK STYLES ===== */
.link-arrow {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  transition: gap var(--transition-normal);
}

.link-arrow:hover {
  gap: var(--spacing-sm);
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar {
  width: 10px;
}

::-webkit-scrollbar-track {
  background: var(--off-white);
}

::-webkit-scrollbar-thumb {
  background: var(--gray-mid);
  border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--accent);
}

/* ===== FOCUS STATES ===== */
:focus-visible {
  outline: 2px solid var(--accent);
  outline-offset: 2px;
}