/* ============================================================
   Al-Nawras Marine Services — Design System & Main Stylesheet
   Specification: Doc 05 §5.1 (Tokens, Typography, Components)
   ============================================================ */

:root {
  /* 5.1.1 Colour Palette Tokens */
  --navy: #082a3a; /* Primary dark — navigation, headers, footer background */
  --teal: #087e89; /* Primary action — buttons, links, active states, CTA */
  --teal-hover: #06656e;
  --sand: #d7a64b; /* Accent — highlights, badges, urgency indicators */
  --sand-hover: #c49439;
  --mist: #f3f7f8; /* Light background — page body, card backgrounds */
  --dark: #17272f; /* Text — body text, headings on light backgrounds */
  --white: #ffffff; /* Pure white — card backgrounds, text on dark */
  --error: #d32f2f; /* Error states — validation errors, failed */
  --success: #2e7d32; /* Success states — confirmations, sent indicators */
  --warning: #f57c00; /* Warning states — urgency, attention needed */
  --border: rgba(23, 39, 47, 0.12);
  --border-light: rgba(255, 255, 255, 0.15);

  /* 5.1.2 Typography */
  --font-en: 'Inter', system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-ar: 'Noto Sans Arabic', 'Segoe UI', Tahoma, Arial, sans-serif;

  /* 5.1.3 Spacing Scale */
  --space-xs: 0.25rem; /* 4px */
  --space-sm: 0.5rem; /* 8px */
  --space-md: 1rem; /* 16px */
  --space-lg: 1.5rem; /* 24px */
  --space-xl: 2rem; /* 32px */
  --space-2xl: 3rem; /* 48px */
  --space-3xl: 4rem; /* 64px */

  /* Containers & Shadows */
  --container-max: 1200px;
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 12px rgba(8, 42, 58, 0.08);
  --shadow-lg: 0 10px 25px rgba(8, 42, 58, 0.12);
  --transition-fast: 0.15s ease-in-out;
  --transition-normal: 0.25s ease-in-out;
}

/* Base Reset & Typography */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-en);
  background-color: var(--mist);
  color: var(--dark);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

/* Accessibility: Skip Link & Focus States */
.skip-link {
  position: absolute;
  top: -60px;
  left: 20px;
  background: var(--sand);
  color: var(--dark);
  padding: 10px 16px;
  font-weight: 600;
  z-index: 9999;
  border-radius: 4px;
  text-decoration: none;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 15px;
}

:focus-visible {
  outline: 3px solid var(--teal);
  outline-offset: 2px;
}

/* Headings Hierarchy */
h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--navy);
  font-weight: 700;
  line-height: 1.3;
}

h1 {
  font-size: 2.25rem;
}
h2 {
  font-size: 1.75rem;
  margin-bottom: var(--space-md);
}
h3 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: var(--space-xs);
}
p {
  margin-bottom: var(--space-md);
}
p:last-child {
  margin-bottom: 0;
}

a {
  color: var(--teal);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--teal-hover);
  text-decoration: underline;
}

/* Layout Utilities */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--space-lg);
}

.main-content {
  flex: 1 0 auto;
}

.section {
  padding: var(--space-2xl) 0;
}

.section-alt {
  background-color: var(--white);
}

.section-dark {
  background-color: var(--navy);
  color: var(--white);
}

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

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto var(--space-2xl) auto;
}

.section-subtitle {
  font-size: 1.125rem;
  color: #4a5d68;
}

.section-dark .section-subtitle {
  color: #cbd5e1;
}

/* Header & Navigation */
.site-header {
  background-color: var(--navy);
  color: var(--white);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.2);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.brand-link {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: var(--white);
  text-decoration: none;
  font-weight: 700;
  font-size: 1.25rem;
  letter-spacing: -0.01em;
}

.brand-link:hover {
  text-decoration: none;
  color: var(--white);
}

.brand-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, var(--teal), var(--sand));
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--white);
}

.brand-icon svg {
  width: 22px;
  height: 22px;
  fill: currentColor;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-md);
  list-style: none;
}

.nav-link {
  color: #e2e8f0;
  font-size: 0.9375rem;
  font-weight: 500;
  padding: 8px 10px;
  border-radius: 6px;
  text-decoration: none;
  transition: all var(--transition-fast);
}

.nav-link:hover,
.nav-link[aria-current='page'] {
  color: var(--white);
  background-color: rgba(255, 255, 255, 0.08);
  text-decoration: none;
}

.nav-link[aria-current='page'] {
  border-bottom: 2px solid var(--sand);
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--space-md);
}

.lang-toggle {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: #cbd5e1;
  font-size: 0.875rem;
  font-weight: 600;
  padding: 6px 12px;
  border-radius: 6px;
  border: 1px solid var(--border-light);
  text-decoration: none;
  cursor: pointer;
  background: transparent;
}

.lang-toggle:hover {
  color: var(--white);
  border-color: var(--white);
  text-decoration: none;
}

.mobile-toggle-btn {
  display: none;
  background: transparent;
  border: 1px solid var(--border-light);
  color: var(--white);
  padding: 8px 12px;
  border-radius: 6px;
  cursor: pointer;
}

/* 5.1.4 Component Patterns: Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-xs);
  min-height: 44px;
  padding: 10px 20px;
  border-radius: 8px;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  text-decoration: none;
  border: 2px solid transparent;
  transition: all var(--transition-fast);
  white-space: nowrap;
}

.btn-sm {
  min-height: 38px;
  padding: 6px 14px;
  font-size: 0.875rem;
}

.btn-lg {
  min-height: 52px;
  padding: 14px 28px;
  font-size: 1.125rem;
}

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

.btn-primary:hover {
  background-color: var(--teal-hover);
  border-color: var(--teal-hover);
  color: var(--white);
  text-decoration: none;
}

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

.btn-secondary:hover {
  background-color: var(--mist);
  color: var(--teal-hover);
  border-color: var(--teal-hover);
  text-decoration: none;
}

.btn-accent {
  background-color: var(--sand);
  color: var(--dark);
  border-color: var(--sand);
}

.btn-accent:hover {
  background-color: var(--sand-hover);
  border-color: var(--sand-hover);
  color: var(--dark);
  text-decoration: none;
}

.btn-ghost {
  background-color: transparent;
  color: var(--teal);
  border-color: transparent;
}

.btn-ghost:hover {
  background-color: rgba(8, 126, 137, 0.08);
  color: var(--teal-hover);
  text-decoration: none;
}

.btn-outline-white {
  background-color: transparent;
  color: var(--white);
  border-color: rgba(255, 255, 255, 0.7);
}

.btn-outline-white:hover {
  background-color: rgba(255, 255, 255, 0.15);
  border-color: var(--white);
  color: var(--white);
  text-decoration: none;
}

/* Breadcrumbs */
.breadcrumb {
  padding: var(--space-md) 0;
  background-color: var(--white);
  border-bottom: 1px solid var(--border);
  font-size: 0.875rem;
}

.breadcrumb-list {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  list-style: none;
}

.breadcrumb-item::after {
  content: '/';
  margin-left: var(--space-sm);
  color: #94a3b8;
}

.breadcrumb-item:last-child::after {
  content: '';
}

.breadcrumb-item a {
  color: var(--teal);
}

.breadcrumb-item.active {
  color: #64748b;
  font-weight: 500;
}

/* Hero Section */
.hero-section {
  background: linear-gradient(135deg, #061e2a 0%, #082a3a 50%, #0c3e55 100%);
  color: var(--white);
  padding: var(--space-3xl) 0;
  position: relative;
  overflow: hidden;
}

.hero-section::after {
  content: '';
  position: absolute;
  top: -50%;
  right: -20%;
  width: 600px;
  height: 600px;
  background: radial-gradient(circle, rgba(8, 126, 137, 0.25) 0%, transparent 70%);
  pointer-events: none;
}

.hero-content {
  max-width: 820px;
  position: relative;
  z-index: 2;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
  background-color: rgba(215, 166, 75, 0.18);
  color: var(--sand);
  border: 1px solid rgba(215, 166, 75, 0.4);
  padding: 4px 12px;
  border-radius: 20px;
  font-size: 0.875rem;
  font-weight: 600;
  margin-bottom: var(--space-md);
}

.hero-title {
  font-size: 2.75rem;
  line-height: 1.2;
  margin-bottom: var(--space-md);
  color: var(--white);
}

.hero-description {
  font-size: 1.25rem;
  line-height: 1.6;
  color: #e2e8f0;
  margin-bottom: var(--space-xl);
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

/* Cards & Bento Grid */
.cards-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: var(--space-lg);
}

.card {
  background-color: var(--white);
  border: 1px solid rgba(0, 0, 0, 0.08);
  border-radius: 12px;
  padding: var(--space-lg);
  box-shadow: var(--shadow-sm);
  transition:
    transform var(--transition-normal),
    box-shadow var(--transition-normal);
  display: flex;
  flex-direction: column;
}

.card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.card-icon {
  width: 48px;
  height: 48px;
  border-radius: 10px;
  background-color: rgba(8, 126, 137, 0.1);
  color: var(--teal);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: var(--space-md);
}

.card-title {
  font-size: 1.25rem;
  color: var(--navy);
  margin-bottom: var(--space-xs);
}

.card-description {
  color: #475569;
  font-size: 0.9375rem;
  flex-grow: 1;
  margin-bottom: var(--space-md);
}

.card-footer {
  margin-top: auto;
  padding-top: var(--space-sm);
}

/* Offshore Feature Banner */
.offshore-banner {
  background: linear-gradient(135deg, #0b3246 0%, #082a3a 100%);
  border: 1px solid rgba(215, 166, 75, 0.3);
  border-radius: 16px;
  padding: var(--space-2xl);
  color: var(--white);
  display: flex;
  flex-direction: column;
  gap: var(--space-lg);
}

.offshore-banner h2 {
  color: var(--sand);
}

.offshore-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
}

/* Contact Fast Bar */
.contact-fast-bar {
  background-color: var(--navy);
  color: var(--white);
  padding: var(--space-lg) 0;
  border-top: 1px solid var(--border-light);
  border-bottom: 1px solid var(--border-light);
}

.contact-fast-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
  gap: var(--space-md);
  align-items: center;
}

.contact-fast-item {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  color: #e2e8f0;
}

.contact-fast-item a {
  color: var(--white);
  font-weight: 500;
}

.contact-fast-item a:hover {
  color: var(--sand);
}

/* Form Styles */
.form-card {
  background-color: var(--white);
  border: 1px solid var(--border);
  border-radius: 12px;
  padding: var(--space-2xl);
  box-shadow: var(--shadow-md);
  max-width: 860px;
  margin: 0 auto;
}

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

.form-group-full {
  grid-column: 1 / -1;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-xs);
}

.form-label {
  font-size: 0.9375rem;
  font-weight: 600;
  color: var(--navy);
}

.form-label .required {
  color: var(--error);
}

.form-input,
.form-select,
.form-textarea {
  font-family: inherit;
  font-size: 1rem;
  color: var(--dark);
  background-color: var(--white);
  border: 1px solid #cbd5e1;
  border-radius: 8px;
  padding: 12px 16px;
  min-height: 48px;
  transition:
    border-color var(--transition-fast),
    box-shadow var(--transition-fast);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(8, 126, 137, 0.2);
  outline: none;
}

.form-intent-toggle {
  display: flex;
  gap: var(--space-sm);
  margin-bottom: var(--space-lg);
  background-color: var(--mist);
  padding: 6px;
  border-radius: 10px;
}

.intent-tab {
  flex: 1;
  text-align: center;
  padding: 10px 16px;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  border: none;
  background: transparent;
  color: var(--dark);
  transition: all var(--transition-fast);
}

.intent-tab.active {
  background-color: var(--white);
  color: var(--teal);
  box-shadow: var(--shadow-sm);
}

.file-dropzone {
  border: 2px dashed #94a3b8;
  border-radius: 10px;
  padding: var(--space-xl);
  text-align: center;
  background-color: #f8fafc;
  cursor: pointer;
  transition:
    border-color var(--transition-fast),
    background-color var(--transition-fast);
}

.file-dropzone:hover {
  border-color: var(--teal);
  background-color: #f0fdfa;
}

.checkbox-label {
  display: flex;
  align-items: flex-start;
  gap: var(--space-sm);
  font-size: 0.9375rem;
  color: var(--dark);
  cursor: pointer;
}

.checkbox-label input[type='checkbox'] {
  width: 18px;
  height: 18px;
  margin-top: 3px;
  accent-color: var(--teal);
}

/* Footer */
.site-footer {
  background-color: var(--navy);
  color: #cbd5e1;
  padding: var(--space-3xl) 0 var(--space-lg) 0;
  border-top: 1px solid var(--border-light);
  font-size: 0.9375rem;
}

.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1.5fr 1.5fr;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer-col h3 {
  color: var(--white);
  font-size: 1.125rem;
  margin-bottom: var(--space-md);
  position: relative;
  padding-bottom: var(--space-xs);
}

.footer-col h3::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 32px;
  height: 2px;
  background-color: var(--sand);
}

.footer-col ul {
  list-style: none;
}

.footer-col ul li {
  margin-bottom: var(--space-xs);
}

.footer-col ul li a {
  color: #cbd5e1;
  text-decoration: none;
}

.footer-col ul li a:hover {
  color: var(--sand);
  text-decoration: underline;
}

.footer-bottom {
  border-top: 1px solid var(--border-light);
  padding-top: var(--space-lg);
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-md);
  font-size: 0.875rem;
}

/* Responsive Breakpoints */
@media (max-width: 1024px) {
  .footer-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (max-width: 768px) {
  .mobile-toggle-btn {
    display: inline-block;
  }

  .nav-menu {
    display: none;
    position: absolute;
    top: 76px;
    left: 0;
    right: 0;
    background-color: var(--navy);
    flex-direction: column;
    padding: var(--space-md);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.3);
    border-top: 1px solid var(--border-light);
  }

  .nav-menu.open {
    display: flex;
  }

  .nav-link {
    width: 100%;
    padding: 12px 16px;
  }

  .hero-title {
    font-size: 2rem;
  }

  .form-grid {
    grid-template-columns: 1fr;
  }

  .footer-grid {
    grid-template-columns: 1fr;
    gap: var(--space-xl);
  }

  .footer-bottom {
    flex-direction: column;
    text-align: center;
  }
}