/**
 * Kapil Cutting Tools - Core Design System & CSS Variables
 *
 * @package KapilCuttingTools
 */

:root {
  /* Color Tokens */
  --kct-navy: #0B1F33;
  --kct-navy-dark: #06121E;
  --kct-steel-blue: #1769AA;
  --kct-steel-blue-light: #2196F3;
  --kct-clean-white: #FFFFFF;
  --kct-light-grey: #F3F6F8;
  --kct-border-grey: #E2E7EC;
  --kct-graphite: #252B31;
  --kct-metallic: #7E8992;
  --kct-accent-red: #D32F2F;
  --kct-accent-red-hover: #B71C1C;
  --kct-whatsapp-green: #25D366;

  /* Typography */
  --kct-font-sans: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Oxygen, Ubuntu, Cantarell, "Helvetica Neue", sans-serif;
  
  /* Layout Spacing */
  --kct-container-width: 1280px;
  --kct-radius-sm: 4px;
  --kct-radius-md: 8px;
  --kct-radius-lg: 12px;
  
  /* Shadows & Elevation */
  --kct-shadow-subtle: 0 2px 8px rgba(11, 31, 51, 0.06);
  --kct-shadow-card: 0 4px 16px rgba(11, 31, 51, 0.08);
  --kct-shadow-hover: 0 8px 24px rgba(11, 31, 51, 0.14);
  
  /* Transitions */
  --kct-transition: all 0.25s cubic-bezier(0.16, 1, 0.3, 1);
}

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

html {
  font-family: var(--kct-font-sans);
  font-size: 16px;
  line-height: 1.6;
  color: var(--kct-graphite);
  background-color: var(--kct-clean-white);
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  overflow-x: hidden;
  display: flex;
  flex-direction: column;
  min-height: 100vh;
}

/* Typography Hierarchy */
h1, h2, h3, h4, h5, h6 {
  color: var(--kct-navy);
  font-weight: 700;
  line-height: 1.25;
  margin-bottom: 0.75rem;
  letter-spacing: -0.01em;
}

h1 { font-size: clamp(2rem, 4.5vw, 3.25rem); }
h2 { font-size: clamp(1.6rem, 3.2vw, 2.3rem); }
h3 { font-size: clamp(1.25rem, 2.2vw, 1.6rem); }
h4 { font-size: clamp(1.1rem, 1.8vw, 1.3rem); }

p {
  margin-bottom: 1rem;
  color: #374151;
}

p:last-child {
  margin-bottom: 0;
}

a {
  color: var(--kct-steel-blue);
  text-decoration: none;
  transition: var(--kct-transition);
}

a:hover {
  color: var(--kct-navy);
}

ul, ol {
  list-style: none;
}

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

/* Container Utility */
.kct-container {
  width: 100%;
  max-width: var(--kct-container-width);
  margin-left: auto;
  margin-right: auto;
  padding-left: 1.25rem;
  padding-right: 1.25rem;
}

/* Skip Link */
.kct-skip-link {
  position: absolute;
  top: -100px;
  left: 1rem;
  background: var(--kct-navy);
  color: var(--kct-clean-white);
  padding: 0.75rem 1.25rem;
  z-index: 9999;
  border-radius: var(--kct-radius-sm);
  font-weight: 600;
}

.kct-skip-link:focus {
  top: 1rem;
}

/* Top Contact Bar */
.kct-top-bar {
  background-color: var(--kct-navy-dark);
  color: #D1D5DB;
  font-size: 0.85rem;
  padding: 0.5rem 0;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.kct-top-bar .kct-container {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.kct-top-info, .kct-top-actions {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.kct-top-info a, .kct-top-actions a {
  color: #E5E7EB;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-weight: 500;
}

.kct-top-info a:hover, .kct-top-actions a:hover {
  color: var(--kct-clean-white);
}

/* Sticky Main Header */
.kct-header {
  position: sticky;
  top: 0;
  z-index: 1000;
  background: var(--kct-clean-white);
  box-shadow: var(--kct-shadow-subtle);
  transition: var(--kct-transition);
}

.kct-header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.85rem 0;
}

.kct-brand-logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  font-weight: 800;
  font-size: 1.35rem;
  color: var(--kct-navy);
  letter-spacing: -0.02em;
}

.kct-logo-mark {
  width: 44px;
  height: 44px;
  background: linear-gradient(135deg, var(--kct-navy), var(--kct-steel-blue));
  color: var(--kct-clean-white);
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 6px;
  font-size: 1.1rem;
  font-weight: 900;
  letter-spacing: 0;
  box-shadow: 0 2px 6px rgba(11, 31, 51, 0.2);
}

.kct-brand-text span {
  display: block;
  font-size: 0.7rem;
  font-weight: 600;
  color: var(--kct-metallic);
  letter-spacing: 0.08em;
  text-transform: uppercase;
  margin-top: -3px;
}

/* Navigation Links */
.kct-nav {
  display: flex;
  align-items: center;
  gap: 1.75rem;
}

.kct-nav a {
  color: var(--kct-graphite);
  font-weight: 600;
  font-size: 0.95rem;
  padding: 0.5rem 0;
  position: relative;
}

.kct-nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0%;
  height: 2px;
  background-color: var(--kct-steel-blue);
  transition: var(--kct-transition);
}

.kct-nav a:hover, .kct-nav a.active {
  color: var(--kct-steel-blue);
}

.kct-nav a:hover::after, .kct-nav a.active::after {
  width: 100%;
}

.kct-header-ctas {
  display: flex;
  align-items: center;
  gap: 0.75rem;
}

/* Footer Styling */
.kct-footer {
  background-color: var(--kct-navy-dark);
  color: #9CA3AF;
  font-size: 0.9rem;
  padding-top: 4rem;
  padding-bottom: 2rem;
  margin-top: auto;
  border-top: 4px solid var(--kct-steel-blue);
}

.kct-footer-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 2.5rem;
  margin-bottom: 3rem;
}

.kct-footer-col h4 {
  color: var(--kct-clean-white);
  font-size: 1.1rem;
  margin-bottom: 1.25rem;
  position: relative;
  padding-bottom: 0.5rem;
}

.kct-footer-col h4::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 32px;
  height: 2px;
  background-color: var(--kct-steel-blue);
}

.kct-footer-links li {
  margin-bottom: 0.65rem;
}

.kct-footer-links a {
  color: #D1D5DB;
  font-size: 0.9rem;
}

.kct-footer-links a:hover {
  color: var(--kct-clean-white);
  padding-left: 4px;
}

.kct-footer-disclaimer {
  background: rgba(255, 255, 255, 0.04);
  padding: 1.25rem;
  border-radius: var(--kct-radius-md);
  border-left: 3px solid var(--kct-metallic);
  font-size: 0.825rem;
  line-height: 1.5;
  margin-bottom: 2rem;
  color: #9CA3AF;
}

.kct-footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: 1rem;
  padding-top: 1.5rem;
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  font-size: 0.85rem;
}