/* ========================================
   Rod's Tools v4 - Modern Light Corporate Theme
   Pure CSS3 - No frameworks
   ======================================== */

/* ========================================
   CSS RESET & BASE
   ======================================== */

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

/* ========================================
   CSS VARIABLES - Light Corporate Theme
   ======================================== */

:root {
  /* Primary Colors - Professional Blue */
  --color-primary: #2563eb;
  --color-primary-light: #3b82f6;
  --color-primary-dark: #1e40af;
  --color-primary-50: #eff6ff;
  --color-primary-100: #dbeafe;

  /* Neutral Colors - Clean & Professional */
  --color-white: #ffffff;
  --color-gray-50: #f9fafb;
  --color-gray-100: #f3f4f6;
  --color-gray-200: #e5e7eb;
  --color-gray-300: #d1d5db;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-700: #374151;
  --color-gray-800: #1f2937;
  --color-gray-900: #111827;

  /* Accent Colors */
  --color-accent: #10b981;
  --color-accent-light: #34d399;

  /* Status Colors */
  --color-success: #10b981;
  --color-warning: #f59e0b;
  --color-error: #ef4444;

  /* Typography */
  --font-primary:
    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Font Sizes - 8px base system */
  --text-xs: 0.75rem; /* 12px */
  --text-sm: 0.875rem; /* 14px */
  --text-base: 1rem; /* 16px */
  --text-lg: 1.125rem; /* 18px */
  --text-xl: 1.25rem; /* 20px */
  --text-2xl: 1.5rem; /* 24px */
  --text-3xl: 1.875rem; /* 30px */
  --text-4xl: 2.25rem; /* 36px */
  --text-5xl: 3rem; /* 48px */

  /* Spacing - 8px system */
  --space-1: 0.5rem; /* 8px */
  --space-2: 1rem; /* 16px */
  --space-3: 1.5rem; /* 24px */
  --space-4: 2rem; /* 32px */
  --space-5: 2.5rem; /* 40px */
  --space-6: 3rem; /* 48px */
  --space-8: 4rem; /* 64px */
  --space-10: 5rem; /* 80px */
  --space-12: 6rem; /* 96px */

  /* Layout */
  --container-max: 1200px;
  --container-padding: var(--space-4);

  /* Border Radius */
  --radius-sm: 0.375rem; /* 6px */
  --radius-md: 0.5rem; /* 8px */
  --radius-lg: 0.75rem; /* 12px */
  --radius-xl: 1rem; /* 16px */
  --radius-full: 9999px;

  /* Shadows */
  --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
  --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-base: 200ms ease;
  --transition-slow: 300ms ease;

  /* Z-index */
  --z-dropdown: 1000;
  --z-sticky: 1020;
  --z-fixed: 1030;
  --z-modal: 1040;
  --z-popover: 1050;
  --z-tooltip: 1060;
}

/* ========================================
   BASE STYLES
   ======================================== */

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

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  font-weight: var(--font-weight-regular);
  line-height: 1.6;
  color: var(--color-gray-700);
  background-color: var(--color-white);
  background-image: url("data:image/svg+xml,%3Csvg width='300' height='300' xmlns='http://www.w3.org/2000/svg'%3E%3Cdefs%3E%3Cpattern id='neural' x='0' y='0' width='300' height='300' patternUnits='userSpaceOnUse'%3E%3Cg opacity='0.12'%3E%3Ccircle cx='25' cy='35' r='1.5' fill='%232563eb'/%3E%3Ccircle cx='95' cy='75' r='3' fill='%232563eb'/%3E%3Ccircle cx='165' cy='45' r='2' fill='%232563eb'/%3E%3Ccircle cx='55' cy='135' r='2.5' fill='%232563eb'/%3E%3Ccircle cx='185' cy='165' r='1' fill='%232563eb'/%3E%3Ccircle cx='125' cy='195' r='3.5' fill='%232563eb'/%3E%3Ccircle cx='220' cy='90' r='2' fill='%232563eb'/%3E%3Ccircle cx='45' cy='220' r='1.5' fill='%232563eb'/%3E%3Ccircle cx='270' cy='130' r='2.5' fill='%232563eb'/%3E%3Ccircle cx='150' cy='260' r='1' fill='%232563eb'/%3E%3Ccircle cx='200' cy='240' r='3' fill='%232563eb'/%3E%3Ccircle cx='80' cy='280' r='2' fill='%232563eb'/%3E%3Cline x1='25' y1='35' x2='95' y2='75' stroke='%232563eb' stroke-width='0.5'/%3E%3Cline x1='95' y1='75' x2='165' y2='45' stroke='%232563eb' stroke-width='0.5'/%3E%3Cline x1='25' y1='35' x2='55' y2='135' stroke='%232563eb' stroke-width='0.5'/%3E%3Cline x1='165' y1='45' x2='220' y2='90' stroke='%232563eb' stroke-width='0.5'/%3E%3Cline x1='55' y1='135' x2='125' y2='195' stroke='%232563eb' stroke-width='0.5'/%3E%3Cline x1='95' y1='75' x2='55' y2='135' stroke='%232563eb' stroke-width='0.5'/%3E%3Cline x1='185' y1='165' x2='270' y2='130' stroke='%232563eb' stroke-width='0.5'/%3E%3Cline x1='125' y1='195' x2='150' y2='260' stroke='%232563eb' stroke-width='0.5'/%3E%3Cline x1='45' y1='220' x2='80' y2='280' stroke='%232563eb' stroke-width='0.5'/%3E%3Cline x1='200' y1='240' x2='150' y2='260' stroke='%232563eb' stroke-width='0.5'/%3E%3C/g%3E%3C/pattern%3E%3C/defs%3E%3Crect width='300' height='300' fill='url(%23neural)'/%3E%3C/svg%3E");
  background-size: 300px 300px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ========================================
   TYPOGRAPHY
   ======================================== */

h1,
h2,
h3,
h4,
h5,
h6 {
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  color: var(--color-gray-900);
  margin-bottom: var(--space-2);
}

h1 {
  font-size: var(--text-5xl);
}
h2 {
  font-size: var(--text-4xl);
}
h3 {
  font-size: var(--text-3xl);
}
h4 {
  font-size: var(--text-2xl);
}
h5 {
  font-size: var(--text-xl);
}
h6 {
  font-size: var(--text-lg);
}

p {
  margin-bottom: var(--space-2);
}

a {
  color: var(--color-primary);
  text-decoration: none;
  transition: color var(--transition-base);
}

a:hover {
  color: var(--color-primary-dark);
}

/* ========================================
   LAYOUT UTILITIES
   ======================================== */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: var(--space-12) 0;
}

.section-sm {
  padding: var(--space-8) 0;
}

.section-lg {
  padding: var(--space-16) 0;
}

/* ========================================
   NAVIGATION
   ======================================== */

.navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  background-color: var(--color-white);
  border-bottom: 1px solid var(--color-gray-200);
  z-index: var(--z-sticky);
  transition: box-shadow var(--transition-base);
}

.navbar.scrolled {
  box-shadow: var(--shadow-md);
}

.navbar .container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.navbar-brand {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-xl);
  font-weight: var(--font-weight-bold);
  color: var(--color-gray-900);
}

.navbar-brand:hover {
  color: var(--color-gray-900);
}

.logo-img {
  height: 90px;
  width: auto;
}

.logo-initial {
  height: 32px;
  width: auto;
}

.nav-menu {
  display: flex;
  align-items: center;
  gap: var(--space-4);
  list-style: none;
}

.nav-link {
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-gray-600);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-md);
  transition: all var(--transition-base);
}

.nav-link:hover {
  color: var(--color-primary);
  background-color: var(--color-primary-50);
}

.nav-link.active {
  color: var(--color-primary);
  font-weight: var(--font-weight-semibold);
}

.menu-toggle {
  display: none;
  flex-direction: column;
  gap: 4px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-1);
}

.menu-toggle span {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-gray-700);
  transition: all var(--transition-base);
}

/* ========================================
   BUTTONS
   ======================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-1);
  padding: 0.625rem 1.25rem;
  font-size: var(--text-sm);
  font-weight: var(--font-weight-medium);
  line-height: 1.5;
  border-radius: var(--radius-md);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-base);
  text-decoration: none;
}

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

.btn-primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  color: var(--color-white);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

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

.btn-secondary:hover {
  background-color: var(--color-primary-50);
  color: var(--color-primary-dark);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-gray-700);
  border-color: var(--color-gray-300);
}

.btn-outline:hover {
  background-color: var(--color-gray-50);
  border-color: var(--color-gray-400);
}

.btn-lg {
  padding: 0.875rem 1.75rem;
  font-size: var(--text-base);
}

.btn-sm {
  padding: 0.5rem 1rem;
  font-size: var(--text-xs);
}

/* ========================================
   HERO SECTION
   ======================================== */

.hero {
  padding-top: calc(72px + var(--space-12));
  padding-bottom: var(--space-12);
  background: linear-gradient(
    135deg,
    var(--color-gray-50) 0%,
    var(--color-white) 100%
  );
}

.hero-content {
  max-width: 800px;
  margin: 0 auto;
  text-align: center;
}

.hero-title {
  font-size: clamp(2rem, 5vw, 3.5rem);
  margin-bottom: var(--space-3);
  color: var(--color-gray-900);
}

.hero-subtitle {
  font-size: var(--text-xl);
  color: var(--color-gray-600);
  margin-bottom: var(--space-6);
  line-height: 1.6;
}

.hero-cta {
  display: flex;
  gap: var(--space-3);
  justify-content: center;
  flex-wrap: wrap;
}

.text-primary {
  color: var(--color-primary);
}

/* ========================================
   CARDS
   ======================================== */

.card {
  background-color: var(--color-white);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  border: 1px solid var(--color-gray-200);
  transition: all var(--transition-base);
}

.card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.card-title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-2);
}

.card-text {
  color: var(--color-gray-600);
  line-height: 1.6;
}

/* ========================================
   GRID LAYOUTS
   ======================================== */

.grid {
  display: grid;
  gap: var(--space-4);
}

.grid-cols-1 {
  grid-template-columns: repeat(1, 1fr);
}
.grid-cols-2 {
  grid-template-columns: repeat(2, 1fr);
}
.grid-cols-3 {
  grid-template-columns: repeat(3, 1fr);
}
.grid-cols-4 {
  grid-template-columns: repeat(4, 1fr);
}

/* ========================================
   SERVICES SECTION
   ======================================== */

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

.section-header {
  text-align: center;
  max-width: 700px;
  margin: 0 auto var(--space-8);
}

.section-label {
  display: inline-block;
  font-size: var(--text-sm);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-2);
}

.section-title {
  font-size: var(--text-4xl);
  color: var(--color-gray-900);
  margin-bottom: var(--space-3);
}

.section-description {
  font-size: var(--text-lg);
  color: var(--color-gray-600);
}

.service-card {
  padding: var(--space-6);
  background-color: var(--color-white);
  border: 1px solid var(--color-gray-200);
  border-radius: var(--radius-lg);
  transition: all var(--transition-base);
}

.service-card:hover {
  border-color: var(--color-primary);
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
}

.service-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: var(--color-primary-50);
  border-radius: var(--radius-lg);
  margin-bottom: var(--space-3);
  color: var(--color-primary);
}

.service-title {
  font-size: var(--text-xl);
  margin-bottom: var(--space-2);
}

.service-description {
  color: var(--color-gray-600);
  margin-bottom: var(--space-3);
  line-height: 1.6;
}

.service-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
  font-size: var(--text-sm);
}

.service-link:hover {
  gap: var(--space-2);
}

/* ========================================
   FOOTER
   ======================================== */

.footer {
  background-color: var(--color-gray-900);
  color: var(--color-gray-300);
  padding: var(--space-10) 0 var(--space-4);
}

.footer-content {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
  gap: var(--space-6);
  margin-bottom: var(--space-8);
}

.footer-section h3,
.footer-section h4 {
  color: var(--color-white);
  margin-bottom: var(--space-3);
  font-size: var(--text-lg);
}

.footer-links {
  list-style: none;
}

.footer-links li {
  margin-bottom: var(--space-2);
}

.footer-links a {
  color: var(--color-gray-400);
  transition: color var(--transition-base);
}

.footer-links a:hover {
  color: var(--color-white);
}

.footer-bottom {
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-gray-800);
  text-align: center;
  color: var(--color-gray-500);
  font-size: var(--text-sm);
}

/* ========================================
   RESPONSIVE DESIGN
   ======================================== */

@media (max-width: 768px) {
  .menu-toggle {
    display: flex;
  }

  .nav-menu {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    flex-direction: column;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-gray-200);
    padding: var(--space-4);
    gap: var(--space-2);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: all var(--transition-base);
  }

  .nav-menu.active {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-link {
    width: 100%;
    text-align: center;
  }

  .hero-cta {
    flex-direction: column;
  }

  .grid-cols-2,
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: 1fr;
  }
}

@media (min-width: 769px) and (max-width: 1024px) {
  .grid-cols-3,
  .grid-cols-4 {
    grid-template-columns: repeat(2, 1fr);
  }
}

/* ========================================
   UTILITY CLASSES
   ======================================== */

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

.mt-1 {
  margin-top: var(--space-1);
}
.mt-2 {
  margin-top: var(--space-2);
}
.mt-3 {
  margin-top: var(--space-3);
}
.mt-4 {
  margin-top: var(--space-4);
}
.mt-6 {
  margin-top: var(--space-6);
}
.mt-8 {
  margin-top: var(--space-8);
}

.mb-1 {
  margin-bottom: var(--space-1);
}
.mb-2 {
  margin-bottom: var(--space-2);
}
.mb-3 {
  margin-bottom: var(--space-3);
}
.mb-4 {
  margin-bottom: var(--space-4);
}
.mb-6 {
  margin-bottom: var(--space-6);
}
.mb-8 {
  margin-bottom: var(--space-8);
}

.hidden {
  display: none;
}
.block {
  display: block;
}
.inline-block {
  display: inline-block;
}
.flex {
  display: flex;
}
.inline-flex {
  display: inline-flex;
}