/* =====================================================
   CREVION COMMONS - Global Stylesheet
   ===================================================== */

/* ===================
   1. CSS Custom Properties (Global UI Tokens)
   =================== */
:root {
  /* Primary Colors */
  --axon-neural-blue: #0B3C5D;
  --axon-signal-cyan: #1ECBE1;
  --axon-alloy-gold: #F2A900;
  --axon-charcoal: #1A1A1A;
  --axon-soft-bone: #F5F7FA;
  --axon-slate-muted: #6B7C93;

  /* Derived Colors */
  --axon-blue-hover: #082F49;
  --axon-gold-hover: #D99600;
  --axon-error-red: #B94A48;
  --axon-border-light: #E1E6EB;
  --axon-input-border: #D1D9E0;
  --axon-disabled-bg: #EEF1F4;

  /* Typography */
  --font-primary: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --font-weight-normal: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  /* Spacing */
  --space-xs: 0.25rem;
  --space-sm: 0.5rem;
  --space-md: 1rem;
  --space-lg: 1.5rem;
  --space-xl: 2rem;
  --space-2xl: 3rem;
  --space-3xl: 4rem;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 6px;
  --radius-lg: 8px;

  /* Transitions */
  --transition-fast: 200ms ease-out;
  --transition-medium: 300ms ease-out;

  /* Container */
  --container-max: 1200px;
  --container-padding: 1rem;
}

/* ===================
   2. CSS Reset & Base Styles
   =================== */
*,
*::before,
*::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

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

body {
  font-family: var(--font-primary);
  font-weight: var(--font-weight-normal);
  line-height: 1.6;
  color: var(--axon-charcoal);
  background-color: var(--axon-soft-bone);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a {
  color: var(--axon-neural-blue);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--axon-signal-cyan);
}

ul, ol {
  list-style: none;
}

/* ===================
   3. Typography
   =================== */
h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: 1.2;
  color: var(--axon-charcoal);
}

h1 {
  font-size: clamp(2rem, 5vw, 3rem);
  margin-bottom: var(--space-lg);
}

h2 {
  font-size: clamp(1.5rem, 4vw, 2.25rem);
  margin-bottom: var(--space-md);
}

h3 {
  font-size: clamp(1.25rem, 3vw, 1.5rem);
  margin-bottom: var(--space-sm);
}

p {
  margin-bottom: var(--space-md);
  color: var(--axon-slate-muted);
}

.text-highlight {
  color: var(--axon-neural-blue);
  font-weight: var(--font-weight-semibold);
}

/* ===================
   4. Layout & Container
   =================== */
.container {
  width: 100%;
  max-width: var(--container-max);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

.section {
  padding: var(--space-3xl) 0;
}

.section--dark {
  background-color: var(--axon-neural-blue);
  color: var(--axon-soft-bone);
}

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

.section--dark p {
  color: rgba(245, 247, 250, 0.85);
}

main {
  flex: 1;
}

/* ===================
   5. Navigation
   =================== */
.header {
  background-color: var(--axon-neural-blue);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header__container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: var(--space-lg) var(--container-padding);
  max-width: var(--container-max);
  margin: 0 auto;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  transition: transform 200ms ease;
}

.header__logo:hover {
  transform: scale(1.05);
}

.header__logo img {
  height: 90px;
  width: auto;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.2));
}

@media (min-width: 1024px) {
  .header__logo img {
    height: 108px;
  }
}

.header__logo-text {
  color: var(--axon-soft-bone);
  font-size: 1.25rem;
  font-weight: var(--font-weight-bold);
}

.nav {
  display: none;
}

.nav--active {
  display: flex;
  flex-direction: column;
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background-color: var(--axon-neural-blue);
  padding: var(--space-md);
  box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.nav__list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.nav__link {
  color: var(--axon-soft-bone);
  padding: var(--space-sm) var(--space-md);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-fast), color var(--transition-fast);
  display: block;
}

.nav__link:hover,
.nav__link--active {
  background-color: rgba(30, 203, 225, 0.15);
  color: var(--axon-signal-cyan);
}

.nav__link--active {
  color: var(--axon-signal-cyan);
}

/* Mobile Menu Toggle */
.menu-toggle {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.menu-toggle__bar {
  width: 25px;
  height: 3px;
  background-color: var(--axon-soft-bone);
  border-radius: 2px;
  transition: transform var(--transition-fast), opacity var(--transition-fast);
}

.menu-toggle--active .menu-toggle__bar:nth-child(1) {
  transform: rotate(45deg) translate(6px, 6px);
}

.menu-toggle--active .menu-toggle__bar:nth-child(2) {
  opacity: 0;
}

.menu-toggle--active .menu-toggle__bar:nth-child(3) {
  transform: rotate(-45deg) translate(6px, -6px);
}

/* Desktop Navigation */
@media (min-width: 768px) {
  .nav {
    display: flex;
  }

  .nav__list {
    flex-direction: row;
    gap: var(--space-xs);
  }

  .menu-toggle {
    display: none;
  }
}

/* ===================
   6. Buttons
   =================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: var(--space-sm) var(--space-lg);
  font-family: var(--font-primary);
  font-size: 1rem;
  font-weight: var(--font-weight-semibold);
  border-radius: var(--radius-lg);
  border: 2px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
}

.btn:focus {
  outline: 2px solid var(--axon-signal-cyan);
  outline-offset: 2px;
}

/* Primary Button */
.btn--primary {
  background-color: var(--axon-neural-blue);
  color: var(--axon-soft-bone);
  border-color: var(--axon-neural-blue);
}

.btn--primary:hover {
  background-color: var(--axon-blue-hover);
  border-color: var(--axon-blue-hover);
  color: var(--axon-soft-bone);
}

.btn--primary:disabled {
  background-color: var(--axon-slate-muted);
  border-color: var(--axon-slate-muted);
  cursor: not-allowed;
}

/* Secondary Button */
.btn--secondary {
  background-color: transparent;
  color: var(--axon-neural-blue);
  border-color: var(--axon-neural-blue);
}

.btn--secondary:hover {
  background-color: rgba(11, 60, 93, 0.08);
  color: var(--axon-neural-blue);
}

/* Accent Button (Gold) */
.btn--accent {
  background-color: var(--axon-alloy-gold);
  color: var(--axon-charcoal);
  border-color: var(--axon-alloy-gold);
}

.btn--accent:hover {
  background-color: var(--axon-gold-hover);
  border-color: var(--axon-gold-hover);
  color: var(--axon-charcoal);
}

/* Button on dark backgrounds */
.section--dark .btn--secondary {
  color: var(--axon-soft-bone);
  border-color: var(--axon-soft-bone);
}

.section--dark .btn--secondary:hover {
  background-color: rgba(245, 247, 250, 0.1);
  color: var(--axon-soft-bone);
}

/* Button Group */
.btn-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-md);
  margin-top: var(--space-lg);
}

/* ===================
   7. Cards
   =================== */
.card {
  background-color: var(--axon-soft-bone);
  border: 1px solid var(--axon-border-light);
  border-radius: var(--radius-lg);
  padding: var(--space-xl);
  transition: box-shadow var(--transition-medium), border-color var(--transition-medium);
}

.card:hover {
  box-shadow: 0 4px 20px rgba(0, 0, 0, 0.08);
  border-top: 2px solid var(--axon-signal-cyan);
}

.card__title {
  color: var(--axon-charcoal);
  margin-bottom: var(--space-sm);
}

.card__text {
  color: var(--axon-slate-muted);
}

/* Featured Card */
.card--featured {
  background-color: #ffffff;
  border: 1px solid var(--axon-alloy-gold);
}

.card--featured .card__title {
  color: var(--axon-neural-blue);
}

/* Dark Card */
.card--dark {
  background-color: var(--axon-neural-blue);
  border-color: var(--axon-neural-blue);
}

.card--dark .card__title {
  color: var(--axon-soft-bone);
}

.card--dark .card__text {
  color: rgba(245, 247, 250, 0.85);
}

/* Card Grid */
.card-grid {
  display: grid;
  gap: var(--space-xl);
  grid-template-columns: 1fr;
}

@media (min-width: 640px) {
  .card-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .card-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ===================
   8. Hero Section
   =================== */
.hero {
  position: relative;
  min-height: 80vh;
  display: flex;
  align-items: center;
  background-color: var(--axon-neural-blue);
  overflow: hidden;
}

.hero__background {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.hero__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.3;
}

.hero__content {
  position: relative;
  z-index: 2;
  max-width: 800px;
}

.hero__headline {
  color: var(--axon-soft-bone);
  font-size: clamp(2.5rem, 6vw, 4rem);
  margin-bottom: var(--space-md);
}

.hero__subheadline {
  color: rgba(245, 247, 250, 0.9);
  font-size: clamp(1.125rem, 2.5vw, 1.5rem);
  font-weight: var(--font-weight-normal);
  margin-bottom: var(--space-xl);
}

.hero .btn--secondary {
  background-color: rgba(245, 247, 250, 0.15);
  color: var(--axon-soft-bone);
  border: 2px solid var(--axon-soft-bone);
  backdrop-filter: blur(4px);
}

.hero .btn--secondary:hover {
  background-color: rgba(245, 247, 250, 0.3);
  color: var(--axon-soft-bone);
}

/* ===================
   9. Forms & Inputs
   =================== */
.form {
  max-width: 600px;
}

.form__group {
  margin-bottom: var(--space-lg);
}

.form__label {
  display: block;
  color: var(--axon-charcoal);
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-xs);
}

.form__input,
.form__textarea,
.form__select {
  width: 100%;
  padding: var(--space-sm) var(--space-md);
  font-family: var(--font-primary);
  font-size: 1rem;
  color: var(--axon-charcoal);
  background-color: #ffffff;
  border: 1px solid var(--axon-input-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form__input::placeholder,
.form__textarea::placeholder {
  color: var(--axon-slate-muted);
}

.form__input:focus,
.form__textarea:focus,
.form__select:focus {
  outline: none;
  border-color: var(--axon-signal-cyan);
  box-shadow: 0 0 0 3px rgba(30, 203, 225, 0.15);
}

.form__input--error,
.form__textarea--error {
  border-color: var(--axon-error-red);
}

.form__input:disabled,
.form__textarea:disabled {
  background-color: var(--axon-disabled-bg);
  cursor: not-allowed;
}

.form__textarea {
  min-height: 150px;
  resize: vertical;
}

.form__error {
  color: var(--axon-error-red);
  font-size: 0.875rem;
  margin-top: var(--space-xs);
  display: none;
}

.form__error--visible {
  display: block;
}

/* ===================
   10. Alerts & Status
   =================== */
.alert {
  padding: var(--space-md) var(--space-lg);
  border-radius: var(--radius-md);
  margin-bottom: var(--space-lg);
}

.alert--success {
  background-color: rgba(30, 203, 225, 0.1);
  color: var(--axon-signal-cyan);
  border: 1px solid var(--axon-signal-cyan);
}

.alert--info {
  background-color: rgba(11, 60, 93, 0.08);
  color: var(--axon-neural-blue);
  border: 1px solid var(--axon-neural-blue);
}

.alert--warning {
  background-color: rgba(242, 169, 0, 0.15);
  color: var(--axon-alloy-gold);
  border: 1px solid var(--axon-alloy-gold);
}

.alert--error {
  background-color: rgba(185, 74, 72, 0.12);
  color: var(--axon-error-red);
  border: 1px solid var(--axon-error-red);
}

/* ===================
   11. Feature Sections
   =================== */
.features {
  display: grid;
  gap: var(--space-xl);
}

.feature {
  display: flex;
  flex-direction: column;
  gap: var(--space-md);
}

.feature__icon {
  width: 48px;
  height: 48px;
  display: flex;
  align-items: center;
  justify-content: center;
  background-color: rgba(30, 203, 225, 0.1);
  border-radius: var(--radius-md);
  color: var(--axon-signal-cyan);
}

.feature__title {
  color: var(--axon-charcoal);
}

.feature__text {
  color: var(--axon-slate-muted);
}

@media (min-width: 768px) {
  .features {
    grid-template-columns: repeat(2, 1fr);
  }
}

@media (min-width: 1024px) {
  .features {
    grid-template-columns: repeat(3, 1fr);
  }
}

/* ===================
   12. Page Header
   =================== */
.page-header {
  background-color: var(--axon-neural-blue);
  padding: var(--space-3xl) 0;
  position: relative;
  overflow: hidden;
}

.page-header__background {
  position: absolute;
  inset: 0;
  z-index: 1;
}

.page-header__image {
  width: 100%;
  height: 100%;
  object-fit: cover;
  opacity: 0.2;
}

.page-header__content {
  position: relative;
  z-index: 2;
}

.page-header__title {
  color: var(--axon-soft-bone);
  margin-bottom: var(--space-sm);
}

.page-header__subtitle {
  color: rgba(245, 247, 250, 0.85);
  font-size: 1.25rem;
}

/* ===================
   13. Content Sections
   =================== */
.content-block {
  margin-bottom: var(--space-3xl);
}

.content-block:last-child {
  margin-bottom: 0;
}

.content-block__title {
  color: var(--axon-neural-blue);
  margin-bottom: var(--space-md);
}

.content-block__lead {
  font-size: 1.125rem;
  font-weight: var(--font-weight-semibold);
  color: var(--axon-charcoal);
}

/* List Styles */
.list {
  margin: var(--space-md) 0;
}

.list__item {
  position: relative;
  padding-left: var(--space-lg);
  margin-bottom: var(--space-sm);
  color: var(--axon-slate-muted);
}

.list__item::before {
  content: '';
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 8px;
  height: 8px;
  background-color: var(--axon-signal-cyan);
  border-radius: 50%;
}

.list__item strong {
  color: var(--axon-charcoal);
}

/* Numbered List */
.list--numbered {
  counter-reset: list-counter;
}

.list--numbered .list__item {
  padding-left: var(--space-2xl);
}

.list--numbered .list__item::before {
  content: counter(list-counter);
  counter-increment: list-counter;
  width: 28px;
  height: 28px;
  background-color: var(--axon-neural-blue);
  color: var(--axon-soft-bone);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.875rem;
  font-weight: var(--font-weight-bold);
  top: 0;
}

/* ===================
   14. Footer
   =================== */
.footer {
  background-color: var(--axon-charcoal);
  color: var(--axon-soft-bone);
  padding: var(--space-3xl) 0 var(--space-xl);
  margin-top: auto;
}

.footer__content {
  display: grid;
  gap: var(--space-xl);
  margin-bottom: var(--space-xl);
}

.footer__logo img {
  height: 80px;
  margin-bottom: var(--space-lg);
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.3));
}

@media (min-width: 768px) {
  .footer__logo img {
    height: 100px;
  }
}

.footer__nav-title {
  color: var(--axon-soft-bone);
  font-size: 1rem;
  font-weight: var(--font-weight-semibold);
  margin-bottom: var(--space-md);
}

.footer__nav-list {
  display: flex;
  flex-direction: column;
  gap: var(--space-sm);
}

.footer__nav-link {
  color: rgba(245, 247, 250, 0.7);
  font-size: 0.875rem;
  transition: color var(--transition-fast);
}

.footer__nav-link:hover {
  color: var(--axon-signal-cyan);
}

.footer__bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid rgba(245, 247, 250, 0.1);
  text-align: center;
}

.footer__copyright {
  color: rgba(245, 247, 250, 0.5);
  font-size: 0.875rem;
}

@media (min-width: 768px) {
  .footer__content {
    grid-template-columns: 2fr 1fr 1fr;
  }
}

/* ===================
   15. Utilities
   =================== */
.text-center {
  text-align: center;
}

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

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

.mb-0 { margin-bottom: 0; }
.mb-sm { margin-bottom: var(--space-sm); }
.mb-md { margin-bottom: var(--space-md); }
.mb-lg { margin-bottom: var(--space-lg); }
.mb-xl { margin-bottom: var(--space-xl); }

.mt-0 { margin-top: 0; }
.mt-sm { margin-top: var(--space-sm); }
.mt-md { margin-top: var(--space-md); }
.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }

.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

/* ===================
   16. Accessibility
   =================== */
@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }

  html {
    scroll-behavior: auto;
  }
}

/* Focus visible for keyboard navigation */
:focus-visible {
  outline: 2px solid var(--axon-signal-cyan);
  outline-offset: 2px;
}

/* Skip link */
.skip-link {
  position: absolute;
  top: -40px;
  left: 0;
  background: var(--axon-neural-blue);
  color: var(--axon-soft-bone);
  padding: var(--space-sm) var(--space-md);
  z-index: 9999;
  transition: top var(--transition-fast);
}

.skip-link:focus {
  top: 0;
}