/* ============================================
   GATMEDI - Brand Style CSS
   Gacrux Advanced Technologies in Medicine
   ============================================ */

/* ===== CSS CUSTOM PROPERTIES ===== */
:root {
  /* Primary Colors */
  --color-coral: #D4887A;
  --color-coral-light: #E5A99A;
  --color-coral-dark: #C07668;

  /* Navy (Brand) */
  --color-navy: #2B4C7E;
  --color-navy-dark: #1A365D;
  --color-navy-light: #3D6098;

  /* Backgrounds */
  --color-bg-warm: #FAF8F5;
  --color-bg-white: #FFFFFF;

  /* Accent */
  --color-cyan: #4DD4E0;
  --color-success: #68A67D;
  --color-warning: #E5A84D;

  /* Text */
  --color-text-dark: #1A365D;
  --color-text-body: #374151;
  --color-text-muted: #6B7280;
  --color-text-light: #FFFFFF;

  /* Typography */
  --font-heading: 'Playfair Display', 'Georgia', 'Times New Roman', serif;
  --font-body: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;

  /* 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;
  --space-4xl: 6rem;

  /* Borders */
  --radius-sm: 2px;
  --radius-md: 4px;
  --radius-lg: 6px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(26, 54, 93, 0.05);
  --shadow-md: 0 4px 6px rgba(26, 54, 93, 0.07);
  --shadow-lg: 0 10px 15px rgba(26, 54, 93, 0.1);

  /* Transitions */
  --transition-fast: 0.15s ease;
  --transition-base: 0.2s ease;

  /* Layout */
  --container-max: 1200px;
  --container-narrow: 800px;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-body);
  font-size: 1rem;
  font-weight: 400;
  line-height: 1.7;
  color: var(--color-text-body);
  background-color: var(--color-bg-white);
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul, ol {
  list-style: none;
}

/* ===== TYPOGRAPHY ===== */
h1, h2, h3 {
  font-family: var(--font-heading);
  color: var(--color-text-dark);
  font-weight: 600;
}

h1 {
  font-size: 3rem;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h2 {
  font-size: 2rem;
  line-height: 1.3;
  letter-spacing: -0.01em;
}

h3 {
  font-size: 1.5rem;
  font-weight: 500;
  line-height: 1.4;
}

h4 {
  font-family: var(--font-body);
  font-size: 1.125rem;
  font-weight: 600;
  line-height: 1.4;
  color: var(--color-navy);
}

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

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

.text-small {
  font-size: 0.875rem;
  line-height: 1.5;
  color: var(--color-text-muted);
}

.text-large {
  font-size: 1.125rem;
}

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

.container--narrow {
  max-width: var(--container-narrow);
}

/* ===== SECTIONS ===== */
.section {
  padding: var(--space-4xl) 0;
}

.section--coral {
  background-color: var(--color-coral);
  color: var(--color-text-light);
}

.section--coral h1,
.section--coral h2,
.section--coral h3 {
  color: var(--color-text-light);
}

.section--light {
  background-color: var(--color-bg-warm);
}

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

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

.section--navy h1,
.section--navy h2,
.section--navy h3 {
  color: var(--color-text-light);
}

/* ===== HEADER ===== */
.header {
  background-color: var(--color-coral);
  padding: var(--space-md) 0;
  position: sticky;
  top: 0;
  z-index: 100;
}

.header__inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-xl);
}

.header__logo img {
  height: 48px;
  width: auto;
}

.nav {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav__list {
  display: flex;
  align-items: center;
  gap: var(--space-lg);
}

.nav__link {
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-light);
  padding: var(--space-sm) 0;
  border-bottom: 2px solid transparent;
  transition: border-color var(--transition-base);
}

.nav__link:hover,
.nav__link--active {
  border-bottom-color: rgba(255, 255, 255, 0.6);
}

.nav__link--cta {
  padding: 0.625rem 1.25rem;
  border: 2px solid var(--color-text-light);
  border-radius: var(--radius-md);
  transition: background-color var(--transition-base), color var(--transition-base);
}

.nav__link--cta:hover {
  background-color: var(--color-text-light);
  color: var(--color-coral);
}

/* Mobile Navigation */
.nav__toggle {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-sm);
}

.nav__toggle-bar {
  display: block;
  width: 24px;
  height: 2px;
  background-color: var(--color-text-light);
  margin: 5px 0;
  transition: transform var(--transition-base);
}

@media (max-width: 768px) {
  .nav__toggle {
    display: block;
  }

  .nav__list {
    position: fixed;
    top: 72px;
    left: 0;
    right: 0;
    background-color: var(--color-coral);
    flex-direction: column;
    padding: var(--space-xl);
    gap: var(--space-md);
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition-base), opacity var(--transition-base), visibility var(--transition-base);
  }

  .nav__list.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav__link {
    font-size: 1.125rem;
    padding: var(--space-sm) 0;
  }
}

/* ===== HERO ===== */
.hero {
  background-color: var(--color-coral);
  color: var(--color-text-light);
  padding: var(--space-4xl) 0;
  text-align: center;
}

.hero h1 {
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
}

.hero__tagline {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 400;
  opacity: 0.95;
  margin-bottom: var(--space-2xl);
}

.hero__description {
  font-size: 1.125rem;
  max-width: 640px;
  margin: 0 auto var(--space-2xl);
  opacity: 0.9;
  line-height: 1.8;
}

.hero__actions {
  display: flex;
  gap: var(--space-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-block;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 500;
  letter-spacing: 0.01em;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  text-align: center;
  transition: background-color var(--transition-base), color var(--transition-base), transform var(--transition-fast);
}

.btn:active {
  transform: translateY(1px);
}

.btn--primary {
  background-color: var(--color-navy);
  color: var(--color-text-light);
}

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

.btn--outline {
  background-color: transparent;
  color: var(--color-text-light);
  border: 2px solid var(--color-text-light);
  padding: calc(0.75rem - 2px) calc(1.5rem - 2px);
}

.btn--outline:hover {
  background-color: var(--color-text-light);
  color: var(--color-coral);
}

.btn--outline-navy {
  background-color: transparent;
  color: var(--color-navy);
  border: 2px solid var(--color-navy);
  padding: calc(0.75rem - 2px) calc(1.5rem - 2px);
}

.btn--outline-navy:hover {
  background-color: var(--color-navy);
  color: var(--color-text-light);
}

/* ===== CARDS ===== */
.card {
  background-color: var(--color-bg-white);
  border: 1px solid rgba(26, 54, 93, 0.1);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  transition: box-shadow var(--transition-base), transform var(--transition-base);
}

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

.card__icon {
  width: 48px;
  height: 48px;
  margin-bottom: var(--space-md);
}

/* Card icon with dark background for logos with white elements */
.card__icon--dark-bg {
  background-color: var(--color-navy-dark);
  padding: var(--space-sm);
  border-radius: var(--radius-md);
}

.card__title {
  font-family: var(--font-body);
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--color-navy);
  margin-bottom: var(--space-sm);
}

.card__description {
  font-size: 0.9375rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.card__link {
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--color-navy);
  text-decoration: none;
  display: inline-flex;
  align-items: center;
  gap: var(--space-xs);
}

.card__link:hover {
  text-decoration: underline;
}

/* ===== GRID LAYOUTS ===== */
.grid {
  display: grid;
  gap: var(--space-xl);
}

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

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

@media (max-width: 992px) {
  .grid--3 {
    grid-template-columns: repeat(2, 1fr);
  }
}

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

/* Two-Column Layout (Label/Content) */
.two-col {
  display: grid;
  grid-template-columns: 200px 1fr;
  gap: var(--space-2xl);
  align-items: start;
}

.two-col__label {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 500;
}

.two-col__content {
  font-size: 1rem;
  line-height: 1.8;
}

@media (max-width: 768px) {
  .two-col {
    grid-template-columns: 1fr;
    gap: var(--space-md);
  }
}

/* ===== PRODUCT FEATURE SECTIONS ===== */
.feature {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
  align-items: center;
}

.feature--reverse {
  direction: rtl;
}

.feature--reverse > * {
  direction: ltr;
}

.feature__content h2 {
  margin-bottom: var(--space-md);
}

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

.feature__image {
  display: flex;
  justify-content: center;
  align-items: center;
}

.feature__image img {
  max-width: 280px;
}

@media (max-width: 768px) {
  .feature,
  .feature--reverse {
    grid-template-columns: 1fr;
    direction: ltr;
  }

  .feature__image {
    order: -1;
  }
}

/* ===== WHITEPAPER LIST ===== */
.whitepaper-item {
  background-color: var(--color-bg-white);
  border: 1px solid rgba(26, 54, 93, 0.1);
  border-radius: var(--radius-md);
  padding: var(--space-xl);
  margin-bottom: var(--space-lg);
  transition: box-shadow var(--transition-base);
}

.whitepaper-item:hover {
  box-shadow: var(--shadow-md);
}

.whitepaper-item:last-child {
  margin-bottom: 0;
}

.whitepaper-item__title {
  font-family: var(--font-heading);
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--color-navy);
  margin-bottom: var(--space-sm);
}

.whitepaper-item__date {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  margin-bottom: var(--space-md);
}

.whitepaper-item__summary {
  font-size: 0.9375rem;
  color: var(--color-text-body);
  margin-bottom: var(--space-lg);
  line-height: 1.7;
}

.whitepaper-item__link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-navy);
}

.whitepaper-item__link:hover {
  text-decoration: underline;
}

/* ===== PAGE HEADER ===== */
.page-header {
  background-color: var(--color-coral);
  color: var(--color-text-light);
  padding: var(--space-3xl) 0;
  text-align: center;
}

.page-header h1 {
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
}

.page-header__subtitle {
  font-size: 1.125rem;
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto;
}

/* ===== PRODUCT PAGE STYLES ===== */
.product-intro {
  display: flex;
  gap: var(--space-3xl);
  align-items: center;
}

.product-intro__logo {
  flex-shrink: 0;
}

.product-intro__logo img {
  max-width: 200px;
  max-height: 200px;
}

/* GacruxAI logo background - logo has white elements that need contrast */
.product-intro__logo--dark-bg {
  background-color: var(--color-navy-dark);
  padding: var(--space-lg);
  border-radius: var(--radius-md);
}

.product-intro__content h2 {
  margin-bottom: var(--space-md);
}

@media (max-width: 768px) {
  .product-intro {
    flex-direction: column;
    text-align: center;
  }
}

/* Feature List */
.feature-list {
  list-style: none;
  padding: 0;
  margin: 0;
}

.feature-list li {
  position: relative;
  padding-left: var(--space-lg);
  margin-bottom: var(--space-md);
}

.feature-list li::before {
  content: "";
  position: absolute;
  left: 0;
  top: 0.5em;
  width: 8px;
  height: 8px;
  background-color: var(--color-coral);
  border-radius: 1px;
}

/* ===== CONTACT FORM ===== */
.contact-section {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-3xl);
}

@media (max-width: 768px) {
  .contact-section {
    grid-template-columns: 1fr;
  }
}

.contact-info h2 {
  margin-bottom: var(--space-lg);
}

.contact-info p {
  margin-bottom: var(--space-md);
}

.contact-info__email {
  display: flex;
  align-items: center;
  gap: var(--space-sm);
  font-size: 1.125rem;
  font-weight: 500;
  color: var(--color-navy);
  margin-top: var(--space-xl);
}

.contact-info__email a {
  color: var(--color-navy);
  text-decoration: underline;
}

.contact-form h2 {
  margin-bottom: var(--space-lg);
}

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

.form-group label {
  display: block;
  font-size: 0.9375rem;
  font-weight: 500;
  color: var(--color-text-dark);
  margin-bottom: var(--space-sm);
}

.form-group input,
.form-group textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: 1rem;
  padding: 0.75rem 1rem;
  border: 1px solid rgba(26, 54, 93, 0.2);
  border-radius: var(--radius-md);
  background-color: var(--color-bg-white);
  transition: border-color var(--transition-base), box-shadow var(--transition-base);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-navy);
  box-shadow: 0 0 0 3px rgba(43, 76, 126, 0.1);
}

.form-group textarea {
  min-height: 150px;
  resize: vertical;
}

/* ===== FOOTER ===== */
.footer {
  background-color: var(--color-navy-dark);
  color: var(--color-text-light);
  padding: var(--space-3xl) 0 var(--space-xl);
}

.footer__inner {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  gap: var(--space-2xl);
  margin-bottom: var(--space-2xl);
}

.footer__brand {
  max-width: 300px;
}

.footer__logo {
  height: 40px;
  width: auto;
  margin-bottom: var(--space-md);
}

.footer__tagline {
  font-size: 0.9375rem;
  opacity: 0.8;
  line-height: 1.6;
}

.footer__nav {
  display: flex;
  gap: var(--space-3xl);
}

.footer__nav-group h4 {
  font-family: var(--font-body);
  font-size: 0.875rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--color-text-light);
  margin-bottom: var(--space-md);
  opacity: 0.7;
}

.footer__nav-group ul {
  list-style: none;
}

.footer__nav-group li {
  margin-bottom: var(--space-sm);
}

.footer__nav-group a {
  font-size: 0.9375rem;
  color: var(--color-text-light);
  opacity: 0.8;
  transition: opacity var(--transition-base);
}

.footer__nav-group a:hover {
  opacity: 1;
}

.footer__bottom {
  padding-top: var(--space-xl);
  border-top: 1px solid rgba(255, 255, 255, 0.1);
  text-align: center;
}

.footer__copyright {
  font-size: 0.875rem;
  opacity: 0.6;
}

@media (max-width: 768px) {
  .footer__inner {
    flex-direction: column;
  }

  .footer__nav {
    flex-direction: column;
    gap: var(--space-xl);
  }
}

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

.section--coral :focus-visible,
.header :focus-visible,
.footer :focus-visible {
  outline-color: var(--color-text-light);
}

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

.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); }
.mb-2xl { margin-bottom: var(--space-2xl); }

.mt-lg { margin-top: var(--space-lg); }
.mt-xl { margin-top: var(--space-xl); }
.mt-2xl { margin-top: var(--space-2xl); }

/* Section Title */
.section-title {
  margin-bottom: var(--space-2xl);
}

.section-title--center {
  text-align: center;
}

.section-subtitle {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-top: var(--space-sm);
}

/* Divider */
.divider {
  width: 60px;
  height: 3px;
  background-color: var(--color-coral);
  margin: var(--space-xl) 0;
}

.divider--center {
  margin-left: auto;
  margin-right: auto;
}

.divider--light {
  background-color: rgba(255, 255, 255, 0.4);
}

/* Responsive Typography */
@media (max-width: 768px) {
  h1 {
    font-size: 2.25rem;
  }

  h2 {
    font-size: 1.75rem;
  }

  h3 {
    font-size: 1.25rem;
  }

  .hero__tagline {
    font-size: 1.25rem;
  }

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