/* ============================================
   DESIGN SYSTEM - Phase 1
   Light Purple + Soft Gray | Spectral + Lato
   ============================================ */

:root {
  /* Primary Colors */
  --purple-50: #faf8ff;
  --purple-100: #f3eeff;
  --purple-200: #e8deff;
  --purple-300: #d4c4f5;
  --purple-400: #b9a3e8;
  --purple-500: #9b8acb;
  --purple-600: #7b6ba8;
  --purple-700: #5d4f85;

  /* Neutrals */
  --gray-50: #fafafa;
  --gray-100: #f5f5f5;
  --gray-200: #eeeeee;
  --gray-300: #e0e0e0;
  --gray-400: #bdbdbd;
  --gray-500: #8e8e8e;
  --gray-600: #757575;
  --gray-700: #616161;
  --gray-800: #424242;
  --gray-900: #212121;

  /* Semantic */
  --white: #ffffff;
  --black: #1a1a1a;
  --background: var(--white);
  --text-primary: var(--gray-900);
  --text-secondary: var(--gray-500);
  --accent: var(--purple-500);
  --accent-light: var(--purple-100);

  /* Typography Scale */
  --font-serif: 'Spectral', Georgia, serif;
  --font-sans: 'Lato', -apple-system, BlinkMacSystemFont, sans-serif;

  /* Spacing (8px base) */
  --space-1: 0.5rem;
  --space-2: 1rem;
  --space-3: 1.5rem;
  --space-4: 2rem;
  --space-6: 3rem;
  --space-8: 4rem;
  --space-12: 6rem;
  --space-16: 8rem;
  --space-24: 12rem;

  /* Transitions */
  --ease-out: cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: 0.2s var(--ease-out);
  --transition-medium: 0.4s var(--ease-out);
}

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

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

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

body {
  font-family: var(--font-sans);
  background: var(--background);
  color: var(--text-primary);
  line-height: 1.7;
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

h1,
h2,
h3 {
  font-family: var(--font-serif);
  font-weight: 400;
  line-height: 1.2;
  letter-spacing: -0.02em;
}

h1 {
  font-size: clamp(2.5rem, 5vw, 4rem);
  font-weight: 300;
}

h2 {
  font-size: clamp(2rem, 4vw, 2.5rem);
}

h3 {
  font-size: 1.5rem;
  font-weight: 400;
}

p {
  font-size: 1.125rem;
  color: var(--text-secondary);
  max-width: 60ch;
}

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

.nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 1000;
  padding: var(--space-4) var(--space-4);
  transition:
    padding 0.3s ease,
    background 0.3s ease,
    backdrop-filter 0.3s ease;
}

.nav.scrolled {
  padding: var(--space-2) var(--space-4);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--gray-100);
}

.nav-inner {
  max-width: 1400px;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.nav-logo {
  font-family: var(--font-serif);
  font-size: 1.5rem;
  font-weight: 500;
  color: var(--text-primary);
  text-decoration: none;
  transition: var(--transition-fast);
}

.nav-logo:hover {
  color: var(--accent);
}

.nav-logo span {
  color: var(--accent);
}

.nav-links {
  display: flex;
  gap: var(--space-6);
  list-style: none;
}

.nav-links a {
  font-size: 0.875rem;
  font-weight: 400;
  color: var(--text-secondary);
  text-decoration: none;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  transition: var(--transition-fast);
}

.nav-links a:hover,
.nav-links a.active {
  color: var(--accent);
}

.nav-cta {
  padding: var(--space-1) var(--space-3);
  background: var(--accent);
  color: var(--white) !important;
  border-radius: 100px;
}

.nav-cta:hover {
  background: var(--purple-600) !important;
}

.lang-toggle {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-size: 0.875rem;
  margin-left: var(--space-4);
}

.lang-toggle button {
  background: none;
  border: none;
  font-family: var(--font-sans);
  font-size: 0.875rem;
  color: var(--text-secondary);
  cursor: pointer;
  padding: 0.25rem 0.5rem;
  transition: var(--transition-fast);
}

.lang-toggle button:hover {
  color: var(--accent);
}

.lang-toggle button.active {
  color: var(--accent);
  font-weight: 600;
}

.lang-toggle .separator {
  color: var(--gray-300);
}

/* ============================================
     MOBILE MENU
     ============================================ */

.hamburger {
  display: none;
  flex-direction: column;
  gap: 6px;
  background: none;
  border: none;
  cursor: pointer;
  padding: var(--space-1);
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--text-primary);
  transition: var(--transition-fast);
}

.mobile-menu {
  display: none;
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: var(--white);
  z-index: 999;
  padding: var(--space-16) var(--space-4);
  flex-direction: column;
  gap: var(--space-4);
}

.mobile-menu.active {
  display: flex;
}

.mobile-menu a {
  font-family: var(--font-serif);
  font-size: 2rem;
  color: var(--text-primary);
  text-decoration: none;
  transition: var(--transition-fast);
}

.mobile-menu a:hover,
.mobile-menu a.active {
  color: var(--accent);
}

.mobile-lang-toggle {
  display: flex;
  align-items: center;
  gap: 1rem;
  margin-top: var(--space-6);
  padding-top: var(--space-4);
  border-top: 1px solid var(--gray-100);
}

.mobile-lang-toggle button {
  background: none;
  border: none;
  font-family: var(--font-serif);
  font-size: 1.5rem;
  color: var(--text-secondary);
  cursor: pointer;
}

.mobile-lang-toggle button:hover,
.mobile-lang-toggle button.active {
  color: var(--accent);
}

body.menu-open {
  overflow: hidden;
}

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

/* Footer will likely need to be customized per page if structurally different,
   but basic styles can go here if identical */
.footer {
  padding: var(--space-16) var(--space-4) var(--space-8);
  background: var(--gray-50);
  margin-top: var(--space-24);
}

.footer-content {
  max-width: 1400px;
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-12);
}

.footer-brand h2 {
  margin-bottom: var(--space-2);
}

.footer-brand p {
  color: var(--accent);
  font-size: 1.25rem;
}

.footer-info {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-8);
}

.info-item h3 {
  font-size: 1rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-4);
  color: var(--text-secondary);
}

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

.footer-bottom {
  max-width: 1400px;
  margin: 0 auto;
  padding-top: var(--space-8);
  border-top: 1px solid var(--gray-200);
  display: flex;
  justify-content: space-between;
  color: var(--text-secondary);
  font-size: 0.875rem;
}

/* ============================================
     DOCTOR PAGE SPECIFIC (Common)
     ============================================ */
.doctor-profile {
  padding: calc(var(--space-16) + 60px) var(--space-4) var(--space-12);
  max-width: 1000px;
  margin: 0 auto;
}

.back-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  font-size: 0.875rem;
  color: var(--text-secondary);
  text-decoration: none;
  margin-bottom: var(--space-6);
  transition: var(--transition-fast);
}

.back-link:hover {
  color: var(--accent);
}

.back-link svg {
  width: 16px;
  height: 16px;
}

.profile-header {
  display: grid;
  grid-template-columns: 300px 1fr;
  gap: var(--space-8);
  margin-bottom: var(--space-8);
}

.profile-image {
  width: 100%;
  aspect-ratio: 1;
  border-radius: 20px;
  overflow: hidden;
  box-shadow: 0 8px 40px rgba(155, 138, 203, 0.2);
}

.profile-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.profile-info {
  display: flex;
  flex-direction: column;
  justify-content: center;
}

.profile-title {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--accent);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: var(--space-1);
}

.profile-info h1 {
  margin-bottom: var(--space-3);
}

.profile-info > p {
  margin-bottom: var(--space-4);
  max-width: 500px;
}

.credentials-list {
  list-style: none;
  margin-bottom: var(--space-4);
}

.credentials-list li {
  display: flex;
  align-items: flex-start;
  gap: var(--space-2);
  padding: var(--space-2) 0;
  border-bottom: 1px solid var(--gray-100);
  font-size: 1rem;
  color: var(--text-secondary);
}

.credentials-list li:last-child {
  border-bottom: none;
}

.credentials-list svg {
  width: 20px;
  height: 20px;
  color: var(--accent);
  flex-shrink: 0;
  margin-top: 2px;
}

.profile-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
  padding: var(--space-2) var(--space-4);
  background: var(--accent);
  color: var(--white);
  font-family: var(--font-sans);
  font-size: 1rem;
  font-weight: 600;
  text-decoration: none;
  border-radius: 10px;
  transition: var(--transition-fast);
  box-shadow: 0 4px 20px rgba(155, 138, 203, 0.3);
}

.profile-cta:hover {
  background: var(--purple-600);
  transform: translateY(-3px);
  box-shadow: 0 8px 30px rgba(155, 138, 203, 0.4);
}

.specializations {
  background: var(--gray-50);
  border-radius: 16px;
  padding: var(--space-6);
  margin-bottom: var(--space-8);
}

.specializations h2 {
  margin-bottom: var(--space-4);
}

.spec-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--space-3);
}

.spec-item {
  background: var(--white);
  padding: var(--space-3);
  border-radius: 12px;
  text-align: center;
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.04);
}

.spec-item svg {
  width: 40px;
  height: 40px;
  color: var(--accent);
  margin-bottom: var(--space-2);
}

.spec-item h3 {
  font-size: 1rem;
  margin-bottom: var(--space-1);
}

.spec-item p {
  font-size: 0.875rem;
}

/* ============================================
     MEDIA QUERIES
     ============================================ */

@media (max-width: 1024px) {
  :root {
    --space-16: 6rem;
  }
}

@media (max-width: 768px) {
  :root {
    --space-16: 4rem;
  }

  .nav {
    padding: var(--space-2);
  }

  .nav-links {
    display: none;
  }

  .hamburger {
    display: flex;
  }

  .lang-toggle {
    display: none;
  }

  .footer-content,
  .footer-info {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }

  .footer-bottom {
    flex-direction: column;
    gap: var(--space-4);
    text-align: center;
  }

  /* Doctor Profile Mobile */
  .profile-header {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .profile-image {
    max-width: 250px;
    margin: 0 auto;
  }

  .profile-info {
    align-items: center;
  }

  .profile-info > p {
    text-align: center;
  }

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

@media (max-width: 480px) {
  .nav-logo {
    font-size: 1.25rem;
  }
  .doctor-profile {
    padding-top: calc(var(--space-8) + 60px);
  }
  .profile-image {
    max-width: 200px;
  }
  .specializations {
    padding: var(--space-4);
  }
}