/* ===========================================
   DIAGNOXAL - Clinical Diagnostic UI
   Design System & Global Styles
   =========================================== */

/* Google Fonts - Inter */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

/* ===== CSS VARIABLES (Design Tokens) ===== */
:root {
  /* Primary Colors - Professional Navy Blue Palette (psychiatry.org inspired) */
  --color-bg: #F8F9FA;
  --color-bg-alt: #FFFFFF;
  --color-heading: #1B365D;
  --color-accent: #2C5282;
  --color-accent-hover: #1E3A5F;

  /* Input Colors */
  --color-input-bg: #FFFFFF;
  --color-input-border: #CBD5E0;
  --color-input-focus: #1B365D;

  /* Text Colors */
  --color-text: #2D3748;
  --color-text-light: #4A5568;
  --color-text-muted: #718096;

  /* Status Colors */
  --color-success: #38A169;
  --color-warning: #D69E2E;
  --color-error: #E53E3E;

  /* Accent - Orange for CTAs (like psychiatry.org RENEW/JOIN buttons) */
  --color-cta: #C65D21;
  --color-cta-hover: #A74D1A;

  /* Neutral */
  --color-white: #FFFFFF;
  --color-border: #E2E8F0;

  /* Glassmorphism - adjusted for navy */
  --glass-bg: rgba(255, 255, 255, 0.85);
  --glass-border: rgba(27, 54, 93, 0.1);
  --glass-shadow: 0 8px 32px rgba(27, 54, 93, 0.15);

  /* Typography */
  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --font-size-base: 16px;
  --font-size-sm: 14px;
  --font-size-lg: 18px;
  --font-size-xl: 24px;
  --font-size-2xl: 32px;
  --font-size-3xl: 48px;

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-2xl: 48px;
  --spacing-3xl: 64px;

  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 20px;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
  --shadow-glow: 0 0 30px rgba(27, 54, 93, 0.15);

  /* Transitions */
  --transition-fast: 150ms ease;
  --transition-normal: 250ms ease;
  --transition-smooth: 400ms cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
  font-size: var(--font-size-base);
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
}

/* ===== TYPOGRAPHY ===== */
h1,
h2,
h3,
h4,
h5,
h6 {
  color: var(--color-heading);
  font-weight: 600;
  line-height: 1.3;
  margin-bottom: var(--spacing-md);
}

h1 {
  font-size: var(--font-size-3xl);
}

h2 {
  font-size: var(--font-size-2xl);
}

h3 {
  font-size: var(--font-size-xl);
}

h4 {
  font-size: var(--font-size-lg);
}

p {
  margin-bottom: var(--spacing-md);
}

a {
  color: var(--color-heading);
  text-decoration: none;
  transition: color var(--transition-fast);
}

a:hover {
  color: var(--color-accent);
}

/* ===== LAYOUT ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

.container-sm {
  max-width: 600px;
  margin: 0 auto;
  padding: 0 var(--spacing-lg);
}

/* ===== HEADER / NAVIGATION ===== */
.header {
  background-color: var(--color-heading);
  padding: var(--spacing-md) 0;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-md);
}

.header .container {
  display: flex;
  justify-content: space-between;
  align-items: center;
}

.logo {
  color: var(--color-white);
  font-size: var(--font-size-xl);
  font-weight: 700;
  text-decoration: none;
}

.logo:hover {
  color: var(--color-white);
  opacity: 0.9;
}

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

.nav a {
  color: var(--color-white);
  font-weight: 500;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--radius-sm);
  transition: background-color var(--transition-fast);
}

.nav a:hover {
  background-color: rgba(255, 255, 255, 0.15);
  color: var(--color-white);
}

/* ===== BUTTONS ===== */
.btn {
  display: inline-block;
  padding: var(--spacing-sm) var(--spacing-lg);
  font-size: var(--font-size-base);
  font-weight: 600;
  text-align: center;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition-smooth);
  text-decoration: none;
  position: relative;
  overflow: hidden;
}

.btn::after {
  content: '';
  position: absolute;
  top: 50%;
  left: 50%;
  width: 0;
  height: 0;
  background: rgba(255, 255, 255, 0.2);
  border-radius: 50%;
  transform: translate(-50%, -50%);
  transition: width 0.4s ease, height 0.4s ease;
}

.btn:active::after {
  width: 200px;
  height: 200px;
}

.btn-primary {
  background-color: var(--color-heading);
  color: var(--color-white);
  box-shadow: 0 4px 15px rgba(27, 54, 93, 0.3);
}

.btn-primary:hover {
  background-color: var(--color-accent);
  color: var(--color-white);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(27, 54, 93, 0.4);
}

.btn-secondary {
  background-color: transparent;
  color: var(--color-heading);
  border: 2px solid var(--color-heading);
}

.btn-secondary:hover {
  background-color: var(--color-heading);
  color: var(--color-white);
  transform: translateY(-2px);
}

.btn-large {
  padding: var(--spacing-md) var(--spacing-xl);
  font-size: var(--font-size-lg);
}

.btn:disabled {
  opacity: 0.6;
  cursor: not-allowed;
  transform: none;
}

/* ===== FORMS ===== */
.form-group {
  margin-bottom: var(--spacing-lg);
}

.form-label {
  display: block;
  margin-bottom: var(--spacing-sm);
  font-weight: 500;
  color: var(--color-text);
}

.form-input {
  width: 100%;
  padding: var(--spacing-md);
  font-size: var(--font-size-base);
  font-family: inherit;
  background-color: var(--color-input-bg);
  border: 2px solid var(--color-input-border);
  border-radius: var(--radius-md);
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus {
  outline: none;
  border-color: var(--color-input-focus);
  box-shadow: 0 0 0 3px rgba(230, 126, 34, 0.2);
}

.form-input::placeholder {
  color: var(--color-text-muted);
}

textarea.form-input {
  min-height: 200px;
  resize: vertical;
}

.form-error {
  color: var(--color-error);
  font-size: var(--font-size-sm);
  margin-top: var(--spacing-xs);
}

/* ===== CARDS ===== */
.card {
  background: var(--glass-bg);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border-radius: var(--radius-lg);
  padding: var(--spacing-xl);
  box-shadow: var(--glass-shadow);
  border: 1px solid var(--glass-border);
  transition: transform var(--transition-smooth), box-shadow var(--transition-smooth);
}

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

.card-header {
  margin-bottom: var(--spacing-lg);
  padding-bottom: var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
}

/* ===== HERO SECTION ===== */
.hero {
  padding: var(--spacing-3xl) 0;
  text-align: center;
  background: linear-gradient(135deg, var(--color-bg) 0%, #EDF2F7 50%, var(--color-bg-alt) 100%);
  background-size: 200% 200%;
  animation: gradientShift 8s ease infinite;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url("data:image/svg+xml,%3Csvg width='60' height='60' viewBox='0 0 60 60' xmlns='http://www.w3.org/2000/svg'%3E%3Cg fill='none' fill-rule='evenodd'%3E%3Cg fill='%231B365D' fill-opacity='0.03'%3E%3Cpath d='M36 34v-4h-2v4h-4v2h4v4h2v-4h4v-2h-4zm0-30V0h-2v4h-4v2h4v4h2V6h4V4h-4zM6 34v-4H4v4H0v2h4v4h2v-4h4v-2H6zM6 4V0H4v4H0v2h4v4h2V6h4V4H6z'/%3E%3C/g%3E%3C/g%3E%3C/svg%3E");
  pointer-events: none;
}

@keyframes gradientShift {
  0% {
    background-position: 0% 50%;
  }

  50% {
    background-position: 100% 50%;
  }

  100% {
    background-position: 0% 50%;
  }
}

.hero h1 {
  margin-bottom: var(--spacing-md);
  position: relative;
}

.hero .subtitle {
  font-size: var(--font-size-lg);
  color: var(--color-text-light);
  margin-bottom: var(--spacing-xl);
}

.hero .btn-group {
  display: flex;
  gap: var(--spacing-md);
  justify-content: center;
  flex-wrap: wrap;
}

/* ===== FEATURES SECTION ===== */
.features {
  padding: var(--spacing-3xl) 0;
  background-color: var(--color-bg-alt);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: var(--spacing-xl);
}

.feature-card {
  background: var(--glass-bg);
  backdrop-filter: blur(8px);
  -webkit-backdrop-filter: blur(8px);
  padding: var(--spacing-xl);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  text-align: center;
  border: 1px solid var(--glass-border);
  transition: all var(--transition-smooth);
}

.feature-card:hover {
  transform: translateY(-5px);
  box-shadow: var(--shadow-glow);
  border-color: var(--color-heading);
}

.feature-card h3 {
  margin-bottom: var(--spacing-sm);
}

.feature-card p {
  color: var(--color-text-light);
  margin-bottom: 0;
}

/* ===== AUTH PAGES ===== */
.auth-page {
  min-height: calc(100vh - 70px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: var(--spacing-xl) 0;
}

.auth-card {
  width: 100%;
  max-width: 440px;
}

.auth-card h2 {
  text-align: center;
  margin-bottom: var(--spacing-xl);
}

.auth-links {
  text-align: center;
  margin-top: var(--spacing-lg);
  color: var(--color-text-light);
}

/* ===== DASHBOARD ===== */
.dashboard {
  padding: var(--spacing-xl) 0;
}

.stats-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
  gap: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.stat-card {
  background-color: var(--color-white);
  padding: var(--spacing-lg);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-sm);
  text-align: center;
}

.stat-value {
  font-size: var(--font-size-2xl);
  font-weight: 700;
  color: var(--color-heading);
}

.stat-label {
  color: var(--color-text-light);
  font-size: var(--font-size-sm);
}

/* ===== DIAGNOSTIC PAGE ===== */
.diagnose-page {
  padding: var(--spacing-xl) 0;
}

.instructions-box {
  background-color: var(--color-bg-alt);
  border-left: 4px solid var(--color-heading);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
}

.instructions-box h4 {
  margin-bottom: var(--spacing-sm);
}

.instructions-box p {
  margin-bottom: 0;
  color: var(--color-text-light);
}

.results-section {
  margin-top: var(--spacing-xl);
}

/* ===== GUIDANCE DROPDOWNS ===== */
.guidance-section {
  margin-bottom: var(--spacing-xl);
}

.guidance-dropdown {
  background: var(--color-bg-alt);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-sm);
  overflow: hidden;
  border: 1px solid var(--color-border);
}

.guidance-dropdown summary {
  padding: var(--spacing-md);
  cursor: pointer;
  font-weight: 500;
  color: var(--color-heading);
  transition: background var(--transition-fast);
  list-style: none;
}

.guidance-dropdown summary::-webkit-details-marker {
  display: none;
}

.guidance-dropdown summary::before {
  content: '▸ ';
}

.guidance-dropdown[open] summary::before {
  content: '▾ ';
}

.guidance-dropdown summary:hover {
  background: rgba(27, 54, 93, 0.08);
}

.guidance-content {
  padding: var(--spacing-md) var(--spacing-lg);
  border-top: 1px solid var(--color-border);
  background: var(--color-white);
}

.guidance-content h5 {
  color: var(--color-accent);
  margin: var(--spacing-md) 0 var(--spacing-xs);
  font-size: var(--font-size-base);
}

.guidance-content h5:first-of-type {
  margin-top: 0;
}

.guidance-content p {
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-light);
}

.example-vignette {
  font-size: var(--font-size-sm);
  line-height: 1.7;
  max-height: 300px;
  overflow-y: auto;
}

/* ===== ALERTS ===== */
.alert {
  padding: var(--spacing-md);
  border-radius: var(--radius-md);
  margin-bottom: var(--spacing-lg);
}

.alert-success {
  background-color: #D5F5E3;
  color: #1E8449;
  border: 1px solid #27AE60;
}

.alert-error {
  background-color: #FADBD8;
  color: #B03A2E;
  border: 1px solid #E74C3C;
}

.alert-warning {
  background-color: #FCF3CF;
  color: #9A7D0A;
  border: 1px solid #F39C12;
}

/* ===== FOOTER ===== */
.footer {
  background-color: var(--color-text);
  color: var(--color-white);
  padding: var(--spacing-xl) 0;
  margin-top: var(--spacing-3xl);
}

.footer a {
  color: rgba(255, 255, 255, 0.8);
}

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

.footer-content {
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: var(--spacing-lg);
}

.footer-links {
  display: flex;
  gap: var(--spacing-lg);
}

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

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

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}

.hidden {
  display: none;
}

/* ===== LOADING SPINNER ===== */
.spinner {
  width: 50px;
  height: 50px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-heading);
  border-right-color: var(--color-accent);
  border-radius: 50%;
  animation: spin 0.8s cubic-bezier(0.5, 0, 0.5, 1) infinite;
  margin: var(--spacing-xl) auto;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* ===== AI BADGE ===== */
.ai-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: linear-gradient(135deg, var(--color-heading) 0%, var(--color-accent) 100%);
  color: var(--color-white);
  padding: 8px 16px;
  border-radius: 20px;
  font-size: var(--font-size-sm);
  font-weight: 600;
  margin-bottom: var(--spacing-lg);
  box-shadow: 0 4px 15px rgba(230, 126, 34, 0.3);
}

.ai-badge::before {
  content: '';
  width: 8px;
  height: 8px;
  background: #2ECC71;
  border-radius: 50%;
  animation: pulse 2s ease-in-out infinite;
}

@keyframes pulse {

  0%,
  100% {
    opacity: 1;
    transform: scale(1);
  }

  50% {
    opacity: 0.6;
    transform: scale(1.2);
  }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .header .container {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .nav {
    flex-wrap: wrap;
    justify-content: center;
  }

  h1 {
    font-size: var(--font-size-2xl);
  }

  h2 {
    font-size: var(--font-size-xl);
  }

  .hero {
    padding: var(--spacing-xl) 0;
  }

  .hero::before {
    display: none;
  }

  .footer-content {
    flex-direction: column;
    text-align: center;
  }

  .footer-links {
    justify-content: center;
  }

  .btn:hover {
    transform: none;
  }

  .card:hover,
  .feature-card:hover {
    transform: none;
  }
}