/* ===== MODERN DESIGN SYSTEM FOR MED.CYCLE ===== */
/* This CSS provides sleek, modern styling while preserving the existing color palette */

:root {
  /* Primary Colors - Preserved */
  --color-primary: #4CAF50;
  --color-primary-dark: #2E7D32;
  --color-primary-light: #45a049;
  --color-error: #dc3545;
  --color-error-dark: #B71C1C;
  --color-error-text: #D27D7D;
  --color-info: #17a2b8;
  --color-success: #8FC49B;
  
  /* Neutral Colors */
  --color-bg: #000000;
  --color-bg-dark: #0a0a0a;
  --color-surface: #1a1a1a;
  --color-surface-light: #242424;
  --color-text: #ffffff;
  --color-text-secondary: #e0e0e0;
  --color-text-tertiary: #b0b0b0;
  --color-text-muted: #808080;
  --color-secondary: #9FB1C1;
  --color-border: #333333;
  --color-border-light: #444444;
  
  /* Spacing Scale (8px base) */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 12px;
  --spacing-lg: 16px;
  --spacing-xl: 24px;
  --spacing-2xl: 32px;
  --spacing-3xl: 48px;
  
  /* Border Radius */
  --radius-sm: 4px;
  --radius-md: 8px;
  --radius-lg: 12px;
  --radius-xl: 16px;
  --radius-2xl: 20px;
  --radius-full: 999px;
  
  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 2px 8px rgba(0, 0, 0, 0.12);
  --shadow-lg: 0 4px 16px rgba(0, 0, 0, 0.18);
  --shadow-xl: 0 8px 32px rgba(0, 0, 0, 0.24);
  --shadow-2xl: 0 12px 48px rgba(0, 0, 0, 0.32);
  
  /* Transitions */
  --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition: 200ms cubic-bezier(0.4, 0, 0.2, 1);
  --transition-slow: 300ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* ===== TYPOGRAPHY IMPROVEMENTS ===== */
body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  line-height: 1.5;
}

h1, h2, h3, h4, h5, h6 {
  line-height: 1.3;
  letter-spacing: -0.02em;
  font-weight: 700;
}

h1 { font-size: 2.5rem; }
h2 { font-size: 2rem; }
h3 { font-size: 1.5rem; }
h4 { font-size: 1.25rem; }
h5 { font-size: 1.1rem; }
h6 { font-size: 1rem; }

/* ===== BUTTONS ===== */
button, .btn, [role="button"] {
  font-family: 'Inter', sans-serif;
  font-weight: 600;
  letter-spacing: 0.3px;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: all var(--transition);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--spacing-sm);
  text-decoration: none;
}

/* Primary Button */
.btn-primary, .cta-button, .tutorial-btn:not(.secondary):not(:disabled) {
  background: linear-gradient(135deg, var(--color-primary), var(--color-primary-light));
  color: white;
  padding: var(--spacing-md) var(--spacing-lg);
  box-shadow: var(--shadow-md);
}

.btn-primary:hover, .cta-button:hover, .tutorial-btn:not(.secondary):hover:not(:disabled) {
  transform: translateY(-2px);
  box-shadow: 0 8px 24px rgba(76, 175, 80, 0.25);
}

.btn-primary:active, .cta-button:active {
  transform: translateY(0);
  box-shadow: var(--shadow-sm);
}

/* Secondary Button */
.btn-secondary, .tutorial-btn.secondary {
  background: rgba(255, 255, 255, 0.1);
  color: var(--color-text);
  padding: var(--spacing-md) var(--spacing-lg);
  border: 1px solid rgba(255, 255, 255, 0.15);
}

.btn-secondary:hover, .tutorial-btn.secondary:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.3);
  transform: translateY(-1px);
}

/* Ghost Button */
.btn-ghost {
  background: transparent;
  color: var(--color-text);
  border: 1px solid rgba(255, 255, 255, 0.2);
  padding: var(--spacing-md) var(--spacing-lg);
}

.btn-ghost:hover {
  background: rgba(255, 255, 255, 0.08);
  border-color: rgba(255, 255, 255, 0.4);
}

/* Minimal Button */
.btn-minimal {
  background: transparent;
  color: var(--color-secondary);
  padding: var(--spacing-xs) var(--spacing-md);
  font-size: 0.9rem;
}

.btn-minimal:hover {
  color: var(--color-text);
  background: rgba(255, 255, 255, 0.05);
}

/* ===== CARDS ===== */
.card, .feature-card, .mini-history-app {
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.06), rgba(255, 255, 255, 0.02));
  border: 1px solid rgba(255, 255, 255, 0.12);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  backdrop-filter: blur(8px);
  transition: all var(--transition-slow);
}

.card:hover, .feature-card:hover {
  transform: translateY(-4px);
  border-color: rgba(159, 177, 193, 0.4);
  background: linear-gradient(135deg, rgba(255, 255, 255, 0.09), rgba(255, 255, 255, 0.04));
  box-shadow: var(--shadow-lg);
}

/* ===== INPUTS & FORMS ===== */
input[type="text"], input[type="email"], input[type="password"], 
input[type="search"], textarea, select {
  background: rgba(255, 255, 255, 0.08);
  border: 1px solid rgba(255, 255, 255, 0.15);
  border-radius: var(--radius-md);
  padding: var(--spacing-sm) var(--spacing-md);
  color: var(--color-text);
  font-family: 'Inter', sans-serif;
  font-size: 0.95rem;
  transition: all var(--transition);
}

input[type="text"]:focus, input[type="email"]:focus, input[type="password"]:focus,
input[type="search"]:focus, textarea:focus, select:focus {
  outline: none;
  border-color: var(--color-secondary);
  background: rgba(255, 255, 255, 0.12);
  box-shadow: 0 0 0 3px rgba(159, 177, 193, 0.1);
}

input::placeholder {
  color: rgba(255, 255, 255, 0.45);
}

/* ===== CHECKBOXES ===== */
input[type="checkbox"] {
  appearance: none;
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-sm);
  background: transparent;
  cursor: pointer;
  transition: all var(--transition);
}

input[type="checkbox"]:hover {
  border-color: rgba(255, 255, 255, 0.6);
  background: rgba(255, 255, 255, 0.05);
}

input[type="checkbox"]:checked {
  background: var(--color-primary);
  border-color: var(--color-primary);
}

input[type="checkbox"]:checked::after {
  content: '✓';
  display: flex;
  align-items: center;
  justify-content: center;
  width: 100%;
  height: 100%;
  color: white;
  font-size: 0.75rem;
  font-weight: bold;
}

/* ===== DROPDOWNS & COLLAPSIBLES ===== */
details summary {
  cursor: pointer;
  user-select: none;
  transition: color var(--transition);
  padding: var(--spacing-md) 0;
}

details summary:hover {
  color: var(--color-secondary);
}

details[open] summary {
  margin-bottom: var(--spacing-lg);
}

.dropdown {
  margin-bottom: var(--spacing-xl);
  border-top: 1px solid var(--color-border);
  padding-top: var(--spacing-lg);
}

.dropdown > summary {
  font-size: 1.3rem;
  font-weight: 700;
  letter-spacing: -0.5px;
}

.dropdown-content {
  margin-top: var(--spacing-md);
  padding-left: var(--spacing-lg);
  border-left: 3px solid var(--color-border);
  font-size: 1.05rem;
  line-height: 1.6;
  color: var(--color-text-secondary);
  transition: all var(--transition);
}

.dropdown-content.correct {
  color: var(--color-success) !important;
  border-left-color: var(--color-success) !important;
}

.dropdown-content.incorrect {
  color: var(--color-error-text) !important;
  border-left-color: var(--color-error-text) !important;
}

/* ===== NAVIGATION ===== */
nav {
  display: flex;
  gap: var(--spacing-3xl);
  flex-wrap: wrap;
  justify-content: center;
}

nav a {
  color: var(--color-text);
  text-decoration: none;
  font-weight: 550;
  letter-spacing: 0.3px;
  position: relative;
  padding-bottom: 4px;
  transition: color var(--transition);
}

nav a:hover {
  color: var(--color-secondary);
}

nav a::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-primary);
  transition: width var(--transition);
}

nav a:hover::after {
  width: 100%;
}

/* ===== BADGES & PILLS ===== */
.badge, .pill {
  display: inline-flex;
  align-items: center;
  gap: var(--spacing-xs);
  padding: var(--spacing-xs) var(--spacing-md);
  border-radius: var(--radius-full);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.4px;
}

.badge-primary {
  background: rgba(76, 175, 80, 0.2);
  color: var(--color-success);
  border: 1px solid rgba(76, 175, 80, 0.4);
}

.badge-secondary {
  background: rgba(159, 177, 193, 0.15);
  color: var(--color-secondary);
  border: 1px solid rgba(159, 177, 193, 0.3);
}

.badge-error {
  background: rgba(220, 53, 69, 0.15);
  color: var(--color-error-text);
  border: 1px solid rgba(220, 53, 69, 0.3);
}

/* ===== MODALS & OVERLAYS ===== */
.modal, .overlay, .filter-menu, .tutorial-modal {
  background: linear-gradient(135deg, rgba(10, 10, 10, 0.95), rgba(20, 20, 20, 0.95));
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-xl);
  backdropfilter: blur(16px);
  box-shadow: var(--shadow-2xl);
}

.tutorial-modal {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 2px rgba(76, 175, 80, 0.2), var(--shadow-2xl);
}

/* ===== FILTER COMPONENTS ===== */
.filter-menu {
  padding: var(--spacing-xl);
  border-radius: var(--radius-2xl);
}

.filter-menu h2 {
  font-size: 1.5rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  margin: 0 0 var(--spacing-xl) 0;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--spacing-lg);
}

.filter-controls {
  display: flex;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-xl);
  flex-wrap: wrap;
}

.filter-btn {
  background: rgba(255, 255, 255, 0.1);
  border: 1px solid rgba(255, 255, 255, 0.2);
  color: var(--color-text);
  padding: var(--spacing-md) var(--spacing-lg);
  border-radius: var(--radius-md);
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition);
  font-size: 0.9rem;
}

.filter-btn:hover {
  background: rgba(255, 255, 255, 0.15);
  border-color: rgba(255, 255, 255, 0.4);
}

.category-section {
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid rgba(255, 255, 255, 0.08);
  border-radius: var(--radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-lg);
}

.category-title {
  font-weight: 700;
  font-size: 0.95rem;
  color: var(--color-text);
  margin-bottom: var(--spacing-md);
  text-transform: uppercase;
  letter-spacing: 0.8px;
  border-bottom: 1px solid var(--color-border);
  padding-bottom: var(--spacing-md);
}

.category-item {
  display: flex;
  align-items: center;
  gap: var(--spacing-md);
  margin-bottom: var(--spacing-md);
}

.category-item label {
  cursor: pointer;
  user-select: none;
  font-size: 0.95rem;
  color: var(--color-text);
  font-weight: 500;
  transition: color var(--transition);
}

.category-item label:hover {
  color: var(--color-secondary);
}

/* ===== NOTIFICATIONS ===== */
.notification {
  padding: var(--spacing-lg) var(--spacing-xl);
  border-radius: var(--radius-lg);
  font-weight: 600;
  font-size: 0.95rem;
  letter-spacing: 0.3px;
  backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.1);
}

.notification.success {
  background: rgba(76, 175, 80, 0.15);
  border-color: rgba(76, 175, 80, 0.4);
  color: var(--color-success);
}

.notification.error {
  background: rgba(220, 53, 69, 0.15);
  border-color: rgba(220, 53, 69, 0.4);
  color: var(--color-error-text);
}

.notification.info {
  background: rgba(23, 162, 184, 0.15);
  border-color: rgba(23, 162, 184, 0.4);
  color: #5dd5ff;
}

/* ===== SECTION STYLING ===== */
.section, .dropdown-content {
  margin-top: var(--spacing-md);
}

.line, .section-item {
  margin-bottom: var(--spacing-md);
  display: flex;
  align-items: flex-start;
  gap: var(--spacing-md);
  transition: color var(--transition);
}

.line.correct span, .section-item.correct {
  color: var(--color-success) !important;
}

.line.incorrect span, .section-item.incorrect {
  color: var(--color-error-text) !important;
}

/* ===== RESPONSIVE IMPROVEMENTS ===== */
@media (max-width: 768px) {
  :root {
    --spacing-3xl: 32px;
  }
  
  h1 { font-size: 2rem; }
  h2 { font-size: 1.5rem; }
  h3 { font-size: 1.25rem; }
  
  nav {
    gap: var(--spacing-lg);
    font-size: 0.95rem;
  }
  
  .dropdown > summary {
    font-size: 1.1rem;
  }
  
  .card, .feature-card {
    padding: var(--spacing-md);
  }
}

@media (max-width: 480px) {
  body {
    padding: var(--spacing-lg);
  }
  
  nav {
    flex-direction: column;
    gap: var(--spacing-md);
  }

  .filter-controls {
    flex-direction: column;
  }

  .filter-btn {
    width: 100%;
  }
  
  button, .btn {
    width: 100%;
  }
}

/* ===== ACCESSIBILITY IMPROVEMENTS ===== */
:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* Reduced motion support */
@media (prefers-reduced-motion: reduce) {
  * {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
  }
}

/* Dark mode adjustments */
@media (prefers-color-scheme: dark) {
  input[type="text"],
  input[type="email"],
  input[type="password"],
  textarea,
  select {
    color-scheme: dark;
  }
}