/* Due Draghi Design System - Main Styles */
/* Notion-like aesthetic matching quintaedizione.online */

/* ========================================================================
   CSS RESET & BASE STYLES
   ======================================================================== */

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

html {
  font-size: 16px;
  line-height: 1.5;
  -webkit-text-size-adjust: 100%;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-sans);
  font-size: 14px;
  line-height: 1.5;
  color: var(--notion-text);
  background: var(--notion-bg);
  margin: 0;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

/* ========================================================================
   TYPOGRAPHY
   ======================================================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  margin-bottom: var(--space-4);
  color: var(--notion-text);
}

h1 {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
}

h2 {
  font-size: var(--font-size-3xl);
  font-weight: var(--font-weight-bold);
}

h3 {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-semibold);
}

p {
  margin-bottom: var(--space-4);
  line-height: var(--line-height-relaxed);
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color var(--transition-speed-base);
}

a:hover {
  color: var(--primary-dark);
}

a:focus {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

strong, b {
  font-weight: var(--font-weight-bold);
}

em, i {
  font-style: italic;
}

small {
  font-size: var(--font-size-sm);
}

code {
  font-family: var(--font-mono);
  font-size: 0.875em;
  padding: 0.125rem 0.25rem;
  background-color: var(--gray-100);
  border-radius: var(--radius-xs);
}

pre {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
  padding: var(--space-4);
  background-color: var(--gray-100);
  border-radius: var(--radius-md);
  overflow-x: auto;
  margin-bottom: var(--space-4);
}

pre code {
  padding: 0;
  background-color: transparent;
}

ul, ol {
  margin-bottom: var(--space-4);
  padding-left: var(--space-6);
}

li {
  margin-bottom: var(--space-2);
  line-height: var(--line-height-relaxed);
}

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

/* ========================================================================
   CONTAINERS & LAYOUT
   ======================================================================== */

.container {
  width: 100%;
  max-width: var(--container-max-width);
  margin: 0 auto;
  padding: 0 var(--container-padding);
}

@media (min-width: 640px) {
  .container {
    padding: 0 var(--space-6);
  }
}

/* ========================================================================
   BUTTONS
   ======================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  padding: 4px 8px;
  border-radius: var(--notion-radius);
  border: none;
  font-size: 14px;
  font-weight: 400;
  background: transparent;
  color: var(--notion-text);
  cursor: pointer;
  transition: background-color var(--transition-speed-fast);
  text-decoration: none;
  user-select: none;
  white-space: nowrap;
  min-height: 28px;
}

.btn:hover {
  background: var(--notion-hover);
}

.btn:disabled,
.btn[disabled] {
  opacity: 0.4;
  cursor: not-allowed;
}

.btn-primary {
  background: var(--primary);
  color: var(--white);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-weight: 500;
  min-height: 36px;
}

.btn-primary:hover {
  background: var(--primary-dark);
  transform: translateY(-1px);
  box-shadow: var(--shadow-md);
}

.btn-secondary {
  background: var(--white);
  color: var(--primary);
  border: 2px solid var(--primary);
  padding: var(--space-2) var(--space-4);
  border-radius: var(--radius-md);
  font-weight: 500;
  min-height: 36px;
}

.btn-secondary:hover {
  background: var(--primary-light);
}

.btn-ghost {
  background: transparent;
  border: 1px solid var(--notion-border);
}

.btn-ghost:hover {
  background: var(--notion-hover);
}

.btn-large {
  padding: var(--space-3) var(--space-6);
  font-size: var(--font-size-base);
  min-height: 44px;
  border-radius: var(--radius-lg);
}

.btn-sm,
.btn-small {
  padding: var(--space-2) var(--space-4);
  font-size: var(--font-size-sm);
  min-height: 32px;
}

/* ========================================================================
   CARDS
   ======================================================================== */

.card {
  background: var(--white);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
  border: 1px solid var(--gray-200);
  transition: box-shadow var(--transition-speed-base), transform var(--transition-speed-base);
}

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

.card-header {
  margin-bottom: var(--space-4);
}

.card-header h2 {
  font-size: var(--font-size-xl);
  font-weight: 600;
  color: var(--gray-800);
  margin-bottom: var(--space-2);
}

.card-header p {
  color: var(--gray-600);
  font-size: var(--font-size-sm);
}

/* ========================================================================
   FORM ELEMENTS
   ======================================================================== */

.form-group {
  margin-bottom: var(--space-4);
}

.form-label {
  display: block;
  font-weight: var(--font-weight-medium);
  margin-bottom: var(--space-2);
  color: var(--notion-text);
  font-size: var(--font-size-sm);
}

.form-input,
.form-select {
  width: 100%;
  border: 1px solid var(--notion-border);
  border-radius: var(--notion-radius);
  padding: 8px 12px;
  font-size: 14px;
  background: var(--notion-bg);
  color: var(--notion-text);
  line-height: 1.4;
  transition: all var(--transition-speed-base);
}

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

.form-input:focus,
.form-select:focus {
  outline: none;
  box-shadow: rgba(239, 68, 68, 0.35) 0px 0px 0px 2px;
  border-color: var(--primary);
}

.form-help {
  font-size: var(--font-size-sm);
  color: var(--notion-text-light);
  margin-top: var(--space-2);
}

.form-error {
  font-size: var(--font-size-sm);
  color: var(--error);
  margin-top: var(--space-2);
  font-weight: var(--font-weight-medium);
}

.radio-group {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
  margin-bottom: var(--space-4);
}

.radio-option {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  cursor: pointer;
  user-select: none;
}

.radio-option input[type="radio"] {
  cursor: pointer;
}

.radio-option span {
  font-size: var(--font-size-sm);
  color: var(--notion-text);
}

/* ========================================================================
   GRID & COLLECTIONS
   ======================================================================== */

.collection-grid {
  display: grid;
  grid-template-columns: repeat(1, 1fr);
  gap: var(--space-4);
}

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

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

.collection-card {
  display: block;
  background: var(--white);
  border: 1px solid var(--gray-200);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  text-decoration: none;
  color: var(--gray-800);
  transition: all var(--transition-speed-base);
  position: relative;
  overflow: hidden;
}

.collection-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: linear-gradient(135deg, transparent 0%, rgba(239, 68, 68, 0.05) 100%);
  opacity: 0;
  transition: opacity var(--transition-speed-base);
}

.collection-card:hover::before {
  opacity: 1;
}

.collection-card:hover {
  border-color: var(--primary);
  transform: translateY(-4px);
  box-shadow: var(--shadow-lg);
}

.collection-card-content {
  position: relative;
  z-index: 1;
}

.collection-card-header {
  display: flex;
  align-items: start;
  justify-content: space-between;
  gap: var(--space-3);
  margin-bottom: var(--space-2);
}

.collection-card-title {
  font-size: var(--font-size-lg);
  font-weight: 600;
  margin-bottom: var(--space-1);
}

.collection-card-subtitle {
  font-size: var(--font-size-xs);
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: var(--space-1);
}

.collection-card-key {
  font-size: var(--font-size-xs);
  color: var(--gray-400);
  font-family: var(--font-mono);
}

.collection-badge {
  font-size: var(--font-size-xs);
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  padding: var(--space-1) var(--space-2);
  border-radius: var(--radius-sm);
  color: var(--gray-600);
  font-weight: 500;
  flex-shrink: 0;
}

.collection-card-footer {
  margin-top: var(--space-2);
  color: var(--primary);
  font-size: var(--font-size-sm);
  opacity: 0.7;
  transition: opacity var(--transition-speed-base);
}

.collection-card:hover .collection-card-footer {
  opacity: 1;
}

/* ========================================================================
   HEADER & NAVIGATION
   ======================================================================== */

.header {
  background: linear-gradient(135deg, var(--primary) 0%, var(--primary-dark) 100%);
  color: var(--white);
  padding: var(--space-6) 0;
  text-align: center;
  box-shadow: var(--shadow-lg);
  position: relative;
  overflow: hidden;
}

.header::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="pattern" patternUnits="userSpaceOnUse" width="20" height="20" patternTransform="rotate(45)"><circle cx="10" cy="10" r="1" fill="rgba(255,255,255,0.1)"/></pattern></defs><rect width="100" height="100" fill="url(%23pattern)"/></svg>');
  opacity: 0.3;
}

.header > * {
  position: relative;
  z-index: 1;
}

.header h1 {
  font-size: var(--font-size-3xl);
  font-weight: 700;
  margin-bottom: var(--space-2);
}

@media (min-width: 768px) {
  .header h1 {
    font-size: var(--font-size-4xl);
  }
}

.header p {
  font-size: var(--font-size-lg);
  opacity: 0.9;
  max-width: 600px;
  margin: 0 auto;
}

.notion-nav {
  position: sticky;
  top: 0;
  z-index: 40;
  border-bottom: 1px solid var(--notion-border);
  background: var(--notion-bg);
}

.notion-nav-container {
  max-width: 1024px;
  margin: 0 auto;
  padding: var(--space-3) var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-4);
}

.breadcrumb {
  font-size: var(--font-size-sm);
  display: flex;
  align-items: center;
  gap: var(--space-2);
  position: relative;
}

.breadcrumb-separator {
  color: var(--notion-text-light);
}

/* ========================================================================
   SEARCH
   ======================================================================== */

.search-container {
  position: relative;
  display: inline-flex;
  align-items: center;
  gap: var(--space-1);
}

.search-results {
  position: absolute;
  left: 0;
  top: 100%;
  margin-top: var(--space-1);
  width: 384px;
  max-height: 320px;
  overflow: auto;
  background: var(--notion-bg);
  border: 1px solid var(--notion-border);
  border-radius: var(--notion-radius);
  box-shadow: var(--shadow-lg);
  z-index: 50;
}

.search-dropdown {
  position: absolute;
  left: 0;
  right: 0;
  top: calc(100% + var(--space-2));
  max-height: 480px;
  overflow-y: auto;
  background: var(--notion-bg);
  border: 1px solid var(--notion-border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  z-index: 50;
  -webkit-overflow-scrolling: touch;
  animation: slideDown 0.15s ease-out;
  transform-origin: top;
}

@keyframes slideDown {
  from {
    opacity: 0;
    transform: translateY(-8px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.search-dropdown:empty {
  display: none;
}

.search-container-wrapper {
  background: var(--white);
  border: 1px solid var(--notion-border);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  margin-bottom: var(--space-4);
  box-shadow: var(--shadow-sm);
}

.search-input-group {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  position: relative;
}

.field {
  width: 100%;
  border: 1px solid var(--notion-border);
  border-radius: var(--notion-radius);
  padding: 8px 12px;
  font-size: 14px;
  background: var(--notion-bg);
  color: var(--notion-text);
  line-height: 1.4;
  transition: all var(--transition-speed-base);
}

.field::placeholder {
  color: var(--notion-text-light);
}

.field:focus {
  outline: none;
  box-shadow: rgba(239, 68, 68, 0.35) 0px 0px 0px 2px;
}

/* ========================================================================
   UTILITIES
   ======================================================================== */

.hidden {
  display: none !important;
}

.truncate {
  overflow: hidden;
  text-overflow: ellipsis;
  white-space: nowrap;
}

.mono {
  font-family: var(--font-mono);
  font-size: var(--font-size-sm);
}

.tag {
  display: inline-block;
  background: var(--gray-100);
  border: 1px solid var(--gray-200);
  padding: var(--space-2) var(--space-3);
  border-radius: var(--radius-sm);
  color: var(--gray-600);
  font-size: var(--font-size-xs);
  font-weight: 500;
}

.flex {
  display: flex;
}

.gap-2 {
  gap: var(--space-2);
}

.gap-3 {
  gap: var(--space-3);
}

.gap-4 {
  gap: var(--space-4);
}

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

.mb-6 {
  margin-bottom: var(--space-6);
}

/* ========================================================================
   LOADING & OVERLAYS
   ======================================================================== */

.page-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  display: none;
  background: rgba(255, 255, 255, 0.8);
  z-index: 1000;
}

.page-overlay.htmx-request {
  display: flex;
}

.page-overlay-inner {
  margin: auto;
  display: flex;
  align-items: center;
  justify-content: center;
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--gray-200);
  border-top-color: var(--primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

/* ========================================================================
   FLASH MESSAGES
   ======================================================================== */

.flash-message {
  padding: var(--space-3) var(--space-4);
  border-radius: var(--radius-md);
  border: 1px solid;
  font-size: var(--font-size-sm);
  margin-bottom: var(--space-3);
  animation: slideDown 0.2s ease-out;
}

.flash-message.flash-error {
  background: #fef2f2;
  color: #991b1b;
  border-color: #fca5a5;
}

.flash-message.flash-success {
  background: #d1fae5;
  color: #065f46;
  border-color: #a7f3d0;
}

/* ========================================================================
   FORM PANEL & RESULT CARD
   ======================================================================== */

.form-panel {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-6);
  box-shadow: var(--shadow-md);
  border: 1px solid var(--gray-200);
}

.form-panel h2 {
  margin-top: 0;
  margin-bottom: var(--space-4);
  color: var(--gray-800);
}

.result-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--space-6);
  margin-bottom: var(--space-4);
  border: 1px solid var(--gray-200);
  box-shadow: var(--shadow-md);
  transition: all var(--transition-speed-base);
}

.result-card.success {
  border-color: var(--primary);
  box-shadow: var(--shadow-lg);
}

.tile {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: var(--space-4);
  border: 1px solid var(--gray-200);
  transition: all var(--transition-speed-base);
}

.tile h3 {
  margin-top: 0;
  color: var(--primary);
  font-size: var(--font-size-lg);
}

.tile p {
  margin-bottom: 0;
  color: var(--notion-text-light);
  font-size: var(--font-size-sm);
}

/* ========================================================================
   ACCESSIBILITY
   ======================================================================== */

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

:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
}

:focus:not(:focus-visible) {
  outline: none;
}

/* ========================================================================
   MOBILE & RESPONSIVE
   ======================================================================== */

@media (max-width: 640px) {
  .btn {
    min-height: 44px !important;
    min-width: 44px !important;
    padding: 8px 12px !important;
  }

  .search-container-wrapper {
    padding: var(--space-3) !important;
  }

  .search-input-group {
    flex-wrap: nowrap !important;
    gap: var(--space-2) !important;
  }

  .search-container-wrapper input {
    min-height: 44px !important;
    flex: 1 1 auto !important;
    font-size: 16px !important;
  }

  .collection-grid {
    grid-template-columns: 1fr !important;
    gap: var(--space-3) !important;
  }

  .collection-card {
    padding: var(--space-4) !important;
    min-height: 80px !important;
  }

  .collection-card h3 {
    font-size: var(--font-size-lg) !important;
  }

  .breadcrumb {
    flex-wrap: wrap !important;
    gap: var(--space-1) !important;
    font-size: 12px !important;
  }

  .breadcrumb .search-container {
    flex-basis: 100% !important;
    margin-top: var(--space-2) !important;
  }

  .breadcrumb .search-container input {
    width: 100% !important;
  }

  .field {
    min-height: 44px !important;
    font-size: 16px !important;
    padding: 10px 12px !important;
  }

  .form-input,
  .form-select {
    min-height: 44px !important;
    font-size: 16px !important;
  }

  .header h1 {
    font-size: var(--font-size-xl) !important;
  }

  .notion-nav-container {
    padding: var(--space-2) var(--space-3) !important;
  }

  .container {
    padding: 0 var(--space-3) !important;
  }

  .search-dropdown {
    max-height: 60vh !important;
    left: 0 !important;
    right: 0 !important;
    width: auto !important;
  }

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

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

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

@media (min-width: 640px) and (max-width: 1024px) {
  .collection-grid {
    grid-template-columns: repeat(2, 1fr) !important;
  }

  .container {
    padding: 0 var(--space-4) !important;
  }
}

/* ========================================================================
   REDUCED MOTION
   ======================================================================== */

@media (prefers-reduced-motion: reduce) {
  *,
  *::before,
  *::after {
    animation-duration: 0.01ms !important;
    animation-iteration-count: 1 !important;
    transition-duration: 0.01ms !important;
    scroll-behavior: auto !important;
  }
}