/* ═══════════════════════════════════════════════════════════════
   rechnify.at UX Enhancements
   Modern progressive disclosure patterns for calculator UIs
   ═══════════════════════════════════════════════════════════════ */

/* ── 1. COLLAPSIBLE DETAILS (Progressive Disclosure) ─────────── */

.disclosure {
  margin: 16px 0;
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-card);
  overflow: hidden;
  transition: all var(--dur-short) var(--ease-out);
}

.disclosure:hover {
  border-color: var(--color-accent);
  box-shadow: 0 2px 8px color-mix(in oklch, var(--color-accent) 10%, transparent);
}

.disclosure summary {
  padding: 14px 18px;
  background: var(--color-paper-2);
  cursor: pointer;
  font-weight: 600;
  font-size: var(--text-sm);
  display: flex;
  align-items: center;
  justify-content: space-between;
  user-select: none;
  transition: background var(--dur-short) var(--ease-out);
}

.disclosure summary:hover {
  background: var(--color-paper-3);
}

.disclosure summary::marker {
  display: none;
}

.disclosure summary::after {
  content: '▼';
  font-size: 0.75em;
  color: var(--color-ink-3);
  transition: transform var(--dur-short) var(--ease-out);
}

.disclosure[open] summary::after {
  transform: rotate(180deg);
}

.disclosure-content {
  padding: 16px 18px;
  background: var(--color-paper);
  font-size: var(--text-sm);
  line-height: 1.6;
}

.disclosure-content > *:first-child {
  margin-top: 0;
}

.disclosure-content > *:last-child {
  margin-bottom: 0;
}

/* Disclosure Variants */
.disclosure.info {
  border-color: var(--color-info);
  background: var(--color-info-bg);
}

.disclosure.info summary {
  background: var(--color-info-bg);
  color: var(--color-info);
}

.disclosure.success {
  border-color: var(--color-success);
  background: var(--color-success-bg);
}

.disclosure.success summary {
  background: var(--color-success-bg);
  color: var(--color-success);
}

.disclosure.warning {
  border-color: var(--color-warning);
  background: var(--color-warning-bg);
}

.disclosure.warning summary {
  background: var(--color-warning-bg);
  color: var(--color-warning);
}

/* ── 2. TOOLTIP SYSTEM ────────────────────────────────────────── */

.tooltip-trigger {
  position: relative;
  display: inline-block;
  border-bottom: 1px dashed var(--color-accent);
  cursor: help;
  color: var(--color-accent);
}

.tooltip-trigger sup {
  font-size: 0.7em;
  margin-left: 2px;
  opacity: 0.7;
}

.tooltip-trigger:hover {
  border-bottom-style: solid;
}

.tooltip {
  position: absolute;
  bottom: calc(100% + 8px);
  left: 50%;
  transform: translateX(-50%);
  background: var(--color-ink);
  color: var(--color-paper);
  padding: 8px 12px;
  border-radius: var(--radius-sm);
  font-size: var(--text-xs);
  line-height: 1.4;
  white-space: nowrap;
  max-width: 280px;
  white-space: normal;
  z-index: 1000;
  opacity: 0;
  pointer-events: none;
  transition: opacity var(--dur-short) var(--ease-out);
  box-shadow: 0 4px 12px rgba(0,0,0,0.15);
}

.tooltip::after {
  content: '';
  position: absolute;
  top: 100%;
  left: 50%;
  transform: translateX(-50%);
  border: 6px solid transparent;
  border-top-color: var(--color-ink);
}

.tooltip-trigger:hover .tooltip,
.tooltip-trigger:focus .tooltip {
  opacity: 1;
  pointer-events: auto;
}

body.dark .tooltip {
  background: var(--color-paper-2);
  color: var(--color-ink);
  border: 1px solid var(--color-rule);
}

body.dark .tooltip::after {
  border-top-color: var(--color-paper-2);
}

/* Mobile: show tooltip on tap */
@media (max-width: 768px) {
  .tooltip {
    bottom: auto;
    top: calc(100% + 8px);
    left: 0;
    transform: none;
    max-width: 240px;
  }
  
  .tooltip::after {
    top: -12px;
    bottom: auto;
    left: 20px;
    transform: none;
    border-top-color: transparent;
    border-bottom-color: var(--color-ink);
  }
  
  body.dark .tooltip::after {
    border-bottom-color: var(--color-paper-2);
  }
}

/* ── 3. MINI MODAL SYSTEM ─────────────────────────────────────── */

.modal-trigger {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--color-accent);
  background: none;
  border: none;
  cursor: pointer;
  font-size: var(--text-sm);
  font-weight: 600;
  padding: 0;
  text-decoration: underline;
  text-decoration-style: dotted;
  transition: opacity var(--dur-short) var(--ease-out);
}

.modal-trigger:hover {
  opacity: 0.8;
}

.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.5);
  backdrop-filter: blur(4px);
  z-index: 9998;
  display: none;
  animation: fadeIn 0.2s var(--ease-out);
}

.modal-overlay.active {
  display: block;
}

@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

.modal {
  position: fixed;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  background: var(--color-paper);
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-lg);
  box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
  max-width: 600px;
  width: calc(100% - 32px);
  max-height: calc(100vh - 64px);
  overflow: hidden;
  z-index: 9999;
  display: none;
  animation: slideUp 0.3s var(--ease-out);
}

.modal.active {
  display: flex;
  flex-direction: column;
}

@keyframes slideUp {
  from {
    opacity: 0;
    transform: translate(-50%, -45%);
  }
  to {
    opacity: 1;
    transform: translate(-50%, -50%);
  }
}

.modal-header {
  padding: 20px 24px;
  border-bottom: 1px solid var(--color-rule);
  display: flex;
  align-items: center;
  justify-content: space-between;
  background: var(--color-paper-2);
}

.modal-title {
  font-size: var(--text-lg);
  font-weight: 700;
  margin: 0;
  color: var(--color-ink);
}

.modal-close {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  border: none;
  background: var(--color-paper-3);
  color: var(--color-ink-2);
  font-size: 1.2rem;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: all var(--dur-short) var(--ease-out);
}

.modal-close:hover {
  background: var(--color-danger);
  color: white;
  transform: rotate(90deg);
}

.modal-body {
  padding: 24px;
  overflow-y: auto;
  flex: 1;
}

.modal-body h3 {
  margin-top: 0;
  font-size: var(--text-md);
}

.modal-body p {
  line-height: 1.7;
  color: var(--color-ink-2);
}

.modal-body ul, .modal-body ol {
  padding-left: 1.5rem;
  line-height: 1.8;
}

.modal-body code {
  background: var(--color-paper-2);
  padding: 2px 6px;
  border-radius: 4px;
  font-size: 0.9em;
}

/* ── 4. EXPAND/COLLAPSE TOGGLE BUTTON ────────────────────────── */

.expand-toggle {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100%;
  padding: 12px;
  margin-top: 16px;
  background: var(--color-paper-2);
  border: 1px solid var(--color-rule);
  border-radius: var(--radius-sm);
  color: var(--color-accent);
  font-weight: 600;
  font-size: var(--text-sm);
  cursor: pointer;
  transition: all var(--dur-short) var(--ease-out);
}

.expand-toggle:hover {
  background: var(--color-accent-s);
  border-color: var(--color-accent);
}

.expand-toggle .icon {
  transition: transform var(--dur-short) var(--ease-out);
}

.expand-toggle.expanded .icon {
  transform: rotate(180deg);
}

/* ── 5. STICKY CTA (Mobile) ───────────────────────────────────── */

@media (max-width: 768px) {
  .btn-calculate-sticky {
    position: sticky;
    bottom: 16px;
    z-index: 100;
    width: calc(100% + 48px);
    margin: 24px -24px -24px;
    padding: 16px;
    background: var(--color-paper);
    border-top: 1px solid var(--color-rule);
    box-shadow: 0 -4px 12px rgba(0, 0, 0, 0.1);
  }
  
  .btn-calculate-sticky .btn {
    width: 100%;
    font-size: var(--text-md);
    padding: 16px;
  }
}

/* ── 6. RESULT ANIMATIONS ─────────────────────────────────────── */

.result-box {
  animation: slideInUp 0.4s var(--ease-out);
}

@keyframes slideInUp {
  from {
    opacity: 0;
    transform: translateY(20px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.result-card {
  animation: scaleIn 0.3s var(--ease-out);
  animation-fill-mode: both;
}

.result-card:nth-child(1) { animation-delay: 0.05s; }
.result-card:nth-child(2) { animation-delay: 0.1s; }
.result-card:nth-child(3) { animation-delay: 0.15s; }
.result-card:nth-child(4) { animation-delay: 0.2s; }

@keyframes scaleIn {
  from {
    opacity: 0;
    transform: scale(0.9);
  }
  to {
    opacity: 1;
    transform: scale(1);
  }
}

/* Reduce motion for accessibility */
@media (prefers-reduced-motion: reduce) {
  .result-box,
  .result-card,
  .modal {
    animation: none;
  }
}