/* =========================================
   OXYM — Onboarding Styles
   ========================================= */

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

:root {
  --white: #ffffff;
  --black: #0a0a0a;
  --gray-200: #f0f0f0;
  --gray-400: #b0b0b0;
  --gray-500: #888888;
  --gray-600: #666666;
  --font-body: 'Space Grotesk', -apple-system, sans-serif;
  --ease-out-expo: cubic-bezier(0.16, 1, 0.3, 1);
}

body {
  font-family: var(--font-body);
  background-color: var(--white);
  color: var(--black);
  height: 100vh;
  height: 100dvh;
  overflow: hidden;
  display: flex;
  align-items: center;
  justify-content: center;
}

::selection {
  background-color: var(--black);
  color: var(--white);
}

/* --- Progress Bar --- */
.progress-bar {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background-color: var(--gray-200);
  z-index: 10;
}
.progress-fill {
  height: 100%;
  width: 0%;
  background-color: var(--black);
  transition: width 0.6s var(--ease-out-expo);
}

/* --- Container --- */
.onboarding-container {
  width: 100%;
  max-width: 600px;
  padding: 2rem;
  position: relative;
}

/* --- Slides --- */
.question-slide {
  position: absolute;
  top: 50%;
  left: 50%;
  width: 100%;
  transform: translate(-50%, 50%);
  opacity: 0;
  pointer-events: none;
  transition: all 0.7s var(--ease-out-expo);
  padding: 0 2rem;
}

.question-slide.active {
  transform: translate(-50%, -50%);
  opacity: 1;
  pointer-events: auto;
}

.question-slide.prev {
  transform: translate(-50%, -150%);
  opacity: 0;
}

/* --- Typography & Inputs --- */
.q-number {
  font-size: 0.8rem;
  color: var(--gray-400);
  margin-bottom: 1rem;
  letter-spacing: 0.1em;
}

.q-text {
  font-size: 1.8rem;
  font-weight: 400;
  margin-bottom: 2rem;
  line-height: 1.3;
}

.q-subtext {
  font-size: 0.85rem;
  color: var(--gray-500);
  margin-top: -1.5rem;
  margin-bottom: 2rem;
}

.q-input {
  width: 100%;
  font-family: var(--font-body);
  font-size: 1.5rem;
  border: none;
  border-bottom: 1px solid var(--gray-400);
  padding: 0.5rem 0;
  outline: none;
  color: var(--black);
  background: transparent;
  transition: border-color 0.3s ease;
}

.q-input:focus {
  border-color: var(--black);
}

.q-input::placeholder {
  color: var(--gray-400);
  font-size: 1.2rem;
}

/* --- Multiple Choice Grid --- */
.mcq-grid {
  display: flex;
  flex-wrap: wrap;
  gap: 0.75rem;
}

.mcq-option {
  padding: 0.75rem 1.25rem;
  border: 1px solid var(--gray-400);
  border-radius: 999px;
  font-size: 0.9rem;
  cursor: pointer;
  transition: all 0.2s ease;
  user-select: none;
}

.mcq-option:hover {
  border-color: var(--black);
}

.mcq-option.selected {
  background-color: var(--black);
  color: var(--white);
  border-color: var(--black);
}

/* --- Slider --- */
.slider-container {
  width: 100%;
  margin-top: 2rem;
}

.q-slider {
  -webkit-appearance: none;
  width: 100%;
  height: 2px;
  background: var(--gray-400);
  outline: none;
}
.q-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 20px;
  height: 20px;
  border-radius: 50%;
  background: var(--black);
  cursor: pointer;
  transition: transform 0.1s ease;
}
.q-slider::-webkit-slider-thumb:active {
  transform: scale(1.3);
}

.slider-labels {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-top: 1rem;
  font-size: 0.8rem;
  color: var(--gray-500);
}

/* --- Buttons --- */
.next-btn {
  display: inline-block;
  margin-top: 2rem;
  background: transparent;
  border: none;
  font-family: var(--font-body);
  font-size: 0.9rem;
  font-weight: 500;
  cursor: pointer;
  opacity: 0;
  transform: translateY(10px);
  transition: all 0.3s ease;
  color: var(--black);
}

.next-btn.visible {
  opacity: 1;
  transform: translateY(0);
}

.home-btn {
  display: inline-block;
  margin-top: 2rem;
  padding: 0.8rem 1.5rem;
  background-color: var(--black);
  color: var(--white);
  text-decoration: none;
  border-radius: 999px;
  font-size: 0.8rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  transition: transform 0.2s ease;
}
.home-btn:hover {
  transform: scale(1.03);
}

/* --- Final State --- */
.final-state {
  text-align: center;
}
.final-subtext {
  color: var(--gray-500);
  margin-top: -1rem;
}

/* --- Loading Overlay --- */
.loading-overlay {
  position: fixed;
  inset: 0;
  background: rgba(255, 255, 255, 0.9);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.4s ease;
  z-index: 100;
}

.loading-overlay.active {
  opacity: 1;
  pointer-events: auto;
}

.spinner {
  width: 40px;
  height: 40px;
  border: 3px solid var(--gray-200);
  border-top-color: var(--black);
  border-radius: 50%;
  animation: spin 1s linear infinite;
  margin-bottom: 1rem;
}

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

@media (max-width: 600px) {
  .q-text { font-size: 1.5rem; }
  .q-input { font-size: 1.2rem; }
  .question-slide { padding: 0 1rem; }
}