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

:root {
  --lavender: #C5C6E8;
  --lavender-light: #D0D1F0;
  --lavender-tint: #E8E8F5;
  --pale-yellow: #F5E6B8;
  --yellow-light: #FFF2CC;
  --charcoal: #2D2D2D;
  --white: #FFFFFF;
  --off-white: #FAFAFA;
  --font-heading: 'Quicksand', sans-serif;
  --font-body: 'Lato', sans-serif;
  --radius: 12px;
  --shadow: 0 2px 12px rgba(0, 0, 0, 0.06);
  --shadow-lg: 0 4px 24px rgba(0, 0, 0, 0.08);
}

html {
  font-size: 16px;
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-body);
  color: var(--charcoal);
  background: var(--off-white);
  line-height: 1.7;
  min-height: 100vh;
}

.intervention-page {
  position: relative;
}

.intervention-page .bg-lines {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  pointer-events: none;
  z-index: 0;
  opacity: 0.18;
}

/* ===== Landing Page ===== */
.landing-page {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  background: linear-gradient(160deg, var(--off-white) 0%, var(--lavender-tint) 50%, var(--off-white) 100%);
  position: relative;
  overflow-x: hidden;
}

.deco-line {
  position: absolute;
  width: 100%;
  pointer-events: none;
}

.deco-line--fullscreen {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  z-index: 0;
}

.landing {
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 2rem;
  width: 100%;
  z-index: 1;
}

.landing__card {
  background: var(--white);
  border-radius: var(--radius);
  box-shadow: var(--shadow-lg);
  padding: 3rem 2.5rem;
  max-width: 560px;
  width: 100%;
  text-align: center;
}

.landing__image {
  width: 160px;
  height: 160px;
  border-radius: 50%;
  object-fit: cover;
  margin-bottom: 1.5rem;
}

.landing__title {
  font-family: var(--font-heading);
  font-size: 1.75rem;
  font-weight: 700;
  color: var(--charcoal);
  margin-bottom: 0.5rem;
}

.landing__subtitle {
  font-family: var(--font-heading);
  font-size: 1.05rem;
  font-weight: 500;
  color: #6B6BA0;
  margin-bottom: 1.25rem;
}

.landing__description {
  font-size: 0.95rem;
  color: #555;
  margin-bottom: 1rem;
  line-height: 1.7;
}

.landing__privacy {
  font-size: 0.82rem;
  color: #888;
  margin-bottom: 0.75rem;
  font-style: italic;
}

.landing__details {
  text-align: left;
  margin-bottom: 1.25rem;
  width: 100%;
}

.landing__details-toggle {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.92rem;
  color: #6B6BA0;
  cursor: pointer;
  padding: 0.5rem 0;
  list-style: none;
  display: flex;
  align-items: center;
  gap: 0.4rem;
}

.landing__details-toggle::-webkit-details-marker {
  display: none;
}

.landing__details-toggle::before {
  content: '\25B6';
  font-size: 0.65rem;
  transition: transform 0.2s ease;
  display: inline-block;
}

.landing__details[open] .landing__details-toggle::before {
  transform: rotate(90deg);
}

.landing__details-content {
  padding-top: 0.5rem;
}

.landing__detail-item {
  margin-bottom: 0.85rem;
}

.landing__detail-item strong {
  font-family: var(--font-heading);
  font-size: 0.93rem;
  color: var(--charcoal);
}

.landing__detail-item p {
  font-size: 0.9rem;
  color: #555;
  line-height: 1.6;
  margin-top: 0.2rem;
}

.landing__author {
  font-family: var(--font-heading);
  font-size: 0.88rem;
  font-weight: 600;
  color: #6B6BA0;
  margin-bottom: 1.75rem;
}

.landing__actions {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
}

/* ===== Buttons ===== */
.btn {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
  border: none;
  border-radius: 8px;
  padding: 0.75rem 2rem;
  cursor: pointer;
  transition: all 0.2s ease;
  text-decoration: none;
  display: inline-block;
}

.btn--primary {
  background: var(--lavender);
  color: var(--charcoal);
}

.btn--primary:hover {
  background: #B0B1D8;
  box-shadow: 0 2px 8px rgba(197, 198, 232, 0.5);
}

.btn--secondary {
  background: var(--lavender-tint);
  color: var(--charcoal);
}

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

.btn--outline {
  background: transparent;
  color: var(--charcoal);
  border: 1.5px solid var(--lavender);
  padding: 0.5rem 1.25rem;
  font-size: 0.88rem;
}

.btn--outline:hover {
  background: var(--lavender-tint);
}

/* ===== Header ===== */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0.75rem 1.5rem;
  background: var(--white);
  border-bottom: 1px solid var(--lavender-tint);
  position: sticky;
  top: 0;
  z-index: 100;
}

.tabs, .progress-bar, .stage, .step-nav {
  position: relative;
  z-index: 1;
}

.header__logo {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  text-decoration: none;
  color: var(--charcoal);
}

.header__logo-img {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  object-fit: cover;
  flex-shrink: 0;
}

.header__title {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 1rem;
}

/* ===== Tabs ===== */
.tabs {
  display: flex;
  gap: 0.5rem;
  padding: 1rem 1.5rem 1.5rem;
  background: var(--white);
  justify-content: center;
  flex-wrap: wrap;
}

.tab {
  font-family: var(--font-heading);
  font-weight: 600;
  font-size: 0.9rem;
  border: none;
  border-radius: 30px;
  padding: 0.6rem 1.5rem;
  cursor: pointer;
  background: var(--lavender-tint);
  color: var(--charcoal);
  transition: all 0.2s ease;
}

.tab--active {
  background: var(--lavender);
  color: var(--charcoal);
  box-shadow: 0 2px 8px rgba(197, 198, 232, 0.4);
}

.tab:hover:not(.tab--active) {
  background: var(--lavender-light);
}

.tab--home {
  text-decoration: none;
  display: inline-flex;
  align-items: center;
}

/* ===== Progress Bar ===== */
.progress-bar {
  height: 4px;
  background: var(--lavender-tint);
  margin: 0.75rem 1.5rem 0;
  border-radius: 4px;
  overflow: hidden;
}

.progress-bar__fill {
  height: 100%;
  background: var(--lavender);
  border-radius: 4px;
  transition: width 0.3s ease;
  width: 0%;
}

/* ===== Stage / Steps ===== */
.stage {
  max-width: 720px;
  margin: 0 auto;
  padding: 1.5rem;
}

.step {
  display: none;
}

.step.step--active {
  display: block;
  animation: fadeIn 0.3s ease;
}

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

.step h2 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  color: var(--charcoal);
}

/* ===== Text Blocks ===== */
.text-block {
  background: var(--white);
  border-radius: var(--radius);
  padding: 1.5rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--lavender);
}

.text-block p {
  margin-bottom: 0.85rem;
}

.text-block p:last-child {
  margin-bottom: 0;
}

.text-block ul {
  margin: 0.5rem 0 0.85rem 1.5rem;
}

.text-block li {
  margin-bottom: 0.4rem;
}

.completion-block {
  text-align: center;
  border-left-color: #A0D8A0;
}

/* ===== Audio Player ===== */
.audio-player {
  width: 100%;
  margin-bottom: 1.25rem;
  border-radius: 8px;
}

/* ===== Guided Exercise Block ===== */
.guided-exercise {
  background: var(--yellow-light);
  border-radius: var(--radius);
  padding: 1.75rem;
  margin-bottom: 1.25rem;
  box-shadow: var(--shadow);
  border-left: 4px solid var(--lavender);
  font-style: italic;
}

.guided-exercise p {
  margin-bottom: 1rem;
}

.guided-exercise p:last-child {
  margin-bottom: 0;
}

.guided-exercise__pause {
  text-align: center;
  color: #888;
  font-size: 0.9rem;
}

/* ===== Form Fields ===== */
.field-label {
  display: block;
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 0.5rem;
  margin-top: 0.25rem;
  line-height: 1.6;
}

.textarea {
  width: 100%;
  font-family: var(--font-body);
  font-size: 0.95rem;
  line-height: 1.6;
  padding: 1rem;
  border: 1.5px solid var(--lavender);
  border-radius: var(--radius);
  background: var(--white);
  color: var(--charcoal);
  resize: vertical;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  margin-bottom: 1rem;
}

.textarea:focus {
  outline: none;
  border-color: #B0B1D8;
  box-shadow: 0 0 0 3px rgba(197, 198, 232, 0.3);
}

.text-input {
  width: 100%;
  font-family: var(--font-body);
  font-size: 0.95rem;
  padding: 0.75rem 1rem;
  border: 1.5px solid var(--lavender);
  border-radius: 8px;
  background: var(--white);
  color: var(--charcoal);
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
  margin-bottom: 1rem;
}

.text-input:focus {
  outline: none;
  border-color: #B0B1D8;
  box-shadow: 0 0 0 3px rgba(197, 198, 232, 0.3);
}

/* ===== Sliders ===== */
.slider-container {
  background: var(--white);
  border-radius: var(--radius);
  padding: 1.5rem;
  box-shadow: var(--shadow);
  margin-bottom: 1rem;
}

.slider {
  -webkit-appearance: none;
  appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--lavender-tint);
  outline: none;
  margin-bottom: 0.5rem;
}

.slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--charcoal);
  cursor: pointer;
  border: 3px solid var(--lavender);
  transition: box-shadow 0.2s ease;
}

.slider::-webkit-slider-thumb:hover {
  box-shadow: 0 0 0 4px rgba(197, 198, 232, 0.4);
}

.slider::-moz-range-thumb {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--charcoal);
  cursor: pointer;
  border: 3px solid var(--lavender);
}

.slider-labels {
  display: flex;
  justify-content: space-between;
  font-size: 0.75rem;
  color: #888;
  margin-bottom: 0.5rem;
}

.slider-value {
  text-align: center;
  font-size: 0.9rem;
  color: #666;
}

/* ===== Fears (Checkboxes) ===== */
.fears-list {
  margin-bottom: 1rem;
}

.fear-item {
  background: var(--white);
  border-radius: var(--radius);
  padding: 1rem 1.25rem;
  margin-bottom: 0.75rem;
  box-shadow: var(--shadow);
  border-left: 4px solid transparent;
  transition: border-color 0.2s ease;
}

.fear-item.fear-item--selected {
  border-left-color: var(--lavender);
  background: var(--lavender-tint);
}

.fear-checkbox {
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
  cursor: pointer;
}

.fear-input {
  margin-top: 0.25rem;
  width: 18px;
  height: 18px;
  accent-color: var(--lavender);
  flex-shrink: 0;
}

.fear-label {
  font-size: 0.93rem;
  line-height: 1.5;
}

.fear-explanation {
  margin-top: 0.75rem;
  padding: 1rem;
  background: var(--yellow-light);
  border-radius: 8px;
  font-size: 0.9rem;
  line-height: 1.6;
}

.fear-explanation p {
  margin: 0;
}

.fear-validation {
  color: #C44;
  font-size: 0.88rem;
  font-weight: 600;
  text-align: center;
}

/* ===== Reset Button ===== */
.reset-btn {
  display: block;
  margin-top: 1rem;
}

/* ===== Info Pages (For Therapists, Resources) ===== */
.info-page h2 {
  font-family: var(--font-heading);
  font-size: 1.5rem;
  font-weight: 700;
  margin-bottom: 1.25rem;
  color: var(--charcoal);
}

.info-page h3 {
  font-family: var(--font-heading);
  font-size: 1.15rem;
  font-weight: 700;
  margin-bottom: 0.75rem;
  color: var(--charcoal);
}

.info-page .text-block ul {
  margin: 0.5rem 0 0.85rem 1.5rem;
}

.info-page .text-block li {
  margin-bottom: 0.5rem;
}

.info-page .text-block hr {
  border: none;
  border-top: 1px solid var(--lavender);
  margin: 1rem 0;
}

.info-page .text-block a {
  color: #6B6BA0;
  text-decoration: underline;
}

.info-page .text-block a:hover {
  color: var(--charcoal);
}

.resource-list {
  list-style: none;
  margin-left: 0 !important;
  padding-left: 0;
}

.resource-list li {
  padding: 0.5rem 0;
  border-bottom: 1px solid var(--lavender-tint);
}

.resource-list li:last-child {
  border-bottom: none;
}

.feedback-template {
  border-left-color: var(--pale-yellow);
  background: var(--yellow-light);
}

/* ===== Step Navigation ===== */
.step-nav {
  display: flex;
  justify-content: space-between;
  max-width: 720px;
  margin: 0 auto;
  padding: 0.5rem 1.5rem 2.5rem;
}

/* ===== Responsive ===== */
@media (max-width: 640px) {
  .landing__card {
    padding: 2rem 1.5rem;
  }

  .landing__title {
    font-size: 1.4rem;
  }

  .landing__image {
    width: 120px;
    height: 120px;
  }

  .header {
    flex-direction: column;
    gap: 0.5rem;
    padding: 0.75rem 1rem;
  }

  .header__title {
    font-size: 0.88rem;
  }

  .tabs {
    padding: 0.75rem 1rem 0;
  }

  .tab {
    font-size: 0.8rem;
    padding: 0.5rem 1rem;
  }

  .stage {
    padding: 1rem;
  }

  .step h2 {
    font-size: 1.25rem;
  }

  .text-block, .guided-exercise {
    padding: 1rem;
  }

  .step-nav {
    padding: 0.5rem 1rem 2rem;
  }

  .slider-labels span {
    font-size: 0.65rem;
  }
}

@media (max-width: 400px) {
  .slider-labels span:nth-child(even) {
    display: none;
  }
}