/* =====================================================
    CONSOLIDATED STYLES — Single Source of Truth
    ===================================================== */
:root {
  --font-primary-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --font-current-main: var(--font-primary-sans);
  --font-current-heading: var(--font-primary-sans);
  --font-current-ui: var(--font-primary-sans);

  /* Page / section backgrounds */
  --bg-page: #0f172a;
  --bg-section: #162133;

  /* Text */
  --text-primary: #e2e8f0;
  --text-secondary: #94a3b8;
  --text-heading: #4c0519;
  --text-accent: #881337;
  --text-accent-hover: #4c0519;
  --text-muted: var(--text-secondary);

  /* Borders & shadows */
  --border-color: #334155;
  --shadow-color-rgb: 15, 23, 42;
  --shadow-opacity-xs: 0.07;
  --shadow-opacity-sm: 0.12;
  --shadow-opacity-md: 0.18;
  --shadow-opacity-lg: 0.25;
  --shadow-xs: 0 .125rem .25rem rgba(var(--shadow-color-rgb), var(--shadow-opacity-xs));
  --shadow-sm: 0 .25rem .5rem rgba(var(--shadow-color-rgb), var(--shadow-opacity-sm));
  --shadow-md: 0 .5rem 1rem rgba(var(--shadow-color-rgb), var(--shadow-opacity-md));
  --shadow-lg: 0 1rem 2rem rgba(var(--shadow-color-rgb), var(--shadow-opacity-lg));
  --shadow-xl: 0 1.5rem 3rem rgba(var(--shadow-color-rgb), var(--shadow-opacity-lg));

  /* Cards */
  --card-bg: #1e293b;
  --card-border: var(--border-color);
  --icon-bg: color-mix(in srgb, var(--text-accent) 20%, transparent);
  --icon-bg-step: color-mix(in srgb, var(--text-accent) 25%, transparent);
  --step-number-color: var(--text-accent);

  /* Radii & transitions */
  --border-radius-lg: 0.5rem;
  --border-radius-xl: 0.75rem;
  --border-radius-pill: 50rem;
  --transition-speed-normal: 0.25s;
  --transition-timing-function: cubic-bezier(0.25, 0.1, 0.25, 1);
}

/* ── Section Specific Themes ── */
.theme-pre-op {
  --bg-section: #ffffff;
  --card-bg: #ffffff;
  --card-border: rgba(76, 5, 25, 0.15);
  --text-heading: #4c0519;
  --text-primary: #4c0519;
  --text-secondary: rgba(76, 5, 25, 0.7);
  --text-accent: #881337;
  --text-accent-hover: #4c0519;
  --icon-bg-step: rgba(136, 19, 55, 0.08);
  --step-number-color: #ffffff;
  --shadow-color-rgb: 15, 23, 42;
}

.theme-post-op {
  --bg-section: #ffffff;
  --text-heading: #4c0519;
  --text-primary: #4c0519;
  --text-secondary: rgba(76, 5, 25, 0.8);
  --card-bg: #ffffff;
  --card-border: #4c0519;
  --icon-bg: rgba(76, 5, 25, 0.1);
  --text-accent: #4c0519;
}

/* ── Layout ── */
.section-padding { padding: 80px 20px; }
.section-bg { background-color: var(--bg-section); }
.container {
  max-width: 1200px;
  margin-left: auto;
  margin-right: auto;
  padding-left: 15px;
  padding-right: 15px;
}

/* ── Section Typography ── */
.section-title {
  font-size: clamp(2rem, 5vw, 3rem);
  font-weight: 700;
  text-align: center;
  margin-bottom: 1em;
  position: relative;
}

.section-title::after {
  content: '';
  display: block;
  width: 70px;
  height: 4px;
  background-color: var(--text-accent);
  margin: 0.5em auto 0;
  border-radius: 2px;
}

.section-subtitle {
  font-size: clamp(1rem, 2.5vw, 1.25rem);
  text-align: center;
  max-width: 700px;
  margin: 0 auto 3.5em;
  line-height: 1.7;
}

/* ── Process Steps (Pre-op) ── */
.process-steps-container {
  display: flex;
  flex-direction: column;
  gap: 40px;
}

.process-step-item {
  display: flex;
  align-items: flex-start;
  gap: 30px;
  background-color: var(--card-bg);
  padding: 30px;
  border-radius: var(--border-radius-xl);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow-md);
  position: relative;
  transition: transform var(--transition-speed-normal) var(--transition-timing-function),
              box-shadow var(--transition-speed-normal) var(--transition-timing-function);
}

.process-step-item:hover {
  animation-name: none;
  transform: translateY(-10px) scale(1.01);
  box-shadow: 0 15px 35px rgba(var(--shadow-color-rgb), 0.25);
}

.process-step-icon-wrapper {
  flex-shrink: 0;
  width: 80px;
  height: 80px;
  background-color: var(--icon-bg-step);
  border-radius: var(--border-radius-lg);
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  transition: background-color var(--transition-speed-normal), transform var(--transition-speed-normal);
}

.process-step-item:hover .process-step-icon-wrapper {
  background-color: var(--text-accent);
  transform: scale(1.1);
}

.process-step-icon-wrapper i {
  font-size: 2.5rem;
  color: var(--text-accent);
  transition: color var(--transition-speed-normal);
}

.process-step-item:hover .process-step-icon-wrapper i { color: #0f172a; }

.step-number {
  position: absolute;
  top: -12px;
  left: -12px;
  background-color: var(--step-number-color);
  color: #0f172a;
  width: 30px;
  height: 30px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.9rem;
  font-weight: 700;
  border: 2px solid var(--card-bg);
  box-shadow: 0 2px 5px rgba(var(--shadow-color-rgb), 0.2);
}

.process-step-content { flex-grow: 1; }

.process-step-title {
  font-size: 1.6rem;
  font-weight: 600;
  color: var(--text-heading);
  margin-bottom: 0.5em;
}

.process-step-description {
  font-size: 0.95rem;
  color: var(--text-secondary);
  line-height: 1.7;
}

/* ── Feature Cards (Post-op) ── */
.features-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(400px, 1fr));
  gap: 30px;
}

.feature-card {
  background-color: var(--card-bg);
  border: 1px solid var(--card-border);
  border-radius: var(--border-radius-xl);
  padding: 30px 25px;
  box-shadow: var(--shadow-md);
  position: relative;
  overflow: hidden;
  transition: transform var(--transition-speed-normal) var(--transition-timing-function),
              box-shadow var(--transition-speed-normal) var(--transition-timing-function),
              border-color var(--transition-speed-normal) var(--transition-timing-function);
}

.feature-card:hover {
  transform: translateY(-8px) scale(1.02);
  box-shadow: var(--shadow-xl);
  border-color: var(--text-accent);
}

.feature-icon-wrapper {
  width: 70px;
  height: 70px;
  border-radius: var(--border-radius-lg);
  background-color: var(--icon-bg);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: 20px;
  transition: background-color var(--transition-speed-normal), transform var(--transition-speed-normal);
}

.feature-card:hover .feature-icon-wrapper {
  background-color: var(--text-accent);
  transform: rotate(-10deg) scale(1.1);
}

.feature-icon-wrapper i,
.feature-icon-wrapper svg {
  font-size: 2.2rem;
  color: var(--text-accent);
  transition: color var(--transition-speed-normal);
}

.feature-card:hover .feature-icon-wrapper i,
.feature-card:hover .feature-icon-wrapper svg { color: #ffffff; }

.feature-title {
  font-size: 1.5rem;
  font-weight: 600;
  margin-bottom: 0.6em;
}

.feature-description {
  font-size: 0.95rem;
  line-height: 1.65;
  margin-bottom: 1.2em;
}

.feature-link {
  font-size: 0.9rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  opacity: 0;
  transform: translateY(10px);
  transition: opacity var(--transition-speed-normal) var(--transition-timing-function),
              transform var(--transition-speed-normal) var(--transition-timing-function);
}

.feature-card:hover .feature-link {
  opacity: 1;
  transform: translateY(0);
}

.feature-link svg {
  margin-left: 8px;
  transition: transform 0.2s ease-out;
}

.feature-link:hover svg { transform: translateX(4px); }


/* ── Responsive ── */
@media (max-width: 768px) {
  .process-step-item { flex-direction: column; align-items: center; text-align: center; }
  .process-step-icon-wrapper { margin-bottom: 15px; }
}

@media (max-width: 480px) {
  .process-step-title { font-size: 1.4rem; }
  .feature-title { font-size: 1.3rem; }
  .feature-card { padding: 25px 20px; }
  .features-grid { grid-template-columns: 1fr; }
  .section-padding { padding: 60px 15px; }
  .section-bg { min-height: auto; }
}

/* ── 3D Flip Cards ── */
.flip-card {
  perspective: 1000px;
  width: 100%;
  height: 280px;
  display: block;
}

.flip-card-inner {
  position: relative;
  width: 100%;
  height: 100%;
  transition: transform 0.7s cubic-bezier(0.4, 0.2, 0.2, 1), box-shadow 0.3s ease;
  transform-style: preserve-3d;
  border-radius: 2rem;
}

.flip-card:hover .flip-card-inner,
.flip-card:focus-within .flip-card-inner {
  transform: rotateY(180deg);
  box-shadow: 0 10px 25px rgba(0, 0, 0, 0.1);
}

.flip-card-front,
.flip-card-back {
  position: absolute;
  inset: 0;
  width: 100%;
  height: 100%;
  border-radius: 2rem;
  -webkit-backface-visibility: hidden;
  backface-visibility: hidden;
}

.flip-card-back { transform: rotateY(180deg); }

.section-content-bg { background-color: var(--bg-section-content, var(--bg-section)); }