/* ==========================================================================
   Design System CSS — Source of Truth
   Extracted from landingpage.html
   ========================================================================== */

/* --------------------------------------------------------------------------
   1. CSS Custom Properties (Design Tokens)
   -------------------------------------------------------------------------- */

:root {
  /* --- Colors: Primary --- */
  --color-primary-500: #556021;
  --color-primary-600: #434c1a;
  --color-primary-900: #1a1c14;

  /* --- Colors: Accent --- */
  --color-accent-teal-bg: #d8ece8;
  --color-accent-teal-text: #2c5e53;
  --color-accent-lavender-bg: #e2e8f8;

  /* --- Colors: Neutral --- */
  --color-neutral-white: #ffffff;
  --color-neutral-50: #fafafa;
  --color-neutral-75: #fcfcfc;
  --color-neutral-100: #f9f9f9;
  --color-neutral-warm-100: #f4f3ea;
  --color-neutral-warm-150: #f3f2eb;
  --color-neutral-warm-200: #f0f1eb;
  --color-neutral-warm-300: #e8e7de;

  /* --- Colors: Gray --- */
  --color-gray-200: #e5e7eb;
  --color-gray-400: #9ca3af;
  --color-gray-500: #6b7280;
  --color-gray-600: #4b5563;
  --color-gray-900: #111827;

  /* --- Colors: Semantic Text --- */
  --color-text-primary: #111827;
  --color-text-secondary: #4b5563;
  --color-text-tertiary: #6b7280;
  --color-text-muted: #9ca3af;
  --color-text-inverse: #ffffff;
  --color-text-inverse-secondary: #9ca3af;

  /* --- Colors: Backgrounds --- */
  --color-bg-page: #fafafa;
  --color-bg-surface: #ffffff;
  --color-bg-elevated: #fcfcfc;
  --color-bg-warm: #f4f3ea;
  --color-bg-dark: #1a1c14;

  /* --- Colors: Border --- */
  --color-border-default: #e5e7eb;
  --color-border-light: #f3f4f6;

  /* --- Colors: Semantic (Status) --- */
  --color-success: #556021;
  --color-warning: #d97706;
  --color-error: #dc2626;
  --color-info: #2c5e53;

  /* --- Typography --- */
  --font-family-sans: 'Inter', sans-serif;

  --font-size-xs: 0.75rem;    /* 12px */
  --font-size-sm: 0.875rem;   /* 14px */
  --font-size-base: 1rem;     /* 16px */
  --font-size-lg: 1.125rem;   /* 18px */
  --font-size-xl: 1.25rem;    /* 20px */
  --font-size-2xl: 1.5rem;    /* 24px */
  --font-size-3xl: 1.875rem;  /* 30px */
  --font-size-4xl: 2.25rem;   /* 36px */
  --font-size-5xl: 3rem;      /* 48px */
  --font-size-6xl: 3.75rem;   /* 60px */
  --font-size-8xl: 6rem;      /* 96px */

  --font-weight-light: 300;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;
  --font-weight-bold: 700;

  --line-height-none: 1;
  --line-height-tight: 1.25;
  --line-height-snug: 1.375;
  --line-height-normal: 1.5;
  --line-height-relaxed: 1.625;

  --letter-spacing-tighter: -0.05em;
  --letter-spacing-tight: -0.025em;
  --letter-spacing-normal: 0;
  --letter-spacing-wide: 0.05em;

  /* --- Spacing --- */
  --space-0: 0;
  --space-1: 0.25rem;   /* 4px */
  --space-2: 0.5rem;    /* 8px */
  --space-3: 0.75rem;   /* 12px */
  --space-4: 1rem;      /* 16px */
  --space-6: 1.5rem;    /* 24px */
  --space-8: 2rem;      /* 32px */
  --space-10: 2.5rem;   /* 40px */
  --space-12: 3rem;     /* 48px */
  --space-16: 4rem;     /* 64px */
  --space-24: 6rem;     /* 96px */
  --space-32: 8rem;     /* 128px */

  /* --- Border Radius --- */
  --radius-md: 0.375rem;
  --radius-lg: 0.5rem;
  --radius-xl: 0.75rem;
  --radius-2xl: 1rem;
  --radius-3xl: 1.5rem;
  --radius-4xl: 2rem;
  --radius-5xl: 2.5rem;
  --radius-6xl: 3rem;
  --radius-full: 9999px;

  /* --- Shadows --- */
  --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
  --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
  --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

  /* --- Breakpoints (for reference, use in @media) --- */
  --breakpoint-sm: 640px;
  --breakpoint-md: 768px;
  --breakpoint-lg: 1024px;
  --breakpoint-xl: 1280px;

  /* --- Container widths --- */
  --container-sm: 24rem;
  --container-md: 28rem;
  --container-2xl: 42rem;
  --container-3xl: 48rem;
  --container-4xl: 56rem;
  --container-6xl: 72rem;
  --container-7xl: 80rem;

  /* --- Z-Index --- */
  --z-behind: 0;
  --z-default: 1;
  --z-raised: 10;
  --z-dropdown: 20;
  --z-modal: 50;

  /* --- Motion --- */
  --duration-fast: 150ms;
  --duration-normal: 300ms;
  --easing-default: ease;

  /* --- Opacity --- */
  --opacity-ghost: 0.03;
  --opacity-faded: 0.2;
  --opacity-semi: 0.4;
  --opacity-glass: 0.8;
  --opacity-glass-nav: 0.9;

  /* --- Blur --- */
  --blur-md: 12px;
}


/* --------------------------------------------------------------------------
   2. Base / Reset
   -------------------------------------------------------------------------- */

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

body {
  font-family: var(--font-family-sans);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
  background-color: var(--color-bg-page);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  margin: 0;
}

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


/* --------------------------------------------------------------------------
   3. Typography
   -------------------------------------------------------------------------- */

h1, h2, h3, h4, h5, h6 {
  margin: 0;
  color: var(--color-text-primary);
}

/* Display / Hero (H1) */
.text-display {
  font-size: var(--font-size-6xl);
  font-weight: var(--font-weight-bold);
  letter-spacing: var(--letter-spacing-tight);
  line-height: var(--line-height-none);
}
@media (min-width: 768px) {
  .text-display {
    font-size: var(--font-size-8xl);
  }
}

/* Section Heading (H2) */
.text-heading {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
}
@media (min-width: 768px) {
  .text-heading {
    font-size: var(--font-size-5xl);
    line-height: var(--line-height-none);
  }
}

/* Large Section Heading — CTA variant */
.text-heading-lg {
  font-size: var(--font-size-4xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
}
@media (min-width: 768px) {
  .text-heading-lg {
    font-size: var(--font-size-6xl);
    line-height: var(--line-height-none);
  }
}

/* Card Heading (H3) */
.text-title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-snug);
}

/* Feature Card Heading (H3 large) */
.text-title-lg {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
}

/* Subtitle / Names (H4) */
.text-subtitle {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-snug);
}

/* Body text */
.text-body {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-normal);
  color: var(--color-text-secondary);
}

.text-body-lg {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-normal);
  color: var(--color-text-primary);
}

.text-body-relaxed {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-secondary);
}

/* Caption / Meta */
.text-caption {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-regular);
  color: var(--color-text-tertiary);
}

/* Overline / Badge */
.text-overline {
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  color: var(--color-primary-500);
}


/* --------------------------------------------------------------------------
   4. Links
   -------------------------------------------------------------------------- */

a {
  color: inherit;
  text-decoration: none;
  transition: color var(--duration-normal) var(--easing-default);
}

a:hover {
  color: var(--color-primary-500);
}

/* Focus visible for keyboard navigation */
a:focus-visible,
button:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
  border-radius: var(--radius-md);
}


/* --------------------------------------------------------------------------
   5. Buttons
   -------------------------------------------------------------------------- */

.btn-primary {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  background-color: var(--color-primary-500);
  color: var(--color-text-inverse);
  border: none;
  border-radius: var(--radius-full);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-family-sans);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-normal);
  cursor: pointer;
  transition: background-color var(--duration-normal) var(--easing-default);
  text-decoration: none;
}
.btn-primary:hover {
  background-color: var(--color-primary-600);
  color: var(--color-text-inverse);
}
.btn-primary:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}
.btn-primary:disabled,
.btn-primary[aria-disabled="true"] {
  opacity: 0.5;
  pointer-events: none;
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  background-color: var(--color-neutral-white);
  color: var(--color-text-primary);
  border: 1px solid var(--color-border-default);
  border-radius: var(--radius-full);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-family-sans);
  font-size: var(--font-size-base);
  font-weight: var(--font-weight-medium);
  line-height: var(--line-height-normal);
  cursor: pointer;
  transition: background-color var(--duration-normal) var(--easing-default);
  text-decoration: none;
}
.btn-outline:hover {
  background-color: #f9fafb;
  color: var(--color-text-primary);
}
.btn-outline:focus-visible {
  outline: 2px solid var(--color-primary-500);
  outline-offset: 2px;
}

/* Small button variant */
.btn-sm {
  font-size: var(--font-size-sm);
  padding: var(--space-2) var(--space-6);
}

/* Button arrow icon (olive circle with white chevron) */
.btn-arrow-icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 1.25rem;
  height: 1.25rem;
  background-color: var(--color-primary-500);
  color: var(--color-text-inverse);
  border-radius: var(--radius-full);
  padding: 0.25rem;
  flex-shrink: 0;
}


/* --------------------------------------------------------------------------
   6. Badge
   -------------------------------------------------------------------------- */

.badge {
  display: inline-block;
  background-color: var(--color-neutral-warm-150);
  color: var(--color-primary-500);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  font-size: var(--font-size-xs);
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: var(--letter-spacing-wide);
  margin-bottom: var(--space-4);
}

.badge--dark {
  background-color: var(--color-neutral-warm-300);
}


/* --------------------------------------------------------------------------
   7. Cards
   -------------------------------------------------------------------------- */

/* Service card */
.card-service {
  background-color: var(--color-neutral-warm-100);
  padding: var(--space-8);
  border-radius: var(--radius-3xl);
  display: flex;
  flex-direction: column;
  justify-content: flex-end;
  height: 100%;
}
.card-service__icon {
  margin-bottom: auto;
  padding-bottom: var(--space-12);
}
.card-service__icon svg {
  width: 2rem;
  height: 2rem;
  color: var(--color-primary-500);
}
.card-service__title {
  font-size: var(--font-size-xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-2);
}
.card-service__desc {
  font-size: var(--font-size-sm);
  color: var(--color-text-secondary);
}

/* Feature card */
.card-feature {
  padding: var(--space-12);
  border-radius: var(--radius-4xl);
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  min-height: 320px;
}
.card-feature--warm { background-color: var(--color-neutral-warm-100); }
.card-feature--teal { background-color: var(--color-accent-teal-bg); }
.card-feature--lavender { background-color: var(--color-accent-lavender-bg); }

.card-feature__icon {
  width: 2rem;
  height: 2rem;
  margin-bottom: var(--space-12);
}
.card-feature--warm .card-feature__icon { color: var(--color-primary-500); }
.card-feature--teal .card-feature__icon { color: var(--color-accent-teal-text); }
.card-feature--lavender .card-feature__icon { color: var(--color-text-secondary); }

.card-feature__headline {
  font-size: var(--font-size-2xl);
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--space-4);
  color: var(--color-text-primary);
}
.card-feature__sub {
  font-size: var(--font-size-sm);
  font-weight: var(--font-weight-medium);
  color: var(--color-text-tertiary);
}

/* Testimonial card */
.card-testimonial {
  background-color: var(--color-neutral-warm-200);
  padding: var(--space-10);
  border-radius: var(--radius-2xl);
  display: flex;
  flex-direction: column;
  text-align: left;
}
.card-testimonial__stars {
  display: flex;
  color: var(--color-text-primary);
  margin-bottom: var(--space-8);
}
.card-testimonial__stars svg {
  width: 1.25rem;
  height: 1.25rem;
}
.card-testimonial__quote {
  font-size: var(--font-size-lg);
  color: var(--color-text-secondary);
  margin-bottom: var(--space-12);
  flex-grow: 1;
  line-height: var(--line-height-relaxed);
}
.card-testimonial__author {
  display: flex;
  align-items: center;
  gap: var(--space-4);
}
.card-testimonial__avatar {
  width: 3rem;
  height: 3rem;
  border-radius: var(--radius-full);
  object-fit: cover;
}
.card-testimonial__name {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-medium);
}
.card-testimonial__role {
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
}

/* Mentor card */
.card-mentor__image {
  width: 100%;
  height: 20rem; /* h-80 */
  object-fit: cover;
  border-radius: var(--radius-3xl);
  margin-bottom: var(--space-4);
}
.card-mentor__name {
  font-size: var(--font-size-lg);
  font-weight: var(--font-weight-bold);
}
.card-mentor__role {
  font-size: var(--font-size-sm);
  color: var(--color-text-tertiary);
}


/* --------------------------------------------------------------------------
   8. FAQ Accordion
   -------------------------------------------------------------------------- */

.faq-item {
  border-radius: var(--radius-2xl);
  padding: var(--space-6);
  transition: all var(--duration-normal) var(--easing-default);
}
.faq-item--closed {
  background-color: var(--color-neutral-100);
}
.faq-item--closed:hover {
  background-color: #f3f4f6; /* gray-100 */
}
.faq-item--open {
  background-color: var(--color-neutral-white);
  border: 1px solid var(--color-border-default);
  box-shadow: var(--shadow-sm);
}

.faq-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}
.faq-title {
  font-size: var(--font-size-lg);
}
.faq-title--closed {
  font-weight: var(--font-weight-medium);
}
.faq-title--open {
  font-weight: var(--font-weight-bold);
}

.faq-icon {
  width: 1.25rem;
  height: 1.25rem;
  color: var(--color-text-tertiary);
  transition: transform var(--duration-normal) var(--easing-default);
  flex-shrink: 0;
}
.faq-icon--open {
  transform: rotate(180deg);
}

.faq-content {
  font-size: var(--font-size-sm);
  line-height: var(--line-height-relaxed);
  color: var(--color-text-secondary);
  overflow: hidden;
  transition: all var(--duration-normal) var(--easing-default);
}


/* --------------------------------------------------------------------------
   9. Layout Containers
   -------------------------------------------------------------------------- */

.container-sm  { max-width: var(--container-sm);  margin-left: auto; margin-right: auto; }
.container-md  { max-width: var(--container-md);  margin-left: auto; margin-right: auto; }
.container-2xl { max-width: var(--container-2xl); margin-left: auto; margin-right: auto; }
.container-3xl { max-width: var(--container-3xl); margin-left: auto; margin-right: auto; }
.container-4xl { max-width: var(--container-4xl); margin-left: auto; margin-right: auto; }
.container-6xl { max-width: var(--container-6xl); margin-left: auto; margin-right: auto; }
.container-7xl { max-width: var(--container-7xl); margin-left: auto; margin-right: auto; }


/* --------------------------------------------------------------------------
   10. Sections
   -------------------------------------------------------------------------- */

.section {
  padding: var(--space-24) var(--space-4);
}

.section--white {
  background-color: var(--color-bg-surface);
}

.section--gray {
  background-color: var(--color-bg-page);
}

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

.section--dark {
  background-color: var(--color-bg-dark);
  color: var(--color-text-inverse);
}

/* Section header pattern: badge + heading */
.section__header {
  text-align: center;
  margin-bottom: var(--space-16);
}
.section__header .badge {
  margin-bottom: var(--space-4);
}
.section__header .text-heading {
  margin-top: var(--space-4);
}


/* --------------------------------------------------------------------------
   11. Glass / Blur Effects
   -------------------------------------------------------------------------- */

.glass-nav {
  background-color: rgba(255, 255, 255, var(--opacity-glass-nav));
  backdrop-filter: blur(var(--blur-md));
  -webkit-backdrop-filter: blur(var(--blur-md));
}

.glass-card {
  background-color: rgba(255, 255, 255, var(--opacity-glass));
  backdrop-filter: blur(var(--blur-md));
  -webkit-backdrop-filter: blur(var(--blur-md));
}


/* --------------------------------------------------------------------------
   12. Utilities
   -------------------------------------------------------------------------- */

/* Progress bar */
.progress-bar {
  width: 100%;
  height: 0.375rem; /* h-1.5 */
  background-color: var(--color-gray-200);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.progress-bar__fill {
  height: 100%;
  background-color: var(--color-primary-500);
  border-radius: var(--radius-full);
}

/* Avatar stack */
.avatar-stack {
  display: flex;
}
.avatar-stack img {
  width: 2rem;
  height: 2rem;
  border-radius: var(--radius-full);
  border: 2px solid var(--color-neutral-white);
}
.avatar-stack img + img {
  margin-left: -0.5rem;
}

/* Play button */
.play-button {
  width: 4rem;
  height: 4rem;
  background-color: var(--color-neutral-white);
  border: none;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: var(--shadow-lg);
  cursor: pointer;
  transition: transform var(--duration-normal) var(--easing-default);
}
.play-button:hover {
  transform: scale(1.05);
}
.play-button svg {
  width: 1.5rem;
  height: 1.5rem;
  color: var(--color-primary-500);
  margin-left: 0.125rem; /* optical alignment */
}