/* ==========================================================================
   Design System — Carma Labs
   ========================================================================== */

:root {
  --color-primary: #1A3C2E;
  --color-primary-dark: #142f24;
  --color-bg: #FFFFFF;
  --color-section: #F9F7F4;
  --color-accent: #C8A94A;
  --color-accent-hover: #b8993f;
  --color-text: #1A3C2E;
  --color-text-muted: #5a6b63;
  --color-border: #e8e4df;

  --font-family: "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  --font-weight-regular: 400;
  --font-weight-medium: 500;
  --font-weight-semibold: 600;

  --header-height: 72px;
  --container-max: 1120px;
  --container-padding: 1.5rem;
  --transition: 0.2s ease;
}

/* Reset & Base
   ========================================================================== */

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

html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-family);
  font-weight: var(--font-weight-regular);
  font-size: 1rem;
  line-height: 1.6;
  color: var(--color-text);
  background-color: var(--color-bg);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

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

a {
  color: inherit;
  text-decoration: none;
}

ul {
  list-style: none;
}

main {
  flex: 1;
}

/* Typography
   ========================================================================== */

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--font-weight-semibold);
  line-height: 1.25;
  color: var(--color-primary);
}

h1 { font-size: clamp(2rem, 5vw, 3rem); }
h2 { font-size: clamp(1.5rem, 3vw, 2rem); }
h3 { font-size: clamp(1.125rem, 2vw, 1.375rem); }

p {
  color: var(--color-text-muted);
}

/* Layout
   ========================================================================== */

.container {
  width: 100%;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.section {
  padding-block: 5rem;
}

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

/* Buttons
   ========================================================================== */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  padding: 0.75rem 1.5rem;
  font-family: var(--font-family);
  font-size: 0.9375rem;
  font-weight: var(--font-weight-medium);
  line-height: 1;
  border: none;
  border-radius: 6px;
  cursor: pointer;
  transition: background-color var(--transition), color var(--transition), box-shadow var(--transition);
}

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

.btn--primary:hover {
  background-color: var(--color-accent-hover);
}

.btn--outline {
  background-color: transparent;
  color: var(--color-primary);
  border: 1.5px solid var(--color-primary);
}

.btn--outline:hover {
  background-color: var(--color-primary);
  color: var(--color-bg);
}

.btn--green {
  background-color: var(--color-primary);
  color: var(--color-bg);
}

.btn--green:hover {
  background-color: var(--color-primary-dark);
}

.btn--white {
  background-color: var(--color-bg);
  color: var(--color-primary);
}

.btn--white:hover {
  background-color: var(--color-section);
}

/* Home — Hero
   ========================================================================== */

.hero {
  padding-block: 5rem 4rem;
}

.hero__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.hero__title {
  margin-bottom: 1.25rem;
  letter-spacing: -0.02em;
}

.hero__subtext {
  font-size: 1.125rem;
  line-height: 1.7;
  margin-bottom: 2rem;
  max-width: 32rem;
}

.hero__actions {
  display: flex;
  flex-wrap: wrap;
  gap: 1rem;
}

.hero__image {
  aspect-ratio: 4 / 3;
  background-color: var(--color-bg);
  border: 2px dashed var(--color-border);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
}

.hero__image-label {
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

/* Home — Stats Bar
   ========================================================================== */

.stats-bar {
  background-color: #e8f0ec;
  padding-block: 2.5rem;
}

.stats-bar__inner {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
  text-align: center;
}

.stat__number {
  display: block;
  font-size: clamp(1.75rem, 3vw, 2.25rem);
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  line-height: 1.2;
  margin-bottom: 0.25rem;
}

.stat__label {
  font-size: 0.9375rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
}

/* Home — Section Heading
   ========================================================================== */

.section-heading {
  text-align: center;
  margin-bottom: 3rem;
  letter-spacing: -0.02em;
}

/* Home — Course Cards
   ========================================================================== */

.course-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.5rem;
}

.course-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 10px;
  padding: 1.75rem;
  display: flex;
  flex-direction: column;
  transition: border-color var(--transition), box-shadow var(--transition), transform var(--transition);
}

.course-card:hover:not(.is-hidden) {
  border-color: var(--color-primary);
  box-shadow: 0 8px 24px rgba(26, 60, 46, 0.08);
  transform: translateY(-2px);
}

.course-card__tag {
  display: inline-block;
  font-size: 0.75rem;
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-primary);
  background-color: #e8f0ec;
  padding: 0.25rem 0.625rem;
  border-radius: 4px;
  margin-bottom: 1rem;
  width: fit-content;
}

.course-card__title {
  margin-bottom: 0.75rem;
}

.course-card__desc {
  font-size: 0.9375rem;
  line-height: 1.6;
  flex: 1;
  margin-bottom: 1.5rem;
}

.course-card__footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.course-card__duration {
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
}

.course-card__link {
  font-size: 0.875rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  transition: color var(--transition);
}

.course-card__link:hover {
  color: var(--color-accent-hover);
}

.btn--block {
  width: 100%;
}

/* Courses Page
   ========================================================================== */

.page-hero {
  padding-block: 3rem 2.5rem;
}

.page-hero__inner {
  max-width: 40rem;
}

.page-hero__title {
  margin-bottom: 0.75rem;
  letter-spacing: -0.02em;
}

.page-hero__subtext {
  font-size: 1.0625rem;
  line-height: 1.65;
}

.filter-bar {
  display: flex;
  flex-wrap: wrap;
  gap: 0.625rem;
  margin-bottom: 2.5rem;
}

.filter-btn {
  padding: 0.5rem 1rem;
  font-family: var(--font-family);
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 100px;
  cursor: pointer;
  transition: color var(--transition), background-color var(--transition), border-color var(--transition);
}

.filter-btn:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

.filter-btn.is-active {
  color: var(--color-bg);
  background-color: var(--color-primary);
  border-color: var(--color-primary);
}

.course-grid--catalog {
  align-items: stretch;
}

.course-grid--catalog .course-card {
  height: 100%;
  transition:
    opacity 0.35s ease,
    transform 0.35s ease,
    visibility 0.35s ease,
    max-height 0.35s ease,
    padding 0.35s ease,
    margin 0.35s ease,
    border-width 0.35s ease,
    border-color var(--transition),
    box-shadow var(--transition);
}

.course-grid--catalog .course-card__desc {
  flex: 1;
  margin-bottom: 1rem;
}

.course-grid--catalog .course-card__meta {
  margin-bottom: 0;
}

.course-grid--catalog .course-card.is-hidden {
  opacity: 0;
  transform: scale(0.96);
  visibility: hidden;
  pointer-events: none;
  max-height: 0;
  min-height: 0;
  height: 0;
  padding: 0;
  margin: 0;
  border-width: 0;
  overflow: hidden;
}

.course-card__meta {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}

.level-badge {
  font-size: 0.75rem;
  font-weight: var(--font-weight-semibold);
  padding: 0.2rem 0.5rem;
  border-radius: 4px;
  text-transform: capitalize;
}

.level-badge--beginner {
  color: #1a5c3a;
  background-color: #e8f0ec;
}

.level-badge--intermediate {
  color: #6b5520;
  background-color: #f5f0e0;
}

.level-badge--advanced {
  color: #4a2030;
  background-color: #f0e8ea;
}

.course-card__pricing {
  display: flex;
  flex-direction: column;
  gap: 0.875rem;
  margin-top: auto;
  padding-top: 1rem;
  border-top: 1px solid var(--color-border);
}

.course-card__price {
  font-size: 1.25rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
}

.course-card__price--free {
  color: #1a5c3a;
}

/* About Page
   ========================================================================== */

.page-hero__inner--centered {
  max-width: 42rem;
  margin-inline: auto;
  text-align: center;
}

.section-heading--left {
  text-align: left;
  margin-bottom: 1.5rem;
}

.our-story__inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 3rem;
  align-items: center;
}

.our-story__content p {
  margin-bottom: 1rem;
  line-height: 1.7;
}

.our-story__content p:last-child {
  margin-bottom: 0;
}

.our-story__image,
.placeholder-label {
  display: flex;
  align-items: center;
  justify-content: center;
}

.our-story__image {
  aspect-ratio: 4 / 3;
  background-color: var(--color-section);
  border: 2px dashed var(--color-border);
  border-radius: 12px;
}

.placeholder-label {
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.02em;
}

.team-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2rem;
}

.team-card {
  text-align: center;
}

.team-card__photo {
  width: 120px;
  height: 120px;
  border-radius: 50%;
  background-color: var(--color-border);
  margin-inline: auto;
  margin-bottom: 1.25rem;
}

.team-card__name {
  margin-bottom: 0.25rem;
}

.team-card__title {
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  margin-bottom: 0.75rem;
}

.team-card__bio {
  font-size: 0.9375rem;
  line-height: 1.6;
}

.partners-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 1.5rem;
  align-items: center;
}

.partner-logo {
  display: flex;
  align-items: center;
  justify-content: center;
  height: 80px;
  background-color: var(--color-section);
  border: 1px solid var(--color-border);
  border-radius: 8px;
  filter: grayscale(100%);
  opacity: 0.7;
  transition: opacity var(--transition);
}

.partner-logo:hover {
  opacity: 1;
}

.partner-logo span {
  font-size: 0.8125rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Contact Page
   ========================================================================== */

.contact-page__heading {
  margin-bottom: 2.5rem;
  letter-spacing: -0.02em;
}

.contact-layout {
  display: grid;
  grid-template-columns: 1.2fr 0.8fr;
  gap: 4rem;
  align-items: start;
}

.contact-form {
  display: flex;
  flex-direction: column;
  gap: 1.25rem;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.375rem;
}

.form-group label {
  font-size: 0.875rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
}

.form-group input,
.form-group textarea {
  font-family: var(--font-family);
  font-size: 0.9375rem;
  padding: 0.75rem 1rem;
  border: 1px solid var(--color-border);
  border-radius: 6px;
  background-color: var(--color-bg);
  color: var(--color-text);
  transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(26, 60, 46, 0.1);
}

.form-group input.is-invalid,
.form-group textarea.is-invalid {
  border-color: #c0392b;
}

.form-group textarea {
  resize: vertical;
  min-height: 120px;
}

.form-error {
  font-size: 0.8125rem;
  color: #c0392b;
  min-height: 1.25rem;
}

.form-success {
  font-size: 0.9375rem;
  font-weight: var(--font-weight-medium);
  color: #1a5c3a;
  background-color: #e8f0ec;
  padding: 0.875rem 1rem;
  border-radius: 6px;
  margin-top: 0.25rem;
}

.contact-details {
  background-color: var(--color-section);
  padding: 2rem;
  border-radius: 10px;
}

.contact-details__title {
  font-size: 1.125rem;
  margin-bottom: 1.5rem;
}

.contact-details__item {
  margin-bottom: 1.25rem;
}

.contact-details__label {
  display: block;
  font-size: 0.75rem;
  font-weight: var(--font-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.04em;
  color: var(--color-text-muted);
  margin-bottom: 0.25rem;
}

.contact-details__item a {
  font-size: 0.9375rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-primary);
  transition: color var(--transition);
}

.contact-details__item a:hover {
  color: var(--color-accent-hover);
}

.contact-details__note {
  font-size: 0.9375rem;
  line-height: 1.65;
  margin-top: 1.5rem;
  padding-top: 1.5rem;
  border-top: 1px solid var(--color-border);
}

/* Home — Why Us
   ========================================================================== */

.why-us__grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 2.5rem;
}

.why-us__item {
  text-align: center;
}

.why-us__icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  width: 56px;
  height: 56px;
  background-color: var(--color-bg);
  border-radius: 12px;
  color: var(--color-primary);
  margin-bottom: 1.25rem;
}

.why-us__icon svg {
  width: 28px;
  height: 28px;
}

.why-us__title {
  margin-bottom: 0.75rem;
}

.why-us__text {
  font-size: 0.9375rem;
  line-height: 1.65;
  max-width: 20rem;
  margin-inline: auto;
}

/* Home — CTA Banner
   ========================================================================== */

.cta-banner {
  background-color: var(--color-primary);
  padding-block: 4rem;
}

.cta-banner__inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  gap: 1.5rem;
}

.cta-banner__title {
  color: var(--color-bg);
  font-size: clamp(1.5rem, 3vw, 2rem);
  letter-spacing: -0.02em;
}

/* Header & Navigation
   ========================================================================== */

.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background-color: var(--color-bg);
  border-bottom: 1px solid var(--color-border);
  height: var(--header-height);
}

.nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--header-height);
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.logo {
  font-size: 1.125rem;
  font-weight: var(--font-weight-semibold);
  color: var(--color-primary);
  letter-spacing: -0.02em;
  flex-shrink: 0;
}

.logo:hover {
  opacity: 0.85;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 2rem;
}

.nav-links a {
  font-size: 0.9375rem;
  font-weight: var(--font-weight-medium);
  color: var(--color-text-muted);
  padding-bottom: 2px;
  border-bottom: 2px solid transparent;
  transition: color var(--transition), border-color var(--transition);
}

.nav-links a:hover {
  color: var(--color-primary);
}

.nav-links a.is-active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

/* Hamburger Toggle
   ========================================================================== */

.nav-toggle {
  display: none;
  flex-direction: column;
  justify-content: center;
  gap: 5px;
  width: 40px;
  height: 40px;
  padding: 8px;
  background: none;
  border: none;
  cursor: pointer;
  border-radius: 6px;
  transition: background-color var(--transition);
}

.nav-toggle:hover {
  background-color: var(--color-section);
}

.nav-toggle-bar {
  display: block;
  width: 100%;
  height: 2px;
  background-color: var(--color-primary);
  border-radius: 1px;
  transition: transform var(--transition), opacity var(--transition);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(1) {
  transform: translateY(7px) rotate(45deg);
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(2) {
  opacity: 0;
}

.nav-toggle[aria-expanded="true"] .nav-toggle-bar:nth-child(3) {
  transform: translateY(-7px) rotate(-45deg);
}

/* Footer
   ========================================================================== */

.site-footer {
  background-color: var(--color-primary);
  color: rgba(255, 255, 255, 0.85);
  padding-block: 2rem;
}

.footer-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1.5rem;
  max-width: var(--container-max);
  margin-inline: auto;
  padding-inline: var(--container-padding);
}

.copyright {
  font-size: 0.875rem;
  color: rgba(255, 255, 255, 0.7);
}

.social-links {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.social-links a {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  color: rgba(255, 255, 255, 0.85);
  background-color: rgba(255, 255, 255, 0.1);
  transition: background-color var(--transition), color var(--transition);
}

.social-links a:hover {
  background-color: rgba(255, 255, 255, 0.2);
  color: #fff;
}

.social-links svg {
  width: 18px;
  height: 18px;
  fill: currentColor;
}

/* Mobile Navigation
   ========================================================================== */

@media (max-width: 767px) {
  .nav-toggle {
    display: flex;
  }

  .nav-links {
    position: fixed;
    top: var(--header-height);
    left: 0;
    right: 0;
    flex-direction: column;
    align-items: stretch;
    gap: 0;
    background-color: var(--color-bg);
    border-bottom: 1px solid var(--color-border);
    padding-block: 0.5rem;
    transform: translateY(-100%);
    opacity: 0;
    visibility: hidden;
    transition: transform var(--transition), opacity var(--transition), visibility var(--transition);
  }

  .nav-links.is-open {
    transform: translateY(0);
    opacity: 1;
    visibility: visible;
  }

  .nav-links li {
    border-bottom: 1px solid var(--color-border);
  }

  .nav-links li:last-child {
    border-bottom: none;
  }

  .nav-links a {
    display: block;
    padding: 1rem var(--container-padding);
    border-bottom: none;
  }

  .nav-links a.is-active {
    background-color: var(--color-section);
    border-left: 3px solid var(--color-primary);
    border-bottom: none;
    padding-left: calc(var(--container-padding) - 3px);
  }

  .footer-inner {
    flex-direction: column;
    text-align: center;
  }

  .hero__inner {
    grid-template-columns: 1fr;
  }

  .hero__image {
    order: -1;
    max-width: 28rem;
    margin-inline: auto;
    width: 100%;
  }

  .stats-bar__inner {
    grid-template-columns: 1fr;
    gap: 1.5rem;
  }

  .course-grid {
    grid-template-columns: 1fr;
  }

  .why-us__grid {
    grid-template-columns: 1fr;
    gap: 2rem;
  }

  .our-story__inner {
    grid-template-columns: 1fr;
  }

  .our-story__image {
    max-width: 28rem;
    margin-inline: auto;
    width: 100%;
  }

  .team-grid {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }

  .partners-grid {
    grid-template-columns: repeat(2, 1fr);
  }

  .contact-layout {
    grid-template-columns: 1fr;
    gap: 2.5rem;
  }
}

@media (max-width: 1024px) {
  .course-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}