/* Gym Notes Blog — Material 3 Dark Theme with Teal Accent */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600;700&display=swap');

:root {
  --surface: #121316;
  --surface-container-low: #1A1C1E;
  --surface-container-high: #242629;
  --surface-container-highest: #333639;
  --outline-variant: #43474E;
  --on-surface: #E0E2E6;
  --on-surface-variant: #9A9DA3;
  --primary: #80CBC4;
  --on-primary: #003734;
  --primary-container: #00504B;
  --on-primary-container: #A7F3EC;
  --error: #FFB4AB;

  --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

  --content-max-width: 720px;
  --header-height: 56px;
}

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

html {
  font-size: 16px;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

body {
  font-family: var(--font-family);
  background-color: var(--surface);
  color: var(--on-surface);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

a {
  color: var(--primary);
  text-decoration: none;
}

a:hover {
  text-decoration: underline;
}

/* ── Header ── */

.site-header {
  background-color: var(--surface-container-low);
  border-bottom: 1px solid var(--outline-variant);
  height: var(--header-height);
  display: flex;
  align-items: center;
  padding: 0 24px;
  position: sticky;
  top: 0;
  z-index: 10;
}

.site-header__title {
  font-size: 1.125rem;
  font-weight: 600;
  color: var(--on-surface);
  text-decoration: none;
}

.site-header__title:hover {
  text-decoration: none;
  color: var(--primary);
}

/* ── Main Content ── */

main {
  flex: 1;
  width: 100%;
  max-width: var(--content-max-width);
  margin: 0 auto;
  padding: 32px 24px 64px;
}

/* ── Blog Index ── */

.blog-index h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 8px;
}

.blog-index__subtitle {
  color: var(--on-surface-variant);
  margin-bottom: 32px;
}

.article-card {
  background-color: var(--surface-container-low);
  border: 1px solid var(--outline-variant);
  border-radius: 12px;
  padding: 24px;
  margin-bottom: 16px;
  transition: border-color 0.15s ease;
}

.article-card:hover {
  border-color: var(--primary);
}

.article-card__title {
  font-size: 1.25rem;
  font-weight: 600;
  margin-bottom: 4px;
}

.article-card__title a {
  color: var(--on-surface);
}

.article-card__title a:hover {
  color: var(--primary);
  text-decoration: none;
}

.article-card__date {
  font-size: 0.8125rem;
  color: var(--on-surface-variant);
  margin-bottom: 12px;
}

.article-card__snippet {
  color: var(--on-surface-variant);
  line-height: 1.5;
}

/* ── Article Page ── */

.article h1 {
  font-size: 1.75rem;
  font-weight: 700;
  margin-bottom: 4px;
  line-height: 1.3;
}

.article__date {
  color: var(--on-surface-variant);
  margin-bottom: 32px;
}

.article__body h2 {
  font-size: 1.25rem;
  font-weight: 600;
  margin-top: 32px;
  margin-bottom: 12px;
  color: var(--primary);
}

.article__body p {
  margin-bottom: 16px;
}

.article__body ul,
.article__body ol {
  margin-bottom: 16px;
  padding-left: 24px;
}

.article__body li {
  margin-bottom: 8px;
}

.article__body strong {
  font-weight: 600;
}

.article__body a {
  text-decoration: underline;
}

/* ── Footer ── */

.site-footer {
  background-color: var(--surface-container-low);
  border-top: 1px solid var(--outline-variant);
  padding: 40px 24px;
  text-align: center;
}

.footer-inner {
  max-width: 480px;
  margin: 0 auto;
}

.footer-heading {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
}

/* Email signup form */

.signup-form {
  display: flex;
  gap: 8px;
  margin-bottom: 32px;
}

.signup-form__input {
  flex: 1;
  padding: 10px 14px;
  font-size: 0.875rem;
  font-family: var(--font-family);
  background-color: var(--surface-container-highest);
  border: 1px solid var(--outline-variant);
  border-radius: 8px;
  color: var(--on-surface);
  outline: none;
  transition: border-color 0.15s ease;
}

.signup-form__input::placeholder {
  color: var(--on-surface-variant);
}

.signup-form__input:focus {
  border-color: var(--primary);
}

.signup-form__button {
  padding: 10px 20px;
  font-size: 0.875rem;
  font-weight: 600;
  font-family: var(--font-family);
  background-color: var(--primary-container);
  color: var(--on-primary-container);
  border: none;
  border-radius: 8px;
  cursor: pointer;
  white-space: nowrap;
  transition: background-color 0.15s ease, opacity 0.15s ease;
}

.signup-form__button:hover {
  opacity: 0.9;
}

.signup-form__button:disabled {
  opacity: 0.5;
  cursor: not-allowed;
}

.signup-feedback {
  font-size: 0.8125rem;
  margin-bottom: 16px;
  min-height: 20px;
}

.signup-feedback--success {
  color: var(--primary);
}

.signup-feedback--error {
  color: var(--error);
}

/* Footer divider */

.footer-divider {
  border: none;
  border-top: 1px solid var(--outline-variant);
  margin: 0 auto 32px;
  width: 100%;
}

/* Blog link */

.footer-blog-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  font-weight: 500;
  color: var(--on-surface-variant);
  margin-bottom: 24px;
}

.footer-blog-link:hover {
  color: var(--primary);
}

/* Store buttons */

.footer-store-heading {
  font-size: 1rem;
  font-weight: 600;
  margin-bottom: 16px;
}

.store-buttons {
  display: flex;
  gap: 12px;
  justify-content: center;
  flex-wrap: wrap;
}

.store-button {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 18px;
  font-size: 0.8125rem;
  font-weight: 500;
  font-family: var(--font-family);
  background: transparent;
  color: var(--on-surface-variant);
  border: 1px solid var(--outline-variant);
  border-radius: 8px;
  cursor: default;
  opacity: 0.6;
}

.store-button__coming-soon {
  font-size: 0.6875rem;
  color: var(--on-surface-variant);
  opacity: 0.7;
}

/* ── Responsive ── */

@media (max-width: 480px) {
  main {
    padding: 24px 16px 48px;
  }

  .site-header {
    padding: 0 16px;
  }

  .signup-form {
    flex-direction: column;
  }

  .store-buttons {
    flex-direction: column;
    align-items: center;
  }
}