:root {
  --color-primary: #0F766E;
  --color-primary-dark: #0B5A54;
  --color-accent: #14E8D4;
  --color-bg: #F8FAFA;
  --color-surface: #FFFFFF;
  --color-text: #1E293B;
  --color-text-muted: #5B6B7A;
  --color-border: #E2E8E7;
  --color-primary-tint: #E6F7F5;
  --color-primary-tint-hover: #D2EFEB;

  --radius-sm: 8px;
  --radius-md: 12px;
  --shadow-card: 0 1px 2px rgba(15, 23, 42, 0.04), 0 4px 12px rgba(15, 23, 42, 0.06);
  --shadow-card-hover: 0 4px 8px rgba(15, 23, 42, 0.06), 0 12px 24px rgba(15, 23, 42, 0.08);
}

* {
  box-sizing: border-box;
}

html, body {
  margin: 0;
  padding: 0;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.5;
  -webkit-font-smoothing: antialiased;
}

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

h1, h2, h3 {
  font-weight: 700;
  margin: 0 0 0.5em;
  letter-spacing: -0.01em;
}

p {
  margin: 0 0 1em;
  color: var(--color-text-muted);
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5em;
  padding: 0.65em 1.4em;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  font-family: inherit;
  font-size: 0.95rem;
  font-weight: 600;
  cursor: pointer;
  transition: background 0.15s ease, border-color 0.15s ease, transform 0.05s ease;
}

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

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

.btn--lg {
  padding: 0.85em 2em;
  font-size: 1.05rem;
}

.btn--ghost {
  background: transparent;
  border-color: var(--color-border);
  color: var(--color-text);
}

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

/* Shared header bits */
.site-header,
.app-header {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-border);
}

.site-header__inner,
.app-header__inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 1rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1.5rem;
}

.site-header__brand {
  display: flex;
  align-items: center;
}

.site-header__logo {
  height: 36px;
  display: block;
}

.site-header__links,
.app-header__links {
  display: flex;
  gap: 0.5rem;
  margin-left: auto;
}

.site-header__links a,
.app-header__links a {
  display: inline-flex;
  align-items: center;
  font-size: 0.85rem;
  font-weight: 500;
  color: var(--color-primary);
  background: var(--color-primary-tint);
  padding: 6px 14px;
  border-radius: 9999px;
  transition: background 0.15s ease;
}

.site-header__links a:hover,
.app-header__links a:hover {
  background: var(--color-primary-tint-hover);
}

/* Authenticated header */
.app-header__inner {
  flex-wrap: wrap;
}

.app-header__logo {
  height: 32px;
  display: block;
}

.app-header__user {
  display: flex;
  align-items: center;
  gap: 1rem;
}

.app-header__user-info {
  display: flex;
  flex-direction: column;
  text-align: right;
  line-height: 1.3;
}

.app-header__user-name {
  font-weight: 600;
  font-size: 0.9rem;
}

.app-header__user-email {
  font-size: 0.8rem;
  color: var(--color-text-muted);
}

.app-header__logout-form {
  margin: 0;
}

/* Public landing page */
.hero {
  max-width: 720px;
  margin: 0 auto;
  padding: 6rem 1.5rem 4rem;
  text-align: center;
}

.hero h1 {
  font-size: 2.25rem;
}

.hero p {
  font-size: 1.1rem;
  margin-bottom: 2rem;
}

.site-footer {
  padding: 2rem 1.5rem;
  text-align: center;
  color: var(--color-text-muted);
  font-size: 0.85rem;
}

/* Authenticated app body */
.app-main {
  max-width: 1120px;
  margin: 0 auto;
  padding: 2.5rem 1.5rem 4rem;
}

.workspace-section__title {
  font-size: 1.25rem;
  margin-bottom: 1.25rem;
}

.tile-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(160px, 1fr));
  gap: 1rem;
}

.tile {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-card);
  padding: 1.5rem 1rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.75rem;
  text-align: center;
  color: var(--color-text);
  transition: box-shadow 0.15s ease, transform 0.15s ease, border-color 0.15s ease;
}

.tile:hover {
  box-shadow: var(--shadow-card-hover);
  border-color: var(--color-accent);
  transform: translateY(-2px);
}

.tile__icon {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(20, 232, 212, 0.14);
  color: var(--color-primary);
}

.tile__icon svg {
  width: 22px;
  height: 22px;
}

.tile__label {
  font-size: 0.9rem;
  font-weight: 600;
}

@media (max-width: 480px) {
  .app-header__inner {
    justify-content: center;
    text-align: center;
  }

  .app-header__user-info {
    text-align: left;
  }
}