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

body {
  font-family: var(--font-body);
  background-color: var(--color-bg);
  color: var(--color-text);
  line-height: 1.6;
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  -webkit-font-smoothing: antialiased;
}

/* --- Header --- */
.site-header {
  background: color-mix(in srgb, var(--color-bg) 94%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-line);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0.85rem 1.75rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
}

.brand {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 1.15rem;
  color: var(--color-text);
  text-decoration: none;
  letter-spacing: 0.04em;
  transition: color var(--transition-fast);
}

.brand:hover {
  color: var(--color-matcha-light);
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 1.25rem;
}

.nav-link {
  color: var(--color-text-muted);
  text-decoration: none;
  font-size: 0.875rem;
  font-weight: 500;
  letter-spacing: 0.03em;
  padding: 0.4rem 0.75rem;
  border-radius: var(--radius-sm);
  transition: color var(--transition-fast), background var(--transition-fast);
}

.nav-link:hover, .nav-link.active {
  color: var(--color-text);
  background: var(--color-surface);
}

.nav-link.active {
  color: var(--color-matcha);
  font-weight: 600;
}

.btn-logout {
  background: transparent;
  border: 1px solid var(--color-line);
  color: var(--color-text-muted);
  padding: 0.35rem 0.8rem;
  border-radius: var(--radius-sm);
  font-size: 0.82rem;
  font-family: var(--font-body);
  cursor: pointer;
  transition: all var(--transition-fast);
}

.btn-logout:hover {
  background: var(--color-danger-bg);
  color: var(--color-danger);
  border-color: var(--color-danger-border);
}

/* --- Main Container --- */
main {
  max-width: 1200px;
  width: 100%;
  margin: 1.75rem auto;
  padding: 0 1.5rem 5rem;
  flex: 1;
}

/* --- Forms & Inputs --- */
input, select, textarea {
  font-family: var(--font-body);
  font-size: 0.92rem;
  padding: 0.65rem 0.85rem;
  border: 1px solid var(--color-line);
  border-radius: var(--radius-sm);
  background: var(--color-surface);
  color: var(--color-text);
  outline: none;
  transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
  width: 100%;
}

input::placeholder, textarea::placeholder {
  color: var(--color-text-dim);
}

input:focus, select:focus, textarea:focus {
  border-color: var(--color-matcha);
  box-shadow: 0 0 0 3px color-mix(in srgb, var(--color-matcha) 18%, transparent);
}

select {
  cursor: pointer;
}

textarea {
  resize: vertical;
  min-height: 80px;
}

/* --- Buttons --- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.45rem;
  font-family: var(--font-display);
  font-size: 0.875rem;
  font-weight: 500;
  padding: 0.55rem 1.1rem;
  border-radius: var(--radius-sm);
  border: 1px solid transparent;
  cursor: pointer;
  transition: all var(--transition-fast);
  text-decoration: none;
  white-space: nowrap;
  letter-spacing: 0.02em;
  user-select: none;
}

.btn svg {
  width: 15px;
  height: 15px;
  stroke-width: 2;
}

.btn-primary {
  background: var(--color-matcha);
  color: var(--color-bg);
  font-weight: 600;
}

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

.btn-secondary {
  background: var(--color-surface);
  border-color: var(--color-line);
  color: var(--color-text);
}

.btn-secondary:hover {
  background: var(--color-surface-hover);
  border-color: var(--color-line-strong);
}

.btn-danger {
  background: var(--color-danger-bg);
  color: var(--color-danger);
  border-color: var(--color-danger-border);
}

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

.btn-sm {
  padding: 0.35rem 0.65rem;
  font-size: 0.78rem;
}

.btn-icon {
  padding: 0.35rem 0.5rem;
  background: var(--color-surface-2);
  border: 1px solid var(--color-line);
  color: var(--color-text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  gap: 0.35rem;
  font-size: 0.75rem;
  transition: all var(--transition-fast);
}

.btn-icon:hover {
  color: var(--color-text);
  border-color: var(--color-line-strong);
  background: var(--color-surface-hover);
}

.icon {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  vertical-align: middle;
  width: 14px;
  height: 14px;
  stroke: currentColor;
  fill: none;
}

.form-group {
  display: flex;
  flex-direction: column;
  gap: 0.35rem;
}

.form-label {
  font-size: 0.8rem;
  font-weight: 600;
  color: var(--color-text-muted);
  letter-spacing: 0.02em;
}

.form-row {
  display: flex;
  gap: 0.75rem;
}

/* --- Layout Grids --- */
.grid-2 {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: 1.5rem;
  align-items: start;
}

@media (max-width: 960px) {
  .grid-2 {
    grid-template-columns: 1fr;
  }
}