:root {
  --teal: #5CBFB3;
  --teal-dark: #4AA89D;
  --navy: #1A1E2A;
  --navy-light: #252A3A;
  --sand: #F5F0E8;
  --sand-dark: #E8E0D2;
  --white: #FFFFFF;
  --gray-100: #F7F7F7;
  --gray-200: #E5E5E5;
  --gray-300: #D4D4D4;
  --gray-400: #A3A3A3;
  --gray-500: #737373;
  --gray-600: #525252;
  --gray-700: #404040;
  --text: #1A1E2A;
  --text-muted: #525252;
  --bg: #F5F0E8;
  --card-bg: #FFFFFF;
  --border: #E5E5E5;
  --error: #DC2626;
  --success: #16A34A;
  --radius: 8px;
  --radius-lg: 12px;
  --shadow: 0 1px 3px rgba(26,30,42,0.08), 0 1px 2px rgba(26,30,42,0.06);
  --shadow-lg: 0 4px 12px rgba(26,30,42,0.1);
}

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

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

h1, h2, h3 {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-weight: 500;
}

.screen {
  display: none;
}

.screen.active {
  display: block;
}

.view {
  display: none;
}

.view.active {
  display: block;
}

/* --- Login --- */

#login-screen {
  min-height: 100vh;
  display: none;
  place-items: center;
  background: var(--navy);
}

#login-screen.active {
  display: grid;
}

.login-card {
  background: var(--white);
  border-radius: var(--radius-lg);
  padding: 3rem 2.5rem;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow-lg);
}

.login-logo {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 2.5rem;
  font-weight: 600;
  color: var(--teal);
  text-align: center;
  letter-spacing: 0.05em;
}

.login-title {
  text-align: center;
  font-size: 1.5rem;
  margin-top: 0.25rem;
  color: var(--navy);
}

.login-subtitle {
  text-align: center;
  color: var(--gray-500);
  font-size: 0.875rem;
  margin-bottom: 2rem;
}

/* --- Forms --- */

.form-group {
  margin-bottom: 1rem;
}

.form-group label {
  display: block;
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--gray-600);
  margin-bottom: 0.375rem;
}

input[type="email"],
input[type="password"],
input[type="text"],
textarea,
select {
  width: 100%;
  padding: 0.625rem 0.75rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.875rem;
  color: var(--text);
  background: var(--white);
  transition: border-color 0.15s;
}

input:focus,
textarea:focus,
select:focus {
  outline: none;
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(92,191,179,0.15);
}

textarea {
  resize: vertical;
}

.error-text {
  color: var(--error);
  font-size: 0.8125rem;
  margin-top: 0.75rem;
}

.info-text {
  color: var(--gray-600);
  font-size: 0.875rem;
  margin-bottom: 1.25rem;
}

/* --- Buttons --- */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.375rem;
  padding: 0.625rem 1.25rem;
  border: none;
  border-radius: var(--radius);
  font-family: inherit;
  font-size: 0.875rem;
  font-weight: 500;
  cursor: pointer;
  transition: all 0.15s;
}

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

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

.btn-primary:hover:not(:disabled) {
  background: var(--teal-dark);
}

.btn-outline {
  background: transparent;
  border: 1px solid var(--border);
  color: var(--text);
}

.btn-outline:hover:not(:disabled) {
  background: var(--gray-100);
}

.btn-sm {
  padding: 0.375rem 0.75rem;
  font-size: 0.8125rem;
}

.btn-full {
  width: 100%;
}

/* --- Navigation --- */

.top-nav {
  display: flex;
  align-items: center;
  gap: 1rem;
  padding: 0.75rem 1.5rem;
  background: var(--navy);
  color: var(--white);
  position: sticky;
  top: 0;
  z-index: 100;
}

.nav-brand {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 1.25rem;
  font-weight: 600;
  color: var(--teal);
  letter-spacing: 0.03em;
  margin-right: auto;
}

.nav-links {
  display: flex;
  gap: 0.25rem;
}

.nav-btn {
  background: transparent;
  border: none;
  color: rgba(255,255,255,0.6);
  font-family: inherit;
  font-size: 0.8125rem;
  font-weight: 500;
  padding: 0.5rem 0.75rem;
  border-radius: var(--radius);
  cursor: pointer;
  transition: all 0.15s;
}

.nav-btn:hover {
  color: var(--white);
  background: rgba(255,255,255,0.08);
}

.nav-btn.active {
  color: var(--white);
  background: rgba(92,191,179,0.2);
}

#logout-btn {
  border-color: rgba(255,255,255,0.2);
  color: rgba(255,255,255,0.7);
  margin-left: 0.5rem;
}

#logout-btn:hover {
  background: rgba(255,255,255,0.08);
  color: var(--white);
}

/* --- Subscribers --- */

.view-header {
  padding: 1.5rem;
}

.view-header h2 {
  font-size: 1.75rem;
  color: var(--navy);
}

.stats-row {
  display: flex;
  gap: 1rem;
  margin-top: 1rem;
}

.stat-card {
  background: var(--card-bg);
  border-radius: var(--radius);
  padding: 1rem 1.5rem;
  box-shadow: var(--shadow);
  display: flex;
  flex-direction: column;
  min-width: 120px;
}

.stat-num {
  font-family: 'Cormorant Garamond', Georgia, serif;
  font-size: 2rem;
  font-weight: 600;
  color: var(--teal);
  line-height: 1.1;
}

.stat-label {
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.25rem;
}

.filter-row {
  display: flex;
  gap: 0.75rem;
  padding: 0 1.5rem 1rem;
  align-items: center;
}

.filter-row select {
  width: auto;
  min-width: 160px;
}

.table-wrap {
  padding: 0 1.5rem 1.5rem;
  overflow-x: auto;
}

table {
  width: 100%;
  border-collapse: collapse;
  background: var(--card-bg);
  border-radius: var(--radius);
  overflow: hidden;
  box-shadow: var(--shadow);
}

th {
  text-align: left;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--gray-500);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  padding: 0.75rem 1rem;
  border-bottom: 1px solid var(--border);
  background: var(--gray-100);
}

td {
  padding: 0.75rem 1rem;
  font-size: 0.875rem;
  border-bottom: 1px solid var(--border);
}

tr:last-child td {
  border-bottom: none;
}

.empty-state {
  text-align: center;
  color: var(--gray-400);
  padding: 2rem 1rem;
}

.sub-badge {
  display: inline-block;
  padding: 0.125rem 0.5rem;
  border-radius: 999px;
  font-size: 0.75rem;
  font-weight: 500;
  margin-right: 0.25rem;
}

.sub-badge.blog {
  background: rgba(92,191,179,0.15);
  color: var(--teal-dark);
}

.sub-badge.marketing {
  background: rgba(26,30,42,0.08);
  color: var(--navy);
}

/* --- Compose --- */

.compose-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1.5rem;
  padding: 0 1.5rem 1.5rem;
}

.compose-input,
.compose-preview {
  background: var(--card-bg);
  border-radius: var(--radius-lg);
  padding: 1.5rem;
  box-shadow: var(--shadow);
}

.upload-zone {
  border: 2px dashed var(--border);
  border-radius: var(--radius);
  padding: 1.5rem;
  text-align: center;
  color: var(--gray-400);
  cursor: pointer;
  transition: all 0.15s;
}

.upload-zone:hover,
.upload-zone.dragover {
  border-color: var(--teal);
  background: rgba(92,191,179,0.04);
}

.upload-previews {
  display: flex;
  gap: 0.5rem;
  flex-wrap: wrap;
  margin-top: 0.75rem;
}

.upload-thumb {
  width: 64px;
  height: 64px;
  border-radius: var(--radius);
  object-fit: cover;
  border: 1px solid var(--border);
}

.preview-toolbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 1rem;
}

.preview-toolbar h3 {
  font-size: 1.125rem;
  color: var(--navy);
}

.preview-actions {
  display: flex;
  gap: 0.5rem;
}

.preview-content {
  min-height: 300px;
  padding: 1rem;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  font-size: 0.875rem;
  line-height: 1.7;
  overflow-y: auto;
  max-height: 600px;
}

.preview-content[contenteditable="true"] {
  outline: none;
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(92,191,179,0.15);
}

.preview-content h1 {
  font-size: 1.5rem;
  margin-bottom: 0.5rem;
}

.preview-content h2 {
  font-size: 1.25rem;
  margin: 1.25rem 0 0.5rem;
}

.preview-content p {
  margin-bottom: 0.75rem;
}

.generating {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem;
  color: var(--gray-500);
  font-size: 0.875rem;
}

.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--border);
  border-top-color: var(--teal);
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

.success-msg {
  padding: 1rem;
  color: var(--success);
  font-weight: 500;
  font-size: 0.875rem;
}

/* --- Responsive --- */

@media (max-width: 768px) {
  .top-nav {
    flex-wrap: wrap;
  }

  .nav-links {
    order: 3;
    width: 100%;
    justify-content: center;
  }

  .stats-row {
    flex-wrap: wrap;
  }

  .compose-layout {
    grid-template-columns: 1fr;
  }
}