/* --- Complete Updated CSS --- */

:root {
  /* Humbot-style dark theme: near-black chrome, mint-teal as the dominant
     accent for text/emphasis (not just buttons), blue reserved as a subtle
     secondary note at the gradient's edge. */
  --paper: #0a0c12;
  --paper-raised: #141922;
  --paper-raised-2: #1b212d;
  --ink: #f2f5f9;
  --ink-soft: #9aa4b8;
  --ink-faint: #66708a;
  --verify-green: #34d399;
  --flag-red: #f36a63;
  --amber: #f0b429;
  --rule: #232a38;
  --rule-strong: #333c4e;

  --brand-navy: #08090f;
  --brand-navy-raised: #12151e;
  --brand-blue: #5b8def;
  --brand-teal: #2fe6c4;
  --brand-teal-soft: #7ff2da;
  --brand-violet: #8b7bf0;
  --brand-gradient: linear-gradient(135deg, #7ff2da 0%, #2fe6c4 55%, #24b8e0 100%);

  /* Sidebar specific */
  --sidebar-width: 264px;
  --sidebar-bg: linear-gradient(180deg, #0b0e15 0%, #08090f 100%);
  --sidebar-text: #f2f5f9;
  --sidebar-hover: rgba(47, 230, 196, 0.10);
  --sidebar-active: rgba(47, 230, 196, 0.16);
  --nav-height: 64px;
  --bottom-nav-height: 64px;

  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 16px;
  --shadow-soft: 0 4px 20px rgba(0,0,0,0.25);
  --shadow-raised: 0 12px 32px rgba(0,0,0,0.35);

  --font-display: "Fraunces", Georgia, serif;
  --font-body: "Source Sans 3", system-ui, sans-serif;
  --font-mono: "JetBrains Mono", monospace;
}


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

body {
  background: var(--paper);
  color: var(--ink);
  font-family: var(--font-body);
  -webkit-font-smoothing: antialiased;
  overflow-x: hidden;
}

a {
  color: var(--brand-teal);
}

a:hover {
  color: var(--brand-teal-soft);
}

/* --- App Shell with Sidebar --- */
.app-shell {
  display: flex;
  min-height: 100vh;
  position: relative;
}

/* --- Top Navigation --- */
.top-nav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--nav-height);
  background: rgba(13, 16, 26, 0.72);
  backdrop-filter: blur(14px) saturate(140%);
  -webkit-backdrop-filter: blur(14px) saturate(140%);
  color: var(--ink);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 24px;
  z-index: 1000;
  border-bottom: 1px solid var(--rule);
  overflow: hidden;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.brand-link {
  color: var(--ink);
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 600;
  display: flex;
  align-items: center;
}

.brand-link:hover {
  opacity: 0.85;
}
.site-logo {
  height: clamp(32px, 8vw, 46px);
  max-height: calc(var(--nav-height) - 2px);
  width: auto;
  max-width: 100%;
  flex-shrink: 1;
  min-width: 0;
  object-fit: contain;
}

.nav-brand .tag {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.08em;
  background: rgba(255,255,255,0.1);
  padding: 2px 10px;
  border-radius: 12px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 12px;
}

.nav-toggle {
  background: transparent;
  border: 1px solid var(--rule-strong);
  color: var(--ink);
  padding: 6px 10px;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 18px;
  transition: all 0.2s;
}

.nav-toggle:hover {
  background: var(--paper-raised);
  border-color: var(--brand-teal);
}

/* --- Sidebar --- */
.sidebar {
  position: fixed;
  top: 0;
  left: 0;
  height: 100vh;
  width: var(--sidebar-width);
  background: var(--sidebar-bg);
  color: var(--sidebar-text);
  transform: translateX(-100%);
  transition: transform 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1001;
  display: flex;
  flex-direction: column;
  border-right: 1px solid var(--rule);
  box-shadow: var(--shadow-raised);
}

.sidebar.open {
  transform: translateX(0);
}

.sidebar-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  border-bottom: 1px solid rgba(255,255,255,0.08);
  min-height: var(--nav-height);
}

.sidebar-brand {
  font-family: var(--font-display);
  font-size: 18px;
  font-weight: 600;
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--ink);
}

.sidebar-brand i {
  font-size: 20px;
}

.sidebar-close {
  background: transparent;
  border: none;
  color: var(--sidebar-text);
  font-size: 20px;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 4px;
  transition: background 0.2s;
}

.sidebar-close:hover {
  background: rgba(255,255,255,0.1);
}

.sidebar-nav {
  flex: 1;
  padding: 16px 12px;
  overflow-y: auto;
}

.nav-section {
  margin-bottom: 24px;
}

.nav-section-title {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: rgba(47, 230, 196, 0.35);
  padding: 0 12px;
  margin-bottom: 8px;
}

.nav-item {
  position: relative;
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 14px;
  color: rgba(127, 242, 218, 0.62);
  text-decoration: none;
  border-radius: var(--radius-sm);
  transition: all 0.2s;
  font-size: 14px;
  margin-bottom: 2px;
}

.nav-item i {
  width: 20px;
  font-size: 16px;
  text-align: center;
}

.nav-item:hover {
  background: var(--sidebar-hover);
  color: var(--brand-teal-soft);
}

.nav-item.active {
  background: var(--sidebar-active);
  color: var(--brand-teal-soft);
  font-weight: 600;
}

.nav-item.active::before {
  content: '';
  position: absolute;
  left: 0;
  top: 6px;
  bottom: 6px;
  width: 3px;
  border-radius: 3px;
  background: var(--brand-gradient);
}

.nav-item.active i {
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.nav-item.logout {
  color: #f87171;
}

.nav-item.logout:hover {
  background: rgba(248, 113, 113, 0.1);
}

.sidebar-footer {
  padding: 16px 20px;
  border-top: 1px solid rgba(255,255,255,0.08);
}

.user-info {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 13px;
  color: rgba(255,255,255,0.7);
}

.user-info i {
  font-size: 18px;
}

.sidebar-version {
  font-family: var(--font-mono);
  font-size: 10px;
  color: rgba(255,255,255,0.2);
  margin-top: 6px;
}

/* --- Sidebar Overlay --- */
.sidebar-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.5);
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
  z-index: 1000;
}

.sidebar-overlay.visible {
  opacity: 1;
  visibility: visible;
}

/* --- Main Content --- */
.main-content {
  flex: 1;
  margin-left: 0;
  padding: calc(var(--nav-height) + 24px) 24px 48px;
  max-width: 100%;
  transition: margin-left 0.3s ease;
}

/* --- Page Header --- */
.page-header {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 28px;
  padding-bottom: 16px;
  border-bottom: 1px solid var(--rule);
}

.page-header-left {
  display: flex;
  align-items: center;
  gap: 12px;
}

.mobile-menu-btn {
  display: none;
  background: transparent;
  border: 1px solid var(--rule-strong);
  color: var(--ink);
  padding: 6px 10px;
  border-radius: 6px;
  cursor: pointer;
  font-size: 18px;
  transition: all 0.2s;
}

.mobile-menu-btn:hover {
  background: var(--paper-raised);
  border-color: var(--ink);
}

.page-title {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 600;
  letter-spacing: -0.01em;
  margin: 0;
  background: var(--brand-gradient);
  -webkit-background-clip: text;
  background-clip: text;
  -webkit-text-fill-color: transparent;
}

.page-header-right {
  display: flex;
  align-items: center;
}

.user-badge {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-soft);
  display: flex;
  align-items: center;
  gap: 6px;
  background: var(--paper-raised);
  padding: 4px 12px;
  border-radius: 20px;
  border: 1px solid var(--rule);
}

/* --- Tabs --- */
.tabs {
  display: flex;
  gap: 4px;
  margin-bottom: 28px;
  background: var(--paper-raised);
  padding: 4px;
  border-radius: var(--radius-md);
  border: 1px solid var(--rule);
}

.tab {
  flex: 1;
  text-align: center;
  padding: 10px 16px;
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  background: transparent;
  border: none;
  border-radius: var(--radius-sm);
  color: var(--ink-soft);
  cursor: pointer;
  transition: all 0.15s ease;
  text-decoration: none;
}

.tab.active {
  background: var(--brand-gradient);
  color: #ffffff;
}

.tab:not(.active):hover {
  color: var(--ink);
  background: var(--paper-raised-2);
}

/* --- Dropzone --- */
.dropzone {
  border: 1.5px dashed var(--rule-strong);
  background: var(--paper-raised);
  border-radius: var(--radius-lg);
  padding: 48px 24px;
  text-align: center;
  cursor: pointer;
  transition: border-color 0.15s ease, background 0.15s ease, transform 0.15s ease;
}

.dropzone:hover {
  border-color: var(--brand-teal);
  transform: translateY(-1px);
}

.dropzone.drag-active {
  border-color: var(--brand-teal);
  background: var(--paper-raised-2);
}

.dropzone p {
  margin: 4px 0;
}

.dropzone .primary {
  font-family: var(--font-display);
  font-size: 18px;
}

.dropzone .secondary {
  font-family: var(--font-mono);
  font-size: 11px;
  color: var(--ink-faint);
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* --- Textarea --- */
textarea.paste-area {
  width: 100%;
  min-height: 220px;
  padding: 18px;
  font-family: var(--font-body);
  font-size: 15px;
  line-height: 1.6;
  background: var(--paper-raised);
  border: 1.5px solid var(--rule-strong);
  border-radius: var(--radius-md);
  color: var(--ink);
  resize: vertical;
}

textarea.paste-area:focus {
  outline: none;
  border-color: var(--brand-teal);
  box-shadow: 0 0 0 3px rgba(47, 230, 196, 0.15);
}

.word-count-hint {
  text-align: right;
  font-size: 12px;
  color: var(--ink-soft);
  margin-top: 6px;
}

/* --- Buttons --- */
.action-row {
  display: flex;
  justify-content: flex-end;
  margin-top: 14px;
  gap: 10px;
}

button.btn,
a.btn {
  font-family: var(--font-mono);
  font-size: 12px;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  padding: 12px 22px;
  border: none;
  border-radius: var(--radius-sm);
  background: var(--brand-gradient);
  color: #ffffff;
  cursor: pointer;
  transition: transform 0.15s ease, box-shadow 0.15s ease, opacity 0.15s ease;
  box-shadow: 0 6px 18px rgba(47, 230, 196, 0.25);
}

button.btn:hover,
a.btn:hover {
  transform: translateY(-1px);
  box-shadow: 0 10px 24px rgba(47, 230, 196, 0.35);
}

button.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none;
  box-shadow: none;
}

button.btn.secondary {
  background: transparent;
  color: var(--ink);
  border: 1.5px solid var(--rule-strong);
  box-shadow: none;
}

/* --- Report Styles --- */
.report {
  margin-top: 40px;
  border-top: 2px solid var(--ink);
  padding-top: 28px;
}

/* --- Bottom Navbar (mobile) --- */
.bottom-navbar {
  display: none;
  position: fixed;
  left: 0;
  right: 0;
  bottom: 0;
  height: var(--bottom-nav-height);
  background: var(--brand-navy);
  box-shadow: 0 -2px 12px rgba(0,0,0,0.18);
  z-index: 999;
  padding-bottom: env(safe-area-inset-bottom);
}

.bottom-navbar-inner {
  display: flex;
  align-items: stretch;
  justify-content: space-around;
  height: var(--bottom-nav-height);
}

.bottom-nav-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 3px;
  flex: 1;
  border: none;
  background: transparent;
  color: rgba(127, 242, 218, 0.6);
  text-decoration: none;
  font-family: var(--font-body);
  font-size: 10.5px;
  letter-spacing: 0.02em;
  cursor: pointer;
  transition: color 0.15s ease;
}

.bottom-nav-item i {
  font-size: 18px;
}

.bottom-nav-item.active {
  color: var(--brand-teal);
}

.bottom-nav-item:hover {
  color: var(--brand-teal-soft);
}

/* --- Responsive --- */
@media (min-width: 1024px) {
  .sidebar {
    transform: translateX(0) !important;
  }

  .main-content {
    margin-left: var(--sidebar-width);
  }

  .nav-toggle,
  .sidebar-close,
  .sidebar-overlay,
  .mobile-menu-btn,
  .bottom-navbar {
    display: none !important;
  }

  .sidebar-overlay {
    display: none !important;
  }
}

@media (max-width: 1023px) {
  .mobile-menu-btn {
    display: block;
  }

  .main-content {
    padding: calc(var(--nav-height) + 16px) 16px calc(var(--bottom-nav-height) + 32px);
  }

  .page-title {
    font-size: 22px;
  }

  .bottom-navbar {
    display: block;
  }
}

@media (max-width: 600px) {
  .nav-brand .tag {
    display: none;
  }
  
  .page-header {
    flex-direction: column;
    align-items: stretch;
    gap: 12px;
  }
  
  .page-header-right {
    justify-content: flex-start;
  }
  
  .report-head {
    flex-direction: column;
    align-items: center;
    text-align: center;
  }
  
  .stamp {
    width: 80px;
    height: 80px;
  }
  
  .stamp .score {
    font-size: 24px;
  }
  
  .signal-row {
    grid-template-columns: 1fr;
    gap: 8px;
  }
  
  .signal-metrics {
    justify-content: flex-start;
    width: 100%;
  }
}

/* --- Keep existing styles below this line --- */

/* ... (rest of your existing styles remain the same) ... */

/* Auth forms, history table, etc. */
.auth-form {
  max-width: 380px;
  margin: 40px auto 0;
}

.auth-form label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  margin-bottom: 6px;
  margin-top: 16px;
}

.auth-form input[type="text"],
.auth-form input[type="email"],
.auth-form input[type="password"] {
  width: 100%;
  padding: 10px 12px;
  font-family: var(--font-body);
  font-size: 15px;
  border: 1.5px solid var(--rule-strong);
  background: var(--paper-raised);
}

.auth-form input:focus {
  outline: 2px solid var(--ink);
  outline-offset: -2px;
}

.auth-form .btn {
  width: 100%;
  margin-top: 20px;
}

.auth-switch {
  text-align: center;
  margin-top: 16px;
  font-size: 13px;
  color: var(--ink-soft);
}

.alert {
  padding: 12px 16px;
  font-size: 13px;
  margin-bottom: 16px;
}

.alert-error {
  background: rgba(226, 104, 95, 0.12);
  border-left: 4px solid var(--flag-red);
  color: var(--flag-red);
}

.alert-success {
  background: rgba(63, 174, 127, 0.12);
  border-left: 4px solid var(--verify-green);
  color: var(--verify-green);
}

table.history-table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 20px;
}

table.history-table th,
table.history-table td {
  text-align: left;
  padding: 10px 8px;
  border-bottom: 1px solid var(--rule);
  font-size: 13px;
}

table.history-table th {
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--ink-soft);
}

.error-box {
  background: rgba(243, 106, 99, 0.12);
  border-left: 4px solid var(--flag-red);
  border-radius: var(--radius-sm);
  padding: 14px 18px;
  font-size: 13px;
  color: var(--flag-red);
  margin-top: 16px;
}

.humanize-panel {
  margin-top: 40px;
  border-top: 2px solid var(--ink);
  padding-top: 28px;
}

.humanize-panel h2 {
  font-family: var(--font-display);
  font-size: 22px;
  margin: 0 0 16px;
}

.tone-select,
.intensity-select {
  font-family: var(--font-mono);
  font-size: 12px;
  padding: 8px 10px;
  border: 1.5px solid var(--rule-strong);
  background: var(--paper-raised);
  color: #ffffff;
  border-radius: 6px;
  margin-bottom: 12px;
  max-width: 100%;
}

.rewritten-box {
  background: var(--paper-raised);
  border: 1.5px solid var(--rule-strong);
  border-left: 4px solid var(--verify-green);
  border-radius: var(--radius-md);
  padding: 18px;
  font-size: 15px;
  line-height: 1.65;
  white-space: pre-wrap;
}

.spinner-text {
  font-family: var(--font-mono);
  font-size: 12px;
  color: var(--ink-soft);
  letter-spacing: 0.05em;
}

.disclaimer {
  margin-top: 24px;
  font-size: 12px;
  color: var(--ink-faint);
  font-style: italic;
  border-left: 2px solid var(--rule-strong);
  padding-left: 12px;
}

/* ==========================================================================
   Progress loader — shown over long-running form submits (analyze/humanize)
   ========================================================================== */
.progress-overlay {
  position: fixed;
  inset: 0;
  background: rgba(27, 36, 48, 0.72);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 5000;
  opacity: 0;
  visibility: hidden;
  transition: opacity 0.2s ease, visibility 0.2s ease;
  padding: 20px;
}

.progress-overlay.visible {
  opacity: 1;
  visibility: visible;
}

.progress-overlay-card {
  background: var(--paper-raised);
  border-radius: 14px;
  padding: 32px 36px;
  width: 100%;
  max-width: 360px;
  text-align: center;
  box-shadow: 0 24px 60px rgba(0, 0, 0, 0.35);
}

.progress-spinner {
  font-size: 28px;
  color: var(--verify-green);
  margin-bottom: 12px;
}

.progress-title {
  font-family: var(--font-display, serif);
  font-size: 18px;
  margin: 0 0 16px;
  color: var(--ink);
}

.progress-bar-track {
  height: 8px;
  background: var(--rule);
  border-radius: 4px;
  overflow: hidden;
}

.progress-bar-fill {
  height: 100%;
  width: 0%;
  border-radius: 4px;
  background: linear-gradient(90deg, var(--verify-green, #2f6f4e), #4a9d76);
  transition: width 0.25s ease;
}

.progress-status {
  margin: 14px 0 0;
  font-size: 13px;
  color: var(--ink-soft, #5b6472);
  min-height: 18px;
}

@media (prefers-reduced-motion: reduce) {
  .progress-spinner i { animation: none !important; }
}

/* ==========================================================================
   Auth pages (login.php / register.php) — sidebar-free shell
   Used with includes/layout_auth_header.php + layout_auth_footer.php
   ========================================================================== */
.auth-body { background: var(--paper); }

.auth-topbar {
  padding: 22px 24px;
  width: 100%;
  margin: 0 auto;
}
.auth-topbar .brand-link {
  color: var(--ink);
  text-decoration: none;
  font-family: var(--font-display);
  font-size: 20px;
  font-weight: 700;
  display: flex;
  align-items: center;
  gap: 10px;
}
.auth-topbar .brand-link i { color: var(--brand-teal); }
.auth-topbar .brand-link:hover { opacity: 0.85; }

.auth-page-shell {
  padding: 24px 24px 64px;
  width: 100%;
  margin: 0 auto;
}

.auth-container {
  max-width: 480px;
  margin: 0 auto;
  padding: 20px 0;
}

.auth-card {
  background: var(--paper-raised);
  border-radius: 16px;
  padding: 40px 32px;
  border: 1px solid var(--rule);
  box-shadow: 0 4px 24px rgba(0, 0, 0, 0.06);
}

.auth-card-header {
  text-align: center;
  margin-bottom: 32px;
}

.auth-icon {
  width: 56px;
  height: 56px;
  background: var(--ink);
  color: var(--paper);
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 24px;
  margin: 0 auto 16px;
}

.auth-title {
  font-family: var(--font-display);
  font-size: 28px;
  font-weight: 600;
  margin: 0 0 4px 0;
  color: var(--ink);
}

.auth-subtitle {
  color: var(--ink-soft);
  font-size: 14px;
  margin: 0;
}

/* Form Styles */
.form-group {
  margin-bottom: 20px;
}

.form-group label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--ink-soft);
  margin-bottom: 6px;
}

.form-group label i {
  font-size: 13px;
  color: var(--ink-faint);
}

.form-input {
  width: 100%;
  padding: 12px 14px;
  font-family: var(--font-body);
  font-size: 15px;
  border: 1.5px solid var(--rule-strong);
  background: var(--paper);
  border-radius: 8px;
  transition: all 0.2s;
  color: var(--ink);
}

.form-input:focus {
  outline: none;
  border-color: var(--brand-teal);
  box-shadow: 0 0 0 3px rgba(47, 230, 196, 0.15);
  background: var(--paper-raised);
}

.form-input::placeholder {
  color: var(--ink-faint);
}

.password-wrapper {
  position: relative;
}

.password-toggle {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  background: none;
  border: none;
  color: var(--ink-faint);
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 4px;
  transition: all 0.2s;
}

.password-toggle:hover {
  color: var(--ink);
  background: var(--paper-raised);
}

/* Form Options */
.form-options {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 24px;
}

.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--ink-soft);
  cursor: pointer;
  position: relative;
}

.checkbox-label input[type="checkbox"] {
  display: none;
}

.checkmark {
  width: 18px;
  height: 18px;
  border: 2px solid var(--rule-strong);
  border-radius: 4px;
  display: inline-block;
  position: relative;
  transition: all 0.2s;
  flex-shrink: 0;
}

.checkbox-label input:checked + .checkmark {
  background: var(--ink);
  border-color: var(--ink);
}

.checkbox-label input:checked + .checkmark::after {
  content: '✓';
  position: absolute;
  top: 50%;
  left: 50%;
  transform: translate(-50%, -50%);
  color: var(--paper);
  font-size: 12px;
  font-weight: 600;
}

.forgot-link {
  font-size: 13px;
  color: var(--ink-soft);
  text-decoration: none;
  transition: color 0.2s;
}

.forgot-link:hover {
  color: var(--ink);
  text-decoration: underline;
}

/* Buttons */
.btn-block {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 14px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
}

.btn-primary {
  background: var(--ink);
  color: var(--paper);
  border: none;
  transition: all 0.2s;
  cursor: pointer;
}

.btn-primary:hover {
  background: var(--brand-navy-raised);
  transform: translateY(-1px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-primary:active {
  transform: translateY(0);
}

.btn-secondary {
  background: transparent;
  color: var(--ink);
  border: 1.5px solid var(--rule-strong);
  transition: all 0.2s;
  text-decoration: none;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 14px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
}

.btn-secondary:hover {
  border-color: var(--ink);
  background: var(--paper);
  text-decoration: none;
  color: var(--ink);
}

/* Auth Divider */
.auth-divider {
  text-align: center;
  margin: 24px 0;
  position: relative;
}

.auth-divider::before {
  content: '';
  position: absolute;
  top: 50%;
  left: 0;
  right: 0;
  height: 1px;
  background: var(--rule);
}

.auth-divider span {
  background: var(--paper-raised);
  padding: 0 16px;
  position: relative;
  color: var(--ink-faint);
  font-size: 13px;
}

/* Google sign-in button */
.btn-google {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 13px;
  border-radius: 8px;
  font-size: 14px;
  font-weight: 600;
  background: var(--paper);
  color: var(--ink);
  border: 1.5px solid var(--rule-strong);
  cursor: pointer;
  transition: all 0.2s;
}

.btn-google:hover:not(:disabled) {
  border-color: var(--ink);
  background: var(--paper-raised);
}

.btn-google:disabled {
  opacity: 0.6;
  cursor: not-allowed;
}

.btn-google i { color: #ea4335; font-size: 16px; }

/* Auth Footer */
.auth-footer {
  margin-top: 8px;
}

/* Alert Styles */
.alert {
  padding: 14px 16px;
  border-radius: 8px;
  font-size: 13px;
  margin-bottom: 20px;
  display: flex;
  align-items: center;
}

.alert-success {
  background: rgba(63, 174, 127, 0.12);
  border: 1px solid rgba(63, 174, 127, 0.3);
  color: var(--verify-green);
}

.alert-error {
  background: rgba(226, 104, 95, 0.12);
  border: 1px solid rgba(226, 104, 95, 0.3);
  color: var(--flag-red);
}

/* Features Section */
.auth-features {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 16px;
  margin-top: 32px;
  padding: 0 8px;
}

.feature-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 16px;
  background: var(--paper-raised);
  border-radius: 12px;
  border: 1px solid var(--rule);
  transition: all 0.2s;
}

.feature-item:hover {
  border-color: var(--ink);
  transform: translateY(-2px);
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.05);
}

.feature-item i {
  font-size: 24px;
  color: var(--ink-soft);
  flex-shrink: 0;
}

.feature-item h4 {
  font-size: 13px;
  font-weight: 600;
  margin: 0 0 2px 0;
  color: var(--ink);
}

.feature-item p {
  font-size: 11px;
  color: var(--ink-faint);
  margin: 0;
}

@media (max-width: 600px) {
  .auth-container {
    padding: 10px 0;
  }

  .auth-card {
    padding: 28px 20px;
  }

  .auth-title {
    font-size: 24px;
  }

  .form-options {
    flex-direction: column;
    gap: 12px;
    align-items: flex-start;
  }

  .auth-features {
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .feature-item {
    padding: 12px;
  }
}

/* --- Credit balance banner (analyze.php / humanize.php / plagiarism.php) --- */
.usage-banner {
    background: var(--paper-raised);
    border: 1px solid var(--rule);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-soft);
    padding: 16px 20px;
    margin-bottom: 24px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 12px;
}

.usage-banner .usage-info {
    display: flex;
    align-items: center;
    gap: 16px;
    flex-wrap: wrap;
}

.usage-banner .usage-label {
    font-size: 13px;
    color: var(--ink-soft);
}

.usage-banner .usage-count {
    font-weight: 600;
    color: var(--ink);
}

.usage-banner .plan-badge {
    font-size: 12px;
    font-weight: 600;
    padding: 2px 12px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.usage-banner .plan-badge.free {
    background: var(--rule);
    color: var(--ink-soft);
}

.usage-banner .plan-badge.premium {
    background: #fef3c7;
    color: #92400e;
}

.usage-banner .plan-badge.enterprise {
    background: #dbeafe;
    color: #1e40af;
}

.usage-banner .usage-bar {
    flex: 1;
    min-width: 150px;
    max-width: 300px;
}

.usage-banner .usage-bar-track {
    height: 6px;
    background: var(--rule);
    border-radius: 3px;
    overflow: hidden;
}

.usage-banner .usage-bar-fill {
    height: 100%;
    border-radius: 3px;
    transition: width 0.6s ease;
}

.usage-banner .usage-bar-fill.low { background: #34d399; }
.usage-banner .usage-bar-fill.medium { background: #fbbf24; }
.usage-banner .usage-bar-fill.high { background: #f87171; }

.usage-banner .usage-upgrade { flex-shrink: 0; }
.usage-banner .usage-upgrade .btn-sm { padding: 4px 16px; font-size: 12px; }

@media (max-width: 600px) {
    .usage-banner {
        flex-direction: column;
        align-items: stretch;
        text-align: center;
    }
    .usage-banner .usage-info { justify-content: center; }
    .usage-banner .usage-bar { max-width: 100%; }
}