/* =============================================================
   ENTERPRISE OJS SYSTEM — UI/UX DESIGN SYSTEM
   Fonts: Plus Jakarta Sans (UI), Merriweather (Article Reading)
   Aesthetic: Academic, Scientific, Minimalist, Enterprise
   ============================================================= */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&family=Merriweather:ital,wght@0,300;0,400;0,700;1,400&display=swap');

/* ── DESIGN TOKENS (LIGHT MODE DEFAULT) ─────────────────────── */
:root {
  /* Colors - Primary (Academic Blue) & Secondary */
  --primary: #0F4C81;
  --primary-hover: #0C3D66;
  --primary-light: #E6F0F9;
  --secondary: #4A5568;
  --secondary-hover: #2D3748;

  /* Surface & Background */
  --bg-app: #F7FAFC;
  /* Cool Gray background */
  --bg-surface: #FFFFFF;
  /* Pure white for cards */
  --border: #E2E8F0;
  --border-focus: #CBD5E1;

  /* Typography Colors */
  --text-main: #1A202C;
  /* High readability */
  --text-muted: #718096;
  /* Citations, dates */
  --text-inverse: #FFFFFF;

  /* Semantic Colors */
  --success: #2F855A;
  --success-bg: #F0FDF4;
  --warning: #C05621;
  --warning-bg: #FFF7ED;
  --danger: #C53030;
  --danger-bg: #FEF2F2;
  --info: #2B6CB0;
  --info-bg: #EBF8FF;

  /* Layout / Dimensions */
  --sidebar-w: 260px;
  --topbar-h: 64px;

  /* Border Radius */
  --radius-sm: 8px;
  --radius-md: 12px;
  --radius-lg: 20px;

  /* Shadows - Premium Diffuse Shadows */
  --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.02), 0 1px 2px rgba(0, 0, 0, 0.01);
  --shadow-md: 0 10px 15px -3px rgba(0, 0, 0, 0.04), 0 4px 6px -4px rgba(0, 0, 0, 0.02);
  --shadow-lg: 0 20px 25px -5px rgba(0, 0, 0, 0.08), 0 8px 10px -6px rgba(0, 0, 0, 0.04);
  --shadow-float: 0 15px 35px -5px rgba(0, 0, 0, 0.08), 0 0 0 1px rgba(0, 0, 0, 0.02);
}

/* ── DARK MODE (Optional Toggle / OS Preference) ────────────── */
@media (prefers-color-scheme: dark) {
  /* Commented out for now, to focus on primary light mode as per standard journal apps.
     Uncomment or scope to [data-theme="dark"] later if full dark mode is implemented. */
}

/* ── RESET / BASE ───────────────────────────────────────────── */
*,
*::before,
*::after {
  box-sizing: border-box;
}

body {
  font-family: 'Plus Jakarta Sans', system-ui, sans-serif;
  background: var(--bg-app);
  color: var(--text-main);
  font-size: 15px;
  /* Slightly refined base size */
  line-height: 1.6;
  margin: 0;
  -webkit-font-smoothing: antialiased;
  letter-spacing: -0.01em;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  margin-top: 0;
  font-weight: 600;
  color: var(--text-main);
  line-height: 1.2;
}

a {
  color: var(--primary);
  text-decoration: none;
  transition: color 0.15s;
}

a:hover {
  color: var(--primary-hover);
}

img {
  max-width: 100%;
  height: auto;
}

/* ── TYPOGRAPHY ─────────────────────────────────────────────── */
.h1 {
  font-size: 32px;
  font-weight: 600;
  letter-spacing: -0.02em;
}

.h2 {
  font-size: 24px;
  font-weight: 600;
  letter-spacing: -0.01em;
}

.h3 {
  font-size: 20px;
  font-weight: 500;
}

.text-body-ui {
  font-size: 16px;
}

.text-body-reading {
  font-family: 'Merriweather', serif;
  font-size: 18px;
  line-height: 1.7;
}

.text-caption {
  font-size: 13px;
  color: var(--text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* ── LAYOUT (ADMIN/DASHBOARD) ───────────────────────────────── */
.wrapper {
  display: flex;
  min-height: 100vh;
}

.sidebar {
  width: var(--sidebar-w);
  background: #0f172a;
  /* Dark elegant sidebar */
  color: #F3F4F6;
  position: fixed;
  top: 0;
  bottom: 0;
  left: 0;
  z-index: 100;
  overflow-y: auto;
  border-right: none;
  box-shadow: 2px 0 20px rgba(0, 0, 0, 0.05);
}

.sidebar-header {
  padding: 20px 24px;
  font-size: 18px;
  font-weight: 700;
  letter-spacing: -0.02em;
  border-bottom: 1px solid #1F2937;
  display: flex;
  align-items: center;
  gap: 12px;
}

.sidebar-menu {
  list-style: none;
  padding: 16px 0;
  margin: 0;
}

.sidebar-menu li {
  padding: 4px 16px;
}

.sidebar-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 16px;
  color: #9CA3AF;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
}

.sidebar-link:hover {
  background: #1F2937;
  color: #FFFFFF;
}

.sidebar-link.active {
  background: var(--primary);
  color: #FFFFFF;
}

.sidebar-link i {
  font-size: 18px;
  width: 24px;
  text-align: center;
}

.main-content {
  flex: 1;
  margin-left: var(--sidebar-w);
  display: flex;
  flex-direction: column;
}

.topbar {
  height: var(--topbar-h);
  background: rgba(255, 255, 255, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 32px;
  position: sticky;
  top: 0;
  z-index: 90;
}

.page-content {
  padding: 32px;
  flex: 1;
  max-width: 1400px;
  margin: 0 auto;
  width: 100%;
}

/* ── PAGE HEADERS ───────────────────────────────────────────── */
.page-header {
  margin-bottom: 24px;
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
}

.page-title {
  margin: 0;
  font-size: 24px;
  font-weight: 700;
  color: var(--text-main);
}

.page-subtitle {
  margin: 4px 0 0 0;
  font-size: 14px;
  color: var(--text-muted);
}

.breadcrumb {
  display: flex;
  gap: 8px;
  font-size: 13px;
  margin-bottom: 8px;
  color: var(--text-muted);
}

.breadcrumb a {
  color: var(--primary);
}

/* ── CARDS (ENTERPRISE BI STYLE) ── */
.card {
  background: var(--bg-surface);
  border: 1px solid rgba(226, 232, 240, 0.8);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.02), 0 2px 4px -1px rgba(0, 0, 0, 0.02);
  margin-bottom: 24px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 25px -5px rgba(0, 0, 0, 0.05), 0 10px 10px -5px rgba(0, 0, 0, 0.02);
  border-color: rgba(203, 213, 225, 0.8);
}

.card-header {
  padding: 20px 24px;
  border-bottom: 1px solid rgba(226, 232, 240, 0.6);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: transparent;
}

.card-title {
  margin: 0;
  font-size: 16px;
  font-weight: 600;
}

.card-body {
  padding: 24px;
}

/* KPI Cards */
.kpi-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
  gap: 24px;
  margin-bottom: 24px;
}

.kpi-card {
  padding: 24px;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.kpi-title {
  font-size: 13px;
  color: var(--text-muted);
  text-transform: uppercase;
  font-weight: 600;
  letter-spacing: 0.05em;
}

.kpi-value {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1;
}

/* ── BUTTONS ────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  height: 40px;
  padding: 0 16px;
  font-family: inherit;
  font-size: 14px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: all 0.15s;
  border: 1px solid transparent;
}

.btn-primary {
  background: var(--primary);
  color: var(--text-inverse);
  border-color: var(--primary);
}

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

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

.btn-secondary:hover {
  background: var(--bg-app);
  border-color: var(--border-focus);
}

.btn-danger {
  background: var(--danger);
  color: var(--text-inverse);
}

.btn-danger:hover {
  background: #9B2C2C;
}

/* ── FORMS & INPUTS ─────────────────────────────────────────── */
.form-group {
  margin-bottom: 20px;
}

.form-label {
  display: block;
  font-size: 14px;
  font-weight: 500;
  color: var(--text-main);
  margin-bottom: 8px;
}

.form-control {
  width: 100%;
  height: 44px;
  padding: 0 16px;
  font-family: inherit;
  font-size: 14px;
  background: var(--bg-surface);
  color: var(--text-main);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  transition: all 0.2s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 1px 2px rgba(0, 0, 0, 0.05);
}

.form-control:hover {
  border-color: #cbd5e1;
}

.form-control:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 4px rgba(15, 76, 129, 0.15), 0 1px 2px rgba(0, 0, 0, 0.05);
}

textarea.form-control {
  height: auto;
  padding: 12px;
  min-height: 100px;
  resize: vertical;
}

/* ── TABLES ─────────────────────────────────────────────────── */
.table-responsive {
  overflow-x: auto;
}

.table {
  width: 100%;
  border-collapse: collapse;
  text-align: left;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

.table th {
  padding: 14px 20px;
  background: var(--bg-app);
  color: var(--text-muted);
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  border-bottom: 2px solid rgba(226, 232, 240, 0.8);
}

.table td {
  padding: 16px 20px;
  border-bottom: 1px solid rgba(226, 232, 240, 0.5);
  color: var(--text-main);
  vertical-align: middle;
  transition: background-color 0.15s ease;
}

.table tbody tr:hover td {
  background: #f1f5f9;
}

/* ── BADGES ─────────────────────────────────────────────────── */
.badge {
  display: inline-flex;
  align-items: center;
  padding: 4px 10px;
  border-radius: 20px;
  font-size: 12px;
  font-weight: 500;
}

.badge-success {
  background: var(--success-bg);
  color: var(--success);
}

.badge-warning {
  background: var(--warning-bg);
  color: var(--warning);
}

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

.badge-info {
  background: var(--info-bg);
  color: var(--info);
}

.badge-neutral {
  background: var(--bg-app);
  color: var(--text-muted);
  border: 1px solid var(--border);
}

/* ── UTILITIES ──────────────────────────────────────────────── */
.flex {
  display: flex;
}

.items-center {
  align-items: center;
}

.justify-between {
  justify-content: space-between;
}

.gap-2 {
  gap: 8px;
}

.gap-3 {
  gap: 12px;
}

.gap-4 {
  gap: 16px;
}

.mt-4 {
  margin-top: 16px;
}

.mb-4 {
  margin-bottom: 16px;
}

/* ── RESPONSIVE ─────────────────────────────────────────────── */
@media (max-width: 768px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s;
  }

  .sidebar.open {
    transform: translateX(0);
    box-shadow: var(--shadow-lg);
  }

  .main-content {
    margin-left: 0;
  }
}

/* ── AUTH & GUEST ─────────────────────────────────────────────── */
.auth-bg {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 40px 16px;
  background: var(--bg-app);
}

.auth-container {
  width: 100%;
  max-width: 440px;
}

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

.auth-logo-icon {
  width: 48px;
  height: 48px;
  background: var(--primary);
  border-radius: var(--radius-md);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 24px;
  margin-bottom: 16px;
  box-shadow: 0 0 0 8px var(--primary-light);
}

.auth-logo-title {
  display: block;
  font-size: 18px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.auth-logo-sub {
  display: block;
  font-size: 13px;
  color: var(--text-muted);
  margin-top: 2px;
}

.auth-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}

.auth-card-header {
  padding: 32px 32px 0;
}

.auth-card-body {
  padding: 24px 32px 32px;
}

.auth-title {
  font-size: 20px;
  font-weight: 700;
  color: var(--text-main);
  margin: 0 0 4px 0;
  letter-spacing: -0.02em;
}

.auth-sub {
  font-size: 14px;
  color: var(--text-muted);
  margin: 0;
}

.auth-footer {
  text-align: center;
  padding: 24px;
  font-size: 13px;
  color: var(--text-muted);
}

.auth-footer a {
  color: var(--text-muted);
  font-weight: 500;
}

.auth-footer a:hover {
  color: var(--primary);
}

.demo-box {
  background: var(--bg-app);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 12px 16px;
  margin-top: 24px;
}

.demo-title {
  font-size: 11px;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.demo-row {
  display: flex;
  justify-content: space-between;
  font-size: 12px;
  color: var(--text-muted);
  padding: 2px 0;
}

.demo-row span {
  font-weight: 500;
  color: var(--text-main);
}

.btn-auth {
  width: 100%;
  padding: 10px 16px;
  border-radius: var(--radius-md);
  background: var(--primary);
  color: white;
  border: none;
  font-size: 14px;
  font-weight: 600;
  cursor: pointer;
  font-family: inherit;
  transition: all 0.15s;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  margin-top: 8px;
}


/* ── PUBLIC WEBSITE LAYOUT ───────────────────────────────────── */
.pub-nav {
  background: var(--bg-surface);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}

.pub-nav-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
  height: 64px;
  display: flex;
  align-items: center;
  gap: 24px;
}

.nav-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  flex-shrink: 0;
}

.nav-brand-icon {
  width: 32px;
  height: 32px;
  background: var(--primary);
  border-radius: var(--radius-sm);
  display: flex;
  align-items: center;
  justify-content: center;
  color: white;
  font-size: 16px;
}

.nav-brand-name {
  font-size: 16px;
  font-weight: 700;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.nav-links {
  display: flex;
  gap: 8px;
  flex: 1;
}

.nav-link-item {
  padding: 6px 12px;
  border-radius: var(--radius-sm);
  font-size: 14px;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  transition: all 0.15s;
}

.nav-link-item:hover {
  background: var(--bg-app);
  color: var(--text-main);
}

.nav-link-item.active {
  background: var(--primary-light);
  color: var(--primary);
  font-weight: 600;
}

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

.pub-footer {
  background: #0a3161;
  color: #9CA3AF;
  margin-top: 80px;
}

.pub-footer-inner {
  max-width: 1200px;
  margin: 0 auto;
  padding: 64px 24px 32px;
}

.footer-brand-name {
  font-size: 16px;
  font-weight: 700;
  color: #F3F4F6;
  letter-spacing: -0.01em;
  margin-bottom: 8px;
}

.footer-desc {
  font-size: 14px;
  color: #9CA3AF;
  line-height: 1.6;
  max-width: 300px;
}

.footer-hdr {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  color: #F3F4F6;
  margin-bottom: 16px;
}

.footer-link {
  display: block;
  font-size: 14px;
  color: #9CA3AF;
  text-decoration: none;
  padding: 4px 0;
  transition: color 0.15s;
}

.footer-link:hover {
  color: #FFFFFF;
}

.footer-divider {
  border-color: #374151;
  margin: 48px 0 24px;
}

.footer-copy {
  font-size: 13px;
  color: #6B7280;
}

.flash-banner {
  padding: 12px 16px;
  font-size: 14px;
  font-weight: 500;
  display: flex;
  align-items: center;
  gap: 12px;
  border-radius: var(--radius-md);
  margin: 24px auto;
  max-width: 1200px;
}

.flash-suc {
  background: var(--success-bg);
  color: var(--success);
  border-left: 4px solid var(--success);
}

.flash-err {
  background: var(--danger-bg);
  color: var(--danger);
  border-left: 4px solid var(--danger);
}

@media(max-width:768px) {
  .nav-links {
    display: none;
  }

  .pub-nav-inner {
    padding: 0 16px;
  }
}

/* pub-flash: Used in app.blade.php (alias of flash-banner) */
.pub-flash {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  font-size: 14px;
  font-weight: 500;
}

.pub-flash-suc {
  background: var(--success-bg);
  color: var(--success);
  border-left: 4px solid var(--success);
}

.pub-flash-err {
  background: var(--danger-bg);
  color: var(--danger);
  border-left: 4px solid var(--danger);
}

/* ── DS-* DESIGN SYSTEM UTILITIES (Enterprise Layer) ────────── */

/* --- ds-btn: Primary Action Buttons --- */
.ds-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  height: 38px;
  padding: 0 16px;
  font-family: inherit;
  font-size: 13px;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  transition: all 0.15s;
  border: 1px solid transparent;
  text-decoration: none;
  white-space: nowrap;
}

.ds-btn:hover {
  text-decoration: none;
}

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

.ds-btn-pri:hover {
  background: var(--primary-hover);
  color: #fff;
  border-color: var(--primary-hover);
}

.ds-btn-out {
  background: var(--bg-surface);
  color: var(--text-main);
  border-color: var(--border);
}

.ds-btn-out:hover {
  background: var(--bg-app);
  color: var(--text-main);
  border-color: var(--border-focus);
}

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

.ds-btn-ghost:hover {
  background: var(--primary-light);
  border-color: transparent;
}

.ds-btn-suc {
  background: var(--success);
  color: #fff;
  border-color: var(--success);
}

.ds-btn-suc:hover {
  background: #276749;
  color: #fff;
}

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

.ds-btn-danger:hover {
  background: #9B2C2C;
  color: #fff;
}

.ds-btn-sm {
  height: 32px;
  padding: 0 12px;
  font-size: 12px;
}

.ds-btn-xs {
  height: 28px;
  padding: 0 10px;
  font-size: 11px;
  border-radius: 5px;
}

/* --- ds-badge: Status Chips --- */
.ds-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 9px;
  border-radius: 20px;
  font-size: 11px;
  font-weight: 700;
  white-space: nowrap;
}

.ds-badge-success {
  background: var(--success-bg);
  color: var(--success);
}

.ds-badge-danger {
  background: var(--danger-bg);
  color: var(--danger);
}

.ds-badge-warning {
  background: var(--warning-bg);
  color: var(--warning);
}

.ds-badge-info {
  background: var(--info-bg);
  color: var(--info);
}

.ds-badge-neutral {
  background: var(--bg-app);
  color: var(--text-muted);
  border: 1px solid var(--border);
}

/* --- ds-alert: Contextual Banners --- */
.ds-alert {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 14px 18px;
  border-radius: 8px;
  font-size: 13px;
  font-weight: 500;
  line-height: 1.5;
}

.ds-alert i {
  font-size: 16px;
  flex-shrink: 0;
  margin-top: 1px;
}

.ds-alert-success {
  background: var(--success-bg);
  color: var(--success);
  border: 1px solid #C6F6D5;
}

.ds-alert-info {
  background: var(--info-bg);
  color: var(--info);
  border: 1px solid #BEE3F8;
}

.ds-alert-warn {
  background: var(--warning-bg);
  color: var(--warning);
  border: 1px solid #FEEBC8;
}

.ds-alert-danger {
  background: var(--danger-bg);
  color: var(--danger);
  border: 1px solid #FED7D7;
}

.ds-alert-close {
  margin-left: auto;
  background: none;
  border: none;
  cursor: pointer;
  opacity: 0.6;
  font-size: 14px;
  padding: 0 4px;
}

.ds-alert-close:hover {
  opacity: 1;
}

/* --- ds-page-hdr: Page Header Bar --- */
.ds-page-hdr {
  display: flex;
  justify-content: space-between;
  align-items: flex-start;
  margin-bottom: 24px;
  flex-wrap: wrap;
  gap: 16px;
}

.ds-page-title {
  margin: 0;
  font-size: 24px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1.2;
}

.ds-page-subtitle {
  margin: 4px 0 0;
  font-size: 14px;
  color: var(--text-muted);
}

/* --- ds-card: Main Content Card --- */
.ds-card {
  background: var(--bg-surface);
  border: 1px solid rgba(226, 232, 240, 0.6);
  border-radius: var(--radius-lg);
  box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.02), 0 2px 4px -1px rgba(0, 0, 0, 0.02);
  overflow: hidden;
  transition: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

.ds-card:hover {
  transform: translateY(-4px);
  box-shadow: 0 20px 40px -10px rgba(0, 0, 0, 0.08);
  border-color: rgba(203, 213, 225, 0.8);
}

.ds-card-hdr {
  padding: 16px 24px;
  border-bottom: 1px solid rgba(226, 232, 240, 0.6);
  display: flex;
  justify-content: space-between;
  align-items: center;
  background: transparent;
}

.ds-card-title {
  font-size: 14px;
  font-weight: 700;
  color: var(--text-main);
}

/* --- ds-section: Form Section Groups --- */
.ds-section {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  margin-bottom: 20px;
  overflow: hidden;
}

.ds-section-hdr {
  padding: 14px 20px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-app);
}

.ds-section-title {
  margin: 0;
  font-size: 14px;
  font-weight: 700;
  color: var(--text-main);
}

.ds-section-body {
  padding: 20px;
}

/* --- ds-table: Enterprise Data Table --- */
.table-responsive {
  overflow-x: auto;
}

.ds-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 14px;
  font-variant-numeric: tabular-nums;
}

.ds-table thead th {
  padding: 14px 20px;
  font-size: 12px;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--text-muted);
  background: #f8fafc;
  border-bottom: 2px solid rgba(226, 232, 240, 0.8);
  white-space: nowrap;
}

.ds-table tbody td {
  padding: 16px 20px;
  border-bottom: 1px solid rgba(226, 232, 240, 0.5);
  vertical-align: middle;
  color: var(--text-main);
  transition: background-color 0.15s ease;
}

.ds-table tbody tr:last-child td {
  border-bottom: none;
}

.ds-table tbody tr:hover td {
  background: #f1f5f9;
  cursor: default;
}

/* --- ds-ftabs: Filter Tab Navigation --- */
.ds-ftabs {
  display: flex;
  gap: 4px;
  border-bottom: 2px solid var(--border);
  padding-bottom: 0;
  overflow-x: auto;
}

.ds-ftab {
  padding: 9px 16px;
  font-size: 13px;
  font-weight: 500;
  color: var(--text-muted);
  text-decoration: none;
  border-radius: 6px 6px 0 0;
  white-space: nowrap;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  transition: all 0.15s;
}

.ds-ftab:hover {
  color: var(--text-main);
  background: var(--bg-app);
}

.ds-ftab.active {
  color: var(--primary);
  font-weight: 700;
  border-bottom-color: var(--primary);
}

/* --- w-100 utility --- */
.w-100 {
  width: 100%;
}

.justify-content-center {
  justify-content: center;
}

/* --- Responsive Sidebar Collapse --- */
@media(max-width:1023px) {
  .sidebar {
    transform: translateX(-100%);
    transition: transform 0.3s;
  }

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

  .main-content {
    margin-left: 0;
  }

  .page-content {
    padding: 20px 16px;
  }
}


/* --- ds-stat: Statistic Cards --- */
.ds-stat {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: 10px;
  padding: 24px;
  transition: box-shadow 0.2s, transform 0.2s;
}

.ds-stat:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-2px);
}

.ds-stat-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  margin-bottom: 16px;
}

.ds-stat-val {
  font-size: 32px;
  font-weight: 700;
  color: var(--text-main);
  line-height: 1;
  margin-bottom: 4px;
  font-variant-numeric: tabular-nums;
}

.ds-stat-lbl {
  font-size: 13px;
  color: var(--text-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* -- Animations ------------------------------------- */
@keyframes fadeUp {
  from {
    opacity: 0;
    transform: translateY(10px);
  }

  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.fu {
  animation: fadeUp 0.3s ease both;
}

.fd1 {
  animation-delay: 0.04s;
}

.fd2 {
  animation-delay: 0.08s;
}

.fd3 {
  animation-delay: 0.12s;
}

.fd4 {
  animation-delay: 0.16s;
}

.fd6 {
  animation-delay: 0.24s;
}

/* ── DARK MODE OVERRIDES (Removed per user request) ── */

/* Enterprise Landing Styles */
.hero {
  background:
    radial-gradient(ellipse 70% 60% at 50% -10%, rgba(37, 99, 235, 0.08) 0%, transparent 70%),
    radial-gradient(ellipse 40% 40% at 80% 50%, rgba(99, 102, 241, 0.05) 0%, transparent 60%),
    var(--bg-app);
  padding: 80px 0 100px;
  overflow: hidden;
  position: relative;
  border-bottom: 1px solid var(--border);
}

.hero::before {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(var(--border) 1px, transparent 1px),
    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 60px 60px;
  opacity: 0.3;
  pointer-events: none;
}

.hero-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--primary-light);
  border: 1px solid rgba(37, 99, 235, 0.2);
  padding: 6px 16px;
  border-radius: 30px;
  font-size: 13px;
  font-weight: 700;
  color: var(--primary);
  margin-bottom: 24px;
  box-shadow: 0 2px 8px rgba(37, 99, 235, 0.1);
}

.hero-title {
  font-size: clamp(36px, 5vw, 64px);
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.04em;
  line-height: 1.1;
  margin-bottom: 24px;
}

.hero-title .accent {
  color: var(--primary);
}

.hero-desc {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.8;
  max-width: 560px;
  margin-bottom: 40px;
}

.hero-actions {
  display: flex;
  gap: 16px;
  flex-wrap: wrap;
  margin-bottom: 56px;
}

/* Stats Bar */
.stats-bar {
  display: flex;
  gap: 0;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
  overflow: hidden;
  max-width: 520px;
}

.stat-item {
  flex: 1;
  padding: 20px 24px;
  text-align: center;
  border-right: 1px solid var(--border);
}

.stat-item:last-child {
  border-right: none;
}

.stat-num {
  font-size: 26px;
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.04em;
  line-height: 1;
}

.stat-txt {
  font-size: 12px;
  color: var(--text-muted);
  font-weight: 600;
  margin-top: 6px;
  text-transform: uppercase;
  letter-spacing: 0.05em;
}

/* Floating Cards */
.hero-card-float {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-lg);
  padding: 20px;
  width: 300px;
}

.hero-card-sm {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-md);
  padding: 14px 18px;
  position: absolute;
}

/* Sections */
.section {
  padding: 80px 0;
  border-bottom: 1px solid var(--border);
}

.section-alt {
  background: var(--bg-app);
}

.section-surface {
  background: var(--bg-surface);
}

.section-tag {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 12px;
}

.section-title {
  font-size: clamp(24px, 3.5vw, 36px);
  font-weight: 800;
  color: var(--text-main);
  letter-spacing: -0.03em;
  line-height: 1.2;
  margin-bottom: 16px;
}

.section-desc {
  font-size: 16px;
  color: var(--text-muted);
  line-height: 1.75;
  max-width: 540px;
}

/* Custom Journal & Article Cards */
.pub-card {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  transition: all 0.2s ease;
  text-decoration: none;
  display: block;
  height: 100%;
}

.pub-card:hover {
  box-shadow: var(--shadow-md);
  border-color: rgba(37, 99, 235, 0.4);
  transform: translateY(-4px);
}

.feature-item {
  display: flex;
  gap: 20px;
  padding: 24px;
  border-radius: var(--radius-lg);
  background: var(--bg-surface);
  border: 1px solid var(--border);
  height: 100%;
  transition: all 0.2s;
}

.feature-item:hover {
  box-shadow: var(--shadow-sm);
  border-color: var(--primary);
}

.feature-icon {
  width: 48px;
  height: 48px;
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 22px;
  flex-shrink: 0;
}

.cta-section {
  background: var(--text-main);
  padding: 100px 0;
  position: relative;
  overflow: hidden;
}

.cta-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 90% at 50% 50%, rgba(37, 99, 235, 0.15) 0%, transparent 70%);
}

@media(max-width:768px) {
  .hero {
    padding: 50px 0 60px;
  }

  .stats-bar {
    max-width: 100%;
  }
}

/* --- Reading Progress Bar --- */
.reading-progress-container {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 4px;
  background: transparent;
  z-index: 9999;
}

.reading-progress-bar {
  height: 4px;
  background: var(--primary);
  width: 0%;
  border-top-right-radius: 2px;
  border-bottom-right-radius: 2px;
}

/* --- Back to Top Button (FIXED) --- */
.back-to-top {
  position: fixed;
  bottom: 24px;
  right: 24px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--primary);
  color: #fff;
  border: none;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  box-shadow: var(--shadow-lg);
  opacity: 0;
  visibility: hidden;
  transform: translateY(20px);
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  z-index: 1000;
  cursor: pointer;
}

.back-to-top:hover {
  background: var(--primary-hover);
  transform: translateY(-4px) scale(1.05);
}

.back-to-top.show {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

/* --- Ultra Premium Charts & Elements --- */
.chart-container {
  position: relative;
  width: 100%;
  min-height: 300px;
  padding: 16px 0;
}

.chart-container-sm {
  min-height: 250px;
}

.apexcharts-tooltip {
  background: #1e293b !important;
  border: 1px solid #334155 !important;
  box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.1) !important;
  color: #fff;
  border-radius: 8px !important;
}

.apexcharts-tooltip-title {
  background: rgba(255, 255, 255, 0.05) !important;
  border-bottom: 1px solid rgba(255, 255, 255, 0.1) !important;
  font-family: 'Plus Jakarta Sans', sans-serif !important;
  font-weight: 600 !important;
  padding: 8px 12px !important;
}

.apexcharts-text {
  font-family: 'Plus Jakarta Sans', sans-serif !important;
  font-weight: 500;
  fill: #64748b;
}

.ds-card-glass {
  background: rgba(255, 255, 255, 0.6);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  border: 1px solid rgba(255, 255, 255, 0.8);
}

/* ─────────────────────────────────────────────────────────────
   PUBLIC FLASH MESSAGES (referenced in app.blade.php)
   ───────────────────────────────────────────────────────────── */
.pub-flash {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 12px 20px;
  font-size: 14px;
  font-weight: 500;
  border-left: 4px solid currentColor;
}

.pub-flash-suc {
  background: var(--success-bg);
  color: var(--success);
  border-color: var(--success);
}

.pub-flash-err {
  background: var(--danger-bg);
  color: var(--danger);
  border-color: var(--danger);
}

/* ─────────────────────────────────────────────────────────────
   HOVER UTILITY
   ───────────────────────────────────────────────────────────── */
.hover-primary {
  transition: color 0.2s;
}

.hover-primary:hover {
  color: var(--primary) !important;
}

.hover-shadow {
  transition: box-shadow 0.2s, transform 0.2s;
}

.hover-shadow:hover {
  box-shadow: var(--shadow-md);
  transform: translateY(-3px);
}

/* ─────────────────────────────────────────────────────────────
   @keyframes for hero floating badge
   ───────────────────────────────────────────────────────────── */
@keyframes float {

  0%,
  100% {
    transform: translateY(0px);
  }

  50% {
    transform: translateY(-10px);
  }
}

/* ─────────────────────────────────────────────────────────────
   RESPONSIVE — PUBLIC WEBSITE
   Breakpoints: xl ≥1200, lg ≥992, md ≥768, sm ≥576, xs <576
   ───────────────────────────────────────────────────────────── */

/* ── Prevent all horizontal overflow globally ── */
html,
body {
  overflow-x: hidden;
}

/* ── Containers: safe horizontal padding on all screens ── */
.container {
  padding-left: max(16px, env(safe-area-inset-left));
  padding-right: max(16px, env(safe-area-inset-right));
}

/* ── Section padding responsive ── */
@media (max-width: 991.98px) {
  .section {
    padding: 56px 0;
  }
}

@media (max-width: 767.98px) {
  .section {
    padding: 40px 0;
  }

  .hero {
    padding: 48px 0 56px;
  }
}

/* ── Hero section ── */
@media (max-width: 767.98px) {
  .hero-title {
    font-size: clamp(28px, 8vw, 44px) !important;
    letter-spacing: -0.02em;
  }

  .hero-desc {
    font-size: 15px;
    margin-bottom: 28px;
  }

  .hero-actions {
    gap: 12px;
  }
}

/* ── Hero search form (prevent button overflow) ── */
.hero-search-form {
  position: relative;
  max-width: 500px;
}

.hero-search-form input {
  padding-right: 100px !important;
}

@media (max-width: 480px) {
  .hero-search-form {
    max-width: 100%;
  }

  .hero-search-form .btn {
    position: relative !important;
    right: auto !important;
    top: auto !important;
    bottom: auto !important;
    margin-top: 8px;
    width: 100%;
    border-radius: 8px !important;
  }

  .hero-search-form {
    display: flex !important;
    flex-direction: column;
    gap: 8px;
  }

  .hero-search-form input {
    padding-right: 16px !important;
  }
}

/* ── Navbar mobile actions (touch-friendly) ── */
@media (max-width: 991.98px) {
  .pub-navbar .d-flex.align-items-center.gap-3 {
    flex-wrap: wrap;
    gap: 8px !important;
    padding: 12px 0;
  }

  .pub-navbar .btn {
    min-height: 44px;
    font-size: 14px;
  }
}

/* ── Footer ── */
@media (max-width: 767.98px) {
  .pub-footer {
    padding: 40px 0 16px !important;
    margin-top: 0 !important;
  }

  .pub-footer .col-6.col-lg-2 {
    min-width: 0;
  }

  .pub-footer hr {
    margin: 32px 0 16px !important;
  }
}

/* ── Articles index: filter sidebar toggle button ── */
.filter-toggle-btn {
  display: none;
  width: 100%;
  text-align: left;
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  padding: 12px 16px;
  font-weight: 700;
  font-size: 14px;
  color: var(--text-main);
  cursor: pointer;
  margin-bottom: 12px;
  align-items: center;
  gap: 8px;
}

.filter-toggle-btn i.chevron {
  transition: transform 0.25s;
}

.filter-toggle-btn.open i.chevron {
  transform: rotate(180deg);
}

@media (max-width: 991.98px) {
  .filter-toggle-btn {
    display: flex;
  }

  .filter-sidebar-body {
    display: none;
  }

  .filter-sidebar-body.open {
    display: block;
  }
}

/* ── Article show: sidebar reorder on mobile ── */
@media (max-width: 991.98px) {
  .article-sidebar {
    order: -1;
    margin-bottom: 24px;
  }

  .article-sidebar>div {
    position: static !important;
  }
}

/* ── DOI / monospace overflow fix ── */
.doi-text {
  word-break: break-all;
  overflow-wrap: anywhere;
}

/* ── pub-card responsive padding ── */
@media (max-width: 575.98px) {
  .pub-card {
    padding: 16px !important;
  }

  .contact-form-card {
    padding: 20px !important;
  }
}

/* ── Search box on mobile ── */
@media (max-width: 575.98px) {
  .search-box-wrap {
    flex-direction: column !important;
    gap: 8px !important;
    padding: 8px !important;
    border-radius: 12px !important;
  }

  .search-box-wrap button {
    height: 44px !important;
    border-radius: 8px !important;
    width: 100%;
    position: static !important;
  }

  .search-box-wrap input {
    width: 100% !important;
    height: 44px;
    border-radius: 8px !important;
  }
}

/* ── Statistics text overflow ── */
@media (max-width: 575.98px) {
  .stat-label-text {
    font-size: 11px !important;
    letter-spacing: 0.03em !important;
  }
}

/* ── Touch targets — minimum 44px height ── */
@media (max-width: 991.98px) {

  .btn,
  .ds-btn,
  .nav-link,
  .sidebar-link,
  button[type="submit"] {
    min-height: 44px;
  }

  a.footer-link {
    padding: 6px 0 !important;
    min-height: 36px;
    display: flex;
    align-items: center;
  }
}

/* ── Table: make scrollable on mobile, never clip ── */
.table-responsive {
  -webkit-overflow-scrolling: touch;
}

/* ── Images safe ── */
img {
  max-width: 100%;
  height: auto;
  display: block;
}

/* ── Inline-style font-size override helper ── */
@media (max-width: 767.98px) {

  h1[style*="font-size:42px"],
  h1[style*="font-size: 42px"] {
    font-size: clamp(24px, 7vw, 36px) !important;
  }

  h1[style*="font-size:36px"],
  h1[style*="font-size: 36px"] {
    font-size: clamp(22px, 6vw, 32px) !important;
  }

  h1[style*="font-size:32px"],
  h1[style*="font-size: 32px"] {
    font-size: clamp(20px, 5.5vw, 28px) !important;
  }
}

/* ── Journals & articles index header ── */
@media (max-width: 767.98px) {
  .page-hdr-section {
    padding: 32px 0 20px !important;
  }
}