@import url('https://fonts.googleapis.com/css2?family=Inter:wght@400;500;600&display=swap');

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

:root {
  --color-primary:       #1a4f7a;
  --color-primary-light: #2e6da4;
  --color-accent:        #e8f0f8;
  --color-surface:       #ffffff;
  --color-bg:            #f4f6f8;
  --color-text:          #1a1a2e;
  --color-text-muted:    #5a6a7a;
  --color-border:        #dce3ea;
  --color-success:       #2d7a4f;
  --color-error:         #b83232;

  --font-base: 'Inter', system-ui, sans-serif;
  --size-xs:   0.75rem;
  --size-sm:   0.875rem;
  --size-base: 1rem;
  --size-lg:   1.125rem;
  --size-xl:   1.375rem;
  --size-2xl:  1.75rem;
  --size-3xl:  2.25rem;

  --radius: 6px;
  --max-width: 1040px;

  /* Aliases so legacy inline-style var() references still resolve */
  --accent:      #2e6da4;
  --accent-dark: #1a4f7a;
  --accent-light: #e8f0f8;
  --white:       #ffffff;
  --gray-100: #f4f6f8;
  --gray-200: #dce3ea;
  --gray-300: #dce3ea;
  --gray-600: #5a6a7a;
  --gray-700: #1a1a2e;
  --gray-900: #1a1a2e;
}

body {
  font-family: var(--font-base);
  font-size: var(--size-base);
  line-height: 1.65;
  color: var(--color-text);
  background: var(--color-bg);
}

/* ── Header ───────────────────────────────────────── */

.site-header {
  background: var(--color-primary);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 3px rgba(0,0,0,0.12);
}

.header-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 64px;
}

@media (min-width: 1024px) {
  .header-inner { padding: 0 48px; }
}

.logo {
  display: flex;
  flex-direction: column;
  text-decoration: none;
  line-height: 1.2;
  gap: 1px;
}

.logo-name {
  font-size: var(--size-lg);
  font-weight: 600;
  color: #ffffff;
  letter-spacing: -0.01em;
}

.logo-sub {
  font-size: var(--size-xs);
  color: rgba(255,255,255,0.65);
}

.hamburger {
  display: flex;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 6px;
}

.hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: #ffffff;
  border-radius: 2px;
  transition: all 0.15s;
}

/* Mobile nav: hidden by default, revealed by .open */
.main-nav {
  display: none;
  position: absolute;
  top: 64px;
  left: 0;
  right: 0;
  background: var(--color-primary);
  flex-direction: column;
  align-items: stretch;
  padding: 12px 24px 16px;
  gap: 2px;
  box-shadow: 0 4px 8px rgba(0,0,0,0.12);
  z-index: 99;
}

.main-nav.open { display: flex; }

.main-nav a {
  color: #ffffff;
  text-decoration: none;
  padding: 10px 14px;
  font-size: var(--size-sm);
  font-weight: 500;
  white-space: nowrap;
  width: 100%;
  border-bottom: 2px solid transparent;
}

.main-nav a:hover { text-decoration: underline; }

.main-nav a.active {
  border-bottom-color: rgba(255,255,255,0.8);
}

.nav-separator {
  width: 100%;
  height: 1px;
  background: rgba(255,255,255,0.2);
  margin: 4px 0;
  flex-shrink: 0;
}

.btn-logout {
  background: transparent;
  border: none;
  color: rgba(255,255,255,0.75);
  padding: 10px 14px;
  font-size: var(--size-sm);
  font-weight: 500;
  cursor: pointer;
  font-family: inherit;
  white-space: nowrap;
  text-align: left;
  width: 100%;
  transition: color 0.15s;
}

.btn-logout:hover { color: var(--color-error); }

@media (min-width: 640px) {
  .hamburger { display: none; }

  .main-nav {
    display: flex;
    position: static;
    flex-direction: row;
    align-items: center;
    gap: 4px;
    padding: 0;
    background: transparent;
    box-shadow: none;
    z-index: auto;
  }

  .main-nav a {
    padding: 6px 12px;
    width: auto;
    padding-bottom: 4px;
  }

  .nav-separator {
    width: 1px;
    height: 20px;
    margin: 0 8px;
  }

  .btn-logout {
    padding: 6px 12px;
    width: auto;
  }
}

/* ── Layout ───────────────────────────────────────── */

.main-content {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 48px 24px;
}

@media (min-width: 1024px) {
  .main-content { padding: 48px 48px; }
}

/* ── Greeting band (dashboard only) ──────────────── */

.greeting-band {
  background: var(--color-accent);
  width: 100%;
}

.greeting-inner {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 40px 24px;
}

@media (min-width: 1024px) {
  .greeting-inner { padding: 40px 48px; }
}

.greeting-inner h1 {
  font-size: var(--size-2xl);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.01em;
  line-height: 1.25;
}

.greeting-inner p {
  color: var(--color-text-muted);
  font-size: var(--size-lg);
  margin-top: 6px;
}

/* ── Page header (inner pages) ────────────────────── */

.page-header {
  margin-bottom: 32px;
}

.page-header h1 {
  font-size: var(--size-2xl);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.01em;
  line-height: 1.25;
  margin-bottom: 6px;
}

.page-header p {
  color: var(--color-text-muted);
  font-size: var(--size-lg);
}

/* ── Breadcrumb ───────────────────────────────────── */

.breadcrumb {
  display: flex;
  align-items: center;
  gap: 6px;
  font-size: var(--size-sm);
  color: var(--color-text-muted);
  padding: 16px 0;
  flex-wrap: wrap;
}

.breadcrumb a {
  color: var(--color-text-muted);
  text-decoration: none;
}

.breadcrumb a:hover {
  text-decoration: underline;
  color: var(--color-text);
}

.breadcrumb span { color: var(--color-text-muted); }
.breadcrumb span:last-child { color: var(--color-text); }

/* ── Section headings ─────────────────────────────── */

.section-title,
.quick-links h2 {
  font-size: var(--size-xl);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.01em;
  line-height: 1.25;
  margin-bottom: 24px;
  border-left: 3px solid var(--color-primary);
  padding-left: 14px;
}

/* ── Cards ────────────────────────────────────────── */

.card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
  transition: box-shadow 0.15s ease, border-color 0.15s ease;
  display: flex;
  flex-direction: column;
}

.card:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.10);
  border-color: var(--color-primary-light);
}

.card-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 24px;
}

@media (min-width: 640px) {
  .card-grid { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .card-grid { grid-template-columns: repeat(3, 1fr); }
}

.card-icon-box {
  width: 44px;
  height: 44px;
  background: var(--color-accent);
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 20px;
  margin-bottom: 16px;
  flex-shrink: 0;
}

/* Fallback for old .card-icon span usage */
.card-icon {
  font-size: 1.5rem;
  display: block;
  margin-bottom: 12px;
}

.card h3 {
  font-size: var(--size-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
  line-height: 1.25;
}

.card p {
  color: var(--color-text-muted);
  font-size: var(--size-sm);
  line-height: 1.65;
  margin-bottom: 16px;
  flex: 1;
}

.card-link {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  color: var(--color-primary-light);
  font-weight: 500;
  font-size: var(--size-sm);
  text-decoration: none;
  opacity: 0;
  transition: opacity 0.15s;
  margin-top: auto;
}

.card:hover .card-link { opacity: 1; }
.card-link:hover { text-decoration: underline; }

/* ── Buttons ──────────────────────────────────────── */

.btn {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 10px 24px;
  border-radius: 4px;
  font-size: var(--size-sm);
  font-weight: 500;
  cursor: pointer;
  text-decoration: none;
  border: none;
  font-family: inherit;
  transition: background 0.15s;
  line-height: 1;
}

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

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  transition: background 0.15s, border-color 0.15s;
}

.btn-secondary:hover { background: var(--color-accent); }

.btn-sm { padding: 6px 16px; font-size: var(--size-xs); }

/* ── Forms ────────────────────────────────────────── */

.form-group { margin-bottom: 20px; }

.form-group label {
  display: block;
  font-size: var(--size-sm);
  font-weight: 500;
  color: var(--color-text);
  margin-bottom: 6px;
}

.form-group input,
.form-group select,
.form-group textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--color-border);
  border-radius: 4px;
  font-size: var(--size-base);
  font-family: inherit;
  color: var(--color-text);
  background: #ffffff;
  transition: border-color 0.15s, box-shadow 0.15s;
  appearance: auto;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
  outline: none;
  border-color: var(--color-primary-light);
  box-shadow: 0 0 0 3px rgba(46,109,164,0.12);
}

.form-group input.error,
.form-group textarea.error { border-color: var(--color-error); }

.form-group textarea { min-height: 120px; resize: vertical; }

.field-hint {
  display: block;
  font-size: var(--size-xs);
  color: var(--color-text-muted);
  margin-top: 4px;
}

/* ── Tabs ─────────────────────────────────────────── */

.tabs { margin-top: 8px; }

.tab-list {
  display: flex;
  border-bottom: 2px solid var(--color-border);
  margin-bottom: 28px;
  overflow-x: auto;
}

.tab-btn {
  padding: 12px 20px;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  font-size: var(--size-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  cursor: pointer;
  white-space: nowrap;
  font-family: inherit;
  transition: color 0.15s, border-color 0.15s;
}

.tab-btn:hover { color: var(--color-text); }

.tab-btn.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.tab-panel { display: none; }
.tab-panel.active { display: block; }

.tab-panel h2 {
  font-size: var(--size-xl);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.01em;
  line-height: 1.25;
  margin-bottom: 16px;
}

.tab-panel p {
  color: var(--color-text);
  margin-bottom: 14px;
  line-height: 1.65;
}

/* ── Accordion ────────────────────────────────────── */

.accordion {
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  overflow: hidden;
}

.accordion-item { border-bottom: 1px solid var(--color-border); }
.accordion-item:last-child { border-bottom: none; }

.accordion-btn {
  width: 100%;
  background: var(--color-surface);
  border: none;
  padding: 16px 20px;
  text-align: left;
  font-size: var(--size-base);
  font-weight: 500;
  color: var(--color-text);
  cursor: pointer;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 12px;
  font-family: inherit;
  transition: background 0.15s;
}

.accordion-btn:hover { background: var(--color-accent); }

.accordion-btn.active {
  background: var(--color-accent);
  color: var(--color-primary);
}

.accordion-icon {
  font-size: var(--size-base);
  transition: transform 0.15s;
  color: var(--color-text-muted);
  flex-shrink: 0;
}

.accordion-btn.active .accordion-icon {
  transform: rotate(180deg);
  color: var(--color-primary);
}

.accordion-body {
  display: none;
  padding: 16px 20px;
  background: var(--color-bg);
  color: var(--color-text);
  line-height: 1.65;
  font-size: var(--size-sm);
}

.accordion-body.open { display: block; }

/* ── Table ────────────────────────────────────────── */

.table-wrapper { overflow-x: auto; }

.data-table {
  width: 100%;
  border-collapse: collapse;
  font-size: var(--size-sm);
}

.data-table th {
  background: var(--color-accent);
  padding: 14px 16px;
  text-align: left;
  font-weight: 600;
  font-size: var(--size-sm);
  color: var(--color-text);
}

.data-table td {
  padding: 14px 16px;
  border-bottom: 1px solid var(--color-border);
  color: var(--color-text);
  vertical-align: middle;
}

.data-table tr:nth-child(even) td { background: #fafbfc; }
.data-table tr:hover td { background: var(--color-accent); }

.badge {
  display: inline-block;
  padding: 2px 8px;
  border-radius: 99px;
  font-size: var(--size-xs);
  font-weight: 600;
  background: var(--color-accent);
  color: var(--color-primary);
  letter-spacing: 0.02em;
}

.badge-pdf,
.badge-docx,
.badge-xlsx,
.badge-pptx {
  background: var(--color-accent);
  color: var(--color-primary);
}

/* ── Forum threads ────────────────────────────────── */

.forum-thread {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 28px;
  margin-bottom: 16px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
  transition: box-shadow 0.15s ease, border-color 0.15s ease;
}

.forum-thread:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.10);
  border-color: var(--color-primary-light);
}

.forum-thread h3 {
  font-size: var(--size-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 6px;
  line-height: 1.25;
}

.forum-meta {
  font-size: var(--size-xs);
  color: var(--color-text-muted);
  margin-bottom: 12px;
}

.forum-preview {
  color: var(--color-text);
  font-size: var(--size-sm);
  margin-bottom: 16px;
  line-height: 1.65;
  display: -webkit-box;
  -webkit-line-clamp: 3;
  -webkit-box-orient: vertical;
  overflow: hidden;
}

/* ── Notice ───────────────────────────────────────── */

.notice {
  background: var(--color-accent);
  border-left: 3px solid var(--color-primary);
  padding: 12px 16px;
  border-radius: 0 var(--radius) var(--radius) 0;
  color: var(--color-text);
  margin-bottom: 32px;
  font-size: var(--size-sm);
}

/* ── Alerts ───────────────────────────────────────── */

.alert {
  padding: 12px 16px;
  border-radius: 4px;
  margin-bottom: 20px;
  font-size: var(--size-sm);
}

.alert-success {
  background: #edf7f1;
  border-left: 3px solid var(--color-success);
  color: var(--color-success);
}

.alert-error {
  background: #fdf0f0;
  border-left: 3px solid var(--color-error);
  color: var(--color-error);
}

/* ── Quick links ──────────────────────────────────── */

.quick-links {
  margin-top: 48px;
  padding-top: 40px;
  border-top: 1px solid var(--color-border);
}

.quick-links-grid {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
}

@media (min-width: 640px) {
  .quick-links-grid { grid-template-columns: repeat(3, 1fr); }
}

.quick-link-card {
  display: flex;
  align-items: center;
  gap: 14px;
  padding: 20px;
  background: var(--color-surface);
  border-radius: var(--radius);
  text-decoration: none;
  color: var(--color-text);
  border: 1px solid var(--color-border);
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
  transition: box-shadow 0.15s ease, border-color 0.15s ease;
}

.quick-link-card:hover {
  box-shadow: 0 4px 12px rgba(0,0,0,0.10);
  border-color: var(--color-primary-light);
}

.quick-link-icon { font-size: 1.5rem; flex-shrink: 0; }

.quick-link-label {
  font-weight: 600;
  font-size: var(--size-base);
  color: var(--color-text);
}

.quick-link-sub {
  font-size: var(--size-xs);
  color: var(--color-text-muted);
  font-weight: 400;
  margin-top: 2px;
}

/* ── Suggestion cards ─────────────────────────────── */

.suggestion-cards {
  display: grid;
  grid-template-columns: 1fr;
  gap: 16px;
  margin-top: 20px;
}

@media (min-width: 640px) {
  .suggestion-cards { grid-template-columns: repeat(3, 1fr); }
}

.suggestion-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 20px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

.suggestion-card h4 {
  font-size: var(--size-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: 8px;
  line-height: 1.25;
}

.suggestion-card p {
  font-size: var(--size-sm);
  color: var(--color-text-muted);
  line-height: 1.65;
}

/* ── Login page ───────────────────────────────────── */

.login-page {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  padding: 24px;
}

.login-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 40px;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

@media (max-width: 480px) {
  .login-card { padding: 32px 24px; }
}

.login-logo {
  text-align: center;
  margin-bottom: 28px;
}

.login-logo-icon {
  font-size: 2rem;
  display: block;
  margin-bottom: 10px;
}

.login-logo-text {
  display: block;
  font-size: var(--size-xl);
  font-weight: 600;
  color: var(--color-primary);
}

.login-logo-sub {
  display: block;
  font-size: var(--size-sm);
  color: var(--color-text-muted);
  margin-top: 4px;
}

.login-tabs {
  display: flex;
  border-bottom: 2px solid var(--color-border);
  margin-bottom: 28px;
}

.login-tab {
  flex: 1;
  padding: 12px 8px;
  background: none;
  border: none;
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  font-size: var(--size-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  cursor: pointer;
  font-family: inherit;
  transition: color 0.15s, border-color 0.15s;
}

.login-tab:hover { color: var(--color-text); }

.login-tab.active {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary);
}

.login-panel { display: none; }
.login-panel.active { display: block; }

.forgot-divider {
  height: 1px;
  background: var(--color-border);
  margin: 20px 0;
}

.text-link {
  color: var(--color-primary-light);
  font-size: var(--size-sm);
  text-decoration: none;
}

.text-link:hover { text-decoration: underline; }

.login-centered {
  text-align: center;
  margin-top: 14px;
}

/* ── Reset password ───────────────────────────────── */

.reset-card {
  background: var(--color-surface);
  border: 1px solid var(--color-border);
  border-radius: var(--radius);
  padding: 40px;
  width: 100%;
  max-width: 420px;
  box-shadow: 0 1px 4px rgba(0,0,0,0.06);
}

.reset-card h1 {
  font-size: var(--size-xl);
  font-weight: 600;
  color: var(--color-text);
  letter-spacing: -0.01em;
  margin-bottom: 8px;
  line-height: 1.25;
}

.reset-card .sub {
  color: var(--color-text-muted);
  font-size: var(--size-sm);
  margin-bottom: 28px;
}

/* ── Footer ───────────────────────────────────────── */

.site-footer {
  background: var(--color-primary);
  padding: 24px 48px;
  text-align: center;
  color: rgba(255,255,255,0.75);
  font-size: var(--size-sm);
  margin-top: 80px;
}