/**
 * =============================================================================
 * Kazi Nazrul Academy — Shared Modular Portal Header & Footer Stylesheet
 * File: css/portal-components.css
 * Architecture: Reusable portal chrome for Student Portal & Admission Portal
 * Does NOT touch or alter the global website header/footer (js/components.js)
 * =============================================================================
 */

:root {
  --kna-portal-navy-950: #020617;
  --kna-portal-navy-900: #0f172a;
  --kna-portal-navy-800: #1e293b;
  --kna-portal-slate-700: #334155;
  --kna-portal-slate-600: #475569;
  --kna-portal-slate-500: #64748b;
  --kna-portal-slate-400: #94a3b8;
  --kna-portal-slate-200: #e2e8f0;
  --kna-portal-slate-100: #f1f5f9;
  --kna-portal-slate-50:  #f8fafc;
  --kna-portal-sky-700:   #0369a1;
  --kna-portal-sky-600:   #0284c7;
  --kna-portal-sky-500:   #0ea5e9;
  --kna-portal-sky-400:   #38bdf8;
  --kna-portal-sky-100:   #e0f2fe;
  --kna-portal-sky-50:    #f0f9ff;
  --kna-portal-emerald:   #10b981;
  --kna-portal-emerald-bg:#f0fdf4;
  --kna-portal-amber:     #f59e0b;
  --kna-portal-amber-bg:  #fffbeb;
  --kna-portal-font:      'Plus Jakarta Sans', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
  --kna-portal-h-height:  66px;
}

/* =============================================================================
   1. PORTAL HEADER
   ============================================================================= */
.kna-portal-header {
  position: sticky;
  top: 0;
  left: 0;
  right: 0;
  height: var(--kna-portal-h-height);
  background: #ffffff;
  border-bottom: 1px solid var(--kna-portal-slate-200);
  box-shadow: 0 2px 10px rgba(15, 23, 42, 0.04);
  z-index: 1000;
  font-family: var(--kna-portal-font);
}

.kna-portal-h-container {
  max-width: 1240px;
  height: 100%;
  margin: 0 auto;
  padding: 0 20px;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 16px;
}

/* Brand Section */
.kna-portal-brand {
  display: flex;
  align-items: center;
  gap: 12px;
  text-decoration: none;
  color: inherit;
  flex-shrink: 0;
}

.kna-portal-logo-picture {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.kna-portal-logo {
  width: 42px;
  height: 42px;
  object-fit: contain;
  flex-shrink: 0;
  filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.08));
}

.kna-portal-brand-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.kna-portal-school-name {
  font-size: 1.02rem;
  font-weight: 800;
  color: var(--kna-portal-navy-900);
  letter-spacing: -0.01em;
  white-space: nowrap;
}

.kna-portal-badge-wrap {
  display: flex;
  align-items: center;
  gap: 6px;
  margin-top: 2px;
}

.kna-portal-badge-label {
  font-size: 0.72rem;
  font-weight: 700;
  color: var(--kna-portal-sky-600);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  white-space: nowrap;
}

.kna-portal-badge-tag {
  font-size: 0.65rem;
  font-weight: 800;
  padding: 1px 6px;
  border-radius: 4px;
  background: var(--kna-portal-sky-100);
  color: var(--kna-portal-sky-700);
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

/* Middle Navigation */
.kna-portal-nav {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 0 auto 0 24px;
}

.kna-portal-nav-link {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 7px 16px;
  color: var(--kna-portal-slate-600);
  text-decoration: none;
  font-size: 0.84rem;
  font-weight: 600;
  border-radius: 9999px;
  border: 1px solid transparent;
  transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
}

.kna-portal-nav-link i {
  font-size: 0.82rem;
  color: var(--kna-portal-slate-500);
  transition: color 0.18s ease;
}

.kna-portal-nav-link:hover {
  background: var(--kna-portal-slate-100);
  color: var(--kna-portal-navy-900);
  border-color: var(--kna-portal-slate-200);
}

.kna-portal-nav-link:hover i {
  color: var(--kna-portal-sky-600);
}

.kna-portal-nav-link.active {
  background: #f0f9ff;
  color: #0284c7;
  border-color: #bae6fd;
  font-weight: 700;
  box-shadow: 0 1px 2px rgba(2, 132, 199, 0.08);
}

.kna-portal-nav-link.active i {
  color: #0284c7;
}

/* Header Right Actions */
.kna-portal-right {
  display: flex;
  align-items: center;
  gap: 12px;
  flex-shrink: 0;
  margin-left: auto;
}

.kna-portal-session-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: var(--kna-portal-slate-100);
  color: var(--kna-portal-slate-600);
  border: 1px solid var(--kna-portal-slate-200);
  padding: 5px 12px;
  border-radius: 9999px;
  font-size: 0.76rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  white-space: nowrap;
}

.kna-portal-session-pill i {
  color: var(--kna-portal-sky-600);
  font-size: 0.74rem;
}

.kna-portal-user-chip {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 3px 12px 3px 3px;
  background: #ffffff;
  border: 1px solid var(--kna-portal-slate-200);
  border-radius: 9999px;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.04);
}

.kna-portal-user-chip:hover {
  background: #ffffff;
  border-color: var(--kna-portal-sky-400);
  box-shadow: 0 2px 8px rgba(14, 165, 233, 0.12);
}

.kna-portal-avatar {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  background: linear-gradient(135deg, var(--kna-portal-sky-100) 0%, #bae6fd 100%);
  color: var(--kna-portal-sky-700);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  font-size: 0.85rem;
  flex-shrink: 0;
  overflow: hidden;
  border: 1.5px solid #ffffff;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.08);
}

.kna-portal-avatar img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.kna-portal-user-meta {
  display: flex;
  flex-direction: column;
  line-height: 1.15;
}

.kna-portal-user-name {
  font-size: 0.82rem;
  font-weight: 700;
  color: var(--kna-portal-navy-900);
  max-width: 130px;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.kna-portal-user-sub {
  font-size: 0.68rem;
  font-weight: 600;
  color: var(--kna-portal-slate-500);
}

.kna-portal-btn-logout {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  background: transparent;
  color: var(--kna-portal-slate-600);
  border: 1px solid var(--kna-portal-slate-200);
  padding: 7px 14px;
  border-radius: 8px;
  font-family: var(--kna-portal-font);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s ease;
  white-space: nowrap;
}

.kna-portal-btn-logout:hover {
  background: #fef2f2;
  color: #dc2626;
  border-color: #fecaca;
}

/* =============================================================================
   Interactive Account Dropdown System
   ============================================================================= */
.kna-portal-account-wrapper {
  position: relative;
  display: inline-block;
}

.kna-portal-chip-chevron {
  font-size: 0.65rem;
  color: var(--kna-portal-slate-400);
  margin-left: 2px;
  transition: transform 0.2s ease;
}

.kna-portal-user-chip[aria-expanded="true"] .kna-portal-chip-chevron {
  transform: rotate(180deg);
}

.kna-portal-account-menu {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 260px;
  background: #ffffff;
  border: 1px solid var(--kna-portal-slate-200);
  border-radius: 12px;
  box-shadow: 0 10px 25px -5px rgba(15, 23, 42, 0.12), 0 8px 10px -6px rgba(15, 23, 42, 0.04);
  padding: 8px;
  z-index: 1050;
  opacity: 0;
  visibility: hidden;
  transform: translateY(-8px);
  transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
}

.kna-portal-account-menu.open {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.kna-portal-acc-header {
  padding: 10px 12px;
  background: var(--kna-portal-slate-50);
  border-radius: 8px;
  margin-bottom: 6px;
}

.kna-portal-acc-name {
  font-size: 0.88rem;
  font-weight: 800;
  color: var(--kna-portal-navy-900);
  line-height: 1.2;
}

.kna-portal-acc-email {
  font-size: 0.75rem;
  color: var(--kna-portal-slate-500);
  margin-top: 2px;
  word-break: break-all;
}

.kna-portal-acc-id-badge {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  margin-top: 6px;
  padding: 3px 8px;
  background: var(--kna-portal-sky-100);
  border: 1px solid var(--kna-portal-sky-200);
  color: var(--kna-portal-sky-800);
  border-radius: 6px;
  font-size: 0.72rem;
  font-weight: 700;
  font-family: monospace;
}

.kna-portal-acc-divider {
  height: 1px;
  background: var(--kna-portal-slate-200);
  margin: 6px 0;
}

.kna-portal-acc-item {
  display: flex;
  align-items: center;
  gap: 10px;
  width: 100%;
  padding: 8px 12px;
  border: none;
  background: transparent;
  color: var(--kna-portal-slate-700);
  font-family: var(--kna-portal-font);
  font-size: 0.82rem;
  font-weight: 600;
  border-radius: 6px;
  cursor: pointer;
  text-decoration: none;
  transition: all 0.15s ease;
  box-sizing: border-box;
}

.kna-portal-acc-item i {
  font-size: 0.85rem;
  color: var(--kna-portal-slate-400);
  width: 16px;
  text-align: center;
}

.kna-portal-acc-item:hover {
  background: var(--kna-portal-slate-100);
  color: var(--kna-portal-navy-900);
}

.kna-portal-acc-item:hover i {
  color: var(--kna-portal-sky-600);
}

.kna-portal-acc-item.kna-portal-acc-logout {
  color: #dc2626;
}

.kna-portal-acc-item.kna-portal-acc-logout:hover {
  background: #fef2f2;
  color: #b91c1c;
}

.kna-portal-acc-item.kna-portal-acc-logout i {
  color: #ef4444;
}

.kna-portal-home-link {
  display: inline-flex;
  align-items: center;
  gap: 7px;
  color: var(--kna-portal-slate-600);
  background: #ffffff;
  text-decoration: none;
  font-size: 0.82rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: 9999px;
  border: 1px solid var(--kna-portal-slate-200);
  transition: all 0.18s cubic-bezier(0.16, 1, 0.3, 1);
  white-space: nowrap;
  box-shadow: 0 1px 2px rgba(15, 23, 42, 0.03);
}

.kna-portal-home-link i {
  font-size: 0.8rem;
  color: var(--kna-portal-slate-500);
  transition: color 0.18s ease;
}

.kna-portal-home-link:hover {
  background: var(--kna-portal-slate-50);
  border-color: var(--kna-portal-slate-300);
  color: var(--kna-portal-navy-900);
  box-shadow: 0 2px 6px rgba(15, 23, 42, 0.06);
}

.kna-portal-home-link:hover i {
  color: var(--kna-portal-sky-600);
}

/* =============================================================================
   2. PORTAL FOOTER
   ============================================================================= */
.kna-portal-footer {
  background: var(--kna-portal-navy-900);
  color: var(--kna-portal-slate-400);
  font-family: var(--kna-portal-font);
  border-top: 1px solid rgba(255, 255, 255, 0.08);
  padding: 24px 0 20px;
  margin-top: auto;
}

/* Loading State Safety: Prevent footer from flashing or jumping up into viewport during page load */
body.portal-loading .kna-portal-footer,
.portal-loading .kna-portal-footer,
#portal-footer-placeholder.portal-loading,
#portal-footer-placeholder[style*="display: none"],
#portal-footer-placeholder[style*="display:none"] {
  display: none !important;
}

/* Standardized Opaque Portal Auth Loader Overlay */
.kna-auth-loader {
  position: fixed;
  inset: 0;
  background: #f8fafc;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 99999;
  transition: opacity 0.25s ease, visibility 0.25s ease;
}

.kna-portal-f-container {
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 20px;
}

.kna-portal-f-grid {
  display: grid;
  grid-template-columns: 1.4fr 1fr 1fr;
  gap: 24px;
  align-items: center;
  padding-bottom: 20px;
  border-bottom: 1px solid rgba(255, 255, 255, 0.08);
}

.kna-portal-f-brand {
  display: flex;
  align-items: center;
  gap: 12px;
}

.kna-portal-f-logo-picture {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.kna-portal-f-logo {
  width: 38px;
  height: 38px;
  object-fit: contain;
  flex-shrink: 0;
}

.kna-portal-f-title {
  font-size: 0.96rem;
  font-weight: 800;
  color: #ffffff;
  letter-spacing: -0.01em;
}

.kna-portal-f-desc {
  font-size: 0.74rem;
  color: #94a3b8;
  margin-top: 2px;
  line-height: 1.4;
}

.kna-portal-f-links {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  flex-wrap: wrap;
}

.kna-portal-f-links a {
  color: #94a3b8;
  text-decoration: none;
  font-size: 0.8rem;
  font-weight: 600;
  display: inline-flex;
  align-items: center;
  gap: 6px;
  transition: color 0.15s ease;
}

.kna-portal-f-links a:hover {
  color: var(--kna-portal-sky-400);
}

.kna-portal-f-contacts {
  display: flex;
  flex-direction: column;
  align-items: flex-end;
  gap: 4px;
}

.kna-portal-f-phone {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #f1f5f9;
  font-size: 0.82rem;
  font-weight: 700;
  text-decoration: none;
}

.kna-portal-f-phone i {
  color: var(--kna-portal-sky-400);
}

.kna-portal-f-wa {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: #86efac;
  font-size: 0.78rem;
  font-weight: 600;
  text-decoration: none;
}

.kna-portal-f-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 10px;
  padding-top: 14px;
  font-size: 0.74rem;
  color: #64748b;
}

.kna-portal-f-bottom a {
  color: #94a3b8;
  text-decoration: none;
}

.kna-portal-f-bottom a:hover {
  color: #ffffff;
}

/* =============================================================================
   3. RESPONSIVE BREAKPOINTS
   ============================================================================= */
@media (max-width: 992px) {
  .kna-portal-f-grid {
    grid-template-columns: 1fr;
    text-align: center;
    gap: 18px;
  }
  .kna-portal-f-brand {
    justify-content: center;
  }
  .kna-portal-f-contacts {
    align-items: center;
  }
  .kna-portal-f-bottom {
    justify-content: center;
    text-align: center;
  }
}

@media (max-width: 640px) {
  .kna-portal-header {
    height: 58px;
  }
  :root {
    --kna-portal-h-height: 58px;
  }
  .kna-portal-h-container {
    padding: 0 14px;
    gap: 10px;
  }
  .kna-portal-right {
    gap: 8px;
  }
  .kna-portal-school-name {
    font-size: 0.88rem;
  }
  .kna-portal-badge-label {
    font-size: 0.65rem;
  }
  .kna-portal-badge-tag {
    font-size: 0.62rem;
  }
  .kna-portal-session-pill {
    display: none;
  }
  .kna-portal-account-menu {
    max-width: calc(100vw - 28px);
    right: 0;
  }
}

@media (max-width: 520px) {
  .kna-portal-user-meta {
    display: none;
  }
}

@media (max-width: 580px) {
  .kna-portal-home-link span {
    display: none;
  }
  .kna-portal-home-link {
    padding: 7px 11px;
  }
  .kna-portal-school-name {
    font-size: 0.88rem;
    max-width: 170px;
    overflow: hidden;
    text-overflow: ellipsis;
  }
}

/* =============================================================================
   Student Portal Integration Compatibility
   ============================================================================= */
.sp-nav-bar {
  top: var(--kna-portal-h-height, 66px) !important;
}

@media (max-width: 640px) {
  .sp-nav-bar {
    top: 58px !important;
  }
}