/* ═══════════════════════════════════════════════════════════════════════
   Student Management System – Modern Navbar Stylesheet
   ═══════════════════════════════════════════════════════════════════════ */

/* ── Variables ── */
:root {
  --sms-primary: #17ed3e;
  --sms-primary-dark: #1b831a;
  --sms-primary-light: #eff6ff;
  --sms-navy: #0f172a;
  --sms-gray-50: #f8fafc;
  --sms-gray-100: #f1f5f9;
  --sms-gray-200: #e2e8f0;
  --sms-gray-300: #cbd5e1;
  --sms-gray-400: #94a3b8;
  --sms-gray-500: #64748b;
  --sms-gray-600: #475569;
  --sms-gray-700: #334155;
  --sms-radius: 14px;
  --sms-radius-sm: 10px;
  --sms-font: 'Inter', system-ui, -apple-system, sans-serif;
}

/* ── Reset for navbar scope ── */
.sms-navbar,
.sms-navbar *,
.sms-navbar *::before,
.sms-navbar *::after {
  box-sizing: border-box;
  font-family: var(--sms-font);
}

/* ── Sticky Navbar ── */
.sms-navbar {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 9999;
  background: rgba(255, 255, 255, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(226, 232, 240, 0.6);
  transition: box-shadow 0.3s ease;
  box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

.sms-navbar.scrolled {
  box-shadow: 0 4px 20px -4px rgba(0, 0, 0, 0.1),
              0 2px 6px -2px rgba(0, 0, 0, 0.06);
}

/* ── Inner container ── */
.sms-nav-inner {
  max-width: 80rem;
  margin: 0 auto;
  padding: 0 1.5rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 68px;
}

/* ── Logo ── */
.sms-logo {
  display: flex;
  align-items: center;
  gap: 10px;
  text-decoration: none;
  flex-shrink: 0;
}

.sms-logo-icon {
  width: 38px;
  height: 38px;
  background: linear-gradient(135deg, #72e315, #06d729);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  color: #fff;
  box-shadow: 0 4px 12px rgba(125, 245, 74, 0.25);
  transition: box-shadow 0.3s ease;
}

.sms-logo:hover .sms-logo-icon {
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.35);
}

.sms-logo-text {
  display: flex;
  flex-direction: column;
  line-height: 1.2;
}

.sms-logo-title {
  font-size: 15px;
  font-weight: 700;
  color: var(--sms-navy);
  letter-spacing: -0.02em;
}

.sms-logo-sub {
  font-size: 15px;
  font-weight: 600;
  color: var(--sms-primary);
  letter-spacing: -0.02em;
  margin-top: -2px;
}

/* ── Desktop nav ── */
.sms-desktop-nav {
  display: none;
  align-items: center;
  gap: 2px;
}

@media (min-width: 1024px) {
  .sms-desktop-nav {
    display: flex;
  }
}

.sms-nav-link {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  padding: 7px 14px;
  font-size: 13.5px;
  font-weight: 500;
  color: var(--sms-gray-500);
  background: none;
  border: none;
  border-radius: var(--sms-radius-sm);
  cursor: pointer;
  text-decoration: none;
  position: relative;
  transition: all 0.2s ease;
}

.sms-nav-link::after {
  content: '';
  position: absolute;
  bottom: -2px;
  left: 50%;
  width: 0;
  height: 2px;
  background: var(--sms-primary);
  border-radius: 1px;
  transform: translateX(-50%);
  transition: width 0.25s ease;
}

.sms-nav-link:hover,
.sms-nav-link.active {
  color: var(--sms-primary);
  background: rgba(37, 99, 235, 0.05);
}

.sms-nav-link:hover::after,
.sms-nav-link.active::after {
  width: 70%;
}

.sms-chevron {
  transition: transform 0.22s ease;
  opacity: 0.5;
}

/* ── Dropdowns ── */
.sms-dropdown {
  position: relative;
}

.sms-dropdown-menu {
  position: absolute;
  top: calc(100% + 8px);
  left: 0;
  width: 240px;
  background: #fff;
  border: 1px solid rgba(226, 232, 240, 0.8);
  border-radius: var(--sms-radius);
  padding: 6px;
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px) scale(0.97);
  transition: all 0.22s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: 0 20px 40px -12px rgba(0, 0, 0, 0.12);
}

.sms-dropdown:hover .sms-dropdown-menu {
  opacity: 1;
  visibility: visible;
  transform: translateY(0) scale(1);
}

.sms-dropdown:hover .sms-chevron {
  transform: rotate(180deg);
}

.sms-dropdown-item {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 9px 14px;
  font-size: 13px;
  color: var(--sms-gray-600);
  text-decoration: none;
  border-radius: var(--sms-radius-sm);
  transition: all 0.15s ease;
}

.sms-dropdown-item:hover {
  background: rgba(37, 99, 235, 0.06);
  color: var(--sms-primary);
}

.sms-dropdown-item--primary {
  color: var(--sms-primary);
  font-weight: 600;
}

.sms-dd-icon {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}

.sms-dd-icon--blue   { background: #eff6ff; color: #2563eb; }
.sms-dd-icon--green  { background: #f0fdf4; color: #16a34a; }
.sms-dd-icon--violet { background: #f5f3ff; color: #7c3aed; }
.sms-dd-icon--amber  { background: #fffbeb; color: #d97706; }
.sms-dd-icon--rose   { background: #fff1f2; color: #e11d48; }

.sms-dropdown-divider {
  height: 1px;
  background: var(--sms-gray-100);
  margin: 5px 12px;
}

/* ── Right side ── */
.sms-right {
  display: flex;
  align-items: center;
  gap: 6px;
}

/* ── Icon buttons ── */
.sms-icon-btn {
  display: none;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--sms-radius-sm);
  background: none;
  border: none;
  color: var(--sms-gray-400);
  cursor: pointer;
  transition: all 0.2s ease;
}

@media (min-width: 640px) {
  .sms-icon-btn {
    display: flex;
  }
}

.sms-icon-btn:hover {
  color: var(--sms-primary);
  background: rgba(37, 99, 235, 0.06);
}

/* ── Notification badge dot ── */
.sms-notif-wrap {
  position: relative;
}

.sms-notif-dot {
  position: absolute;
  top: 6px;
  right: 6px;
  width: 8px;
  height: 8px;
  background: #ef4444;
  border-radius: 50%;
  border: 2px solid #fff;
  pointer-events: none;
}

/* ── Notification dropdown ── */
.sms-notif-dd {
  position: absolute;
  top: calc(100% + 8px);
  right: 0;
  width: 320px;
  background: #fff;
  border: 1px solid rgba(226, 232, 240, 0.8);
  border-radius: var(--sms-radius);
  z-index: 1000;
  opacity: 0;
  visibility: hidden;
  transform: translateY(8px);
  transition: all 0.22s ease;
  box-shadow: 0 20px 40px -12px rgba(0, 0, 0, 0.12);
}

.sms-notif-dd.active {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.sms-notif-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 14px 16px;
  border-bottom: 1px solid var(--sms-gray-100);
}

.sms-notif-title {
  font-size: 14px;
  font-weight: 600;
  color: var(--sms-navy);
}

.sms-notif-badge {
  font-size: 11px;
  font-weight: 600;
  color: var(--sms-primary);
  background: var(--sms-primary-light);
  padding: 2px 8px;
  border-radius: 20px;
}

.sms-notif-list {
  max-height: 250px;
  overflow-y: auto;
}

.sms-notif-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 12px 16px;
  text-decoration: none;
  transition: background 0.15s ease;
}

.sms-notif-item:hover {
  background: var(--sms-gray-50);
}

.sms-notif-item--unread {
  background: rgba(37, 99, 235, 0.03);
}

.sms-notif-item div {
  flex: 1;
  min-width: 0;
}

.sms-notif-item p {
  font-size: 13px;
  color: var(--sms-gray-700);
  margin: 0;
  line-height: 1.4;
}

.sms-notif-item span {
  font-size: 11px;
  color: var(--sms-gray-400);
  margin-top: 2px;
  display: block;
}

.sms-notif-icon {
  width: 32px;
  height: 32px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
  margin-top: 2px;
}

.sms-notif-icon--blue   { background: #dbeafe; color: #2563eb; }
.sms-notif-icon--green  { background: #dcfce7; color: #16a34a; }
.sms-notif-icon--amber  { background: #fef3c7; color: #d97706; }

.sms-notif-footer {
  padding: 10px 16px;
  border-top: 1px solid var(--sms-gray-100);
}

.sms-notif-footer a {
  font-size: 12px;
  font-weight: 600;
  color: var(--sms-primary);
  text-decoration: none;
}

.sms-notif-footer a:hover {
  color: var(--sms-primary-dark);
}

/* ── Divider ── */
.sms-divider {
  width: 1px;
  height: 24px;
  background: var(--sms-gray-200);
  margin: 0 6px;
  display: none;
}

@media (min-width: 1024px) {
  .sms-divider {
    display: block;
  }
}

/* ── Buttons ── */
.sms-btn {
  display: none;
  align-items: center;
  gap: 6px;
  padding: 7px 16px;
  font-size: 13px;
  font-weight: 600;
  border-radius: var(--sms-radius-sm);
  text-decoration: none;
  cursor: pointer;
  border: none;
  transition: all 0.2s ease;
  white-space: nowrap;
}

@media (min-width: 640px) {
  .sms-btn {
    display: inline-flex;
  }
}

.sms-btn--secondary {
  color: var(--sms-gray-600);
  background: #fff;
  border: 1px solid var(--sms-gray-200);
}

.sms-btn--secondary:hover {
  background: var(--sms-gray-50);
  border-color: var(--sms-gray-300);
  color: var(--sms-navy);
}

.sms-btn--primary {
  color: #fff;
  background: linear-gradient(135deg, #2563eb, #1d4ed8);
  box-shadow: 0 4px 12px rgba(37, 99, 235, 0.2);
}

.sms-btn--primary:hover {
  background: linear-gradient(135deg, #1d4ed8, #1e3a8a);
  box-shadow: 0 6px 16px rgba(37, 99, 235, 0.3);
  transform: translateY(-1px);
}

/* ── Hamburger ── */
.sms-hamburger {
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  width: 36px;
  height: 36px;
  border-radius: var(--sms-radius-sm);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0;
  gap: 5px;
}

@media (min-width: 1024px) {
  .sms-hamburger {
    display: none;
  }
}

.sms-hamburger span {
  display: block;
  width: 18px;
  height: 2px;
  background: var(--sms-gray-600);
  border-radius: 2px;
  transition: all 0.3s ease;
}

.sms-hamburger.active span:nth-child(1) {
  transform: rotate(45deg) translate(5px, 5px);
}

.sms-hamburger.active span:nth-child(2) {
  opacity: 0;
}

.sms-hamburger.active span:nth-child(3) {
  transform: rotate(-45deg) translate(7px, -6px);
}

/* ── Search panel ── */
.sms-search-panel {
  max-height: 0;
  overflow: hidden;
  opacity: 0;
  transition: max-height 0.3s ease, opacity 0.25s ease;
  border-top: 1px solid transparent;
}

.sms-search-panel.active {
  max-height: 80px;
  opacity: 1;
  border-top-color: rgba(226, 232, 240, 0.6);
  background: rgba(255, 255, 255, 0.95);
  backdrop-filter: blur(20px);
}

.sms-search-inner {
  max-width: 80rem;
  margin: 0 auto;
  padding: 12px 1.5rem;
}

.sms-search-box {
  position: relative;
  max-width: 36rem;
  margin: 0 auto;
}

.sms-search-box svg {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--sms-gray-400);
}

.sms-search-box input {
  width: 100%;
  padding: 10px 4rem 10px 40px;
  font-size: 13px;
  background: var(--sms-gray-50);
  border: 1px solid var(--sms-gray-200);
  border-radius: var(--sms-radius);
  outline: none;
  color: var(--sms-navy);
  transition: all 0.2s ease;
  font-family: var(--sms-font);
}

.sms-search-box input:focus {
  border-color: var(--sms-primary);
  box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.sms-search-box kbd {
  position: absolute;
  right: 12px;
  top: 50%;
  transform: translateY(-50%);
  padding: 2px 8px;
  font-size: 11px;
  color: var(--sms-gray-400);
  background: var(--sms-gray-100);
  border: 1px solid var(--sms-gray-200);
  border-radius: 6px;
  font-family: var(--sms-font);
  font-weight: 500;
}

/* ═══════════════════════════════════════════════════════════════════════
   MOBILE MENU
   ═══════════════════════════════════════════════════════════════════════ */

.sms-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0, 0, 0, 0.4);
  backdrop-filter: blur(4px);
  z-index: 9998;
  opacity: 0;
  visibility: hidden;
  transition: all 0.3s ease;
}

.sms-overlay.active {
  opacity: 1;
  visibility: visible;
}

.sms-mobile-menu {
  position: fixed;
  top: 0;
  right: 0;
  width: 320px;
  max-width: 88vw;
  height: 100%;
  background: #fff;
  z-index: 10000;
  overflow-y: auto;
  transform: translateX(100%);
  transition: transform 0.32s cubic-bezier(0.4, 0, 0.2, 1);
  box-shadow: -8px 0 30px rgba(0, 0, 0, 0.12);
}

.sms-mobile-menu.open {
  transform: translateX(0);
}

.sms-mobile-inner {
  padding: 24px;
}

.sms-mobile-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 32px;
}

.sms-close-btn {
  width: 32px;
  height: 32px;
  border-radius: 8px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: none;
  border: none;
  color: var(--sms-gray-400);
  cursor: pointer;
  transition: all 0.2s ease;
}

.sms-close-btn:hover {
  color: var(--sms-gray-600);
  background: var(--sms-gray-100);
}

/* ── Mobile nav links ── */
.sms-mobile-nav {
  display: flex;
  flex-direction: column;
  gap: 2px;
}

.sms-mobile-link {
  display: flex;
  align-items: center;
  gap: 12px;
  padding: 10px 12px;
  font-size: 13px;
  font-weight: 500;
  color: var(--sms-gray-600);
  text-decoration: none;
  border-radius: var(--sms-radius-sm);
  transition: all 0.15s ease;
}

.sms-mobile-link:hover,
.sms-mobile-link.active {
  background: var(--sms-primary-light);
  color: var(--sms-primary);
}

.sms-mobile-link.active {
  font-weight: 600;
}

/* ── Mobile accordion ── */
.sms-mobile-acc {
  display: flex;
  flex-direction: column;
}

.sms-mobile-acc-btn {
  width: 100%;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 10px 12px;
  font-size: 13px;
  font-weight: 500;
  color: var(--sms-gray-600);
  background: none;
  border: none;
  border-radius: var(--sms-radius-sm);
  cursor: pointer;
  transition: all 0.15s ease;
  font-family: var(--sms-font);
}

.sms-mobile-acc-btn span {
  display: flex;
  align-items: center;
  gap: 12px;
}

.sms-mobile-acc-btn:hover {
  background: var(--sms-gray-50);
}

.sms-acc-chevron {
  transition: transform 0.22s ease;
  color: var(--sms-gray-400);
}

.sms-mobile-acc-sub {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.32s ease;
  padding-left: 42px;
}

.sms-mobile-acc-sub.open {
  max-height: 400px;
}

.sms-mobile-acc-sub a {
  display: block;
  padding: 8px 12px;
  font-size: 13px;
  color: var(--sms-gray-500);
  text-decoration: none;
  border-radius: 8px;
  transition: all 0.15s ease;
}

.sms-mobile-acc-sub a:hover {
  color: var(--sms-primary);
  background: var(--sms-primary-light);
}

/* ── Mobile CTA ── */
.sms-mobile-cta {
  margin-top: 32px;
  padding-top: 24px;
  border-top: 1px solid var(--sms-gray-100);
  display: flex;
  flex-direction: column;
  gap: 10px;
}