/* ===== Top Nav ===== */
:root {
  --nav-bg: #fff;
  --nav-text: #1f2937;       /* slate-800 */
  --nav-muted: #6b7280;      /* slate-500 */
  --nav-border: #e5e7eb;     /* slate-200 */
  --nav-hover: #f3f4f6;      /* slate-100 */
  --nav-ring: #2563eb;       /* blue-600 */
  --nav-alert-bg: #fef2f2;
  --nav-alert-hover: #fee2e2;
  --nav-alert-border: #fecaca;
  --nav-alert-text: #b91c1c;
  --nav-alert-badge-bg: #dc2626;
  --app-width: 100vw;
  /* Increased safe-area buffer for mobile devices */
  --mobile-bottom-buffer: env(safe-area-inset-bottom, 64px);
}


html, body {
  overscroll-behavior-x: none;
  overscroll-behavior-y: none;
  /* allow vertical scrolling while intercepting horizontal swipes */
  touch-action: pan-y;
  min-height: 100%;
  overflow-x: hidden;
  margin: 0;
  padding: 0;
  width: 100%;
}

html {
  height: auto;
}

body {
  min-height: 100vh;
}


body {
  font-family: -apple-system, BlinkMacSystemFont, 'SF Pro Text', 'Segoe UI', Roboto, 'Helvetica Neue', Helvetica, Arial, sans-serif;
  visibility: hidden;
  margin: 0;
}

html.modal-open,
body.modal-open {
  overflow: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
  text-align: center;
}

body.auth-ready {
  visibility: visible;
}

main,
.section,
.page {
  box-sizing: border-box;
}

@media (min-width: 700px) {
  nav.topnav,
  .chart-container,
  .panel-container {
    padding-left: 1rem;
    padding-right: 1rem;
    box-sizing: border-box;
  }

  main,
  .section,
  .page {
    padding-left: 1rem;
    padding-right: 1rem;
    box-sizing: border-box;
  }
}

nav.topnav {
  position: relative;
  z-index: 20;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
  padding: .5rem 1rem;
  padding-top: calc(.5rem + env(safe-area-inset-top, 0px));
  box-sizing: border-box;
  width: 100%;
  background: var(--nav-bg);
  color: var(--nav-text);
  border-bottom: 1px solid var(--nav-border);
}

/* Left links */
nav.topnav .nav-left { display: flex; align-items: center; gap: .75rem; }

nav.topnav a,
nav.topnav a:link,
nav.topnav a:visited,
nav.topnav a:hover,
nav.topnav a:active {
  color: var(--nav-text);
  text-decoration: none;
  padding: .5rem .75rem;
  border-radius: .5rem;
  line-height: 1;
  transition: background-color .15s ease;
}

nav.topnav a.desktop-only { display: none; }
@media (min-width: 700px) {
  nav.topnav a.desktop-only { display: inline-block; }
}

nav.topnav a:hover { background: var(--nav-hover); }
nav.topnav a.active {
  font-weight: 700;
  color: var(--nav-ring);
}

/* Right side (profile) */
.nav-right {
  margin-left: auto;
  position: relative;
  display: flex;
  align-items: center;
  justify-content: flex-end;
  flex-wrap: wrap;
  gap: .75rem;
}

.profile-btn {
  display: inline-flex;
  align-items: center;
  gap: .5rem;
  padding: .25rem .5rem;
  background: transparent;
  border: 1px solid transparent;
  border-radius: .5rem;
  color: inherit;
  cursor: pointer;
  line-height: 1;
  transition: background-color .15s ease, border-color .15s ease;
}

.profile-btn:hover { background: var(--nav-hover); }
.profile-btn:focus-visible {
  outline: 0;
  border-color: var(--nav-ring);
  box-shadow: 0 0 0 3px color-mix(in oklab, var(--nav-ring) 40%, transparent);
}

/* Avatar + fallback */
.avatar,
.avatar.avatar-fallback {
  width: 32px;
  height: 32px;
  border-radius: 9999px;
  object-fit: cover;
  background: var(--nav-border);
}
.avatar-fallback {
  display: none; /* JS shows when no photo */
  font-size: .9rem;
  font-weight: 700;
  color: var(--nav-text);
  align-items: center;
  justify-content: center;
}

.student-name {
  max-width: 18ch;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
  font-size: .95rem;
}

/* Chevron */
.chev { opacity: .65; transition: transform .15s ease; }
.profile-btn[aria-expanded="true"] .chev { transform: rotate(180deg); }

/* Dropdown */
.menu {
  position: absolute;
  right: 0;
  top: calc(100% + .5rem);
  min-width: min(14rem, calc(var(--app-width) - .75rem), calc(100vw - .75rem));
  max-width: min(20rem, calc(var(--app-width) - .75rem), calc(100vw - .75rem));
  background: var(--nav-bg);
  border: 1px solid var(--nav-border);
  border-radius: .5rem;
  box-shadow: 0 10px 30px rgba(0,0,0,.12);
  padding: .5rem;
  box-sizing: border-box;
  display: flex;
  flex-direction: column;
  align-items: stretch;
  gap: .25rem;
}

.menu::before {
  content: "";
  position: absolute;
  right: 1.25rem;
  top: -6px;
  width: 10px;
  height: 10px;
  background: var(--nav-bg);
  border-left: 1px solid var(--nav-border);
  border-top: 1px solid var(--nav-border);
  transform: rotate(45deg);
}
.menu-item {
  display: block;
  width: 100%;
  text-align: left;
  background: transparent;
  border: 0;
  padding: .55rem .75rem;
  border-radius: .375rem;
  cursor: pointer;
  color: var(--nav-text);
  font: inherit;
  box-sizing: border-box;
}
.menu-item:hover { background: var(--nav-hover); }

.menu-item--pending {
  display: flex;
  align-items: center;
  gap: .75rem;
  font-weight: 600;
}

.menu-item--pending .menu-item__label {
  flex: 1;
  min-width: 0;
}

.menu-item--pending .menu-item__badge {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  padding: 0 .5rem;
  min-width: 1.75rem;
  border-radius: 9999px;
  font-size: .75rem;
  font-weight: 700;
  background: var(--nav-alert-badge-bg);
  color: #fff;
}

.menu-item--alert {
  border: 1px solid var(--nav-alert-border);
  background: var(--nav-alert-bg);
  color: var(--nav-alert-text);
}

.menu-item--alert:hover {
  background: var(--nav-alert-hover);
}

.menu-items,
.menu-footer {
  display: flex;
  flex-direction: column;
  gap: .25rem;
}

.menu-footer {
  margin-top: .25rem;
  padding-top: .25rem;
  border-top: 1px solid var(--nav-border);
}

.menu-footer:empty {
  display: none;
}

.hidden { display: none !important; }

/* Small screens: hide name and chevron for space */
@media (max-width: 600px) {
  .student-name,
  .chev {
    display: none;
  }

  .nav-right {
    padding-right: 1.5rem;
    padding-right: calc(.75rem + env(safe-area-inset-right, 0px));
  }
}

/* Mobile layout */
@media (max-width: 600px) {
  body {
    width: 100%;
    margin: 0;
    padding-bottom: calc(var(--mobile-bottom-buffer) + 2rem);
    box-sizing: border-box;
  }

  main,
  .section,
  .page {
    padding-left: 1rem;
    padding-right: 1rem;
  }

  main {
    text-align: center;
  }

  .card-container,
  .nav-card {
    width: 100%;
    box-sizing: border-box;
  }
}

.app-toast-container {
  position: fixed;
  top: calc(1rem + env(safe-area-inset-top, 0px));
  right: 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
  pointer-events: none;
  z-index: 60;
}

.app-toast {
  background: rgba(17, 24, 39, 0.95);
  color: #f9fafb;
  padding: 0.75rem 1rem;
  border-radius: 0.75rem;
  box-shadow: 0 20px 40px rgba(15, 23, 42, 0.25);
  transform: translateY(12px);
  opacity: 0;
  transition: opacity 0.2s ease, transform 0.2s ease;
  max-width: min(360px, calc(100vw - 2rem));
  line-height: 1.4;
  border-left: 4px solid #ff908b;
  pointer-events: auto;
  display: flex;
  align-items: flex-start;
  gap: 0.75rem;
}

.app-toast.show {
  opacity: 1;
  transform: translateY(0);
}

.app-toast-message {
  flex: 1;
  word-break: break-word;
}

.app-toast-close {
  border: none;
  background: transparent;
  color: inherit;
  font-size: 1.25rem;
  line-height: 1;
  cursor: pointer;
  padding: 0;
  margin: -0.15rem -0.25rem 0 0;
  opacity: 0.8;
  transition: opacity 0.2s ease, transform 0.2s ease;
}

.app-toast-close:hover,
.app-toast-close:focus {
  opacity: 1;
  transform: scale(1.05);
}

.app-toast-close:focus {
  outline: 2px solid rgba(255, 255, 255, 0.6);
  outline-offset: 2px;
}