:root {
  --bg: #f5f7fb;
  --panel: #ffffff;
  --panel-soft: #f9fbff;
  --text: #172033;
  --muted: #667085;
  --border: #d9e2ef;
  --brand: #2656d9;
  --brand-dark: #1d43aa;
  --brand-soft: #eaf0ff;
  --success: #0f766e;
  --warning: #b45309;
  --danger: #b42318;
  --shadow: 0 18px 45px rgba(15, 23, 42, 0.08);
  --radius: 18px;
}

* {
  box-sizing: border-box;
}

html {
  min-height: 100%;
}

body {
  margin: 0;
  min-height: 100%;
  background:
    radial-gradient(circle at top left, rgba(38, 86, 217, 0.12), transparent 34rem),
    linear-gradient(180deg, #f8faff 0%, var(--bg) 100%);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  line-height: 1.5;
}

a {
  color: var(--brand);
  text-decoration: none;
  font-weight: 650;
}

a:hover {
  text-decoration: underline;
}

.page {
  width: min(1120px, calc(100% - 32px));
  margin: 0 auto;
  padding: 34px 0 56px;
}

.card {
  background: rgba(255, 255, 255, 0.95);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 30px;
  margin-bottom: 24px;
}

.card + .card {
  margin-top: 20px;
}

h1 {
  margin: 0 0 10px;
  font-size: clamp(2rem, 4vw, 3rem);
  line-height: 1.05;
  letter-spacing: -0.04em;
}

h2 {
  margin: 28px 0 12px;
  font-size: 1.35rem;
  letter-spacing: -0.02em;
}

h3 {
  margin: 20px 0 8px;
}

p {
  margin: 0 0 14px;
}

.meta {
  color: var(--muted);
  font-size: 0.95rem;
}

.nav-list {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(210px, 1fr));
  gap: 12px;
  padding: 0;
  margin: 16px 0 0;
  list-style: none;
}

.nav-list li a {
  display: block;
  padding: 14px 16px;
  background: var(--panel-soft);
  border: 1px solid var(--border);
  border-radius: 14px;
  color: var(--text);
}

.nav-list li a:hover {
  background: var(--brand-soft);
  border-color: rgba(38, 86, 217, 0.35);
  text-decoration: none;
}

.tool-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 16px;
  margin-top: 18px;
}

.tool-group {
  background: var(--panel-soft);
  border: 1px solid var(--border);
  border-radius: 18px;
  padding: 18px;
}

.tool-group h3 {
  margin-top: 0;
  margin-bottom: 6px;
  font-size: 1.05rem;
}

.tool-links {
  display: grid;
  gap: 9px;
  margin-top: 14px;
}

.tool-links a {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 10px;
  padding: 11px 13px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 12px;
  color: var(--text);
  font-weight: 750;
}

.tool-links a::after {
  content: "›";
  color: var(--brand);
  font-size: 1.25rem;
  line-height: 1;
}

.tool-links a:hover {
  background: var(--brand-soft);
  border-color: rgba(38, 86, 217, 0.35);
  text-decoration: none;
}

.actions {
  display: flex;
  flex-wrap: wrap;
  align-items: center;
  gap: 10px;
  margin: 18px 0;
}

.button,
button,
input[type="submit"] {
  appearance: none;
  border: 0;
  border-radius: 999px;
  background: var(--brand);
  color: #fff;
  cursor: pointer;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  min-height: 42px;
  padding: 10px 18px;
  font: inherit;
  font-weight: 750;
  box-shadow: 0 8px 20px rgba(38, 86, 217, 0.22);
}

.button:hover,
button:hover,
input[type="submit"]:hover {
  background: var(--brand-dark);
  color: #fff;
  text-decoration: none;
}

.button.secondary {
  background: #fff;
  color: var(--brand);
  border: 1px solid var(--border);
  box-shadow: none;
}

.button.secondary:hover {
  background: var(--brand-soft);
}

form {
  margin: 18px 0 0;
}

label {
  display: block;
  font-weight: 700;
  color: var(--text);
}

input,
select,
textarea {
  width: min(100%, 520px);
  margin-top: 6px;
  padding: 11px 13px;
  border: 1px solid var(--border);
  border-radius: 12px;
  background: #fff;
  color: var(--text);
  font: inherit;
}

select {
  width: auto;
  min-width: 140px;
}

input:focus,
select:focus,
textarea:focus {
  outline: 3px solid rgba(38, 86, 217, 0.18);
  border-color: rgba(38, 86, 217, 0.65);
}

table {
  width: 100%;
  border-collapse: collapse;
  margin-top: 18px;
  overflow: hidden;
  border-radius: 14px;
  background: #fff;
  box-shadow: inset 0 0 0 1px var(--border);
}

th,
td {
  padding: 13px 14px;
  border-bottom: 1px solid var(--border);
  text-align: left;
  vertical-align: middle;
}

th {
  background: var(--panel-soft);
  color: #344054;
  font-size: 0.85rem;
  letter-spacing: 0.02em;
  text-transform: uppercase;
}

tr:last-child td {
  border-bottom: 0;
}

tr:hover td {
  background: #fbfdff;
}

pre {
  max-width: 100%;
  overflow-x: auto;
  padding: 16px;
  background: #101828;
  color: #f8fafc;
  border-radius: 14px;
  font-size: 0.92rem;
}

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

.qr-code,
img[alt*="QR"],
img[src^="data:image/png"] {
  display: block;
  width: min(460px, 100%);
  margin: 22px auto;
  padding: 18px;
  background: #fff;
  border: 1px solid var(--border);
  border-radius: 22px;
  box-shadow: var(--shadow);
}

.status-pill {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 5px 10px;
  border-radius: 999px;
  background: var(--brand-soft);
  color: var(--brand-dark);
  font-weight: 750;
  font-size: 0.86rem;
}

.success,
.notice-success {
  color: var(--success);
  font-weight: 750;
}

.warning,
.notice-warning {
  color: var(--warning);
  font-weight: 750;
}

.danger,
.notice-danger {
  color: var(--danger);
  font-weight: 750;
}

@media (max-width: 720px) {
  .page {
    width: min(100% - 18px, 1120px);
    padding-top: 16px;
  }

  .card {
    padding: 20px;
    border-radius: 16px;
  }

  .tool-grid {
    grid-template-columns: 1fr;
  }

  table {
    display: block;
    overflow-x: auto;
    white-space: nowrap;
  }

  .actions {
    align-items: stretch;
  }

  .actions .button,
  .actions button {
    width: 100%;
  }
}

/* Mobile home-page hero fix */
.hero-card {
  overflow: hidden;
}

.hero-grid {
  min-width: 0;
}

.hero-grid > div {
  min-width: 0;
}

.hero-grid p:not(.status-pill) {
  max-width: 44rem;
}

@media (max-width: 720px) {
  .hero-grid {
    display: grid !important;
    grid-template-columns: 1fr !important;
    gap: 20px !important;
  }

  .hero-card h1 {
    font-size: 2.4rem;
  }

  .hero-card .status-pill {
    width: fit-content;
    max-width: 100%;
  }

  .hero-card .actions {
    display: grid;
    grid-template-columns: 1fr;
    gap: 12px;
  }

  .hero-card .actions .button,
  .hero-card .actions button {
    width: 100%;
  }
}
/* Mobile login/register polish */
@media (max-width: 700px) {
  body {
    font-size: 16px;
  }

  .auth-container,
  .login-container,
  .form-container,
  .card.auth-card,
  .card.login-card {
    width: 100%;
    max-width: 100%;
  }

  .auth-card,
  .login-card,
  form.card,
  .form-card {
    padding: 1.5rem;
    border-radius: 18px;
  }

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

  input,
  select,
  textarea,
  button,
  .button,
  .btn {
    font-size: 1rem;
  }

  input,
  select,
  textarea {
    min-height: 48px;
    padding: 0.8rem 0.9rem;
  }

  button,
  .button,
  .btn {
    min-height: 48px;
    padding: 0.8rem 1rem;
  }

  .auth-card h1,
  .login-card h1,
  form.card h1,
  .form-card h1 {
    font-size: 1.8rem;
    line-height: 1.15;
  }

  .auth-card h2,
  .login-card h2,
  form.card h2,
  .form-card h2 {
    font-size: 1.4rem;
  }

  .auth-card p,
  .login-card p,
  form.card p,
  .form-card p {
    font-size: 1rem;
  }
}
/* Stronger mobile treatment for login/register pages */
@media (max-width: 700px) {
  body {
    font-size: 18px;
  }

  .container,
  .page-container,
  main {
    width: 100%;
    max-width: 100%;
    padding: 1rem;
  }

  .card {
    width: 100%;
    max-width: 100%;
    padding: 1.5rem;
    border-radius: 18px;
  }

  form {
    width: 100%;
    max-width: 100%;
  }

  label {
    font-size: 1.05rem;
    font-weight: 700;
    margin-bottom: 0.35rem;
    display: block;
  }

  input,
  select,
  textarea {
    width: 100%;
    max-width: 100%;
    min-height: 52px;
    font-size: 1.1rem;
    padding: 0.85rem 1rem;
    border-radius: 12px;
    box-sizing: border-box;
  }

  button,
  .button,
  .btn,
  a.button,
  input[type="submit"] {
    min-height: 52px;
    font-size: 1.05rem;
    padding: 0.85rem 1.15rem;
    border-radius: 999px;
  }

  form button,
  form .button,
  form .btn,
  input[type="submit"] {
    width: 100%;
    margin-top: 0.75rem;
  }

  h1 {
    font-size: 2.1rem;
    line-height: 1.1;
  }

  h2 {
    font-size: 1.6rem;
    line-height: 1.15;
  }

  p,
  .card p,
  .muted {
    font-size: 1.05rem;
    line-height: 1.45;
  }

  .card a {
    font-size: 1.05rem;
  }
}

/* RollPilot auth screens: mobile-first login/register layout */
.auth-card {
  max-width: 620px;
  margin-left: auto;
  margin-right: auto;
}

.auth-card .status-pill {
  margin-bottom: 12px;
}

.auth-form {
  width: 100%;
  max-width: 100%;
}

.auth-form p {
  margin-bottom: 16px;
}

.auth-form input {
  width: 100%;
  max-width: 100%;
}

.auth-form button {
  min-width: 180px;
}

@media (max-width: 720px) {
  .page {
    width: 100%;
    padding: 12px;
  }

  .auth-card {
    max-width: none;
    width: 100%;
    margin: 0;
    padding: 24px;
    border-radius: 20px;
  }

  .auth-card h1 {
    font-size: 2.2rem;
    line-height: 1.05;
  }

  .auth-card .meta,
  .auth-card p,
  .auth-card a {
    font-size: 1.05rem;
  }

  .auth-form label {
    font-size: 1.08rem;
  }

  .auth-form input {
    min-height: 56px;
    font-size: 1.12rem;
    padding: 0.9rem 1rem;
  }

  .auth-form button {
    width: 100%;
    min-height: 56px;
    font-size: 1.1rem;
  }
}

/* Compact buttons for Today’s Classes dashboard */
.today-actions {
  margin: 0;
  gap: 7px;
  flex-wrap: nowrap;
}

.today-actions .button,
.today-actions button {
  min-height: 34px;
  padding: 6px 12px;
  font-size: 0.9rem;
  box-shadow: none;
  white-space: nowrap;
}

@media (max-width: 720px) {
  .today-actions {
    flex-wrap: wrap;
  }

  .today-actions .button,
  .today-actions button {
    width: auto;
  }
}

/* Navigation polish */
.app-header {
  position: sticky;
  top: 0;
  z-index: 20;
  background: rgba(255, 255, 255, 0.94);
  border-bottom: 1px solid var(--border);
  backdrop-filter: blur(10px);
}

.app-header-inner {
  max-width: 1120px;
  margin: 0 auto;
  padding: 10px 18px;
  display: flex;
  align-items: center;
  gap: 14px;
}

.app-brand {
  font-weight: 800;
  color: var(--text);
  text-decoration: none;
  letter-spacing: -0.02em;
  margin-right: auto;
}

.app-nav {
  display: flex;
  align-items: center;
  gap: 6px;
}

.app-nav a,
.app-logout button {
  border: 1px solid transparent;
  background: transparent;
  color: var(--muted);
  text-decoration: none;
  font: inherit;
  font-size: 0.92rem;
  font-weight: 700;
  padding: 8px 10px;
  border-radius: 999px;
  cursor: pointer;
}

.app-nav a:hover,
.app-logout button:hover {
  color: var(--primary);
  background: var(--primary-soft);
  border-color: var(--border);
}

.app-nav a.active {
  color: #fff;
  background: #1746b8;
  border-color: #1746b8;
  box-shadow: 0 6px 14px rgba(23, 70, 184, 0.18);
}

.app-logout {
  margin: 0;
}

.breadcrumbs {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: 7px;
  margin: 0 0 12px;
  color: var(--muted);
  font-size: 0.92rem;
}

.breadcrumbs a {
  color: var(--muted);
  text-decoration: none;
  font-weight: 700;
}

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

.breadcrumbs span[aria-current="page"] {
  color: var(--text);
  font-weight: 800;
}

.breadcrumb-separator {
  color: var(--border-strong, #b7c2d8);
}

.course-tabs {
  display: flex;
  gap: 8px;
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  margin: 0 0 16px;
  padding: 0 0 4px;
}

.course-tabs a {
  flex: 0 0 auto;
  text-decoration: none;
  color: var(--muted);
  font-weight: 800;
  font-size: 0.92rem;
  padding: 9px 13px;
  border: 1px solid var(--border);
  border-radius: 999px;
  background: #fff;
}

.course-tabs a:hover {
  color: var(--primary);
  background: var(--primary-soft);
}

.course-tabs a.active {
  color: #fff;
  background: #1746b8;
  border-color: #1746b8;
  box-shadow: 0 6px 14px rgba(23, 70, 184, 0.18);
}

@media (max-width: 720px) {
  .app-header-inner {
    align-items: flex-start;
    flex-wrap: wrap;
    gap: 8px;
    padding: 10px 14px;
  }

  .app-brand {
    width: 100%;
    margin-right: 0;
  }

  .app-nav {
    flex: 1 1 auto;
    gap: 4px;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    padding-bottom: 2px;
  }

  .app-nav a,
  .app-logout button {
    font-size: 0.86rem;
    padding: 7px 9px;
    white-space: nowrap;
  }

  .app-logout {
    flex: 0 0 auto;
  }

  .breadcrumbs {
    font-size: 0.86rem;
    gap: 5px;
  }

  .course-tabs {
    margin-left: -2px;
    margin-right: -2px;
  }

  .course-tabs a {
    font-size: 0.86rem;
    padding: 8px 11px;
  }
}