/* ============================================================
   Learn With Lane — Student Portal
   style.css (Part 5)
   Implements Part 3 UI/UX Design Specifications against the
   actual markup produced in Part 4 (index.html).
   ============================================================ */

/* ------------------------------------------------------------
   1. Global Reset
   ------------------------------------------------------------ */
*,
*::before,
*::after {
  box-sizing: border-box;
}

html,
body,
h1,
h2,
h3,
p,
figure,
blockquote,
dl,
dd,
ul,
ol {
  margin: 0;
}

ul,
ol {
  padding: 0;
  list-style: none;
}

img {
  max-width: 100%;
  display: block;
}

/* The [hidden] attribute is the ONLY hiding mechanism used by index.html
   and js/portal.js. The browser's default [hidden] { display: none } rule
   lives in the user-agent stylesheet, which ANY author `display:`
   declaration overrides regardless of specificity — so without this rule,
   .modal, .loading-container, .purchase-cta and #login-view all stay
   visible when JS sets el.hidden = true. Declared here, early and with
   !important, so it wins against every later display: rule in this file.
   Do not remove. */
[hidden] {
  display: none !important;
}

button,
input {
  font: inherit;
  color: inherit;
}

a {
  color: inherit;
}

/* ------------------------------------------------------------
   2. Design Tokens (LWL brand — confirmed Part 3)
   ------------------------------------------------------------ */
:root {
  /* Brand colors */
  --color-primary: #007bbf;
  --color-primary-dark: #00659a; /* ~10% darker, hover state */
  --color-primary-tint: #e6f2f9; /* row hover tint */
  --color-secondary: #d8893f;
  --color-secondary-dark: #bd722e;
  --color-accent: #fbe9b2; /* credit card background */

  --color-success: #2e7d32;
  --color-success-bg: #d1fae5;
  --color-success-text: #065f46;

  --color-warning: #f59e0b;

  --color-danger: #d32f2f;
  --color-danger-bg: #fee2e2;
  --color-danger-text: #7f1d1d;

  --color-text-dark: #1f2937;
  --color-text-medium: #374151;
  --color-text-neutral: #4b4b4b;
  --color-text-light: #6b7280;

  --color-bg-white: #ffffff;
  --color-bg-light: #f7f5f0; /* warm off-white, complements gold accent */
  --color-border: #d1d5db;

  /* Typography */
  --font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto,
    Helvetica, Arial, sans-serif;
  --font-size-h1: 30px;
  --font-size-h2: 22px;
  --font-size-body: 16px;
  --font-size-small: 14px;
  --font-size-credit: 44px;
  --font-weight-bold: 600;
  --font-weight-regular: 400;
  --line-height-tight: 1.2;
  --line-height-normal: 1.5;

  /* Spacing */
  --spacing-xs: 4px;
  --spacing-sm: 8px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;

  /* Border & shadow */
  --border-radius: 6px;
  --border-radius-lg: 10px;
  --shadow-sm: 0 1px 2px rgba(0, 0, 0, 0.05);
  --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
  --transition-speed: 200ms;

  /* Touch target minimum (mobile accessibility) */
  --touch-target: 48px;
}

/* ------------------------------------------------------------
   3. Base Styles
   ------------------------------------------------------------ */
body {
  font-family: var(--font-family);
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-regular);
  line-height: var(--line-height-normal);
  color: var(--color-text-neutral);
  background: var(--color-bg-white);
  -webkit-font-smoothing: antialiased;
}

h1 {
  font-size: var(--font-size-h1);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text-dark);
}

h2 {
  font-size: var(--font-size-h2);
  font-weight: var(--font-weight-bold);
  line-height: var(--line-height-tight);
  color: var(--color-text-dark);
}

/* ------------------------------------------------------------
   4. Accessibility Utilities
   ------------------------------------------------------------ */
.visually-hidden {
  position: absolute;
  width: 1px;
  height: 1px;
  padding: 0;
  margin: -1px;
  overflow: hidden;
  clip: rect(0, 0, 0, 0);
  white-space: nowrap;
  border: 0;
}

.skip-link {
  position: absolute;
  top: -48px;
  left: var(--spacing-md);
  background: var(--color-primary);
  color: #fff;
  padding: var(--spacing-sm) var(--spacing-md);
  border-radius: var(--border-radius);
  z-index: 1000;
  transition: top var(--transition-speed);
}

.skip-link:focus {
  top: var(--spacing-md);
}

/* Visible focus ring on every interactive element */
a:focus-visible,
button:focus-visible,
input:focus-visible {
  outline: 2px solid var(--color-primary);
  outline-offset: 2px;
}

/* ------------------------------------------------------------
   5. Login View
   ------------------------------------------------------------ */
#login-view {
  min-height: 100vh;
  display: flex;
  flex-direction: column;
  background: var(--color-bg-light);
}

.login-header {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-sm);
  padding: var(--spacing-lg) var(--spacing-md);
  text-align: center;
}

.logo--login {
  max-height: 64px;
}

.portal-subtitle {
  font-size: var(--font-size-small);
  color: var(--color-text-light);
}

#login-view #main-content {
  flex: 1;
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--spacing-md);
}

.login-card {
  background: var(--color-bg-white);
  width: 100%;
  max-width: 400px;
  padding: var(--spacing-lg);
  border-radius: var(--border-radius);
  box-shadow: none;
}

.login-card h1 {
  margin-bottom: var(--spacing-md);
  text-align: center;
}

.login-intro {
  text-align: center;
  color: var(--color-text-light);
  font-size: var(--font-size-small);
  margin-bottom: var(--spacing-lg);
}

.form-field {
  margin-bottom: var(--spacing-lg);
}

.form-field label {
  display: block;
  font-weight: var(--font-weight-bold);
  margin-bottom: var(--spacing-sm);
  color: var(--color-text-dark);
}

input[type="email"],
input[type="password"] {
  width: 100%;
  min-height: var(--touch-target);
  padding: 12px;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  font-size: var(--font-size-body);
  background: var(--color-bg-white);
  transition: border-color var(--transition-speed),
    box-shadow var(--transition-speed);
}

input[type="email"]:focus,
input[type="password"]:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0, 123, 191, 0.15);
}

.field-error,
.form-error {
  color: var(--color-danger);
  font-size: var(--font-size-small);
  margin-top: var(--spacing-sm);
}

.form-error {
  background: var(--color-danger-bg);
  border: 1px solid #fecaca;
  border-radius: var(--border-radius);
  padding: var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

#login-submit-btn {
  width: 100%;
  min-height: var(--touch-target);
  padding: 12px var(--spacing-md);
  background: var(--color-primary);
  color: #fff;
  font-size: var(--font-size-body);
  font-weight: var(--font-weight-bold);
  border: none;
  border-radius: var(--border-radius);
  cursor: pointer;
  transition: background-color var(--transition-speed),
    opacity var(--transition-speed);
}

#login-submit-btn:hover {
  background: var(--color-primary-dark);
}

#login-submit-btn:disabled {
  opacity: 0.7;
  cursor: not-allowed;
}

/* JS swaps .btn-label text to "Signing in…" and toggles this class */
#login-submit-btn.is-loading .btn-label::after {
  content: "…";
}

.login-help {
  text-align: center;
  margin-top: var(--spacing-md);
  font-size: var(--font-size-small);
}

.login-help a {
  color: var(--color-primary);
  text-decoration: underline;
}

.login-help a:hover {
  color: var(--color-primary-dark);
}

/* ------------------------------------------------------------
   6. Shared Footer
   ------------------------------------------------------------ */
.site-footer {
  text-align: center;
  padding: var(--spacing-lg) var(--spacing-md);
  font-size: var(--font-size-small);
  color: var(--color-text-light);
}

.dashboard-footer {
  border-top: 1px solid var(--color-border);
  margin-top: var(--spacing-xl);
}

/* ------------------------------------------------------------
   7. Dashboard Header / Navigation
   ------------------------------------------------------------ */
.dashboard-header {
  background: var(--color-bg-white);
  border-bottom: 1px solid var(--color-border);
  padding: var(--spacing-md) var(--spacing-lg);
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-md);
}

.header-brand {
  display: flex;
  align-items: center;
  gap: var(--spacing-sm);
}

.logo--dashboard {
  max-height: 40px;
}

.wordmark {
  font-weight: var(--font-weight-bold);
  color: var(--color-text-dark);
  font-size: var(--font-size-body);
}

.nav-toggle {
  display: none;
  min-width: var(--touch-target);
  min-height: var(--touch-target);
  background: transparent;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  font-size: 20px;
  cursor: pointer;
}

.header-actions {
  display: flex;
  align-items: center;
  gap: var(--spacing-lg);
}

.student-name {
  font-weight: var(--font-weight-bold);
  color: var(--color-text-dark);
  font-size: var(--font-size-small);
}

#logout-btn {
  min-height: var(--touch-target);
  padding: var(--spacing-sm) var(--spacing-md);
  background: transparent;
  color: var(--color-primary);
  border: none;
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-small);
  cursor: pointer;
  text-decoration: none;
}

#logout-btn:hover {
  text-decoration: underline;
}

/* ------------------------------------------------------------
   8. Dashboard Main Content
   ------------------------------------------------------------ */
#dashboard-main-content {
  max-width: 1000px;
  margin: 0 auto;
  padding: var(--spacing-lg) var(--spacing-md);
}

/* Loading state */
.loading-container {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--spacing-md);
  padding: var(--spacing-xl) var(--spacing-md);
  text-align: center;
  color: var(--color-text-light);
}

.spinner {
  width: 32px;
  height: 32px;
  border: 3px solid var(--color-border);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 1s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Error state */
.error-container {
  background: var(--color-danger-bg);
  border: 1px solid #fecaca;
  border-radius: var(--border-radius);
  padding: var(--spacing-lg);
  text-align: center;
  color: var(--color-danger-text);
  margin-bottom: var(--spacing-lg);
}

.error-container p {
  margin-bottom: var(--spacing-md);
}

#dashboard-retry-btn {
  min-height: var(--touch-target);
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--color-danger);
  color: #fff;
  border: none;
  border-radius: var(--border-radius);
  font-weight: var(--font-weight-bold);
  cursor: pointer;
}

#dashboard-retry-btn:hover {
  background: #b71c1c;
}

/* ------------------------------------------------------------
   8b. Student Switcher (accounts with more than one student)
   Rendered by portal.js only when a guardian account has siblings;
   single-student families never see it.
   ------------------------------------------------------------ */
.student-switcher {
  display: flex;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--spacing-sm) var(--spacing-md);
  margin-bottom: var(--spacing-lg);
}

.student-switcher-label {
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-bold);
  color: var(--color-text-light);
}

.student-switcher-buttons {
  display: flex;
  flex-wrap: wrap;
  gap: var(--spacing-sm);
}

.student-tab {
  min-height: var(--touch-target);
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--color-bg-white);
  color: var(--color-primary);
  border: 1px solid var(--color-primary);
  border-radius: 999px;
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-bold);
  cursor: pointer;
  transition: background-color var(--transition-speed),
    color var(--transition-speed);
}

.student-tab:hover {
  background: var(--color-primary-tint);
}

/* Selected state is carried by aria-pressed for screen readers and by
   this class visually — never by color alone (Part 3 a11y requirement). */
.student-tab--active {
  background: var(--color-primary);
  color: #fff;
}

.student-tab--active::before {
  content: "\2713\00a0"; /* checkmark + nbsp */
}

/* ------------------------------------------------------------
   9. Credit Balance Card
   ------------------------------------------------------------ */
.credit-card {
  background: var(--color-accent);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-lg);
  margin-bottom: var(--spacing-xl);
}

.credit-card h1 {
  font-size: var(--font-size-h1);
  margin-bottom: var(--spacing-md);
}

.credit-balance {
  margin-bottom: var(--spacing-md);
}

.credit-label {
  font-size: var(--font-size-small);
  color: var(--color-text-medium);
  margin-bottom: var(--spacing-xs);
}

.credit-number {
  font-size: var(--font-size-credit);
  font-weight: var(--font-weight-bold);
  color: var(--color-primary);
  line-height: var(--line-height-tight);
}

/* Applied by portal.js when credits.remaining < 2 (Part 8 spec,
   section 6: "red for low"). Text label still says "credits
   remaining" either way — color is never the only signal. */
.credit-number--low {
  color: var(--color-danger);
}

.purchase-cta {
  display: inline-block;
  min-height: var(--touch-target);
  line-height: calc(var(--touch-target) - 24px);
  padding: var(--spacing-sm) var(--spacing-lg);
  background: var(--color-secondary);
  color: #fff;
  font-weight: var(--font-weight-bold);
  border-radius: var(--border-radius);
  text-decoration: none;
  transition: background-color var(--transition-speed);
}

.purchase-cta:hover {
  background: var(--color-secondary-dark);
}

/* ------------------------------------------------------------
   10. Lessons Sections & Tables
   ------------------------------------------------------------ */
.lessons-section {
  margin-bottom: var(--spacing-xl);
}

.lessons-section h2 {
  margin-bottom: var(--spacing-md);
  padding-bottom: var(--spacing-sm);
  border-bottom: 2px solid var(--color-primary);
}

.empty-state {
  text-align: center;
  padding: var(--spacing-lg);
  color: var(--color-text-light);
  background: var(--color-bg-light);
  border-radius: var(--border-radius);
}

.lessons-table {
  width: 100%;
  border-collapse: collapse;
  background: var(--color-bg-white);
}

.lessons-table thead {
  background: var(--color-bg-light);
  border-bottom: 1px solid var(--color-border);
}

.lessons-table th {
  padding: var(--spacing-sm) var(--spacing-md);
  text-align: left;
  font-weight: var(--font-weight-bold);
  font-size: var(--font-size-small);
  color: var(--color-text-dark);
}

.lessons-table td {
  padding: var(--spacing-sm) var(--spacing-md);
  border-bottom: 1px solid var(--color-border);
  font-size: var(--font-size-small);
}

.lessons-table tbody tr {
  transition: background-color var(--transition-speed);
}

.lessons-table tbody tr:nth-child(even) {
  background: var(--color-bg-light);
}

.lessons-table tbody tr:hover {
  background: var(--color-primary-tint);
}

.lessons-table tbody tr:last-child td {
  border-bottom: none;
}

/* Status badges — inserted by portal.js per row.
   Color is paired with a text label, never used alone (Part 3 a11y req). */
.status-badge {
  display: inline-block;
  padding: 2px 10px;
  border-radius: 999px;
  font-size: var(--font-size-small);
  font-weight: var(--font-weight-bold);
}

.status-completed {
  background: var(--color-success-bg);
  color: var(--color-success-text);
}

.status-upcoming {
  background: var(--color-primary);
  color: #fff;
}

.status-cancelled {
  background: var(--color-danger-bg);
  color: var(--color-danger-text);
}

/* ------------------------------------------------------------
   11. Session-Expired Modal
   ------------------------------------------------------------ */
.modal {
  position: fixed;
  inset: 0;
  background: rgba(31, 41, 55, 0.6);
  display: flex;
  justify-content: center;
  align-items: center;
  padding: var(--spacing-md);
  z-index: 2000;
}

.modal-content {
  background: var(--color-bg-white);
  border-radius: var(--border-radius-lg);
  padding: var(--spacing-xl);
  max-width: 400px;
  width: 100%;
  box-shadow: var(--shadow-md);
  text-align: center;
}

.modal-content h2 {
  margin-bottom: var(--spacing-md);
}

.modal-content p {
  margin-bottom: var(--spacing-lg);
  color: var(--color-text-medium);
}

#session-expired-ok-btn {
  min-height: var(--touch-target);
  padding: var(--spacing-sm) var(--spacing-xl);
  background: var(--color-primary);
  color: #fff;
  border: none;
  border-radius: var(--border-radius);
  font-weight: var(--font-weight-bold);
  cursor: pointer;
}

#session-expired-ok-btn:hover {
  background: var(--color-primary-dark);
}

/* ------------------------------------------------------------
   12. Responsive Breakpoints
   ------------------------------------------------------------ */

/* Mobile: 320–640px is the default (mobile-first) styling above.
   Below, tables collapse into stacked cards. */
@media (max-width: 640px) {
  .dashboard-header {
    padding: var(--spacing-md);
  }

  .header-actions {
    display: none;
    flex-direction: column;
    align-items: flex-start;
    gap: var(--spacing-sm);
    width: 100%;
    order: 3;
  }

  .header-actions.is-open {
    display: flex;
  }

  .nav-toggle {
    display: inline-flex;
    align-items: center;
    justify-content: center;
  }

  .lessons-table,
  .lessons-table thead,
  .lessons-table tbody,
  .lessons-table th,
  .lessons-table tr,
  .lessons-table td {
    display: block;
    width: 100%;
  }

  .lessons-table thead {
    position: absolute;
    width: 1px;
    height: 1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
  }

  .lessons-table tbody tr {
    border: 1px solid var(--color-border);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm) 0;
  }

  .lessons-table tbody tr:nth-child(even) {
    background: var(--color-bg-white);
  }

  .lessons-table td {
    display: flex;
    justify-content: space-between;
    align-items: center;
    text-align: right;
    border-bottom: none;
    padding: var(--spacing-xs) var(--spacing-md);
  }

  .lessons-table td::before {
    content: attr(data-label);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-dark);
    text-align: left;
  }
}

/* Tablet: 641–1024px */
@media (min-width: 641px) {
  .login-header {
    padding: var(--spacing-xl) var(--spacing-md);
  }

  .login-card {
    box-shadow: var(--shadow-md);
    padding: var(--spacing-xl);
  }

  #dashboard-main-content {
    padding: var(--spacing-xl) var(--spacing-lg);
  }

  .credit-card {
    padding: var(--spacing-xl);
  }
}

/* Desktop: 1025px+ */
@media (min-width: 1025px) {
  #dashboard-main-content {
    padding: var(--spacing-xl) 0;
  }
}

/* ------------------------------------------------------------
   13. Utility Classes
   ------------------------------------------------------------ */
/* NOTE: there is deliberately no `.hidden` class here. Nothing in
   index.html or portal.js uses one — they use the [hidden] attribute,
   handled in section 1. A `.hidden` class existed here previously and
   was dead code, which masked the fact that [hidden] was never styled. */

.text-center {
  text-align: center;
}

.mt-lg {
  margin-top: var(--spacing-lg);
}

.mb-lg {
  margin-bottom: var(--spacing-lg);
}