/* ============================================================
   SPEECHGRADEBOOK — DESIGN TOKENS & COMPONENT SPEC
   Gradebook Technologies LLC
   Last updated: June 2026
   ============================================================ */

/* ------------------------------------------------------------
   1. COLOR TOKENS
   ------------------------------------------------------------ */

:root {
  --color-primary:        #1e3a5f;
  --color-primary-dark:   #142940;
  --color-primary-light:  #2d4a6f;

  --color-accent:         #e8a838;
  --color-accent-dark:    #c98f20;
  --color-accent-light:   #f2c46d;

  --color-secondary:      #4a7c8f;
  --color-secondary-dark: #3a6070;

  --color-gray-100:       #f5f6f8;
  --color-gray-200:       #eceef2;
  --color-gray-300:       #d1d5db;
  --color-gray-400:       #9ca3af;
  --color-gray-500:       #6b7280;
  --color-gray-600:       #4b5563;
  --color-gray-900:       #111827;

  --color-success:        #2a9d6f;
  --color-warning:        #e8a838;
  --color-error:          #dc2626;
  --color-info:           #4a7c8f;

  --color-bg-page:        #f5f6f8;
  --color-bg-card:        #ffffff;
  --color-bg-nav:         #142940;
  --color-bg-nav-hover:   #1e3a5f;
}

/* ------------------------------------------------------------
   2. TYPOGRAPHY TOKENS
   ------------------------------------------------------------ */

:root {
  --font-primary:   'Inter', -apple-system, BlinkMacSystemFont,
                    'Segoe UI', Roboto, sans-serif;
  --font-mono:      'JetBrains Mono', 'Fira Code', monospace;

  --text-xs:        0.75rem;
  --text-sm:        0.875rem;
  --text-base:      1rem;
  --text-lg:        1.125rem;
  --text-xl:        1.25rem;
  --text-2xl:       1.5rem;
  --text-3xl:       1.875rem;

  --weight-light:   300;
  --weight-regular: 400;
  --weight-medium:  500;
  --weight-semibold:600;
  --weight-bold:    700;

  --leading-tight:  1.25;
  --leading-normal: 1.5;
  --leading-relaxed:1.75;

  --tracking-tight:   -0.01em;
  --tracking-normal:   0em;
  --tracking-wide:     0.05em;
  --tracking-wider:    0.1em;
}

body {
  font-family: var(--font-primary);
  font-size: var(--text-base);
  font-weight: var(--weight-regular);
  line-height: var(--leading-normal);
  color: var(--color-gray-600);
  background-color: var(--color-bg-page);
}

h1, h2, h3, h4, h5, h6 {
  font-weight: var(--weight-semibold);
  line-height: var(--leading-tight);
  color: var(--color-primary);
}

h1 { font-size: var(--text-3xl); }
h2 { font-size: var(--text-2xl); }
h3 { font-size: var(--text-xl); }
h4 { font-size: var(--text-lg); }

.label-caps {
  font-size: var(--text-xs);
  font-weight: var(--weight-light);
  letter-spacing: var(--tracking-wider);
  text-transform: uppercase;
  color: var(--color-gray-500);
}

/* ------------------------------------------------------------
   3. SPACING & LAYOUT TOKENS
   ------------------------------------------------------------ */

:root {
  --space-1:   0.25rem;
  --space-2:   0.5rem;
  --space-3:   0.75rem;
  --space-4:   1rem;
  --space-5:   1.25rem;
  --space-6:   1.5rem;
  --space-8:   2rem;
  --space-10:  2.5rem;
  --space-12:  3rem;
  --space-16:  4rem;

  --container-max:  1280px;
  --nav-height:     56px;
  --sidebar-width:  240px;
}

/* ------------------------------------------------------------
   4. BORDER & RADIUS TOKENS
   ------------------------------------------------------------ */

:root {
  --radius-sm:    4px;
  --radius-md:    8px;
  --radius-lg:    12px;
  --radius-xl:    16px;
  --radius-full:  9999px;

  --border-width:       1px;
  --border-color:       var(--color-gray-200);
  --border-color-focus: var(--color-primary);
  --border-color-error: var(--color-error);
}

/* ------------------------------------------------------------
   5. SHADOW TOKENS
   ------------------------------------------------------------ */

:root {
  --shadow-xs:  0 1px 2px rgba(0,0,0,0.05);
  --shadow-sm:  0 1px 4px rgba(0,0,0,0.08);
  --shadow-md:  0 4px 12px rgba(0,0,0,0.08);
  --shadow-lg:  0 8px 24px rgba(0,0,0,0.10);
  --shadow-xl:  0 16px 40px rgba(0,0,0,0.12);
}

/* ------------------------------------------------------------
   6. BUTTON SYSTEM
   ------------------------------------------------------------ */

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-6);
  font-family: var(--font-primary);
  font-size: var(--text-sm);
  font-weight: var(--weight-semibold);
  line-height: 1;
  border-radius: var(--radius-full);
  border: 2px solid transparent;
  cursor: pointer;
  transition: background-color 150ms ease,
              border-color 150ms ease,
              box-shadow 150ms ease,
              transform 100ms ease;
  text-decoration: none;
  white-space: nowrap;
}

.btn:active { transform: translateY(1px); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; }

.btn-primary {
  background-color: var(--color-primary);
  color: #ffffff;
  border-color: var(--color-primary);
}
.btn-primary:hover {
  background-color: var(--color-primary-dark);
  border-color: var(--color-primary-dark);
  box-shadow: var(--shadow-md);
}

.btn-accent {
  background-color: var(--color-accent);
  color: var(--color-primary-dark);
  border-color: var(--color-accent);
}
.btn-accent:hover {
  background-color: var(--color-accent-dark);
  border-color: var(--color-accent-dark);
  box-shadow: var(--shadow-md);
}

.btn-outline {
  background-color: transparent;
  color: var(--color-primary);
  border-color: var(--color-primary);
}
.btn-outline:hover {
  background-color: var(--color-primary);
  color: #ffffff;
}

.btn-ghost {
  background-color: transparent;
  color: var(--color-gray-500);
  border-color: transparent;
}
.btn-ghost:hover {
  background-color: var(--color-gray-100);
  color: var(--color-gray-900);
}

.btn-icon {
  padding: var(--space-2);
  border-radius: var(--radius-full);
  background-color: transparent;
  border-color: transparent;
  color: var(--color-gray-500);
}
.btn-icon:hover {
  background-color: var(--color-gray-200);
  color: var(--color-primary);
}

.btn-sm {
  padding: var(--space-2) var(--space-4);
  font-size: var(--text-xs);
}
.btn-lg {
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
}

/* ------------------------------------------------------------
   7. TAB SYSTEM
   ------------------------------------------------------------ */

.tabs {
  display: flex;
  gap: 0;
  border-bottom: 2px solid var(--color-gray-200);
}

.tab {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-3) var(--space-4);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-gray-500);
  border-bottom: 2px solid transparent;
  margin-bottom: -2px;
  cursor: pointer;
  transition: color 150ms ease, border-color 150ms ease;
  text-decoration: none;
  background: none;
  border-top: none;
  border-left: none;
  border-right: none;
}

.tab:hover {
  color: var(--color-primary);
  border-bottom-color: var(--color-primary-light);
}

.tab.active {
  color: var(--color-primary);
  font-weight: var(--weight-semibold);
  border-bottom-color: var(--color-accent);
}

.tabs-secondary .tab {
  font-size: var(--text-sm);
  padding: var(--space-2) var(--space-3);
}

/* ------------------------------------------------------------
   8. CARD SYSTEM
   ------------------------------------------------------------ */

.card {
  background-color: var(--color-bg-card);
  border-radius: var(--radius-lg);
  border: 1px solid var(--color-gray-200);
  box-shadow: var(--shadow-sm);
  padding: var(--space-6);
}

.card-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-bottom: var(--space-4);
  margin-bottom: var(--space-4);
  border-bottom: 1px solid var(--color-gray-200);
}

.card-title {
  font-size: var(--text-lg);
  font-weight: var(--weight-semibold);
  color: var(--color-primary);
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.card-item {
  background-color: var(--color-bg-card);
  border-radius: var(--radius-md);
  border: 1px solid var(--color-gray-200);
  box-shadow: var(--shadow-xs);
  padding: var(--space-5);
  transition: box-shadow 150ms ease, border-color 150ms ease;
}

.card-item:hover {
  box-shadow: var(--shadow-md);
  border-color: var(--color-primary-light);
}

.card-item-title {
  font-size: var(--text-base);
  font-weight: var(--weight-semibold);
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}

.card-item-meta {
  font-size: var(--text-sm);
  color: var(--color-gray-500);
}

.card-item-stats {
  display: flex;
  gap: var(--space-6);
  margin-top: var(--space-4);
  padding-top: var(--space-4);
  border-top: 1px solid var(--color-gray-200);
}

.card-stat-value {
  font-size: var(--text-xl);
  font-weight: var(--weight-bold);
  color: var(--color-primary);
  line-height: 1;
}

.card-stat-label {
  font-size: var(--text-xs);
  color: var(--color-gray-500);
  margin-top: var(--space-1);
}

/* ------------------------------------------------------------
   9. TOP NAVIGATION
   ------------------------------------------------------------ */

.nav {
  height: var(--nav-height);
  background-color: var(--color-bg-nav);
  display: flex;
  align-items: center;
  padding: 0 var(--space-6);
  gap: var(--space-4);
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: var(--shadow-md);
}

.nav-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  margin-right: var(--space-4);
}

.nav-logo-text {
  font-size: var(--text-lg);
  font-weight: var(--weight-bold);
  color: #ffffff;
  letter-spacing: var(--tracking-tight);
}

.nav-link {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-3);
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: rgba(255,255,255,0.75);
  border-radius: var(--radius-md);
  text-decoration: none;
  transition: background-color 150ms ease, color 150ms ease;
  border-bottom: 2px solid transparent;
}

.nav-link:hover {
  background-color: var(--color-bg-nav-hover);
  color: #ffffff;
}

.nav-link.active {
  color: #ffffff;
  border-bottom-color: var(--color-accent);
  background-color: var(--color-bg-nav-hover);
}

.nav-actions {
  margin-left: auto;
  display: flex;
  align-items: center;
  gap: var(--space-2);
}

.nav-icon-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: var(--radius-full);
  color: rgba(255,255,255,0.75);
  background: transparent;
  border: none;
  cursor: pointer;
  transition: background-color 150ms ease, color 150ms ease;
}

.nav-icon-btn:hover {
  background-color: var(--color-bg-nav-hover);
  color: #ffffff;
}

/* ------------------------------------------------------------
   10. FORM INPUTS
   ------------------------------------------------------------ */

.input {
  width: 100%;
  padding: var(--space-3) var(--space-4);
  font-family: var(--font-primary);
  font-size: var(--text-sm);
  color: var(--color-gray-900);
  background-color: var(--color-bg-card);
  border: 1px solid var(--color-gray-300);
  border-radius: var(--radius-md);
  transition: border-color 150ms ease, box-shadow 150ms ease;
  outline: none;
}

.input::placeholder { color: var(--color-gray-400); }
.input:hover { border-color: var(--color-primary-light); }
.input:focus {
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(30, 58, 95, 0.12);
}

.input-error { border-color: var(--color-error); }
.input-error:focus { box-shadow: 0 0 0 3px rgba(220, 38, 38, 0.12); }

.input-search {
  max-width: 480px;
  padding-left: var(--space-10);
  border-radius: var(--radius-full);
  border-color: var(--color-gray-200);
  background-color: var(--color-gray-100);
}

.input-search:focus {
  background-color: var(--color-bg-card);
  border-color: var(--color-primary);
  max-width: 600px;
  transition: max-width 200ms ease;
}

.input-label {
  display: block;
  font-size: var(--text-sm);
  font-weight: var(--weight-medium);
  color: var(--color-gray-600);
  margin-bottom: var(--space-2);
}

/* ------------------------------------------------------------
   11. BADGE & TAG SYSTEM
   ------------------------------------------------------------ */

.badge {
  display: inline-flex;
  align-items: center;
  padding: var(--space-1) var(--space-2);
  font-size: var(--text-xs);
  font-weight: var(--weight-medium);
  border-radius: var(--radius-full);
  letter-spacing: var(--tracking-wide);
  text-transform: uppercase;
}

.badge-primary {
  background-color: rgba(30, 58, 95, 0.1);
  color: var(--color-primary);
}

.badge-accent {
  background-color: rgba(232, 168, 56, 0.15);
  color: #a06820;
}

.badge-success {
  background-color: rgba(42, 157, 111, 0.1);
  color: #1a6b46;
}

.badge-neutral {
  background-color: var(--color-gray-200);
  color: var(--color-gray-600);
}

/* ------------------------------------------------------------
   12. PAGE LAYOUT UTILITIES
   ------------------------------------------------------------ */

.page-container {
  max-width: var(--container-max);
  margin: 0 auto;
  padding: var(--space-6) var(--space-6);
}

.page-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-6);
}

.page-title {
  font-size: var(--text-2xl);
  font-weight: var(--weight-bold);
  color: var(--color-primary);
}

.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: var(--space-4);
}

.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
  gap: var(--space-4);
}

.divider {
  border: none;
  border-top: 1px solid var(--color-gray-200);
  margin: var(--space-4) 0;
}