/* ============================================================
   Online German – Student Dashboard
   Stil prati Educavo temu sajta onlinegerman.rs
   Boje: #1a3c6e (primary), #6B7A89 (accent), #f5f7fa (bg)
   Font: nasleđuje temu (Educavo / system serif+sans)
   ============================================================ */

/* ─── Varijable ─────────────────────────────────────────── */
:root {
  --og-primary:       #1a3c6e;
  --og-primary-dark:  #122d54;
  --og-primary-light: #2a5298;
  --og-accent:        #6B7A89;
  --og-accent-hover:  #5a6873;
  --og-bg:            #f5f7fa;
  --og-card:          #ffffff;
  --og-border:        #e2e6ed;
  --og-text:          #1c2335;
  --og-muted:         #6b7280;
  --og-radius:        4px;
  --og-radius-lg:     6px;
  --og-shadow:        0 2px 12px rgba(26,60,110,.08);
  --og-shadow-hover:  0 6px 20px rgba(26,60,110,.14);
  --og-transition:    180ms ease;
}

/* ─── Base ───────────────────────────────────────────────── */
.og-dashboard * { box-sizing: border-box; }

.og-dashboard {
  font-family: inherit;
  color: var(--og-text);
  max-width: 940px;
  margin: 0 auto;
  padding: 0 16px 60px;
  background: transparent;
}

/* ─── Header ─────────────────────────────────────────────── */
.og-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 14px;
  padding: 32px 0 24px;
  border-bottom: 2px solid var(--og-primary);
  margin-bottom: 28px;
}

.og-header h1 {
  margin: 0 0 4px;
  font-size: 1.55rem;
  color: var(--og-primary);
  font-weight: 700;
  letter-spacing: -.01em;
}

.og-header__course {
  margin: 0;
  font-size: .92rem;
  color: var(--og-muted);
  font-weight: 500;
  text-transform: uppercase;
  letter-spacing: .06em;
}

.og-header__expiry {
  margin: 5px 0 0;
  font-size: .84rem;
  color: var(--og-muted);
}

.og-header__expiry--soon {
  color: var(--og-accent);
  font-weight: 600;
}

/* ─── Tabs ───────────────────────────────────────────────── */
.og-tabs {
  display: flex;
  gap: 0;
  margin-bottom: 28px;
  border-bottom: 2px solid var(--og-border);
  overflow-x: auto;
}

.og-tab {
  background: none;
  border: none;
  border-bottom: 3px solid transparent;
  margin-bottom: -2px;
  padding: 11px 22px;
  font-size: .9rem;
  font-weight: 600;
  color: var(--og-muted);
  cursor: pointer;
  letter-spacing: .03em;
  text-transform: uppercase;
  font-size: .78rem;
  white-space: nowrap;
  transition: color var(--og-transition), border-color var(--og-transition);
}

.og-tab:hover { color: var(--og-primary); }

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

/* ─── Panels ─────────────────────────────────────────────── */
.og-panel         { display: none; }
.og-panel--active { display: block; }

/* ─── Cards ──────────────────────────────────────────────── */
.og-card {
  background: var(--og-card);
  border: 1px solid var(--og-border);
  border-radius: var(--og-radius-lg);
  padding: 22px 26px;
  margin-bottom: 16px;
  box-shadow: var(--og-shadow);
}

.og-card--highlight {
  border-left: 4px solid var(--og-accent);
  border-radius: 0 var(--og-radius-lg) var(--og-radius-lg) 0;
}

.og-card__label {
  font-size: .7rem;
  font-weight: 700;
  letter-spacing: .1em;
  text-transform: uppercase;
  color: var(--og-accent);
  margin-bottom: 8px;
}

.og-card__title {
  margin: 0 0 8px;
  font-size: 1.2rem;
  color: var(--og-primary);
  font-weight: 700;
}

.og-card__meta {
  margin: 0;
  color: var(--og-muted);
  font-size: .88rem;
}

/* ─── Summary grid ───────────────────────────────────────── */
.og-summary-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
  gap: 12px;
  margin-top: 18px;
}

.og-summary-card {
  background: var(--og-card);
  border: 1px solid var(--og-border);
  border-top: 3px solid var(--og-primary);
  border-radius: var(--og-radius-lg);
  padding: 18px 16px;
  text-align: center;
  box-shadow: var(--og-shadow);
}

.og-summary-card--alert {
  border-top-color: var(--og-accent);
}

.og-summary-card__num {
  display: block;
  font-size: 2.1rem;
  font-weight: 800;
  color: var(--og-primary);
  line-height: 1;
  margin-bottom: 6px;
}

.og-summary-card--alert .og-summary-card__num { color: var(--og-accent); }

.og-summary-card__label {
  font-size: .75rem;
  color: var(--og-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .04em;
}

/* ─── Class cards ────────────────────────────────────────── */
.og-classes-list { display: flex; flex-direction: column; gap: 12px; }

.og-class-card {
  background: var(--og-card);
  border: 1px solid var(--og-border);
  border-radius: var(--og-radius-lg);
  padding: 18px 24px;
  box-shadow: var(--og-shadow);
  transition: box-shadow var(--og-transition), transform var(--og-transition);
}

.og-class-card:hover {
  box-shadow: var(--og-shadow-hover);
  transform: translateY(-1px);
}

.og-class-card__header {
  display: flex;
  align-items: center;
  gap: 10px;
  margin-bottom: 8px;
  flex-wrap: wrap;
}

.og-class-card__number {
  font-size: .72rem;
  font-weight: 700;
  background: var(--og-primary);
  color: #fff;
  padding: 3px 10px;
  border-radius: var(--og-radius);
  letter-spacing: .04em;
  text-transform: uppercase;
}

.og-class-card__date  { font-size: .83rem; color: var(--og-muted); }
.og-class-card__title { margin: 0 0 6px; font-size: 1rem; color: var(--og-primary); font-weight: 700; }
.og-class-card__desc  { margin: 0 0 14px; color: var(--og-muted); font-size: .88rem; line-height: 1.6; }

.og-class-card__actions { display: flex; gap: 10px; flex-wrap: wrap; align-items: flex-start; }

.og-materials {
  display: flex;
  align-items: center;
  gap: 6px;
  flex-wrap: wrap;
}

.og-materials__label {
  font-size: .78rem;
  color: var(--og-muted);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: .04em;
}

.og-material-link {
  font-size: .82rem;
  color: var(--og-primary);
  text-decoration: none;
  padding: 4px 10px;
  border: 1px solid var(--og-border);
  border-radius: var(--og-radius);
  background: var(--og-bg);
  transition: background var(--og-transition), border-color var(--og-transition);
}

.og-material-link:hover {
  background: #fff;
  border-color: var(--og-primary);
}

/* ─── Task cards ─────────────────────────────────────────── */
.og-task-card {
  background: var(--og-card);
  border: 1px solid var(--og-border);
  border-radius: var(--og-radius-lg);
  padding: 22px 26px;
  margin-bottom: 16px;
  box-shadow: var(--og-shadow);
}

.og-task-card--corrected,
.og-task-card--completed { border-left: 4px solid #2e7d32; border-radius: 0 var(--og-radius-lg) var(--og-radius-lg) 0; }

.og-task-card--submitted,
.og-task-card--reviewing  { border-left: 4px solid var(--og-primary); border-radius: 0 var(--og-radius-lg) var(--og-radius-lg) 0; }

.og-task-card__header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 10px;
}

.og-task-card__title { margin: 0; font-size: 1rem; color: var(--og-primary); font-weight: 700; }
.og-task-card__desc  { margin: 0 0 10px; font-size: .9rem; line-height: 1.65; }
.og-task-card__due   { margin: 0 0 14px; font-size: .84rem; color: var(--og-accent); font-weight: 600; }

/* ─── Feedback ───────────────────────────────────────────── */
.og-feedback {
  background: #f0f6ff;
  border: 1px solid #c5d8f5;
  border-radius: var(--og-radius-lg);
  padding: 14px 18px;
  margin: 14px 0;
}

.og-feedback--new {
  background: #f7f8f9;
  border-color: #d5dade;
}

.og-feedback p { margin: 8px 0; font-size: .9rem; }

/* ─── Submit form ────────────────────────────────────────── */
.og-submit-form { margin-top: 16px; border-top: 1px solid var(--og-border); padding-top: 16px; }
.og-submit-form__row { margin-bottom: 12px; }
.og-submit-form__row label {
  display: block;
  font-size: .78rem;
  font-weight: 700;
  margin-bottom: 6px;
  color: var(--og-muted);
  text-transform: uppercase;
  letter-spacing: .05em;
}

.og-textarea {
  width: 100%;
  padding: 10px 14px;
  border: 1px solid var(--og-border);
  border-radius: var(--og-radius);
  font-size: .9rem;
  font-family: inherit;
  resize: vertical;
  transition: border-color var(--og-transition);
  background: var(--og-bg);
  color: var(--og-text) !important;
}

.og-textarea:focus {
  outline: none;
  border-color: var(--og-primary);
  background: #fff;
  box-shadow: 0 0 0 3px rgba(26,60,110,.08);
}

.og-file-input { font-size: .85rem; }

.og-submitted-note {
  font-size: .86rem;
  color: #2e7d32;
  margin-top: 10px;
  font-weight: 600;
}

.og-submit-msg {
  display: inline-block;
  margin-left: 10px;
  font-size: .86rem;
  font-weight: 600;
}

/* ─── Buttons ────────────────────────────────────────────── */
.og-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 9px 20px;
  border-radius: var(--og-radius);
  font-size: .84rem;
  font-weight: 700;
  cursor: pointer;
  text-decoration: none;
  border: 2px solid transparent;
  letter-spacing: .03em;
  text-transform: uppercase;
  transition: background var(--og-transition), color var(--og-transition),
              border-color var(--og-transition), transform var(--og-transition);
}

.og-btn:active { transform: scale(.97); }

.og-btn--primary {
  background: var(--og-primary);
  color: #fff;
  border-color: var(--og-primary);
}

.og-btn--primary:hover {
  background: var(--og-accent);
  border-color: var(--og-accent);
  color: #fff;
}

.og-btn--secondary {
  background: transparent;
  color: var(--og-primary);
  border-color: var(--og-primary);
}

.og-btn--secondary:hover {
  background: var(--og-primary);
  color: #fff;
}

.og-btn--ghost {
  background: transparent;
  color: var(--og-muted);
  border-color: var(--og-border);
}

.og-btn--ghost:hover {
  background: var(--og-bg);
  color: var(--og-text);
}

.og-btn--small { padding: 5px 12px; font-size: .75rem; }

/* ─── Status badges ──────────────────────────────────────── */
.og-status {
  display: inline-block;
  font-size: .68rem;
  font-weight: 700;
  padding: 3px 9px;
  border-radius: var(--og-radius);
  text-transform: uppercase;
  letter-spacing: .06em;
  border: 1px solid transparent;
}

.og-status--planned,
.og-status--open      { background: #e8edf8; color: #1a3c6e; border-color: #c5d2eb; }
.og-status--held,
.og-status--submitted { background: #e6f4ea; color: #1b5e20; border-color: #b7d9be; }
.og-status--recorded  { background: #ede7f6; color: #4527a0; border-color: #c9b8ec; }
.og-status--reviewing { background: #fff3e0; color: #bf360c; border-color: #ffccbc; }
.og-status--corrected { background: #e0f2f1; color: #004d40; border-color: #b2dfdb; }
.og-status--completed { background: #f3e5f5; color: #6a1b9a; border-color: #e1bee7; }

/* ─── Notification badges ────────────────────────────────── */
.og-badge {
  display: inline-block;
  font-size: .72rem;
  font-weight: 700;
  padding: 3px 10px;
  border-radius: var(--og-radius);
  text-transform: uppercase;
  letter-spacing: .04em;
}

.og-badge--alert { background: var(--og-accent); color: #fff; }
.og-badge--count { background: var(--og-accent); color: #fff; margin-left: 5px; border-radius: 20px; }
.og-badge--new   { background: var(--og-accent); color: #fff; font-size: .68rem; }

/* ─── Notices ────────────────────────────────────────────── */
.og-notice {
  padding: 16px 20px;
  border-radius: var(--og-radius-lg);
  border: 1px solid var(--og-border);
  background: var(--og-bg);
  font-size: .92rem;
}

.og-notice--warn {
  background: #f7f8f9;
  border-color: #d5dade;
  color: var(--og-accent);
}

/* ─── Responsive ─────────────────────────────────────────── */
@media (max-width: 600px) {
  .og-header           { flex-direction: column; }
  .og-header h1        { font-size: 1.25rem; }
  .og-tab              { padding: 9px 14px; font-size: .72rem; }
  .og-card             { padding: 16px; }
  .og-task-card        { padding: 16px; }
  .og-task-card__header { flex-direction: column; }
  .og-class-card__actions { flex-direction: column; }
  .og-summary-grid     { grid-template-columns: repeat(3, 1fr); }
  .og-btn              { padding: 8px 14px; font-size: .78rem; }
}

/* ─── Progress bar (On-Demand) ───────────────────────────────────────────── */
.og-summary-card--progress { border-top-color: var(--og-accent); }
.og-summary-card--progress .og-summary-card__num { color: var(--og-accent); }

.og-progress-bar {
  width: 100%;
  height: 5px;
  background: var(--og-border);
  border-radius: 99px;
  overflow: hidden;
  margin-top: 8px;
}

.og-progress-bar__fill {
  height: 100%;
  background: var(--og-accent);
  border-radius: 99px;
  transition: width .6s ease;
  min-width: 4px;
}