/* ============================================================
   DOPOSCUOLA OPENLAB — Shared Design System
   Mobile-first | Light theme | Green brand
   ============================================================ */

/* ---- Variables ---- */
:root {
  --ol-primary: #41A002;
  --ol-primary-dark: #358001;
  --ol-primary-light: #edfae0;
  --ol-bg: #f5f7fa;
  --ol-surface: #ffffff;
  --ol-text: #1f2937;
  --ol-text-muted: #6b7280;
  --ol-border: #e5e7eb;
  --ol-success: #16a34a;
  --ol-success-bg: #dcfce7;
  --ol-success-border: #86efac;
  --ol-danger: #dc2626;
  --ol-danger-bg: #fee2e2;
  --ol-danger-border: #fca5a5;
  --ol-warning: #d97706;
  --ol-warning-bg: #fef3c7;
  --ol-radius: 10px;
  --ol-radius-sm: 6px;
  --ol-radius-lg: 16px;
  --ol-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
  --ol-shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
  --ol-font: 'Segoe UI', system-ui, -apple-system, sans-serif;
  --ol-header-h: 56px;
}

/* ---- Reset ---- */
*, *::before, *::after {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
}

/* ---- Base ---- */
html {
  font-size: 16px;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--ol-font);
  background: var(--ol-bg);
  color: var(--ol-text);
  line-height: 1.5;
  min-height: 100dvh;
}

a {
  color: var(--ol-primary);
  text-decoration: none;
}

/* ---- Header ---- */
.ol-header {
  position: sticky;
  top: 0;
  z-index: 100;
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--ol-header-h);
  padding: 0 1rem;
  background: var(--ol-primary);
  color: #fff;
  box-shadow: 0 2px 8px rgba(65, 160, 2, 0.3);
}

.ol-header-back {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  border-radius: 50%;
  color: #fff;
  font-size: 1.2rem;
  line-height: 1;
  flex-shrink: 0;
  transition: background 0.15s;
  -webkit-tap-highlight-color: transparent;
}

.ol-header-back:hover {
  background: rgba(255, 255, 255, 0.2);
}

.ol-header-back:active {
  background: rgba(255, 255, 255, 0.3);
}

.ol-header-brand {
  font-size: 0.8rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  opacity: 0.85;
}

.ol-header-title {
  font-size: 1rem;
  font-weight: 600;
}

.ol-header-subject {
  font-size: 0.75rem;
  font-weight: 600;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  background: rgba(255, 255, 255, 0.2);
  padding: 0.2em 0.6em;
  border-radius: 99px;
}

/* ---- Container ---- */
.ol-container {
  width: 100%;
  max-width: 900px;
  margin: 0 auto;
  padding: 1rem;
}

/* ---- Card ---- */
.ol-card {
  background: var(--ol-surface);
  border-radius: var(--ol-radius);
  box-shadow: var(--ol-shadow);
  padding: 1.25rem;
}

.ol-card + .ol-card {
  margin-top: 0.75rem;
}

/* ---- Buttons ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4em;
  min-height: 44px;
  padding: 0.5em 1.2em;
  border: none;
  border-radius: var(--ol-radius-sm);
  font-family: var(--ol-font);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: filter 0.15s, transform 0.1s;
  user-select: none;
  -webkit-tap-highlight-color: transparent;
}

.btn:active {
  transform: scale(0.97);
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

.btn-primary {
  background: var(--ol-primary);
  color: #fff;
}
.btn-primary:hover:not(:disabled) { filter: brightness(1.1); }

.btn-secondary {
  background: var(--ol-border);
  color: var(--ol-text);
}
.btn-secondary:hover:not(:disabled) { filter: brightness(0.95); }

.btn-success {
  background: var(--ol-success);
  color: #fff;
}
.btn-success:hover:not(:disabled) { filter: brightness(1.1); }

.btn-danger {
  background: var(--ol-danger);
  color: #fff;
}
.btn-danger:hover:not(:disabled) { filter: brightness(1.1); }

.btn-outline {
  background: transparent;
  color: var(--ol-primary);
  border: 2px solid var(--ol-primary);
}
.btn-outline:hover:not(:disabled) { background: var(--ol-primary-light); }

.btn-sm {
  min-height: 36px;
  padding: 0.35em 0.9em;
  font-size: 0.82rem;
}

.btn-lg {
  min-height: 52px;
  padding: 0.65em 1.6em;
  font-size: 1rem;
  border-radius: var(--ol-radius);
}

/* ---- Form controls ---- */
label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--ol-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 0.3rem;
}

input[type="number"],
input[type="text"],
select {
  width: 100%;
  min-height: 44px;
  padding: 0.5em 0.75em;
  border: 1.5px solid var(--ol-border);
  border-radius: var(--ol-radius-sm);
  font-family: var(--ol-font);
  font-size: 0.95rem;
  color: var(--ol-text);
  background: var(--ol-surface);
  transition: border-color 0.15s;
  appearance: auto;
}

input[type="number"]:focus,
input[type="text"]:focus,
select:focus {
  outline: none;
  border-color: var(--ol-primary);
}

input[type="range"] {
  width: 100%;
  height: 6px;
  accent-color: var(--ol-primary);
  cursor: pointer;
  margin: 0.5rem 0;
}

input[type="checkbox"] {
  width: 18px;
  height: 18px;
  accent-color: var(--ol-primary);
  cursor: pointer;
  flex-shrink: 0;
}

.ol-field {
  margin-bottom: 0.9rem;
}

.ol-field-row {
  display: flex;
  align-items: center;
  gap: 0.5rem;
  min-height: 44px;
}

/* ---- Feedback states ---- */
.feedback-correct {
  background: var(--ol-success-bg);
  border: 1.5px solid var(--ol-success-border);
  color: var(--ol-success);
  border-radius: var(--ol-radius-sm);
  padding: 0.75rem 1rem;
  font-weight: 600;
}

.feedback-wrong {
  background: var(--ol-danger-bg);
  border: 1.5px solid var(--ol-danger-border);
  color: var(--ol-danger);
  border-radius: var(--ol-radius-sm);
  padding: 0.75rem 1rem;
  font-weight: 600;
}

.feedback-neutral {
  background: var(--ol-bg);
  border: 1.5px solid var(--ol-border);
  color: var(--ol-text-muted);
  border-radius: var(--ol-radius-sm);
  padding: 0.75rem 1rem;
}

/* ---- Layout utilities ---- */
.ol-stack {
  display: flex;
  flex-direction: column;
  gap: 0.75rem;
}

.ol-row {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  gap: 0.75rem;
  align-items: center;
}

.ol-row-btns {
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
}

/* ---- Generic grid ---- */
.ol-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
  gap: 0.6rem;
}

.ol-grid-item {
  background: var(--ol-surface);
  border: 1.5px solid var(--ol-border);
  border-radius: var(--ol-radius-sm);
  padding: 0.6rem 0.8rem;
  display: flex;
  align-items: center;
  gap: 0.5rem;
  cursor: pointer;
  transition: border-color 0.15s, background 0.15s;
  -webkit-tap-highlight-color: transparent;
  min-height: 44px;
}

.ol-grid-item:hover,
.ol-grid-item.selected {
  border-color: var(--ol-primary);
  background: var(--ol-primary-light);
}

/* ---- Canvas wrapper ---- */
.ol-canvas-wrap {
  overflow-x: auto;
  -webkit-overflow-scrolling: touch;
  width: 100%;
  border-radius: var(--ol-radius);
  background: var(--ol-surface);
}

.ol-canvas-wrap canvas {
  display: block;
}

/* ---- Section title ---- */
.ol-section-title {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ol-text-muted);
  padding: 0.25rem 0;
  border-bottom: 1.5px solid var(--ol-border);
  margin-bottom: 0.75rem;
}

/* ---- Score / stat badge ---- */
.ol-stat {
  text-align: center;
  padding: 0.75rem;
  background: var(--ol-surface);
  border-radius: var(--ol-radius-sm);
  box-shadow: var(--ol-shadow);
}

.ol-stat-value {
  font-size: 1.8rem;
  font-weight: 700;
  color: var(--ol-primary);
  line-height: 1;
}

.ol-stat-label {
  font-size: 0.72rem;
  color: var(--ol-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-top: 0.2rem;
}

/* ============================================================
   HOME PAGE — App grid (iOS launcher style)
   ============================================================ */

.ol-home-body {
  background: var(--ol-bg);
}

.ol-categories {
  padding: 1rem 0 2rem;
}

.ol-category {
  padding: 0 1rem 1rem;
}

.ol-category-title {
  font-size: 0.72rem;
  font-weight: 700;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--ol-text-muted);
  padding: 1rem 0 0.5rem;
}

.ol-app-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(76px, 1fr));
  gap: 0.75rem 0.5rem;
}

.ol-app-icon {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 0.35rem;
  padding: 0.5rem 0.25rem;
  border-radius: var(--ol-radius);
  text-decoration: none;
  color: var(--ol-text);
  transition: background 0.15s;
  -webkit-tap-highlight-color: transparent;
}

.ol-app-icon:active {
  background: rgba(0, 0, 0, 0.06);
}

.ol-app-icon-img {
  width: 64px;
  height: 64px;
  border-radius: 16px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.8rem;
  box-shadow: 0 2px 6px rgba(0, 0, 0, 0.15);
  flex-shrink: 0;
}

.ol-app-icon span {
  font-size: 0.68rem;
  font-weight: 500;
  text-align: center;
  line-height: 1.2;
  max-width: 72px;
  overflow: hidden;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  color: var(--ol-text);
}

/* App icon colors per materia */
.ol-app-fisica  { background: #fff3e0; }
.ol-app-mat     { background: #e8eaf6; }
.ol-app-geo     { background: #e8f5e9; }
.ol-app-inglese { background: #e3f2fd; }
.ol-app-francese{ background: #fce4ec; }
.ol-app-musica  { background: #f3e5f5; }

/* ============================================================
   Tablet / Desktop overrides
   ============================================================ */
@media (min-width: 768px) {
  .ol-app-grid {
    grid-template-columns: repeat(auto-fill, minmax(88px, 1fr));
    gap: 1rem 0.75rem;
  }

  .ol-app-icon-img {
    width: 72px;
    height: 72px;
  }

  .ol-app-icon span {
    font-size: 0.75rem;
  }

  .ol-header-brand {
    font-size: 0.9rem;
  }

  .ol-header-title {
    font-size: 1.1rem;
  }
}