/* ── Style guide PLAI — partagé Login + TeacherDashboard ── */
:root {
  --bg: #faf9f7;
  --surface: #ffffff;
  --surface2: #f4f2ee;
  --border: #e8e4dd;
  --border2: #d4cfc6;
  --text: #1a1814;
  --text2: #5a564f;
  --text3: #9a958c;
  --teal: #0f6e56;
  --teal-bg: #e1f5ee;
  --teal-border: #1d9e75;
  --radius: 10px;
  --radius-sm: 6px;
}

* { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }

body {
  font-family: 'DM Sans', sans-serif;
  background: var(--bg);
  color: var(--text);
  font-size: 15px;
  line-height: 1.7;
}

/* ── NAV ── */
.plai-nav {
  position: sticky; top: 0; z-index: 100;
  background: rgba(250,249,247,0.92);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--border);
  padding: 0 2rem;
  display: flex; align-items: center; justify-content: space-between;
  height: 52px;
}
.plai-nav-logo {
  font-family: 'DM Serif Display', serif;
  font-size: 18px; color: var(--text); text-decoration: none;
  display: flex; align-items: center; gap: 10px;
  background: none; border: none; cursor: pointer; padding: 0;
}
.plai-nav-actions { display: flex; gap: 6px; align-items: center; }
.plai-nav-link {
  font-size: 12px; font-weight: 500; padding: 5px 10px;
  border-radius: var(--radius-sm); text-decoration: none;
  color: var(--text2); background: none; border: none; cursor: pointer;
  transition: background 0.15s, color 0.15s;
}
.plai-nav-link:hover { background: var(--surface2); color: var(--text); }

/* ── BANNER ── */
.plai-banner {
  background: var(--teal-bg);
  border-bottom: 1px solid var(--teal-border);
  padding: 0.65rem 2rem;
  text-align: center;
  font-size: 13px;
  color: var(--teal);
}
.plai-banner a { color: var(--teal); font-weight: 500; }

/* ── CONTAINER ── */
.plai-container { max-width: 760px; margin: 0 auto; padding: 0 1.5rem; }

/* ── SECTION ── */
.plai-section {
  padding: 2.5rem 0 2rem;
  border-top: 1px solid var(--border);
}
.plai-section:first-child { border-top: none; }

.plai-section h2 {
  font-family: 'DM Serif Display', serif;
  font-size: 22px; margin-bottom: 1.25rem; color: var(--text);
}

/* ── CARD ── */
.plai-card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 1.25rem 1.5rem;
}
.plai-card + .plai-card { margin-top: 0.75rem; }

/* ── BUTTONS ── */
.plai-btn {
  background: var(--teal); color: #fff;
  border: none; border-radius: var(--radius-sm);
  padding: 9px 18px; font-size: 14px; font-weight: 500;
  font-family: 'DM Sans', sans-serif; cursor: pointer;
  transition: opacity 0.15s;
}
.plai-btn:hover { opacity: 0.88; }
.plai-btn:disabled { opacity: 0.45; cursor: not-allowed; }

.plai-btn-ghost {
  background: none; border: 1px solid var(--border2);
  border-radius: var(--radius-sm); padding: 8px 16px;
  font-size: 14px; color: var(--text2);
  font-family: 'DM Sans', sans-serif; cursor: pointer;
  transition: background 0.15s;
}
.plai-btn-ghost:hover { background: var(--surface2); }

/* ── FORM ── */
.plai-field { margin-bottom: 1rem; }
.plai-label {
  display: block; font-size: 13px; font-weight: 500;
  color: var(--text2); margin-bottom: 4px;
}
.plai-input {
  width: 100%; border: 1px solid var(--border2); border-radius: var(--radius-sm);
  padding: 9px 12px; font-size: 15px; font-family: 'DM Sans', sans-serif;
  background: var(--bg); color: var(--text); outline: none; transition: border 0.15s;
}
.plai-input:focus { border-color: var(--teal); box-shadow: 0 0 0 3px rgba(15,110,86,0.1); }

select.plai-input { cursor: pointer; }
textarea.plai-input { resize: vertical; }

/* ── FOOTER ── */
.plai-footer {
  text-align: center; padding: 3rem 0 2.5rem;
  font-size: 13px; color: var(--text3);
  border-top: 1px solid var(--border); margin-top: 1rem;
}
.plai-footer a { color: var(--text2); }
.plai-footer p + p { margin-top: 6px; }

/* ── BADGE ── */
.plai-badge {
  display: inline-flex; align-items: center; gap: 6px;
  font-size: 11px; font-weight: 500; text-transform: uppercase; letter-spacing: 1px;
  color: var(--text3); border: 1px solid var(--border2);
  padding: 4px 14px; border-radius: 20px; margin-bottom: 1.5rem;
}

/* ── EMPTY STATE ── */
.plai-empty {
  text-align: center; padding: 3rem 0; color: var(--text3);
  font-family: 'DM Serif Display', serif; font-style: italic; font-size: 17px;
}

/* ── ERROR ── */
.plai-error {
  background: #fcebeb; border: 1px solid #e24b4a;
  color: #a32d2d; border-radius: var(--radius-sm);
  padding: 0.6rem 0.9rem; font-size: 13px; margin-bottom: 0.75rem;
}

/* ── SUCCESS ── */
.plai-success {
  background: var(--teal-bg); border: 1px solid var(--teal-border);
  color: var(--teal); border-radius: var(--radius-sm);
  padding: 0.6rem 0.9rem; font-size: 13px; margin-bottom: 0.75rem;
}