/* =====================================================
   ULM Progress Tracker — Design System
   Pastel, modern, mobile-first
   ===================================================== */

:root {
  --sky:       #e8f0fe;
  --sky-mid:   #c5d8fd;
  --sky-dark:  #4a7fd4;
  --sky-btn:   #5b8ee8;
  --mint:      #e6f4ea;
  --mint-dark: #34a853;
  --peach:     #fde8e4;
  --peach-dark:#e05a3a;
  --lavender:  #f3eeff;
  --lav-dark:  #7c4dff;
  --gold:      #fff8e1;
  --gold-dark: #f9a825;
  --surface:   #ffffff;
  --bg:        #f0f4ff;
  --border:    #dde3f0;
  --text:      #1a1d2e;
  --text-sec:  #6b7280;
  --bar-empty: #e2e8f0;
  --radius:    14px;
  --radius-sm: 8px;
  --shadow:    0 2px 12px rgba(74,127,212,0.10);
  --shadow-md: 0 4px 24px rgba(74,127,212,0.14);
  --font: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
}

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

html { height: 100%; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100%;
  -webkit-text-size-adjust: 100%;
  overflow-x: hidden;
}

/* ===== SCREENS ===== */
.screen { display: none; min-height: 100dvh; flex-direction: column; }
.screen.active { display: flex; }

/* ===== LOGIN ===== */
.login-wrap {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100dvh;
  padding: 24px;
  background: linear-gradient(160deg, var(--sky) 0%, #ffffff 60%, var(--lavender) 100%);
}
.login-logo { text-align: center; margin-bottom: 32px; }
.login-plane { font-size: 56px; margin-bottom: 12px; }
.login-logo h1 { font-size: 28px; font-weight: 700; color: var(--sky-dark); }
.login-logo p { color: var(--text-sec); margin-top: 4px; }

/* ===== CARDS ===== */
.card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 20px;
  margin: 0 16px 16px;
}

/* ===== HEADER ===== */
.app-header {
  background: var(--surface);
  border-bottom: 1px solid var(--border);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  position: sticky;
  top: 0;
  z-index: 100;
  box-shadow: 0 1px 8px rgba(0,0,0,0.06);
}
.header-left { display: flex; align-items: center; gap: 8px; flex: 1; }
.header-logo { font-size: 22px; }
.header-title { font-size: 18px; font-weight: 600; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.header-actions { display: flex; gap: 4px; }

/* ===== BUTTONS ===== */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 6px;
  border: none; border-radius: var(--radius-sm); cursor: pointer;
  font-size: 15px; font-weight: 600; padding: 11px 20px;
  transition: all .15s ease; text-decoration: none;
  -webkit-tap-highlight-color: transparent;
}
.btn-primary { background: var(--sky-btn); color: #fff; }
.btn-primary:hover { background: var(--sky-dark); }
.btn-primary:active { transform: scale(0.97); }
.btn-ghost { background: transparent; color: var(--text-sec); border: 1.5px solid var(--border); }
.btn-ghost:hover { background: var(--bg); }
.btn-full { width: 100%; }
.btn-danger { background: var(--peach); color: var(--peach-dark); }
.btn-media {
  display: inline-flex; align-items: center; gap: 6px;
  background: var(--sky); color: var(--sky-dark);
  border: 1.5px solid var(--sky-mid); border-radius: 20px;
  padding: 8px 16px; font-size: 14px; font-weight: 600; cursor: pointer;
  transition: all .15s;
}
.btn-media svg { width: 16px; height: 16px; }
.btn-media:hover { background: var(--sky-mid); }
.btn-media.recording { background: var(--peach); color: var(--peach-dark); border-color: #f4b8ab; }
.btn-icon {
  width: 40px; height: 40px;
  display: flex; align-items: center; justify-content: center;
  background: transparent; border: none; border-radius: 50%;
  cursor: pointer; color: var(--text-sec);
  transition: background .15s;
  -webkit-tap-highlight-color: transparent;
}
.btn-icon svg { width: 20px; height: 20px; }
.btn-icon:hover { background: var(--bg); }
.btn-icon:active { background: var(--border); }

/* ===== FIELDS ===== */
.field { margin-bottom: 18px; }
.field label { display: block; font-size: 13px; font-weight: 600; color: var(--text-sec); margin-bottom: 6px; text-transform: uppercase; letter-spacing: .04em; }
input[type=text], input[type=password], input[type=date], input[type=search], input[type=email], textarea, select {
  width: 100%; border: 1.5px solid var(--border); border-radius: var(--radius-sm);
  padding: 12px 14px; font-size: 16px; font-family: var(--font);
  background: var(--surface); color: var(--text);
  transition: border-color .15s;
  outline: none;
  -webkit-appearance: none;
}
input:focus, textarea:focus { border-color: var(--sky-btn); box-shadow: 0 0 0 3px rgba(91,142,232,0.15); }
textarea { resize: vertical; }

/* Toggle group */
.toggle-group { display: flex; gap: 10px; }
.toggle-option { flex: 1; }
.toggle-option input { display: none; }
.toggle-option span {
  display: block; text-align: center; padding: 11px;
  border: 1.5px solid var(--border); border-radius: var(--radius-sm);
  cursor: pointer; font-size: 15px; font-weight: 600; color: var(--text-sec);
  transition: all .15s;
}
.toggle-option input:checked + span {
  background: var(--sky); color: var(--sky-dark); border-color: var(--sky-mid);
}

/* Error */
.error-msg { background: var(--peach); color: var(--peach-dark); border-radius: var(--radius-sm); padding: 10px 14px; font-size: 14px; margin-bottom: 14px; }
.hidden { display: none !important; }

/* ===== SEARCH BAR ===== */
.search-bar { padding: 12px 16px; background: var(--surface); border-bottom: 1px solid var(--border); }
.search-bar input { background: var(--bg); font-size: 15px; }

/* ===== STUDENTS LIST ===== */
.students-list { padding: 16px; display: flex; flex-direction: column; gap: 12px; }

.student-card {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 16px 18px;
  display: flex;
  align-items: center;
  gap: 14px;
  cursor: pointer;
  transition: transform .15s, box-shadow .15s;
  border-left: 4px solid transparent;
  -webkit-tap-highlight-color: transparent;
}
.student-card:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }
.student-card:active { transform: scale(0.985); }
.student-card.multiaxes { border-left-color: var(--sky-btn); }
.student-card.pendulaire { border-left-color: var(--lav-dark); }

.student-avatar {
  width: 46px; height: 46px; border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  font-size: 20px; flex-shrink: 0;
}
.multiaxes .student-avatar { background: var(--sky); }
.pendulaire .student-avatar { background: var(--lavender); }

.student-card-info { flex: 1; min-width: 0; }
.student-card-name { font-size: 16px; font-weight: 700; color: var(--text); white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.student-card-meta { font-size: 13px; color: var(--text-sec); margin-top: 3px; }
.student-card-badge {
  font-size: 11px; font-weight: 700; padding: 3px 8px; border-radius: 20px; white-space: nowrap;
}
.badge-multiaxes { background: var(--sky); color: var(--sky-dark); }
.badge-pendulaire { background: var(--lavender); color: var(--lav-dark); }

.student-progress-mini { display: flex; align-items: center; gap: 8px; margin-top: 8px; }
.progress-bar-mini { flex: 1; height: 6px; background: var(--bar-empty); border-radius: 3px; overflow: hidden; }
.progress-bar-mini-fill { height: 100%; background: linear-gradient(90deg, var(--sky-btn), var(--mint-dark)); border-radius: 3px; transition: width .4s ease; }
.progress-pct { font-size: 12px; font-weight: 700; color: var(--sky-dark); }

/* ===== EMPTY STATE ===== */
.empty-state { flex: 1; display: flex; flex-direction: column; align-items: center; justify-content: center; gap: 14px; padding: 40px; text-align: center; color: var(--text-sec); }
.empty-icon { font-size: 56px; }

/* ===== STUDENT INFO CARD ===== */
.student-info-card { margin-top: 16px; }
.info-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 14px; }
.info-item label { font-size: 11px; text-transform: uppercase; letter-spacing: .05em; color: var(--text-sec); font-weight: 600; }
.info-item .info-value { font-size: 15px; font-weight: 600; color: var(--text); margin-top: 3px; }
.info-type-badge { display: inline-block; padding: 4px 12px; border-radius: 20px; font-size: 13px; font-weight: 700; }

.overall-progress { margin-top: 14px; padding-top: 14px; border-top: 1px solid var(--border); }
.overall-label { font-size: 13px; color: var(--text-sec); font-weight: 600; margin-bottom: 8px; display: flex; justify-content: space-between; }
.overall-bar { height: 10px; background: var(--bar-empty); border-radius: 5px; overflow: hidden; }
.overall-bar-fill { height: 100%; background: linear-gradient(90deg, var(--sky-btn), var(--mint-dark)); border-radius: 5px; transition: width .6s ease; }

/* ===== SECTION LABEL ===== */
.section-label { padding: 8px 20px 4px; font-size: 12px; text-transform: uppercase; letter-spacing: .06em; color: var(--text-sec); font-weight: 700; }

/* ===== PROGRESS LIST ===== */
.progress-list { padding: 0 16px 16px; display: flex; flex-direction: column; gap: 8px; }

.acquisition-row {
  background: var(--surface);
  border-radius: var(--radius);
  box-shadow: var(--shadow);
  padding: 14px 16px;
  display: flex;
  align-items: center;
  gap: 12px;
}
.acquisition-row.completed { background: linear-gradient(135deg, #f0fdf4, var(--surface)); border-left: 3px solid var(--mint-dark); }

.acq-name {
  flex: 1; font-size: 13.5px; font-weight: 500; color: var(--text);
  line-height: 1.4;
}
.acq-name .acq-sub { font-size: 11px; color: var(--text-sec); margin-top: 2px; }
.acq-check { font-size: 18px; flex-shrink: 0; opacity: 0; transition: opacity .2s; }
.completed .acq-check { opacity: 1; }

/* 5-bar progress widget */
.bars-widget { display: flex; gap: 4px; flex-shrink: 0; }
.bar-seg {
  width: 10px; height: 28px; border-radius: 4px;
  background: var(--bar-empty);
  cursor: pointer;
  transition: background .15s, transform .1s;
  -webkit-tap-highlight-color: transparent;
}
.bar-seg:hover { transform: scaleY(1.08); }
.bar-seg:active { transform: scaleY(0.95); }
.bar-seg.filled { background: var(--sky-btn); }
.acquisition-row.completed .bar-seg.filled { background: var(--mint-dark); }
.bar-seg.readonly { cursor: default !important; pointer-events: none; }
.bar-seg.readonly:hover { transform: none !important; }

/* Notes icon */
.notes-btn {
  width: 32px; height: 32px;
  display: flex; align-items: center; justify-content: center;
  border: none; border-radius: 50%; cursor: pointer;
  font-size: 16px; flex-shrink: 0;
  transition: all .15s;
  -webkit-tap-highlight-color: transparent;
}
.notes-btn.has-notes { background: var(--gold); }
.notes-btn.no-notes { background: var(--bg); color: var(--text-sec); opacity: .6; }
.notes-btn:hover { opacity: 1; transform: scale(1.1); }

/* ===== SOLO AUTH ===== */
.solo-auth-section { margin-bottom: 32px; }
.solo-auth-section h3 { font-size: 14px; font-weight: 700; color: var(--text-sec); text-transform: uppercase; letter-spacing: .05em; margin-bottom: 10px; }
.solo-auth-value { font-size: 17px; font-weight: 700; color: var(--text); }
.solo-auth-empty { color: var(--text-sec); font-style: italic; font-size: 14px; }

/* ===== MODALS ===== */
.modal-overlay {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(0,0,0,.4);
  display: flex; align-items: flex-end; justify-content: center;
  backdrop-filter: blur(4px);
  -webkit-backdrop-filter: blur(4px);
}
@media (min-width: 600px) { .modal-overlay { align-items: center; } }

.modal {
  background: var(--surface);
  border-radius: var(--radius) var(--radius) 0 0;
  width: 100%; max-width: 600px; max-height: 92dvh;
  overflow-y: auto; box-shadow: var(--shadow-md);
  animation: slideUp .25s ease;
}
@media (min-width: 600px) { .modal { border-radius: var(--radius); max-height: 88vh; } }
.modal-large { max-width: 680px; }

@keyframes slideUp {
  from { transform: translateY(40px); opacity: 0; }
  to   { transform: translateY(0);    opacity: 1; }
}

.modal-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 20px 14px;
  border-bottom: 1px solid var(--border);
  position: sticky; top: 0; background: var(--surface); z-index: 1;
}
.modal-header h2 { font-size: 18px; font-weight: 700; }
.modal-body { padding: 20px; }
.modal-actions { display: flex; gap: 10px; justify-content: flex-end; margin-top: 20px; }

/* ===== MEDIA SECTION ===== */
.media-section { margin-top: 16px; padding-top: 16px; border-top: 1px solid var(--border); }
.media-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-bottom: 14px; }
.audio-timer { background: var(--peach); color: var(--peach-dark); border-radius: 20px; padding: 6px 14px; font-size: 14px; font-weight: 700; display: inline-flex; align-items: center; gap: 6px; margin-bottom: 12px; }

.media-list { display: flex; flex-direction: column; gap: 10px; }
.media-item {
  display: flex; align-items: center; gap: 10px;
  background: var(--bg); border-radius: var(--radius-sm); padding: 10px 12px;
}
.media-item-icon { font-size: 22px; flex-shrink: 0; }
.media-item-info { flex: 1; min-width: 0; }
.media-item-name { font-size: 13px; font-weight: 600; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; }
.media-item-type { font-size: 11px; color: var(--text-sec); text-transform: uppercase; }
.media-item img { max-width: 100%; border-radius: var(--radius-sm); margin-top: 8px; }
.media-item audio { width: 100%; margin-top: 8px; }
.btn-delete-media { background: none; border: none; color: var(--peach-dark); cursor: pointer; font-size: 18px; padding: 4px; border-radius: 50%; transition: background .15s; }
.btn-delete-media:hover { background: var(--peach); }

/* ===== SHARE ===== */
.share-info { color: var(--text-sec); font-size: 14px; margin-bottom: 16px; line-height: 1.6; }
.share-link-box { display: flex; gap: 8px; }
.share-link-box input { font-size: 13px; background: var(--bg); }
.share-copied { color: var(--mint-dark); font-size: 14px; font-weight: 600; margin-top: 8px; }

/* ===== TOAST ===== */
.toast {
  position: fixed; bottom: 24px; left: 50%; transform: translateX(-50%);
  background: var(--text); color: #fff;
  padding: 12px 24px; border-radius: 24px; font-size: 14px; font-weight: 600;
  z-index: 999; box-shadow: var(--shadow-md);
  animation: fadeInUp .2s ease;
  white-space: nowrap;
}
@keyframes fadeInUp {
  from { opacity: 0; transform: translateX(-50%) translateY(10px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}

/* ===== DESKTOP ===== */
@media (min-width: 768px) {
  .screen { max-width: 800px; margin: 0 auto; }
  body { background: var(--bg); }
  .acquisition-row { padding: 12px 18px; }
  .acq-name { font-size: 14px; }
  .bar-seg { width: 12px; height: 32px; }
}

/* ===== DELETE ZONE in student card ===== */
.student-card-del {
  background: none; border: none; color: var(--border); cursor: pointer; font-size: 16px; padding: 6px;
  border-radius: 50%; transition: all .15s; flex-shrink: 0;
}
.student-card-del:hover { background: var(--peach); color: var(--peach-dark); }