/* ====== LA TODO DU SILEX — Dark Premium ====== */
:root {
  --bg: #05060f;
  --bg-card: #0d0f1a;
  --bg-column: #0a0c16;
  --bg-hover: #141728;
  --border: #1a1d2e;
  --text: #e4e6f0;
  --text-muted: #8a8ea0;
  --accent: #0c67ff;
  --accent-hover: #2a7fff;
  --green: #22c55e;
  --yellow: #eab308;
  --red: #ef4444;
  --orange: #f97316;
  --radius: 12px;
  --radius-sm: 8px;
  --shadow: 0 4px 24px rgba(0,0,0,.4);
}

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

body {
  font-family: 'Inter', -apple-system, sans-serif;
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
}

/* ====== LOGIN ====== */
.login-screen {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  background: linear-gradient(135deg, #05060f 0%, #0d1117 50%, #0c1929 100%);
  padding: 1rem;
}
.login-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 2.5rem;
  width: 100%;
  max-width: 400px;
  box-shadow: var(--shadow);
  text-align: center;
}
.login-logo { margin-bottom: 1.5rem; }
.login-card h1 { font-size: 1.5rem; font-weight: 800; margin-bottom: .25rem; }
.login-subtitle { color: var(--text-muted); font-size: .9rem; margin-bottom: 2rem; }
.login-error { color: var(--red); font-size: .85rem; margin-top: 1rem; }

.form-group { margin-bottom: 1rem; text-align: left; }
.form-group label { display: block; font-size: .8rem; font-weight: 600; color: var(--text-muted); margin-bottom: .35rem; text-transform: uppercase; letter-spacing: .5px; }
.form-group input, .form-group select, .form-group textarea {
  width: 100%;
  padding: .75rem 1rem;
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  color: var(--text);
  font-family: inherit;
  font-size: .95rem;
  transition: border-color .2s;
}
.form-group input:focus, .form-group select:focus, .form-group textarea:focus {
  outline: none;
  border-color: var(--accent);
}
.form-group textarea { min-height: 80px; resize: vertical; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }

.btn-login {
  width: 100%;
  padding: .85rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: 1rem;
  font-weight: 700;
  cursor: pointer;
  transition: background .2s, transform .1s;
  margin-top: .5rem;
}
.btn-login:hover { background: var(--accent-hover); }
.btn-login:active { transform: scale(.98); }

/* ====== HEADER ====== */
.app-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: .75rem 1.5rem;
  background: var(--bg-card);
  border-bottom: 1px solid var(--border);
  position: sticky;
  top: 0;
  z-index: 100;
}
.header-left {
  display: flex;
  align-items: center;
  gap: .75rem;
}
.header-left h1 { font-size: 1.15rem; font-weight: 800; }
.header-right { display: flex; align-items: center; gap: .75rem; }

.btn-add {
  padding: .5rem 1.25rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-size: .9rem;
  font-weight: 700;
  cursor: pointer;
  transition: background .2s, transform .1s;
}
.btn-add:hover { background: var(--accent-hover); }
.btn-add:active { transform: scale(.97); }

.btn-logout {
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  padding: .5rem .75rem;
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-size: 1rem;
  transition: color .2s, border-color .2s;
}
.btn-logout:hover { color: var(--red); border-color: var(--red); }

/* ====== BOARD ====== */
.board {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 1.25rem;
  padding: 1.25rem;
  min-height: calc(100vh - 60px);
}

.column {
  background: var(--bg-column);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  display: flex;
  flex-direction: column;
  min-height: 300px;
}

.column-header {
  display: flex;
  align-items: center;
  gap: .5rem;
  padding: 1rem 1.25rem;
  border-bottom: 1px solid var(--border);
}
.column-header h2 { font-size: .95rem; font-weight: 700; flex: 1; }
.column-dot { width: 10px; height: 10px; border-radius: 50%; }
.dot-todo { background: var(--yellow); }
.dot-doing { background: var(--accent); }
.dot-done { background: var(--green); }
.column-count {
  background: var(--bg);
  color: var(--text-muted);
  font-size: .75rem;
  font-weight: 700;
  padding: .15rem .5rem;
  border-radius: 99px;
  min-width: 24px;
  text-align: center;
}

.column-tasks {
  padding: .75rem;
  flex: 1;
  overflow-y: auto;
  display: flex;
  flex-direction: column;
  gap: .5rem;
}

/* ====== TASK CARD ====== */
.task-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: .85rem 1rem;
  cursor: pointer;
  transition: background .15s, border-color .15s, transform .1s;
  position: relative;
}
.task-card:hover {
  background: var(--bg-hover);
  border-color: var(--accent);
  transform: translateY(-1px);
}
.task-card.priority-high { border-left: 3px solid var(--red); }
.task-card.priority-medium { border-left: 3px solid var(--yellow); }
.task-card.priority-low { border-left: 3px solid var(--green); }
.task-card.status-done { opacity: .6; }
.task-card.status-done .task-card-title { text-decoration: line-through; }

.task-card-title {
  font-size: .9rem;
  font-weight: 600;
  margin-bottom: .25rem;
  line-height: 1.3;
}
.task-card-desc {
  font-size: .8rem;
  color: var(--text-muted);
  line-height: 1.4;
  margin-bottom: .5rem;
  display: -webkit-box;
  -webkit-line-clamp: 2;
  -webkit-box-orient: vertical;
  overflow: hidden;
}
.task-card-meta {
  display: flex;
  align-items: center;
  gap: .5rem;
  font-size: .75rem;
  color: var(--text-muted);
}
.task-card-priority {
  font-size: .7rem;
  padding: .1rem .4rem;
  border-radius: 4px;
  font-weight: 600;
}
.priority-badge-high { background: rgba(239,68,68,.15); color: var(--red); }
.priority-badge-medium { background: rgba(234,179,8,.15); color: var(--yellow); }
.priority-badge-low { background: rgba(34,197,94,.15); color: var(--green); }
.task-card-due { margin-left: auto; }
.task-card-due.overdue { color: var(--red); font-weight: 600; }

.task-card-actions {
  position: absolute;
  top: .5rem;
  right: .5rem;
  display: flex;
  gap: .25rem;
  opacity: 0;
  transition: opacity .15s;
}
.task-card:hover .task-card-actions { opacity: 1; }
.task-card-actions button {
  background: var(--bg);
  border: 1px solid var(--border);
  border-radius: 4px;
  color: var(--text-muted);
  width: 26px;
  height: 26px;
  cursor: pointer;
  font-size: .75rem;
  display: flex;
  align-items: center;
  justify-content: center;
  transition: color .15s, border-color .15s;
}
.task-card-actions button:hover { color: var(--accent); border-color: var(--accent); }
.task-card-actions .btn-check:hover { color: var(--green); border-color: var(--green); }

/* ====== MODAL ====== */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,.6);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 200;
  padding: 1rem;
}
.modal-card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  width: 100%;
  max-width: 500px;
  box-shadow: var(--shadow);
  animation: modalIn .2s ease;
}
@keyframes modalIn { from { opacity: 0; transform: translateY(20px) scale(.96); } }

.modal-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem;
  border-bottom: 1px solid var(--border);
}
.modal-header h2 { font-size: 1.1rem; font-weight: 700; }
.modal-close {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.2rem;
  cursor: pointer;
  padding: .25rem;
}
.modal-close:hover { color: var(--text); }

#task-form { padding: 1.5rem; }

.modal-actions {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-top: 1.25rem;
  padding-top: 1.25rem;
  border-top: 1px solid var(--border);
}
.modal-actions-right { display: flex; gap: .5rem; }

.btn-save {
  padding: .6rem 1.5rem;
  background: var(--accent);
  color: #fff;
  border: none;
  border-radius: var(--radius-sm);
  font-weight: 700;
  cursor: pointer;
  transition: background .2s;
}
.btn-save:hover { background: var(--accent-hover); }

.btn-cancel {
  padding: .6rem 1.25rem;
  background: none;
  border: 1px solid var(--border);
  color: var(--text-muted);
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: color .2s;
}
.btn-cancel:hover { color: var(--text); }

.btn-delete {
  padding: .6rem 1.25rem;
  background: rgba(239,68,68,.1);
  border: 1px solid rgba(239,68,68,.3);
  color: var(--red);
  border-radius: var(--radius-sm);
  cursor: pointer;
  font-weight: 600;
  transition: background .2s;
}
.btn-delete:hover { background: rgba(239,68,68,.2); }

/* ====== DRAG & DROP ====== */
.task-card.dragging { opacity: .4; transform: rotate(2deg); }
.column-tasks.drag-over { background: rgba(12,103,255,.05); border-radius: var(--radius-sm); }

/* ====== EMPTY STATE ====== */
.empty-state {
  display: flex;
  align-items: center;
  justify-content: center;
  flex: 1;
  color: var(--text-muted);
  font-size: .85rem;
  font-style: italic;
  padding: 2rem 1rem;
  text-align: center;
}

/* ====== RESPONSIVE ====== */
@media (max-width: 900px) {
  .board {
    grid-template-columns: 1fr;
    padding: 1rem;
    gap: 1rem;
  }
  .column { min-height: 200px; }
}

@media (max-width: 500px) {
  .app-header { padding: .5rem 1rem; }
  .header-left h1 { font-size: 1rem; }
  .btn-add { padding: .4rem .8rem; font-size: .8rem; }
}

/* ====== SCROLLBAR ====== */
.column-tasks::-webkit-scrollbar { width: 4px; }
.column-tasks::-webkit-scrollbar-track { background: transparent; }
.column-tasks::-webkit-scrollbar-thumb { background: var(--border); border-radius: 2px; }

/* ====== TOAST ====== */
.toast {
  position: fixed;
  bottom: 1.5rem;
  right: 1.5rem;
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: .75rem 1.25rem;
  color: var(--text);
  font-size: .9rem;
  box-shadow: var(--shadow);
  z-index: 300;
  animation: toastIn .3s ease, toastOut .3s ease 2.7s forwards;
}
@keyframes toastIn { from { opacity: 0; transform: translateY(20px); } }
@keyframes toastOut { to { opacity: 0; transform: translateY(20px); } }