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

:root {
  --bg: #181818;
  --bg-dark: #111;
  --bg-raised: #222;
  --border: #2a2a2a;
  --border-muted: #1e1e1e;
  --text: #F8F8F8;
  --text-muted: #666;
  --text-failed: #444;
  --accent: #AC4242;
  --fail: #444;
}

body {
  background: var(--bg);
  color: var(--text);
  font-family: system-ui, sans-serif;
  min-height: 100vh;
  max-width: 480px;
  margin: 0 auto;
}

.hidden {
  display: none !important;
}

/* ── LOGIN ── */

#screen-login {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  min-height: 100vh;
  gap: 2rem;
}

#screen-login h1 {
  font-size: 2.5rem;
  font-weight: 500;
  letter-spacing: 6px;
  color: var(--text);
}

.login-form {
  display: flex;
  flex-direction: column;
  gap: 12px;
  width: 260px;
}

/* ── INPUTS Y BOTONES ── */

input {
  background: var(--bg-raised);
  border: 1px solid var(--border);
  border-radius: 8px;
  color: var(--text);
  font-size: 14px;
  padding: 10px 14px;
  outline: none;
  width: 100%;
}

input:focus {
  border-color: var(--accent);
}

input::placeholder {
  color: var(--text-muted);
}

button {
  border-radius: 8px;
  font-size: 14px;
  padding: 10px 14px;
  cursor: pointer;
  border: 1px solid var(--border);
  background: transparent;
  color: var(--text);
  width: 100%;
  letter-spacing: 0.5px;
}

button:hover {
  background: var(--bg-raised);
}

button:disabled {
  opacity: 0.3;
  cursor: not-allowed;
}

.error-msg {
  font-size: 13px;
  color: var(--accent);
  min-height: 18px;
}

/* ── NAVBAR ── */

.navbar {
  background: var(--bg-dark);
  padding: 12px 16px;
  display: flex;
  justify-content: center;
  align-items: center;
  border-bottom: 1px solid var(--border);
  position: relative;
}

.navbar-btn {
  width: auto;
/*
  padding: 7px 20px;
  background: var(--bg-raised);
  letter-spacing: 1px;
*/
}

.dropdown {
  position: absolute;
  top: 100%;
  left: 0;
  right: 0;
  background: var(--bg-dark);
  border-bottom: 1px solid var(--border);
  z-index: 100;
}

.dropdown-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 13px 16px;
  border-bottom: 1px solid var(--border-muted);
  cursor: pointer;
}

.dropdown-item:hover {
  background: #1a1a1a;
}

.dropdown-username {
  font-size: 14px;
  color: var(--text);
}

.dropdown-username.muted {
  color: var(--text-muted);
}

.gear-icon {
  width: 18px;
  height: 18px;
  color: var(--text-muted);
  flex-shrink: 0;
}

.gear-icon:hover {
  color: var(--accent);
}

/* ── DÍA ── */

.day-title {
  text-align: center;
  padding: 20px 16px 16px;
  font-size: 2.5rem;
  font-weight: 500;
  letter-spacing: 3px;
}

/* ── PESTAÑAS ── */

.tabs {
  display: grid;
  grid-template-columns: 1fr 1fr 1fr;
  border-bottom: 1px solid var(--border);
}

.tab {
  text-align: center;
  padding: 10px 0;
  font-size: 13px;
  color: var(--text-muted);
  cursor: pointer;
  border-bottom: 2px solid transparent;
  letter-spacing: 1px;
}

.tab.active {
  color: var(--text);
  border-bottom: 2px solid var(--accent);
}

/* ── CANVAS ── */

.canvas {
  padding: 8px 16px;
}

.task-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
  padding: 11px 0;
  border-bottom: 1px solid var(--border-muted);
}

.task-text {
  font-size: 15px;
  color: var(--text);
  flex: 1;
  word-break: break-word;
  line-height: 1.5;
}

.check {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  margin-top: 2px;
}

.delete-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 20px;
  width: auto;
  padding: 0;
  line-height: 1;
  cursor: pointer;
  flex-shrink: 0;
  margin-top: 1px;
}

.task-text.failed {
  color: var(--text-failed);
}

/* ── CAJAS ── */

.check {
  width: 20px;
  height: 20px;
  border-radius: 4px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.check.empty {
  border: 1.5px solid #444;
  background: transparent;
  cursor: pointer;
}

.check.done {
  background: var(--accent);
}

.check.fail {
  background: var(--fail);
}

.check.done::after,
.check.fail::after {
  display: block;
}

.check.done::after {
  content: '';
  width: 5px;
  height: 9px;
  border: 2px solid #F8F8F8;
  border-top: none;
  border-left: none;
  transform: rotate(45deg) translateY(-1px);
}

.check.fail::after {
  content: '×';
  color: #F8F8F8;
  font-size: 15px;
  line-height: 1;
}

/* ── BOTÓN ELIMINAR (mañana) ── */

.delete-btn {
  background: transparent;
  border: none;
  color: var(--text-muted);
  font-size: 20px;
  width: auto;
  padding: 0;
  line-height: 1;
  cursor: pointer;
}

.delete-btn:hover {
  color: var(--accent);
  background: transparent;
}

/* ── BOTÓN AGREGAR ── */

.add-btn {
  background: transparent;
  border: 1px solid var(--accent);
  color: var(--text);
  letter-spacing: 0.5px;
}

.add-btn:hover {
  background: transparent;
  color: var(--text);
}


/* ── CUENTA ── */

.cuenta-header {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 16px;
  border-bottom: 1px solid var(--border);
  background: var(--bg-dark);
  position: relative;
}

.cuenta-header h2 {
  font-size: 16px;
  font-weight: 500;
  letter-spacing: 1px;
  text-transform: uppercase;
  position: absolute;
  left: 0;
  right: 0;
  text-align: center;
  pointer-events: none;
}

*.back-btn {
  width: auto;
}

.cuenta-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
  padding: 20px 16px;
}

.cuenta-form label {
  font-size: 12px;
  color: var(--text-muted);
  letter-spacing: 0.5px;
  margin-top: 6px;
}

.logout-btn {
  border-color: var(--accent);
  color: var(--accent);
}

.logout-btn:hover {
  background: var(--accent);
  color: var(--text);
}

#password-form {
  display: flex;
  flex-direction: column;
  gap: 10px;
  margin-top: 4px;
}
.checkbox-label {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 13px;
  color: var(--text-muted);
  cursor: pointer;
  margin-top: 2px;
}

.checkbox-label input[type="checkbox"] {
  width: auto;
  cursor: pointer;
}

/* ── MAÑANA ── */

.manana-container {
  display: flex;
  flex-direction: column;
  gap: 0;
}

.manana-header {
  padding: 12px 0 4px;
  position: sticky;
  top: 0;
  background: var(--bg);
  z-index: 10;
}

.add-task-form {
  display: flex;
  gap: 8px;
  padding: 8px 0 4px;
}

.add-task-form input {
  flex: 1;
  background: transparent;
}

.add-task-form button {
  width: auto;
  padding: 10px 14px;
  border-color: var(--accent);
  color: var(--text);
  flex-shrink: 0;
}

.add-task-form button:hover {
  background: transparent;
  color: var(--text);
}