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

:root {
  --color-pomodoro: #e24726;
  --color-short:    #30823e;
  --color-long:     #295ea7;
  --color-bg:       #f1aa1a;
  --color-card:     rgba(255,255,255,.15);
  --color-text:     #fff;
  --radius:         8px;
  --transition:     .35s ease;

  /* Kromatic colors */
  --color-cyan:       #55c4f9;
  --color-blue:       #295ea7;
  --color-pink:       #f20085;
  --color-purple:     #9a115d;
  --color-red:        #e24726;
  --color-yellow:     #f1aa1a;
  --color-green:      #56c740;
  --color-dark-green: #30823e;

}

html {
  font-family: 'Segoe UI', Arial, sans-serif;
  font-size: 16px;
}

body {
  min-height: 100vh;
  background-color: var(--color-bg);
  color: var(--color-text);
  transition: background-color var(--transition);
  display: flex;
  flex-direction: column;
  align-items: center;
}

/* ── Mode colours ─────────────────────────────────────────────────── */
body.mode-pomodoro { --color-bg: var(--color-pomodoro); }
body.mode-short    { --color-bg: var(--color-short); }
body.mode-long     { --color-bg: var(--color-long); }

/* ── Header ───────────────────────────────────────────────────────── */
.header {
  width: 100%;
  max-width: 620px;
  padding: 20px 24px 0;
  display: flex;
  align-items: center;
  justify-content: center;
}

.logo {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: .5px;
}

/* ── Main container ───────────────────────────────────────────────── */
.container {
  width: 100%;
  max-width: 620px;
  padding: 24px 16px 40px;
  display: flex;
  flex-direction: column;
  gap: 20px;
}

/* ── Timer card ───────────────────────────────────────────────────── */
.timer-card {
  background: var(--color-card);
  border-radius: var(--radius);
  padding: 28px 20px 36px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 24px;
}

/* ── Mode tabs ────────────────────────────────────────────────────── */
.mode-tabs {
  display: flex;
  gap: 4px;
}

.tab {
  background: transparent;
  border: none;
  color: rgba(255,255,255,.75);
  font-size: .9rem;
  font-weight: 600;
  padding: 6px 14px;
  border-radius: var(--radius);
  cursor: pointer;
  transition: background var(--transition), color var(--transition);
}

.tab:hover,
.tab.active {
  background: rgba(255,255,255,.25);
  color: #fff;
}

/* ── Timer display ────────────────────────────────────────────────── */
.timer-display {
  font-size: 7rem;
  font-weight: 700;
  line-height: 1;
  letter-spacing: -2px;
  user-select: none;
}

@media (max-width: 480px) {
  .timer-display { font-size: 5.5rem; }
}

/* ── Controls ─────────────────────────────────────────────────────── */
.controls {
  display: flex;
  align-items: center;
  gap: 16px;
}

.btn-start {
  background: #fff;
  color: var(--color-bg);
  border: none;
  border-radius: var(--radius);
  font-size: 1.2rem;
  font-weight: 700;
  padding: 16px 56px;
  letter-spacing: 3px;
  cursor: pointer;
  box-shadow: 0 6px 0 rgba(0,0,0,.2);
  transition: transform .1s, box-shadow .1s, color var(--transition);
}

.btn-start:active {
  transform: translateY(3px);
  box-shadow: 0 3px 0 rgba(0,0,0,.2);
}

.btn-reset {
  background: transparent;
  border: none;
  color: rgba(255,255,255,.8);
  font-size: 1.6rem;
  cursor: pointer;
  padding: 8px;
  border-radius: 50%;
  line-height: 1;
  transition: background var(--transition), color var(--transition);
}

.btn-reset:hover {
  background: rgba(255,255,255,.2);
  color: #fff;
}

/* ── Session info ─────────────────────────────────────────────────── */
.session-info {
  text-align: center;
  font-size: .9rem;
  opacity: .85;
  border-top: 1px solid rgba(255,255,255,.3);
  padding-top: 14px;
}

.session-count {
  font-weight: 700;
  margin-left: 6px;
}

/* ── Tasks section ────────────────────────────────────────────────── */
.tasks-section {
  background: rgba(0,0,0,.1);
  border-radius: var(--radius);
  padding: 20px;
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.tasks-title {
  font-size: 1rem;
  font-weight: 700;
  opacity: .85;
  text-transform: uppercase;
  letter-spacing: 1px;
  border-bottom: 1px solid rgba(255,255,255,.25);
  padding-bottom: 8px;
}

/* ── Task list ────────────────────────────────────────────────────── */
.task-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.task-item {
  display: flex;
  align-items: center;
  gap: 10px;
  background: rgba(255,255,255,.15);
  border-radius: var(--radius);
  padding: 10px 12px;
  font-size: .95rem;
  animation: slideIn .2s ease;
}

@keyframes slideIn {
  from { opacity: 0; transform: translateY(-6px); }
  to   { opacity: 1; transform: translateY(0); }
}

.task-item.done .task-text {
  text-decoration: line-through;
  opacity: .55;
}

.task-checkbox {
  width: 18px;
  height: 18px;
  flex-shrink: 0;
  accent-color: #fff;
  cursor: pointer;
}

.task-text {
  flex: 1;
  word-break: break-word;
}

.task-delete {
  background: transparent;
  border: none;
  color: rgba(255,255,255,.6);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 2px 6px;
  border-radius: 4px;
  line-height: 1;
  flex-shrink: 0;
  transition: background .2s, color .2s;
}

.task-delete:hover {
  background: rgba(255,255,255,.2);
  color: #fff;
}

/* ── Task form ────────────────────────────────────────────────────── */
.task-form {
  display: flex;
  gap: 8px;
}

.task-input {
  flex: 1;
  background: rgba(255,255,255,.2);
  border: none;
  border-radius: var(--radius);
  color: #fff;
  font-size: .95rem;
  padding: 10px 14px;
  outline: none;
  transition: background .2s;
}

.task-input::placeholder { color: rgba(255,255,255,.6); }

.task-input:focus { background: rgba(255,255,255,.3); }

.btn-add-task {
  background: rgba(255,255,255,.25);
  border: none;
  border-radius: var(--radius);
  color: #fff;
  font-size: .9rem;
  font-weight: 600;
  padding: 10px 18px;
  cursor: pointer;
  white-space: nowrap;
  transition: background .2s;
}

.btn-add-task:hover { background: rgba(255,255,255,.35); }

/* ── Notification banner ──────────────────────────────────────────── */
.notification-banner {
  position: fixed;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  background: rgba(0,0,0,.75);
  color: #fff;
  padding: 12px 28px;
  border-radius: 40px;
  font-size: .95rem;
  font-weight: 600;
  letter-spacing: .3px;
  backdrop-filter: blur(6px);
  animation: fadeUp .3s ease;
  z-index: 999;
}

.notification-banner[hidden] { display: none; }

@keyframes fadeUp {
  from { opacity: 0; transform: translateX(-50%) translateY(12px); }
  to   { opacity: 1; transform: translateX(-50%) translateY(0); }
}