/*
  Did I Move?
  Copyright (C) 2026 Maxim Tam

  This program is free software: you can redistribute it and/or modify
  it under the terms of the GNU General Public License as published by
  the Free Software Foundation, either version 3 of the License, or
  (at your option) any later version.

  This program is distributed in the hope that it will be useful,
  but WITHOUT ANY WARRANTY; without even the implied warranty of
  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  GNU General Public License for more details.

  You should have received a copy of the GNU General Public License
  along with this program. If not, see <https://www.gnu.org/licenses/>.
*/

:root {
  --bg: #f5f1e8;
  --text: #222;
  --text-muted: #4a4640;
  --text-faint: #6e6a62;
  --text-faintest: #948f84;
  --surface: #fffdf6;
  --surface-2: #f0ebdd;
  --border: #d6cfbc;
  --border-light: #e8e1cf;
  --btn-bg: #222;
  --btn-bg-hover: #444;
  --shadow: rgba(60, 50, 25, 0.1);
  --danger: #c43d2c;
  --accent: #2e7d4f;
  --accent-soft: #cfe6d6;
  --accent-faint: #e6f1e9;
  --rec: #7a6bb5;
  --rec-soft: #ded8f0;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --safe-left: env(safe-area-inset-left, 0px);
  --safe-right: env(safe-area-inset-right, 0px);
  --nav-height: 0px;
  color-scheme: light;
}
body.dark {
  color-scheme: dark;
  --bg: #000;
  --text: #e0e0e0;
  --text-muted: #aaa;
  --text-faint: #888;
  --text-faintest: #666;
  --surface: #111;
  --surface-2: #1a1a1a;
  --border: #333;
  --border-light: #222;
  --btn-bg: #e0e0e0;
  --btn-bg-hover: #ccc;
  --shadow: rgba(0, 0, 0, 0.5);
  --danger: #ff5a4d;
  --accent: #5cc48a;
  --accent-soft: #1f4a30;
  --accent-faint: #132a1c;
  --rec: #a394e6;
  --rec-soft: #2c2547;
}

* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  -webkit-tap-highlight-color: transparent;
}
body {
  font-family:
    -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background: var(--bg);
  color: var(--text);
  padding: calc(20px + var(--safe-top)) calc(20px + var(--safe-right)) calc(20px + var(--safe-bottom)) calc(20px + var(--safe-left));
  max-width: 760px;
  margin: 0 auto;
  line-height: 1.45;
  -webkit-text-size-adjust: 100%;
  overscroll-behavior-y: none;
}
h2 {
  margin: 28px 0 12px;
  font-size: 1.1rem;
  color: var(--text-muted);
}
h3 {
  font-size: 1rem;
  margin: 24px 0 8px;
}
a {
  color: inherit;
}
button {
  font: inherit;
  cursor: pointer;
  background: none;
  border: 1px solid var(--border);
  color: var(--text-faint);
  border-radius: 8px;
  padding: 8px 14px;
  min-height: 40px;
}
button {
  touch-action: manipulation;
  user-select: none;
  -webkit-user-select: none;
}
button:active {
  transform: scale(0.97);
}
@media (hover: hover) {
  button:hover {
    color: var(--text);
    border-color: var(--text-faint);
  }
}
button.primary {
  background: var(--btn-bg);
  color: var(--bg);
  border-color: var(--btn-bg);
  font-weight: 600;
}
@media (hover: hover) {
  button.primary:hover {
    background: var(--btn-bg-hover);
    border-color: var(--btn-bg-hover);
    color: var(--bg);
  }
}
button.primary:active {
  background: var(--btn-bg-hover);
  border-color: var(--btn-bg-hover);
  color: var(--bg);
}
button.big {
  font-size: 1.1rem;
  padding: 14px 28px;
  min-height: 52px;
  border-radius: 12px;
}
.hint {
  font-size: 0.85rem;
  color: var(--text-faint);
  margin: 8px 0;
}

/* Header */
.header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 12px;
  margin-bottom: 20px;
  flex-wrap: wrap;
}
.header h1 {
  font-size: 1.6rem;
}
.header h1 a {
  text-decoration: none;
}
.nav,
.header-tools {
  display: flex;
  gap: 6px;
  flex-wrap: wrap;
}
.nav {
  margin-left: auto;
}
.nav button,
.header-tools button {
  font-size: 0.875rem;
  padding: 8px 12px;
  min-height: 36px;
  border-radius: 6px;
}
.nav button.active {
  color: var(--text);
  border-color: var(--text);
  font-weight: 600;
}
.btn-more {
  display: none;
  width: 40px;
  min-height: 40px;
  padding: 0;
  font-size: 1.3rem;
  line-height: 1;
}
body.fullscreen .header h1,
body.fullscreen #btn-dark-mode,
body.fullscreen #btn-export,
body.fullscreen #btn-import,
body.fullscreen footer {
  display: none;
}
body.in-session #btn-export,
body.in-session #btn-import {
  display: none;
}
body.fullscreen .nav {
  display: none;
}

/* Today card */
.today-card {
  background: var(--surface);
  border-radius: 14px;
  padding: 20px;
  box-shadow: 0 1px 3px var(--shadow);
  border-left: 6px solid var(--danger);
}
.today-card.is-done {
  border-left-color: var(--accent);
}
.today-status {
  font-size: 1.5rem;
  font-weight: 700;
}
.today-card.is-done .today-status {
  color: var(--accent);
}
.today-streak {
  color: var(--text-faint);
  margin-top: 2px;
}
.today-plan-title {
  margin: 18px 0 8px;
  display: flex;
  align-items: baseline;
  gap: 10px;
  flex-wrap: wrap;
}
.today-minutes {
  font-size: 0.85rem;
  font-weight: 400;
  color: var(--text-faintest);
}
.plan-list {
  list-style: none;
}
.plan-list li {
  display: grid;
  grid-template-columns: minmax(0, 1fr) auto;
  grid-template-rows: auto auto;
  column-gap: 12px;
  align-items: center;
  padding: 8px 0;
  border-bottom: 1px solid var(--border-light);
}
.plan-list li:last-child {
  border-bottom: none;
}
.plan-name {
  font-weight: 600;
  grid-column: 1;
  grid-row: 1;
}
.plan-level {
  font-size: 0.8rem;
  color: var(--text-faintest);
  grid-column: 1;
  grid-row: 2;
}
.plan-level:empty {
  display: none;
}
.plan-target {
  font-variant-numeric: tabular-nums;
  color: var(--text-muted);
  white-space: nowrap;
  text-align: right;
  grid-column: 2;
  grid-row: 1 / span 2;
}
.plan-list.small {
  font-size: 0.875rem;
}
.plan-list.small li {
  padding: 4px 0;
}
.today-actions {
  display: flex;
  gap: 10px;
  margin-top: 16px;
  flex-wrap: wrap;
}
.today-actions .primary {
  flex: 1 1 200px;
  font-size: 1.1rem;
  min-height: 52px;
  border-radius: 12px;
}
.today-manual {
  margin-top: 12px;
  font-size: 0.85rem;
  color: var(--text-faint);
}

/* Celebration */
.celebrate {
  position: relative;
  background: var(--accent-faint);
  border: 1px solid var(--accent-soft);
  border-radius: 12px;
  padding: 16px 44px 16px 16px;
  margin-bottom: 16px;
}
.celebrate-title {
  font-weight: 600;
  color: var(--accent);
}
.celebrate p {
  margin-top: 6px;
  font-size: 0.9rem;
}
.celebrate button {
  position: absolute;
  top: 4px;
  right: 4px;
  border: none;
  font-size: 1.3rem;
  min-height: 40px;
  width: 40px;
  padding: 0;
}

/* Heatmap */
.heatmap-wrap {
  display: flex;
  gap: 6px;
  align-items: stretch;
  overflow-x: auto;
  padding-bottom: 4px;
}
.heatmap-days {
  display: grid;
  grid-template-rows: repeat(7, 1fr);
  font-size: 0.65rem;
  color: var(--text-faintest);
  line-height: 1;
}
.heatmap-days span {
  display: flex;
  align-items: center;
}
.heatmap {
  display: grid;
  grid-auto-flow: column;
  grid-template-rows: repeat(7, 18px);
  grid-auto-columns: 18px;
  gap: 3px;
}
.cell {
  width: 18px;
  height: 18px;
  border-radius: 4px;
  background: var(--surface-2);
  border: 1px solid var(--border-light);
}
.cell.done {
  background: var(--accent);
  border-color: var(--accent);
}
.cell.done.short {
  background: var(--accent-soft);
  border-color: var(--accent-soft);
}
.cell.done.rec {
  background: var(--rec);
  border-color: var(--rec);
}
.cell.today {
  outline: 2px solid var(--text);
  outline-offset: 1px;
}
.cell.future {
  visibility: hidden;
}
.stats-row {
  display: flex;
  gap: 16px;
  font-size: 0.8rem;
  color: var(--text-faintest);
  margin-top: 8px;
}

/* Settings */
.settings {
  display: flex;
  gap: 16px;
  align-items: flex-end;
  flex-wrap: wrap;
  background: var(--surface);
  padding: 16px;
  border-radius: 12px;
  box-shadow: 0 1px 3px var(--shadow);
}
.settings label {
  display: flex;
  flex-direction: column;
  font-size: 0.875rem;
  color: var(--text-faint);
  gap: 4px;
}
.settings label.check {
  flex-direction: row;
  align-items: center;
  gap: 8px;
  min-height: 40px;
}
.settings input[type="time"],
.settings input[type="number"] {
  padding: 8px 10px;
  border: 1px solid var(--border);
  border-radius: 6px;
  font-size: 1rem;
  background: var(--surface);
  color: var(--text);
}
.settings input[type="number"] {
  width: 80px;
}
.rest-input {
  display: flex;
  align-items: center;
  gap: 6px;
}
.explainer p {
  margin: 0 0 12px;
  font-size: 0.95rem;
}

/* Session */
.session-top {
  margin-bottom: 14px;
}
.progress {
  height: 6px;
  background: var(--surface-2);
  border-radius: 3px;
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: var(--accent);
  transition: width 0.3s ease;
}
.session-meta {
  display: flex;
  justify-content: space-between;
  font-size: 0.8rem;
  color: var(--text-faintest);
  margin-top: 6px;
}
.step-card {
  background: var(--surface);
  border-radius: 14px;
  padding: 20px;
  box-shadow: 0 1px 3px var(--shadow);
  border-top: 6px solid var(--border);
}
.step-card.kind-main {
  border-top-color: var(--accent);
}
.step-card.kind-recovery {
  border-top-color: var(--rec);
}
.step-card.done-card {
  border-top-color: var(--accent);
}
.step-kind {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-faintest);
}
.step-name {
  margin: 4px 0 2px;
  font-size: 1.7rem;
  color: var(--text);
}
.step-target {
  color: var(--text-muted);
  font-variant-numeric: tabular-nums;
}
.step-image,
.level-image {
  display: block;
  width: 100%;
  height: auto;
  aspect-ratio: 3 / 2;
  border-radius: 10px;
  background: #fffdf6;
  border: 1px solid var(--border-light);
  object-fit: contain;
}
.step-image {
  margin: 14px 0 4px;
}
.level-image {
  margin: 8px 0 4px;
  max-width: 480px;
}
body.dark .step-image,
body.dark .level-image {
  filter: brightness(0.9);
}
.step-prev {
  font-size: 0.8rem;
  color: var(--text-faintest);
  margin-top: 4px;
}
.side-label {
  font-weight: 600;
  color: var(--accent);
  margin-bottom: 6px;
}

.timed-box,
.reps-box,
.rest-box,
.feedback-box {
  margin: 20px 0;
  text-align: center;
}
.ring {
  position: relative;
  width: 200px;
  height: 200px;
  margin: 0 auto 14px;
}
.ring svg {
  width: 100%;
  height: 100%;
  transform: rotate(-90deg);
}
.ring circle {
  fill: none;
  stroke-width: 6;
}
.ring-track {
  stroke: var(--surface-2);
}
.ring-fill {
  stroke: var(--accent);
  stroke-dasharray: 283;
  stroke-linecap: round;
  transition: stroke-dashoffset 0.2s linear;
}
.rest-box .ring-fill {
  stroke: var(--text-faintest);
}
.countdown {
  position: absolute;
  inset: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 3.2rem;
  font-weight: 700;
  font-variant-numeric: tabular-nums;
}
.timed-buttons {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}
.timed-buttons .big,
.reps-box .big {
  min-width: 200px;
}
.reps-stepper {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 18px;
  margin: 10px 0;
}
.reps-stepper button {
  width: 56px;
  height: 56px;
  border-radius: 50%;
  font-size: 1.6rem;
  padding: 0;
  line-height: 1;
}
.reps-count {
  font-size: 3.2rem;
  font-weight: 700;
  min-width: 80px;
  font-variant-numeric: tabular-nums;
}
.reps-hint {
  font-size: 0.8rem;
  color: var(--text-faintest);
  margin-bottom: 14px;
}
.rest-label {
  font-size: 0.75rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-faintest);
  margin-bottom: 8px;
}
.rest-next {
  color: var(--text-faint);
  margin-bottom: 12px;
}
.feedback-q {
  font-size: 1.1rem;
  margin-bottom: 14px;
}
.feedback-buttons {
  display: flex;
  gap: 10px;
  justify-content: center;
  flex-wrap: wrap;
}
.feedback-buttons button {
  min-height: 48px;
  padding: 10px 18px;
  flex: 1 1 120px;
  max-width: 180px;
}
.rest-box .big,
#btn-skip-rest {
  min-height: 48px;
}

.step-how {
  border-top: 1px solid var(--border-light);
  padding-top: 12px;
  margin-top: 8px;
}
.step-how summary,
.level summary {
  cursor: pointer;
  color: var(--text-faint);
  font-size: 0.9rem;
  min-height: 32px;
  display: flex;
  align-items: center;
}
.step-how p,
.level p {
  margin: 8px 0;
  font-size: 0.95rem;
}
.cues {
  margin: 8px 0 8px 20px;
  font-size: 0.9rem;
}
.cues li {
  margin: 3px 0;
}
.avoid {
  font-size: 0.875rem;
  color: var(--text-muted);
}
.step-footer {
  display: flex;
  justify-content: space-between;
  margin-top: 16px;
  font-size: 0.8rem;
}
.step-footer a {
  color: var(--text-faintest);
  padding: 12px 0;
  display: inline-flex;
  align-items: center;
  min-height: 44px;
}
.step-footer a:hover {
  color: var(--danger);
}

/* Guide */
.view-head {
  display: flex;
  justify-content: space-between;
  align-items: center;
}
.view-head h2 {
  margin: 0;
}
.family {
  background: var(--surface);
  border-radius: 12px;
  padding: 4px 16px 12px;
  margin-bottom: 14px;
  box-shadow: 0 1px 3px var(--shadow);
}
.family h3 {
  margin: 14px 0 6px;
  display: flex;
  gap: 10px;
  align-items: baseline;
  flex-wrap: wrap;
}
.family-meta {
  font-size: 0.8rem;
  font-weight: 400;
  color: var(--text-faintest);
}
.level {
  border-top: 1px solid var(--border-light);
  padding: 4px 0;
}
.level summary {
  gap: 10px;
  color: var(--text);
  flex-wrap: wrap;
}
.level-no {
  width: 22px;
  height: 22px;
  border-radius: 50%;
  border: 1px solid var(--border);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  color: var(--text-faint);
  flex-shrink: 0;
}
.level.current .level-no {
  background: var(--accent);
  border-color: var(--accent);
  color: #fff;
}
.level-name {
  font-weight: 600;
  flex: 1 1 auto;
}
.level-target {
  color: var(--text-muted);
  font-size: 0.875rem;
  font-variant-numeric: tabular-nums;
}
.level-badge {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  color: var(--accent);
}
.level button {
  font-size: 0.85rem;
  margin: 4px 0 8px;
}

/* Log */
.log-list {
  list-style: none;
}
.log-entry {
  background: var(--surface);
  border-radius: 12px;
  padding: 12px 16px;
  margin-bottom: 10px;
  box-shadow: 0 1px 3px var(--shadow);
}
.log-head {
  display: flex;
  gap: 12px;
  align-items: center;
  flex-wrap: wrap;
}
.log-date {
  font-variant-numeric: tabular-nums;
  color: var(--text-faint);
  font-size: 0.875rem;
}
.log-title {
  font-weight: 600;
  flex: 1 1 auto;
}
.log-dur {
  font-size: 0.8rem;
  color: var(--text-faintest);
}
.log-delete {
  border: none;
  font-size: 1.2rem;
  min-height: 36px;
  width: 36px;
  padding: 0;
}
.log-delete:hover {
  color: var(--danger);
}

/* Export / import dialog */
#data-dialog {
  border: none;
  border-radius: 12px;
  padding: 20px;
  width: min(560px, calc(100vw - 32px));
  background: var(--surface);
  color: var(--text);
  box-shadow: 0 8px 32px var(--shadow);
}
#data-dialog::backdrop {
  background: rgba(0, 0, 0, 0.5);
}
#data-dialog h2 {
  margin: 0 0 8px;
}
#data-dialog-hint {
  font-size: 0.875rem;
  color: var(--text-faint);
  margin-bottom: 12px;
}
#data-text {
  width: 100%;
  min-height: 140px;
  font-family: ui-monospace, SFMono-Regular, Menlo, monospace;
  font-size: 0.75rem;
  padding: 10px;
  border: 1px solid var(--border);
  border-radius: 8px;
  background: var(--bg);
  color: var(--text);
  resize: vertical;
  word-break: break-all;
}
.dialog-actions {
  display: flex;
  justify-content: flex-end;
  gap: 8px;
  margin-top: 12px;
}
.dialog-actions button {
  min-height: 44px;
}

footer {
  margin-top: 40px;
  padding-top: 16px;
  border-top: 1px solid var(--border-light);
  display: flex;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 8px;
  font-size: 0.8rem;
  color: var(--text-faintest);
}
footer a {
  color: var(--text-faint);
}

@media (max-width: 600px) {
  :root {
    --nav-height: 56px;
  }
  body {
    padding: calc(12px + var(--safe-top)) calc(16px + var(--safe-right)) calc(20px + var(--nav-height) + var(--safe-bottom)) calc(16px + var(--safe-left));
  }
  button {
    min-height: 44px;
  }

  /* Header: title on the left, "more" on the right, tools drop down. */
  .header {
    position: relative;
    flex-wrap: nowrap;
    margin-bottom: 16px;
  }
  .header h1 {
    font-size: 1.35rem;
    flex: 1 1 auto;
    min-width: 0;
  }
  .btn-more {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
  }
  .header-tools {
    display: none;
    position: absolute;
    top: calc(100% + 6px);
    right: 0;
    z-index: 20;
    flex-direction: column;
    gap: 0;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: 0 8px 24px var(--shadow);
    padding: 6px;
    min-width: 170px;
  }
  .header.tools-open .header-tools {
    display: flex;
  }
  .header-tools button {
    border: none;
    border-radius: 8px;
    text-align: left;
    min-height: 44px;
    font-size: 1rem;
    color: var(--text);
  }
  body.in-session #btn-export,
  body.in-session #btn-import {
    display: none;
  }

  /* Bottom tab bar. */
  .nav {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    z-index: 10;
    margin: 0;
    gap: 0;
    flex-wrap: nowrap;
    height: calc(var(--nav-height) + var(--safe-bottom));
    padding: 0 var(--safe-right) var(--safe-bottom) var(--safe-left);
    background: var(--surface);
    border-top: 1px solid var(--border-light);
  }
  .nav button {
    flex: 1 1 0;
    min-height: 0;
    height: 100%;
    border: none;
    border-radius: 0;
    font-size: 0.95rem;
    color: var(--text-faint);
    border-top: 2px solid transparent;
  }
  .nav button.active {
    color: var(--accent);
    border-top-color: var(--accent);
    background: none;
  }
  .nav button:active {
    transform: none;
    background: var(--surface-2);
  }
  body.fullscreen {
    padding-bottom: calc(20px + var(--safe-bottom));
  }

  /* Cards flush with the gutter, a bit tighter. */
  .today-card,
  .step-card {
    padding: 16px;
    border-radius: 12px;
  }
  .today-status {
    font-size: 1.3rem;
  }
  .today-actions {
    flex-direction: column;
  }
  .today-actions button,
  .today-actions .primary {
    flex: 0 0 auto;
    width: 100%;
    min-height: 52px;
  }
  .today-manual {
    line-height: 1.8;
  }

  /* Session: keep the progress bar in view, big full-width controls. */
  .session-top {
    position: sticky;
    top: 0;
    z-index: 5;
    background: var(--bg);
    padding: 6px 0 8px;
    margin: -6px 0 10px;
  }
  .step-name {
    font-size: 1.5rem;
  }
  .ring {
    width: 180px;
    height: 180px;
  }
  .countdown {
    font-size: 2.8rem;
  }
  .timed-buttons,
  .reps-box {
    display: flex;
    flex-direction: column;
    align-items: stretch;
  }
  .reps-stepper {
    align-self: center;
    gap: 28px;
  }
  .reps-stepper button {
    width: 64px;
    height: 64px;
  }
  .timed-buttons .big,
  .reps-box .big,
  .rest-box .big,
  #btn-skip-rest,
  #btn-switch-skip {
    width: 100%;
    min-height: 56px;
    font-size: 1.15rem;
  }
  .rest-box {
    display: flex;
    flex-direction: column;
    align-items: stretch;
  }
  .feedback-buttons {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 8px;
  }
  .feedback-buttons button {
    max-width: none;
    padding: 10px 6px;
    min-height: 52px;
  }
  .step-how summary {
    min-height: 44px;
  }

  /* Guide & log: the tab bar replaces the "back" button. */
  .view-head button {
    display: none;
  }
  .family {
    padding: 4px 14px 10px;
  }
  .level summary {
    min-height: 44px;
  }
  .level button {
    min-height: 40px;
  }
  .log-entry {
    padding: 12px 14px;
  }
  .log-delete {
    width: 44px;
    min-height: 44px;
  }

  /* Settings: full-width fields. */
  .settings {
    flex-direction: column;
    align-items: stretch;
    gap: 14px;
  }
  .settings input[type="time"] {
    width: 100%;
  }
  .settings input[type="number"] {
    width: 100px;
  }

  /* Export/import as a bottom sheet; 16px text so iOS doesn't zoom. */
  #data-dialog {
    width: 100%;
    max-width: none;
    margin: auto 0 0;
    border-radius: 16px 16px 0 0;
    padding: 20px 16px calc(16px + var(--safe-bottom));
    max-height: 85vh;
    overflow-y: auto;
  }
  #data-text {
    font-size: 1rem;
    min-height: 120px;
  }
  .dialog-actions {
    flex-direction: row-reverse;
  }
  .dialog-actions button {
    flex: 1 1 0;
    min-height: 48px;
  }
  .dialog-actions #btn-data-primary {
    background: var(--btn-bg);
    color: var(--bg);
    border-color: var(--btn-bg);
    font-weight: 600;
  }

  footer {
    flex-direction: column;
    gap: 4px;
    margin-top: 32px;
  }
}