:root {
  --bg: #f5f4f0;
  --surface: #ffffff;
  --border: #e8e6e0;
  --text: #1a1a1a;
  --text-muted: #9a9890;
  --accent: #2d6a4f;
  --accent-light: #e8f4ee;
  --danger: #c0392b;
  --danger-light: #fdf0ec;
  --warning: #e67e22;
  --warning-light: #fef5ec;
  --pill-r: 10px;
  --font: 'Helvetica Neue', Helvetica, Arial, sans-serif;
}

* { margin: 0; padding: 0; box-sizing: border-box; -webkit-tap-highlight-color: transparent; }

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  padding: 16px;
  max-width: 480px;
  margin: 0 auto;
}

.install-bar {
  display: none;
  align-items: center;
  justify-content: center;
  gap: 8px;
  width: 100vw;
  margin: 0 0 12px;
  margin-left: calc(50% - 50vw);
  padding: 8px 12px;
  background: rgba(45, 106, 79, 0.95);
  color: #ffffff;
  border-bottom: 1px solid rgba(255, 255, 255, 0.16);
  backdrop-filter: blur(8px);
  position: sticky;
  top: 0;
  z-index: 1000;
  box-sizing: border-box;
}

.install-bar__text {
  font-size: 0.8rem;
  line-height: 1.2;
  flex: 1;
}

.btn-install-floating {
  border: none;
  border-radius: 999px;
  background: #ffffff;
  color: var(--accent);
  padding: 6px 10px;
  font-size: 0.75rem;
  font-weight: 700;
  cursor: pointer;
  white-space: nowrap;
}

.install-bar__close {
  border: none;
  background: transparent;
  color: #ffffff;
  font-size: 1rem;
  line-height: 1;
  cursor: pointer;
  padding: 2px 4px;
  opacity: 0.9;
}

/* SCREENS */
.screen { display: none; }
.screen.active { display: block; }

/* TYPOGRAPHY */
.page-title {
  font-size: 1.4rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}

.page-sub {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 28px;
}

.section-label {
  font-size: 0.65rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
  margin: 20px 0 8px;
}

/* STEP INDICATOR */
.step-indicator {
  display: flex;
  gap: 6px;
  margin-bottom: 24px;
}

.step-dot {
  height: 3px;
  flex: 1;
  border-radius: 2px;
  background: var(--border);
  transition: background 0.2s;
}

.step-dot.done { background: var(--accent); }
.step-dot.active { background: var(--accent); opacity: 0.5; }

/* PERIOD TOGGLES */
.period-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 10px;
  margin-bottom: 32px;
}

.period-btn {
  border: 2px solid var(--border);
  border-radius: var(--pill-r);
  background: var(--surface);
  padding: 16px 8px;
  cursor: pointer;
  text-align: center;
  transition: all 0.15s;
  font-family: var(--font);
}

.period-btn .icon { font-size: 1.6rem; display: block; margin-bottom: 6px; }
.period-btn .label { font-size: 0.78rem; font-weight: 600; color: var(--text-muted); }

.period-btn.selected {
  border-color: var(--accent);
  background: var(--accent-light);
}

.period-btn.selected .label { color: var(--accent); }

/* MEDICINE LIST */
.medicine-list { margin-bottom: 16px; }

.medicine-item {
  background: var(--surface);
  border-radius: var(--pill-r);
  padding: 12px 14px;
  margin-bottom: 8px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  border: 1px solid var(--border);
}

.medicine-item-left { flex: 1; }
.medicine-item-name { font-size: 0.95rem; font-weight: 600; }
.medicine-item-meta { font-size: 0.72rem; color: var(--text-muted); margin-top: 2px; }

.delete-btn {
  background: none;
  border: none;
  color: var(--text-muted);
  font-size: 1.1rem;
  cursor: pointer;
  padding: 4px 8px;
  border-radius: 6px;
  transition: all 0.15s;
}

.delete-btn:hover { background: var(--danger-light); color: var(--danger); }

/* ADD MEDICINE FORM */
.add-form {
  background: var(--surface);
  border-radius: var(--pill-r);
  padding: 16px;
  border: 1px solid var(--border);
  margin-bottom: 24px;
}

.form-row {
  display: flex;
  gap: 10px;
  margin-bottom: 12px;
}

.form-group {
  flex: 1;
  display: flex;
  flex-direction: column;
  gap: 5px;
  margin-bottom: 12px;
}

.form-group:last-child { margin-bottom: 0; }

.form-group.invalid label {
  color: var(--danger);
}

.form-group.invalid input,
.form-group.invalid .period-check,
.duration-days-input.invalid input,
.period-check.invalid {
  border-color: var(--danger);
  box-shadow: 0 0 0 1px rgba(192, 57, 43, 0.12);
}

.form-group.invalid .period-check {
  background: var(--danger-light);
  color: var(--danger);
}

.field-error-message {
  display: none;
  color: var(--danger);
  font-size: 0.74rem;
  margin-top: 2px;
}

.field-error-message.active {
  display: block;
}

label {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  color: var(--text-muted);
  font-weight: 600;
}

input[type="text"], input[type="number"] {
  border: 1.5px solid var(--border);
  border-radius: 8px;
  padding: 10px 12px;
  font-family: var(--font);
  font-size: 0.9rem;
  color: var(--text);
  background: var(--bg);
  outline: none;
  transition: border-color 0.15s;
  width: 100%;
}

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

/* PERIOD CHECKBOXES IN FORM */
.period-checks {
  display: flex;
  gap: 8px;
  flex-wrap: wrap;
}

.period-check {
  border: 1.5px solid var(--border);
  border-radius: 20px;
  padding: 6px 14px;
  font-size: 0.78rem;
  cursor: pointer;
  background: var(--bg);
  color: var(--text-muted);
  font-family: var(--font);
  font-weight: 500;
  transition: all 0.15s;
}

.period-check.selected {
  border-color: var(--accent);
  background: var(--accent-light);
  color: var(--accent);
}

/* DURATION */
.duration-row {
  display: flex;
  gap: 8px;
  align-items: center;
  flex-wrap: wrap;
}

.duration-toggle {
  border: 1.5px solid var(--border);
  border-radius: 20px;
  padding: 6px 14px;
  font-size: 0.78rem;
  cursor: pointer;
  background: var(--bg);
  color: var(--text-muted);
  font-family: var(--font);
  font-weight: 500;
  transition: all 0.15s;
}

.duration-toggle.selected {
  border-color: var(--accent);
  background: var(--accent-light);
  color: var(--accent);
}

.duration-days-input {
  display: none;
  align-items: center;
  gap: 6px;
}

.duration-days-input.visible { display: flex; }
.duration-days-input input { width: 60px; }
.duration-days-input span { font-size: 0.78rem; color: var(--text-muted); }

/* BUTTONS */
.btn {
  border: none;
  border-radius: 10px;
  padding: 13px 20px;
  font-family: var(--font);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.15s;
  width: 100%;
  display: block;
  text-align: center;
}

.btn-primary {
  background: var(--accent);
  color: white;
}

.btn-primary:disabled {
  background: var(--border);
  color: var(--text-muted);
  cursor: not-allowed;
}

.btn-secondary {
  background: var(--surface);
  color: var(--text);
  border: 1.5px solid var(--border);
  margin-top: 10px;
}

.btn-danger {
  background: var(--danger-light);
  color: var(--danger);
  border: 1.5px solid #f5c6bc;
  margin-top: 10px;
}

.btn-outline-accent {
  background: var(--accent-light);
  color: var(--accent);
  border: 1.5px solid var(--accent);
  margin-bottom: 16px;
}

.share-link-field {
  width: 100%;
  min-height: 86px;
  resize: vertical;
  border: 1.5px solid var(--border);
  border-radius: 8px;
  padding: 10px;
  font-family: var(--font);
  font-size: 0.78rem;
  line-height: 1.4;
  color: var(--text);
  background: var(--bg);
  margin-bottom: 14px;
}

.share-note {
  font-size: 0.72rem;
  color: var(--text-muted);
  line-height: 1.4;
  margin: -8px 0 16px;
}

/* HOME SCREEN */
.home-hero {
  text-align: center;
  padding: 60px 0 40px;
}

.home-icon { font-size: 3.5rem; margin-bottom: 16px; display: block; }

.home-hero h1 {
  font-size: 1.8rem;
  font-weight: 700;
  letter-spacing: -0.03em;
  margin-bottom: 8px;
}

.home-hero p {
  font-size: 0.88rem;
  color: var(--text-muted);
  line-height: 1.6;
  margin-bottom: 40px;
}

/* DASHBOARD TABS */
.date-line {
  text-align: right;
  font-size: 0.7rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.screen-note {
  font-size: 0.8rem;
  color: var(--text-muted);
  margin-bottom: 12px;
  line-height: 1.5;
}

.tabs {
  display: flex;
  gap: 6px;
  margin-bottom: 14px;
  background: #ece9e3;
  border-radius: 12px;
  padding: 4px;
}

.tab-btn {
  flex: 1;
  padding: 8px 0;
  border: none;
  border-radius: 8px;
  background: transparent;
  font-family: var(--font);
  font-size: 0.75rem;
  color: #888;
  cursor: pointer;
  transition: all 0.15s;
  font-weight: 500;
  line-height: 1.3;
}

.tab-btn .tab-icon { display: block; font-size: 1rem; margin-bottom: 1px; }
.tab-btn.active { background: #fff; color: var(--text); box-shadow: 0 1px 3px rgba(0,0,0,0.1); }

.tab-content { display: none; }
.tab-content.active { display: block; }

/* DASHBOARD CARDS */
.dash-card {
  background: var(--surface);
  border-radius: var(--pill-r);
  margin-bottom: 8px;
  padding: 12px 14px;
  border-left: 4px solid var(--accent);
  box-shadow: 0 1px 3px rgba(0,0,0,0.05);
  cursor: pointer;
  user-select: none;
  transition: opacity 0.2s, filter 0.2s;
}

.dash-card-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 8px;
}

.dash-card-name { font-size: 0.95rem; font-weight: 700; }

.dash-dose {
  font-size: 0.85rem;
  font-weight: 700;
  background: #f0f0f0;
  border-radius: 16px;
  padding: 3px 12px;
  flex-shrink: 0;
}

.dash-duration {
  font-size: 0.65rem;
  border-radius: 16px;
  padding: 2px 8px;
  margin-top: 4px;
  display: inline-block;
  border: 1px solid var(--border);
  color: var(--text-muted);
  background: var(--bg);
}

.dash-duration.limited {
  background: var(--warning-light);
  color: var(--warning);
  border-color: #f8d5a3;
}

.dash-duration-end {
  font-size: 0.65rem;
  border-radius: 16px;
  padding: 2px 8px;
  margin-top: 4px;
  margin-left: 8px;
  display: inline-block;
  border: 1px solid var(--border);
  color: var(--text-muted);
  background: var(--bg);
}

.dash-duration-end.limited-end {
  background: var(--warning-light);
  color: var(--warning);
  border-color: #f8d5a3;
}

.dash-note {
  font-size: 0.72rem;
  color: #666;
  margin-top: 6px;
  padding-top: 6px;
  border-top: 1px solid var(--border);
  line-height: 1.4;
}

.dash-card.taken {
  opacity: 0.4;
  filter: grayscale(1);
}

.dash-card.taken .dash-card-name::after {
  content: ' ✓';
  color: #888;
  font-size: 0.8rem;
}

/* EMPTY STATE */
.empty-period {
  text-align: center;
  padding: 40px 0;
  color: var(--text-muted);
  font-size: 0.85rem;
}

/* CONFIRM DIALOG */
.overlay {
  display: none;
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.4);
  z-index: 100;
  align-items: flex-end;
  justify-content: center;
}

.overlay.active { display: flex; }

.dialog {
  background: var(--surface);
  border-radius: 16px 16px 0 0;
  padding: 24px 20px 32px;
  width: 100%;
  max-width: 480px;
}

.dialog h3 { font-size: 1.1rem; margin-bottom: 8px; }
.dialog p { font-size: 0.85rem; color: var(--text-muted); margin-bottom: 20px; line-height: 1.5; }

/* DASHBOARD FOOTER */
.dash-footer {
  margin-top: 24px;
  padding-top: 16px;
  border-top: 1px solid var(--border);
}

/* FLOATING INSTALL BAR */
.install-bar {
  position: fixed;
  top: 8px;
  left: 50%;
  transform: translateX(-50%);
  width: calc(100% - 24px);
  max-width: 320px;
  z-index: 1000;
  display: none;
  justify-content: center;
}

.btn-install-floating {
  background: rgba(255, 255, 255, 0.94);
  color: var(--accent);
  border: 1px solid rgba(45, 106, 79, 0.18);
  border-radius: 999px;
  padding: 8px 14px;
  font-family: var(--font);
  font-size: 0.8rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s;
  box-shadow: 0 2px 8px rgba(0,0,0,0.08);
  backdrop-filter: blur(6px);
}

.btn-install-floating:hover {
  background: white;
  box-shadow: 0 3px 10px rgba(0,0,0,0.12);
}

body.install-bar-visible {
  padding-top: 42px;
}