/* === THEME VARIABLES === */
:root {
  --bg: #fdf8f2;
  --bg2: #f5ede2;
  --card: #ffffff;
  --card-border: rgba(180,140,110,0.12);
  --shadow: 0 2px 20px rgba(140,90,60,0.07);
  --text: #3d3530;
  --text2: #9c8880;
  --accent: #c49a8a;
  --accent-light: #f0e4de;
  --nav-bg: rgba(255,252,249,0.98);
  --font: "Courier Prime", "Courier New", monospace;
}
[data-theme="night"] {
  --bg: #1e1710; --bg2: #2a221a; --card: #2a221a;
  --card-border: rgba(200,160,120,0.1); --shadow: 0 2px 20px rgba(0,0,0,0.3);
  --text: #f5ede6; --text2: #a09080; --accent: #c49a8a; --accent-light: #3a2e26;
  --nav-bg: rgba(30,23,16,0.96);
}
[data-theme="blush"] {
  --bg: #fef2f0; --bg2: #fde8e5; --card: #fff5f4;
  --card-border: rgba(200,120,100,0.1); --shadow: 0 2px 20px rgba(180,90,70,0.07);
  --text: #3d2a28; --text2: #a07870; --accent: #d4948a; --accent-light: #fde8e5;
  --nav-bg: rgba(255,251,250,0.98);
}
[data-font="serif"] { --font: "Noto Serif SC", "Georgia", serif; }

/* === RESET & BASE === */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html, body {
  height: 100%; overflow: hidden;
  background: var(--bg); color: var(--text);
  font-family: var(--font);
  -webkit-font-smoothing: antialiased;
  transition: background .3s, color .3s;
}

/* === APP LAYOUT === */
#app {
  display: flex; flex-direction: column;
  height: 100vh; height: 100dvh;
  overflow: hidden;
}

/* === TAB CONTENT === */
.tab-content {
  display: none; flex: 1; overflow-y: auto;
  -webkit-overflow-scrolling: touch;
  padding: 0 0 12px;
}
.tab-content.active { display: block; }

/* === BOTTOM NAV === */
#bottom-nav {
  flex-shrink: 0;
  display: flex; align-items: center; justify-content: space-around;
  background: var(--nav-bg);
  backdrop-filter: blur(14px); -webkit-backdrop-filter: blur(14px);
  border-top: 1.5px solid var(--card-border);
  padding-top: 8px;
  padding-bottom: max(env(safe-area-inset-bottom, 0px), 14px);
  z-index: 100;
}
.nav-btn {
  display: flex; flex-direction: column; align-items: center; gap: 2px;
  background: none; border: none; cursor: pointer;
  color: var(--text2); padding: 4px 8px;
  transition: color .2s; min-width: 48px;
}
.nav-btn svg { width: 22px; height: 22px; }
.nav-btn span { font-size: 10px; font-family: var(--font); letter-spacing: .04em; }
.nav-btn.active { color: var(--accent); }
.home-nav-btn {
  background: var(--accent); border-radius: 50%;
  width: 48px; height: 48px; padding: 0; border: none;
  margin-top: -12px; flex-shrink: 0;
  box-shadow: 0 3px 14px rgba(196,154,138,0.45);
  color: #fff; cursor: pointer;
  display: flex; flex-direction: row;
  justify-content: center; align-items: center; gap: 0;
  transition: transform .15s;
}
.home-nav-btn svg { width: 22px; height: 22px; display: block; flex-shrink: 0; }
.home-nav-btn:active { transform: scale(.94); }
.home-nav-btn.active { color: #fff; }

/* === CARDS === */
.card {
  background: var(--card);
  border: 1px solid var(--card-border);
  box-shadow: var(--shadow);
  border-radius: 16px;
  margin: 16px 16px 0;
  padding: 16px 18px;
  transition: background .3s, border-color .3s;
}
.card-label {
  font-size: 10px; letter-spacing: .12em; color: var(--text2);
  margin-bottom: 12px;
  display: flex; align-items: center; gap: 5px;
}
.letter-icon { width: 13px; height: 13px; opacity: .7; flex-shrink: 0; }

/* === HOME HEADER === */
.home-header {
  padding: 52px 20px 8px;
  background: var(--bg);
}
.welcome-label {
  font-size: 10px; letter-spacing: .14em; color: var(--text2);
  margin-bottom: 10px;
}
.header-main { display: flex; justify-content: space-between; align-items: flex-start; }
.couple-name { font-size: 28px; font-weight: 600; color: var(--text); line-height: 1.1; }
.amp { color: var(--accent); }
.since-line { font-size: 11px; letter-spacing: .08em; color: var(--text2); margin-top: 4px; }
.header-right { text-align: right; }
.days-big { font-size: 56px; font-weight: 700; color: var(--accent); line-height: 1; }
.days-label { font-size: 11px; letter-spacing: .1em; color: var(--text2); }

/* === LETTERS CARD === */
.letters-card { position: relative; }
.letter-loading { color: var(--text2); font-size: 13px; }
.letter-content { font-size: 14px; line-height: 1.7; color: var(--text); white-space: pre-wrap; }
.letter-date { font-size: 10px; color: var(--text2); margin-top: 10px; letter-spacing: .06em; }
.letter-empty { color: var(--text2); font-size: 13px; font-style: italic; }

/* === HEALTH CARD === */
.health-card { padding: 12px 18px; }
.health-row { display: flex; align-items: center; gap: 8px; }
.health-icon { font-size: 14px; color: var(--accent); }
.health-text { font-size: 13px; color: var(--text2); }
.health-age { font-size: 10px; color: var(--text2); opacity: .7; margin-left: 4px; }

/* === COUNTDOWNS === */
.cd-item { padding: 10px 0; border-bottom: 1px solid var(--card-border); }
.cd-item:last-child { border-bottom: none; padding-bottom: 0; }
.cd-main { display: flex; justify-content: space-between; align-items: baseline; }
.cd-name { font-size: 15px; color: var(--text); }
.cd-days { font-size: 22px; font-weight: 700; color: var(--accent); }
.cd-sub { font-size: 10px; color: var(--text2); letter-spacing: .07em; margin-top: 2px; }

/* === TAB HEADER === */
.tab-header { padding: 52px 20px 8px; }
.tab-title { font-size: 26px; font-weight: 600; color: var(--text); }

/* === NAV CARDS === */
.nav-card {
  display: flex; align-items: center; justify-content: space-between;
  text-decoration: none; color: inherit;
}
.nav-title { font-size: 13px; letter-spacing: .1em; color: var(--text); margin-bottom: 2px; }
.nav-sub { font-size: 12px; color: var(--text2); }
.nav-arrow { font-size: 16px; color: var(--text2); }

/* === MEMORY LAYER LIST === */
.memory-layer-item {
  display: flex; align-items: center; justify-content: space-between;
  background: var(--card); border: 1px solid var(--card-border);
  border-radius: 14px; margin: 13px 16px 0;
  padding: 16px 18px; cursor: pointer;
  box-shadow: var(--shadow);
  transition: background .15s;
}
.memory-layer-item:active { background: var(--accent-light); }
.memory-layer-name { font-size: 13px; letter-spacing: .1em; color: var(--text); }
.memory-layer-desc { font-size: 11px; color: var(--text2); margin-top: 2px; }
.memory-layer-arrow { font-size: 14px; color: var(--text2); }

/* === SETTINGS === */
.settings-group { margin: 16px 16px 0; }
.settings-group-label {
  font-size: 10px; letter-spacing: .12em; color: var(--text2);
  margin-bottom: 8px; padding-left: 2px;
}
.theme-grid { display: flex; gap: 10px; }
.theme-card {
  flex: 1; background: var(--card); border: 1.5px solid var(--card-border);
  border-radius: 14px; padding: 12px 8px;
  display: flex; flex-direction: column; align-items: center; gap: 8px;
  cursor: pointer; color: var(--text); font-family: var(--font); font-size: 12px;
  transition: border-color .2s, box-shadow .2s;
}
.theme-card.active { border-color: var(--accent); box-shadow: 0 0 0 2px var(--accent-light); }
.theme-swatch {
  width: 36px; height: 36px; border-radius: 50%;
}
.warm-swatch { background: linear-gradient(135deg, #fdf8f2, #e8c9b8); }
.night-swatch { background: linear-gradient(135deg, #2a221a, #c49a8a); }
.blush-swatch { background: linear-gradient(135deg, #fef2f0, #d4948a); }

.font-row { display: flex; gap: 10px; }
.font-btn {
  flex: 1; background: var(--card); border: 1.5px solid var(--card-border);
  border-radius: 14px; padding: 12px 8px; cursor: pointer;
  color: var(--text); font-family: var(--font); font-size: 13px;
  transition: border-color .2s;
}
.font-btn.active { border-color: var(--accent); }

/* === WAKEUP CONTROL === */
.wakeup-card { padding: 16px 18px; }
.wakeup-section-label {
  font-size: 10px; letter-spacing: .1em; color: var(--text2); margin-bottom: 10px;
}
.wakeup-row { margin-bottom: 12px; }
.wakeup-label { font-size: 12px; color: var(--text2); display: block; margin-bottom: 4px; }
.wakeup-slider-wrap { display: flex; align-items: center; gap: 10px; }
.wakeup-slider {
  flex: 1; -webkit-appearance: none; appearance: none;
  height: 4px; border-radius: 2px; background: var(--accent-light); outline: none;
}
.wakeup-slider::-webkit-slider-thumb {
  -webkit-appearance: none; width: 18px; height: 18px;
  border-radius: 50%; background: var(--accent); cursor: pointer;
  box-shadow: 0 1px 6px rgba(0,0,0,0.15);
}
.wakeup-slider::-moz-range-thumb {
  width: 18px; height: 18px; border-radius: 50%; background: var(--accent);
  border: none; cursor: pointer;
}
.wakeup-pct { font-size: 13px; color: var(--accent); width: 36px; text-align: right; font-weight: 600; }
.wakeup-divider { height: 1px; background: var(--card-border); margin: 14px 0; }
.wakeup-save-btn {
  width: 100%; margin-top: 14px; padding: 12px;
  background: var(--accent); color: #fff; border: none;
  border-radius: 12px; font-family: var(--font); font-size: 14px; cursor: pointer;
  transition: opacity .2s;
}
.wakeup-save-btn:active { opacity: .8; }
.wakeup-save-btn:disabled { opacity: .6; }
.wakeup-status { text-align: center; font-size: 12px; color: var(--text2); margin-top: 8px; height: 16px; }

/* === LAYER PANEL === */
#layer-panel {
  position: fixed; bottom: 0; left: 0; right: 0;
  height: 80vh; background: var(--bg); z-index: 300;
  border-radius: 20px 20px 0 0;
  box-shadow: 0 -4px 30px rgba(0,0,0,0.12);
  transform: translateY(100%); transition: transform .3s cubic-bezier(.4,0,.2,1);
  display: flex; flex-direction: column;
}
#layer-panel.open { transform: translateY(0); }
.panel-header {
  display: flex; align-items: center; justify-content: space-between;
  padding: 18px 20px 12px;
  border-bottom: 1px solid var(--card-border);
  font-size: 12px; letter-spacing: .1em; color: var(--text2);
  flex-shrink: 0;
}
.panel-actions { display: flex; gap: 10px; align-items: center; }
#panel-body { flex: 1; overflow-y: auto; padding: 0 20px 20px; }
.panel-item {
  padding: 14px 0; border-bottom: 1px solid var(--card-border); cursor: pointer;
}
.panel-item:last-child { border-bottom: none; }
.pi-date { font-size: 10px; color: var(--text2); letter-spacing: .06em; margin-bottom: 3px; }
.pi-title { font-size: 15px; color: var(--text); margin-bottom: 2px; }
.pi-body { font-size: 13px; color: var(--text2); display: -webkit-box; -webkit-line-clamp: 2; -webkit-box-orient: vertical; overflow: hidden; }
.item-detail { padding-top: 16px; }
.item-detail-date { font-size: 10px; color: var(--text2); letter-spacing: .06em; margin-bottom: 6px; }
.item-detail-title { font-size: 18px; color: var(--text); margin-bottom: 12px; }
.item-detail-body { font-size: 14px; line-height: 1.75; color: var(--text); white-space: pre-wrap; }
.item-detail-actions { display: flex; gap: 12px; margin-top: 20px; flex-wrap: wrap; }
.status-text { padding: 20px 0; color: var(--text2); font-size: 13px; }

/* === BUTTONS === */
.action-btn {
  background: var(--accent-light); color: var(--accent);
  border: none; border-radius: 8px; padding: 6px 12px;
  font-size: 12px; font-family: var(--font); cursor: pointer;
}
.back-link {
  background: none; border: none; color: var(--text2);
  font-size: 13px; font-family: var(--font); cursor: pointer; padding: 0;
}
.danger-link { color: #e07070; }
.icon-close {
  background: none; border: none; font-size: 16px;
  color: var(--text2); cursor: pointer; padding: 2px 4px;
}

/* === WRITE MODAL === */
.modal {
  position: fixed; inset: 0; z-index: 400;
  background: rgba(0,0,0,0.45);
  display: flex; align-items: flex-end;
}
.modal.hidden { display: none; }
.modal-card {
  background: var(--bg); width: 100%;
  border-radius: 20px 20px 0 0;
  padding: 20px;
  max-height: 85vh; overflow-y: auto;
  padding-bottom: max(env(safe-area-inset-bottom,0px),20px);
}
.modal-header {
  display: flex; justify-content: space-between; align-items: center;
  margin-bottom: 16px; font-size: 12px; letter-spacing: .1em; color: var(--text2);
}
.modal-footer { margin-top: 16px; }
.form-group { margin-bottom: 14px; }
.form-label { display: block; font-size: 11px; letter-spacing: .08em; color: var(--text2); margin-bottom: 6px; }
.form-input, .form-textarea, select.form-input {
  width: 100%; background: var(--bg2); border: 1px solid var(--card-border);
  border-radius: 10px; padding: 10px 12px; color: var(--text);
  font-family: var(--font); font-size: 14px; outline: none;
}
.form-textarea { resize: vertical; min-height: 100px; }
.submit-btn {
  width: 100%; padding: 13px; background: var(--accent); color: #fff;
  border: none; border-radius: 12px; font-family: var(--font);
  font-size: 15px; cursor: pointer;
}
.submit-btn:disabled { opacity: .65; }

/* === OVERLAY === */
#overlay {
  position: fixed; inset: 0; z-index: 200;
  background: rgba(0,0,0,0.3);
  backdrop-filter: blur(2px);
}
#overlay.hidden { display: none; }

/* === TOAST === */
#toast {
  position: fixed; bottom: 90px; left: 50%; transform: translateX(-50%);
  background: var(--text); color: var(--bg);
  padding: 9px 18px; border-radius: 20px; font-size: 13px;
  opacity: 0; transition: opacity .2s; z-index: 500; white-space: nowrap;
  pointer-events: none;
}
#toast.show { opacity: 1; }

.hidden { display: none !important; }