/* 004 水分補給リマインダー — 黒とシアン / デジタルHUD */
:root {
  --bg: #03070b;
  --bg-2: #061018;
  --cyan: #38e6ff;
  --cyan-soft: #6ff0ff;
  --cyan-dim: #1c6c7d;
  --line: rgba(56, 230, 255, 0.22);
  --line-strong: rgba(56, 230, 255, 0.5);
  --panel: rgba(8, 22, 30, 0.62);
  --panel-edge: rgba(56, 230, 255, 0.28);
  --text: #d6f6ff;
  --text-dim: #6f97a6;
  --warn: #ffcb57;
  --glow: 0 0 18px rgba(56, 230, 255, 0.45);
  --font-num: "Segoe UI", "SF Mono", "Consolas", ui-monospace, monospace;
  --font-ui: "Segoe UI", "Hiragino Kaku Gothic ProN", "Noto Sans JP", system-ui, sans-serif;
}

* { box-sizing: border-box; }

html, body { margin: 0; padding: 0; }

body {
  font-family: var(--font-ui);
  color: var(--text);
  background:
    radial-gradient(900px 600px at 50% -8%, rgba(56, 230, 255, 0.10), transparent 60%),
    linear-gradient(180deg, var(--bg-2), var(--bg) 60%);
  min-height: 100vh;
  position: relative;
  overflow-x: hidden;
  -webkit-tap-highlight-color: transparent;
}

/* background image layer with CSS fallback already on body */
.bg-grid {
  position: fixed;
  inset: 0;
  z-index: -2;
  background-image: url("assets/background.png");
  background-size: cover;
  background-position: center;
  opacity: 0.35;
  pointer-events: none;
}
.bg-grid::after {
  content: "";
  position: absolute;
  inset: 0;
  background:
    linear-gradient(transparent 95%, var(--line) 95%) 0 0 / 100% 42px,
    linear-gradient(90deg, transparent 95%, var(--line) 95%) 0 0 / 42px 100%;
  opacity: 0.4;
}
.scanline {
  position: fixed;
  inset: 0;
  z-index: -1;
  pointer-events: none;
  background: repeating-linear-gradient(0deg, rgba(0,0,0,0) 0 3px, rgba(0,0,0,0.10) 3px 4px);
  mix-blend-mode: overlay;
}

/* ---------- top bar ---------- */
.topbar {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 16px clamp(14px, 4vw, 40px);
  border-bottom: 1px solid var(--line);
  backdrop-filter: blur(3px);
}
.brand { display: flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 34px; height: 34px;
  border-radius: 8px;
  background: url("assets/favicon.png") center / cover no-repeat, #04141b;
  border: 1px solid var(--line-strong);
  box-shadow: var(--glow);
}
.brand-text h1 {
  margin: 0;
  font-size: clamp(1.05rem, 3.2vw, 1.4rem);
  letter-spacing: 0.04em;
}
.brand-sub {
  margin: 2px 0 0;
  font-family: var(--font-num);
  font-size: 0.7rem;
  letter-spacing: 0.32em;
  color: var(--cyan);
  opacity: 0.85;
}
.clock {
  font-family: var(--font-num);
  font-size: clamp(1.1rem, 4vw, 1.6rem);
  color: var(--cyan-soft);
  text-shadow: var(--glow);
  letter-spacing: 0.08em;
}

/* ---------- panels ---------- */
.panel {
  background: var(--panel);
  border: 1px solid var(--panel-edge);
  border-radius: 14px;
  padding: 18px;
  position: relative;
  backdrop-filter: blur(6px);
  box-shadow: inset 0 0 24px rgba(56, 230, 255, 0.06);
}
.panel::before, .panel::after {
  content: "";
  position: absolute;
  width: 14px; height: 14px;
  border: 2px solid var(--line-strong);
}
.panel::before { top: 7px; left: 7px; border-right: 0; border-bottom: 0; }
.panel::after { bottom: 7px; right: 7px; border-left: 0; border-top: 0; }

.panel-title {
  margin: 0 0 14px;
  font-family: var(--font-num);
  font-size: 0.8rem;
  letter-spacing: 0.22em;
  color: var(--cyan);
  display: flex;
  align-items: baseline;
  gap: 10px;
}
.panel-title .ja {
  font-family: var(--font-ui);
  font-size: 0.72rem;
  letter-spacing: 0.04em;
  color: var(--text-dim);
}

/* ---------- main grid ---------- */
.hud {
  display: grid;
  grid-template-columns: 1fr 1.25fr 1fr;
  gap: clamp(12px, 1.6vw, 20px);
  padding: clamp(14px, 3vw, 28px);
  max-width: 1180px;
  margin: 0 auto;
  align-items: stretch;
}
.panel-center { display: flex; align-items: center; justify-content: center; border: none; background: transparent; box-shadow: none; }
.panel-center::before, .panel-center::after { display: none; }

/* ---------- quick add ---------- */
.quick-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 10px;
}
.quick-btn {
  appearance: none;
  cursor: pointer;
  border: 1px solid var(--line-strong);
  background: linear-gradient(180deg, rgba(56,230,255,0.12), rgba(56,230,255,0.03));
  color: var(--text);
  border-radius: 12px;
  padding: 16px 8px;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 2px;
  transition: transform 0.08s ease, box-shadow 0.2s ease, background 0.2s ease;
}
.quick-btn .q-ml { font-family: var(--font-num); font-size: 1.5rem; color: var(--cyan-soft); }
.quick-btn .q-u { font-size: 0.7rem; color: var(--text-dim); }
.quick-btn:hover { box-shadow: var(--glow); background: linear-gradient(180deg, rgba(56,230,255,0.22), rgba(56,230,255,0.06)); }
.quick-btn:active { transform: scale(0.95); }
.quick-btn.flash { animation: flash 0.45s ease; }
@keyframes flash {
  0% { box-shadow: 0 0 0 0 rgba(56,230,255,0.6); }
  100% { box-shadow: 0 0 0 14px rgba(56,230,255,0); }
}

.custom-add { display: flex; gap: 8px; margin-top: 12px; }
.custom-add input {
  flex: 1;
  min-width: 0;
  background: rgba(3,12,17,0.8);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text);
  padding: 11px 12px;
  font-family: var(--font-num);
  font-size: 1rem;
}
.custom-add input:focus { outline: none; border-color: var(--cyan); box-shadow: var(--glow); }
.add-btn {
  cursor: pointer;
  border: 1px solid var(--cyan);
  background: rgba(56,230,255,0.16);
  color: var(--cyan-soft);
  border-radius: 10px;
  padding: 0 16px;
  font-weight: 600;
}
.add-btn:hover { background: rgba(56,230,255,0.3); box-shadow: var(--glow); }

.ghost-btn {
  cursor: pointer;
  width: 100%;
  margin-top: 12px;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text-dim);
  border-radius: 10px;
  padding: 10px;
  font-size: 0.85rem;
  transition: color 0.2s, border-color 0.2s;
}
.ghost-btn:hover { color: var(--cyan); border-color: var(--line-strong); }
.ghost-btn.small { width: auto; margin: 0; padding: 6px 12px; font-size: 0.75rem; }

/* ---------- tank ---------- */
.tank-wrap { display: flex; flex-direction: column; align-items: center; gap: 16px; width: 100%; }
.tank {
  position: relative;
  width: min(74vw, 290px);
  aspect-ratio: 0.72 / 1;
  border-radius: 26px 26px 30px 30px;
  border: 2px solid var(--line-strong);
  overflow: hidden;
  background:
    linear-gradient(180deg, rgba(56,230,255,0.05), rgba(3,10,14,0.5));
  box-shadow: 0 0 40px rgba(56,230,255,0.18), inset 0 0 30px rgba(0,0,0,0.6);
}
.tank-empty {
  position: absolute;
  inset: 0;
  background: url("assets/progress-tank.png") center / contain no-repeat;
  opacity: 0.18;
  filter: saturate(1.2);
}
.tank-water {
  position: absolute;
  left: 0; right: 0; bottom: 0;
  height: 0%;
  background: linear-gradient(180deg, rgba(56,230,255,0.55), rgba(20,120,150,0.85));
  box-shadow: 0 0 24px rgba(56,230,255,0.6);
  transition: height 0.9s cubic-bezier(0.22, 1, 0.36, 1);
}
.tank-water.full { background: linear-gradient(180deg, rgba(94,255,210,0.6), rgba(30,150,160,0.9)); }
.wave {
  position: absolute;
  top: -14px; left: -50%;
  width: 200%; height: 26px;
  background: radial-gradient(circle at 50% 100%, var(--cyan-soft) 0%, transparent 70%);
  border-radius: 45%;
  opacity: 0.5;
}
.wave-a { animation: wave 5s linear infinite; }
.wave-b { animation: wave 7s linear infinite reverse; opacity: 0.3; top: -10px; }
@keyframes wave { from { transform: translateX(0) rotate(0); } to { transform: translateX(25%) rotate(360deg); } }

.bubbles span {
  position: absolute;
  bottom: 0;
  width: 6px; height: 6px;
  border-radius: 50%;
  background: rgba(214,246,255,0.7);
  animation: rise linear infinite;
}
@keyframes rise {
  0% { transform: translateY(0) scale(0.6); opacity: 0; }
  20% { opacity: 0.8; }
  100% { transform: translateY(-220px) scale(1); opacity: 0; }
}

.tank-glass {
  position: absolute;
  inset: 0;
  pointer-events: none;
  background: linear-gradient(105deg, rgba(255,255,255,0.14) 0%, transparent 22%, transparent 78%, rgba(255,255,255,0.06) 100%);
}
.tank-ticks {
  position: absolute;
  top: 8%; bottom: 8%; left: 6px;
  width: 10px;
  background: repeating-linear-gradient(180deg, var(--line-strong) 0 2px, transparent 2px 11.5%);
  opacity: 0.6;
}
.tank-readout {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  text-align: center;
  text-shadow: 0 0 12px rgba(3,8,12,0.9);
  pointer-events: none;
}
.pct {
  font-family: var(--font-num);
  font-size: clamp(2.4rem, 9vw, 3.6rem);
  font-weight: 700;
  color: #fff;
  line-height: 1;
}
.pct span { font-size: 0.4em; color: var(--cyan-soft); margin-left: 2px; }
.ml-line { margin-top: 8px; font-family: var(--font-num); color: var(--cyan-soft); font-size: 0.95rem; }

.disclaimer {
  margin: 0;
  text-align: center;
  font-size: 0.72rem;
  color: var(--text-dim);
  max-width: 320px;
  line-height: 1.5;
}

/* ---------- right column ---------- */
.panel-right { display: flex; flex-direction: column; gap: 16px; }
.stat-row { display: flex; gap: 12px; }
.stat {
  flex: 1;
  background: rgba(3,12,17,0.55);
  border: 1px solid var(--line);
  border-radius: 10px;
  padding: 12px;
  text-align: center;
}
.stat-k { display: block; font-size: 0.72rem; color: var(--text-dim); letter-spacing: 0.06em; }
.stat-v { display: block; margin-top: 6px; font-family: var(--font-num); font-size: 1.5rem; color: var(--cyan-soft); }
.stat-v small { font-size: 0.55em; color: var(--text-dim); margin-left: 2px; }

.next-sip {
  display: flex;
  align-items: center;
  gap: 12px;
  border: 1px solid var(--line-strong);
  border-radius: 12px;
  padding: 12px 14px;
  background: linear-gradient(120deg, rgba(56,230,255,0.10), rgba(3,12,17,0.4));
  position: relative;
  overflow: hidden;
}
.next-sip.due { border-color: var(--warn); box-shadow: 0 0 18px rgba(255,203,87,0.35); }
.next-sip.done { border-color: #5effd2; box-shadow: 0 0 18px rgba(94,255,210,0.3); }
.next-icon { width: 56px; height: 56px; object-fit: contain; flex-shrink: 0; filter: drop-shadow(0 0 8px rgba(56,230,255,0.5)); }
.next-sip.due .next-icon { animation: pulse 1.4s ease-in-out infinite; }
@keyframes pulse { 0%,100% { transform: scale(1); opacity: 0.85; } 50% { transform: scale(1.12); opacity: 1; } }
.next-body { display: flex; flex-direction: column; gap: 2px; min-width: 0; }
.next-k { font-family: var(--font-num); font-size: 0.66rem; letter-spacing: 0.12em; color: var(--text-dim); }
.next-time { font-family: var(--font-num); font-size: 1.7rem; color: var(--cyan-soft); line-height: 1.1; text-shadow: var(--glow); }
.next-hint { font-size: 0.76rem; color: var(--text-dim); }

.history { flex: 1; display: flex; flex-direction: column; }
.history-head { display: flex; justify-content: space-between; align-items: center; }
.history-head .panel-title { margin-bottom: 0; }
.history-list { list-style: none; margin: 12px 0 0; padding: 0; overflow-y: auto; max-height: 220px; display: flex; flex-direction: column; gap: 8px; }
.history-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 8px;
  background: rgba(3,12,17,0.5);
  border: 1px solid var(--line);
  border-radius: 9px;
  padding: 9px 12px;
  animation: slidein 0.3s ease;
}
@keyframes slidein { from { opacity: 0; transform: translateX(10px); } to { opacity: 1; transform: none; } }
.hi-amt { font-family: var(--font-num); color: var(--cyan-soft); font-size: 1.05rem; }
.hi-time { font-family: var(--font-num); color: var(--text-dim); font-size: 0.8rem; margin-left: auto; }
.hi-del {
  cursor: pointer;
  border: 1px solid var(--line);
  background: transparent;
  color: var(--text-dim);
  border-radius: 6px;
  width: 26px; height: 26px;
  line-height: 1;
  font-size: 0.9rem;
}
.hi-del:hover { color: var(--warn); border-color: var(--warn); }
.history-empty {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 10px;
  text-align: center;
  color: var(--text-dim);
  font-size: 0.8rem;
  padding: 12px;
  line-height: 1.5;
}
.empty-img { width: 96px; height: 96px; object-fit: contain; opacity: 0.7; filter: drop-shadow(0 0 10px rgba(56,230,255,0.3)); }

/* ---------- settings ---------- */
.settings { max-width: 1180px; margin: 0 auto clamp(14px,3vw,28px); }
.settings-grid { display: grid; grid-template-columns: 2fr 1fr 1fr; gap: 18px; }
.set-field { display: flex; flex-direction: column; gap: 8px; }
.set-field label { font-size: 0.82rem; color: var(--text-dim); }
.set-field label strong { color: var(--cyan-soft); font-family: var(--font-num); }
input[type="time"] {
  background: rgba(3,12,17,0.8);
  border: 1px solid var(--line);
  border-radius: 10px;
  color: var(--text);
  padding: 10px 12px;
  font-family: var(--font-num);
  color-scheme: dark;
}
input[type="time"]:focus { outline: none; border-color: var(--cyan); box-shadow: var(--glow); }
input[type="range"] {
  -webkit-appearance: none; appearance: none;
  width: 100%; height: 6px;
  background: linear-gradient(90deg, var(--cyan), var(--cyan-dim));
  border-radius: 4px;
}
input[type="range"]::-webkit-slider-thumb {
  -webkit-appearance: none; appearance: none;
  width: 22px; height: 22px;
  border-radius: 50%;
  background: var(--cyan-soft);
  border: 2px solid #03131a;
  box-shadow: var(--glow);
  cursor: pointer;
}
input[type="range"]::-moz-range-thumb {
  width: 22px; height: 22px; border-radius: 50%;
  background: var(--cyan-soft); border: 2px solid #03131a; box-shadow: var(--glow); cursor: pointer;
}

/* ---------- footer ---------- */
.footer { text-align: center; padding: 8px 16px 40px; }
.share-btn {
  cursor: pointer;
  border: 1px solid var(--line-strong);
  background: rgba(56,230,255,0.12);
  color: var(--text);
  border-radius: 999px;
  padding: 12px 26px;
  font-size: 0.95rem;
  display: inline-flex;
  align-items: center;
  gap: 8px;
  transition: box-shadow 0.2s, background 0.2s;
}
.share-btn:hover { box-shadow: var(--glow); background: rgba(56,230,255,0.22); }
.share-x { font-weight: 800; font-family: var(--font-num); }
.foot-note { margin: 14px 0 0; font-size: 0.72rem; color: var(--text-dim); }

/* ---------- toast ---------- */
.toast-wrap {
  position: fixed;
  left: 50%;
  bottom: 24px;
  transform: translateX(-50%);
  z-index: 60;
  display: flex;
  flex-direction: column;
  gap: 8px;
  align-items: center;
  width: max-content;
  max-width: 90vw;
}
.toast {
  background: rgba(6,22,30,0.95);
  border: 1px solid var(--line-strong);
  border-left: 3px solid var(--cyan);
  border-radius: 10px;
  padding: 12px 18px;
  color: var(--text);
  font-size: 0.88rem;
  box-shadow: 0 8px 30px rgba(0,0,0,0.5), var(--glow);
  animation: toastin 0.3s ease;
}
.toast.warn { border-left-color: var(--warn); }
.toast.out { animation: toastout 0.3s ease forwards; }
@keyframes toastin { from { opacity: 0; transform: translateY(12px); } to { opacity: 1; transform: none; } }
@keyframes toastout { to { opacity: 0; transform: translateY(12px); } }

/* ---------- modal ---------- */
.modal-overlay {
  position: fixed;
  inset: 0;
  z-index: 80;
  background: rgba(2,6,9,0.78);
  backdrop-filter: blur(4px);
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  animation: fade 0.2s ease;
}
.modal-overlay[hidden] { display: none; }
@keyframes fade { from { opacity: 0; } to { opacity: 1; } }
.modal {
  width: min(420px, 100%);
  background: linear-gradient(180deg, rgba(10,26,34,0.98), rgba(5,15,20,0.98));
  border: 1px solid var(--line-strong);
  border-radius: 16px;
  padding: 26px;
  box-shadow: 0 20px 60px rgba(0,0,0,0.6), var(--glow);
}
.modal-title { margin: 0 0 12px; color: var(--cyan-soft); font-size: 1.15rem; letter-spacing: 0.04em; }
.modal-msg { margin: 0 0 22px; color: var(--text); line-height: 1.6; font-size: 0.92rem; }
.modal-actions { display: flex; gap: 12px; justify-content: flex-end; }
.modal-actions .ghost-btn { width: auto; margin: 0; padding: 10px 18px; }
.danger-btn {
  cursor: pointer;
  border: 1px solid var(--warn);
  background: rgba(255,203,87,0.16);
  color: var(--warn);
  border-radius: 10px;
  padding: 10px 18px;
  font-weight: 600;
}
.danger-btn:hover { background: rgba(255,203,87,0.28); }

/* ---------- a11y ---------- */
.sr-only {
  position: absolute; width: 1px; height: 1px;
  padding: 0; margin: -1px; overflow: hidden;
  clip: rect(0,0,0,0); white-space: nowrap; border: 0;
}

/* ---------- responsive ---------- */
@media (max-width: 880px) {
  .hud { grid-template-columns: 1fr; }
  /* mobile: tank first, then quick add, then status */
  .panel-center { order: -2; }
  .panel-left { order: -1; }
  .panel-right { order: 0; }
  .tank { width: min(64vw, 240px); }
  .settings-grid { grid-template-columns: 1fr; }
  .history-list { max-height: 180px; }
}
@media (max-width: 420px) {
  .quick-btn { padding: 14px 6px; }
  .quick-btn .q-ml { font-size: 1.3rem; }
}

@media (prefers-reduced-motion: reduce) {
  .wave, .bubbles span, .next-sip.due .next-icon { animation: none; }
  .tank-water { transition: none; }
}