:root {
  --bg0: #071a22;
  --bg1: #0d2f3a;
  --bg2: #134556;
  --foam: #e7f6f4;
  --foam-dim: rgba(231, 246, 244, 0.72);
  --foam-mute: rgba(231, 246, 244, 0.48);
  --accent: #3ec7b2;
  --accent-2: #7ed8c8;
  --warn: #f0c27a;
  --danger: #ef8e8e;
  --glass: rgba(255, 255, 255, 0.06);
  --line: rgba(231, 246, 244, 0.12);
  --shadow: 0 18px 50px rgba(0, 0, 0, 0.28);
  --radius: 22px;
  --font: "Manrope", system-ui, sans-serif;
  --display: "Fraunces", Georgia, serif;
}

* {
  box-sizing: border-box;
}

html,
body {
  margin: 0;
  min-height: 100%;
}

body {
  font-family: var(--font);
  color: var(--foam);
  background: radial-gradient(1200px 700px at 10% -10%, #1a5a68 0%, transparent 55%),
    radial-gradient(900px 600px at 100% 0%, #0f3d4d 0%, transparent 50%),
    linear-gradient(165deg, var(--bg0), var(--bg1) 45%, #0a2832);
  min-height: 100vh;
  line-height: 1.45;
  overflow-x: hidden;
}

.atmosphere {
  pointer-events: none;
  position: fixed;
  inset: 0;
  background:
    radial-gradient(circle at 20% 80%, rgba(62, 199, 178, 0.12), transparent 35%),
    radial-gradient(circle at 85% 30%, rgba(126, 216, 200, 0.08), transparent 30%);
  animation: drift 18s ease-in-out infinite alternate;
  z-index: 0;
}

@keyframes drift {
  from { transform: translate3d(0, 0, 0) scale(1); }
  to { transform: translate3d(-1.5%, 1.2%, 0) scale(1.04); }
}

.top,
main,
.sheet {
  position: relative;
  z-index: 1;
}

.top {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.25rem 0.5rem;
  max-width: 520px;
  margin: 0 auto;
}

.brand {
  display: flex;
  gap: 0.85rem;
  align-items: center;
}

.brand-mark {
  width: 2.4rem;
  height: 2.4rem;
  border-radius: 0.85rem;
  background:
    linear-gradient(160deg, rgba(126, 216, 200, 0.95), rgba(62, 199, 178, 0.55) 55%, rgba(19, 69, 86, 0.2)),
    var(--bg2);
  box-shadow: inset 0 -10px 18px rgba(7, 26, 34, 0.35);
  position: relative;
}

.brand-mark::after {
  content: "";
  position: absolute;
  left: 20%;
  right: 20%;
  bottom: 22%;
  height: 38%;
  border-radius: 999px 999px 12px 12px;
  background: rgba(231, 246, 244, 0.35);
  animation: bob 3.2s ease-in-out infinite;
}

@keyframes bob {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-3px); }
}

.brand-name {
  margin: 0;
  font-family: var(--display);
  font-size: 1.55rem;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.brand-sub {
  margin: 0.1rem 0 0;
  color: var(--foam-mute);
  font-size: 0.85rem;
}

.top-actions {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

.install-btn {
  padding: 0.55rem 0.85rem;
  font-size: 0.85rem;
  border-radius: 0.85rem;
  white-space: nowrap;
}

.icon-btn {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--glass);
  color: var(--foam);
  width: 2.6rem;
  height: 2.6rem;
  border-radius: 0.9rem;
  display: grid;
  place-items: center;
  cursor: pointer;
  transition: background 0.2s ease, transform 0.2s ease;
}

.icon-btn:hover {
  background: rgba(255, 255, 255, 0.1);
}

.icon-btn:active {
  transform: scale(0.96);
}

main {
  max-width: 520px;
  margin: 0 auto;
  padding: 0.5rem 1.25rem 3rem;
  display: grid;
  gap: 1.5rem;
}

.hero {
  text-align: center;
  padding-top: 0.4rem;
}

.wave-wrap {
  width: min(240px, 68vw);
  aspect-ratio: 1;
  margin: 0 auto 1rem;
  position: relative;
  animation: rise-in 0.7s cubic-bezier(0.2, 0.8, 0.2, 1) both;
}

@keyframes rise-in {
  from { opacity: 0; transform: translateY(12px) scale(0.96); }
  to { opacity: 1; transform: none; }
}

.wave-ring {
  position: absolute;
  inset: 0;
  transform: rotate(-90deg);
}

.ring-track,
.ring-progress {
  fill: none;
  stroke-width: 8;
}

.ring-track {
  stroke: rgba(231, 246, 244, 0.1);
}

.ring-progress {
  stroke: url(#none);
  stroke: var(--accent);
  stroke-linecap: round;
  stroke-dasharray: 528;
  stroke-dashoffset: 528;
  transition: stroke-dashoffset 0.8s cubic-bezier(0.2, 0.8, 0.2, 1), stroke 0.3s ease;
  filter: drop-shadow(0 0 10px rgba(62, 199, 178, 0.35));
}

.wave-core {
  position: absolute;
  inset: 18px;
  border-radius: 50%;
  overflow: hidden;
  background: linear-gradient(180deg, rgba(19, 69, 86, 0.55), rgba(7, 26, 34, 0.85));
  border: 1px solid var(--line);
  box-shadow: var(--shadow);
}

.liquid {
  position: absolute;
  left: -10%;
  right: -10%;
  bottom: 0;
  height: var(--fill, 0%);
  background: linear-gradient(180deg, rgba(126, 216, 200, 0.75), rgba(30, 140, 130, 0.95));
  transition: height 0.85s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.liquid::before,
.liquid::after {
  content: "";
  position: absolute;
  left: -20%;
  width: 140%;
  height: 18px;
  top: -8px;
  border-radius: 40%;
  background: rgba(231, 246, 244, 0.22);
  animation: wave 3.5s linear infinite;
}

.liquid::after {
  top: -4px;
  opacity: 0.45;
  animation-duration: 5s;
  animation-direction: reverse;
}

@keyframes wave {
  from { transform: translateX(0) rotate(0.001deg); }
  to { transform: translateX(-25%) rotate(0.001deg); }
}

.wave-copy {
  position: absolute;
  inset: 0;
  display: grid;
  place-content: center;
  text-align: center;
  z-index: 1;
  text-shadow: 0 2px 12px rgba(0, 0, 0, 0.35);
}

.wave-ml {
  margin: 0;
  font-family: var(--display);
  font-size: 2.55rem;
  font-weight: 650;
  letter-spacing: -0.03em;
  line-height: 1;
}

.wave-unit {
  margin: 0.35rem 0 0;
  color: var(--foam-dim);
  font-size: 0.92rem;
}

.status {
  margin: 0;
  font-family: var(--display);
  font-size: clamp(1.45rem, 4.5vw, 1.85rem);
  font-weight: 650;
  letter-spacing: -0.02em;
}

.hint {
  margin: 0.4rem 0 0;
  color: var(--foam-mute);
  font-size: 0.95rem;
}

.add-panel,
.log,
.week {
  animation: rise-in 0.75s cubic-bezier(0.2, 0.8, 0.2, 1) both;
  animation-delay: 0.08s;
}

.presets {
  display: flex;
  flex-wrap: wrap;
  gap: 0.55rem;
  margin-bottom: 0.85rem;
}

.chip {
  appearance: none;
  border: 1px solid var(--line);
  background: var(--glass);
  color: var(--foam);
  border-radius: 999px;
  padding: 0.55rem 0.9rem;
  font: inherit;
  font-size: 0.92rem;
  cursor: pointer;
  transition: background 0.2s ease, border-color 0.2s ease, transform 0.15s ease;
}

.chip:hover,
.chip.is-active {
  background: rgba(62, 199, 178, 0.18);
  border-color: rgba(62, 199, 178, 0.45);
}

.chip:active {
  transform: scale(0.97);
}

.add-form {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.75rem;
  align-items: end;
}

.field {
  display: grid;
  gap: 0.35rem;
  text-align: left;
}

.field span {
  font-size: 0.8rem;
  color: var(--foam-mute);
}

.field input {
  width: 100%;
  border: 1px solid var(--line);
  background: rgba(7, 26, 34, 0.45);
  color: var(--foam);
  border-radius: 0.9rem;
  padding: 0.85rem 0.95rem;
  font: inherit;
  font-size: 1.05rem;
  outline: none;
  transition: border-color 0.2s ease, box-shadow 0.2s ease;
}

.field input:focus {
  border-color: rgba(62, 199, 178, 0.55);
  box-shadow: 0 0 0 3px rgba(62, 199, 178, 0.15);
}

.cta,
.ghost {
  appearance: none;
  border: 0;
  border-radius: 0.95rem;
  font: inherit;
  font-weight: 600;
  cursor: pointer;
  padding: 0.9rem 1.15rem;
  transition: transform 0.15s ease, filter 0.2s ease, background 0.2s ease;
}

.cta {
  background: linear-gradient(180deg, #5fd4c2, #2da894);
  color: #04242c;
  box-shadow: 0 10px 24px rgba(45, 168, 148, 0.28);
}

.cta:hover {
  filter: brightness(1.05);
}

.cta:active {
  transform: translateY(1px) scale(0.99);
}

.ghost {
  background: transparent;
  color: var(--foam-dim);
  border: 1px solid var(--line);
}

.section-head {
  display: flex;
  align-items: baseline;
  justify-content: space-between;
  gap: 1rem;
  margin-bottom: 0.75rem;
}

.section-head h2 {
  margin: 0;
  font-family: var(--display);
  font-size: 1.2rem;
  font-weight: 650;
}

.section-head p {
  margin: 0;
  color: var(--foam-mute);
  font-size: 0.88rem;
}

.log-list {
  list-style: none;
  margin: 0;
  padding: 0;
  display: grid;
  gap: 0.55rem;
}

.log-item {
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  padding: 0.85rem 0.95rem;
  border-radius: 1rem;
  border: 1px solid var(--line);
  background: rgba(255, 255, 255, 0.035);
}

.log-item strong {
  font-weight: 650;
}

.log-item span {
  color: var(--foam-mute);
  font-size: 0.85rem;
}

.log-item button {
  appearance: none;
  border: 0;
  background: transparent;
  color: var(--foam-mute);
  cursor: pointer;
  font: inherit;
  font-size: 0.85rem;
  padding: 0.25rem 0.4rem;
}

.log-item button:hover {
  color: var(--danger);
}

.empty {
  color: var(--foam-mute);
  padding: 0.5rem 0.1rem 0.2rem;
  font-size: 0.95rem;
}

.week-bars {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 0.45rem;
  align-items: end;
  min-height: 120px;
}

.week-col {
  display: grid;
  gap: 0.4rem;
  justify-items: center;
}

.week-bar {
  width: 100%;
  max-width: 34px;
  height: 96px;
  border-radius: 999px;
  background: rgba(255, 255, 255, 0.06);
  overflow: hidden;
  display: flex;
  align-items: flex-end;
}

.week-fill {
  width: 100%;
  background: linear-gradient(180deg, var(--accent-2), var(--accent));
  border-radius: 999px;
  transition: height 0.6s cubic-bezier(0.2, 0.8, 0.2, 1);
}

.week-col small {
  color: var(--foam-mute);
  font-size: 0.72rem;
}

.sheet {
  border: 1px solid var(--line);
  border-radius: 1.4rem 1.4rem 0 0;
  padding: 0;
  width: min(520px, 100%);
  max-width: 100%;
  margin: auto 0 0 auto;
  background: linear-gradient(180deg, #123946, #0b2530);
  color: var(--foam);
  box-shadow: var(--shadow);
}

.sheet::backdrop {
  background: rgba(4, 16, 22, 0.62);
  backdrop-filter: blur(4px);
}

.sheet-inner {
  padding: 1.1rem 1.15rem 1.4rem;
}

.sheet-inner header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 0.35rem;
}

.sheet-inner h2 {
  margin: 0;
  font-family: var(--display);
  font-size: 1.35rem;
}

.sheet-lead {
  margin: 0 0 1rem;
  color: var(--foam-mute);
  font-size: 0.92rem;
}

.grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 0.75rem;
}

.sheet-actions {
  display: flex;
  gap: 0.65rem;
  margin-top: 1.1rem;
}

.sheet-actions .cta,
.sheet-actions .ghost {
  flex: 1;
}

.toast {
  position: fixed;
  left: 50%;
  bottom: 1.4rem;
  transform: translateX(-50%);
  background: rgba(7, 26, 34, 0.92);
  border: 1px solid var(--line);
  color: var(--foam);
  padding: 0.75rem 1rem;
  border-radius: 999px;
  z-index: 5;
  font-size: 0.92rem;
  box-shadow: var(--shadow);
  animation: rise-in 0.25s ease both;
}

@media (max-width: 420px) {
  .add-form {
    grid-template-columns: 1fr;
  }

  .cta {
    width: 100%;
  }

  .grid {
    grid-template-columns: 1fr;
  }
}