:root {
  --ink: #14201c;
  --ink-soft: #3d4f47;
  --paper: #eef4f0;
  --surface: rgba(255, 255, 255, 0.88);
  --line: rgba(20, 32, 28, 0.1);
  --teal: #0f6b5c;
  --teal-deep: #0a4d42;
  --mint: #b7e4c7;
  --sand: #e8ddc8;
  --danger: #9b2c2c;
  --shadow: 0 12px 32px rgba(20, 32, 28, 0.12);
  --radius: 20px;
  --font-display: "Fraunces", Georgia, serif;
  --font-body: "DM Sans", sans-serif;
  --topbar-h: 4.5rem;
  --tabbar-h: 4.75rem;
  --safe-top: env(safe-area-inset-top, 0px);
  --safe-bottom: env(safe-area-inset-bottom, 0px);
  --app-max: 430px;
}

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

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

body {
  font-family: var(--font-body);
  color: var(--ink);
  background:
    radial-gradient(circle at 20% 0%, #d9ebe1 0%, transparent 40%),
    linear-gradient(180deg, #dce8e1 0%, #f2efe6 100%);
  line-height: 1.45;
  overscroll-behavior: none;
}

.phone {
  position: relative;
  width: min(100%, var(--app-max));
  min-height: 100dvh;
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  overflow: hidden;
  background: transparent;
}

.atmosphere {
  position: absolute;
  inset: 0;
  z-index: 0;
  pointer-events: none;
  background:
    radial-gradient(ellipse 90% 55% at 10% 0%, rgba(183, 228, 199, 0.75), transparent 60%),
    radial-gradient(ellipse 70% 40% at 100% 15%, rgba(232, 221, 200, 0.8), transparent 55%),
    linear-gradient(180deg, #eef6f1 0%, #f7f3ea 55%, #e8f0eb 100%);
  animation: drift 14s ease-in-out infinite alternate;
}

@keyframes drift {
  from {
    transform: translateY(0) scale(1);
  }
  to {
    transform: translateY(-10px) scale(1.03);
  }
}

.topbar,
.screens,
.tabbar,
.toast {
  position: relative;
  z-index: 1;
}

.topbar {
  flex: 0 0 auto;
  padding: calc(0.85rem + var(--safe-top)) 1.15rem 0.75rem;
  min-height: calc(var(--topbar-h) + var(--safe-top));
}

.brand-mark {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.85rem;
  font-weight: 650;
  letter-spacing: -0.03em;
  color: var(--teal-deep);
  line-height: 1;
}

.topbar-sub {
  margin: 0.35rem 0 0;
  color: var(--ink-soft);
  font-size: 0.92rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}

.screens {
  flex: 1 1 auto;
  min-height: 0;
  overflow: hidden;
  position: relative;
}

.screen {
  position: absolute;
  inset: 0;
  overflow-y: auto;
  overscroll-behavior: contain;
  padding: 0.25rem 1.15rem calc(1.25rem + var(--tabbar-h) + var(--safe-bottom));
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: opacity 0.22s ease, transform 0.22s ease;
}

.screen.is-active {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
  animation: screen-in 0.28s ease both;
}

@keyframes screen-in {
  from {
    opacity: 0;
    transform: translateY(12px);
  }
  to {
    opacity: 1;
    transform: translateY(0);
  }
}

.screen-intro {
  margin-bottom: 1.15rem;
}

.screen-intro h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.7rem;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.screen-intro p {
  margin: 0.35rem 0 0;
  color: var(--ink-soft);
  font-size: 0.98rem;
}

.profile-list,
.reading-list {
  list-style: none;
  margin: 0 0 1rem;
  padding: 0;
  display: grid;
  gap: 0.7rem;
}

.profile-item,
.reading-item {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 16px;
  background: var(--surface);
  box-shadow: var(--shadow);
  text-align: left;
  padding: 0.95rem 1rem;
  color: inherit;
  transition: transform 0.15s ease, border-color 0.15s ease, background 0.15s ease;
}

button.profile-item {
  cursor: pointer;
  font: inherit;
  display: grid;
  gap: 0.2rem;
}

.profile-item:active,
.reading-item:active {
  transform: scale(0.985);
}

.profile-item.is-selected {
  border-color: rgba(15, 107, 92, 0.45);
  background: linear-gradient(180deg, rgba(183, 228, 199, 0.45), rgba(255, 255, 255, 0.9));
}

.profile-name {
  font-weight: 700;
  font-size: 1.05rem;
}

.profile-meta,
.reading-meta {
  color: var(--ink-soft);
  font-size: 0.9rem;
}

.reading-item {
  display: grid;
  gap: 0.45rem;
}

.reading-values {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.45rem;
}

.reading-values span {
  display: grid;
  gap: 0.1rem;
}

.reading-values strong {
  font-size: 1.15rem;
  font-variant-numeric: tabular-nums;
  color: var(--teal-deep);
}

.reading-values small {
  color: var(--ink-soft);
  font-size: 0.72rem;
  text-transform: uppercase;
  letter-spacing: 0.04em;
}

.empty-state {
  border: 1px dashed var(--line);
  border-radius: 16px;
  padding: 1.4rem 1rem;
  text-align: center;
  color: var(--ink-soft);
  background: rgba(255, 255, 255, 0.4);
}

.stack-form {
  display: grid;
  gap: 0.85rem;
}

.create-sheet {
  margin-top: 0.25rem;
  padding: 1rem;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow);
  animation: screen-in 0.24s ease both;
}

label {
  display: grid;
  gap: 0.4rem;
  font-size: 0.9rem;
  font-weight: 600;
  color: var(--ink-soft);
}

input,
select,
button {
  font: inherit;
}

input,
select {
  width: 100%;
  min-height: 3.1rem;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.95);
  padding: 0.85rem 0.95rem;
  color: var(--ink);
  font-size: 1.05rem;
  appearance: none;
}

input:focus,
select:focus {
  outline: none;
  border-color: var(--teal);
  box-shadow: 0 0 0 3px rgba(15, 107, 92, 0.14);
}

.row {
  display: grid;
  grid-template-columns: 1.15fr 0.85fr;
  gap: 0.7rem;
}

.metrics {
  display: grid;
  gap: 0.8rem;
}

.field {
  position: relative;
  display: block;
}

.field .unit {
  position: absolute;
  top: 50%;
  right: 0.95rem;
  transform: translateY(-50%);
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--ink-soft);
  pointer-events: none;
}

.field input {
  padding-right: 3.6rem;
  font-size: 1.25rem;
  font-variant-numeric: tabular-nums;
}

.btn {
  border: none;
  border-radius: 14px;
  min-height: 3.15rem;
  padding: 0.9rem 1.1rem;
  cursor: pointer;
  font-weight: 700;
  transition: transform 0.12s ease, background 0.2s ease, opacity 0.2s ease;
}

.btn:active {
  transform: scale(0.98);
}

.btn.primary {
  background: var(--teal);
  color: #fff;
}

.btn.primary:active {
  background: var(--teal-deep);
}

.btn.ghost {
  width: 100%;
  background: rgba(255, 255, 255, 0.55);
  color: var(--teal-deep);
  border: 1px solid var(--line);
}

.btn.danger {
  width: 100%;
  background: rgba(155, 44, 44, 0.12);
  color: var(--danger);
  border: 1px solid rgba(155, 44, 44, 0.28);
}

.form-actions {
  display: grid;
  gap: 0.65rem;
}

.profile-row {
  display: grid;
  grid-template-columns: 1fr auto;
  gap: 0.45rem;
  align-items: stretch;
}

.profile-edit {
  border: 1px solid var(--line);
  border-radius: 16px;
  background: rgba(255, 255, 255, 0.75);
  color: var(--teal-deep);
  font: inherit;
  font-weight: 700;
  font-size: 0.85rem;
  padding: 0 0.9rem;
  cursor: pointer;
}

.reading-who {
  font-weight: 700;
  color: var(--teal-deep);
  font-size: 0.92rem;
}

.login-screen {
  display: flex;
  flex-direction: column;
  justify-content: center;
  gap: 1.4rem;
  padding-top: 1.5rem;
}

.login-hero {
  text-align: center;
}

.login-brand {
  margin-bottom: 1rem;
}

.login-hero h1 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.85rem;
  font-weight: 650;
  letter-spacing: -0.03em;
}

.login-hero p {
  margin: 0.45rem 0 0;
  color: var(--ink-soft);
}

.login-form {
  padding: 1rem;
  border-radius: 18px;
  border: 1px solid var(--line);
  background: var(--surface);
  box-shadow: var(--shadow);
}

.google-gate {
  display: grid;
  gap: 0.85rem;
  justify-items: center;
}

.google-button-host {
  min-height: 2.75rem;
  display: grid;
  place-items: center;
  width: 100%;
}

.google-gate-status {
  margin: 0;
  text-align: center;
  color: var(--danger);
  font-size: 0.92rem;
  font-weight: 600;
}

.account-group {
  margin-top: 0.9rem;
}

.account-group .btn.ghost + .btn.ghost {
  margin-top: 0.55rem;
}

.phone[data-authed="false"] .screens {
  padding-bottom: 1.5rem;
}

.sticky-cta {
  position: sticky;
  bottom: 0.25rem;
  margin-top: 0.5rem;
  box-shadow: 0 8px 24px rgba(15, 107, 92, 0.28);
}

.settings-group {
  border: 1px solid var(--line);
  border-radius: 18px;
  background: var(--surface);
  box-shadow: var(--shadow);
  padding: 1rem;
  display: grid;
  gap: 0.9rem;
}

.settings-label-row h2 {
  margin: 0;
  font-family: var(--font-display);
  font-size: 1.2rem;
  font-weight: 650;
  letter-spacing: -0.02em;
}

.settings-label-row p {
  margin: 0.3rem 0 0;
  color: var(--ink-soft);
  font-size: 0.92rem;
}

.language-options {
  display: grid;
  gap: 0.65rem;
}

.language-option {
  width: 100%;
  border: 1px solid var(--line);
  border-radius: 14px;
  background: rgba(255, 255, 255, 0.9);
  min-height: 3.4rem;
  padding: 0.85rem 1rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 0.75rem;
  cursor: pointer;
  color: inherit;
  font: inherit;
  transition: transform 0.12s ease, border-color 0.15s ease, background 0.15s ease;
}

.language-option:active {
  transform: scale(0.985);
}

.language-option.is-selected {
  border-color: rgba(15, 107, 92, 0.45);
  background: linear-gradient(180deg, rgba(183, 228, 199, 0.45), rgba(255, 255, 255, 0.92));
}

.language-name {
  font-weight: 700;
  font-size: 1.02rem;
}

.language-code {
  min-width: 2rem;
  text-align: center;
  font-size: 0.85rem;
  font-weight: 700;
  color: var(--teal-deep);
}

.tabbar {
  position: fixed;
  left: 50%;
  bottom: 0;
  transform: translateX(-50%);
  width: min(100%, var(--app-max));
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0.15rem;
  padding: 0.4rem 0.45rem calc(0.4rem + var(--safe-bottom));
  background: rgba(247, 250, 248, 0.92);
  border-top: 1px solid var(--line);
  backdrop-filter: blur(14px);
  -webkit-backdrop-filter: blur(14px);
}

.tab {
  border: none;
  background: transparent;
  color: var(--ink-soft);
  min-height: 3.35rem;
  border-radius: 14px;
  display: grid;
  justify-items: center;
  align-content: center;
  gap: 0.12rem;
  font-size: 0.66rem;
  font-weight: 700;
  letter-spacing: 0.01em;
  cursor: pointer;
  padding: 0.2rem 0.15rem;
}

.tab-icon {
  width: 1.45rem;
  height: 1.45rem;
  display: grid;
  place-items: center;
}

.tab-icon svg {
  width: 1.35rem;
  height: 1.35rem;
}

.tab.is-active {
  color: var(--teal-deep);
  background: rgba(183, 228, 199, 0.45);
}

.toast {
  position: fixed;
  left: 50%;
  bottom: calc(var(--tabbar-h) + var(--safe-bottom) + 0.65rem);
  transform: translateX(-50%) translateY(8px);
  width: min(calc(100% - 2rem), calc(var(--app-max) - 2rem));
  margin: 0;
  padding: 0.8rem 1rem;
  border-radius: 14px;
  background: var(--teal-deep);
  color: #fff;
  font-weight: 600;
  text-align: center;
  box-shadow: var(--shadow);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s ease, transform 0.2s ease;
  z-index: 5;
}

.toast.is-visible {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

.toast.error {
  background: var(--danger);
}

[hidden] {
  display: none !important;
}

@media (min-width: 480px) {
  body {
    display: grid;
    place-items: center;
    padding: 1rem 0;
  }

  .phone {
    min-height: min(900px, calc(100dvh - 2rem));
    max-height: min(900px, calc(100dvh - 2rem));
    border: 1px solid rgba(20, 32, 28, 0.08);
    border-radius: 28px;
    box-shadow: 0 24px 60px rgba(20, 32, 28, 0.16);
    overflow: hidden;
  }

  .tabbar {
    position: absolute;
    border-radius: 0 0 28px 28px;
  }

  .toast {
    position: absolute;
  }
}