:root {
  color-scheme: light;
  --bg: #f4f7f9;
  --surface: #ffffff;
  --surface-2: #edf3f6;
  --surface-3: #e3ecef;
  --text: #17232d;
  --muted: #62717c;
  --line: #d8e1e6;
  --brand: #16324f;
  --brand-strong: #0e2439;
  --accent: #2c7a6b;
  --accent-soft: #dff1ec;
  --good: #16765d;
  --good-soft: #def3ea;
  --warn: #9a6416;
  --warn-soft: #fff1d6;
  --danger: #b33b3b;
  --danger-soft: #fde8e8;
  --shadow: 0 14px 36px rgba(20, 45, 64, 0.08);
  --radius: 18px;
  --radius-small: 11px;
  --max-width: 1120px;
  --focus: #3182ce;
}

@media (prefers-color-scheme: dark) {
  :root {
    color-scheme: dark;
    --bg: #0d151b;
    --surface: #142029;
    --surface-2: #192a34;
    --surface-3: #233742;
    --text: #edf5f7;
    --muted: #a7bac3;
    --line: #2b414c;
    --brand: #b9d8e8;
    --brand-strong: #d9edf5;
    --accent: #6bc7b4;
    --accent-soft: #193e38;
    --good: #73d2b8;
    --good-soft: #173a32;
    --warn: #f0bd6d;
    --warn-soft: #3e3018;
    --danger: #ff9292;
    --danger-soft: #472525;
    --shadow: 0 16px 38px rgba(0, 0, 0, 0.28);
    --focus: #73b9f2;
  }
}

* { box-sizing: border-box; }
html { min-height: 100%; scroll-behavior: smooth; }
body {
  margin: 0;
  min-height: 100vh;
  background: var(--bg);
  color: var(--text);
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
  font-size: 16px;
  line-height: 1.55;
  -webkit-font-smoothing: antialiased;
}

a { color: var(--accent); text-decoration-thickness: 1px; text-underline-offset: 3px; }
a:hover { text-decoration-thickness: 2px; }
button, input, textarea, select { font: inherit; }
button, a { -webkit-tap-highlight-color: transparent; }
button:focus-visible, a:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
  outline: 3px solid color-mix(in srgb, var(--focus) 48%, transparent);
  outline-offset: 2px;
}
img, svg { max-width: 100%; }
h1, h2, h3 { margin: 0; line-height: 1.14; letter-spacing: -0.025em; }
h1 { font-size: clamp(2rem, 5vw, 3.4rem); }
h2 { font-size: clamp(1.3rem, 3vw, 1.75rem); }
h3 { font-size: 1.18rem; }
p { margin: 0 0 1rem; }
.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; }
.skip-link { position: fixed; left: 1rem; top: -5rem; z-index: 100; background: var(--surface); padding: .7rem 1rem; border-radius: 8px; box-shadow: var(--shadow); }
.skip-link:focus { top: 1rem; }

.site-header {
  position: sticky;
  top: 0;
  z-index: 30;
  background: color-mix(in srgb, var(--bg) 90%, transparent);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid color-mix(in srgb, var(--line) 80%, transparent);
}
.header-inner {
  max-width: var(--max-width);
  min-height: 70px;
  margin: 0 auto;
  padding: .75rem 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: 1rem;
}
.brand { display: inline-flex; align-items: center; gap: .65rem; color: var(--brand); font-weight: 800; font-size: 1.15rem; text-decoration: none; }
.brand-mark { width: 2rem; height: 2rem; border-radius: 9px; display: grid; place-items: center; color: #fff; background: linear-gradient(145deg, #16324f, #2c7a6b); font-size: 1.2rem; }
.primary-nav { display: flex; align-items: center; gap: .3rem; }
.primary-nav > a, .nav-link-button { border: 0; background: transparent; color: var(--muted); text-decoration: none; padding: .55rem .75rem; border-radius: 9px; cursor: pointer; font-weight: 650; }
.primary-nav > a:hover, .nav-link-button:hover, .primary-nav > a[aria-current="page"] { color: var(--text); background: var(--surface-2); }
.logout-form { margin: 0; }
.nav-toggle { display: none; border: 1px solid var(--line); border-radius: 9px; background: var(--surface); color: var(--text); padding: .45rem .7rem; }

.page-shell { width: min(calc(100% - 2rem), var(--max-width)); margin: 0 auto; padding: 2.7rem 0 4rem; min-height: calc(100vh - 150px); }
.page-heading { margin-bottom: 1.7rem; }
.page-heading p { max-width: 720px; margin: .7rem 0 0; color: var(--muted); font-size: 1.04rem; }
.heading-row { display: flex; justify-content: space-between; align-items: flex-end; gap: 1.25rem; }
.heading-actions, .form-actions, .card-actions { display: flex; align-items: center; flex-wrap: wrap; gap: .65rem; }
.heading-actions form, .card-actions form { margin: 0; }
.eyebrow, .card-label { display: block; color: var(--muted); font-size: .76rem; font-weight: 800; text-transform: uppercase; letter-spacing: .11em; margin-bottom: .35rem; }
.section-heading { margin: 2.3rem 0 1rem; }
.narrow-page { width: min(100%, 680px); margin: 0 auto; }

.card {
  background: var(--surface);
  border: 1px solid var(--line);
  border-radius: var(--radius);
  padding: clamp(1.2rem, 3vw, 2rem);
  box-shadow: var(--shadow);
}
.compact-card { padding: 1.35rem 1.5rem; }
.spaced-card { margin-top: 1.25rem; }
.card h2 + p, .card h3 + p { margin-top: .6rem; color: var(--muted); }
.card-heading-row { display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem; }
.card-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(min(100%, 300px), 1fr)); gap: 1rem; }
.plan-card-active { border-color: color-mix(in srgb, var(--accent) 48%, var(--line)); box-shadow: 0 15px 38px color-mix(in srgb, var(--accent) 12%, transparent); }
.plan-card h2 a { color: var(--text); text-decoration: none; }
.plan-card .card-actions { margin-top: 1.2rem; }

.button {
  appearance: none;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: .45rem;
  min-height: 42px;
  padding: .62rem 1rem;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--surface);
  color: var(--text);
  font-weight: 750;
  text-decoration: none;
  cursor: pointer;
  transition: transform .12s ease, border-color .12s ease, background .12s ease;
}
.button:hover { transform: translateY(-1px); border-color: color-mix(in srgb, var(--accent) 50%, var(--line)); text-decoration: none; }
.button:active { transform: translateY(0); }
.button:disabled { opacity: .55; cursor: wait; }
.button-primary { color: #fff; background: linear-gradient(145deg, #173853, #267261); border-color: transparent; }
.button-primary:hover { background: linear-gradient(145deg, #102e48, #1e6657); }
.button-quiet { background: transparent; }
.button-small { min-height: 34px; padding: .38rem .7rem; font-size: .88rem; border-radius: 8px; }
.button-wide { width: 100%; }
.button-danger { background: var(--danger); border-color: var(--danger); color: #fff; }
.button-danger-quiet { color: var(--danger); }
.text-link { font-weight: 750; text-decoration: none; }
.danger-link { color: var(--danger); }

.messages { display: grid; gap: .6rem; margin-bottom: 1rem; }
.message { border: 1px solid var(--line); border-left: 4px solid var(--accent); background: var(--surface); border-radius: 10px; padding: .75rem 1rem; box-shadow: var(--shadow); }
.message-error { border-left-color: var(--danger); }
.message-success { border-left-color: var(--good); }

.auth-layout { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(320px, .75fr); align-items: center; gap: clamp(2rem, 7vw, 6rem); min-height: 60vh; }
.auth-intro p { max-width: 600px; color: var(--muted); font-size: 1.12rem; margin-top: 1rem; }
.auth-card { width: 100%; }
.auth-card h2 { margin-bottom: 1.25rem; }
.card-footnote { color: var(--muted); margin: 1rem 0 0; text-align: center; font-size: .93rem; }

.stack-form { display: grid; gap: 1rem; }
.field { display: grid; gap: .35rem; }
.field label { font-weight: 750; }
.required { color: var(--danger); }
.field input, .field textarea, .field select, .inline-input input {
  width: 100%;
  min-height: 46px;
  border: 1px solid var(--line);
  border-radius: 10px;
  background: var(--bg);
  color: var(--text);
  padding: .68rem .78rem;
}
.field textarea { min-height: 105px; resize: vertical; }
.field input:focus, .field textarea:focus, .field select:focus, .inline-input input:focus { border-color: var(--focus); background: var(--surface); }
.help-text { color: var(--muted); font-size: .87rem; }
.help-text ul { margin: .35rem 0 0; padding-left: 1.2rem; }
.error-text { color: var(--danger); font-size: .88rem; font-weight: 700; }
.field-error input, .field-error textarea, .field-error select { border-color: var(--danger); }
.form-errors { border: 1px solid color-mix(in srgb, var(--danger) 50%, var(--line)); background: var(--danger-soft); color: var(--danger); border-radius: 10px; padding: .75rem 1rem; }
.form-errors p { margin: 0; }
.inline-input { display: flex; gap: .5rem; }

.dashboard-grid { display: grid; grid-template-columns: minmax(0, 1.55fr) minmax(270px, .75fr); gap: 1rem; align-items: stretch; }
.counter-card { position: relative; overflow: hidden; border-top: 4px solid var(--accent); }
.counter-card[data-status="over"] { border-top-color: var(--danger); }
.counter-card[data-status="at"] { border-top-color: var(--warn); }
.counter-topline { display: flex; justify-content: space-between; align-items: flex-start; gap: 1rem; }
.counter-value { font-size: clamp(4rem, 12vw, 7.4rem); line-height: .95; font-weight: 850; letter-spacing: -.07em; margin: .35rem 0 1.1rem; font-variant-numeric: tabular-nums; }
.target-badge { min-width: 92px; display: grid; text-align: center; padding: .65rem .8rem; border-radius: 12px; background: var(--surface-2); }
.target-badge span { color: var(--muted); font-size: .75rem; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; }
.target-badge strong { font-size: 1.55rem; font-variant-numeric: tabular-nums; }
.progress-track { width: 100%; height: 13px; background: var(--surface-3); border-radius: 999px; overflow: hidden; }
.progress-track > span { display: block; height: 100%; border-radius: inherit; background: linear-gradient(90deg, #2c7a6b, #59aa91); transition: width .25s ease; }
.counter-card[data-status="over"] .progress-track > span { background: var(--danger); }
.counter-card[data-status="at"] .progress-track > span { background: var(--warn); }
.progress-caption { display: flex; justify-content: space-between; gap: 1rem; color: var(--muted); font-size: .9rem; margin-top: .5rem; }
.progress-caption strong { color: var(--text); }
.quick-log { display: grid; grid-template-columns: repeat(5, 1fr); gap: .55rem; margin-top: 1.5rem; }
.quick-button { min-height: 58px; border: 1px solid color-mix(in srgb, var(--accent) 35%, var(--line)); border-radius: 12px; background: var(--accent-soft); color: var(--accent); font-weight: 850; font-size: 1.1rem; cursor: pointer; transition: transform .1s ease, filter .1s ease; }
.quick-button:hover { filter: brightness(.97); transform: translateY(-1px); }
.quick-button:active { transform: scale(.98); }
.quick-button:disabled { opacity: .55; cursor: wait; }
.quick-button-undo { background: var(--surface-2); color: var(--muted); border-color: var(--line); }
.custom-log-form { margin-top: 1.2rem; }
.custom-log-form > label { display: block; font-size: .86rem; color: var(--muted); font-weight: 750; margin-bottom: .35rem; }
.custom-log-form .inline-input input { max-width: 190px; background: var(--bg); }
.adjust-feedback { min-height: 1.3em; color: var(--muted); font-size: .88rem; margin-top: .55rem; }
.adjust-feedback-error { color: var(--danger); font-weight: 700; }
.plan-snapshot { display: flex; flex-direction: column; }
.plan-snapshot .text-link { margin-top: auto; padding-top: 1rem; }
.snapshot-list { display: grid; gap: .8rem; margin: 1.2rem 0; }
.snapshot-list > div { display: flex; justify-content: space-between; align-items: baseline; gap: .75rem; border-bottom: 1px solid var(--line); padding-bottom: .65rem; }
.snapshot-list dt { color: var(--muted); }
.snapshot-list dd { margin: 0; text-align: right; font-weight: 750; }
.status-pill { display: inline-flex; align-items: center; justify-content: center; white-space: nowrap; border-radius: 999px; padding: .3rem .65rem; font-size: .75rem; font-weight: 850; }
.status-active, .status-under { color: var(--good); background: var(--good-soft); }
.status-over { color: var(--danger); background: var(--danger-soft); }
.status-at { color: var(--warn); background: var(--warn-soft); }
.status-muted { color: var(--muted); background: var(--surface-2); }

.stats-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(175px, 1fr)); gap: 1rem; margin: 1rem 0; }
.stat-card { background: var(--surface); border: 1px solid var(--line); border-radius: var(--radius-small); padding: 1.1rem 1.25rem; }
.stat-card strong { display: block; font-size: 2rem; line-height: 1.1; font-variant-numeric: tabular-nums; }
.stat-card strong small { color: var(--muted); font-size: .9rem; }
.stat-card > span:last-child { color: var(--muted); font-size: .86rem; }
.chart-card { margin-top: 1rem; }
.bar-legend { display: flex; gap: 1.2rem; justify-content: flex-end; color: var(--muted); font-size: .78rem; margin: 1rem 0 .5rem; }
.bar-legend span::before { content: ""; display: inline-block; width: 16px; height: 7px; margin-right: .35rem; border-radius: 3px; background: var(--accent); vertical-align: middle; }
.bar-legend .legend-target::before { width: 3px; height: 12px; background: var(--warn); }
.history-chart { display: grid; gap: .48rem; }
.chart-row { display: grid; grid-template-columns: 55px minmax(0, 1fr) 44px; align-items: center; gap: .7rem; font-size: .82rem; }
.chart-row time { color: var(--muted); }
.chart-track { position: relative; height: 15px; background: var(--surface-2); border-radius: 999px; overflow: visible; }
.chart-actual { display: block; height: 100%; min-width: 2px; border-radius: inherit; background: var(--accent); }
.chart-target { position: absolute; top: -3px; bottom: -3px; width: 3px; border-radius: 2px; background: var(--warn); transform: translateX(-1px); }
.chart-number { text-align: right; font-variant-numeric: tabular-nums; font-weight: 750; }
.chart-row-missing { opacity: .6; }
.adjustment-list { display: grid; margin-top: .8rem; }
.adjustment-list > div { display: grid; grid-template-columns: 52px 1fr auto; gap: .8rem; padding: .55rem 0; border-top: 1px solid var(--line); align-items: center; }
.adjustment-list > div > span:first-child, .adjustment-list > div > strong:first-child { font-weight: 850; font-variant-numeric: tabular-nums; }
.adjustment-list time { color: var(--muted); font-size: .86rem; }
.adjustment-list-full > div { grid-template-columns: 55px 1fr 90px auto; }

.plan-summary-strip { display: grid; grid-template-columns: repeat(3, 1fr); gap: 1px; background: var(--line); border: 1px solid var(--line); border-radius: var(--radius); overflow: hidden; box-shadow: var(--shadow); }
.plan-summary-strip > div { background: var(--surface); padding: 1.15rem 1.3rem; }
.plan-summary-strip span { display: block; color: var(--muted); font-size: .8rem; margin-bottom: .2rem; }
.plan-summary-strip strong { font-size: 1.35rem; }
.timeline { display: grid; gap: .8rem; }
.phase-card { display: grid; grid-template-columns: 50px 1fr; padding: 0; overflow: hidden; }
.phase-current { border-color: color-mix(in srgb, var(--accent) 50%, var(--line)); }
.phase-index { display: grid; place-items: start center; padding-top: 1.55rem; background: var(--surface-2); color: var(--muted); font-weight: 850; }
.phase-content { padding: 1.35rem 1.5rem; }
.phase-numbers { display: flex; align-items: center; gap: 1.2rem; margin: 1.2rem 0; }
.phase-numbers > div { display: grid; }
.phase-numbers strong { font-size: 2rem; line-height: 1; font-variant-numeric: tabular-nums; }
.phase-numbers span { color: var(--muted); font-size: .8rem; }
.phase-arrow { font-size: 1.35rem !important; }
.phase-duration { margin-left: auto; text-align: right; }
.timeline-gap { display: flex; align-items: center; justify-content: center; color: var(--muted); font-size: .82rem; }
.timeline-gap::before, .timeline-gap::after { content: ""; height: 1px; background: var(--line); flex: 1; }
.timeline-gap span { padding: 0 .7rem; }
.callout { border-radius: 10px; padding: .75rem .9rem; font-size: .9rem; }
.callout p { margin: .3rem 0 0; }
.callout-info { background: var(--surface-2); border-left: 4px solid var(--accent); }
.callout-warning { background: var(--warn-soft); color: var(--warn); border-left: 4px solid var(--warn); }
.danger-zone { margin-top: 2rem; padding-top: 1rem; border-top: 1px solid var(--line); text-align: right; }
.confirmation-card { text-align: center; padding-block: 2.5rem; }
.confirmation-card p { max-width: 520px; margin: .8rem auto 1.5rem; color: var(--muted); }
.confirmation-card .form-actions { justify-content: center; }
.empty-state { text-align: center; padding-block: clamp(2.4rem, 7vw, 4.2rem); }
.empty-state p { max-width: 600px; margin: .75rem auto 1.4rem; color: var(--muted); }
.empty-icon { display: grid; place-items: center; width: 56px; height: 56px; border-radius: 16px; background: var(--accent-soft); color: var(--accent); margin: 0 auto 1rem; font-size: 1.8rem; font-weight: 850; }
.hero-empty { margin-top: .5rem; }

.toolbar { display: flex; align-items: center; flex-wrap: wrap; gap: .45rem; margin-bottom: .9rem; }
.toolbar > span { color: var(--muted); margin-right: .2rem; }
.toolbar a { color: var(--muted); text-decoration: none; padding: .34rem .6rem; border-radius: 8px; font-weight: 700; }
.toolbar a[aria-current="page"] { color: var(--text); background: var(--surface-2); }
.compact-toolbar { padding: .7rem .9rem; border-radius: 12px; }
.table-card { padding: 0; overflow: hidden; }
.responsive-table { overflow-x: auto; }
table { width: 100%; border-collapse: collapse; }
th, td { padding: .85rem 1rem; border-bottom: 1px solid var(--line); text-align: left; }
th { color: var(--muted); font-size: .75rem; text-transform: uppercase; letter-spacing: .08em; background: var(--surface-2); }
tbody tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: color-mix(in srgb, var(--surface-2) 55%, transparent); }
.table-action { text-align: right; }
.muted { color: var(--muted); }

.site-footer { max-width: var(--max-width); margin: 0 auto; padding: 0 1.25rem 2.5rem; color: var(--muted); font-size: .78rem; text-align: center; }
.site-footer p { margin: 0; }

@media (max-width: 820px) {
  .nav-toggle { display: inline-flex; }
  .primary-nav:not(.auth-nav) { display: none; position: absolute; top: calc(100% + .4rem); left: 1rem; right: 1rem; padding: .65rem; background: var(--surface); border: 1px solid var(--line); border-radius: 13px; box-shadow: var(--shadow); flex-direction: column; align-items: stretch; }
  .primary-nav.nav-open { display: flex; }
  .primary-nav:not(.auth-nav) > a, .primary-nav:not(.auth-nav) .nav-link-button { width: 100%; text-align: left; }
  .dashboard-grid { grid-template-columns: 1fr; }
  .auth-layout { grid-template-columns: 1fr; min-height: auto; }
  .auth-intro { text-align: center; }
  .auth-intro p { margin-inline: auto; }
  .plan-summary-strip { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
  .page-shell { width: min(calc(100% - 1.25rem), var(--max-width)); padding-top: 1.6rem; }
  .header-inner { padding-inline: .75rem; }
  .heading-row { align-items: flex-start; flex-direction: column; }
  .heading-actions { width: 100%; }
  .heading-actions .button, .heading-actions form { flex: 1; }
  .heading-actions form .button { width: 100%; }
  .card { border-radius: 15px; padding: 1.15rem; }
  .counter-value { font-size: 4.6rem; }
  .quick-log { grid-template-columns: repeat(5, minmax(0, 1fr)); gap: .35rem; }
  .quick-button { min-height: 52px; font-size: .95rem; padding-inline: .15rem; }
  .stats-grid { grid-template-columns: 1fr; }
  .progress-caption { flex-direction: column; gap: .1rem; }
  .chart-row { grid-template-columns: 48px minmax(0, 1fr) 34px; gap: .45rem; }
  .phase-card { grid-template-columns: 38px 1fr; }
  .phase-content { padding: 1.1rem; }
  .phase-numbers { gap: .7rem; flex-wrap: wrap; }
  .phase-numbers strong { font-size: 1.6rem; }
  .phase-duration { width: 100%; margin-left: 0; text-align: left; border-top: 1px solid var(--line); padding-top: .7rem; }
  .responsive-table { overflow: visible; }
  table, thead, tbody, tr, th, td { display: block; }
  thead { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0, 0, 0, 0); }
  tbody { display: grid; }
  tbody tr { padding: .8rem 1rem; border-bottom: 1px solid var(--line); display: grid; grid-template-columns: 1fr 1fr; gap: .5rem 1rem; }
  tbody tr:last-child { border-bottom: 0; }
  td { border: 0; padding: 0; }
  td::before { content: attr(data-label); display: block; color: var(--muted); font-size: .68rem; text-transform: uppercase; letter-spacing: .08em; }
  td:first-child { grid-column: 1 / -1; }
  .table-action { grid-column: 1 / -1; text-align: left; }
  .table-action .button { width: 100%; }
  .adjustment-list-full > div { grid-template-columns: 45px 1fr; gap: .3rem .7rem; }
  .adjustment-list-full time { grid-column: 2; }
  .auth-nav > a:first-child { display: none; }
}

@media (prefers-reduced-motion: reduce) {
  *, *::before, *::after { scroll-behavior: auto !important; transition: none !important; }
}

.footer-meta { margin-top: .25rem !important; opacity: .8; }
.account-actions { flex-wrap: wrap; }
.danger-card { border-color: color-mix(in srgb, var(--danger) 42%, var(--line)); }
.button-danger { background: var(--danger); color: #fff; border-color: var(--danger); }
.button-danger:hover { filter: brightness(.94); }
.error-code { display: block; color: var(--muted); font-weight: 900; font-size: 1rem; letter-spacing: .16em; margin-bottom: .5rem; }
.error-page strong { overflow-wrap: anywhere; }
.security-note { color: var(--muted); font-size: .86rem; }