/* ============================================================================
   CalendarSync — one stylesheet, no framework, no external requests.
   Served from /assets so the Content-Security-Policy can stay strict.
   ========================================================================= */

:root {
    --bg: #f6f7f9;
    --surface: #ffffff;
    --surface-2: #f0f2f5;
    --border: #dfe3e8;
    --text: #1c2024;
    --text-muted: #667085;
    --accent: #2f5fe0;
    --accent-dark: #234ab8;
    --ok: #127a4a;
    --ok-bg: #e6f5ed;
    --warn: #8a5300;
    --warn-bg: #fdf3e2;
    --bad: #a4232b;
    --bad-bg: #fdeceb;
    --info: #1e5c8a;
    --info-bg: #e8f2fa;
    --radius: 10px;
    --radius-sm: 6px;
    --shadow: 0 1px 2px rgba(16, 24, 40, .05), 0 1px 3px rgba(16, 24, 40, .07);
    --mono: ui-monospace, SFMono-Regular, "SF Mono", Menlo, Consolas, monospace;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #14171a;
        --surface: #1c2024;
        --surface-2: #23282d;
        --border: #313841;
        --text: #e8eaed;
        --text-muted: #9aa4b0;
        --accent: #6f95ff;
        --accent-dark: #8aa9ff;
        --ok: #7fd3a3;
        --ok-bg: #16311f;
        --warn: #f0c274;
        --warn-bg: #33280f;
        --bad: #f09a9a;
        --bad-bg: #3a1c1c;
        --info: #8cc0e8;
        --info-bg: #16293a;
        --shadow: 0 1px 2px rgba(0, 0, 0, .4);
    }
}

* { box-sizing: border-box; }

html { -webkit-text-size-adjust: 100%; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font: 15px/1.55 system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
}

a { color: var(--accent); text-decoration: none; }
a:hover { text-decoration: underline; }

h1 { font-size: 1.55rem; margin: 0 0 .25rem; letter-spacing: -.01em; }
h2 { font-size: 1.15rem; margin: 0 0 .5rem; }
h3 { font-size: 1rem; margin: 0 0 .5rem; }

p { margin: 0 0 .75rem; }

code {
    font-family: var(--mono);
    font-size: .88em;
    background: var(--surface-2);
    padding: .1em .35em;
    border-radius: 4px;
    word-break: break-word;
}

.skip-link {
    position: absolute; left: -9999px; top: 0;
    background: var(--accent); color: #fff; padding: .5rem .75rem; z-index: 100;
}
.skip-link:focus { left: 0; }

/* ------------------------------------------------------------------ topbar */

.topbar {
    background: var(--surface);
    border-bottom: 1px solid var(--border);
    position: sticky; top: 0; z-index: 20;
}
.topbar-inner {
    max-width: 1180px; margin: 0 auto; padding: .6rem 1rem;
    display: flex; align-items: center; gap: 1.25rem; flex-wrap: wrap;
}
.brand { display: inline-flex; align-items: center; gap: .5rem; color: var(--text); font-weight: 650; }
.brand:hover { text-decoration: none; }
.brand-mark {
    display: inline-grid; place-items: center;
    width: 26px; height: 26px; border-radius: 7px;
    background: var(--accent); color: #fff; font-size: 15px;
}
.brand-centered { justify-content: center; margin-bottom: 1rem; }

.nav { display: flex; gap: .25rem; flex-wrap: wrap; flex: 1; }
.nav-link {
    color: var(--text-muted); padding: .35rem .6rem; border-radius: var(--radius-sm);
    font-weight: 500; display: inline-flex; align-items: center; gap: .35rem;
}
.nav-link:hover { background: var(--surface-2); color: var(--text); text-decoration: none; }
.nav-link.is-active { color: var(--accent); background: var(--surface-2); }

.topbar-right { display: flex; align-items: center; gap: .75rem; }
.who { color: var(--text-muted); font-size: .9rem; }

/* ------------------------------------------------------------------ layout */

.page { max-width: 1180px; margin: 0 auto; padding: 1.5rem 1rem 3rem; }

.page-head {
    display: flex; justify-content: space-between; align-items: flex-start;
    gap: 1rem; flex-wrap: wrap; margin-bottom: 1.25rem;
}
.page-head-actions { display: flex; gap: .5rem; flex-wrap: wrap; align-items: center; }

.section-title { margin: 2rem 0 .75rem; }

.muted { color: var(--text-muted); }
.small { font-size: .875rem; }
.right { text-align: right; }
.nowrap { white-space: nowrap; }
.inline { display: inline; }
.arrow { color: var(--text-muted); margin: 0 .25rem; }
.prewrap { white-space: pre-wrap; }
.error-text { color: var(--bad); word-break: break-word; }
.hint { cursor: help; border-bottom: 1px dotted var(--text-muted); }

.footer {
    max-width: 1180px; margin: 0 auto; padding: 1.5rem 1rem 2.5rem;
    color: var(--text-muted); font-size: .85rem;
    display: flex; gap: .5rem; flex-wrap: wrap; align-items: center;
}
.footer-sep { opacity: .5; }

/* ------------------------------------------------------------------ banners */

.banner {
    padding: .7rem 1rem; font-size: .9rem; text-align: center;
    border-bottom: 1px solid var(--border);
}
.banner-test { background: var(--warn-bg); color: var(--warn); }

.flashes { margin-bottom: 1rem; display: grid; gap: .5rem; }
.flash {
    padding: .7rem .9rem; border-radius: var(--radius-sm);
    border: 1px solid transparent; font-size: .92rem;
}
.flash-success { background: var(--ok-bg); color: var(--ok); border-color: currentColor; }
.flash-error   { background: var(--bad-bg); color: var(--bad); border-color: currentColor; }
.flash-warning { background: var(--warn-bg); color: var(--warn); border-color: currentColor; }
.flash-info    { background: var(--info-bg); color: var(--info); border-color: currentColor; }

.callout {
    padding: .85rem 1rem; border-radius: var(--radius); margin-bottom: 1.25rem;
    background: var(--surface); border: 1px solid var(--border); border-left-width: 3px;
}
.callout h2 { font-size: 1rem; }
.callout-warn { border-left-color: var(--warn); background: var(--warn-bg); }
.callout-info { border-left-color: var(--info); background: var(--info-bg); }
.callout ul { margin: .25rem 0 0; padding-left: 1.1rem; }

/* -------------------------------------------------------------------- pills */

.pill {
    display: inline-block; font-size: .74rem; font-weight: 600;
    padding: .1rem .45rem; border-radius: 999px; line-height: 1.5;
    background: var(--surface-2); color: var(--text-muted); white-space: nowrap;
}
.pill-ok    { background: var(--ok-bg); color: var(--ok); }
.pill-warn  { background: var(--warn-bg); color: var(--warn); }
.pill-bad   { background: var(--bad-bg); color: var(--bad); }
.pill-info  { background: var(--info-bg); color: var(--info); }
.pill-muted { background: var(--surface-2); color: var(--text-muted); }

/* ------------------------------------------------------------------ buttons */

.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: .35rem;
    padding: .5rem .85rem; border-radius: var(--radius-sm);
    border: 1px solid var(--border); background: var(--surface); color: var(--text);
    font: inherit; font-weight: 550; cursor: pointer; text-decoration: none;
    transition: background .12s ease, border-color .12s ease;
}
.btn:hover { background: var(--surface-2); text-decoration: none; }
.btn:focus-visible { outline: 2px solid var(--accent); outline-offset: 2px; }
.btn:disabled { opacity: .55; cursor: not-allowed; }
.btn-primary { background: var(--accent); border-color: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); border-color: var(--accent-dark); }
.btn-danger { background: transparent; border-color: var(--bad); color: var(--bad); }
.btn-danger:hover { background: var(--bad-bg); }
.btn-ghost { background: transparent; }
.btn-link {
    background: none; border: none; color: var(--accent);
    padding: 0; cursor: pointer; font: inherit; text-decoration: underline;
}
.btn-sm { padding: .3rem .6rem; font-size: .85rem; }
.btn-lg { padding: .65rem 1.2rem; font-size: 1rem; }
.btn-block { width: 100%; }

/* ------------------------------------------------------------------- forms */

.form { display: grid; gap: 1rem; }
.field { display: grid; gap: .3rem; }
.field-label { font-weight: 550; font-size: .92rem; }
.field-help { color: var(--text-muted); font-size: .82rem; }
.field-row { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; }
.field-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(220px, 1fr)); gap: 1rem; }

.input {
    width: 100%; padding: .5rem .65rem; font: inherit;
    border: 1px solid var(--border); border-radius: var(--radius-sm);
    background: var(--surface); color: var(--text);
}
.input:focus { outline: 2px solid var(--accent); outline-offset: -1px; border-color: var(--accent); }
.input:disabled { background: var(--surface-2); color: var(--text-muted); }
.input-code {
    font-family: var(--mono); font-size: 1.4rem; letter-spacing: .35em;
    text-align: center; padding: .7rem;
}

.fieldset { border: 1px solid var(--border); border-radius: var(--radius-sm); padding: .75rem 1rem; margin: .5rem 0 0; }
.fieldset legend { font-weight: 550; font-size: .9rem; padding: 0 .35rem; }

.check { display: flex; gap: .55rem; align-items: flex-start; font-size: .92rem; }
.check input { margin-top: .25rem; flex: none; }

.form-actions { display: flex; gap: .75rem; align-items: center; flex-wrap: wrap; margin-top: .5rem; }
.form-inline-centered { justify-items: center; margin-top: .75rem; }

.radio-cards { display: grid; gap: .6rem; }
.radio-card {
    display: flex; gap: .7rem; align-items: flex-start; cursor: pointer;
    border: 1px solid var(--border); border-radius: var(--radius-sm);
    padding: .8rem .9rem; background: var(--surface);
}
.radio-card:hover { border-color: var(--accent); }
.radio-card input { margin-top: .2rem; flex: none; }
.radio-card:has(input:checked) { border-color: var(--accent); background: var(--info-bg); }
.radio-card-body { display: grid; gap: .15rem; }
.radio-card-title { font-weight: 600; }
.radio-card-desc { color: var(--text-muted); font-size: .875rem; }

/* ------------------------------------------------------------------ panels */

.panel {
    background: var(--surface); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 1.1rem 1.25rem; margin-bottom: 1.25rem;
    box-shadow: var(--shadow);
}
.panel-head { display: flex; justify-content: space-between; align-items: baseline; gap: 1rem; flex-wrap: wrap; }
.panel-head h2 { margin: 0; }
.panel-note { background: var(--surface-2); }
.panel-danger { border-color: var(--bad); }
.link-form .panel { margin-bottom: 1.5rem; }

.split { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 1.25rem; align-items: start; }

.empty-state {
    background: var(--surface); border: 1px dashed var(--border); border-radius: var(--radius);
    padding: 2.25rem 1.25rem; text-align: center; margin-bottom: 1.25rem;
}
.empty-state p { max-width: 46rem; margin: .5rem auto 1rem; color: var(--text-muted); }
.empty-actions { display: flex; gap: .5rem; justify-content: center; flex-wrap: wrap; }

/* ------------------------------------------------------------------- stats */

.stat-grid {
    display: grid; grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: .75rem; margin-bottom: 1.25rem;
}
.stat {
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
    padding: .8rem .9rem; display: grid; gap: .1rem;
}
.stat-value { font-size: 1.5rem; font-weight: 650; line-height: 1.15; }
.stat-label { color: var(--text-muted); font-size: .82rem; }

/* ------------------------------------------------------------------ tables */

.table-wrap { overflow-x: auto; margin: 0 -.25rem; }
.table { width: 100%; border-collapse: collapse; font-size: .92rem; }
.table th, .table td { padding: .55rem .6rem; text-align: left; border-bottom: 1px solid var(--border); vertical-align: top; }
.table th { font-size: .78rem; text-transform: uppercase; letter-spacing: .04em; color: var(--text-muted); font-weight: 600; }
.table tbody tr:last-child td { border-bottom: none; }
.table tbody tr:hover { background: var(--surface-2); }
.table-compact th, .table-compact td { padding: .4rem .5rem; font-size: .87rem; }

.fact-list { display: grid; gap: .4rem; margin: 0; }
.fact-list > div { display: grid; grid-template-columns: 11rem 1fr; gap: .75rem; align-items: baseline; }
.fact-list dt { color: var(--text-muted); font-size: .88rem; }
.fact-list dd { margin: 0; }
.fact-list-tight > div { grid-template-columns: 6rem 1fr; }

.plain-list { margin: 0 0 1rem; padding-left: 1.1rem; }
.plain-list li { margin-bottom: .25rem; }

.swatch { display: inline-block; width: .7rem; height: .7rem; border-radius: 3px; margin-right: .35rem; vertical-align: baseline; }

/* ------------------------------------------------------------- link cards */

.link-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(340px, 1fr)); gap: 1rem; }
.link-card {
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 1rem; display: grid; gap: .85rem; box-shadow: var(--shadow);
}
.link-card.is-paused { opacity: .75; }
.link-card-head { display: flex; justify-content: space-between; gap: .75rem; align-items: flex-start; flex-wrap: wrap; }
.link-card-head h2 { margin: 0; font-size: 1.05rem; }
.link-card-pills { display: flex; gap: .3rem; flex-wrap: wrap; }

.link-flow {
    display: grid; grid-template-columns: 1fr auto 1fr; gap: .5rem; align-items: center;
    background: var(--surface-2); border-radius: var(--radius-sm); padding: .6rem .7rem;
}
.flow-side { display: grid; gap: .1rem; min-width: 0; }
.flow-side:last-child { text-align: right; }
.flow-role { font-size: .7rem; text-transform: uppercase; letter-spacing: .05em; color: var(--text-muted); }
.flow-cal { font-weight: 600; font-size: .9rem; overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.flow-acct { font-size: .78rem; color: var(--text-muted); overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.flow-arrow { font-size: 1.2rem; color: var(--accent); }

.link-facts { display: grid; grid-template-columns: 1fr 1fr; gap: .4rem .9rem; margin: 0; }
.link-facts > div { min-width: 0; }
.link-facts dt { font-size: .72rem; text-transform: uppercase; letter-spacing: .04em; color: var(--text-muted); }
.link-facts dd { margin: 0; font-size: .87rem; }

.link-card-foot { display: flex; gap: .4rem; flex-wrap: wrap; align-items: center; border-top: 1px solid var(--border); padding-top: .75rem; }

/* -------------------------------------------------------------- conflicts */

.conflict-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 1rem; margin-bottom: 1rem; }
.conflict-side { border: 1px solid var(--border); border-radius: var(--radius-sm); padding: .8rem; display: grid; gap: .75rem; }
.conflict-side h3 { display: flex; gap: .4rem; align-items: center; flex-wrap: wrap; }
.conflict-foot { display: flex; gap: .6rem; align-items: center; flex-wrap: wrap; border-top: 1px solid var(--border); padding-top: .75rem; }

/* -------------------------------------------------------------- run log */

.run-log { list-style: none; margin: 0; padding: 0; display: grid; gap: .2rem; }
.run-log-item {
    display: grid; grid-template-columns: 4.5rem 4.5rem 1fr; gap: .6rem;
    padding: .35rem .5rem; border-radius: 4px; font-size: .87rem; align-items: baseline;
}
.run-log-item + .run-log-item { border-top: 1px solid var(--border); }
.run-log-time { font-family: var(--mono); font-size: .8rem; color: var(--text-muted); }
.run-log-level { font-size: .72rem; text-transform: uppercase; letter-spacing: .04em; font-weight: 650; }
.level-debug .run-log-level { color: var(--text-muted); }
.level-info .run-log-level { color: var(--info); }
.level-warning .run-log-level { color: var(--warn); }
.level-error .run-log-level { color: var(--bad); }
.run-log-context { grid-column: 3; font-family: var(--mono); font-size: .78rem; color: var(--text-muted); }
.level-warning { background: var(--warn-bg); }
.level-error { background: var(--bad-bg); }

/* ------------------------------------------------------------- connect grid */

.connect-grid { display: grid; grid-template-columns: repeat(auto-fit, minmax(230px, 1fr)); gap: 1rem; margin-bottom: 1.5rem; }
.connect-card {
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
    padding: 1rem; display: grid; gap: .5rem; align-content: start;
}
.connect-card h2 { font-size: 1rem; margin: 0; }
.account-block { padding-bottom: .5rem; }

.steps { padding-left: 1.2rem; display: grid; gap: .5rem; margin: 0; }
.steps-compact { gap: .3rem; font-size: .9rem; }

/* --------------------------------------------------------------- marketing */

.hero { max-width: 46rem; margin: 0 auto; padding: 4rem 1rem 2rem; text-align: center; }
.hero h1 { font-size: clamp(1.9rem, 4.5vw, 2.9rem); line-height: 1.15; margin-bottom: 1rem; }
.lede { font-size: 1.1rem; color: var(--text-muted); }
.hero-actions { display: flex; gap: .75rem; justify-content: center; flex-wrap: wrap; margin: 1.5rem 0; }
.hero-note { font-size: .9rem; color: var(--text-muted); }

.features { max-width: 62rem; margin: 2rem auto; padding: 0 1rem; display: grid; grid-template-columns: repeat(auto-fit, minmax(280px, 1fr)); gap: 1.25rem; }
.feature { background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius); padding: 1.25rem; }
.feature-list { list-style: none; margin: .75rem 0 0; padding: 0; display: grid; gap: .35rem; font-size: .9rem; }
.safety { max-width: 46rem; margin: 3rem auto 4rem; padding: 0 1rem; text-align: center; }
.safety .steps { text-align: left; }

/* -------------------------------------------------------------- auth pages */

.auth-body { display: grid; place-items: center; min-height: 100vh; padding: 1.5rem 1rem; }
.auth-card {
    width: 100%; max-width: 27rem; background: var(--surface);
    border: 1px solid var(--border); border-radius: var(--radius);
    padding: 1.75rem; box-shadow: var(--shadow);
}
.auth-title { font-size: 1.35rem; margin-bottom: .35rem; }
.auth-sub { color: var(--text-muted); font-size: .93rem; }
.auth-foot { margin-top: 1.25rem; font-size: .87rem; color: var(--text-muted); text-align: center; }
.auth-card .banner { border-radius: var(--radius-sm); border: 1px solid currentColor; margin-bottom: 1rem; }
.auth-card .flashes { margin-bottom: 1rem; }

/* ------------------------------------------------------------- responsive */

@media (max-width: 820px) {
    .split, .field-row, .conflict-grid { grid-template-columns: 1fr; }
    .link-facts { grid-template-columns: 1fr; }
    .fact-list > div { grid-template-columns: 1fr; gap: 0; }
    .fact-list dt { margin-top: .35rem; }
    .topbar-inner { gap: .75rem; }
    .nav { order: 3; width: 100%; }
    .run-log-item { grid-template-columns: 3.5rem 1fr; }
    .run-log-context { grid-column: 2; }
}