:root {
    --bg: #f4f6fb;
    --card: #fff;
    --ink: #17203a;
    --mut: #667089;
    --line: #e2e7f2;
    --accent: #3d5afe;
    --accent-ink: #fff;
    --danger: #d92d3c;
    --today: #0f9d58;
    --radius: 12px;
    --shadow: 0 1px 2px rgba(20, 30, 60, .06), 0 8px 24px rgba(20, 30, 60, .06);
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #12151f;
        --card: #1b202e;
        --ink: #e8ecf6;
        --mut: #9aa4bd;
        --line: #2b3244;
        --accent: #7c8cff;
        --accent-ink: #10131c;
        --danger: #ff6b74;
        --today: #34d399;
        --shadow: 0 1px 2px rgba(0, 0, 0, .3), 0 8px 24px rgba(0, 0, 0, .25);
    }
}

* { box-sizing: border-box; min-width: 0; }

html { overflow-x: hidden; }

body {
    margin: 0;
    background: var(--bg);
    color: var(--ink);
    font: 16px/1.5 system-ui, -apple-system, "Segoe UI", Roboto, sans-serif;
    -webkit-text-size-adjust: 100%;
    overflow-wrap: break-word;
}

a { color: var(--accent); }

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

.skip:focus {
    width: auto; height: auto;
    clip: auto; margin: 0;
    padding: .6rem 1rem;
    background: var(--accent);
    color: var(--accent-ink);
    z-index: 10;
}

:focus-visible {
    outline: 3px solid var(--accent);
    outline-offset: 2px;
}

/* ---------- shell ---------- */

.topbar {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
    align-items: center;
    justify-content: space-between;
    padding: .7rem clamp(.75rem, 4vw, 2.5rem);
    background: var(--card);
    border-bottom: 1px solid var(--line);
    position: sticky;
    top: 0;
    z-index: 5;
}

.brand {
    font-weight: 700;
    font-size: clamp(1rem, 3.6vw, 1.15rem);
    text-decoration: none;
    color: var(--ink);
    white-space: nowrap;
}

.topbar nav {
    display: flex;
    gap: .35rem;
    align-items: center;
    flex-wrap: wrap;
}

.topbar nav a {
    text-decoration: none;
    padding: .5rem .8rem;
    border-radius: 8px;
    color: var(--mut);
    font-weight: 600;
}

.topbar nav a[aria-current="page"] { color: var(--ink); background: var(--bg); }

.wrap {
    max-width: 900px;
    margin: 0 auto;
    padding: clamp(1rem, 4vw, 2rem) clamp(1rem, 4vw, 2rem) 4rem;
}

.foot {
    text-align: center;
    color: var(--mut);
    font-size: .8rem;
    padding: 0 1rem 2rem;
}

.foot code { background: var(--card); padding: .1rem .35rem; border-radius: 5px; }

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

.btn, .nav-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: .4rem;
    min-height: 44px;
    padding: .55rem clamp(.7rem, 2.5vw, 1.1rem);
    white-space: nowrap;
    border: 1px solid transparent;
    border-radius: 10px;
    background: var(--accent);
    color: var(--accent-ink) !important;
    font: inherit;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
}

.btn.ghost {
    background: var(--card);
    color: var(--ink) !important;
    border-color: var(--line);
}

.btn.danger { background: var(--danger); color: #fff !important; margin-left: auto; }
.btn.sm { min-height: 36px; padding: .3rem .7rem; font-size: .85rem; }
.btn:hover { filter: brightness(1.06); }

.nav-btn {
    background: var(--card);
    color: var(--ink) !important;
    border-color: var(--line);
    flex: 0 0 44px;
    width: 44px;
    padding: 0;
    font-size: 1.4rem;
    line-height: 1;
}

/* ---------- month toolbar ---------- */

.toolbar {
    display: flex;
    flex-wrap: wrap;
    gap: .5rem;
    align-items: center;
    margin-bottom: 1.25rem;
}

.monthpick { display: flex; gap: .4rem; flex: 1 1 120px; min-width: 0; }
.monthpick input { flex: 1 1 auto; min-width: 0; }

.head { margin-bottom: 1rem; }
.head h1 { margin: 0; font-size: clamp(1.4rem, 5vw, 1.9rem); }
.count { margin: .2rem 0 0; color: var(--mut); font-size: .9rem; }

.empty {
    background: var(--card);
    border: 1px dashed var(--line);
    border-radius: var(--radius);
    padding: 2rem 1.25rem;
    text-align: center;
    color: var(--mut);
}

/* ---------- day list ---------- */

.days { list-style: none; margin: 0; padding: 0; display: grid; gap: .75rem; }

.day {
    display: grid;
    grid-template-columns: 54px minmax(0, 1fr);
    gap: .75rem;
    background: var(--card);
    border: 1px solid var(--line);
    border-left: 4px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: .9rem;
}

.day.is-today { border-left-color: var(--today); }
.day.is-past { opacity: .62; }

.date {
    text-align: center;
    background: var(--bg);
    border-radius: 10px;
    padding: .45rem .2rem;
    align-self: start;
}

.date b { display: block; font-size: 1.35rem; line-height: 1.1; }
.date span { font-size: .7rem; text-transform: uppercase; letter-spacing: .06em; color: var(--mut); }
.is-today .date { background: var(--today); color: #fff; }
.is-today .date span { color: #fff; }

.items { list-style: none; margin: 0; padding: 0; display: grid; gap: .7rem; min-width: 0; }
.items .item + .item { border-top: 1px solid var(--line); padding-top: .7rem; }

.item .title {
    font-weight: 650;
    text-decoration: none;
    color: var(--ink);
    display: inline-block;
    overflow-wrap: anywhere;
}

.item .title:hover { color: var(--accent); text-decoration: underline; }

.meta {
    display: flex;
    flex-wrap: wrap;
    gap: .4rem .6rem;
    align-items: center;
    margin-top: .25rem;
}

.notes { margin: .4rem 0 0; color: var(--mut); font-size: .88rem; }

.tag {
    font-size: .7rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: .05em;
    padding: .18rem .5rem;
    border-radius: 999px;
    background: var(--bg);
    border: 1px solid var(--line);
    color: var(--mut);
    white-space: nowrap;
}

.tag-daily     { border-color: #f0a; color: #c0187f; }
.tag-weekly    { border-color: #09c; color: #0a7ea4; }
.tag-monthly   { border-color: #6a5acd; color: #5a4ac0; }
.tag-bimonthly { border-color: #e08b00; color: #b06e00; }
.tag-yearly    { border-color: #0a9; color: #068a72; }

@media (prefers-color-scheme: dark) {
    .tag-daily     { color: #ff8ad0; }
    .tag-weekly    { color: #7fd4f0; }
    .tag-monthly   { color: #b0a6ff; }
    .tag-bimonthly { color: #ffc466; }
    .tag-yearly    { color: #6fe3cc; }
}

/* ---------- form ---------- */

.card {
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: clamp(1rem, 4vw, 1.5rem);
}

.form { display: grid; gap: 1.05rem; }

.field { display: grid; gap: .35rem; }
.field label { font-weight: 600; font-size: .92rem; }
.req { color: var(--danger); }
.field small { color: var(--mut); font-size: .8rem; }

input, select, textarea {
    width: 100%;
    min-height: 44px;
    padding: .6rem .7rem;
    font: inherit;
    color: var(--ink);
    background: var(--bg);
    border: 1px solid var(--line);
    border-radius: 10px;
}

textarea { min-height: 90px; resize: vertical; }
input:focus, select:focus, textarea:focus { border-color: var(--accent); }

.actions { display: flex; flex-wrap: wrap; gap: .6rem; align-items: center; }

.alert {
    background: color-mix(in srgb, var(--danger) 12%, var(--card));
    border: 1px solid var(--danger);
    border-radius: var(--radius);
    padding: .8rem 1rem;
    margin-bottom: 1rem;
}

.alert ul { margin: 0; padding-left: 1.2rem; }

/* ---------- all reminders table ---------- */

.allbox {
    margin-top: 2rem;
    background: var(--card);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: .5rem 1rem 1rem;
}

.allbox summary { cursor: pointer; font-weight: 600; padding: .55rem 0; }
.tablewrap { overflow-x: auto; }

table { width: 100%; border-collapse: collapse; font-size: .9rem; }
th, td { text-align: left; padding: .6rem .5rem; border-bottom: 1px solid var(--line); }
th { color: var(--mut); font-size: .75rem; text-transform: uppercase; letter-spacing: .05em; }

@media (max-width: 620px) {
    table, thead, tbody, tr, td { display: block; width: 100%; }
    thead { display: none; }
    tr { border: 1px solid var(--line); border-radius: 10px; margin-bottom: .7rem; padding: .3rem .6rem; }
    td { border: 0; padding: .3rem 0; display: flex; justify-content: space-between; gap: 1rem; }
    td::before { content: attr(data-l); color: var(--mut); font-size: .75rem; text-transform: uppercase; letter-spacing: .05em; }
}