:root, [data-theme="light"] {
  --bg: #f5f5f7;
  --bg-glow-1: rgba(0, 113, 227, .06);
  --bg-glow-2: rgba(175, 82, 222, .05);
  --card: #ffffff;
  --card-glass: rgba(255, 255, 255, .72);
  --line: rgba(0, 0, 0, .08);
  --line-2: rgba(0, 0, 0, .14);
  --ink: #1d1d1f;
  --ink-2: #515154;
  --ink-3: #86868b;
  --accent: #0071e3;
  --accent-2: #2b8ef0;
  --accent-soft: rgba(0, 113, 227, .1);
  --green: #1db954;
  --green-ink: #157f3c;
  --green-bg: rgba(29, 185, 84, .12);
  --red: #e0342c;
  --red-bg: rgba(224, 52, 44, .1);
  --amber-ink: #8a6116;
  --amber-bg: rgba(255, 184, 0, .16);
  --field: #ffffff;
  --shadow: 0 2px 6px rgba(0,0,0,.04), 0 18px 40px -20px rgba(0,0,0,.12);
  --shadow-hover: 0 4px 10px rgba(0,0,0,.05), 0 28px 56px -24px rgba(0,0,0,.2);
}
[data-theme="dark"] {
  --bg: #000000;
  --bg-glow-1: rgba(0, 113, 227, .12);
  --bg-glow-2: rgba(175, 82, 222, .10);
  --card: #1c1c1e;
  --card-glass: rgba(22, 22, 24, .72);
  --line: rgba(255, 255, 255, .1);
  --line-2: rgba(255, 255, 255, .18);
  --ink: #f5f5f7;
  --ink-2: #b9b9be;
  --ink-3: #86868b;
  --accent: #2997ff;
  --accent-2: #64b2ff;
  --accent-soft: rgba(41, 151, 255, .14);
  --green: #30d158;
  --green-ink: #4cd964;
  --green-bg: rgba(48, 209, 88, .16);
  --red: #ff6961;
  --red-bg: rgba(255, 105, 97, .12);
  --amber-ink: #ffd60a;
  --amber-bg: rgba(255, 214, 10, .14);
  --field: #2c2c2e;
  --shadow: 0 2px 8px rgba(0,0,0,.5), 0 20px 44px -20px rgba(0,0,0,.7);
  --shadow-hover: 0 4px 12px rgba(0,0,0,.55), 0 30px 60px -24px rgba(0,0,0,.8);
}

* { box-sizing: border-box; margin: 0; }
html { scroll-behavior: smooth; }
body {
  font-family: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  background:
    radial-gradient(1100px 520px at 78% -120px, var(--bg-glow-1), transparent 62%),
    radial-gradient(900px 460px at 8% -80px, var(--bg-glow-2), transparent 58%),
    var(--bg);
  color: var(--ink);
  line-height: 1.55;
  min-height: 100vh;
  letter-spacing: -.011em;
  transition: background .3s, color .3s;
}

nav {
  position: sticky; top: 0; z-index: 50;
  display: flex; justify-content: space-between; align-items: center; gap: 10px;
  padding: 12px 28px;
  background: var(--card-glass);
  backdrop-filter: saturate(180%) blur(20px);
  -webkit-backdrop-filter: saturate(180%) blur(20px);
  border-bottom: 1px solid var(--line);
  flex-wrap: wrap;
}
.brand { font-weight: 700; font-size: 1.12rem; letter-spacing: -.02em; text-decoration: none; color: var(--ink); }
.nav-links { display: flex; gap: 2px; align-items: center; flex-wrap: wrap; }
.nav-links a {
  text-decoration: none; color: var(--ink-2); font-size: .88rem; font-weight: 500;
  padding: 7px 11px; border-radius: 999px; transition: all .18s;
}
.nav-links a:hover { background: var(--accent-soft); color: var(--accent); }
.nav-sep { width: 1px; height: 18px; background: var(--line-2); margin: 0 6px; }
.nav-drop { position: relative; }
.nav-drop summary {
  list-style: none; cursor: pointer;
  color: var(--ink-2); font-size: .88rem; font-weight: 500;
  padding: 7px 12px; border-radius: 999px; transition: all .18s;
  border: 1px solid var(--line-2);
}
.nav-drop summary::-webkit-details-marker { display: none; }
.nav-drop summary:hover, .nav-drop[open] summary { background: var(--accent-soft); color: var(--accent); border-color: var(--accent); }
.nav-drop .menu {
  position: absolute; right: 0; top: calc(100% + 8px);
  background: var(--card); border: 1px solid var(--line); border-radius: 14px;
  box-shadow: var(--shadow-hover); padding: 8px; min-width: 190px; z-index: 100;
  display: flex; flex-direction: column; gap: 2px;
}
.nav-drop .menu a { display: block; padding: 9px 14px; border-radius: 9px; }
.nav-badge {
  position: absolute; top: -4px; right: -2px;
  background: #ff3b30; color: #fff;
  min-width: 17px; height: 17px; border-radius: 999px;
  font-size: .68rem; font-weight: 700; line-height: 17px; text-align: center;
  padding: 0 4px;
}
.theme-btn {
  background: none; border: 1px solid var(--line-2); color: var(--ink-2);
  width: 34px; height: 34px; border-radius: 50%; cursor: pointer; font-size: 1rem;
  display: inline-flex; align-items: center; justify-content: center; margin-left: 8px;
  transition: all .2s;
}
.theme-btn:hover { border-color: var(--accent); color: var(--accent); transform: rotate(20deg); }

main { max-width: 920px; margin: 0 auto; padding: 36px 20px 90px; }
h1 { margin: 14px 0 22px; font-size: 2.1rem; font-weight: 700; letter-spacing: -.03em; }
h2 { margin-bottom: 12px; font-weight: 700; letter-spacing: -.02em; font-size: 1.3rem; }
h3 { font-weight: 600; letter-spacing: -.01em; }

.card {
  background: var(--card);
  border: 1px solid var(--line);
  border-radius: 20px;
  padding: 26px 28px;
  margin-bottom: 18px;
  box-shadow: var(--shadow);
  transition: box-shadow .25s, transform .25s, background .3s;
}

.hero { text-align: center; padding: 72px 0 30px; }
.hero h1 {
  font-size: 3.3rem; font-weight: 800; line-height: 1.07; letter-spacing: -.04em; margin-bottom: 0;
  background: linear-gradient(120deg, var(--ink) 40%, var(--accent) 80%, #af52de);
  -webkit-background-clip: text; background-clip: text; -webkit-text-fill-color: transparent;
}
.hero p { color: var(--ink-2); max-width: 580px; margin: 18px auto 0; font-size: 1.18rem; font-weight: 400; }

.pricing { display: flex; gap: 18px; justify-content: center; flex-wrap: wrap; padding: 30px 0; }
.price-card { width: 252px; text-align: center; position: relative; }
.price-card:hover { transform: translateY(-5px); box-shadow: var(--shadow-hover); }
.price-card.highlight { border: 2px solid var(--accent); }
.price-card h2 { font-size: .95rem; font-weight: 600; text-transform: uppercase; letter-spacing: .1em; color: var(--ink-3); }
.badge {
  position: absolute; top: -13px; left: 50%; transform: translateX(-50%);
  background: linear-gradient(90deg, var(--accent), #af52de);
  color: #fff; padding: 4px 15px; border-radius: 999px; font-size: .76rem; font-weight: 600; white-space: nowrap;
}
.price { font-size: 2.3rem; font-weight: 800; letter-spacing: -.04em; margin: 12px 0 4px; }
.price span { font-size: .88rem; font-weight: 500; color: var(--ink-3); letter-spacing: 0; }
.price-card p { color: var(--ink-2); font-size: .93rem; margin-bottom: 16px; }

.btn {
  display: inline-block;
  background: var(--accent);
  color: #fff; border: none; padding: 11px 22px; border-radius: 999px;
  font-size: .95rem; font-weight: 600; cursor: pointer; text-decoration: none;
  font-family: inherit; letter-spacing: -.01em;
  transition: all .2s;
  box-shadow: 0 6px 18px -8px var(--accent);
}
.btn:hover { background: var(--accent-2); transform: translateY(-1px); box-shadow: 0 10px 24px -8px var(--accent); }
.btn:active { transform: scale(.98); }
.btn-alt { background: var(--green); box-shadow: 0 6px 18px -8px var(--green); }
.btn-alt:hover { filter: brightness(1.08); background: var(--green); }
.btn-ghost { background: transparent; color: var(--accent); border: 1px solid var(--line-2); box-shadow: none; }
.btn-ghost:hover { background: var(--accent-soft); border-color: var(--accent); transform: none; box-shadow: none; }
.btn-danger { background: transparent; color: var(--red); border: 1px solid var(--line-2); box-shadow: none; }
.btn-danger:hover { background: var(--red-bg); border-color: var(--red); transform: none; box-shadow: none; }
.btn-sm { padding: 7px 14px; font-size: .84rem; }
.link-btn { background: none; border: none; color: var(--accent); cursor: pointer; text-decoration: none; font-size: .9rem; margin-left: 8px; font-family: inherit; font-weight: 500; }
.link-btn:hover { text-decoration: underline; }

.form-card { max-width: 430px; margin: 40px auto; }
label { display: block; margin-bottom: 14px; font-size: .86rem; font-weight: 500; color: var(--ink-2); }
input, textarea, select {
  width: 100%; padding: 11px 14px; margin-top: 6px;
  border: 1px solid var(--line-2); border-radius: 12px;
  font-size: .97rem; font-family: inherit; background: var(--field); color: var(--ink);
  transition: border-color .18s, box-shadow .18s;
  -webkit-appearance: none; appearance: none;
}
select {
  background-image: url("data:image/svg+xml;charset=utf-8,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%2386868b' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");
  background-repeat: no-repeat; background-position: right 14px center; padding-right: 36px;
}
input:focus, textarea:focus, select:focus {
  outline: none; border-color: var(--accent);
  box-shadow: 0 0 0 4px var(--accent-soft);
}
.row { display: flex; gap: 14px; flex-wrap: wrap; } .row label { flex: 1; min-width: 140px; }

.alert { padding: 13px 18px; border-radius: 14px; margin-bottom: 18px; font-size: .94rem; font-weight: 500; }
.alert.ok { background: var(--green-bg); color: var(--green-ink); }
.alert.bad { background: var(--red-bg); color: var(--red); }

.meeting { display: flex; justify-content: space-between; align-items: center; gap: 16px; flex-wrap: wrap; }
.when { color: var(--ink-2); margin: 5px 0; font-size: .93rem; }
.pw { font-size: .9rem; }
.pw code { background: var(--accent-soft); padding: 2px 9px; border-radius: 8px; color: var(--accent); font-weight: 600; }
.small { font-size: .84rem; word-break: break-all; color: var(--ink-3); }
.small a { color: var(--accent); text-decoration: none; }
.actions { display: flex; gap: 8px; align-items: center; flex-wrap: wrap; }
.hint { color: var(--ink-2); font-size: .92rem; margin-bottom: 12px; }
.hint code { color: var(--accent); background: var(--accent-soft); padding: 1px 7px; border-radius: 6px; }
.sub-info {
  background: var(--accent-soft);
  border-radius: 14px;
  padding: 12px 16px; margin-bottom: 18px; font-size: .94rem;
}
.plan-buttons { display: flex; gap: 12px; flex-wrap: wrap; margin-top: 12px; }

table { width: 100%; border-collapse: collapse; font-size: .91rem; }
th { text-align: left; padding: 10px 12px; color: var(--ink-3); font-size: .74rem; text-transform: uppercase; letter-spacing: .08em; font-weight: 600; border-bottom: 1px solid var(--line-2); }
td { text-align: left; padding: 12px; border-bottom: 1px solid var(--line); }
.tag { display: inline-block; background: var(--bg); color: var(--ink-2); padding: 3px 12px; border-radius: 999px; font-size: .76rem; font-weight: 600; vertical-align: middle; }
.tag.ok { background: var(--green-bg); color: var(--green-ink); }
.tag.warn { background: var(--amber-bg); color: var(--amber-ink); }
.tag.bad { background: var(--red-bg); color: var(--red); }

footer { text-align: center; color: var(--ink-3); font-size: .84rem; padding: 28px; }

.cal-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 12px; }
.cal-head strong { font-size: 1.1rem; font-weight: 700; letter-spacing: -.02em; }
.cal-grid { display: grid; grid-template-columns: repeat(7, 1fr); gap: 5px; }
.cal-dow { text-align: center; font-size: .7rem; font-weight: 600; text-transform: uppercase; letter-spacing: .08em; color: var(--ink-3); padding: 6px 0; }
.cal-cell { min-height: 66px; border: 1px solid var(--line); border-radius: 12px; padding: 5px; font-size: .75rem; overflow: hidden; background: var(--field); transition: all .18s; }
.cal-empty { border: none; background: transparent; }
.cal-today { border-color: var(--accent); background: var(--accent-soft); }
.cal-click { cursor: pointer; }
.cal-click:hover { border-color: var(--accent); background: var(--accent-soft); transform: scale(1.03); }
.cal-num { color: var(--ink-3); font-weight: 600; font-size: .73rem; }
.cal-chip { display: block; margin-top: 3px; padding: 2px 7px; border-radius: 7px; white-space: nowrap; overflow: hidden; text-overflow: ellipsis; font-weight: 500; }
.chip-free { background: var(--green-bg); color: var(--green-ink); }
.chip-paid { background: var(--accent-soft); color: var(--accent); }
.dot { display: inline-block; width: 9px; height: 9px; border-radius: 50%; vertical-align: middle; }
.dot-free { background: var(--green); } .dot-paid { background: var(--accent); }

.edit-pen {
  background: var(--accent-soft); border: 1px solid var(--line-2); border-radius: 8px;
  cursor: pointer; font-size: .8em; padding: 2px 7px; vertical-align: middle;
  -webkit-text-fill-color: initial; transition: all .15s;
}
.edit-pen:hover { border-color: var(--accent); transform: scale(1.1); }

.form-section { border-top: 1px solid var(--line); padding-top: 16px; margin-top: 16px; }
.form-section:first-of-type { border-top: none; padding-top: 0; margin-top: 0; }
.form-section-title { font-size: .78rem; text-transform: uppercase; letter-spacing: .1em; color: var(--ink-3); margin-bottom: 12px; font-weight: 600; }
.check-label { display: flex; align-items: center; gap: 10px; text-transform: none; letter-spacing: 0; font-size: .95rem; color: var(--ink); cursor: pointer; }
input[type="checkbox"], input[type="radio"] {
  -webkit-appearance: checkbox; appearance: auto;
  width: 19px !important; height: 19px; min-width: 19px;
  accent-color: var(--accent); cursor: pointer; margin: 0;
}
input[type="radio"] { -webkit-appearance: radio; }

.dropzone {
  border: 2px dashed var(--line-2); border-radius: 16px;
  padding: 34px 20px; text-align: center; cursor: pointer;
  transition: all .2s; background: var(--field);
}
.dropzone:hover, .dropzone.drag { border-color: var(--accent); background: var(--accent-soft); }

@media (max-width: 640px) {
  .hero { padding: 44px 0 18px; }
  .hero h1 { font-size: 2.2rem; }
  main { padding: 24px 14px 60px; }
  .card { padding: 20px; border-radius: 16px; }
  nav { padding: 10px 16px; }
  .meeting .btn { width: 100%; text-align: center; }
}