:root {
  --bg: #f4f6f9;
  --surface: #ffffff;
  --surface-2: #f8fafc;
  --ink: #151922;
  --muted: #687083;
  --line: #e4e8ef;
  --dark: #10131a;
  --dark-2: #1a202b;
  --red: #e63946;
  --red-dark: #bd2430;
  --green: #128c53;
  --shadow-sm: 0 8px 24px rgba(16, 19, 26, .07);
  --shadow-md: 0 20px 50px rgba(16, 19, 26, .12);
  --radius-sm: 12px;
  --radius: 20px;
  --radius-lg: 30px;
  --container: 1540px;
  font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body { margin: 0; color: var(--ink); background: var(--bg); }
a { color: inherit; text-decoration: none; }
button, input, select, textarea { font: inherit; }
button { cursor: pointer; }
img { max-width: 100%; display: block; }

.skip-link {
  position: fixed; left: 12px; top: -50px; z-index: 1000;
  background: #fff; padding: 10px 14px; border-radius: 8px;
}
.skip-link:focus { top: 12px; }

.topbar {
  min-height: 76px;
  display: flex; align-items: center; justify-content: space-between;
  padding: 12px clamp(18px, 4vw, 64px);
  background: var(--dark); color: #fff;
  position: sticky; top: 0; z-index: 50;
  border-bottom: 1px solid rgba(255,255,255,.08);
}
.brand { display: inline-flex; align-items: center; gap: 12px; }
.brand-mark {
  width: 46px; height: 46px; display: grid; place-items: center;
  background: var(--red); border-radius: 14px; font-weight: 900; letter-spacing: -.04em;
  transform: rotate(-3deg);
}
.brand > span:last-child { display: grid; gap: 1px; }
.brand strong { font-size: 1.1rem; text-transform: uppercase; letter-spacing: .05em; }
.brand small { color: #aab3c2; font-size: .78rem; }
.admin-link {
  width: 42px; height: 42px; display: grid; place-items: center;
  border: 1px solid rgba(255,255,255,.14); border-radius: 50%;
}

.public-page main { min-height: calc(100vh - 180px); }
.hero {
  max-width: var(--container); margin: 0 auto;
  padding: clamp(34px, 5vw, 76px) clamp(18px, 4vw, 64px) 26px;
  display: flex; align-items: end; justify-content: space-between; gap: 30px;
}
.hero-copy { max-width: 790px; }
.eyebrow, .section-kicker {
  color: var(--red); font-size: .75rem; font-weight: 900; letter-spacing: .17em;
}
.hero h1 { margin: 8px 0 12px; font-size: clamp(2.35rem, 5.5vw, 5.2rem); line-height: .94; letter-spacing: -.055em; }
.hero p { margin: 0; max-width: 660px; color: var(--muted); font-size: clamp(1rem, 1.5vw, 1.2rem); line-height: 1.6; }
.today-panel {
  min-width: 220px; padding: 22px 24px; border-radius: var(--radius);
  background: var(--dark); color: #fff; box-shadow: var(--shadow-md);
  display: grid; gap: 4px;
}
.today-panel span { color: #aeb8c8; text-transform: uppercase; font-size: .72rem; letter-spacing: .12em; }
.today-panel strong { font-size: 1.3rem; }
.today-panel small { color: #c8ced8; }

.filters-card {
  max-width: calc(var(--container) - 72px); margin: 0 auto 24px;
  padding: 16px; background: var(--surface); border: 1px solid var(--line);
  border-radius: var(--radius); box-shadow: var(--shadow-sm);
}
.filters-form { display: grid; grid-template-columns: minmax(220px, 1fr) minmax(220px, 1fr) auto auto; gap: 12px; align-items: end; }
.filters-form label { display: grid; gap: 7px; }
.filters-form label > span { color: var(--muted); font-size: .77rem; font-weight: 800; text-transform: uppercase; letter-spacing: .08em; padding-left: 4px; }
select, input[type="text"], input[type="email"], input[type="password"], input[type="time"], input[type="number"], input[type="url"], textarea {
  width: 100%; border: 1px solid var(--line); background: #fff; color: var(--ink);
  border-radius: 12px; padding: 12px 13px; outline: none;
  transition: border-color .2s, box-shadow .2s;
}
select:focus, input:focus, textarea:focus { border-color: var(--red); box-shadow: 0 0 0 4px rgba(230,57,70,.10); }
textarea { min-height: 110px; resize: vertical; }
.button {
  min-height: 45px; display: inline-flex; align-items: center; justify-content: center;
  gap: 8px; padding: 10px 17px; border-radius: 12px; border: 1px solid transparent;
  font-weight: 800; white-space: nowrap;
}
.button-primary { background: var(--red); color: #fff; }
.button-primary:hover { background: var(--red-dark); }
.button-dark { background: var(--dark); color: #fff; }
.button-ghost { background: #fff; border-color: var(--line); color: var(--ink); }
.button-danger { background: #fff1f2; color: #b42331; border-color: #ffd7dc; }
.button-small { min-height: 36px; padding: 7px 11px; font-size: .83rem; border-radius: 9px; }

.schedule-shell { max-width: var(--container); margin: 0 auto; padding: 8px clamp(18px, 4vw, 64px) 70px; }
.schedule-toolbar { display: flex; align-items: end; justify-content: space-between; gap: 20px; margin: 18px 0; }
.schedule-toolbar h2 { font-size: clamp(1.65rem, 3vw, 2.55rem); margin: 3px 0 0; letter-spacing: -.04em; }
.week-toggle {
  display: none; border: 1px solid var(--line); background: var(--surface); color: var(--ink);
  padding: 11px 14px; border-radius: 999px; font-weight: 800;
}
.day-pills { display: none; gap: 8px; overflow-x: auto; padding: 4px 0 14px; scrollbar-width: none; }
.day-pills::-webkit-scrollbar { display: none; }
.day-pill {
  flex: 0 0 auto; min-width: 70px; border: 1px solid var(--line); background: #fff;
  border-radius: 16px; padding: 10px; display: grid; gap: 4px; place-items: center;
}
.day-pill span { font-size: .75rem; color: var(--muted); font-weight: 900; }
.day-pill strong { font-size: 1rem; }
.day-pill.is-selected { background: var(--dark); color: #fff; border-color: var(--dark); }
.day-pill.is-selected span { color: #c4cad5; }
.day-pill.is-today { box-shadow: inset 0 -3px 0 var(--red); }

.schedule-board {
  display: grid; grid-template-columns: repeat(7, minmax(0, 1fr)); gap: 12px;
  overflow-x: auto; align-items: start; padding: 8px 2px 22px;
  scroll-snap-type: x proximity;
}
.day-column {
  min-width: 0; background: rgba(255,255,255,.58); border: 1px solid var(--line);
  border-radius: var(--radius); padding: 12px; scroll-snap-align: start;
}
.day-column.is-today { background: #fff; border: 2px solid var(--dark); box-shadow: var(--shadow-md); transform: translateY(-4px); }
.day-header { display: flex; align-items: center; justify-content: space-between; padding: 8px 5px 13px; gap: 8px; }
.day-header > div { display: grid; gap: 2px; }
.day-header span:first-child { color: var(--red); font-size: .72rem; font-weight: 900; letter-spacing: .12em; }
.day-header h3 { margin: 0; font-size: 1rem; }
.class-count { background: #eef1f5; color: var(--muted); border-radius: 999px; font-size: .68rem; font-weight: 800; padding: 5px 8px; }
.day-classes { display: grid; gap: 11px; }
.empty-state { min-height: 150px; display: grid; place-items: center; align-content: center; text-align: center; gap: 5px; padding: 20px 10px; color: var(--muted); border: 1px dashed #cfd5df; border-radius: 15px; }
.empty-state > span { font-size: 1.6rem; }
.empty-state strong { color: #4a5261; font-size: .88rem; }
.empty-state small { font-size: .75rem; }

.class-card {
  position: relative; overflow: hidden; background: #fff; border: 1px solid var(--line);
  border-radius: 17px; padding: 13px; box-shadow: 0 7px 18px rgba(16,19,26,.055);
}
.class-card::before { content: ""; position: absolute; inset: 0 auto 0 0; width: 4px; background: var(--accent); }
.class-card.is-featured { box-shadow: 0 13px 28px color-mix(in srgb, var(--accent) 18%, transparent); }
.class-card-top { display: flex; justify-content: space-between; align-items: start; margin-bottom: 12px; }
.time-badge { display: flex; align-items: baseline; gap: 5px; }
.time-badge strong { font-size: 1.25rem; letter-spacing: -.04em; }
.time-badge span { color: var(--muted); font-size: .71rem; }
.featured-badge { background: #fff3cd; color: #855d05; border-radius: 999px; padding: 4px 7px; font-size: .62rem; font-weight: 900; text-transform: uppercase; }
.modality-line { display: grid; grid-template-columns: 34px 1fr; gap: 9px; align-items: center; }
.modality-icon { width: 34px; height: 34px; display: grid; place-items: center; background: color-mix(in srgb, var(--accent) 14%, white); border-radius: 10px; font-size: 1.15rem; }
.modality-line small { display: block; color: var(--accent); font-weight: 900; font-size: .67rem; text-transform: uppercase; letter-spacing: .06em; }
.modality-line h4 { margin: 2px 0 0; font-size: .97rem; line-height: 1.2; }
.class-location { margin-top: 12px; color: #424b5b; font-size: .78rem; font-weight: 750; line-height: 1.4; }
.class-description { margin: 10px 0 0; color: var(--muted); font-size: .76rem; line-height: 1.45; display: -webkit-box; -webkit-line-clamp: 3; -webkit-box-orient: vertical; overflow: hidden; }
.class-tags { display: flex; flex-wrap: wrap; gap: 5px; margin-top: 10px; }
.class-tags span { padding: 4px 7px; background: #f2f4f7; border-radius: 999px; color: #596273; font-size: .65rem; font-weight: 800; }
.teacher-row { margin-top: 13px; padding-top: 12px; border-top: 1px solid var(--line); display: grid; grid-template-columns: 32px minmax(0, 1fr) auto; gap: 8px; align-items: center; }
.teacher-avatar { width: 32px; height: 32px; border-radius: 50%; overflow: hidden; background: var(--dark); color: #fff; display: grid; place-items: center; font-size: .7rem; font-weight: 900; }
.teacher-avatar img { width: 100%; height: 100%; object-fit: cover; }
.teacher-data { min-width: 0; display: grid; }
.teacher-data small { color: var(--muted); font-size: .59rem; }
.teacher-data strong { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; font-size: .75rem; }
.teacher-data span { color: var(--muted); font-size: .65rem; }
.whatsapp-button { background: #eaf8f0; color: #08753f; border-radius: 9px; padding: 8px 9px; font-size: .68rem; font-weight: 900; }
.whatsapp-button:hover { background: #d8f3e4; }

.site-footer { background: var(--dark); color: #fff; padding: 28px clamp(18px, 4vw, 64px); display: flex; justify-content: space-between; gap: 25px; align-items: center; }
.site-footer > div { display: grid; gap: 2px; }
.site-footer span, .site-footer small { color: #9ea8b8; }

/* Admin */
.admin-body { min-height: 100vh; background: #eef1f5; }
.admin-layout { min-height: 100vh; display: grid; grid-template-columns: 250px minmax(0, 1fr); }
.admin-sidebar { background: var(--dark); color: #fff; padding: 22px 16px; position: sticky; top: 0; height: 100vh; display: flex; flex-direction: column; }
.admin-brand { display: flex; gap: 10px; align-items: center; padding: 4px 5px 24px; }
.admin-brand .brand-mark { width: 42px; height: 42px; }
.admin-brand small { color: #aeb7c5; display: block; }
.admin-nav { display: grid; gap: 6px; }
.admin-nav a { display: flex; gap: 10px; align-items: center; padding: 11px 12px; border-radius: 11px; color: #c5cbd5; font-weight: 700; font-size: .9rem; }
.admin-nav a:hover, .admin-nav a.is-active { color: #fff; background: rgba(255,255,255,.09); }
.admin-sidebar-footer { margin-top: auto; padding-top: 20px; display: grid; gap: 9px; }
.admin-user { display: grid; gap: 2px; padding: 10px; background: rgba(255,255,255,.07); border-radius: 11px; }
.admin-user small { color: #aeb7c5; overflow: hidden; text-overflow: ellipsis; }
.admin-main { min-width: 0; padding: 26px clamp(18px, 3vw, 42px) 60px; }
.admin-topbar { display: flex; align-items: center; justify-content: space-between; gap: 20px; margin-bottom: 24px; }
.admin-topbar h1 { margin: 0; font-size: clamp(1.7rem, 3vw, 2.45rem); letter-spacing: -.04em; }
.admin-topbar p { margin: 5px 0 0; color: var(--muted); }
.admin-grid { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 15px; }
.stat-card, .panel { background: #fff; border: 1px solid var(--line); border-radius: var(--radius); box-shadow: var(--shadow-sm); }
.stat-card { padding: 20px; display: grid; gap: 12px; }
.stat-card span { font-size: 1.6rem; }
.stat-card small { color: var(--muted); font-weight: 750; }
.stat-card strong { font-size: 2rem; }
.panel { padding: 20px; }
.panel + .panel { margin-top: 18px; }
.panel-header { display: flex; align-items: center; justify-content: space-between; gap: 15px; margin-bottom: 17px; }
.panel-header h2, .panel-header h3 { margin: 0; }
.admin-split { display: grid; grid-template-columns: minmax(300px, .75fr) minmax(0, 1.45fr); gap: 18px; align-items: start; }
.form-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; }
.form-field { display: grid; gap: 7px; }
.form-field.full { grid-column: 1 / -1; }
.form-field label { color: #4e5767; font-size: .78rem; font-weight: 850; }
.checkbox-field { display: flex; align-items: center; gap: 8px; min-height: 42px; }
.checkbox-field input { width: 18px; height: 18px; accent-color: var(--red); }
.form-actions { display: flex; gap: 10px; flex-wrap: wrap; margin-top: 16px; }
.table-wrap { overflow-x: auto; }
.data-table { width: 100%; border-collapse: collapse; min-width: 680px; }
.data-table th, .data-table td { padding: 12px 10px; border-bottom: 1px solid var(--line); text-align: left; vertical-align: middle; }
.data-table th { color: var(--muted); font-size: .69rem; text-transform: uppercase; letter-spacing: .08em; }
.data-table td { font-size: .86rem; }
.table-actions { display: flex; justify-content: flex-end; gap: 7px; }
.status { display: inline-flex; padding: 5px 8px; border-radius: 999px; font-size: .68rem; font-weight: 900; }
.status-active { background: #e9f8f0; color: #08753f; }
.status-inactive { background: #f1f3f6; color: #70798a; }
.color-dot { width: 14px; height: 14px; border-radius: 50%; display: inline-block; vertical-align: -2px; margin-right: 7px; }
.flash { padding: 13px 15px; border-radius: 12px; margin-bottom: 15px; font-weight: 750; }
.flash-success { background: #e9f8f0; color: #086d3b; border: 1px solid #c9edda; }
.flash-error { background: #fff0f1; color: #a91f2c; border: 1px solid #ffd3d7; }
.flash-warning { background: #fff7df; color: #805d05; border: 1px solid #f5e3a8; }
.empty-table { text-align: center !important; color: var(--muted); padding: 30px !important; }
.admin-filter { display: flex; gap: 10px; align-items: end; flex-wrap: wrap; }
.admin-filter .form-field { min-width: 190px; }
.login-page { min-height: 100vh; display: grid; place-items: center; padding: 20px; background: radial-gradient(circle at top left, #2a3140 0, var(--dark) 45%, #080a0f 100%); }
.login-card { width: min(100%, 430px); background: #fff; border-radius: 26px; padding: 30px; box-shadow: 0 30px 80px rgba(0,0,0,.35); }
.login-card .brand-mark { margin-bottom: 16px; }
.login-card h1 { margin: 0 0 6px; font-size: 2rem; letter-spacing: -.04em; }
.login-card > p { color: var(--muted); margin: 0 0 22px; }
.login-card form { display: grid; gap: 14px; }
.login-back { display: inline-block; margin-top: 18px; color: var(--muted); font-size: .85rem; }
.mobile-admin-toggle { display: none; }


@media (min-width: 821px) and (max-width: 1279px) {
  .schedule-board { grid-template-columns: repeat(7, minmax(230px, 1fr)); }
  .day-column { min-width: 230px; }
}

@media (min-width: 1280px) {
  .schedule-board .teacher-row { grid-template-columns: 28px minmax(0, 1fr); }
  .schedule-board .teacher-avatar { width: 28px; height: 28px; }
  .schedule-board .whatsapp-button { grid-column: 1 / -1; text-align: center; }
}

@media (max-width: 1180px) {
  .admin-grid { grid-template-columns: repeat(2, minmax(0,1fr)); }
  .admin-split { grid-template-columns: 1fr; }
}

@media (max-width: 900px) {
  .filters-form { grid-template-columns: 1fr 1fr; }
  .hero { align-items: stretch; }
  .today-panel { min-width: 180px; }
  .admin-layout { grid-template-columns: 82px minmax(0, 1fr); }
  .admin-sidebar { padding: 18px 11px; align-items: center; }
  .admin-brand > div:last-child, .admin-nav a span:last-child, .admin-user, .admin-sidebar-footer .button span { display: none; }
  .admin-nav a { justify-content: center; font-size: 1.2rem; }
  .admin-sidebar-footer .button { width: 48px; padding: 8px; }
}

@media (max-width: 820px) {
  .topbar { min-height: 66px; }
  .brand-mark { width: 40px; height: 40px; border-radius: 12px; }
  .hero { display: grid; padding-top: 28px; }
  .hero h1 { font-size: clamp(2.5rem, 13vw, 4.4rem); }
  .today-panel { min-width: 0; grid-template-columns: auto 1fr auto; align-items: center; }
  .today-panel strong { font-size: 1rem; }
  .filters-card { margin-inline: 14px; }
  .filters-form { grid-template-columns: 1fr; }
  .schedule-toolbar { align-items: center; }
  .week-toggle { display: inline-flex; }
  .day-pills { display: flex; }
  .schedule-board { display: block; overflow: visible; padding-top: 0; }
  .schedule-board[data-mobile-mode="day"] .day-column:not(.is-mobile-selected) { display: none; }
  .schedule-board[data-mobile-mode="week"] .day-column { display: block; margin-bottom: 16px; }
  .day-column { min-width: 0; width: 100%; }
  .day-column.is-today { transform: none; }
  .class-card { padding: 15px; }
  .teacher-row { grid-template-columns: 38px minmax(0,1fr) auto; }
  .teacher-avatar { width: 38px; height: 38px; }
}

@media (max-width: 620px) {
  .brand strong { font-size: .95rem; }
  .brand small { font-size: .7rem; }
  .schedule-toolbar { display: grid; }
  .week-toggle { justify-self: start; }
  .site-footer { display: grid; }
  .admin-layout { display: block; }
  .admin-sidebar { position: static; width: 100%; height: auto; display: block; padding: 11px; }
  .admin-brand, .admin-sidebar-footer { display: none; }
  .admin-nav { grid-template-columns: repeat(6, 1fr); gap: 4px; overflow-x: auto; }
  .admin-nav a { min-width: 48px; padding: 10px 8px; }
  .admin-main { padding: 20px 14px 50px; }
  .admin-topbar { align-items: start; }
  .admin-topbar .button { font-size: .77rem; }
  .admin-grid { grid-template-columns: 1fr 1fr; gap: 10px; }
  .stat-card { padding: 15px; }
  .stat-card strong { font-size: 1.6rem; }
  .panel { padding: 15px; border-radius: 16px; }
  .form-grid { grid-template-columns: 1fr; }
  .form-field.full { grid-column: auto; }
}

@media (max-width: 430px) {
  .hero { padding-inline: 17px; }
  .today-panel { grid-template-columns: 1fr; }
  .filters-card { border-radius: 16px; }
  .schedule-shell { padding-inline: 14px; }
  .week-toggle { width: 100%; }
  .whatsapp-button { padding: 9px 8px; }
  .admin-grid { grid-template-columns: 1fr; }
}