:root {
    --ink: #18202b;
    --muted: #5d6878;
    --paper: #f4f6f3;
    --surface: #ffffff;
    --line: #d8ded7;
    --blue: #0067a8;
    --blue-dark: #004d7e;
    --coral: #c9573d;
    --green: #277457;
    --focus: #f2b84b;
}

* { box-sizing: border-box; }

body {
    margin: 0;
    color: var(--ink);
    background-color: var(--paper);
    background-image:
        linear-gradient(rgba(24, 32, 43, 0.035) 1px, transparent 1px),
        linear-gradient(90deg, rgba(24, 32, 43, 0.035) 1px, transparent 1px);
    background-size: 28px 28px;
    font-family: "Aptos", "Segoe UI Variable", sans-serif;
}

a { color: inherit; }

.site-header {
    min-height: 64px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 12px clamp(20px, 5vw, 72px);
    color: #fff;
    background: var(--ink);
    border-bottom: 4px solid var(--coral);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    font-family: "Aptos Display", "Segoe UI Variable Display", sans-serif;
    font-size: 1.08rem;
    font-weight: 700;
    text-decoration: none;
}

.site-header nav { display: flex; align-items: center; gap: 22px; }
.site-header nav a { color: #e9eef3; font-size: 0.92rem; text-decoration: none; }
.site-header nav a[aria-current="page"] { color: #fff; border-bottom: 2px solid var(--focus); }
.site-header .account-link { padding: 8px 14px; color: #fff; background: var(--blue); border-radius: 4px; }

main { width: min(1180px, calc(100% - 40px)); margin: 0 auto; padding-bottom: 64px; }

.catalog-heading {
    display: grid;
    grid-template-columns: minmax(0, 1fr) 180px;
    align-items: end;
    gap: 36px;
    padding: 48px 0 34px;
    border-bottom: 1px solid var(--line);
}

.eyebrow {
    margin: 0 0 10px;
    color: var(--coral);
    font-size: 0.78rem;
    font-weight: 800;
    text-transform: uppercase;
}

h1, h2, h3 { font-family: "Aptos Display", "Segoe UI Variable Display", sans-serif; }
h1 { max-width: 760px; margin: 0; font-size: clamp(2.2rem, 6vw, 4.4rem); line-height: 0.98; }
.catalog-heading p:last-child { max-width: 640px; margin: 18px 0 0; color: var(--muted); font-size: 1.08rem; line-height: 1.6; }

.heading-mark {
    min-height: 142px;
    display: grid;
    grid-template-columns: 1fr auto;
    align-content: space-between;
    padding: 18px;
    color: #fff;
    background: var(--blue-dark);
    border-left: 8px solid var(--focus);
}
.heading-mark span { font-size: 0.72rem; font-weight: 800; }
.heading-mark strong { grid-row: span 2; font-size: 3.5rem; line-height: 1; }
.heading-mark small { color: #cfe4ef; }

.catalog-tools {
    display: grid;
    grid-template-columns: minmax(240px, 1.5fr) repeat(3, minmax(150px, 1fr));
    gap: 14px;
    padding: 24px;
    margin: 28px 0;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 8px;
    box-shadow: 0 8px 24px rgba(24, 32, 43, 0.06);
}

.catalog-tools label { display: grid; gap: 7px; }
.catalog-tools label > span { color: var(--muted); font-size: 0.76rem; font-weight: 800; text-transform: uppercase; }
.catalog-tools input, .catalog-tools select {
    width: 100%;
    height: 44px;
    padding: 0 12px;
    color: var(--ink);
    background: #fff;
    border: 1px solid #aeb8b0;
    border-radius: 4px;
    font: inherit;
}
.catalog-tools input:focus, .catalog-tools select:focus, a:focus-visible {
    outline: 3px solid var(--focus);
    outline-offset: 2px;
}

.results-heading { display: flex; align-items: baseline; justify-content: space-between; gap: 20px; margin-bottom: 16px; }
.results-heading h2 { margin: 0; font-size: 1.5rem; }
.results-heading span { color: var(--muted); font-size: 0.9rem; }
.catalog-status { padding: 42px 20px; color: var(--muted); text-align: center; border-top: 1px solid var(--line); }

.webinar-grid { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 18px; }
.webinar-card {
    display: grid;
    grid-template-columns: 88px minmax(0, 1fr);
    min-height: 300px;
    overflow: hidden;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 8px;
}
.date-block { padding: 22px 12px; color: #fff; background: var(--ink); text-align: center; }
.date-block span, .date-block small { display: block; font-size: 0.72rem; font-weight: 800; text-transform: uppercase; }
.date-block strong { display: block; margin: 6px 0; font-size: 2.5rem; line-height: 1; }
.webinar-card-content { display: flex; flex-direction: column; padding: 22px; }
.category-list { display: flex; flex-wrap: wrap; gap: 6px; margin-bottom: 13px; }
.category-tag { padding: 4px 7px; color: var(--blue-dark); background: #e7f1f6; border-radius: 3px; font-size: 0.7rem; font-weight: 800; }
.webinar-card h3 { margin: 0; font-size: 1.25rem; line-height: 1.25; }
.course-name { margin: 7px 0 0; color: var(--blue); font-size: 0.85rem; font-weight: 700; }
.description { margin: 14px 0; color: var(--muted); line-height: 1.5; }
.session-meta { display: grid; gap: 5px; margin: auto 0 16px; color: #465261; font-size: 0.84rem; }
.card-footer { display: flex; align-items: center; justify-content: space-between; gap: 14px; padding-top: 14px; border-top: 1px solid var(--line); }
.prices { display: grid; gap: 2px; font-size: 0.8rem; }
.prices strong { color: var(--green); }
.prices small { display: block; color: #667085; font-size: 0.72rem; }
.exchange-rate-note { margin: -8px 0 18px; color: #667085; font-size: 0.8rem; }
.register-link { flex: 0 0 auto; padding: 10px 14px; color: #fff; background: var(--blue); border-radius: 4px; font-size: 0.86rem; font-weight: 800; text-decoration: none; }
.register-link:hover { background: var(--blue-dark); }
.register-link.unavailable { color: var(--muted); background: #e8ece8; pointer-events: none; }
.card-actions { display: flex; align-items: center; gap: 12px; }
.details-link { color: var(--blue-dark); font-size: 0.86rem; font-weight: 800; text-decoration: underline; text-underline-offset: 3px; }

.detail-shell { width: min(920px, calc(100% - 40px)); margin: 0 auto; padding: 34px 0 72px; }
.back-link { display: inline-block; margin-bottom: 28px; color: var(--blue-dark); font-weight: 700; text-decoration: none; }
.webinar-detail { overflow: hidden; background: var(--surface); border: 1px solid var(--line); border-radius: 8px; }
.detail-header { display: grid; grid-template-columns: 110px minmax(0, 1fr); }
.detail-header .date-block { min-height: 180px; }
.detail-heading { padding: 30px; }
.detail-heading h1 { max-width: 700px; font-size: clamp(2rem, 5vw, 3.6rem); line-height: 1.02; }
.detail-heading .course-name { margin-top: 12px; }
.detail-body { display: grid; grid-template-columns: minmax(0, 1fr) 280px; gap: 36px; padding: 34px; border-top: 1px solid var(--line); }
.detail-description { margin: 0; color: #354252; font-size: 1rem; line-height: 1.7; white-space: pre-line; }
.booking-panel { align-self: start; padding: 22px; background: #f5f8f6; border-left: 4px solid var(--green); }
.booking-panel h2 { margin: 0 0 16px; font-size: 1.15rem; }
.booking-panel .session-meta { margin: 0 0 20px; }
.booking-panel .prices { margin-bottom: 20px; font-size: 0.9rem; }
.booking-panel .register-link { display: block; text-align: center; }
.booking-panel .exchange-rate-note { margin: 14px 0 0; }
.detail-status { padding: 60px 20px; color: var(--muted); text-align: center; }

footer {
    display: flex;
    justify-content: space-between;
    gap: 20px;
    padding: 24px clamp(20px, 5vw, 72px);
    color: #cdd5dd;
    background: var(--ink);
    font-size: 0.82rem;
}

@media (max-width: 860px) {
    .catalog-tools { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .webinar-grid { grid-template-columns: 1fr; }
}

@media (max-width: 620px) {
    .site-header { align-items: flex-start; }
    .site-header nav { gap: 12px; }
    .site-header nav a:not(.account-link):not([aria-current="page"]) { display: none; }
    main { width: min(100% - 28px, 1180px); }
    .catalog-heading { grid-template-columns: 1fr; padding-top: 34px; }
    .heading-mark { display: none; }
    .catalog-tools { grid-template-columns: 1fr; padding: 18px; }
    .webinar-card { grid-template-columns: 66px minmax(0, 1fr); }
    .date-block { padding: 20px 8px; }
    .date-block strong { font-size: 2rem; }
    .webinar-card-content { padding: 18px; }
    .card-footer { align-items: flex-start; flex-direction: column; }
    .card-actions { width: 100%; justify-content: space-between; }
    .register-link { width: 100%; text-align: center; }
    .card-actions .register-link { width: auto; }
    .detail-shell { width: min(100% - 28px, 920px); }
    .detail-header { grid-template-columns: 72px minmax(0, 1fr); }
    .detail-header .date-block { padding: 22px 8px; }
    .detail-heading { padding: 24px 20px; }
    .detail-body { grid-template-columns: 1fr; padding: 24px 20px; }
    footer { flex-direction: column; }
}