:root {
    --dtx-blue-950: #071d36;
    --dtx-blue-800: #0a365f;
    --dtx-blue-650: #075f91;
    --dtx-blue-500: #0786bd;
    --dtx-cyan: #20c4d9;
    --dtx-lime: #b9dc32;
    --dtx-surface: #ffffff;
    --dtx-bg: #f2f7fa;
    --dtx-text: #183247;
    --dtx-muted: #64798a;
    --dtx-border: #d8e4ea;
    --dtx-error: #b42318;
    --dtx-warning: #9a6700;
    --dtx-success: #13734c;
    --dtx-info: #075f91;
    --radius-sm: 10px;
    --radius-md: 18px;
    --radius-lg: 28px;
    --shadow: 0 20px 55px rgba(7, 29, 54, .12);
    --focus: 0 0 0 4px rgba(32, 196, 217, .22);
}

* { box-sizing: border-box; }

html { min-height: 100%; background: var(--dtx-bg); }

body {
    margin: 0;
    min-height: 100vh;
    color: var(--dtx-text);
    background:
        radial-gradient(circle at 12% 0%, rgba(32, 196, 217, .14), transparent 28rem),
        linear-gradient(180deg, #f8fcfe 0, var(--dtx-bg) 100%);
    font-family: system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    line-height: 1.5;
}

button, input, select { font: inherit; }
a { color: var(--dtx-blue-650); }

.app-shell { min-height: 100vh; display: flex; flex-direction: column; }
.app-header { padding: 16px clamp(18px, 4vw, 54px); }
.brand { display: inline-flex; align-items: center; gap: 12px; color: var(--dtx-blue-950); text-decoration: none; font-weight: 800; letter-spacing: .02em; }
.brand img { width: 46px; height: 46px; object-fit: contain; }
.brand strong { color: var(--dtx-blue-500); }
.app-main { width: min(1180px, calc(100% - 28px)); margin: 0 auto; flex: 1; padding: 10px 0 42px; }
.app-footer { padding: 24px; text-align: center; color: var(--dtx-muted); font-size: .875rem; }

.hero-card, .content-card, .state-card {
    overflow: hidden;
    border: 1px solid rgba(216, 228, 234, .9);
    border-radius: var(--radius-lg);
    background: rgba(255, 255, 255, .96);
    box-shadow: var(--shadow);
}

.hero-card { display: grid; }
.event-banner { width: 100%; height: 250px; object-fit: cover; background: var(--dtx-blue-950); }
.hero-content { padding: clamp(26px, 5vw, 58px); }
.hero-content h1, .content-card h1, .state-card h1 { margin: 7px 0 10px; color: var(--dtx-blue-950); line-height: 1.12; font-size: clamp(2rem, 5vw, 3.6rem); }
.hero-content > p { color: var(--dtx-muted); font-size: 1.06rem; max-width: 56ch; }
.eyebrow { color: var(--dtx-blue-650); text-transform: uppercase; letter-spacing: .14em; font-size: .76rem; font-weight: 850; }

.lookup-form { display: grid; gap: 10px; margin-top: 28px; max-width: 540px; }
label { color: var(--dtx-blue-950); font-weight: 700; }
label > input:not([type="checkbox"]):not([type="radio"]), label > select, .search-box input, .file-field {
    display: block;
    width: 100%;
    margin-top: 7px;
}
input:not([type="checkbox"]):not([type="radio"]), select {
    min-height: 48px;
    padding: 10px 13px;
    border: 1px solid var(--dtx-border);
    border-radius: var(--radius-sm);
    background: #fff;
    color: var(--dtx-text);
    outline: none;
}
input:focus, select:focus { border-color: var(--dtx-cyan); box-shadow: var(--focus); }
input.dtx-invalid, select.dtx-invalid, .file-field:has(input.dtx-invalid) {
    border-color: var(--dtx-error);
    box-shadow: 0 0 0 4px rgba(180, 35, 24, .13);
}
input[readonly] { background: #edf3f6; color: var(--dtx-muted); }
small, .fieldset-help { color: var(--dtx-muted); font-weight: 450; }

.button {
    display: inline-flex;
    min-height: 44px;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 10px 18px;
    border: 1px solid transparent;
    border-radius: 999px;
    cursor: pointer;
    text-decoration: none;
    font-weight: 800;
    transition: transform .15s ease, box-shadow .15s ease, background .15s ease;
}
.button:hover { transform: translateY(-1px); }
.button:focus-visible { outline: none; box-shadow: var(--focus); }
.button:disabled { cursor: wait; opacity: .58; transform: none; }
.button-primary { color: #fff; background: linear-gradient(135deg, var(--dtx-blue-650), var(--dtx-blue-500)); box-shadow: 0 10px 24px rgba(7, 95, 145, .22); }
.button-secondary { color: var(--dtx-blue-950); background: #dff7fa; border-color: #a6e4ec; }
.button-ghost { color: var(--dtx-blue-650); background: transparent; border-color: var(--dtx-border); }
.button-large { min-height: 52px; padding-inline: 26px; font-size: 1rem; }
.lookup-form .button { margin-top: 8px; }

.content-card { padding: clamp(22px, 4vw, 46px); }
.narrow-card, .state-card { max-width: 720px; margin: 30px auto; }
.wide-card { width: 100%; }
.section-heading { display: flex; flex-wrap: wrap; align-items: end; justify-content: space-between; gap: 18px; margin-bottom: 28px; }
.section-heading h1 { font-size: clamp(1.75rem, 4vw, 2.8rem); }
.step-pill { padding: 7px 12px; color: var(--dtx-blue-650); background: #e8f7fa; border-radius: 999px; font-weight: 750; font-size: .83rem; }

.registration-form { display: grid; gap: 22px; }
fieldset { min-width: 0; margin: 0; padding: 20px; border: 1px solid var(--dtx-border); border-radius: var(--radius-md); }
fieldset.required-section { border-color: var(--dtx-cyan); background: #f6fdfe; }
legend { padding: 0 8px; color: var(--dtx-blue-950); font-weight: 850; font-size: 1.13rem; }
.form-grid { display: grid; gap: 16px; }
.span-2 { grid-column: 1 / -1; }
.check-row { display: flex; gap: 10px; align-items: flex-start; margin-top: 15px; font-weight: 600; }
.check-row input { flex: 0 0 auto; width: 20px; height: 20px; margin-top: 2px; accent-color: var(--dtx-blue-500); }
.file-field { padding: 18px; border: 1px dashed var(--dtx-blue-500); border-radius: var(--radius-sm); background: #f5fbfd; }
.sticky-submit { position: sticky; bottom: 12px; z-index: 4; display: flex; justify-content: flex-end; gap: 10px; padding: 12px; border: 1px solid var(--dtx-border); border-radius: 999px; background: rgba(255, 255, 255, .94); box-shadow: 0 12px 30px rgba(7, 29, 54, .14); backdrop-filter: blur(10px); }

.message { margin: 18px 0; padding: 14px 16px; border: 1px solid; border-radius: var(--radius-sm); }
.message ul { margin-bottom: 0; padding-left: 20px; }
.message-error { color: #7a271a; background: #fff1ef; border-color: #f4b7ae; }
.message-warning { color: #704d00; background: #fff8df; border-color: #efd37a; }
.message-success { color: #075c3b; background: #eafaf2; border-color: #9ddabc; }
.message-info { color: #084f76; background: #eaf7fc; border-color: #a8d8eb; }

.state-card { padding: clamp(28px, 6vw, 64px); text-align: center; }
.state-icon { display: grid; place-items: center; width: 68px; height: 68px; margin: 0 auto 22px; border-radius: 50%; color: #fff; background: var(--dtx-info); font-size: 2rem; font-weight: 900; }
.state-success .state-icon { background: var(--dtx-success); }
.state-error .state-icon { background: var(--dtx-error); }
.state-warning .state-icon { background: var(--dtx-warning); }
.state-card h1 { font-size: clamp(2rem, 5vw, 3.1rem); }
.state-card > p { color: var(--dtx-muted); font-size: 1.08rem; }
.summary-list { display: grid; margin: 28px 0; overflow: hidden; text-align: left; border: 1px solid var(--dtx-border); border-radius: var(--radius-md); }
.summary-list div { display: grid; grid-template-columns: minmax(110px, .7fr) 1.3fr; gap: 14px; padding: 13px 16px; border-bottom: 1px solid var(--dtx-border); }
.summary-list div:last-child { border-bottom: 0; }
.summary-list dt { color: var(--dtx-muted); }
.summary-list dd { margin: 0; font-weight: 750; }
.actions { display: flex; flex-wrap: wrap; justify-content: center; gap: 10px; margin-top: 24px; }

.search-box { width: min(100%, 330px); font-size: .85rem; }
.table-wrap { overflow-x: auto; border: 1px solid var(--dtx-border); border-radius: var(--radius-md); }
table { width: 100%; border-collapse: collapse; background: #fff; }
th, td { padding: 13px 15px; border-bottom: 1px solid var(--dtx-border); text-align: left; }
th { color: var(--dtx-blue-950); background: #edf6f9; font-size: .83rem; text-transform: uppercase; letter-spacing: .05em; }
tr:last-child td { border-bottom: 0; }
tbody tr:hover { background: #f8fcfd; }
.table-empty { padding: 24px; text-align: center; color: var(--dtx-muted); }

.loader-overlay { position: fixed; inset: 0; z-index: 100; display: grid; place-items: center; padding: 20px; background: rgba(7, 29, 54, .56); backdrop-filter: blur(5px); }
.loader-overlay[hidden] { display: none; }
.loader-card { display: grid; min-width: min(330px, 100%); justify-items: center; gap: 8px; padding: 28px; border-radius: var(--radius-md); background: #fff; box-shadow: var(--shadow); }
.spinner { width: 42px; height: 42px; margin-bottom: 7px; border: 4px solid #d5edf2; border-top-color: var(--dtx-blue-500); border-radius: 50%; animation: spin .75s linear infinite; }
@keyframes spin { to { transform: rotate(360deg); } }

.dtx-dialog { width: min(480px, calc(100% - 28px)); padding: 0; border: 0; border-radius: var(--radius-md); box-shadow: var(--shadow); }
.dtx-dialog::backdrop { background: rgba(7, 29, 54, .55); backdrop-filter: blur(4px); }
.dtx-dialog form { padding: 28px; }
.dtx-dialog h2 { margin-top: 0; color: var(--dtx-blue-950); }
.dtx-dialog.dialog-info { border-top: 6px solid var(--dtx-info); }
.dtx-dialog.dialog-success { border-top: 6px solid var(--dtx-success); }
.dtx-dialog.dialog-warning { border-top: 6px solid var(--dtx-warning); }
.dtx-dialog.dialog-error { border-top: 6px solid var(--dtx-error); }
.toast-region { position: fixed; right: 16px; bottom: 16px; z-index: 120; display: grid; gap: 9px; width: min(360px, calc(100% - 32px)); }
.toast { padding: 13px 16px; color: #fff; border-radius: var(--radius-sm); background: var(--dtx-info); box-shadow: var(--shadow); animation: toast-in .2s ease-out; }
.toast-info { background: var(--dtx-info); }
.toast-error { background: var(--dtx-error); }
.toast-success { background: var(--dtx-success); }
.toast-warning { background: var(--dtx-warning); }
@keyframes toast-in { from { opacity: 0; transform: translateY(8px); } }

@media (min-width: 720px) {
    .hero-card { grid-template-columns: minmax(290px, .85fr) 1.15fr; min-height: 560px; }
    .event-banner { height: 100%; }
    .hero-content { align-self: center; }
    .form-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 520px) {
    .app-main { width: min(100% - 18px, 1180px); }
    .content-card { padding: 19px 14px; border-radius: 20px; }
    fieldset { padding: 16px 12px; }
    .sticky-submit { position: static; flex-direction: column-reverse; border-radius: var(--radius-md); }
    .sticky-submit .button { width: 100%; }
    .summary-list div { grid-template-columns: 1fr; gap: 3px; }
    .actions { flex-direction: column; }
    .actions .button { width: 100%; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { scroll-behavior: auto !important; animation-duration: .01ms !important; transition-duration: .01ms !important; }
}