:root {
    --navy: #101d45;
    --blue: #293f96;
    --maroon: #a31359;
    --pink: #ec4f79;
    --gold: #f4ba46;
    --ink: #1e2435;
    --muted: #687089;
    --soft: #f7f9fe;
    --border: #dfe5f2;
    --white: #ffffff;
    --shadow: 0 22px 55px rgba(16, 29, 69, 0.13);
}
* { box-sizing: border-box; }
html { scroll-behavior: smooth; }
body {
    margin: 0;
    font-family: 'Inter', Arial, sans-serif;
    color: var(--ink);
    background: #fff;
    line-height: 1.65;
}
a { color: inherit; text-decoration: none; }
img { max-width: 100%; display: block; }
.container { width: min(1180px, calc(100% - 32px)); margin: 0 auto; }
.narrow-container { width: min(920px, calc(100% - 32px)); }
.text-center { text-align: center; }
.section-pad { padding: 40px 0; }
.soft-bg { background: linear-gradient(180deg, #fff 0%, #f8faff 100%); }

.site-header {
    position: sticky;
    top: 0;
    z-index: 40;
    background: rgba(255,255,255,.96);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid rgba(16, 29, 69, .08);
}
.header-inner {
    min-height: 82px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}
.brand-wrap { display: flex; align-items: center; gap: 14px; min-width: 490px; }
.brand-mark {
    width: 68px;
    height: 68px;
    border-radius: 18px;
    display: grid;
    place-items: center;
    text-align: center;
    color: #fff;
    font-weight: 900;
    line-height: 1;
    background: linear-gradient(135deg, var(--navy), var(--maroon));
    box-shadow: 0 12px 24px rgba(163, 19, 89, .22);
}
.brand-mark span { font-size: 13px; }
.brand-text span {
    display: block;
    color: var(--maroon);
    font-size: 11px;
    font-weight: 900;
    letter-spacing: .06em;
    text-transform: uppercase;
}
.brand-text strong {
    display: block;
    max-width: 390px;
    color: var(--navy);
    font-size: 18px;
    line-height: 1.18;
}
.header-actions { display: flex; align-items: center; justify-content: flex-end; gap: 14px; flex-wrap: wrap; font-size: 13px; font-weight: 800; color: var(--navy); }
.small-btn {
    color: #fff;
    padding: 10px 14px;
    border-radius: 999px;
    background: linear-gradient(135deg, var(--maroon), var(--pink));
    box-shadow: 0 10px 20px rgba(163,19,89,.17);
}

.hero-section {
    position: relative;
    overflow: hidden;
    color: #fff;
    background:
        radial-gradient(circle at 80% 20%, rgba(236, 79, 121, .45), transparent 30%),
        radial-gradient(circle at 15% 80%, rgba(244, 186, 70, .18), transparent 28%),
        linear-gradient(125deg, rgba(8, 17, 45, .98), rgba(32, 48, 112, .93), rgba(120, 18, 72, .92)),
        url('https://images.unsplash.com/photo-1576086213369-97a306d36557?auto=format&fit=crop&w=1900&q=80') center/cover;
}
.hero-bg-pattern {
    position: absolute;
    inset: 0;
    opacity: .18;
    background-image: linear-gradient(rgba(255,255,255,.18) 1px, transparent 1px), linear-gradient(90deg, rgba(255,255,255,.18) 1px, transparent 1px);
    background-size: 42px 42px;
}
.hero-section::after {
    content: "";
    position: absolute;
    left: -5%;
    right: -5%;
    bottom: -82px;
    height: 150px;
    background: #fff;
    transform: rotate(-2deg);
}
.hero-grid {
    position: relative;
    z-index: 2;
    min-height: 650px;
    display: grid;
    grid-template-columns: minmax(0, 1.35fr) 430px;
    gap: 42px;
    align-items: center;
    padding: 64px 0 110px;
}
.hero-pill {
    display: inline-flex;
    padding: 9px 16px;
    border-radius: 999px;
    border: 1px solid rgba(255,255,255,.34);
    background: rgba(255,255,255,.12);
    backdrop-filter: blur(12px);
    color: #fff;
    font-weight: 800;
}
.hero-copy h1 {
        margin: 22px 0 18px;
    max-width: 880px;
    font-size: 47px;
    line-height: 58px;
    letter-spacing: -0.055em;
}
.hero-subtitle {
    max-width: 760px;
    margin: 0 0 28px;
    color: rgba(255,255,255,.9);
    font-size: 20px;
}
.hero-info-cards { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 14px; max-width: 760px; margin-bottom: 30px; }
.hero-info-card {
    padding: 18px 20px;
    border: 1px solid rgba(255,255,255,.22);
    border-radius: 18px;
    background: rgba(255,255,255,.13);
    backdrop-filter: blur(14px);
}
.hero-info-card span { display: block; margin-bottom: 5px; color: #ffc6d8; font-size: 13px; font-weight: 900; text-transform: uppercase; letter-spacing: .08em; }
.hero-info-card strong { display: block; font-size: 20px; color: #fff; }
.hero-cta-row { display: flex; gap: 14px; flex-wrap: wrap; }
.primary-btn, .outline-btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
    border: 0;
    border-radius: 14px;
    padding: 13px 24px;
    font-weight: 900;
    cursor: pointer;
    transition: transform .2s ease, box-shadow .2s ease;
}
.primary-btn { color: #fff; background: linear-gradient(135deg, var(--maroon), var(--pink)); box-shadow: 0 16px 34px rgba(163, 19, 89, .30); }
.outline-btn { color: #fff; border: 1px solid rgba(255,255,255,.38); background: rgba(255,255,255,.11); }
.primary-btn:hover, .outline-btn:hover { transform: translateY(-2px); }
.full-btn { width: 100%; }
.hero-register-card {
    border: 1px solid rgba(255,255,255,.22);
    border-radius: 28px;
    padding: 30px;
    background: rgba(255,255,255,.14);
    backdrop-filter: blur(18px);
    box-shadow: 0 24px 70px rgba(0,0,0,.28);
}
.card-badge {
    display: inline-flex;
    padding: 8px 12px;
    border-radius: 999px;
    color: #4c3000;
    background: var(--gold);
    font-weight: 900;
    text-transform: uppercase;
    font-size: 12px;
}
.hero-register-card h2 { margin: 18px 0 18px; font-size: 30px; }
.quick-fee { padding: 22px; margin-bottom: 18px; border-radius: 20px; background: rgba(255,255,255,.94); color: var(--navy); }
.quick-fee span { display: block; color: var(--maroon); font-weight: 900; }
.quick-fee strong { display: block; font-size: 38px; line-height: 1.1; }
.hero-register-card p { color: rgba(255,255,255,.86); }

.section-kicker { margin: 0 0 8px; color: var(--maroon); font-weight: 900; letter-spacing: .09em; text-transform: uppercase; font-size: 13px; }
.section-heading h2, .intro-section h2, .form-copy h2, .abstract-card h2 { margin: 0; color: var(--navy); font-size: 29px; line-height: 45px; letter-spacing: -1.5px; }
.intro-grid { display: grid; grid-template-columns: .85fr 1.15fr; gap: 48px; align-items: start; }
.intro-content p { margin-top: 0; font-size: 17px; color:#000; }
.intro-content ul { margin: 20px 0 0; padding-left: 20px; color: #000;font-size: 16px; }
.intro-content li { margin-bottom: 8px; }

.fee-payment-section { padding: 10px 0 80px; }
.fee-payment-grid { display: grid; grid-template-columns: 430px minmax(0, 1fr); gap: 30px; align-items: stretch; }
.fee-card, .payment-card, .registration-form, .member-card, .policy-card, .abstract-card {
    background: var(--white);
    border: 1px solid var(--border);
    border-radius: 28px;
    box-shadow: var(--shadow);
}
.fee-card { overflow: hidden; }
.fee-card-head { padding: 28px; background: linear-gradient(135deg, #fff2f7, #eff3ff); text-align: center; }
.fee-card-head span { color: var(--maroon); font-weight: 900; text-transform: uppercase; font-size: 13px; }
.fee-card-head h2 { margin: 6px 0 0; color: var(--navy); font-size: 30px; }
.amount-radio {
    display: grid;
    grid-template-columns: 24px 1fr auto;
    gap: 14px;
    align-items: center;
    margin: 0;
    padding: 22px 24px;
    color: var(--navy);
    cursor: pointer;
}
.amount-radio input { width: 20px; height: 20px; margin: 0; accent-color: var(--maroon); }
.amount-radio small { display: block; color: var(--muted); font-size: 12px; text-transform: uppercase; letter-spacing: .06em; }
.amount-radio strong { display: block; font-size: 18px; }
.amount-radio b { font-size: 26px; color: var(--maroon); }
.selected-amount { background: #fff; }
.note-bar { padding: 16px 20px; color: #fff; background: #0d0f16; font-weight: 800; text-align: center; }
.payment-card { padding: 28px; }
.payment-card-head h2 { margin: 0 0 20px; color: var(--navy); font-size: 30px; }
.payment-grid { display: grid; grid-template-columns: 220px minmax(0, 1fr); gap: 24px; align-items: start; }
.qr-panel { padding: 16px; border: 1px dashed #aeb8cd; border-radius: 20px; text-align: center; background: #fbfcff; }
.qr-placeholder {
    height: 168px;
    border-radius: 16px;
    display: grid;
    place-items: center;
    color: var(--maroon);
    font-size: 38px;
    font-weight: 900;
    text-shadow: 0 0 5px #fff;
    background: repeating-linear-gradient(45deg, #111 0 6px, #fff 6px 12px);
}
.qr-panel strong { display: block; margin-top: 12px; color: var(--navy); }
.qr-panel span { display: block; color: var(--muted); font-size: 12px; }
.bank-details { border: 1px solid var(--border); border-radius: 20px; overflow: hidden; }
.bank-details div { display: grid; grid-template-columns: 165px 1fr; border-bottom: 1px solid var(--border); }
.bank-details div:last-child { border-bottom: 0; }
.bank-details span, .bank-details strong { padding: 12px 14px; }
.bank-details span { color: var(--navy); background: #f5f7fc; font-weight: 900; }
.bank-details strong { color: var(--ink); overflow-wrap: anywhere; }
.payment-alert { margin-top: 20px; padding: 15px 16px; color: #6a4300; background: #fff7e8; border-radius: 16px; font-weight: 800; }

.abstract-section { background: linear-gradient(135deg, #fff, #f9fbff); }
.abstract-card { display: flex; align-items: center; justify-content: space-between; gap: 24px; padding: 32px; }
.abstract-card p:not(.section-kicker) { max-width: 780px; color: var(--muted); }

.form-layout { display: grid; grid-template-columns: .8fr 1.4fr; gap: 34px; align-items: start; }
.form-copy { position: sticky; top: 110px; }
.form-copy p { color: var(--muted); }
.event-mini-card {
    margin: 24px 0;
    padding: 20px;
    border-radius: 22px;
    background: linear-gradient(135deg, #101d45, #a31359);
    color: #fff;
    box-shadow: 0 16px 35px rgba(16,29,69,.18);
}
.event-mini-card span, .event-mini-card strong, .event-mini-card em { display: block; }
.event-mini-card span { font-weight: 900; line-height: 1.25; }
.event-mini-card strong { margin-top: 10px; color: #ffdce7; font-size: 20px; }
.event-mini-card em { margin-top: 4px; font-style: normal; color: rgba(255,255,255,.86); }
.check-list { padding: 0; margin: 0; list-style: none; }
.check-list li { position: relative; padding-left: 30px; margin-bottom: 12px; color: var(--muted); }
.check-list li::before { content: "✓"; position: absolute; left: 0; top: 0; color: var(--maroon); font-weight: 900; }
.registration-form { padding: 30px; }
.form-row { display: grid; grid-template-columns: 1fr 1fr; gap: 18px; }
label { display: block; margin-bottom: 16px; color: var(--navy); font-size: 14px; font-weight: 900; }
input, select, textarea {
    width: 100%;
    margin-top: 7px;
    padding: 13px 14px;
    border: 1px solid #cfd6e6;
    border-radius: 13px;
    background: #fff;
    color: var(--ink);
    font: inherit;
    outline: none;
}
input:focus, select:focus, textarea:focus { border-color: var(--maroon); box-shadow: 0 0 0 4px rgba(163, 19, 89, .09); }
.radio-field { margin-bottom: 18px; }
.field-title { display: block; color: var(--navy); font-weight: 900; margin-bottom: 10px; }
.form-radio { border: 1px solid var(--border); border-radius: 18px; background: #fbfcff; }
.form-radio b { display: none; }
.form-footer { display: flex; align-items: center; justify-content: space-between; gap: 18px; flex-wrap: wrap; margin-top: 8px; }
.consent { display: flex; align-items: flex-start; gap: 10px; flex: 1; margin: 0; color: var(--muted); font-weight: 700; }
.consent input { width: auto; margin-top: 5px; }

.committee-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 24px; margin-top: 36px; }
.member-card { padding: 22px 18px 24px; text-align: center; transition: transform .2s ease, box-shadow .2s ease; }
.member-card:hover { transform: translateY(-7px); box-shadow: 0 28px 60px rgba(16,29,69,.16); }
.member-card img {
    width: 148px;
    height: 148px;
    object-fit: cover;
    object-position: top center;
    border-radius: 50%;
    margin: 0 auto 18px;
    border: 6px solid #fff;
    outline: 4px solid rgba(163, 19, 89, .22);
    box-shadow: 0 12px 30px rgba(16,29,69,.14);
}
.member-card h3 { margin: 0 0 6px; color: var(--navy); font-size: 16px; text-transform: uppercase; }
.member-card p { margin: 0; color: var(--maroon); font-weight: 900; font-size: 13px; }

.policy-card { margin-top: 16px; overflow: hidden; }
.policy-card summary { padding: 21px 24px; background: #fbfcff; cursor: pointer; color: var(--navy); font-size: 18px; font-weight: 900; }
.policy-card ul { margin: 0; padding: 0 28px 24px 48px; color: var(--muted); }
.policy-card li { margin-bottom: 8px; }

.site-footer { padding: 58px 0 0; color: #fff; background: #101d45; }
.footer-grid { display: grid; grid-template-columns: 1.35fr 1fr 1fr; gap: 40px; }
.site-footer h3 { margin: 0 0 14px; }
.site-footer p, .site-footer a { display: block; margin: 0 0 8px; color: rgba(255,255,255,.78); }
.footer-social { display: flex; gap: 8px; margin-top: 14px; }
.footer-social span { display: grid; place-items: center; min-width: 30px; height: 30px; border-radius: 9px; background: rgba(255,255,255,.12); font-size: 12px; font-weight: 900; }
.copyright { margin-top: 38px; padding: 20px; text-align: center; color: rgba(255,255,255,.72); border-top: 1px solid rgba(255,255,255,.12); }

.success-page { min-height: 100vh; display: grid; place-items: center; background: linear-gradient(135deg, #f8faff, #fff4f8); }
.success-card { width: min(650px, calc(100% - 32px)); text-align: center; background: #fff; padding: 42px; border-radius: 24px; box-shadow: var(--shadow); }
.success-card h1 { color: var(--navy); margin-top: 0; }

@media (max-width: 1080px) {
    .header-inner { align-items: flex-start; flex-direction: column; padding: 14px 0; }
    .header-actions { justify-content: flex-start; }
    .hero-grid, .fee-payment-grid, .form-layout, .intro-grid, .footer-grid { grid-template-columns: 1fr; }
    .form-copy { position: static; }
    .committee-grid { grid-template-columns: repeat(2, 1fr); }
}
@media (max-width: 720px) {
    .container { width: min(100% - 24px, 1180px); }
    .brand-wrap { min-width: 0; }
    .brand-text strong { font-size: 15px; }
    .hero-grid { min-height: auto; padding: 58px 0 100px; }
    .hero-info-cards, .payment-grid, .form-row, .bank-details div { grid-template-columns: 1fr; }
    .abstract-card { align-items: flex-start; flex-direction: column; }
    .committee-grid { grid-template-columns: 1fr; }
    .section-pad { padding: 56px 0; }
    .registration-form, .payment-card, .abstract-card { padding: 22px; }
    .quick-fee strong { font-size: 32px; }
}