:root {
    --bg: #f4f6f8;
    --panel: #ffffff;
    --panel-soft: #f9fafb;
    --line: #dde3ea;
    --text: #1f2a37;
    --muted: #5f6b7a;
    --muted-2: #7b8794;
    --accent: #1f4e79;
    --accent-soft: #e8eff6;
    --warning: #b7791f;
    --shadow: 0 10px 30px rgba(16, 24, 40, 0.06);
    --radius: 18px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    min-height: 100vh;
    color: var(--text);
    font-family: Arial, Helvetica, sans-serif;
    background: linear-gradient(180deg, #f7f9fb 0%, var(--bg) 100%);
}

.page-shell {
    position: relative;
}

.ambient {
    display: none;
}

.container {
    position: relative;
    z-index: 1;
}

.hero-panel {
    grid-template-columns: 1.3fr 0.9fr;
    gap: 22px;
    align-items: stretch;
}

.hero-copy,
.hero-card,
.conference-card {
    background: var(--panel);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

.hero-copy {
    padding: 30px;
}

.event-pill {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 14px;
    border-radius: 999px;
    background: var(--accent-soft);
    color: var(--accent);
    border: 1px solid #d6e2ee;
    font-size: 0.82rem;
    font-weight: 700;
    letter-spacing: 0.02em;
    text-transform: uppercase;
}

.hero-copy h1 {
    margin: 16px 0 12px;
    font-size: clamp(2rem, 4vw, 3.4rem);
    line-height: 1.05;
    letter-spacing: -0.02em;
    color: #162638;
    font-weight: 800;
}

.hero-text {
    color: var(--muted);
    font-size: 1.03rem;
    line-height: 1.7;
    margin-bottom: 22px;
}

.hero-metrics {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 12px;
}

.metric-chip {
    padding: 14px;
    border-radius: 14px;
    background: #f8fafc;
    border: 1px solid #e5ebf1;
}

.metric-value {
    display: block;
    font-size: 1.02rem;
    font-weight: 800;
    color: #17233a;
    margin-bottom: 4px;
}

.metric-label {
    color: var(--muted-2);
    font-size: 0.9rem;
}

.hero-card {
    padding: 24px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    gap: 18px;
}

.hero-card-top {
    display: flex;
    justify-content: space-between;
    gap: 10px;
    align-items: center;
    flex-wrap: wrap;
}

.conference-tag {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 12px;
    border-radius: 999px;
    background: #f8f4ea;
    color: #7c4f00;
    border: 1px solid #ebdec0;
    font-weight: 700;
}

.conference-date {
    color: var(--muted-2);
    font-size: 0.94rem;
}

.hero-card-body {
    display: grid;
    gap: 12px;
}

.hero-icon {
    width: 60px;
    height: 60px;
    display: grid;
    place-items: center;
    border-radius: 14px;
    background: var(--accent-soft);
    color: var(--accent);
    font-size: 1.35rem;
    border: 1px solid #d6e2ee;
}

.hero-card h2 {
    margin: 0;
    font-size: 1.45rem;
    line-height: 1.2;
    color: #162638;
    font-weight: 800;
}

.hero-card p {
    margin: 0;
    color: var(--muted);
    line-height: 1.65;
}

.conference-card {
    padding: 24px;
    margin-bottom: 24px;
}

.feedback-form {
    display: grid;
    gap: 16px;
}

.section-card {
    padding: 20px;
    border-radius: 16px;
    background: var(--panel-soft);
    border: 1px solid #e4e9ef;
}

.section-heading {
    display: flex;
    align-items: flex-start;
    gap: 12px;
    margin-bottom: 16px;
}

.section-index {
    flex: 0 0 auto;
    width: 42px;
    height: 42px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    font-size: 0.92rem;
    font-weight: 800;
    color: var(--accent);
    background: var(--accent-soft);
    border: 1px solid #d6e2ee;
}

.section-heading h3 {
    margin: 0 0 4px;
    font-size: 1.08rem;
    color: #162638;
    font-weight: 800;
}

.section-heading p {
    margin: 0;
    color: var(--muted-2);
    line-height: 1.5;
}

.form-label {
    color: #1f2a37;
    font-weight: 700;
    margin-bottom: 0.45rem;
}

.form-control {
    background: #ffffff;
    color: var(--text);
    border: 1px solid #d7dee6;
    border-radius: 12px;
    min-height: 50px;
    padding: 0.8rem 0.95rem;
    transition: border-color 0.16s ease, box-shadow 0.16s ease;
}

.form-control::placeholder {
    color: #8a94a3;
}

.form-control:focus {
    background: #ffffff;
    color: var(--text);
    border-color: rgba(31, 78, 121, 0.45);
    box-shadow: 0 0 0 0.2rem rgba(31, 78, 121, 0.10);
}

textarea.form-control {
    min-height: 140px;
    resize: vertical;
}

.choice-grid {
    display: grid;
    gap: 12px;
}

.choice-grid-4 {
    grid-template-columns: repeat(4, minmax(0, 1fr));
}

.choice-grid-3 {
    grid-template-columns: repeat(3, minmax(0, 1fr));
}

.choice-card {
    position: relative;
    display: grid;
    gap: 8px;
    min-height: 150px;
    padding: 16px;
    border-radius: 14px;
    background: #ffffff;
    border: 1px solid #dce3ea;
    cursor: pointer;
    transition: border-color 0.16s ease, box-shadow 0.16s ease, transform 0.16s ease;
}

.choice-card:hover {
    transform: translateY(-1px);
    border-color: #c7d3df;
    box-shadow: 0 8px 18px rgba(16, 24, 40, 0.06);
}

.choice-card input {
    position: absolute;
    inset: 0;
    opacity: 0;
    pointer-events: none;
}

.choice-icon {
    width: 42px;
    height: 42px;
    border-radius: 12px;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 4px;
    color: var(--accent);
    background: var(--accent-soft);
    border: 1px solid #d6e2ee;
}

.choice-title {
    color: #17233a;
    font-weight: 800;
    font-size: 1rem;
}

.choice-subtitle {
    color: var(--muted-2);
    line-height: 1.45;
    font-size: 0.94rem;
}

.choice-card.selected {
    border-color: rgba(31, 78, 121, 0.45);
    background: #f4f9ff;
    box-shadow: 0 12px 24px rgba(31, 78, 121, 0.10);
    transform: translateY(-1px);
}

.choice-card.selected .choice-icon {
    background: #dceaf7;
    color: var(--accent);
}

.choice-card.selected .choice-title {
    color: var(--accent);
}

.choice-card.selected .choice-subtitle {
    color: #4e6177;
}

.choice-card.selected::before {
    content: "";
    position: absolute;
    top: 12px;
    right: 12px;
    width: 12px;
    height: 12px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 0 4px rgba(31, 78, 121, 0.10);
}

.form-check-input:focus {
    box-shadow: none;
}

.form-check-input:checked {
    background-color: var(--accent);
    border-color: var(--accent);
}

label.error {
    display: block;
    margin-top: 0.4rem;
    color: #b42318;
    font-size: 0.86rem;
    font-weight: 600;
}

.submit-bar {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 14px;
    flex-wrap: wrap;
    padding-top: 4px;
}

.btn-primary {
    min-height: 52px;
    padding-inline: 1.3rem;
    border: none;
    border-radius: 12px;
    font-weight: 800;
    color: #ffffff;
    background: linear-gradient(180deg, #24507a 0%, #1f4e79 100%);
    box-shadow: 0 10px 20px rgba(31, 78, 121, 0.16);
    transition: transform 0.16s ease, box-shadow 0.16s ease, filter 0.16s ease;
}

.btn-primary:hover,
.btn-primary:focus {
    color: #ffffff;
    transform: translateY(-1px);
    box-shadow: 0 12px 24px rgba(31, 78, 121, 0.20);
    filter: brightness(1.02);
}

.btn-primary:disabled {
    opacity: 0.78;
}

.submit-note {
    max-width: 52ch;
    color: var(--muted-2);
    line-height: 1.55;
}

.swal2-popup {
    border-radius: 18px !important;
}

@media (max-width: 1199.98px) {
    .hero-panel {
        grid-template-columns: 1fr;
    }

    .hero-copy,
    .hero-card,
    .conference-card {
        padding: 22px;
    }

    .choice-grid-4 {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 767.98px) {
    .hero-copy,
    .hero-card,
    .conference-card {
        padding: 18px;
        border-radius: 16px;
    }

    .hero-copy h1 {
        font-size: 2rem;
    }

    .hero-text {
        font-size: 0.98rem;
        margin-bottom: 18px;
    }

    .hero-card h2 {
        font-size: 1.2rem;
    }

    .hero-metrics {
        grid-template-columns: 1fr;
    }

    .event-pill,
    .conference-tag {
        font-size: 0.76rem;
    }

    .choice-grid-4,
    .choice-grid-3 {
        grid-template-columns: 1fr;
    }

    .choice-card {
        min-height: auto;
        padding: 14px;
    }

    .section-card {
        padding: 16px;
    }

    .section-heading {
        gap: 10px;
    }

    .section-heading h3 {
        font-size: 1rem;
    }

    .form-control {
        min-height: 48px;
    }

    .submit-bar {
        align-items: stretch;
    }

    .btn-primary {
        width: 100%;
    }
}

@media (max-width: 575.98px) {
    .container {
        padding-left: 12px;
        padding-right: 12px;
    }

    .hero-copy,
    .hero-card,
    .conference-card {
        padding: 16px;
        border-radius: 14px;
    }

    .section-card {
        padding: 14px;
        border-radius: 14px;
    }

    .section-index {
        width: 38px;
        height: 38px;
        border-radius: 11px;
        font-size: 0.84rem;
    }

    .choice-title {
        font-size: 0.96rem;
    }

    .choice-subtitle {
        font-size: 0.9rem;
    }

    .btn-primary {
        min-height: 50px;
        font-size: 0.98rem;
    }

    textarea.form-control {
        min-height: 120px;
    }
}