* {
    box-sizing: border-box;
}

:root {
    --bg: #f4f7fb;
    --surface: #ffffff;
    --text: #162033;
    --muted: #657189;
    --line: #dfe5ef;
    --primary: #173f73;
    --primary-strong: #0d2f5b;
    --danger: #9f1d2f;
    --danger-soft: #fff1f3;
    --success: #16643a;
    --success-soft: #eef9f3;
    --shadow: 0 14px 40px rgba(18, 42, 77, 0.08);
}

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

body {
    margin: 0;
    min-height: 100vh;
    font-family: Inter, ui-sans-serif, system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    color: var(--text);
    background:
        radial-gradient(circle at 20% 0%, rgba(23, 63, 115, 0.08), transparent 34rem),
        var(--bg);
}

a {
    color: var(--primary);
}

.shell {
    width: min(1100px, calc(100% - 32px));
    margin: 0 auto;
}

.site-header {
    background: rgba(255,255,255,.92);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(12px);
}

.header-inner {
    min-height: 68px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
}

.brand {
    text-decoration: none;
    color: var(--text);
    font-weight: 800;
    letter-spacing: -.02em;
}

.header-link {
    text-decoration: none;
    font-weight: 700;
}

main.shell {
    padding-top: 48px;
    padding-bottom: 72px;
}

.hero {
    min-height: 62vh;
    display: grid;
    place-items: center;
    text-align: center;
}

.hero > div {
    max-width: 760px;
}

.eyebrow {
    margin: 0 0 10px;
    color: var(--primary);
    font-size: .82rem;
    font-weight: 800;
    letter-spacing: .12em;
    text-transform: uppercase;
}

h1, h2 {
    margin-top: 0;
    letter-spacing: -.035em;
}

h1 {
    font-size: clamp(2.3rem, 6vw, 4.8rem);
    margin-bottom: 18px;
}

h2 {
    font-size: 1.45rem;
}

.lead {
    font-size: 1.16rem;
    line-height: 1.7;
    color: var(--muted);
}

.rules {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
    margin: 30px 0;
}

.rules > div {
    padding: 18px;
    background: rgba(255,255,255,.72);
    border: 1px solid var(--line);
    border-radius: 16px;
}

.rules strong,
.rules span {
    display: block;
}

.rules strong {
    font-size: 1.15rem;
}

.rules span {
    margin-top: 3px;
    color: var(--muted);
    font-size: .88rem;
}

.button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border: 1px solid transparent;
    border-radius: 11px;
    padding: 12px 18px;
    font: inherit;
    font-weight: 800;
    cursor: pointer;
    text-decoration: none;
}

.button-large {
    min-width: 220px;
    padding: 15px 24px;
    font-size: 1.05rem;
}

.button-primary {
    background: var(--primary);
    color: #fff;
}

.button-primary:hover {
    background: var(--primary-strong);
}

.button-secondary {
    background: #fff;
    color: var(--text);
    border-color: var(--line);
}

.start-form {
    margin-top: 26px;
}

.muted,
.privacy-note {
    color: var(--muted);
}

.privacy-note {
    font-size: .88rem;
    line-height: 1.55;
    margin-bottom: 0;
}

.flash {
    border: 1px solid;
    border-radius: 12px;
    padding: 14px 16px;
    margin-bottom: 24px;
}

.flash-error {
    color: var(--danger);
    background: var(--danger-soft);
    border-color: #f1c5cc;
}

.flash-success {
    color: var(--success);
    background: var(--success-soft);
    border-color: #bee3cf;
}

.flash-info {
    color: var(--primary);
    background: #eef5ff;
    border-color: #c9ddf8;
}

.quiz-top {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: 28px;
    align-items: end;
    margin-bottom: 22px;
}

.progress {
    display: block;
    width: min(560px, 100%);
    height: 9px;
    border: 0;
    border-radius: 999px;
    overflow: hidden;
    background: #e7ebf2;
    appearance: none;
}

.progress::-webkit-progress-bar {
    background: #e7ebf2;
    border-radius: 999px;
}

.progress::-webkit-progress-value {
    background: var(--primary);
    border-radius: 999px;
}

.progress::-moz-progress-bar {
    background: var(--primary);
    border-radius: 999px;
}

.timer-box {
    text-align: right;
}

.timer-label {
    display: block;
    color: var(--muted);
    font-size: .78rem;
    text-transform: uppercase;
    letter-spacing: .12em;
    font-weight: 800;
}

#timer {
    font-variant-numeric: tabular-nums;
    font-size: 1.5rem;
}

.email-card {
    overflow: hidden;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow);
}

.email-header {
    padding: 20px 24px;
    border-bottom: 1px solid var(--line);
    background: #fafbfd;
}

.email-row {
    display: grid;
    grid-template-columns: 82px 1fr;
    gap: 14px;
    padding: 4px 0;
    overflow-wrap: anywhere;
}

.email-row span {
    color: var(--muted);
}

.email-body {
    min-height: 280px;
    padding: 34px 30px;
    font-family: Arial, Helvetica, sans-serif;
    font-size: 1rem;
    line-height: 1.65;
}

.simulated-link-wrap {
    margin: 28px 0;
    text-align: center;
}

.simulated-link {
    display: inline-block;
    padding: 10px 16px;
    border-radius: 8px;
    background: #1667c5;
    color: #fff;
    font-weight: 700;
    text-decoration: underline;
}

.simulated-link-wrap small {
    display: block;
    margin-top: 9px;
    color: var(--muted);
    overflow-wrap: anywhere;
}

.attachment {
    display: inline-block;
    margin-top: 20px;
    padding: 12px 14px;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #f7f9fc;
}

.answer-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 20px;
}

.answer-button {
    min-height: 92px;
    padding: 16px 18px;
    border: 2px solid;
    border-radius: 14px;
    background: #fff;
    cursor: pointer;
    font: inherit;
}

.answer-button strong,
.answer-button span {
    display: block;
}

.answer-button strong {
    font-size: 1.1rem;
}

.answer-button span {
    margin-top: 4px;
    color: var(--muted);
}

.answer-button.phishing {
    border-color: #d8a4ad;
}

.answer-button.legitimate {
    border-color: #9cc9b2;
}

.answer-button:hover {
    transform: translateY(-1px);
    box-shadow: var(--shadow);
}

.results-summary,
.page-heading {
    text-align: center;
    margin-bottom: 30px;
}

.results-summary h1 {
    margin-bottom: 6px;
}

.score-line {
    font-size: 1.2rem;
    font-weight: 800;
}

.panel {
    margin: 22px 0;
    padding: 26px;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: 18px;
    box-shadow: var(--shadow);
}

.center {
    text-align: center;
}

.review-list {
    display: grid;
    gap: 14px;
}

.review-item {
    padding: 18px;
    border: 1px solid var(--line);
    border-left-width: 5px;
    border-radius: 12px;
}

.review-correct {
    border-left-color: var(--success);
    background: var(--success-soft);
}

.review-wrong {
    border-left-color: var(--danger);
    background: var(--danger-soft);
}

.review-heading {
    display: flex;
    align-items: flex-start;
    gap: 12px;
}

.review-heading small {
    display: block;
    margin-top: 3px;
    color: var(--muted);
}

.status-dot {
    font-size: 1.25rem;
    font-weight: 900;
}

.form-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 18px;
}

.form-grid label span {
    display: block;
    margin-bottom: 7px;
    font-weight: 800;
}

input {
    width: 100%;
    border: 1px solid #cfd7e4;
    border-radius: 9px;
    padding: 11px 12px;
    font: inherit;
    background: #fff;
}

input:focus {
    outline: 3px solid rgba(23,63,115,.14);
    border-color: var(--primary);
}

.form-actions {
    grid-column: 1 / -1;
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 6px;
}

.table-wrap {
    overflow-x: auto;
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 760px;
}

th,
td {
    padding: 13px 12px;
    border-bottom: 1px solid var(--line);
    text-align: left;
}

th {
    color: var(--muted);
    font-size: .78rem;
    text-transform: uppercase;
    letter-spacing: .08em;
}

.rank {
    font-weight: 900;
}

.empty-state {
    text-align: center;
    color: var(--muted);
    padding: 26px;
}

.site-footer {
    padding: 24px 0 40px;
    color: var(--muted);
    text-align: center;
    font-size: .9rem;
}

@media (max-width: 720px) {
    main.shell {
        padding-top: 30px;
    }

    .rules,
    .form-grid,
    .answer-grid {
        grid-template-columns: 1fr;
    }

    .quiz-top {
        grid-template-columns: 1fr;
        align-items: start;
    }

    .timer-box {
        text-align: left;
    }

    .email-row {
        grid-template-columns: 1fr;
        gap: 1px;
    }

    .email-body {
        padding: 24px 20px;
    }

    .panel {
        padding: 20px;
    }
}