:root {
    --bg: #ffffff;
    --bg-alt: #f5f8f8;
    --surface: #ffffff;
    --surface-2: #f1f6f6;
    --border: #e0e0e0;
    --border-strong: #c9d6da;
    --green: #4caf50;
    --green-dark: #3d8b40;
    --teal: #4db6ac;
    --text: #1e3a5f;
    --text-dim: #4a6178;
    --text-faint: #7a8b99;
    --danger: #d9534f;
    --danger-bg: #fdecec;
    --gradient: linear-gradient(135deg, #4caf50 0%, #4db6ac 100%);
    --radius: 16px;
    --shadow: 0 1px 2px rgba(30, 58, 95, 0.05), 0 10px 28px rgba(30, 58, 95, 0.07);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: "IBM Plex Sans", -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: inherit;
    text-decoration: none;
}

.wrap {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 24px;
}

.mono {
    font-family: "IBM Plex Mono", ui-monospace, SFMono-Regular, Menlo, monospace;
}

/* Header */
.site-header {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255, 255, 255, 0.92);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--border);
}

.site-header .wrap {
    display: flex;
    align-items: center;
    gap: 28px;
    height: 68px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    font-size: 17px;
    white-space: nowrap;
}

.brand-logo {
    display: block;
    width: 40px;
    height: 40px;
}

.nav {
    display: flex;
    gap: 22px;
    margin-left: auto;
    font-size: 15px;
    color: var(--text-dim);
}

.nav a:hover {
    color: var(--green);
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    border: 1px solid transparent;
    border-radius: 11px;
    padding: 12px 20px;
    font: 600 15px/1 inherit;
    cursor: pointer;
    transition: background 0.15s ease, color 0.15s ease, border-color 0.15s ease;
}

.btn-primary {
    background: var(--gradient);
    color: #fff;
    box-shadow: 0 6px 16px rgba(76, 175, 80, 0.24);
}

.btn-primary:hover {
    filter: brightness(0.94);
}

.btn-ghost {
    background: var(--surface);
    border-color: var(--border-strong);
    color: var(--text);
}

.btn-ghost:hover {
    border-color: var(--green);
    color: var(--green-dark);
}

.btn-danger {
    background: var(--danger);
    color: #fff;
}

.btn[disabled] {
    opacity: 0.6;
    cursor: default;
}

/* Sections */
section {
    padding: 64px 0;
}

.section-alt {
    background: var(--bg-alt);
    border-block: 1px solid var(--border);
}

h1 {
    font-size: clamp(30px, 4vw, 46px);
    line-height: 1.15;
    letter-spacing: -0.02em;
    font-weight: 600;
    margin-bottom: 18px;
}

h2 {
    font-size: clamp(24px, 2.6vw, 32px);
    letter-spacing: -0.01em;
    font-weight: 600;
    margin-bottom: 10px;
}

h3 {
    font-size: 18px;
    font-weight: 600;
    margin-bottom: 8px;
}

.eyebrow {
    color: var(--text-dim);
    font-size: 15px;
    margin-bottom: 32px;
    max-width: 560px;
}

.lead {
    color: var(--text-dim);
    font-size: 18px;
    max-width: 560px;
    margin-bottom: 28px;
}

/* Hero */
.hero {
    display: grid;
    grid-template-columns: 1.15fr 0.85fr;
    gap: 48px;
    align-items: center;
    padding: 72px 0;
}

.tagline {
    color: var(--green);
    font-size: 15px;
    font-weight: 600;
    letter-spacing: 0.01em;
    margin-bottom: 14px;
}

.hero-actions {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin-bottom: 22px;
}

.hero-note {
    color: var(--text-faint);
    font-size: 13px;
}

.chat-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    padding: 18px;
}

.chat-feed {
    display: flex;
    flex-direction: column;
}

.chat-card-header {
    display: flex;
    justify-content: space-between;
    color: var(--text-faint);
    font-size: 12.5px;
    margin-bottom: 12px;
}

.msg {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    padding: 10px 12px;
    border-radius: 10px;
    background: var(--surface-2);
    font-size: 14px;
    margin-bottom: 8px;
    overflow: hidden;
    transition: background 0.3s ease, opacity 0.32s ease, transform 0.32s ease,
        max-height 0.32s ease, margin 0.32s ease, padding 0.32s ease;
}

.msg.flag {
    background: var(--danger-bg);
    box-shadow: inset 3px 0 0 var(--danger);
}

.msg.entering {
    opacity: 0;
    transform: translateY(10px);
}

.msg.enter-active {
    opacity: 1;
    transform: none;
}

.msg.leaving {
    opacity: 0;
    max-height: 0;
    margin-bottom: 0;
    padding-top: 0;
    padding-bottom: 0;
}

.msg .url {
    display: block;
    color: var(--text-faint);
    font-size: 12px;
}

.badge {
    font-size: 11px;
    font-weight: 600;
    border-radius: 999px;
    padding: 3px 9px;
    white-space: nowrap;
}

.badge.ok {
    background: #e8f5e9;
    color: #2e7d32;
}

.badge.bad {
    background: #fbdcdb;
    color: var(--danger);
}

.badge.scanning {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    background: #edf3f5;
    color: var(--text-dim);
}

.pulse-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--teal);
    animation: pulse 1s ease-in-out infinite;
}

.badge.pop {
    animation: pop 0.28s ease;
}

@keyframes pulse {
    0%, 100% {
        opacity: 0.35;
        transform: scale(0.8);
    }
    50% {
        opacity: 1;
        transform: scale(1.15);
    }
}

@keyframes pop {
    from {
        transform: scale(0.6);
        opacity: 0;
    }
    to {
        transform: scale(1);
        opacity: 1;
    }
}

@media (prefers-reduced-motion: reduce) {
    .msg,
    .badge.scanning .pulse-dot {
        transition: none;
        animation: none;
    }
}

/* Grid cards */
.grid {
    display: grid;
    gap: 18px;
}

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

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

.card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 22px;
}

.card p {
    color: var(--text-dim);
    font-size: 14.5px;
}

.card-label {
    font: 500 12px/1 "IBM Plex Mono", monospace;
    color: var(--text-faint);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: 12px;
}

.threat-card {
    transition: border-color 0.2s ease, box-shadow 0.2s ease, transform 0.2s ease;
}

.threat-card:hover {
    border-color: rgba(217, 83, 79, 0.45);
    box-shadow: 0 10px 26px rgba(217, 83, 79, 0.1);
    transform: translateY(-2px);
}

.threat-card h3 {
    position: relative;
    padding-left: 28px;
}

.threat-card h3::before {
    content: "";
    position: absolute;
    left: 0;
    top: 1px;
    width: 19px;
    height: 19px;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%23D9534F' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpath d='M12 3l7 3v6c0 4.6-3 7.6-7 9-4-1.4-7-4.4-7-9V6l7-3z'/%3E%3Cpath d='M12 8.5v4'/%3E%3Ccircle cx='12' cy='15.6' r='0.9' fill='%23D9534F' stroke='none'/%3E%3C/svg%3E");
    background-size: contain;
    background-repeat: no-repeat;
}

@media (prefers-reduced-motion: reduce) {
    .threat-card:hover {
        transform: none;
    }
}

.threat-head {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 10px;
    margin-bottom: 12px;
}

.threat-head .card-label {
    margin-bottom: 0;
}

.threat-warning {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    background: var(--danger);
    color: #ffffff;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    border-radius: 6px;
    padding: 4px 9px;
    white-space: nowrap;
}

.threat-warning::before {
    content: "!";
    display: inline-grid;
    place-items: center;
    width: 13px;
    height: 13px;
    border-radius: 50%;
    background: rgba(255, 255, 255, 0.24);
    font-size: 10px;
    line-height: 1;
}

.card-highlight {
    border-color: var(--green);
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.12);
}

/* Steps */
.steps {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
    counter-reset: step;
}

.step {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 20px;
}

.step-number {
    font: 600 13px/1 "IBM Plex Mono", monospace;
    color: var(--teal);
    margin-bottom: 10px;
}

/* Pricing */
.plans {
    display: grid;
    grid-template-columns: repeat(4, minmax(0, 1fr));
    gap: 18px;
}

.plan {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.plan-name {
    font-weight: 600;
    font-size: 16px;
}

.plan-note {
    color: var(--text-faint);
    font-size: 12.5px;
}

.plan-price {
    font-size: 30px;
    font-weight: 600;
    letter-spacing: -0.02em;
}

.plan-price small {
    font-size: 13px;
    color: var(--text-dim);
    font-weight: 400;
}

.plan ul {
    list-style: none;
    color: var(--text-dim);
    font-size: 14px;
    display: grid;
    gap: 6px;
    margin: 6px 0 8px;
}

.plan ul li::before {
    content: "✓";
    color: var(--teal);
    margin-right: 8px;
}

.plan-free {
    border-color: var(--border-strong);
    background: linear-gradient(180deg, #f1f8f8 0%, #ffffff 55%);
}

.plan-badge {
    align-self: flex-start;
    font-size: 11px;
    font-weight: 600;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: #2e7d32;
    background: #e8f5e9;
    border-radius: 999px;
    padding: 4px 10px;
    margin-bottom: 2px;
}

.plan-free-action {
    margin-top: auto;
    width: 100%;
}

.plan-highlight {
    border-color: var(--green);
    box-shadow: 0 0 0 3px rgba(76, 175, 80, 0.12);
}

.plan form {
    display: grid;
    gap: 8px;
    margin-top: auto;
}

input[type="email"],
input[type="text"],
textarea {
    width: 100%;
    font: 15px/1.4 inherit;
    padding: 11px 14px;
    border: 1px solid var(--border-strong);
    border-radius: 10px;
    background: var(--surface);
    color: var(--text);
}

input:focus,
textarea:focus {
    outline: 2px solid rgba(76, 175, 80, 0.32);
}

.checkbox {
    display: flex;
    gap: 8px;
    align-items: flex-start;
    color: var(--text-faint);
    font-size: 12px;
    line-height: 1.4;
}

.checkbox input {
    margin-top: 3px;
    accent-color: var(--green);
}

.form-error {
    color: var(--danger);
    font-size: 13px;
    min-height: 18px;
}

/* FAQ */
details {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 16px 18px;
    margin-bottom: 10px;
}

details summary {
    cursor: pointer;
    font-weight: 600;
    font-size: 15px;
}

details p {
    color: var(--text-dim);
    font-size: 14.5px;
    margin-top: 10px;
}

/* Footer */
.site-footer {
    border-top: 1px solid var(--border);
    padding: 36px 0;
    color: var(--text-faint);
    font-size: 13px;
}

.site-footer .wrap {
    display: flex;
    flex-wrap: wrap;
    gap: 12px 24px;
    align-items: center;
    justify-content: space-between;
}

.site-footer a:hover {
    color: var(--green);
}

/* Utility */
.center {
    text-align: center;
}

.mt-8 {
    margin-top: 8px;
}

.mt-16 {
    margin-top: 16px;
}

.mt-24 {
    margin-top: 24px;
}

.muted {
    color: var(--text-dim);
}

.small {
    font-size: 13px;
}

.code-box {
    font: 600 24px/1.2 "IBM Plex Mono", monospace;
    letter-spacing: 0.12em;
    background: var(--surface-2);
    border: 1px dashed var(--border-strong);
    border-radius: 12px;
    padding: 18px;
    text-align: center;
    cursor: pointer;
}

.notice {
    border: 1px solid var(--border);
    background: var(--surface-2);
    border-radius: 12px;
    padding: 14px 16px;
    font-size: 14px;
    color: var(--text-dim);
}

.notice-error {
    border-color: #f3c9c6;
    background: var(--danger-bg);
    color: #a13c38;
}

.page {
    max-width: 760px;
    padding: 56px 0 80px;
}

.page h1 {
    font-size: 32px;
}

.page h2 {
    font-size: 22px;
    margin-top: 30px;
}

.page p,
.page li {
    color: var(--text-dim);
    margin-bottom: 12px;
}

.page ul {
    padding-left: 22px;
}

@media (max-width: 1100px) {
    .plans {
        grid-template-columns: repeat(2, minmax(0, 1fr));
    }
}

@media (max-width: 900px) {
    .hero {
        grid-template-columns: 1fr;
        padding: 40px 0;
    }

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

    .nav {
        display: none;
    }
}