:root {
    --bg: #f1f5f9;
    --bg-soft: #e8eef5;
    --surface: #ffffff;
    --surface-2: #f8fafc;
    --text: #0f172a;
    --muted: #64748b;
    --border: #e2e8f0;
    --border-strong: #cbd5e1;
    --accent: #2563eb;
    --accent-hover: #1d4ed8;
    --accent-soft: #eff6ff;
    --accent-2: #7c3aed;
    --success: #16a34a;
    --success-soft: #f0fdf4;
    --error: #dc2626;
    --error-soft: #fef2f2;
    --radius: 16px;
    --shadow: 0 4px 24px rgba(15, 23, 42, 0.06);
    --shadow-lg: 0 12px 40px rgba(15, 23, 42, 0.1);
    --font: 'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', 'Consolas', monospace;
}

*, *::before, *::after { box-sizing: border-box; }

body {
    margin: 0;
    min-height: 100vh;
    font-family: var(--font);
    color: var(--text);
    background:
        radial-gradient(ellipse 70% 50% at 50% -20%, rgba(37, 99, 235, 0.08), transparent),
        linear-gradient(180deg, var(--bg-soft) 0%, var(--bg) 100%);
    -webkit-font-smoothing: antialiased;
}

.page {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    padding: 32px 20px 48px;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 28px;
}

.brand__icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    display: grid;
    place-items: center;
    color: #fff;
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.28);
}

.brand__icon svg {
    width: 22px;
    height: 22px;
    stroke: currentColor;
}

.brand__name {
    font-weight: 700;
    font-size: 1.2rem;
    letter-spacing: -0.02em;
    color: var(--text);
}

.card {
    width: 100%;
    max-width: 460px;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.card__header {
    padding: 32px 28px 24px;
    text-align: center;
    border-bottom: 1px solid var(--border);
    background: var(--surface);
}

.card__badge {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 6px 14px;
    border-radius: 999px;
    font-size: 0.7rem;
    font-weight: 700;
    letter-spacing: 0.05em;
    text-transform: uppercase;
    color: var(--accent);
    background: var(--accent-soft);
    border: 1px solid #bfdbfe;
    margin-bottom: 14px;
}

.card__badge--purple {
    color: #6d28d9;
    background: #f5f3ff;
    border-color: #ddd6fe;
}

.card__title {
    margin: 0 0 8px;
    font-size: 1.55rem;
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.2;
    color: var(--text);
}

.card__subtitle {
    margin: 0;
    color: var(--muted);
    font-size: 0.92rem;
    line-height: 1.55;
}

.features {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 10px;
    padding: 20px 28px;
    border-bottom: 1px solid var(--border);
    background: var(--surface-2);
}

.feature {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 12px;
    border-radius: 12px;
    background: var(--surface);
    border: 1px solid var(--border);
}

.feature__icon {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    border-radius: 10px;
    display: grid;
    place-items: center;
    background: var(--accent-soft);
    color: var(--accent);
}

.feature__icon svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
}

.feature__text strong {
    display: block;
    font-size: 0.82rem;
    font-weight: 700;
    margin-bottom: 2px;
    color: var(--text);
}

.feature__text span {
    font-size: 0.75rem;
    color: var(--muted);
}

.card__body {
    padding: 24px 28px 32px;
    background: var(--surface);
}

.field-label {
    display: block;
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--text);
    margin-bottom: 8px;
}

.field-group {
    margin-bottom: 16px;
}

.field-input {
    width: 100%;
    padding: 13px 16px;
    border-radius: 10px;
    border: 1px solid var(--border-strong);
    background: var(--surface);
    color: var(--text);
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.field-input--mac,
.mac-input {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    letter-spacing: 0.06em;
    text-align: center;
    text-transform: uppercase;
}

.field-input::placeholder,
.mac-input::placeholder {
    color: #94a3b8;
}

.field-input--mac::placeholder,
.mac-input::placeholder {
    letter-spacing: 0.02em;
    text-transform: none;
    font-family: var(--font);
    font-size: 0.88rem;
}

.field-input:focus,
.mac-input:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.12);
}

.field-hint {
    margin-top: 6px;
    font-size: 0.75rem;
    color: var(--muted);
    line-height: 1.4;
}

.btn-primary {
    width: 100%;
    margin-top: 4px;
    padding: 14px 20px;
    border: none;
    border-radius: 10px;
    font-family: inherit;
    font-size: 0.95rem;
    font-weight: 700;
    color: #fff;
    cursor: pointer;
    background: var(--accent);
    box-shadow: 0 4px 14px rgba(37, 99, 235, 0.28);
    transition: background 0.15s, transform 0.15s, box-shadow 0.15s;
}

.btn-primary:hover {
    background: var(--accent-hover);
    transform: translateY(-1px);
    box-shadow: 0 6px 20px rgba(37, 99, 235, 0.32);
}

.btn-primary:active { transform: translateY(0); }

.btn-primary:disabled {
    opacity: 0.55;
    cursor: not-allowed;
    transform: none;
}

.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 6px;
    margin-top: 4px;
    padding: 12px 20px;
    border-radius: 10px;
    font-family: inherit;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--text);
    background: var(--surface);
    border: 1px solid var(--border-strong);
    cursor: pointer;
    text-decoration: none;
    transition: background 0.15s, border-color 0.15s;
}

.btn-secondary:hover {
    background: var(--surface-2);
    border-color: var(--border);
}

.message {
    margin-top: 16px;
    padding: 12px 14px;
    border-radius: 10px;
    font-size: 0.88rem;
    line-height: 1.5;
    display: none;
}

.message.is-visible { display: block; }

.message--info {
    background: var(--accent-soft);
    border: 1px solid #bfdbfe;
    color: #1e40af;
}

.message--success {
    background: var(--success-soft);
    border: 1px solid #bbf7d0;
    color: #15803d;
}

.message--error {
    background: var(--error-soft);
    border: 1px solid #fecaca;
    color: #b91c1c;
}

.loader {
    display: none;
    justify-content: center;
    align-items: center;
    gap: 10px;
    margin-top: 18px;
    color: var(--muted);
    font-size: 0.85rem;
}

.loader.is-visible { display: flex; }

.spinner {
    width: 22px;
    height: 22px;
    border: 2px solid var(--border);
    border-top-color: var(--accent);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
}

@keyframes spin { to { transform: rotate(360deg); } }

.footer-links {
    margin-top: 24px;
    text-align: center;
    font-size: 0.85rem;
    color: var(--muted);
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 8px 16px;
}

.footer-links a {
    color: var(--accent);
    text-decoration: none;
    font-weight: 600;
}

.footer-links a:hover { text-decoration: underline; }

.modal {
    display: none;
    position: fixed;
    inset: 0;
    z-index: 1000;
    background: rgba(15, 23, 42, 0.4);
    backdrop-filter: blur(4px);
    padding: 20px;
    align-items: center;
    justify-content: center;
}

.modal.is-open { display: flex; }

.modal__box {
    width: 100%;
    max-width: 400px;
    padding: 28px 24px;
    border-radius: var(--radius);
    background: var(--surface);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.modal__title {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    font-size: 1.1rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.modal__title svg {
    width: 22px;
    height: 22px;
    flex-shrink: 0;
}

.modal__title--success { color: var(--success); }
.modal__title--error { color: var(--error); }

.modal__text {
    color: var(--muted);
    font-size: 0.9rem;
    line-height: 1.55;
    margin-bottom: 16px;
}

.modal__actions {
    display: flex;
    flex-direction: column;
    gap: 10px;
    align-items: center;
}

.steps {
    display: flex;
    justify-content: center;
    gap: 8px;
    padding: 16px 28px 0;
    background: var(--surface);
}

.step {
    flex: 1;
    text-align: center;
    font-size: 0.7rem;
    color: var(--muted);
    font-weight: 600;
}

.step__dot {
    width: 28px;
    height: 28px;
    border-radius: 50%;
    margin: 0 auto 6px;
    display: grid;
    place-items: center;
    font-size: 0.75rem;
    font-weight: 700;
    background: var(--surface-2);
    border: 1px solid var(--border);
    color: var(--muted);
    transition: all 0.3s ease;
}

.step.is-active .step__dot {
    background: var(--accent);
    border-color: var(--accent);
    color: #fff;
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.step.is-done .step__dot {
    background: var(--success-soft);
    border-color: #86efac;
    color: var(--success);
}

.verified-mac {
    display: none;
    align-items: center;
    justify-content: center;
    gap: 8px;
    margin-bottom: 16px;
    padding: 10px 14px;
    border-radius: 10px;
    background: var(--success-soft);
    border: 1px solid #bbf7d0;
    font-family: var(--font-mono);
    font-size: 0.88rem;
    letter-spacing: 0.05em;
    color: #15803d;
}

.verified-mac svg {
    width: 18px;
    height: 18px;
    stroke: currentColor;
    flex-shrink: 0;
}

.verified-mac.is-visible { display: flex; }

.product-area {
    display: none;
    margin-top: 24px;
    padding-top: 24px;
    border-top: 1px solid var(--border);
}

.product-area.is-visible { display: block; }

.product-area__label {
    font-size: 0.78rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--muted);
    margin-bottom: 16px;
    text-align: center;
}

#mac-form.is-hidden { display: none; }

.price-tag {
    display: inline-block;
    margin-top: 12px;
    padding: 8px 20px;
    border-radius: 10px;
    font-size: 1.35rem;
    font-weight: 800;
    color: #fff;
    background: linear-gradient(135deg, var(--accent), var(--accent-2));
    box-shadow: 0 4px 16px rgba(37, 99, 235, 0.25);
}

@media (max-width: 480px) {
    .card__header { padding: 24px 20px 20px; }
    .features { padding: 16px 20px; grid-template-columns: 1fr; }
    .card__body { padding: 20px 20px 28px; }
    .card__title { font-size: 1.35rem; }
}