:root {
    --blue-950: #071a32;
    --blue-850: #0d2e55;
    --blue-650: #155b8e;
    --red: #d7192a;
    --red-dark: #a70f1d;
    --yellow: #ffd54a;
    --white: #ffffff;
    --muted: #d7e7f7;
    --panel: rgba(255, 255, 255, 0.08);
    --line: rgba(255, 255, 255, 0.16);
}

* {
    box-sizing: border-box;
}

body {
    margin: 0;
    font-family: Arial, Helvetica, sans-serif;
    color: var(--white);
    background: linear-gradient(145deg, var(--blue-950), var(--blue-850) 55%, var(--blue-650));
    min-height: 100vh;
}

a {
    color: inherit;
}

.site-header {
    position: sticky;
    top: 0;
    z-index: 10;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 24px;
    padding: 18px clamp(16px, 4vw, 56px);
    background: rgba(7, 26, 50, 0.92);
    border-bottom: 1px solid var(--line);
    backdrop-filter: blur(10px);
}

.brand {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    text-decoration: none;
    font-weight: 800;
    letter-spacing: 0;
}

.brand-mark {
    display: grid;
    place-items: center;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--red);
    color: var(--white);
    font-size: 24px;
    line-height: 1;
}

.nav {
    display: flex;
    align-items: center;
    gap: 18px;
    font-size: 14px;
}

.nav a {
    color: var(--muted);
    text-decoration: none;
}

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

.menu-toggle {
    display: none;
}

.hero {
    display: grid;
    grid-template-columns: minmax(0, 1.1fr) minmax(280px, 0.9fr);
    gap: clamp(28px, 5vw, 72px);
    align-items: center;
    padding: clamp(36px, 7vw, 84px) clamp(16px, 4vw, 56px);
}

.eyebrow {
    color: var(--yellow);
    font-weight: 700;
    text-transform: uppercase;
    font-size: 13px;
    letter-spacing: 0.08em;
}

h1,
h2,
h3 {
    margin: 0 0 14px;
    line-height: 1.08;
}

h1 {
    max-width: 740px;
    font-size: clamp(38px, 6vw, 72px);
}

h2 {
    font-size: clamp(26px, 4vw, 42px);
}

h3 {
    font-size: 22px;
}

p {
    color: var(--muted);
    line-height: 1.65;
}

.lead {
    max-width: 720px;
    font-size: 19px;
}

.hero-actions,
.form-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 26px;
}

.button,
button {
    border: 0;
    border-radius: 8px;
    padding: 13px 18px;
    background: var(--red);
    color: var(--white);
    font-weight: 800;
    text-decoration: none;
    cursor: pointer;
}

.button.secondary {
    background: transparent;
    color: var(--yellow);
    border: 1px solid var(--yellow);
}

.hero-image {
    width: min(100%, 520px);
    justify-self: center;
    border-radius: 8px;
    box-shadow: 0 22px 70px rgba(0, 0, 0, 0.35);
}

.section {
    padding: 36px clamp(16px, 4vw, 56px);
}

.grid {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 18px;
}

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

.card,
.form-panel,
.result-panel {
    border: 1px solid var(--line);
    border-radius: 8px;
    background: var(--panel);
    padding: 22px;
}

.price {
    color: var(--yellow);
    font-size: 28px;
    font-weight: 900;
}

.list {
    margin: 18px 0 0;
    padding-left: 18px;
    color: var(--muted);
    line-height: 1.7;
}

.form-panel {
    max-width: 980px;
    margin: 34px auto;
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 16px;
}

label {
    display: grid;
    gap: 7px;
    color: var(--white);
    font-weight: 700;
}

input,
select,
textarea {
    width: 100%;
    border: 1px solid rgba(255, 255, 255, 0.24);
    border-radius: 8px;
    padding: 12px;
    color: var(--white);
    background: rgba(2, 13, 26, 0.62);
}

textarea {
    min-height: 110px;
    resize: vertical;
}

.full {
    grid-column: 1 / -1;
}

.alert {
    margin: 18px 0;
    padding: 14px 16px;
    border-radius: 8px;
    background: rgba(255, 213, 74, 0.14);
    border: 1px solid rgba(255, 213, 74, 0.42);
    color: var(--white);
}

.success {
    background: rgba(27, 169, 90, 0.18);
    border-color: rgba(27, 169, 90, 0.55);
}

.danger {
    background: rgba(215, 25, 42, 0.18);
    border-color: rgba(215, 25, 42, 0.55);
}

.site-footer {
    padding: 28px clamp(16px, 4vw, 56px);
    border-top: 1px solid var(--line);
    background: rgba(7, 26, 50, 0.78);
}

.site-footer p {
    margin: 4px 0;
}

@media (max-width: 820px) {
    .site-header {
        align-items: flex-start;
    }

    .menu-toggle {
        display: inline-flex;
        padding: 9px 12px;
    }

    .nav {
        display: none;
        position: absolute;
        left: 16px;
        right: 16px;
        top: 66px;
        flex-direction: column;
        align-items: stretch;
        padding: 18px;
        border-radius: 8px;
        background: var(--blue-950);
        border: 1px solid var(--line);
    }

    .nav.open {
        display: flex;
    }

    .hero,
    .grid,
    .grid.two,
    .form-grid {
        grid-template-columns: 1fr;
    }
}