.landing-page {
    --landing-ink: #26322e;
    --landing-muted: #515b54;
    --landing-paper: #fffdf9;
    --landing-line: #e0d8cc;
    --landing-accent: #a2462f;
}
.landing-header,
.landing-main {
    width: min(1120px, 100% - 64px);
    margin-inline: auto;
}
.landing-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    min-height: 76px;
    border-bottom: 1px solid var(--landing-line);
}
.landing-login,
.landing-action {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 46px;
    padding: 0 17px;
    border: 1px solid var(--landing-line);
    border-radius: 8px;
    color: var(--landing-ink);
    font-weight: 650;
    text-decoration: none;
}
.landing-login:hover { background: var(--landing-paper); }
.landing-action {
    padding-inline: 20px;
    border-color: var(--landing-accent);
    background: var(--landing-accent);
    color: #fff;
}
.landing-action:hover { background: #893823; }
.landing-hero {
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.18fr);
    gap: clamp(30px, 4.5vw, 64px);
    align-items: center;
    padding-block: clamp(40px, 5.7vw, 78px);
}
.landing-kicker {
    margin: 0 0 13px;
    color: var(--landing-accent);
    font-size: 14px;
    font-weight: 650;
}
.landing-intro h1 {
    margin: 0;
    font-size: clamp(36px, 4.7vw, 60px);
    line-height: 1.06;
    letter-spacing: -.045em;
    text-wrap: balance;
}
.landing-lead {
    max-width: 34ch;
    margin: 22px 0 26px;
    color: var(--landing-muted);
    font-size: clamp(17px, 1.6vw, 20px);
    line-height: 1.5;
}
.landing-board {
    min-width: 0;
    margin: 0;
    overflow: hidden;
    border: 1px solid var(--landing-line);
    border-radius: 12px;
    background: var(--landing-paper);
    box-shadow: 0 14px 40px #3f352514;
}
.landing-board-header {
    display: flex;
    flex-wrap: wrap;
    justify-content: space-between;
    gap: 6px 16px;
    padding: 14px 18px;
    border-bottom: 1px solid var(--landing-line);
    font-size: 14px;
    font-weight: 650;
}
.landing-topic { color: var(--landing-muted); font-size: 13px; }
.landing-canvas {
    padding: clamp(14px, 2vw, 24px);
    background-image:
        linear-gradient(#eae4d9 1px, transparent 1px),
        linear-gradient(90deg, #eae4d9 1px, transparent 1px);
    background-size: 22px 22px;
}
.landing-task {
    margin: 0 0 12px;
    font-size: 14px;
    line-height: 1.45;
}
.landing-task strong { font-size: 17px; }
.landing-work {
    display: grid;
    grid-template-columns: minmax(0, 1.9fr) minmax(108px, 1fr);
    gap: clamp(10px, 1.6vw, 20px);
    align-items: center;
}
.landing-work svg { display: block; width: 100%; height: auto; }
.landing-solution {
    display: grid;
    gap: clamp(12px, 2.2vw, 24px);
    margin: 0;
    padding: 0;
    list-style: none;
}
.landing-solution li {
    padding-left: 10px;
    border-left: 3px dashed #396748;
    color: #396748;
}
.landing-solution li + li {
    border-color: var(--landing-accent);
    color: var(--landing-accent);
}
.landing-solution span {
    display: block;
    margin-bottom: 3px;
    color: var(--landing-ink);
    font-size: 13px;
    line-height: 1.3;
}
.landing-solution b {
    display: block;
    font-size: clamp(16px, 2vw, 25px);
    line-height: 1.25;
    white-space: nowrap;
}
.landing-lesson {
    padding-block: 32px 54px;
    border-top: 1px solid var(--landing-line);
}
.landing-lesson h2 { margin: 0 0 24px; font-size: clamp(25px, 3vw, 34px); }
.landing-steps {
    display: grid;
    grid-template-columns: repeat(3, minmax(0, 1fr));
    gap: 22px 42px;
    margin: 0;
    padding: 0 0 0 24px;
}
.landing-steps li::marker { color: var(--landing-accent); font-weight: 700; }
.landing-steps h3 { margin: 0 0 7px; font-size: 18px; }
.landing-steps p { margin: 0; color: var(--landing-muted); line-height: 1.55; }

@media (max-width: 780px) {
    .landing-header, .landing-main { width: min(560px, 100% - 36px); }
    .landing-header { min-height: 68px; }
    .landing-hero, .landing-steps { grid-template-columns: 1fr; }
    .landing-hero { gap: 26px; }
}
@media (max-width: 350px) {
    .landing-work { grid-template-columns: 1fr; }
    .landing-solution { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}