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

:root {
    --vt-deep: #1b2a6b;
    --vt-main: #2f47a8;
    --vt-mint: #22c9ab;
    --vt-mint-deep: #0f9c85;
    --vt-ink: #171d33;
    --vt-mute: #616a86;
    --vt-back: #f2f4fa;
    --vt-panel: #ffffff;
    --vt-edge: #dde2f0;
    --vt-head: "Trebuchet MS", sans-serif;
    --vt-ui: Verdana, sans-serif;
    --vt-r1: 10px;
    --vt-r2: 18px;
    --vt-r3: 26px;
    --vt-lift1: 0 6px 18px rgba(27, 42, 107, .07);
    --vt-lift2: 0 14px 34px rgba(27, 42, 107, .11);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--vt-head);
    background:
        radial-gradient(circle at 88% 4%, rgba(34, 201, 171, .12), transparent 38%),
        linear-gradient(180deg, #f7f9fd 0%, var(--vt-back) 100%);
    color: var(--vt-ink);
    font-size: 16px;
    line-height: 1.7;
    min-height: 100vh;
}

a {
    color: var(--vt-main);
    text-decoration: none;
    transition: color .2s ease;
}

a:hover {
    color: var(--vt-mint-deep);
}

/* ---------- шапка ---------- */
.header_bar_vt {
    padding: 17px 20px;
    background: rgba(247, 249, 253, .92);
    border-bottom: 1px solid var(--vt-edge);
    backdrop-filter: blur(14px);
}

.header_bar_vt__inner {
    max-width: 1080px;
    margin: 0 auto;
    text-align: center;
}

.header_bar_vt__name {
    font-family: var(--vt-ui);
    font-size: 19px;
    font-weight: 700;
    letter-spacing: .14em;
    color: var(--vt-deep);
    text-transform: lowercase;
}

/* ---------- вступна секція (вирівняна вліво) ---------- */
.doc_intro_vt {
    max-width: 1080px;
    margin: 0 auto;
    padding: 56px 24px 30px;
    text-align: left;
}

.doc_intro_vt__tag {
    display: inline-block;
    padding: 5px 14px;
    margin-bottom: 16px;
    border-radius: 999px;
    background: #e7fbf6;
    border: 1px solid #b6ecdf;
    font-family: var(--vt-ui);
    font-size: 11px;
    font-weight: 700;
    letter-spacing: .16em;
    text-transform: uppercase;
    color: var(--vt-mint-deep);
}

.doc_intro_vt__title {
    max-width: 780px;
    margin: 0 0 14px;
    font-size: clamp(28px, 4.4vw, 46px);
    line-height: 1.12;
    font-weight: 700;
    color: var(--vt-deep);
}

.doc_intro_vt__sub {
    max-width: 660px;
    font-family: var(--vt-ui);
    font-size: 14px;
    line-height: 1.8;
    color: var(--vt-mute);
}

.doc_intro_vt__stamp {
    margin-top: 16px;
    padding-left: 14px;
    border-left: 4px solid var(--vt-mint);
    font-family: var(--vt-ui);
    font-size: 13px;
    color: var(--vt-ink);
}

/* ---------- таймлайн ---------- */
.doc_track_vt {
    position: relative;
    max-width: 1080px;
    margin: 0 auto;
    padding: 10px 24px 70px 24px;
}

.doc_track_vt::before {
    content: "";
    position: absolute;
    left: 45px;
    top: 0;
    bottom: 70px;
    width: 2px;
    border-radius: 2px;
    background: linear-gradient(180deg, var(--vt-mint) 0%, var(--vt-main) 45%, rgba(47, 71, 168, .12) 100%);
}

.step_row_vt {
    position: relative;
    display: grid;
    grid-template-columns: 44px 1fr;
    gap: 24px;
    align-items: start;
    padding: 0 0 34px 0;
}

.step_dot_vt {
    position: relative;
    z-index: 2;
    width: 44px;
    height: 44px;
    border-radius: 50%;
    display: grid;
    place-items: center;
    font-family: var(--vt-ui);
    font-size: 15px;
    font-weight: 700;
    color: #ffffff;
    background: linear-gradient(140deg, var(--vt-mint) 0%, var(--vt-main) 100%);
    box-shadow: 0 0 0 6px var(--vt-back), var(--vt-lift1);
}

.step_pane_vt {
    padding-top: 3px;
    min-width: 0;
}

.step_head_vt {
    margin: 4px 0 12px;
    font-size: clamp(20px, 2.4vw, 27px);
    line-height: 1.2;
    font-weight: 700;
    color: var(--vt-deep);
}

.step_pane_vt p {
    margin-bottom: 13px;
    font-family: var(--vt-ui);
    font-size: 14px;
    line-height: 1.85;
    color: var(--vt-mute);
}

.step_pane_vt p:last-child {
    margin-bottom: 0;
}

.step_pane_vt strong {
    color: var(--vt-ink);
}

.step_list_vt {
    margin: 0 0 15px;
    padding: 0;
    list-style: none;
    font-family: var(--vt-ui);
    font-size: 14px;
    line-height: 1.8;
    color: var(--vt-mute);
}

.step_list_vt li {
    position: relative;
    padding-left: 22px;
    margin-bottom: 8px;
}

.step_list_vt li::before {
    content: "";
    position: absolute;
    left: 2px;
    top: 10px;
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--vt-mint);
    box-shadow: 0 0 0 3px rgba(34, 201, 171, .18);
}

/* ---------- широкі тоновані смуги-нотатки ---------- */
.note_strip_vt {
    position: relative;
    margin: 16px 0 18px;
    padding: 16px 20px 16px 22px;
    border-radius: 0 var(--vt-r2) var(--vt-r2) 0;
    border-left: 5px solid var(--vt-mint);
    background: linear-gradient(90deg, rgba(34, 201, 171, .16) 0%, rgba(47, 71, 168, .07) 55%, rgba(255, 255, 255, .5) 100%);
    font-family: var(--vt-ui);
    font-size: 14px;
    line-height: 1.75;
    color: var(--vt-ink);
}

.note_strip_vt--deep {
    border-left-color: var(--vt-main);
    background: linear-gradient(90deg, rgba(47, 71, 168, .15) 0%, rgba(34, 201, 171, .07) 55%, rgba(255, 255, 255, .5) 100%);
}

.note_strip_vt__key {
    display: block;
    margin-bottom: 4px;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: .12em;
    text-transform: uppercase;
    color: var(--vt-deep);
}

.note_strip_vt p {
    margin: 0;
    font-size: 14px;
    color: var(--vt-ink);
}

/* ---------- список визначень у два стовпці ---------- */
.def_list_vt {
    display: grid;
    grid-template-columns: minmax(180px, 34%) 1fr;
    gap: 0;
    margin: 18px 0 20px;
    border: 1px solid var(--vt-edge);
    border-radius: var(--vt-r2);
    overflow: hidden;
    background: var(--vt-panel);
    box-shadow: var(--vt-lift1);
    font-family: var(--vt-ui);
}

.def_term_vt {
    padding: 13px 16px;
    border-bottom: 1px solid var(--vt-edge);
    background: #f4f7fd;
    font-size: 13px;
    font-weight: 700;
    line-height: 1.6;
    color: var(--vt-deep);
}

.def_desc_vt {
    margin: 0;
    padding: 13px 18px;
    border-bottom: 1px solid var(--vt-edge);
    font-size: 13px;
    line-height: 1.75;
    color: var(--vt-mute);
}

.def_list_vt > .def_term_vt:nth-last-child(2),
.def_list_vt > .def_desc_vt:last-child {
    border-bottom: 0;
}

/* ---------- підвал ---------- */
.footer_bar_vt {
    margin-top: 20px;
    padding: 22px 20px 18px;
    background: #eaeef8;
    border-top: 1px solid var(--vt-edge);
    text-align: center;
    font-family: var(--vt-ui);
}

.footer_bar_vt__inner {
    max-width: 900px;
    margin: 0 auto;
}

.footer_bar_vt__nav {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 6px 20px;
    margin-bottom: 12px;
}

.footer_bar_vt__nav a {
    color: var(--vt-main);
    font-size: 11px;
}

.footer_bar_vt__nav a:hover {
    text-decoration: underline;
}

.footer_note_vt {
    font-size: 11px;
    color: var(--vt-mute);
}

.footer_legal_vt {
    max-width: 820px;
    margin: 12px auto 0;
    padding-top: 12px;
    border-top: 1px solid rgba(27, 42, 107, .12);
    font-size: 11px;
    line-height: 1.65;
    color: #7b849c;
}

@media (max-width: 720px) {
    .doc_track_vt {
        padding: 6px 18px 56px 18px;
    }

    .doc_track_vt::before {
        left: 17px;
    }

    .step_row_vt {
        grid-template-columns: 36px 1fr;
        gap: 16px;
    }

    .step_dot_vt {
        width: 36px;
        height: 36px;
        font-size: 13px;
        box-shadow: 0 0 0 5px var(--vt-back), var(--vt-lift1);
    }

    .def_list_vt {
        grid-template-columns: 1fr;
    }

    .def_term_vt {
        border-bottom: 0;
        padding-bottom: 4px;
        background: transparent;
    }

    .def_desc_vt {
        padding-top: 2px;
    }

    .doc_intro_vt {
        padding: 42px 18px 24px;
    }
}