/**
 * WBILL LANDING PAGE
 * Public front door — reuses design tokens from wbill-template-standard.css
 * (--ink, --flow, --canvas, --paper, --line, --warning-color, --danger-color, --success-color).
 */

.landing * { box-sizing: border-box; }

.landing { background: var(--canvas); }

.landing h1, .landing h2, .landing h3 {
    font-family: var(--font-display);
    color: var(--ink);
    text-wrap: balance;
    margin: 0;
    letter-spacing: -0.01em;
}

.landing p { margin: 0; }
.landing a { color: inherit; text-decoration: none; }

.landing .wrap {
    max-width: 1080px;
    margin: 0 auto;
    padding-inline: 24px;
}

/* ===== NAV ===== */
.landing-nav {
    position: sticky;
    top: 0;
    z-index: 20;
    background: rgba(255,255,255,0.9);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--line);
}

.landing-nav-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding-block: 14px;
    gap: 16px;
}

.landing-brand { display: flex; align-items: center; gap: 10px; }

.landing-brand-mark {
    width: 28px; height: 28px;
    border-radius: 6px;
    background: var(--flow);
    position: relative;
    flex-shrink: 0;
}

.landing-brand-mark::after {
    content: "";
    position: absolute;
    left: 7px; top: 6px;
    width: 10px; height: 13px;
    background: #fff;
    clip-path: polygon(50% 0%, 100% 65%, 100% 100%, 0 100%, 0 65%);
}

.landing-brand-name {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 16px;
}

.landing-nav-links {
    display: flex;
    gap: 26px;
    font-size: 14px;
    font-weight: 500;
    color: var(--ink-soft);
}

.landing-nav-links a:hover { color: var(--flow); }

.landing .btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 11px 20px;
    border-radius: var(--radius-sm, 6px);
    font-size: 14px;
    font-weight: 600;
    border: 1px solid transparent;
    cursor: pointer;
    white-space: nowrap;
}

.landing .btn-primary { background: var(--flow); color: #fff; }
.landing .btn-primary:hover { background: var(--flow-dark); }
.landing .btn-ghost { background: transparent; color: var(--ink); border-color: var(--line); }
.landing .btn-ghost:hover { border-color: var(--flow); color: var(--flow); }
.landing .btn-sm { padding: 8px 14px; font-size: 13px; }

/* ===== HERO ===== */
.landing-hero { padding-block: 64px 56px; }

.landing-hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    gap: 48px;
    align-items: center;
}

.landing-hero h1 {
    font-size: clamp(30px, 4.4vw, 46px);
    font-weight: 700;
    line-height: 1.12;
}

.landing-hero-sub {
    margin-top: 18px;
    font-size: 17px;
    color: var(--ink-soft);
    max-width: 46ch;
    line-height: 1.65;
}

.landing-hero-ctas { margin-top: 30px; display: flex; gap: 12px; flex-wrap: wrap; }
.landing-hero-note { margin-top: 22px; font-size: 13px; color: var(--ink-faint); }

/* Signature ledger card */
.ledger-card {
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: 10px;
    padding: 22px 24px 0;
    box-shadow: 0 20px 44px -24px rgba(14,42,50,0.35);
    overflow: hidden;
}

.ledger-head {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding-bottom: 14px;
    border-bottom: 1px solid var(--line);
}

.ledger-head .eyebrow {
    font-family: var(--font-mono);
    font-size: 11px;
    letter-spacing: 0.06em;
    color: var(--ink-faint);
    text-transform: uppercase;
}

.ledger-head .unit { font-family: var(--font-display); font-weight: 700; font-size: 18px; }

.ledger-row {
    display: flex;
    justify-content: space-between;
    padding: 11px 0;
    border-bottom: 1px dashed var(--line);
    font-size: 13.5px;
}

.ledger-row:last-of-type { border-bottom: none; }
.ledger-row .label { color: var(--ink-soft); }
.ledger-row .val { font-family: var(--font-mono); }

.ledger-total {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    padding: 16px 0 18px;
    margin-top: 4px;
    border-top: 1px solid var(--line);
}

.ledger-total .label { font-weight: 600; font-size: 14px; }
.ledger-total .val { font-family: var(--font-mono); font-size: 24px; font-weight: 600; }

.ledger-pill {
    display: inline-block;
    padding: 3px 10px;
    border-radius: 4px;
    font-size: 11.5px;
    font-weight: 600;
    background: var(--warning-pale, #FBF2E3);
    color: var(--warning-color);
}

.ledger-bar { height: 3px; margin: 0 -24px; background: var(--flow); }

.ledger-caption { margin-top: 14px; font-size: 12.5px; color: var(--ink-faint); text-align: center; }

/* ===== SECTIONS ===== */
.landing section { padding-block: 56px; }
.landing .section-tight { padding-block: 44px; }
.landing .section-head { max-width: 60ch; margin-bottom: 34px; }
.landing .section-head h2 { font-size: clamp(24px, 3vw, 30px); font-weight: 700; }
.landing .section-head p { margin-top: 10px; color: var(--ink-soft); font-size: 15.5px; }
.landing .divider { border: none; border-top: 1px solid var(--line); margin: 0; }
.landing .band { background: var(--paper); border-top: 1px solid var(--line); border-bottom: 1px solid var(--line); }

/* ===== PROBLEMS ===== */
.problem-grid { display: grid; grid-template-columns: 1fr 1fr; gap: 0 40px; }
.problem-item { padding-block: 18px; border-top: 1px solid var(--line); }

.problem-item h3 {
    font-size: 15px;
    font-weight: 600;
    display: flex;
    align-items: baseline;
    gap: 8px;
}

.problem-item h3::before {
    content: "";
    width: 6px; height: 6px;
    border-radius: 50%;
    background: var(--danger-color);
    flex-shrink: 0;
    transform: translateY(-2px);
}

.problem-item p { margin-top: 6px; font-size: 14px; color: var(--ink-soft); line-height: 1.55; }

/* ===== PROCESS ===== */
.process {
    display: grid;
    grid-template-columns: repeat(6, 1fr);
    gap: 2px;
    background: var(--line);
    border: 1px solid var(--line);
    border-radius: 10px;
    overflow: hidden;
}

.process-step { background: var(--paper); padding: 20px 16px; }
.process-step .n { font-family: var(--font-mono); font-size: 12px; color: var(--flow); font-weight: 600; }
.process-step h3 { margin-top: 10px; font-size: 14px; font-weight: 600; }
.process-step p { margin-top: 6px; font-size: 12.5px; color: var(--ink-soft); line-height: 1.5; }

/* ===== MODULES ===== */
.module-grid { display: grid; grid-template-columns: repeat(3, 1fr); }
.module-item { padding: 22px 22px 22px 0; border-top: 1px solid var(--line); }
.module-grid .module-item:nth-child(3n) { padding-right: 0; }
.module-item h3 { font-size: 15.5px; font-weight: 600; }
.module-item p { margin-top: 7px; font-size: 13.5px; color: var(--ink-soft); line-height: 1.55; }

/* ===== MENU MOCKUP ===== */
.menu-section-grid { display: grid; grid-template-columns: 260px 1fr; gap: 40px; align-items: start; }

.menu-mock {
    background: var(--ink);
    border-radius: 10px;
    padding: 14px 0;
    border: 1px solid var(--line);
}

.menu-mock .group-label {
    padding: 14px 18px 6px;
    font-size: 10.5px;
    letter-spacing: 0.07em;
    text-transform: uppercase;
    color: rgba(255,255,255,0.4);
    font-weight: 700;
}

.menu-mock .item { padding: 9px 18px; font-size: 13px; color: rgba(255,255,255,0.82); border-left: 3px solid transparent; }

.menu-mock .item.top {
    color: #fff;
    font-weight: 600;
    border-left-color: var(--flow);
    background: rgba(255,255,255,0.06);
}

.rationale-list { display: flex; flex-direction: column; gap: 20px; }
.rationale-item h3 { font-size: 14.5px; font-weight: 600; display: flex; align-items: center; gap: 8px; }

.rationale-item .tag {
    font-family: var(--font-mono);
    font-size: 11px;
    color: var(--flow);
    background: var(--flow-pale);
    padding: 2px 8px;
    border-radius: 4px;
}

.rationale-item p { margin-top: 6px; font-size: 13.5px; color: var(--ink-soft); line-height: 1.6; }

/* ===== SECURITY ===== */
.security-grid { display: grid; grid-template-columns: repeat(4, 1fr); gap: 20px; }

.security-item {
    padding: 20px;
    background: var(--paper);
    border: 1px solid var(--line);
    border-radius: 8px;
}

.security-item .k { font-family: var(--font-mono); font-size: 11px; color: var(--flow); text-transform: uppercase; letter-spacing: 0.05em; }
.security-item h3 { margin-top: 8px; font-size: 14.5px; font-weight: 600; }
.security-item p { margin-top: 6px; font-size: 13px; color: var(--ink-soft); line-height: 1.55; }

/* ===== CLOSING ===== */
.landing-closing { background: var(--ink); color: var(--canvas); padding-block: 64px; }
.landing-closing .wrap { text-align: center; }
.landing-closing h2 { color: #fff; font-size: clamp(24px, 3.4vw, 34px); max-width: 24ch; margin-inline: auto; }
.landing-closing p { margin-top: 16px; color: rgba(244,247,247,0.68); font-size: 15.5px; max-width: 52ch; margin-inline: auto; line-height: 1.65; }
.landing-closing .landing-hero-ctas { justify-content: center; margin-top: 28px; }
.landing-closing .btn-ghost { border-color: rgba(255,255,255,0.25); color: #fff; }
.landing-closing .btn-ghost:hover { border-color: var(--flow); color: var(--flow); }

.landing-closing .status-line {
    margin-top: 30px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 12.5px;
    color: rgba(244,247,247,0.55);
    font-family: var(--font-mono);
}

.landing-closing-grid {
    display: grid;
    grid-template-columns: 1.05fr 0.95fr;
    align-items: center;
    gap: 40px;
}

.landing-closing-grid .landing-closing-copy { text-align: left; }
.landing-closing-copy h2 { margin-inline: 0; }
.landing-closing-copy p { margin-inline: 0; }
.landing-closing-copy .landing-hero-ctas { justify-content: flex-start; }
.landing-closing-copy .status-line { display: flex; }

.landing-closing-photo { display: flex; justify-content: center; }

.landing-closing-photo img {
    display: block;
    width: 100%;
    max-width: 320px;
    height: auto;
    border-radius: 14px;
}

.status-dot { width: 7px; height: 7px; border-radius: 50%; background: var(--success-color); }

.landing-footer { padding-block: 22px; text-align: center; font-size: 12.5px; color: var(--ink-faint); }

/* ===== RESPONSIVE ===== */
@media (max-width: 860px) {
    .landing-hero-grid { grid-template-columns: 1fr; }
    .problem-grid { grid-template-columns: 1fr; }
    .module-grid { grid-template-columns: 1fr 1fr; }
    .module-grid .module-item:nth-child(3n) { padding-right: 22px; }
    .module-grid .module-item:nth-child(2n) { padding-right: 0; }
    .process { grid-template-columns: repeat(3, 1fr); }
    .menu-section-grid { grid-template-columns: 1fr; }
    .security-grid { grid-template-columns: 1fr 1fr; }
    .landing-nav-links { display: none; }

    .landing-closing-grid { grid-template-columns: 1fr; gap: 32px; }
    .landing-closing-photo { order: -1; }
    .landing-closing-photo img { max-width: 220px; }
    .landing-closing-grid .landing-closing-copy { text-align: center; }
    .landing-closing-copy .landing-hero-ctas { justify-content: center; }
    .landing-closing-copy .status-line { justify-content: center; }
}

@media (max-width: 480px) {
    .module-grid { grid-template-columns: 1fr; }
    .module-grid .module-item { padding-right: 0 !important; }
    .process { grid-template-columns: 1fr 1fr; }
    .security-grid { grid-template-columns: 1fr; }
    .landing-hero-ctas .btn { flex: 1; }
}