/* Bahati Smart Gas Utility — Design System (Section 2 of content spec) */

:root {
    /* 2.2 Color tokens */
    --color-navy: #0A2540;
    --color-navy-dark: #071A2E;
    --color-orange: #FF5722;
    --color-amber: #FFB300;
    --color-ink: #1A1A1A;
    --color-grey: #5B6472;
    --color-surface: #F2F4F7;
    --color-white: #FFFFFF;
    --color-success: #1FAA59;
    --color-danger: #D92D20;
    --color-line: #E4E7EC;

    /* 2.4 Layout & spacing */
    --space-1: 8px;
    --space-2: 16px;
    --space-3: 24px;
    --space-4: 32px;
    --space-6: 48px;
    --space-8: 64px;
    --space-12: 96px;
    --space-16: 128px;
    --radius: 16px;
    --radius-sm: 8px;
    --max-width: 1280px;

    /* 2.3 Typography */
    --font-display: 'Plus Jakarta Sans', 'Clash Display', -apple-system, sans-serif;
    --font-body: 'Inter', 'SF Pro Text', -apple-system, sans-serif;
    --font-mono: 'JetBrains Mono', ui-monospace, monospace;
}

* { box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    margin: 0;
    font-family: var(--font-body);
    font-size: 17px;
    line-height: 1.6;
    color: var(--color-ink);
    background: var(--color-white);
    -webkit-font-smoothing: antialiased;
}

img { max-width: 100%; display: block; }
a { color: inherit; text-decoration: none; }

.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 var(--space-3);
}

h1, h2, h3, h4 {
    font-family: var(--font-display);
    margin: 0 0 var(--space-2);
    color: var(--color-navy);
}
h1 { font-size: 36px; font-weight: 700; line-height: 1.1; }
h2 { font-size: 28px; font-weight: 700; line-height: 1.2; }
h3 { font-size: 20px; font-weight: 600; line-height: 1.3; }
@media (min-width: 860px) {
    h1 { font-size: 56px; }
    h2 { font-size: 36px; }
    h3 { font-size: 24px; }
}
p { margin: 0 0 var(--space-2); color: var(--color-ink); max-width: 68ch; }
.on-dark p, .on-dark h1, .on-dark h2, .on-dark h3, .on-dark li, .on-dark span { color: #fff; }
.on-dark .text-muted { color: rgba(255,255,255,.72); }
.text-muted { color: var(--color-grey); }
.mono { font-family: var(--font-mono); }
.caption { font-size: 13px; font-weight: 500; letter-spacing: .01em; color: var(--color-grey); }

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-family: var(--font-mono);
    font-size: 13px;
    font-weight: 500;
    letter-spacing: .04em;
    text-transform: uppercase;
    color: var(--color-orange);
    margin-bottom: var(--space-2);
}
.eyebrow::before { content: ""; width: 8px; height: 8px; border-radius: 50%; background: var(--color-amber); }
.on-dark .eyebrow { color: var(--color-amber); }

/* Focus ring per 8.3 */
a:focus-visible, button:focus-visible, input:focus-visible, textarea:focus-visible, select:focus-visible {
    outline: 3px solid var(--color-orange);
    outline-offset: 3px;
}

/* Sections & rhythm */
section { padding: var(--space-8) 0; }
@media (min-width: 860px) { section { padding: var(--space-12) 0; } }
.section-surface { background: var(--color-surface); }
.section-navy { background: var(--color-navy); }
.section-head { max-width: 720px; margin: 0 auto var(--space-6); text-align: center; }
.section-head.left { margin: 0 0 var(--space-6); text-align: left; }

/* Grid helpers */
.grid-2 { display: grid; grid-template-columns: 1fr; gap: var(--space-3); }
.grid-3 { display: grid; grid-template-columns: 1fr; gap: var(--space-3); }
.grid-4 { display: grid; grid-template-columns: 1fr; gap: var(--space-3); }
@media (min-width: 700px) {
    .grid-2 { grid-template-columns: 1fr 1fr; }
    .grid-4 { grid-template-columns: 1fr 1fr; }
}
@media (min-width: 960px) {
    .grid-3 { grid-template-columns: repeat(3, 1fr); }
    .grid-4 { grid-template-columns: repeat(4, 1fr); }
}

/* Bento card */
.bento {
    background: var(--color-white);
    border: 1px solid var(--color-line);
    border-radius: var(--radius);
    padding: var(--space-4);
}
.on-dark .bento, .section-navy .bento {
    background: rgba(255,255,255,.04);
    border-color: rgba(255,255,255,.14);
    box-shadow: inset 0 0 0 1px rgba(255,255,255,.03);
}
.bento h3 { margin-bottom: 8px; }
.bento .icon-badge {
    width: 48px; height: 48px;
    border-radius: 12px;
    display: flex; align-items: center; justify-content: center;
    background: rgba(255,87,34,.1);
    color: var(--color-orange);
    margin-bottom: var(--space-2);
}
.on-dark .bento .icon-badge { background: rgba(255,179,0,.14); color: var(--color-amber); }
.bento .icon-badge svg { width: 24px; height: 24px; stroke: currentColor; fill: none; stroke-width: 2; }

/* Metric strip */
.metric-strip {
    display: flex;
    gap: var(--space-2);
    overflow-x: auto;
    padding-bottom: 4px;
    -webkit-overflow-scrolling: touch;
}
.metric-card {
    flex: 0 0 auto;
    min-width: 190px;
    background: rgba(255,255,255,.04);
    border: 1px solid rgba(255,255,255,.14);
    border-radius: var(--radius);
    padding: var(--space-3);
}
.metric-card strong {
    display: block;
    font-family: var(--font-mono);
    font-size: 28px;
    color: var(--color-amber);
    margin-bottom: 4px;
}
.metric-card span { font-size: 13px; color: rgba(255,255,255,.72); }

/* Buttons — dual CTA pair (2.6) */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 24px;
    min-height: 44px;
    border-radius: var(--radius-sm);
    font-family: var(--font-body);
    font-weight: 600;
    font-size: 16px;
    border: 1px solid transparent;
    cursor: pointer;
    transition: transform .15s ease, background-color .15s ease, border-color .15s ease;
    white-space: nowrap;
}
.btn:hover { transform: translateY(-1px); }
.btn-primary { background: var(--color-orange); color: #fff; }
.btn-primary:hover { background: #E64A19; }
.btn-secondary {
    background: rgba(255,255,255,.1);
    border: 1px solid rgba(255,255,255,.3);
    color: #fff;
}
.btn-secondary:hover { background: rgba(255,255,255,.18); }
.btn-outline-navy { background: transparent; border: 1px solid var(--color-navy); color: var(--color-navy); }
.btn-outline-navy:hover { background: var(--color-navy); color: #fff; }
.btn-block { width: 100%; }
.cta-pair { display: flex; flex-direction: column; gap: var(--space-2); }
@media (min-width: 560px) { .cta-pair { flex-direction: row; } }

/* Header / nav */
.site-header {
    position: sticky; top: 0; z-index: 50;
    background: rgba(255,255,255,.94);
    backdrop-filter: blur(8px);
    border-bottom: 1px solid var(--color-line);
}
.nav { display: flex; align-items: center; justify-content: space-between; padding: 14px 0; }
.brand img { height: 32px; }
.nav-links { display: none; list-style: none; margin: 0; padding: 0; align-items: center; gap: var(--space-3); }
.nav-links a { font-weight: 600; font-size: 15px; color: var(--color-ink); }
.nav-links a:hover, .nav-links a.active { color: var(--color-orange); }
.nav-toggle { background: none; border: none; font-size: 26px; color: var(--color-navy); cursor: pointer; min-width: 44px; min-height: 44px; }
@media (min-width: 1080px) {
    .nav-links { display: flex; }
    .nav-toggle { display: none; }
}
.nav-mobile-panel {
    display: none;
    border-top: 1px solid var(--color-line);
    background: #fff;
}
.nav-mobile-panel.open { display: block; }
.nav-mobile-panel ul { list-style: none; margin: 0; padding: var(--space-2) var(--space-3); display: grid; gap: 4px; }
.nav-mobile-panel a { display: block; padding: 12px 4px; font-weight: 600; border-bottom: 1px solid var(--color-line); }
@media (min-width: 1080px) { .nav-mobile-panel { display: none !important; } }

/* Trust badge row */
.badge-row { display: flex; flex-wrap: wrap; gap: var(--space-3); align-items: center; justify-content: center; }
.badge-item {
    display: flex; flex-direction: column; align-items: center; gap: 6px;
    filter: grayscale(1); opacity: .6;
    transition: filter .15s ease, opacity .15s ease;
    background: none; border: none; cursor: pointer; font-family: var(--font-body);
    min-width: 44px; min-height: 44px; padding: 4px;
}
.badge-item:hover, .badge-item:focus-visible { filter: grayscale(0); opacity: 1; }
.badge-item .badge-icon {
    width: 44px; height: 44px; border-radius: 50%;
    background: var(--color-surface);
    display: flex; align-items: center; justify-content: center;
    color: var(--color-navy);
}
.badge-item .badge-icon svg { width: 22px; height: 22px; stroke: currentColor; fill: none; stroke-width: 2; }
.badge-item .badge-label { font-size: 12px; font-weight: 600; color: var(--color-grey); }

/* Modal (badge explainer) */
.modal-backdrop {
    display: none;
    position: fixed; inset: 0;
    background: rgba(10,37,64,.6);
    z-index: 100;
    align-items: center; justify-content: center;
    padding: var(--space-3);
}
.modal-backdrop.open { display: flex; }
.modal-box {
    background: #fff; border-radius: var(--radius);
    max-width: 480px; width: 100%; padding: var(--space-4);
    position: relative;
}
.modal-close { position: absolute; top: 12px; right: 12px; background: none; border: none; font-size: 22px; cursor: pointer; min-width: 44px; min-height: 44px; }

/* Cards */
.card {
    background: #fff;
    border: 1px solid var(--color-line);
    border-radius: var(--radius);
    padding: var(--space-4);
}
.pillar-list { list-style: none; margin: 0; padding: 0; display: grid; gap: var(--space-3); }
.pillar-list li { display: flex; gap: var(--space-2); align-items: flex-start; }
.pillar-list .num {
    flex-shrink: 0; width: 32px; height: 32px; border-radius: 50%;
    background: var(--color-navy); color: #fff; font-family: var(--font-mono); font-weight: 600;
    display: flex; align-items: center; justify-content: center; font-size: 14px;
}

/* Cost comparison segmented control + table */
.seg-control { display: inline-flex; border: 1px solid var(--color-line); border-radius: 999px; padding: 4px; gap: 4px; }
.seg-control button {
    border: none; background: none; padding: 10px 18px; border-radius: 999px;
    font-family: var(--font-body); font-weight: 600; font-size: 14px; cursor: pointer; color: var(--color-grey);
    min-height: 40px;
}
.seg-control button[aria-selected="true"] { background: var(--color-navy); color: #fff; }
.compare-table { width: 100%; border-collapse: collapse; margin-top: var(--space-3); }
.compare-table th, .compare-table td { text-align: left; padding: 14px 12px; border-bottom: 1px solid var(--color-line); }
.compare-table th { font-family: var(--font-mono); font-size: 12px; text-transform: uppercase; letter-spacing: .04em; color: var(--color-grey); }
.compare-bar-row { display: flex; align-items: center; gap: var(--space-2); margin: var(--space-1) 0; }
.compare-bar-label { width: 110px; flex-shrink: 0; font-weight: 600; font-size: 14px; }
.compare-bar-track { flex: 1; background: var(--color-surface); border-radius: 999px; height: 14px; overflow: hidden; }
.compare-bar-fill { height: 100%; border-radius: 999px; background: var(--color-orange); transition: width .4s ease; }
.compare-bar-value { width: 90px; text-align: right; font-family: var(--font-mono); font-size: 13px; flex-shrink: 0; }

/* Demand meter ring */
.demand-meter { display: flex; align-items: center; gap: var(--space-3); }
.demand-ring {
    width: 96px; height: 96px; border-radius: 50%;
    display: flex; align-items: center; justify-content: center;
    background: conic-gradient(var(--color-orange) calc(var(--pct, 0) * 1%), var(--color-surface) 0);
    flex-shrink: 0;
}
.demand-ring::after {
    content: attr(data-label);
    width: 76px; height: 76px; border-radius: 50%; background: #fff;
    display: flex; align-items: center; justify-content: center;
    font-family: var(--font-mono); font-weight: 700; font-size: 15px; color: var(--color-navy);
}

/* Forms */
.field { margin-bottom: var(--space-3); }
.field label { display: block; font-weight: 600; font-size: 14px; margin-bottom: 6px; }
.field .hint { font-weight: 400; color: var(--color-grey); font-size: 13px; }
.field input, .field select, .field textarea {
    width: 100%;
    padding: 12px 14px;
    min-height: 44px;
    border: 1.5px solid var(--color-line);
    border-radius: var(--radius-sm);
    font: inherit;
    background: #fff;
    color: var(--color-ink);
}
.field textarea { min-height: 100px; resize: vertical; }
.field.has-error input, .field.has-error select, .field.has-error textarea { border-color: var(--color-danger); }
.field .error-msg { color: var(--color-danger); font-size: 13px; margin-top: 6px; }
.field-check { display: flex; align-items: flex-start; gap: 10px; }
.field-check input { width: 20px; height: 20px; flex-shrink: 0; margin-top: 2px; }
.field-check label { font-weight: 400; font-size: 14px; }
.form-row { display: grid; grid-template-columns: 1fr; gap: var(--space-3); }
@media (min-width: 620px) { .form-row { grid-template-columns: 1fr 1fr; } }

.alert { border-radius: var(--radius-sm); padding: 14px 18px; margin-bottom: var(--space-3); font-weight: 600; font-size: 15px; }
.alert-success { background: #E9F9EF; color: #16693F; border: 1px solid #BEEACB; }
.alert-error { background: #FDECEC; color: #A81F16; border: 1px solid #F6C6C6; }
.alert-info { background: #FFF3E0; color: #8A4B00; border: 1px solid #FFD9A8; }
[aria-live] { min-height: 1px; }

/* Wizard */
.wizard-progress { display: flex; gap: 6px; margin-bottom: var(--space-4); }
.wizard-progress .dot { flex: 1; height: 6px; border-radius: 3px; background: var(--color-line); }
.wizard-progress .dot.active { background: var(--color-orange); }
.wizard-step { display: none; }
.wizard-step.active { display: block; }
.wizard-nav { display: flex; justify-content: space-between; gap: var(--space-2); margin-top: var(--space-3); }

/* Trust / compliance matrix table */
.matrix-table { width: 100%; border-collapse: collapse; }
.matrix-table th, .matrix-table td { text-align: left; padding: 14px; border: 1px solid var(--color-line); vertical-align: top; }
.matrix-table th { background: var(--color-surface); font-family: var(--font-mono); font-size: 12px; text-transform: uppercase; letter-spacing: .03em; }
.table-scroll { overflow-x: auto; }

/* Resource card */
.resource-card { display: flex; flex-direction: column; gap: 8px; }
.resource-card .meta { display: flex; gap: 10px; align-items: center; color: var(--color-grey); font-size: 13px; }

/* Footer */
.site-footer { background: var(--color-navy); color: rgba(255,255,255,.75); padding-top: var(--space-8); }
.footer-grid { display: grid; grid-template-columns: 1fr; gap: var(--space-4); padding-bottom: var(--space-4); border-bottom: 1px solid rgba(255,255,255,.12); }
@media (min-width: 700px) { .footer-grid { grid-template-columns: 1.3fr 1fr 1fr 1fr; } }
.site-footer h4 { color: #fff; font-size: 13px; text-transform: uppercase; letter-spacing: .04em; margin-bottom: var(--space-2); font-family: var(--font-mono); }
.site-footer ul { list-style: none; margin: 0; padding: 0; display: grid; gap: 10px; }
.site-footer a:hover { color: var(--color-amber); }
.footer-badges { padding: var(--space-4) 0; border-bottom: 1px solid rgba(255,255,255,.12); }
.footer-bottom { display: flex; flex-wrap: wrap; justify-content: space-between; gap: var(--space-2); padding: var(--space-3) 0; font-size: 13px; color: rgba(255,255,255,.5); }

/* Toggle (currency) */
.toggle-pair { display: inline-flex; border: 1px solid rgba(255,255,255,.3); border-radius: 999px; padding: 4px; }
.toggle-pair button { border: none; background: none; padding: 8px 16px; border-radius: 999px; font-weight: 600; font-size: 13px; color: rgba(255,255,255,.7); cursor: pointer; }
.toggle-pair button[aria-pressed="true"] { background: var(--color-amber); color: var(--color-navy); }

@media (prefers-reduced-motion: reduce) {
    * { animation-duration: 0.001ms !important; animation-iteration-count: 1 !important; transition-duration: 0.001ms !important; scroll-behavior: auto !important; }
}