/* PapChap site styles. No external fonts or frameworks: the system font stack covers Latin, Cyrillic and Hebrew.
   Horizontal offsets use logical properties (inline-start/end), so the layout mirrors for dir="rtl". */

:root {
    --font: system-ui, -apple-system, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    --mono: ui-monospace, SFMono-Regular, Menlo, Consolas, "Liberation Mono", monospace;

    --bg: #ffffff;
    --bg-soft: #f5f7fb;
    --surface: #ffffff;
    --text: #0f172a;
    --muted: #4f5d73;
    --border: #e2e7f0;
    --accent: #2448d8;
    --accent-hover: #1b38b4;
    --accent-soft: #eaefff;
    --accent-contrast: #ffffff;
    --success: #15803d;
    --success-soft: #ecfdf3;
    --danger: #c0262d;
    --danger-soft: #fff1f1;
    --shadow: 0 14px 36px -18px rgba(15, 23, 42, .28);

    --radius: 16px;
    --header-height: 68px;
}

@media (prefers-color-scheme: dark) {
    :root {
        --bg: #0b1020;
        --bg-soft: #10172c;
        --surface: #131b33;
        --text: #e7ebf4;
        --muted: #a0abc0;
        --border: #253051;
        --accent: #8aa4ff;
        --accent-hover: #a9bcff;
        --accent-soft: #1b2654;
        --accent-contrast: #0b1020;
        --success: #4ade80;
        --success-soft: #0f2a1c;
        --danger: #ff8a8a;
        --danger-soft: #2f1418;
        --shadow: 0 14px 36px -18px rgba(0, 0, 0, .7);
    }
}

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

html { -webkit-text-size-adjust: 100%; scroll-padding-top: calc(var(--header-height) + 16px); }

@media (prefers-reduced-motion: no-preference) {
    html { scroll-behavior: smooth; }
}

body {
    margin: 0;
    font: 16px/1.6 var(--font);
    color: var(--text);
    background: var(--bg);
    -webkit-font-smoothing: antialiased;
}

img, svg { display: block; max-width: 100%; }
a { color: var(--accent); text-underline-offset: 3px; }
a:hover { color: var(--accent-hover); }
p { margin: 0 0 1em; }
:focus-visible { outline: 2px solid var(--accent); outline-offset: 3px; border-radius: 4px; }

h1, h2, h3 { line-height: 1.2; letter-spacing: -.02em; margin: 0 0 .5em; }
h1 { font-size: clamp(2.1rem, 4.6vw, 3.4rem); line-height: 1.08; letter-spacing: -.035em; }
h2 { font-size: clamp(1.6rem, 3vw, 2.2rem); }
h3 { font-size: 1.125rem; letter-spacing: -.01em; }

.container { width: 100%; max-width: 1160px; margin: 0 auto; padding: 0 24px; }
.muted { color: var(--muted); }
.small { font-size: .875rem; }

.skip-link {
    position: absolute; inset-inline-start: 16px; top: -100px; z-index: 100;
    padding: 10px 16px; border-radius: 8px; background: var(--accent); color: var(--accent-contrast);
}
.skip-link:focus { top: 12px; }

.icon { width: 20px; height: 20px; flex: none; }

/* Buttons */
.btn {
    display: inline-flex; align-items: center; justify-content: center; gap: 8px;
    padding: 12px 22px; border: 1px solid transparent; border-radius: 10px;
    font: inherit; font-weight: 600; line-height: 1.2; text-decoration: none; cursor: pointer;
    transition: background-color .15s, border-color .15s, color .15s, transform .15s;
}
.btn .icon { width: 18px; height: 18px; }
.btn-primary { background: var(--accent); color: var(--accent-contrast); }
.btn-primary:hover { background: var(--accent-hover); color: var(--accent-contrast); }
.btn-ghost { background: var(--surface); border-color: var(--border); color: var(--text); }
.btn-ghost:hover { border-color: var(--accent); color: var(--text); }
.btn-light { background: #fff; color: #1a2f8f; }
.btn-light:hover { background: #eef2ff; color: #1a2f8f; }
.btn-sm { padding: 9px 16px; font-size: .9rem; }

/* Header */
.site-header {
    position: sticky; top: 0; z-index: 50;
    background: color-mix(in srgb, var(--bg) 88%, transparent);
    backdrop-filter: saturate(180%) blur(12px);
    -webkit-backdrop-filter: saturate(180%) blur(12px);
    border-bottom: 1px solid var(--border);
}
.header-inner { display: flex; align-items: center; gap: 24px; min-height: var(--header-height); }

.brand {
    display: inline-flex; align-items: center; gap: 10px;
    color: var(--text); font-weight: 750; font-size: 1.15rem; letter-spacing: -.02em; text-decoration: none;
}
.brand:hover { color: var(--text); }
.logo { width: 32px; height: 32px; }

.site-nav { display: flex; align-items: center; gap: 20px; margin-inline-start: auto; }
.nav-list { display: flex; gap: 2px; margin: 0; padding: 0; list-style: none; }
.nav-list a {
    display: block; padding: 8px 12px; border-radius: 8px;
    color: var(--muted); font-weight: 550; text-decoration: none;
}
.nav-list a:hover { color: var(--text); background: var(--bg-soft); }
.nav-list a[aria-current="page"] { color: var(--text); background: var(--bg-soft); }

.lang-switch { display: inline-flex; gap: 2px; padding: 3px; border: 1px solid var(--border); border-radius: 999px; }
.lang-switch a {
    padding: 4px 10px; border-radius: 999px;
    color: var(--muted); font-size: .78rem; font-weight: 650; letter-spacing: .04em; text-decoration: none;
}
.lang-switch a:hover { color: var(--text); }
.lang-switch a[aria-current="true"] { background: var(--accent); color: var(--accent-contrast); }

.nav-toggle {
    display: none; align-items: center; gap: 8px; margin-inline-start: auto;
    padding: 8px 12px; border: 1px solid var(--border); border-radius: 10px;
    background: var(--surface); color: var(--text); font: inherit; font-weight: 600; cursor: pointer;
}

@media (max-width: 900px) {
    .header-inner { flex-wrap: wrap; gap: 12px; padding-block: 12px; min-height: 0; }
    .site-nav { flex-basis: 100%; flex-direction: column; align-items: stretch; gap: 16px; padding: 8px 0 12px; }
    .nav-list { flex-direction: column; }
    .nav-list a { padding: 10px 12px; }
    .lang-switch { align-self: flex-start; }
    .js .nav-toggle { display: inline-flex; }
    .js .site-nav { display: none; }
    .js .site-nav.is-open { display: flex; }
}

/* Hero */
.hero {
    padding: clamp(56px, 9vw, 112px) 0;
    background:
        radial-gradient(900px 420px at 90% -10%, var(--accent-soft), transparent 70%),
        radial-gradient(700px 360px at -10% 110%, var(--accent-soft), transparent 70%);
}
.hero-grid { display: grid; grid-template-columns: minmax(0, 1.1fr) minmax(0, .9fr); gap: 56px; align-items: center; }
.eyebrow {
    display: inline-block; margin-bottom: 20px; padding: 6px 12px; border-radius: 8px;
    background: var(--accent-soft); color: var(--accent);
    font: 600 .8rem/1.2 var(--mono); letter-spacing: .08em; text-transform: uppercase;
}
.lead { max-width: 40em; margin-bottom: 32px; color: var(--muted); font-size: clamp(1.05rem, 1.6vw, 1.2rem); }
.actions { display: flex; flex-wrap: wrap; gap: 12px; }

.terminal {
    /* Shell output reads left to right in every language */
    direction: ltr; text-align: left;
    min-width: 0; overflow: hidden;
    background: #0d1326; color: #d6deeb; border: 1px solid #1f2a4a; border-radius: var(--radius);
    box-shadow: 0 30px 70px -30px rgba(15, 23, 42, .55);
    font: .86rem/1.75 var(--mono);
}
.terminal-bar { display: flex; gap: 7px; padding: 13px 16px; border-bottom: 1px solid #1c2645; background: #10182f; }
.terminal-bar span { width: 11px; height: 11px; border-radius: 50%; background: #ff5f57; }
.terminal-bar span:nth-child(2) { background: #febc2e; }
.terminal-bar span:nth-child(3) { background: #28c840; }
.terminal pre { margin: 0; padding: 20px 22px; overflow-x: auto; font: inherit; }
.t-prompt { color: #8aa4ff; }
.t-ok { color: #4ade80; }
.t-muted { color: #6b7794; }
.t-ann { color: #ffcb6b; }
.t-kw { color: #c792ea; }
.t-type { color: #82aaff; }
.t-fn { color: #89ddff; }

@media (max-width: 900px) {
    .hero-grid { grid-template-columns: minmax(0, 1fr); gap: 40px; }
}

/* Sections */
.section { padding: clamp(56px, 8vw, 96px) 0; }
.section-alt { background: var(--bg-soft); border-block: 1px solid var(--border); }
.section-tight { padding: clamp(40px, 6vw, 72px) 0; }
/* Two plain sections in a row (or a page header and a section) would otherwise get a double gap */
.page-head + .section:not(.section-alt),
.section:not(.section-alt) + .section-tight { padding-top: 0; }
.section-head { max-width: 720px; margin-bottom: 36px; }
.section-head p { color: var(--muted); margin: 0; }

.page-head {
    padding: clamp(48px, 7vw, 88px) 0 clamp(32px, 5vw, 56px);
    background: radial-gradient(900px 360px at 85% -20%, var(--accent-soft), transparent 70%);
}
.page-head h1 { font-size: clamp(2rem, 4vw, 2.9rem); }
.page-head .lead { margin-bottom: 0; }

.grid { display: grid; gap: 20px; }
.grid-3 { grid-template-columns: repeat(3, minmax(0, 1fr)); }
.grid-4 { grid-template-columns: repeat(4, minmax(0, 1fr)); }
@media (max-width: 1000px) {
    .grid-3, .grid-4 { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}
@media (max-width: 640px) {
    .grid-3, .grid-4 { grid-template-columns: minmax(0, 1fr); }
}

.card {
    display: block; padding: 28px;
    background: var(--surface); border: 1px solid var(--border); border-radius: var(--radius);
    color: inherit; text-decoration: none;
}
.card p { color: var(--muted); }
.card > p:last-child { margin-bottom: 0; }
.card-link { display: flex; flex-direction: column; transition: border-color .2s, box-shadow .2s, transform .2s; }
.card-link:hover { color: inherit; border-color: color-mix(in srgb, var(--accent) 55%, var(--border)); box-shadow: var(--shadow); transform: translateY(-3px); }
.card-link .more { display: inline-flex; align-items: center; gap: 6px; margin-top: auto; color: var(--accent); font-weight: 600; }
.card-link .more .icon { width: 16px; height: 16px; transition: transform .2s; }
.card-link:hover .more .icon { transform: translateX(3px); }
[dir="rtl"] .icon-arrow { transform: scaleX(-1); }
[dir="rtl"] .card-link:hover .more .icon-arrow { transform: translateX(-3px) scaleX(-1); }
/* Tight negative tracking suits Latin headings but squeezes Hebrew letters together */
[dir="rtl"] :is(h1, h2, h3) { letter-spacing: normal; }

.icon-badge {
    display: inline-grid; place-items: center; width: 46px; height: 46px; margin-bottom: 18px;
    border-radius: 12px; background: var(--accent-soft); color: var(--accent);
}
.icon-badge .icon { width: 22px; height: 22px; }
.icon-badge-sm { width: 38px; height: 38px; margin: 0; border-radius: 10px; }
.icon-badge-sm .icon { width: 18px; height: 18px; }

/* About */
.about-grid { display: grid; grid-template-columns: minmax(0, 1.4fr) minmax(0, 1fr); gap: 56px; align-items: center; }
.about-text p { color: var(--muted); font-size: 1.08rem; }
.founder { margin: 0; display: grid; gap: 18px; }
.founder img { width: 112px; height: 112px; border-radius: 50%; object-fit: cover; border: 3px solid var(--accent-soft); }
.founder p { margin: 0; }
.founder-name { color: var(--text) !important; font-size: 1.2rem; font-weight: 700; letter-spacing: -.01em; }
.founder-role { color: var(--accent) !important; font-weight: 600; font-size: .95rem; margin-bottom: 10px !important; }
@media (max-width: 900px) {
    .about-grid { grid-template-columns: minmax(0, 1fr); gap: 32px; }
}

/* Process */
.steps { counter-reset: step; display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: 28px; margin: 0; padding: 0; list-style: none; }
.step { position: relative; padding-top: 60px; }
.step p { color: var(--muted); margin: 0; }
.step::before {
    counter-increment: step; content: counter(step, decimal-leading-zero);
    position: absolute; top: 0; inset-inline-start: 0; display: grid; place-items: center; width: 42px; height: 42px;
    border: 1px solid var(--accent); border-radius: 50%; background: var(--surface); color: var(--accent);
    font: 700 .85rem var(--mono);
}
.step::after { content: ""; position: absolute; top: 21px; inset-inline: 56px -14px; height: 1px; background: var(--border); }
.step:last-child::after { display: none; }
@media (max-width: 900px) {
    .steps { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .step::after { display: none; }
}
@media (max-width: 560px) {
    .steps { grid-template-columns: minmax(0, 1fr); }
}

/* Chips */
.chips { display: flex; flex-wrap: wrap; gap: 10px; margin: 0; padding: 0; list-style: none; }
.chip { padding: 8px 14px; border: 1px solid var(--border); border-radius: 999px; background: var(--surface); font: 500 .9rem var(--mono); }
.chips-sm { gap: 6px; }
.chips-sm .chip { padding: 3px 10px; font-size: .78rem; background: var(--bg-soft); }

/* Call to action */
.cta {
    display: flex; flex-wrap: wrap; align-items: center; justify-content: space-between; gap: 24px 40px;
    padding: clamp(32px, 5vw, 56px); border-radius: 24px; color: #fff;
    background: linear-gradient(135deg, #2448d8 0%, #4a37d4 55%, #6a2fd0 100%);
}
.cta h2 { margin-bottom: 8px; }
.cta p { margin: 0; color: rgba(255, 255, 255, .85); max-width: 36em; }

/* Services */
.service-head { display: flex; gap: 20px; align-items: flex-start; }
.service-head .icon-badge { margin: 4px 0 0; }

/* Projects */
.project { display: flex; flex-direction: column; gap: 14px; }
.project p { margin: 0; }
.project-client { color: var(--accent) !important; font: 600 .75rem/1.4 var(--mono); letter-spacing: .08em; text-transform: uppercase; }
.project-title { font-size: 1.25rem; margin: 0; }
.project-label { color: var(--text) !important; font-weight: 600; font-size: .9rem; margin-bottom: 8px !important; }
.project .chips { margin-top: auto; padding-top: 6px; }
.checklist { display: grid; gap: 8px; margin: 0; padding: 0; list-style: none; color: var(--muted); }
.checklist li { display: flex; gap: 10px; align-items: flex-start; }
.checklist .icon { width: 18px; height: 18px; margin-top: 3px; color: var(--success); }

/* Contact */
.contact-grid { display: grid; grid-template-columns: minmax(0, 1.6fr) minmax(0, 1fr); gap: 24px; align-items: start; }
.card-form { padding: clamp(24px, 4vw, 36px); }
.form { display: grid; gap: 20px; }
.form-row { display: grid; grid-template-columns: repeat(2, minmax(0, 1fr)); gap: 20px; }
.field label { display: block; margin-bottom: 6px; font-size: .92rem; font-weight: 600; }
.field .optional { color: var(--muted); font-weight: 400; }
.field input, .field textarea {
    width: 100%; padding: 12px 14px;
    border: 1px solid var(--border); border-radius: 10px; background: var(--bg); color: var(--text);
    font: inherit; transition: border-color .15s, box-shadow .15s;
}
.field textarea { min-height: 170px; resize: vertical; }
.field input:focus, .field textarea:focus { outline: none; border-color: var(--accent); box-shadow: 0 0 0 4px var(--accent-soft); }
.field .is-invalid { border-color: var(--danger); }
.field-error { margin: 6px 0 0; color: var(--danger); font-size: .875rem; }
.form-footer { display: flex; flex-wrap: wrap; align-items: center; gap: 12px 20px; }
.form-footer p { margin: 0; }
.hp { position: absolute; inset-inline-start: -10000px; width: 1px; height: 1px; overflow: hidden; }

.alert { padding: 16px 18px; border: 1px solid; border-radius: 12px; }
.alert p { margin: 0 0 .4em; color: inherit; }
.alert p:last-child { margin-bottom: 0; }
.alert-title { font-weight: 700; font-size: 1.1rem; }
.alert-success { background: var(--success-soft); border-color: color-mix(in srgb, var(--success) 35%, transparent); color: var(--text); }
.alert-error { background: var(--danger-soft); border-color: color-mix(in srgb, var(--danger) 35%, transparent); color: var(--danger); }

.details-heading { font-size: 1.15rem; margin-bottom: 20px; }
.details-list { display: grid; gap: 20px; margin: 0; padding: 0; list-style: none; }
.details-list li { display: flex; gap: 14px; align-items: flex-start; }
.details-list p { margin: 0; }
.details-label { color: var(--muted); font-size: .85rem; }
.details-value { color: var(--text) !important; font-weight: 600; overflow-wrap: anywhere; }
a.details-value:hover, .details-value a:hover { color: var(--accent) !important; }
.details-value a { color: inherit; margin-inline-end: 12px; }

@media (max-width: 900px) {
    .contact-grid { grid-template-columns: minmax(0, 1fr); }
}
@media (max-width: 560px) {
    .form-row { grid-template-columns: minmax(0, 1fr); }
}

/* Error pages */
.error-page { text-align: center; padding-block: clamp(72px, 12vw, 140px); }
.error-page .lead { margin-inline: auto; }
.error-code { color: var(--accent); font: 700 clamp(3.5rem, 10vw, 6rem)/1 var(--mono); letter-spacing: -.04em; margin-bottom: 16px; }

/* Footer */
.site-footer { padding: 56px 0 32px; border-top: 1px solid var(--border); background: var(--bg-soft); color: var(--muted); font-size: .95rem; }
.footer-grid { display: grid; grid-template-columns: minmax(0, 2fr) minmax(0, 1fr) minmax(0, 1fr); gap: 32px; }
.footer-brand p { margin: 14px 0 0; max-width: 28em; }
.footer-title { margin-bottom: 12px; color: var(--text); font-weight: 650; }
.footer-links { display: grid; gap: 8px; margin: 0; padding: 0; list-style: none; }
.footer-links a { color: var(--muted); text-decoration: none; overflow-wrap: anywhere; }
.footer-links a:hover { color: var(--text); }
.footer-bottom {
    display: flex; flex-wrap: wrap; justify-content: space-between; gap: 8px 24px;
    margin-top: 40px; padding-top: 24px; border-top: 1px solid var(--border); font-size: .875rem;
}
@media (max-width: 720px) {
    .footer-grid { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .footer-brand { grid-column: 1 / -1; }
}

@media (max-width: 480px) {
    .container { padding: 0 16px; }
    .card { padding: 22px; }
}

@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { transition: none !important; }
}