/* ==========================================================================
   Advertime Mediavasarlo Kft. — shared stylesheet
   Technology consulting website. Plain CSS, no build step.
   ========================================================================== */

:root {
    --ink:        #0C1A2B;
    --graphite:   #16283C;
    --slate:      #3C5166;
    --muted:      #5A6E85;
    --line:       #DFE7EE;
    --line-soft:  #EDF2F6;
    --bg:         #FFFFFF;
    --bg-soft:    #F5F8FA;
    --accent:     #0F6FD1;
    --accent-dark:#0B559F;
    --accent-soft:#E7F1FC;
    --cyan:       #22B8DE;
    --radius:     10px;
    --radius-lg:  16px;
    --shadow:     0 1px 2px rgba(12, 26, 43, .04), 0 8px 24px -12px rgba(12, 26, 43, .18);
    --maxw:       1160px;
}

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

html { scroll-behavior: smooth; -webkit-text-size-adjust: 100%; }

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Arial, sans-serif;
    background: var(--bg);
    color: var(--graphite);
    line-height: 1.65;
    font-size: 16px;
    overflow-x: hidden;
}

img, svg { max-width: 100%; }

h1, h2, h3, h4 {
    font-family: 'Space Grotesk', 'Inter', -apple-system, Arial, sans-serif;
    color: var(--ink);
    font-weight: 600;
    line-height: 1.22;
    letter-spacing: -0.015em;
}

h1 { font-size: clamp(2rem, 4.4vw, 3.1rem); }
h2 { font-size: clamp(1.55rem, 2.9vw, 2.15rem); }
h3 { font-size: 1.12rem; }

p { color: var(--slate); }

a { color: var(--accent); }
a:hover { color: var(--accent-dark); }

.container {
    width: 100%;
    max-width: var(--maxw);
    margin: 0 auto;
    padding: 0 24px;
}

.skip-link {
    position: absolute;
    left: -9999px;
    top: 0;
    background: var(--ink);
    color: #fff;
    padding: .7rem 1.1rem;
    z-index: 300;
}
.skip-link:focus { left: 8px; top: 8px; }

:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

/* --------------------------------------------------------- navigation --- */

.site-header {
    position: sticky;
    top: 0;
    z-index: 120;
    background: rgba(255, 255, 255, .94);
    backdrop-filter: saturate(150%) blur(8px);
    border-bottom: 1px solid var(--line);
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 1rem;
    max-width: var(--maxw);
    margin: 0 auto;
    padding: .85rem 24px;
}

.brand {
    display: flex;
    align-items: center;
    gap: .65rem;
    text-decoration: none;
    color: var(--ink);
}

.brand-mark {
    width: 34px;
    height: 34px;
    border-radius: 8px;
    background: linear-gradient(150deg, var(--ink), var(--accent));
    color: #fff;
    font-family: 'Space Grotesk', Arial, sans-serif;
    font-weight: 700;
    font-size: 1.05rem;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.brand-text {
    display: flex;
    flex-direction: column;
    line-height: 1.1;
}
.brand-name {
    font-family: 'Space Grotesk', Arial, sans-serif;
    font-weight: 700;
    font-size: 1.02rem;
    letter-spacing: .04em;
}
.brand-sub {
    font-size: .66rem;
    letter-spacing: .16em;
    text-transform: uppercase;
    color: var(--muted);
}

.nav-links {
    display: flex;
    align-items: center;
    gap: 1.9rem;
}
.nav-links a {
    text-decoration: none;
    color: var(--slate);
    font-size: .93rem;
    font-weight: 500;
}
.nav-links a:hover { color: var(--accent); }
.nav-links a.nav-cta {
    color: #fff;
    background: var(--ink);
    padding: .5rem 1.05rem;
    border-radius: 8px;
}
.nav-links a.nav-cta:hover { background: var(--accent); color: #fff; }

.menu-toggle {
    display: none;
    background: none;
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: .4rem .55rem;
    cursor: pointer;
    color: var(--ink);
    line-height: 0;
}

/* -------------------------------------------------------------- buttons --- */

.btn {
    display: inline-flex;
    align-items: center;
    gap: .5rem;
    font: inherit;
    font-weight: 600;
    font-size: .95rem;
    padding: .8rem 1.5rem;
    border-radius: 8px;
    border: 1px solid transparent;
    text-decoration: none;
    cursor: pointer;
    transition: background .18s ease, border-color .18s ease, color .18s ease;
}
.btn-primary { background: var(--accent); color: #fff; }
.btn-primary:hover { background: var(--accent-dark); color: #fff; }
.btn-ghost {
    background: transparent;
    color: #fff;
    border-color: rgba(255, 255, 255, .35);
}
.btn-ghost:hover { border-color: #fff; color: #fff; background: rgba(255, 255, 255, .08); }
.btn-outline { background: #fff; color: var(--ink); border-color: var(--line); }
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }
.btn-block { width: 100%; justify-content: center; }

/* ----------------------------------------------------------------- hero --- */

.hero {
    background:
        radial-gradient(1000px 420px at 82% -10%, rgba(34, 184, 222, .22), transparent 62%),
        radial-gradient(760px 420px at 8% 110%, rgba(15, 111, 209, .28), transparent 60%),
        linear-gradient(180deg, #0C1A2B 0%, #102539 100%);
    color: #E6EEF6;
    padding: 5rem 0 4.5rem;
    position: relative;
    overflow: hidden;
}
.hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background-image:
        linear-gradient(rgba(255, 255, 255, .045) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255, 255, 255, .045) 1px, transparent 1px);
    background-size: 64px 64px;
    mask-image: radial-gradient(70% 60% at 50% 30%, #000, transparent 75%);
    -webkit-mask-image: radial-gradient(70% 60% at 50% 30%, #000, transparent 75%);
    pointer-events: none;
}
.hero > * { position: relative; z-index: 1; }

.hero-grid {
    display: grid;
    grid-template-columns: 1.15fr .85fr;
    gap: 3.5rem;
    align-items: center;
}

.eyebrow {
    display: inline-flex;
    align-items: center;
    gap: .55rem;
    font-size: .72rem;
    letter-spacing: .18em;
    text-transform: uppercase;
    font-weight: 600;
    color: var(--cyan);
    margin-bottom: 1.1rem;
}
.eyebrow::before {
    content: "";
    width: 26px;
    height: 1px;
    background: var(--cyan);
}

.hero h1 { color: #fff; margin-bottom: 1.1rem; }
.hero-lead {
    color: #B9CBDB;
    font-size: 1.08rem;
    max-width: 46ch;
    margin-bottom: 1.8rem;
}
.hero-actions { display: flex; flex-wrap: wrap; gap: .8rem; }

.hero-panel {
    background: rgba(255, 255, 255, .05);
    border: 1px solid rgba(255, 255, 255, .14);
    border-radius: var(--radius-lg);
    padding: 1.6rem;
}
.hero-panel h2 {
    color: #fff;
    font-size: .78rem;
    letter-spacing: .16em;
    text-transform: uppercase;
    font-weight: 600;
    margin-bottom: 1.1rem;
}
.panel-list { list-style: none; display: grid; gap: .1rem; }
.panel-list li {
    display: flex;
    align-items: center;
    gap: .75rem;
    padding: .7rem 0;
    border-bottom: 1px solid rgba(255, 255, 255, .09);
    color: #D3E0EC;
    font-size: .92rem;
}
.panel-list li:last-child { border-bottom: none; }
.panel-list svg { flex-shrink: 0; color: var(--cyan); }

/* -------------------------------------------------------------- sections --- */

.section { padding: 4.5rem 0; }
.section-soft { background: var(--bg-soft); border-block: 1px solid var(--line-soft); }

.section-head { max-width: 62ch; margin-bottom: 2.6rem; }
.section-head .eyebrow { color: var(--accent); }
.section-head .eyebrow::before { background: var(--accent); }
.section-head p { margin-top: .85rem; font-size: 1.02rem; }

.grid-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(290px, 1fr));
    gap: 1.35rem;
}

.card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 1.6rem;
    position: relative;
    transition: border-color .18s ease, box-shadow .18s ease, transform .18s ease;
}
.card::before {
    content: "";
    position: absolute;
    top: -1px; left: 1.5rem; right: 1.5rem;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--cyan));
    opacity: 0;
    transition: opacity .18s ease;
}
.card:hover { border-color: #C9D9E6; box-shadow: var(--shadow); transform: translateY(-2px); }
.card:hover::before { opacity: 1; }

.card-icon {
    width: 42px;
    height: 42px;
    border-radius: 9px;
    background: var(--accent-soft);
    color: var(--accent);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.1rem;
}
.card h3 { margin-bottom: .5rem; }
.card p { font-size: .94rem; }

.tag-list {
    list-style: none;
    margin-top: 1rem;
    display: flex;
    flex-wrap: wrap;
    gap: .4rem;
}
.tag-list li {
    font-size: .78rem;
    color: var(--slate);
    background: var(--bg-soft);
    border: 1px solid var(--line);
    border-radius: 999px;
    padding: .18rem .7rem;
}

/* ------------------------------------------------------------- approach --- */

.steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 1.35rem;
    counter-reset: step;
}
.step {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 1.5rem;
    position: relative;
}
.step-num {
    font-family: 'Space Grotesk', Arial, sans-serif;
    font-size: .78rem;
    font-weight: 700;
    letter-spacing: .12em;
    color: var(--accent);
    display: block;
    margin-bottom: .6rem;
}
.step h3 { margin-bottom: .45rem; }
.step p { font-size: .93rem; }

/* -------------------------------------------------------------- company --- */

.split {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
    align-items: start;
}
.split p + p { margin-top: 1rem; }

.data-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 1.8rem;
    box-shadow: var(--shadow);
}
.data-card h3 {
    font-size: .78rem;
    letter-spacing: .16em;
    text-transform: uppercase;
    color: var(--muted);
    margin-bottom: 1.2rem;
}
.data-list { display: grid; gap: 0; margin: 0; }
.data-list > div {
    display: grid;
    grid-template-columns: 190px 1fr;
    gap: 1rem;
    padding: .8rem 0;
    border-bottom: 1px solid var(--line-soft);
}
.data-list > div:last-child { border-bottom: none; }
.data-list dt { color: var(--muted); font-size: .88rem; }
.data-list dd { color: var(--ink); font-size: .94rem; font-weight: 500; }

/* -------------------------------------------------------------- contact --- */

.contact-grid {
    display: grid;
    grid-template-columns: .9fr 1.1fr;
    gap: 2.2rem;
    align-items: start;
}

.contact-panel {
    background: var(--ink);
    color: #C9D8E6;
    border-radius: var(--radius-lg);
    padding: 2rem;
}
.contact-panel h2 { color: #fff; margin-bottom: .8rem; }
.contact-panel p { color: #A9BED0; font-size: .95rem; }
.contact-item {
    display: flex;
    gap: .85rem;
    align-items: flex-start;
    margin-top: 1.4rem;
    font-size: .93rem;
}
.contact-item svg { color: var(--cyan); flex-shrink: 0; margin-top: 3px; }
.contact-item a { color: #fff; text-decoration: underline; text-underline-offset: 3px; word-break: break-word; }
.contact-item .contact-text { color: #A9BED0; }
.contact-item address { font-style: normal; }
.contact-item strong { color: #fff; font-weight: 600; display: block; }

.form-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow);
}
.form-group { margin-bottom: 1.05rem; }
.form-group label,
.field-label {
    display: block;
    font-size: .86rem;
    font-weight: 600;
    color: var(--ink);
    margin-bottom: .38rem;
}
input[type="text"],
input[type="email"],
textarea,
select {
    width: 100%;
    font: inherit;
    font-size: .95rem;
    color: var(--ink);
    padding: .72rem .9rem;
    border: 1px solid var(--line);
    border-radius: 8px;
    background: #FCFDFE;
}
textarea { resize: vertical; min-height: 120px; }
input:focus, textarea:focus, select:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px rgba(15, 111, 209, .13);
}

.checkbox-group {
    display: flex;
    align-items: flex-start;
    gap: .6rem;
    margin: 1.1rem 0;
}
.checkbox-group input[type="checkbox"] {
    width: 17px;
    height: 17px;
    margin: 3px 0 0;
    flex-shrink: 0;
    accent-color: var(--accent);
}
.checkbox-group label {
    font-size: .88rem;
    color: var(--slate);
    font-weight: 400;
    margin: 0;
}

.form-note {
    font-size: .8rem;
    color: var(--muted);
    margin-top: 1rem;
}

.notice {
    border-radius: 8px;
    padding: .85rem 1rem;
    margin-top: 1rem;
    font-size: .88rem;
    border: 1px solid;
}
.notice-info   { background: var(--accent-soft); border-color: #BEDBF7; color: #0B4C8C; }
.notice-warn   { background: #FFF6E5; border-color: #F6DFAE; color: #8A5A08; }
.notice-ok     { background: #E8F7EF; border-color: #B9E4CD; color: #14663F; }
.notice-neutral{ background: var(--bg-soft); border-color: var(--line); color: var(--slate); }
.notice a { color: inherit; }

/* --------------------------------------------------------------- footer --- */

.site-footer {
    background: var(--ink);
    color: #9FB3C6;
    padding: 3.2rem 0 1.8rem;
    font-size: .9rem;
}
.footer-grid {
    display: grid;
    grid-template-columns: 1.5fr 1fr 1fr 1.3fr;
    gap: 2.2rem;
}
.site-footer h4 {
    color: #fff;
    font-size: .76rem;
    letter-spacing: .16em;
    text-transform: uppercase;
    margin-bottom: 1rem;
}
.site-footer p { color: #9FB3C6; font-size: .88rem; }
.site-footer a { color: #C3D3E1; text-decoration: none; }
.site-footer a:hover { color: #fff; }
.footer-links a { display: block; margin-bottom: .55rem; }
.footer-address {
    font-style: normal;
    margin-top: .6rem;
    color: #9FB3C6;
    font-size: .88rem;
}
.footer-brand {
    display: flex;
    align-items: center;
    gap: .65rem;
    margin-bottom: 1rem;
    color: #fff;
}
.footer-brand .brand-name { color: #fff; }
.footer-legal {
    margin-top: 2.6rem;
    padding-top: 1.4rem;
    border-top: 1px solid rgba(255, 255, 255, .1);
    font-size: .8rem;
    color: #8AA0B4;
    display: grid;
    gap: .4rem;
}
.footer-legal address { font-style: normal; }

/* ----------------------------------------------------------- legal pages --- */

.page-head {
    background: linear-gradient(180deg, #0C1A2B 0%, #16283C 100%);
    color: #fff;
    padding: 3.4rem 0 3rem;
}
.page-head h1 { color: #fff; margin-bottom: .7rem; }
.page-head p { color: #A9BED0; font-size: .95rem; }

.legal { padding: 3rem 0 4rem; }
.legal-wrap { max-width: 820px; }
.legal h2 {
    font-size: 1.32rem;
    margin: 2.4rem 0 .8rem;
    padding-top: 1.4rem;
    border-top: 1px solid var(--line-soft);
}
.legal h2:first-of-type { border-top: none; padding-top: 0; margin-top: 1.6rem; }
.legal h3 { font-size: 1.02rem; margin: 1.4rem 0 .5rem; color: var(--graphite); }
.legal p, .legal li { font-size: .96rem; }
.legal p { margin-bottom: .9rem; }
.legal ul { margin: 0 0 1.1rem 1.3rem; }
.legal li { margin-bottom: .5rem; }
.legal .meta {
    font-size: .85rem;
    color: var(--muted);
    background: var(--bg-soft);
    border: 1px solid var(--line);
    border-radius: 8px;
    padding: .8rem 1rem;
    margin-bottom: 1.6rem;
}
.legal table {
    width: 100%;
    border-collapse: collapse;
    margin: 0 0 1.3rem;
    font-size: .92rem;
}
.legal th, .legal td {
    text-align: left;
    padding: .7rem .8rem;
    border: 1px solid var(--line);
    vertical-align: top;
}
.legal th { background: var(--bg-soft); color: var(--ink); font-weight: 600; }
.table-scroll { overflow-x: auto; }

/* ------------------------------------------------------- narrow pages --- */

.narrow { max-width: 660px; margin: 0 auto; }
.panel-card {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius-lg);
    padding: 2rem;
    box-shadow: var(--shadow);
}
.feature-row {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.3rem;
    margin-top: 2.5rem;
}
.feature {
    background: #fff;
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 1.3rem;
}
.feature .card-icon { width: 36px; height: 36px; margin-bottom: .8rem; }
.feature h3 { font-size: 1rem; margin-bottom: .35rem; }
.feature p { font-size: .89rem; }

.error-page {
    padding: 5rem 0;
    text-align: center;
}
.error-code {
    font-family: 'Space Grotesk', Arial, sans-serif;
    font-size: 4rem;
    font-weight: 700;
    color: var(--accent);
    line-height: 1;
}

/* ------------------------------------------------------------ responsive --- */

@media (max-width: 960px) {
    .hero-grid,
    .split,
    .contact-grid { grid-template-columns: 1fr; }
    .hero-grid { gap: 2.4rem; }
    .footer-grid { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
    .menu-toggle { display: inline-flex; }
    .nav-links {
        position: fixed;
        inset: 62px 0 auto 0;
        flex-direction: column;
        align-items: stretch;
        gap: 0;
        background: #fff;
        border-bottom: 1px solid var(--line);
        padding: .5rem 24px 1.2rem;
        display: none;
        box-shadow: 0 16px 30px -18px rgba(12, 26, 43, .4);
    }
    .nav-links.active { display: flex; }
    .nav-links a {
        padding: .8rem 0;
        border-bottom: 1px solid var(--line-soft);
        font-size: 1rem;
    }
    .nav-links a.nav-cta {
        border-bottom: none;
        text-align: center;
        margin-top: .8rem;
        padding: .75rem 1rem;
    }
    .hero { padding: 3.4rem 0 3rem; }
    .section { padding: 3.2rem 0; }
    .data-list > div { grid-template-columns: 1fr; gap: .15rem; }
    .form-card, .contact-panel, .panel-card, .data-card { padding: 1.4rem; }
}

@media (max-width: 560px) {
    .footer-grid { grid-template-columns: 1fr; gap: 1.8rem; }
    .brand-sub { display: none; }
    .hero-actions .btn { width: 100%; justify-content: center; }
}

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    * { transition: none !important; }
}