:root {
    --blue: #0E6FD0;
    --blue-bright: #2AA3F0;
    --cyan: #5FD4FF;
    --violet: #7C5CFF;
    --teal: #12A594;
    --orange: #E8833A;
    --green: #16A34A;

    --ink: #0F172A;
    --muted: #64748B;
    --line: #E2ECF8;
    --surface: #FFFFFF;
    --page: #F4F7FC;
    --navy: #071A33;

    --radius: 16px;
    --gap: 14px;
    --shadow: 0 10px 30px rgba(11, 37, 73, .08);
    --shadow-lg: 0 24px 60px rgba(11, 37, 73, .18);
    --container: 1400px;
}

* { margin: 0; padding: 0; box-sizing: border-box; }
html { scroll-behavior: smooth; }

body {
    font-family: "Segoe UI", Inter, system-ui, Arial, sans-serif;
    background: var(--page);
    color: var(--ink);
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
}

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

.sprite { display: none; }

.ico {
    width: 1em;
    height: 1em;
    fill: currentColor;
    flex: none;
}

.container {
    width: min(94%, var(--container));
    margin: 0 auto;
}

/* Souvislý blok: sekce na sebe navazují jednotnou mezerou, žádné velké prázdné plochy */
.board { padding: var(--gap) 0 calc(var(--gap) * 2); }
.section + .section { margin-top: var(--gap); }

/* ============ HERO ============ */
.hero {
    position: relative;
    background: var(--navy) url("../images/hero-background.svg") center / cover no-repeat;
    color: #fff;
    padding: 64px 0 40px;
    overflow: hidden;
}

.hero::after {
    content: "";
    position: absolute;
    inset: 0;
    background: linear-gradient(100deg, rgba(3, 14, 32, .94) 0%, rgba(3, 14, 32, .78) 34%, rgba(3, 14, 32, .10) 62%, rgba(3, 14, 32, 0) 100%);
    pointer-events: none;
}

.hero-inner { position: relative; z-index: 2; }

.hero-brand {
    font-size: clamp(3.2rem, 7vw, 5.6rem);
    font-weight: 800;
    letter-spacing: -3px;
    line-height: 1;
    text-shadow: 0 6px 30px rgba(0, 0, 0, .45);
}

.hero-tags {
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 10px;
    margin-top: 10px;
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--blue-bright);
}
.hero-tags span { white-space: nowrap; }
.hero-tags i { color: rgba(255, 255, 255, .35); font-style: normal; }
.hero-tags .t-violet { color: #A98BFF; }
.hero-tags .t-cyan { color: var(--cyan); }

.hero h1 {
    margin-top: 28px;
    font-size: clamp(1.7rem, 2.6vw, 2.4rem);
    line-height: 1.22;
    font-weight: 700;
    max-width: 18ch;
}

.hero-lead {
    margin-top: 14px;
    max-width: 44ch;
    color: rgba(255, 255, 255, .78);
}

.cta-button {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    margin-top: 26px;
    background: var(--blue);
    color: #fff;
    padding: 14px 26px;
    border-radius: 10px;
    font-weight: 600;
    font-size: .98rem;
    box-shadow: 0 10px 26px rgba(14, 111, 208, .45);
    transition: transform .18s ease, background .18s ease;
}
.cta-button:hover { transform: translateY(-2px); background: var(--blue-bright); }
.cta-button .ico { font-size: 1.05rem; }

.hero-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 28px;
    margin-top: 34px;
    font-size: .95rem;
    font-weight: 600;
}
.hero-tech li { display: flex; align-items: center; gap: 10px; }

.chip-ico {
    width: 30px;
    height: 30px;
    border-radius: 8px;
    display: grid;
    place-items: center;
    font-size: 1.05rem;
}
.chip-ico.c-blue   { background: rgba(42, 163, 240, .18); color: var(--blue-bright); }
.chip-ico.c-violet { background: rgba(124, 92, 255, .20); color: #A98BFF; }
.chip-ico.c-cyan   { background: rgba(95, 212, 255, .18); color: var(--cyan); }
.chip-ico.c-teal   { background: rgba(18, 165, 148, .20); color: #3FD6C2; }

/* ============ KARTY SLUŽEB ============ */
.cards {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--gap);
}

.card {
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 24px;
    box-shadow: var(--shadow);
    transition: transform .2s ease, box-shadow .2s ease;
}
.card:hover { transform: translateY(-4px); box-shadow: var(--shadow-lg); }

.card-head {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 18px;
}

.card-ico {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: grid;
    place-items: center;
    font-size: 1.4rem;
    color: #fff;
}

.card h2 { font-size: 1.25rem; font-weight: 700; }

.card .ticks li {
    display: flex;
    align-items: flex-start;
    gap: 10px;
    padding: 5px 0;
    font-size: .92rem;
    color: #334155;
}
.card .tick { font-size: .78rem; margin-top: .35em; }

.a-blue   .card-ico { background: linear-gradient(140deg, #2AA3F0, #0E6FD0); }
.a-blue   h2, .a-blue   .tick { color: var(--blue); }
.a-violet .card-ico { background: linear-gradient(140deg, #9B7CFF, #6B46F0); }
.a-violet h2, .a-violet .tick { color: #6B46F0; }
.a-teal   .card-ico { background: linear-gradient(140deg, #22C1AC, #0E8578); }
.a-teal   h2, .a-teal   .tick { color: #0E8578; }
.a-orange .card-ico { background: linear-gradient(140deg, #F5A05A, #DE6F22); }
.a-orange h2, .a-orange .tick { color: #DE6F22; }

/* ============ ARCHITEKTURA ============ */
.architecture-grid {
    display: grid;
    grid-template-columns: 250px minmax(0, 1fr) 260px;
    gap: 28px;
    align-items: center;
    background: var(--surface);
    border: 1px solid var(--line);
    border-radius: var(--radius);
    padding: 28px;
    box-shadow: var(--shadow);
    width: min(94%, var(--container));
}

.arch-intro h2 { font-size: 1.5rem; line-height: 1.25; }
.arch-intro p { margin-top: 12px; color: var(--muted); font-size: .92rem; }

.ghost-button {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-top: 18px;
    padding: 10px 16px;
    border: 1px solid var(--blue);
    color: var(--blue);
    border-radius: 9px;
    font-size: .85rem;
    font-weight: 600;
    transition: background .18s ease, color .18s ease;
}
.ghost-button:hover { background: var(--blue); color: #fff; }

.architecture-benefits { display: flex; flex-direction: column; gap: 10px; }
.architecture-benefits li {
    display: flex;
    align-items: center;
    gap: 12px;
    background: #F6FAFF;
    border-left: 3px solid var(--green);
    border-radius: 9px;
    padding: 11px 14px;
    font-size: .9rem;
    font-weight: 500;
}
.architecture-benefits .box { font-size: 1.05rem; color: var(--green); }

/* ============ APLIKACE ============ */
.apps-panel {
    background: linear-gradient(135deg, #061B36 0%, #0A2B55 55%, #062043 100%);
    border-radius: var(--radius);
    color: #fff;
    padding: 34px;
    display: grid;
    grid-template-columns: minmax(0, 1fr) minmax(0, 1.05fr);
    gap: 36px;
    align-items: center;
    box-shadow: var(--shadow-lg);
}

.apps-copy h2 {
    font-size: clamp(1.5rem, 2.2vw, 2rem);
    line-height: 1.22;
    max-width: 16ch;
}

.feature-grid {
    margin-top: 28px;
    display: grid;
    grid-template-columns: repeat(2, minmax(0, 1fr));
    gap: 22px 26px;
}
.feature-grid .ico { font-size: 1.5rem; color: var(--cyan); }
.feature-grid h3 { margin-top: 10px; font-size: .98rem; font-weight: 700; }
.feature-grid p { margin-top: 4px; font-size: .84rem; color: rgba(255, 255, 255, .68); }

.apps-visual img { border-radius: 12px; }

/* ============ RESPONSIVE ============ */
@media (max-width: 1200px) {
    .cards { grid-template-columns: repeat(2, 1fr); }
    .architecture-grid { grid-template-columns: minmax(0, 1fr) 250px; }
    .arch-intro { grid-column: 1 / -1; }
}

@media (max-width: 900px) {
    .hero { padding: 48px 0 34px; }
    .hero::after { background: linear-gradient(180deg, rgba(3, 14, 32, .92), rgba(3, 14, 32, .72)); }
    .architecture-grid { grid-template-columns: minmax(0, 1fr); }
    .apps-panel { grid-template-columns: minmax(0, 1fr); }
}

@media (max-width: 640px) {
    .cards { grid-template-columns: 1fr; }
    .feature-grid { grid-template-columns: 1fr; }
    .apps-panel, .architecture-grid { padding: 22px; }
    .hero-tags { font-size: .86rem; gap: 7px; }
    .hero-tech { gap: 16px; }
}

/* ============ ANIMACE ============ */
.animate {
    opacity: 0;
    transform: translateY(18px);
    transition: opacity .55s ease, transform .55s ease;
}
.visible { opacity: 1; transform: translateY(0); }

@media (prefers-reduced-motion: reduce) {
    html { scroll-behavior: auto; }
    .animate, .visible { opacity: 1; transform: none; transition: none; }
}