/* --- Reset & Base --- */
* { box-sizing: border-box; margin: 0; padding: 0; outline: none; }

:root {
    --bg-main: #1b1d20;
    --bg-soft: #22252a;
    --bg-deep: #16181b;
    --bg-highlight: #202d3a;
    --text-main: #ffffff;
    --text-soft: #c9ced6;
    --text-muted: #8e99a5;
    --accent: #3e77aa;
    --accent-hover: #4a8bc4;
    --border-soft: rgba(255,255,255,0.08);
    --shadow-soft: 0 10px 30px rgba(0,0,0,0.3);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Open Sans', sans-serif;
    background:
        radial-gradient(circle at top left, rgba(62, 119, 170, 0.18), transparent 28%),
        linear-gradient(180deg, #17191c 0%, #1b1d20 20%, #1b1d20 100%);
    color: var(--text-main);
    line-height: 1.5;
    -webkit-font-smoothing: antialiased;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.3s, background-color 0.3s, border-color 0.3s, transform 0.3s;
}

ul { list-style: none; }

img {
    max-width: 100%;
    display: block;
}

button,
a {
    -webkit-tap-highlight-color: transparent;
}

:focus-visible {
    outline: 2px solid var(--accent-hover);
    outline-offset: 3px;
}

.skip-link {
    position: absolute;
    left: 16px;
    top: -48px;
    background: var(--accent);
    color: #fff;
    padding: 10px 14px;
    border-radius: 6px;
    z-index: 2000;
}

.skip-link:focus {
    top: 16px;
}

.container {
    max-width: 1240px;
    margin: 0 auto;
    padding: 0 20px;
}

.section-label,
.eyebrow {
    display: inline-block;
    margin-bottom: 14px;
    font-family: 'Montserrat', sans-serif;
    font-size: 12px;
    font-weight: 700;
    letter-spacing: 0.14em;
    text-transform: uppercase;
    color: var(--accent-hover);
}

.section-header {
    margin-bottom: 50px;
    max-width: 820px;
}

.section-header h2 {
    font-family: 'Montserrat', sans-serif;
    font-size: 32px;
    font-weight: 700;
    line-height: 1.25;
}

/* --- Header --- */
header {
    padding: 20px 0;
    position: sticky;
    top: 0;
    background: rgba(27, 29, 32, 0.95);
    backdrop-filter: blur(12px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-soft);
}

.header-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 20px;
}

.logo {
    font-family: 'Montserrat', sans-serif;
    font-size: 24px;
    font-weight: 700;
    letter-spacing: 1px;
    color: #fff;
    display: inline-flex;
    align-items: center;
    gap: 10px;
    flex-shrink: 0;
}

.logo-mark {
    color: var(--accent-hover);
    font-family: monospace;
    font-weight: 700;
    letter-spacing: 0;
    font-size: 0.95em;
}

.logo-blink {
    display: inline-block;
    animation: logo-cursor-blink 1.1s steps(1, end) infinite;
}

@keyframes logo-cursor-blink {
    0%, 48% {
        opacity: 1;
    }
    50%, 100% {
        opacity: 0.15;
    }
}

.nav-menu {
    display: flex;
    gap: 24px;
    font-family: 'Montserrat', sans-serif;
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
}

.nav-menu a { color: #aeb6c0; }
.nav-menu a:hover { color: #fff; }

.header-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.contacts {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    text-align: right;
    font-size: 14px;
    line-height: 1.4;
}

.contacts .phone {
    font-weight: 700;
    display: block;
}

.contacts .email {
    color: var(--accent-hover);
    font-size: 13px;
}

.btn-discuss,
.btn-secondary {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    border-radius: 4px;
    font-family: 'Montserrat', sans-serif;
    font-weight: 600;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    padding: 12px 24px;
}

.btn-discuss {
    background-color: var(--accent);
    color: #fff;
}

.btn-discuss:hover {
    background-color: var(--accent-hover);
}

.btn-secondary {
    border: 1px solid rgba(255,255,255,0.14);
    color: #fff;
    background: rgba(255,255,255,0.02);
}

.btn-secondary:hover {
    border-color: var(--accent);
    color: var(--accent-hover);
}

/* --- Burger Menu --- */
.burger-menu {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: 5px;
    gap: 5px;
    z-index: 1001;
}

.burger-menu span {
    width: 25px;
    height: 3px;
    background-color: #fff;
    border-radius: 2px;
    transition: all 0.3s ease;
}

.burger-menu.active span:nth-child(1) {
    transform: rotate(45deg) translate(10px, 10px);
}

.burger-menu.active span:nth-child(2) {
    opacity: 0;
}

.burger-menu.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -7px);
}

.mobile-menu {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    background: rgba(20, 22, 25, 0.98);
    border-bottom: 1px solid var(--border-soft);
    padding: 20px;
    z-index: 999;
    flex-direction: column;
    gap: 15px;
}

.mobile-menu a {
    color: #fff;
    font-family: 'Montserrat', sans-serif;
    font-size: 14px;
    font-weight: 600;
    text-transform: uppercase;
    padding: 12px 0;
    border-bottom: 1px solid rgba(255,255,255,0.1);
}

.mobile-menu a:last-child { border-bottom: none; }

.mobile-menu a:hover {
    color: var(--accent-hover);
    padding-left: 10px;
}

.mobile-menu.active {
    display: flex;
}

/* --- Hero --- */
.hero {
    padding: 110px 0 70px;
}

.hero h1 {
    font-family: 'Montserrat', sans-serif;
    font-size: 48px;
    font-weight: 700;
    line-height: 1.15;
    max-width: 980px;
    margin: 0 0 24px;
}

.hero h1 span { color: var(--accent-hover); }

.hero-text {
    max-width: 760px;
    font-size: 18px;
    color: var(--text-soft);
    line-height: 1.7;
}

.hero-actions {
    display: flex;
    gap: 16px;
    margin-top: 32px;
    flex-wrap: wrap;
}

/* --- Services Grid --- */
.services { padding: 40px 0 90px; }

.grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.card {
    background-color: rgba(34, 37, 42, 0.92);
    padding: 35px 30px;
    border-radius: 6px;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    min-height: 320px;
    position: relative;
    transition: transform 0.3s, box-shadow 0.3s, border-color 0.3s;
    border: 1px solid transparent;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-soft);
    border-color: rgba(62, 119, 170, 0.45);
}

.card-num {
    position: absolute;
    top: 30px;
    right: 30px;
    font-size: 14px;
    color: #49515b;
    font-weight: 700;
}

.card-title {
    font-family: 'Montserrat', sans-serif;
    font-size: 20px;
    font-weight: 700;
    margin-bottom: 20px;
    color: #fff;
    display: flex;
    align-items: center;
    gap: 10px;
}

.card-title span {
    color: var(--accent-hover);
    font-family: monospace;
    font-weight: 400;
}

.card-desc {
    font-size: 14px;
    color: var(--text-soft);
    line-height: 1.7;
    margin-bottom: 30px;
    flex-grow: 1;
}

.card-footer {
    border-top: 1px solid rgba(255,255,255,0.08);
    padding-top: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.more-link {
    font-size: 13px;
    color: var(--accent-hover);
    font-weight: 600;
    text-transform: uppercase;
    display: flex;
    align-items: center;
    gap: 5px;
}

.more-link::after {
    content: "→";
    font-size: 16px;
    transition: transform 0.2s;
}

.more-link:hover::after { transform: translateX(3px); }

/* --- Principles & Info Blocks --- */
.principles,
.info-section,
.contact-section {
    padding: 80px 0;
}

.principles {
    background-color: rgba(34, 37, 42, 0.72);
}

.principles-grid,
.info-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 30px;
}

.info-grid {
    grid-template-columns: repeat(3, 1fr);
}

.p-item,
.info-card,
.contact-card {
    background: rgba(34, 37, 42, 0.88);
    border: 1px solid var(--border-soft);
    border-radius: 6px;
}

.p-item,
.info-card {
    padding: 28px 24px;
}

.p-item h3,
.info-card h3 {
    font-size: 18px;
    margin-bottom: 15px;
    color: #fff;
    font-family: 'Montserrat', sans-serif;
}

.p-item p,
.info-card p {
    font-size: 14px;
    color: var(--text-soft);
    line-height: 1.7;
}

.info-section-alt {
    background: rgba(20, 22, 25, 0.55);
}

/* --- Contact Section --- */
.contact-layout {
    display: grid;
    grid-template-columns: minmax(0, 1.3fr) minmax(320px, 0.9fr);
    gap: 40px;
    align-items: start;
}

.contact-copy h2 {
    font-family: 'Montserrat', sans-serif;
    font-size: 36px;
    line-height: 1.2;
    margin-bottom: 22px;
}

.contact-copy p:last-child {
    font-size: 16px;
    color: var(--text-soft);
    line-height: 1.8;
}

.contact-card {
    padding: 28px;
    box-shadow: var(--shadow-soft);
}

.contact-card h3 {
    font-family: 'Montserrat', sans-serif;
    font-size: 20px;
    margin-bottom: 24px;
}

.contact-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-list li {
    display: flex;
    flex-direction: column;
    gap: 4px;
    color: var(--text-soft);
}

.contact-list span {
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--text-muted);
    font-family: 'Montserrat', sans-serif;
    font-weight: 600;
}

.contact-list a,
.contact-list strong {
    color: #fff;
    font-size: 16px;
    font-weight: 600;
}

.contact-actions {
    display: flex;
    flex-wrap: wrap;
    gap: 12px;
    margin-top: 28px;
}

/* --- Footer --- */
footer {
    background-color: var(--bg-deep);
    padding: 60px 0;
    font-size: 13px;
    color: #7f8892;
    border-top: 1px solid var(--border-soft);
}

.footer-row {
    display: flex;
    justify-content: space-between;
    gap: 30px;
}

.footer-logo {
    margin-bottom: 15px;
}

.footer-col h4 {
    color: #fff;
    margin-bottom: 20px;
    font-family: 'Montserrat', sans-serif;
}

.footer-col ul li { margin-bottom: 10px; }
.footer-col ul li a:hover { color: var(--accent-hover); }

/* --- Service Detail Page --- */
.service-detail {
    padding: 60px 0 80px;
}

.back-link {
    display: inline-block;
    margin-bottom: 40px;
    color: var(--accent-hover);
    font-weight: 600;
    font-size: 14px;
}

.back-link:hover {
    color: var(--accent-hover);
    transform: translateX(-3px);
}

.service-header {
    margin-bottom: 50px;
    border-bottom: 2px solid var(--accent);
    padding-bottom: 30px;
}

.service-header h1 {
    font-family: 'Montserrat', sans-serif;
    font-size: 42px;
    font-weight: 700;
    display: flex;
    align-items: center;
    gap: 15px;
}

.service-header h1 span {
    color: var(--accent-hover);
    font-family: monospace;
}

.service-content {
    display: grid;
    grid-template-columns: minmax(0, 2fr) minmax(280px, 1fr);
    gap: 40px;
}

.content-col-main {
    display: flex;
    flex-direction: column;
    gap: 40px;
}

.service-section h2 {
    font-family: 'Montserrat', sans-serif;
    font-size: 24px;
    font-weight: 700;
    margin-bottom: 20px;
    color: #fff;
}

.service-section p {
    font-size: 15px;
    color: var(--text-soft);
    line-height: 1.8;
    margin-bottom: 15px;
}

.service-list,
.benefits-list,
.sidebar-list {
    display: flex;
    flex-direction: column;
}

.service-list { gap: 12px; }
.benefits-list { gap: 15px; }
.sidebar-list { gap: 10px; margin-bottom: 25px; }

.service-list li,
.benefits-list li,
.sidebar-list li {
    font-size: 14px;
    color: var(--text-soft);
    line-height: 1.7;
}

.service-list li,
.benefits-list li {
    padding-left: 20px;
    position: relative;
}

.service-list li::before {
    content: "→";
    position: absolute;
    left: 0;
    color: var(--accent-hover);
    font-weight: 700;
}

.benefits-list li::before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--accent-hover);
    font-weight: 700;
}

.benefits-list strong {
    color: #fff;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
}

.tool-item {
    background-color: rgba(34, 37, 42, 0.92);
    padding: 15px 10px;
    text-align: center;
    border-radius: 4px;
    border: 1px solid var(--border-soft);
    font-size: 13px;
    color: var(--accent-hover);
    font-weight: 600;
    transition: 0.3s;
}

.tool-item:hover {
    background-color: #2a2e33;
    border-color: var(--accent);
}

.sla-items {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.sla-item {
    background-color: rgba(34, 37, 42, 0.92);
    padding: 25px 20px;
    border-radius: 4px;
    border: 1px solid var(--border-soft);
}

.sla-item h4 {
    font-size: 18px;
    font-weight: 700;
    margin-bottom: 15px;
    color: var(--accent-hover);
    font-family: 'Montserrat', sans-serif;
}

.sla-item p {
    font-size: 13px;
    color: var(--text-soft);
    line-height: 1.9;
    margin: 0;
}

.content-col-sidebar {
    display: flex;
    flex-direction: column;
    gap: 30px;
}

.sidebar-box {
    background-color: rgba(34, 37, 42, 0.92);
    padding: 25px;
    border-radius: 4px;
    border: 1px solid var(--border-soft);
}

.sidebar-box h3 {
    font-family: 'Montserrat', sans-serif;
    font-size: 16px;
    font-weight: 700;
    margin-bottom: 20px;
    color: #fff;
}

.sidebar-box p {
    font-size: 13px;
    color: var(--text-muted);
    line-height: 1.8;
    margin-bottom: 12px;
}

.sidebar-box a {
    color: var(--accent-hover);
}

.sidebar-box a:hover {
    color: #fff;
}

.btn-block {
    display: block;
    width: 100%;
    padding: 15px;
    text-align: center;
}

/* --- Responsive --- */
@media (max-width: 1024px) {
    .grid { grid-template-columns: repeat(2, 1fr); }
    .principles-grid { grid-template-columns: repeat(2, 1fr); }
    .info-grid { grid-template-columns: 1fr; }
    .contact-layout { grid-template-columns: 1fr; }
    .service-content { grid-template-columns: 1fr; }
    .tools-grid { grid-template-columns: repeat(3, 1fr); }
    .sla-items { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
    .container { padding: 0 16px; }

    header { padding: 16px 0; }

    .header-inner {
        flex-direction: row;
        gap: 16px;
        align-items: center;
        justify-content: space-between;
    }

    .logo { font-size: 20px; }
    .nav-menu { display: none; }
    .burger-menu { display: flex; }
    .header-right { display: none; }

    .hero {
        padding: 60px 0 40px;
    }

    .hero h1 {
        font-size: 30px;
        line-height: 1.2;
        margin-bottom: 18px;
    }

    .hero-text {
        font-size: 15px;
        line-height: 1.7;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;
    }

    .btn-discuss,
    .btn-secondary {
        width: 100%;
        text-align: center;
        padding: 14px 16px;
        font-size: 12px;
    }

    .services { padding: 30px 0 60px; }

    .grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    .card {
        min-height: 280px;
        padding: 24px 20px;
    }

    .card-num {
        font-size: 12px;
        top: 20px;
        right: 20px;
    }

    .card-title {
        font-size: 18px;
        margin-bottom: 16px;
    }

    .card-desc {
        font-size: 13px;
        line-height: 1.6;
        margin-bottom: 20px;
    }

    .card-footer {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
    }

    .principles,
    .info-section,
    .contact-section {
        padding: 60px 0;
    }

    .section-header {
        margin-bottom: 30px;
    }

    .section-header h2,
    .contact-copy h2 {
        font-size: 24px;
        line-height: 1.3;
    }

    .principles-grid {
        grid-template-columns: 1fr;
        gap: 20px;
    }

    footer { padding: 40px 0; }

    .footer-row {
        flex-direction: column;
        gap: 30px;
    }

    .service-detail { padding: 40px 0 60px; }

    .back-link {
        margin-bottom: 20px;
        font-size: 12px;
    }

    .service-header {
        margin-bottom: 30px;
        padding-bottom: 20px;
    }

    .service-header h1 {
        font-size: 24px;
        line-height: 1.3;
        flex-wrap: wrap;
    }

    .service-section h2 {
        font-size: 20px;
        margin-bottom: 16px;
    }

    .service-section p,
    .p-item p,
    .info-card p {
        font-size: 13px;
        line-height: 1.6;
    }

    .service-list li,
    .benefits-list li {
        font-size: 13px;
    }

    .tools-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 12px;
    }

    .tool-item {
        padding: 12px 8px;
        font-size: 11px;
    }

    .sla-items {
        grid-template-columns: 1fr;
        gap: 16px;
    }

    .sla-item {
        padding: 20px 16px;
    }

    .sidebar-box {
        padding: 20px 16px;
    }

    .contact-card {
        padding: 22px 18px;
    }
}

@media (max-width: 480px) {
    .container { padding: 0 12px; }

    .header-inner { gap: 12px; }
    .logo { font-size: 18px; }

    .hero { padding: 40px 0 30px; }

    .hero h1 {
        font-size: 24px;
        line-height: 1.2;
        margin-bottom: 15px;
    }

    .hero-text {
        font-size: 14px;
    }

    .services { padding: 25px 0 50px; }

    .card {
        min-height: 260px;
        padding: 18px 16px;
    }

    .card-title { font-size: 16px; }
    .card-desc { font-size: 12px; }

    .section-header h2,
    .contact-copy h2,
    .service-header h1 {
        font-size: 20px;
    }

    .p-item,
    .info-card,
    .contact-card,
    .sidebar-box {
        padding: 16px 12px;
    }

    .service-section h2 {
        font-size: 18px;
        margin-bottom: 14px;
    }

    .service-section p,
    .service-list li,
    .benefits-list li {
        font-size: 12px;
    }

    .tools-grid {
        grid-template-columns: 1fr;
        gap: 10px;
    }

    .tool-item {
        padding: 10px;
        font-size: 10px;
    }
}