/* CSS variables allow quick theming to match the PDF brandbook */
:root {
    --font-sans: 'Montserrat Alternates', system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Arial, sans-serif;
    /* Light brand palette */
    --color-bg: #FFFBF6;
    --color-surface: #FFFFFF;
    --color-text: #36383C;
    --color-text-muted: #566276;
    --color-primary: #FDD1AA;
    --color-primary-contrast: #36383C;
    --color-border: #E9CDC1;

    /* accents from palette */
    --brand-sky: #79B7CC;
    --brand-mint: #B4EDDF;
    --brand-yellow: #F0CE6B;
    --brand-rose: #F6DCD0;
    --brand-olive: #A5D4C8;

    --container-max: 1120px;
    --radius: 16px;
    --shadow: 0 8px 24px rgba(0,0,0,0.06);

    --space-1: 4px;
    --space-2: 8px;
    --space-3: 12px;
    --space-4: 16px;
    --space-5: 20px;
    --space-6: 24px;
    --space-7: 32px;
    --space-8: 40px;
    --space-9: 56px;
    --space-10: 88px;
}

* { box-sizing: border-box; }
html, body { height: 100%; }
body {
    margin: 0;
    font-family: var(--font-sans);
    color: var(--color-text);
    background: var(--color-bg);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

.container { width: 100%; max-width: var(--container-max); margin: 0 auto; padding: 0 var(--space-6); }

/* Header */
.site-header { position: sticky; top: 0; z-index: 100; background: rgba(255,255,255,0.75); backdrop-filter: blur(8px); border-bottom: 1px solid var(--color-border); }
.header-inner { display: flex; align-items: center; justify-content: space-between; min-height: 64px; }
.brand { display: inline-flex; align-items: center; gap: var(--space-3); font-weight: 700; }
.brand-logo { height: 56px; width: auto; object-fit: contain; }
.brand-name { letter-spacing: 0.4px; }

.nav-toggle { display: none; background: none; border: 1px solid var(--color-border); color: var(--color-text); padding: 6px 10px; border-radius: 8px; }
.nav-menu { display: flex; gap: var(--space-6); list-style: none; padding: 0; margin: 0; }
.nav-menu a { color: var(--color-text-muted); }
.nav-menu a:hover { color: var(--color-text); }

/* Hero */
.hero { padding: var(--space-10) 0 var(--space-9); background:
    linear-gradient(0deg, rgba(255,255,255,0.6), rgba(255,255,255,0.6)),
    url('images/TiSo_LOGOBOOK 2025_Страница_20_Изображение_0004.jpg') center/cover no-repeat,
    var(--color-bg);
}
.hero-inner { display: grid; align-items: center; min-height: 56vh; }
.hero h1 { font-size: clamp(32px, 6vw, 60px); line-height: 1.06; margin: 0 0 var(--space-4); letter-spacing: -0.5px; font-weight: 700; }
.subtitle { color: var(--color-text-muted); max-width: 64ch; margin-bottom: var(--space-7); }
.cta-group { display: flex; gap: var(--space-4); flex-wrap: wrap; }

.btn { display: inline-flex; align-items: center; justify-content: center; height: 44px; padding: 0 var(--space-6); border-radius: 12px; border: 1px solid var(--color-border); transition: transform .06s ease, background .2s ease, color .2s ease, border-color .2s ease; }
.btn.primary { background: var(--color-primary); color: var(--color-primary-contrast); border-color: transparent; box-shadow: 0 6px 0 rgba(0,0,0,0.08); }
.btn.primary:hover { transform: translateY(-1px); filter: brightness(1.05); }
.btn.primary:active { transform: translateY(2px); box-shadow: 0 3px 0 rgba(0,0,0,0.1); }
.btn.ghost { background: transparent; color: var(--color-text); }
.btn.ghost:hover { background: rgba(0,0,0,0.05); }

/* Playful pills */
.pill { display: inline-flex; align-items: center; gap: 10px; padding: 10px 14px; border-radius: 999px; font-weight: 600; border: 2px dashed rgba(255,255,255,0.2); }
.pill .dot { width: 10px; height: 10px; border-radius: 50%; background: currentColor; }

/* Sections */
.section { padding: var(--space-10) 0; }
.section.alt { background: var(--color-surface); border-top: 1px solid var(--color-border); border-bottom: 1px solid var(--color-border); }
.section h2 { font-size: clamp(22px, 3vw, 32px); margin: 0 0 var(--space-6); }

.cards { list-style: none; display: grid; grid-template-columns: repeat(3, minmax(0, 1fr)); gap: var(--space-6); padding: 0; margin: 0; }
.card { background: #FFFFFF; border: 1px solid var(--color-border); border-radius: var(--radius); padding: var(--space-7); box-shadow: var(--shadow); position: relative; overflow: hidden; }
.card::after { content: ""; position: absolute; right: -40px; top: -40px; width: 120px; height: 120px; background: radial-gradient(closest-side, rgba(255,255,255,0.08), transparent); transform: rotate(12deg); }
.card h3 { margin-top: 0; margin-bottom: var(--space-3); font-size: 20px; }
.card p { color: var(--color-text-muted); margin: 0; }

.grid.portfolio { display: grid; grid-template-columns: repeat(4, minmax(0, 1fr)); gap: var(--space-6); }
.tile { position: relative; overflow: hidden; border-radius: var(--radius); border: 1px solid var(--color-border); background: #ffffff; }
.tile img { width: 100%; height: 100%; object-fit: cover; aspect-ratio: 3 / 2; transition: transform .4s ease; }
.tile:hover img { transform: scale(1.04); }
.tile-caption { position: absolute; left: 12px; bottom: 12px; background: var(--color-primary); color: var(--color-primary-contrast); padding: 8px 14px; border-radius: 999px; font-size: 14px; border: 1px solid var(--color-border); box-shadow: 0 6px 16px rgba(0,0,0,0.12); }

.contact-list { list-style: none; padding: 0; margin: 0; display: grid; gap: var(--space-3); }
.contact-list a { color: var(--color-primary); }
.contact-list a:hover { text-decoration: underline; }

/* Footer */
.site-footer { border-top: 1px solid var(--color-border); background: #FFFFFF; }
.footer-inner { display: flex; align-items: center; justify-content: center; padding: var(--space-8) 0; color: var(--color-text-muted); font-size: 14px; }

/* Responsive */
@media (max-width: 960px) {
    .cards { grid-template-columns: repeat(2, minmax(0, 1fr)); }
    .grid.portfolio { grid-template-columns: repeat(2, minmax(0, 1fr)); }
}

@media (max-width: 640px) {
    .header-inner { min-height: 56px; }
    .nav-toggle { display: inline-flex; }
    .nav-menu { position: absolute; right: 16px; top: 64px; flex-direction: column; background: var(--color-surface); border: 1px solid var(--color-border); border-radius: 12px; padding: var(--space-4); box-shadow: var(--shadow); display: none; min-width: 180px; }
    .nav-menu.open { display: flex; }
    .cards { grid-template-columns: 1fr; }
    .grid.portfolio { grid-template-columns: 1fr; }
    .hero { padding: var(--space-9) 0 var(--space-8); }
}