:root,
[data-theme="light"] {
  --bg:            #F5F5F7;
  --bg-secondary:  #FFFFFF;
  --bg-tertiary:   #F0F0F2;
  --surface:       #FFFFFF;
  --surface-hover: #F0F0F2;
  --ink:           #1D1D1F;
  --ink-2:         #6E6E73;
  --ink-3:         #AEAEB2;
  --border:        rgba(0,0,0,.08);
  --border-subtle: rgba(0,0,0,.05);
  --accent:        #0071E3;
  --accent-hover:  #0077ED;
  --accent-light:  rgba(0,113,227,.08);
  --shadow-sm:     0 1px 3px rgba(0,0,0,.06), 0 1px 2px rgba(0,0,0,.04);
  --shadow-md:     0 4px 16px rgba(0,0,0,.08), 0 2px 4px rgba(0,0,0,.04);
  --shadow-lg:     0 12px 40px rgba(0,0,0,.10), 0 4px 8px rgba(0,0,0,.04);
  color-scheme: light;
}
[data-theme="dark"] {
  --bg:            #07070E;
  --bg-secondary:  #0F0F1C;
  --bg-tertiary:   #1C1C2E;
  --surface:       #111120;
  --surface-hover: #1A1A2E;
  --ink:           rgba(255,255,255,.93);
  --ink-2:         rgba(255,255,255,.50);
  --ink-3:         rgba(255,255,255,.28);
  --border:        rgba(255,255,255,.14);
  --border-subtle: rgba(255,255,255,.07);
  --accent:        #A78BFA;
  --accent-hover:  #C4B5FD;
  --accent-light:  rgba(167,139,250,.15);
  --shadow-sm:     0 1px 3px rgba(0,0,0,.5), 0 1px 2px rgba(0,0,0,.4);
  --shadow-md:     0 4px 16px rgba(0,0,0,.6), 0 2px 4px rgba(0,0,0,.4);
  --shadow-lg:     0 12px 40px rgba(0,0,0,.7), 0 4px 8px rgba(0,0,0,.4);
  color-scheme: dark;
}
*{box-sizing:border-box}
html,body{margin:0;background:var(--bg);color:var(--ink);font:16px/1.6 'Inter',-apple-system,BlinkMacSystemFont,'SF Pro Display',system-ui,sans-serif;-webkit-font-smoothing:antialiased;letter-spacing:-.01em;transition:background-color .25s ease, color .25s ease}
body{min-height:100vh;display:flex;flex-direction:column}
*{scrollbar-width:thin;scrollbar-color:var(--accent) transparent}
*::-webkit-scrollbar{width:10px;height:10px}
*::-webkit-scrollbar-track{background:transparent}
*::-webkit-scrollbar-thumb{background:var(--accent);border-radius:5px;border:2px solid var(--bg)}
*::-webkit-scrollbar-thumb:hover{background:var(--accent-hover)}

/* Header */
.site-header{display:flex;align-items:center;justify-content:space-between;padding:20px 28px;max-width:1280px;margin:0 auto;width:100%}
.brand{display:flex;align-items:center;gap:12px;text-decoration:none;color:var(--ink)}
.brand-mark{width:40px;height:40px;border-radius:10px;background:var(--accent);display:flex;align-items:center;justify-content:center;color:#fff;font-size:1.1rem;box-shadow:var(--shadow-sm)}
.brand-name{font-weight:800;font-size:1.05rem;letter-spacing:-.01em}
.header-actions{display:flex;align-items:center;gap:10px}
.theme-toggle{appearance:none;border:1px solid var(--border);background:var(--surface);color:var(--ink);width:38px;height:38px;border-radius:10px;cursor:pointer;display:inline-flex;align-items:center;justify-content:center;transition:background .15s ease, border-color .15s ease, transform .08s ease;box-shadow:var(--shadow-sm)}
.theme-toggle:hover{background:var(--surface-hover)}
.theme-toggle:active{transform:scale(.96)}
[data-theme="dark"] .theme-toggle .icon-sun{display:inline-block}
[data-theme="dark"] .theme-toggle .icon-moon{display:none}
[data-theme="light"] .theme-toggle .icon-sun, :root .theme-toggle .icon-sun{display:none}
[data-theme="light"] .theme-toggle .icon-moon, :root .theme-toggle .icon-moon{display:inline-block}

/* Page main */
.page-main{flex:1;max-width:820px;margin:24px auto 60px;padding:0 24px;width:100%}
.page-main h1{font-size:clamp(2rem,4vw,2.8rem);font-weight:800;letter-spacing:-.03em;line-height:1.1;margin:0 0 12px;color:var(--ink)}
.page-main .lead{color:var(--ink-2);font-size:1.05rem;margin:0 0 32px}
.page-main h2{font-size:1.3rem;font-weight:700;letter-spacing:-.02em;margin:32px 0 12px;color:var(--ink)}
.page-main h3{font-size:1.05rem;font-weight:700;margin:24px 0 8px;color:var(--ink)}
.page-main p,.page-main li{color:var(--ink);font-size:.98rem;line-height:1.7}
.page-main ul{padding-left:22px;margin:0 0 16px}
.page-main li{margin-bottom:6px}
.page-main a{color:var(--accent)}
.page-main a:hover{color:var(--accent-hover)}
.page-main .card{background:var(--surface);border:1px solid var(--border-subtle);border-radius:14px;padding:22px;box-shadow:var(--shadow-sm);margin:14px 0 18px}
.page-main .muted{color:var(--ink-2);font-size:.92rem}
.page-main .updated{display:inline-block;font-size:.78rem;color:var(--ink-3);background:var(--bg-tertiary);border:1px solid var(--border-subtle);padding:3px 10px;border-radius:999px;margin-bottom:18px}

/* Contact form */
.contact-form{display:flex;flex-direction:column;gap:14px;max-width:560px}
.contact-form label{font-weight:600;font-size:.85rem;color:var(--ink-2);text-transform:uppercase;letter-spacing:.05em;display:block;margin-bottom:6px}
.contact-form input,.contact-form textarea{background:var(--surface);border:1px solid var(--border);color:var(--ink);padding:11px 14px;border-radius:10px;font:inherit;width:100%;transition:border-color .15s ease, box-shadow .15s ease}
.contact-form textarea{min-height:140px;resize:vertical;font-family:inherit;line-height:1.55}
.contact-form input:focus,.contact-form textarea:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-light)}
.contact-form input::placeholder,.contact-form textarea::placeholder{color:var(--ink-3)}
.contact-form button{appearance:none;border:0;background:var(--accent);color:#fff;padding:12px 22px;border-radius:10px;font-weight:600;cursor:pointer;font-family:inherit;font-size:.98rem;align-self:flex-start;display:inline-flex;align-items:center;gap:8px;box-shadow:var(--shadow-sm);transition:background .15s ease, transform .08s ease}
.contact-form button:hover{background:var(--accent-hover);transform:translateY(-1px)}
.contact-form .form-status{font-size:.9rem;min-height:1.2em}
.contact-form .form-status.ok{color:#15803D}
[data-theme="dark"] .contact-form .form-status.ok{color:#34D399}

/* Footer (shared) */
.site-footer{margin-top:80px;background:var(--bg-secondary);border-top:1px solid var(--border-subtle);padding:48px 24px 28px}
.footer-grid{max-width:1180px;margin:0 auto;display:grid;gap:40px;grid-template-columns:1.2fr 1.4fr 1fr}
@media (max-width:760px){ .footer-grid{grid-template-columns:1fr;gap:32px} }
.footer-col{min-width:0}
.footer-brand{display:flex;align-items:center;gap:12px}
.footer-brand .brand-mark{width:36px;height:36px}
.footer-brand .brand-name{font-weight:700;font-size:1rem;letter-spacing:-.01em;color:var(--ink)}
.footer-tagline{margin:14px 0 0;color:var(--ink-2);font-size:.92rem;line-height:1.5;max-width:340px}
.footer-h{font-size:.78rem;font-weight:700;color:var(--ink);text-transform:uppercase;letter-spacing:.06em;margin:0 0 12px}
.footer-sub{margin:0 0 12px;color:var(--ink-2);font-size:.88rem}
.newsletter{display:flex;gap:8px;flex-wrap:wrap}
.newsletter input[type=email]{flex:1;min-width:180px;background:var(--surface);border:1px solid var(--border);color:var(--ink);padding:11px 14px;border-radius:10px;font:inherit;font-size:.92rem;transition:border-color .15s ease, box-shadow .15s ease}
.newsletter input[type=email]:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 3px var(--accent-light)}
.newsletter input[type=email]::placeholder{color:var(--ink-3)}
.newsletter-btn{appearance:none;border:0;background:var(--accent);color:#fff;padding:11px 16px;border-radius:10px;font-weight:600;cursor:pointer;display:inline-flex;align-items:center;gap:7px;font-size:.92rem;font-family:inherit;transition:background .15s ease, transform .08s ease}
.newsletter-btn:hover{background:var(--accent-hover);transform:translateY(-1px)}
.footer-status{margin-top:10px;font-size:.84rem;min-height:1.2em;color:var(--ink-2)}
.footer-status.ok{color:#15803D}
[data-theme="dark"] .footer-status.ok{color:#34D399}
.footer-links{list-style:none;padding:0;margin:0;display:flex;flex-direction:column;gap:8px}
.footer-links a{color:var(--ink-2);font-size:.92rem;text-decoration:none}
.footer-links a:hover{color:var(--accent);text-decoration:underline}
.footer-legal{max-width:1180px;margin:36px auto 0;padding-top:24px;border-top:1px solid var(--border-subtle);font-size:.78rem;line-height:1.6;color:var(--ink-3)}
.footer-legal p{margin:0 0 12px}
.footer-legal strong{color:var(--ink-2)}
.footer-copy{margin-top:14px !important;color:var(--ink-3)}