/* ===== SHARED STYLES — Andrey Mamnev Portfolio ===== */
*, *::before, *::after { margin:0; padding:0; box-sizing:border-box; }

:root {
    --navy:       #050e1d;
    --navy-mid:   #0a1628;
    --navy-light: #0f2240;
    --navy-card:  #162d4a;
    --blue:       #0096cc;
    --cyan:       #00d4ff;
    --cyan-dim:   rgba(0,212,255,0.12);
    --cyan-glow:  rgba(0,212,255,0.35);
    --text:       #e2e8f0;
    --text-muted: #94a3b8;
    --text-dim:   #64748b;
    --border:     rgba(0,212,255,0.14);
    --border-hov: rgba(0,212,255,0.4);
    --gradient:   linear-gradient(135deg,#00d4ff,#0096cc);
    --nav-h:      64px;
}

html { scroll-behavior: smooth; }
body {
    font-family: 'Inter', sans-serif;
    background: var(--navy);
    color: var(--text);
    line-height: 1.6;
    overflow-x: hidden;
}
::-webkit-scrollbar { width:5px; }
::-webkit-scrollbar-track { background:var(--navy-mid); }
::-webkit-scrollbar-thumb { background:var(--blue); border-radius:3px; }

/* ── NAVBAR ── */
nav {
    position: fixed;
    inset: 0 0 auto 0;
    z-index: 1000;
    height: var(--nav-h);
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 2rem;
    background: rgba(5,14,29,0.93);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    transition: box-shadow .3s;
}
.nav-brand {
    font-family: 'Rajdhani', sans-serif;
    font-size: 1.4rem;
    font-weight: 700;
    color: #fff;
    text-decoration: none;
    letter-spacing: 1px;
    display: flex;
    align-items: center;
    gap: .5rem;
}
.nav-brand span { color: var(--cyan); }
.nav-brand-photo {
    width: 38px; height: 38px; border-radius: 50%;
    overflow: hidden; flex-shrink: 0;
    border: 1.5px solid var(--border);
    background: var(--navy-card);
    transition: border-color .25s ease, box-shadow .25s ease;
}
.nav-brand-photo img { width: 100%; height: 100%; object-fit: cover; display: block; }
.nav-brand:hover .nav-brand-photo {
    border-color: var(--cyan);
    box-shadow: 0 0 12px var(--cyan-glow);
}
.nav-links {
    display: flex;
    list-style: none;
    align-items: center;
    gap: .15rem;
}
.nav-links a {
    display: block;
    text-decoration: none;
    color: var(--text-muted);
    font-size: .78rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: .6px;
    padding: .45rem .9rem;
    border-radius: 6px;
    transition: color .2s, background .2s;
}
.nav-links a:hover,
.nav-links a.active { color: var(--cyan); background: var(--cyan-dim); }
.nav-cta {
    background: var(--gradient) !important;
    color: var(--navy) !important;
    font-weight: 700 !important;
}
.nav-cta:hover { opacity:.88; transform:translateY(-1px); box-shadow:0 4px 15px var(--cyan-glow); }
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    cursor: pointer;
    padding: 4px;
}
.hamburger span {
    display: block;
    width: 24px; height: 2px;
    background: var(--cyan);
    border-radius: 2px;
    transition: all .3s;
}

/* ── PAGE HERO BAND ── */
.page-hero {
    padding: calc(var(--nav-h) + 3rem) 2rem 3rem;
    text-align: center;
    background: var(--navy-mid);
    border-bottom: 1px solid var(--border);
    position: relative;
    overflow: hidden;
}
.page-hero::before {
    content:'';
    position:absolute; inset:0;
    background: radial-gradient(ellipse at 50% 100%, rgba(0,150,204,0.12) 0%, transparent 65%);
    pointer-events: none;
}
.page-hero .overline {
    font-size:.72rem; text-transform:uppercase; letter-spacing:3px;
    color:var(--cyan); font-weight:600; margin-bottom:.6rem;
    display:flex; align-items:center; justify-content:center; gap:.5rem;
}
.page-hero .overline::before, .page-hero .overline::after {
    content:''; width:20px; height:2px; background:var(--cyan);
}
.page-hero h1 {
    font-family:'Rajdhani',sans-serif;
    font-size:clamp(2rem,5vw,3.2rem);
    font-weight:700; color:#fff; margin-bottom:.75rem;
}
.page-hero p {
    color:var(--text-muted); font-size:1rem;
    max-width:600px; margin:0 auto;
}

/* ── SECTION BASE ── */
section { padding: 70px 2rem; }
.section-inner { max-width:1200px; margin:0 auto; }
.section-header { margin-bottom:2.5rem; }
.section-tag {
    display:inline-flex; align-items:center; gap:.5rem;
    font-size:.72rem; text-transform:uppercase; letter-spacing:3px;
    color:var(--cyan); font-weight:600; margin-bottom:.5rem;
}
.section-tag::before { content:''; width:18px; height:2px; background:var(--cyan); }
.section-title {
    font-family:'Rajdhani',sans-serif;
    font-size:clamp(1.8rem,3vw,2.4rem);
    font-weight:700; color:#fff;
}

/* ── BUTTONS ── */
.btn {
    display:inline-flex; align-items:center; gap:.45rem;
    padding:.72rem 1.6rem; border-radius:8px;
    font-weight:600; font-size:.88rem; text-decoration:none;
    transition:all .2s ease; border:none; cursor:pointer;
    font-family:'Inter',sans-serif;
}
.btn-primary { background:var(--gradient); color:var(--navy); }
.btn-primary:hover { transform:translateY(-2px); box-shadow:0 8px 26px var(--cyan-glow); }
.btn-outline { background:transparent; color:var(--cyan); border:1px solid var(--border-hov); }
.btn-outline:hover { background:var(--cyan-dim); transform:translateY(-2px); }

/* ── CARDS ── */
.card {
    background:var(--navy-light); border:1px solid var(--border);
    border-radius:12px; padding:1.5rem;
    transition:border-color .3s, box-shadow .3s, transform .3s;
}
.card:hover {
    border-color:var(--border-hov);
    box-shadow:0 0 28px rgba(0,212,255,.08);
    transform:translateY(-2px);
}

/* ── FOOTER ── */
footer {
    background:var(--navy); border-top:1px solid var(--border);
    padding:1.75rem 2rem; text-align:center;
}
footer p { color:var(--text-dim); font-size:.82rem; }
footer a { color:var(--cyan); text-decoration:none; }

/* ── SCROLL REVEAL ── */
.reveal { opacity:0; transform:translateY(20px); transition:opacity .6s ease, transform .6s ease; }
.reveal.visible { opacity:1; transform:translateY(0); }

/* ── RESPONSIVE ── */
@media(max-width:800px){
    .nav-links {
        display:none; position:fixed;
        top:var(--nav-h); left:0; right:0;
        background:rgba(5,14,29,.97); backdrop-filter:blur(14px);
        flex-direction:column; padding:1rem 1.5rem;
        border-bottom:1px solid var(--border); gap:.25rem;
    }
    .nav-links.open { display:flex; }
    .hamburger { display:flex; }
}
@media(max-width:480px){
    section { padding:50px 1.25rem; }
}