/* ============================================
   ALEKSEI FURMANOV — PORTFOLIO SITE
   Shared styles across all pages
   ============================================ */

:root {
    --bg: #0b0b0b;
    --text: #ffffff;
    --text-muted: rgba(255, 255, 255, 0.75);
    --border: rgba(255, 255, 255, 0.07);
    --accent: #c8291a;
    --accent-dim: rgba(200, 41, 26, 0.18);
    --font-display: 'Oswald', 'Arial Narrow', sans-serif;
    --font-body: 'Helvetica Neue', Helvetica, Arial, sans-serif;
    --page-pad: 36px;
    --header-height: 100px;
}

/* --- RESET & BASE --- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

html {
    scroll-behavior: smooth;
    background: var(--bg);
    scrollbar-gutter: stable;
    overflow-y: scroll;
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
}

a {
    text-decoration: none;
    color: inherit;
    transition: opacity 0.25s ease;
}

a:hover { opacity: 0.6; }

img {
    display: block;
    width: 100%;
    height: auto;
}

/* --- HEADER --- */
header {
    position: fixed;
    top: 0; left: 0;
    width: 100%;
    padding: 22px var(--page-pad);
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    background: rgba(11, 11, 11, 0.94);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    z-index: 500;
    box-sizing: border-box;
    transform: translateZ(0);
    -webkit-transform: translateZ(0);
}

.site-name {
    font-family: var(--font-display);
    font-size: 3.2rem;
    font-weight: 200;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    line-height: 1;
    flex-shrink: 0;
    text-rendering: geometricPrecision;
    -webkit-font-smoothing: antialiased;
}

.site-nav {
    display: flex;
    gap: 36px;
    flex-shrink: 0;
}

.site-nav a {
    font-family: var(--font-display);
    font-size: 2.9rem;
    font-weight: 200;
    text-transform: uppercase;
    letter-spacing: 0.04em;
    line-height: 1;
    opacity: 0.55;
    display: inline-block;
    text-rendering: geometricPrecision;
    -webkit-font-smoothing: antialiased;
}

.site-nav a:hover { opacity: 0.85; }
.site-nav a.active { opacity: 1; }

/* --- FOOTER (minimal) --- */
footer {
    padding: 50px var(--page-pad);
    text-align: center;
    font-size: 0.75rem;
    color: var(--text-muted);
    opacity: 0.3;
    letter-spacing: 0.05em;
}

/* ─────────────────────────────────────────────
   FILM GRAIN OVERLAY
   ─────────────────────────────────────────── */
.grain {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 9000;
    opacity: 0.042;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='300' height='300'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.85' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)'/%3E%3C/svg%3E");
    background-repeat: repeat;
    background-size: 200px;
    animation: grain 0.65s steps(1) infinite;
}

@keyframes grain {
    0%   { background-position: 0 0; }
    15%  { background-position: -4% -9%; }
    30%  { background-position: -14% 4%; }
    45%  { background-position: 8% -22%; }
    60%  { background-position: -6% 24%; }
    75%  { background-position: 14% 2%; }
    90%  { background-position: 1% 14%; }
    100% { background-position: 0 0; }
}



/* ─────────────────────────────────────────────
   SCROLL PROGRESS BAR
   ─────────────────────────────────────────── */
.scroll-progress {
    position: fixed;
    top: 0; left: 0;
    height: 1.5px;
    width: 0%;
    background: var(--accent);
    z-index: 9999;
    pointer-events: none;
    transition: width 0.07s linear;
}

/* ─────────────────────────────────────────────
   SCROLL REVEAL
   ─────────────────────────────────────────── */
.reveal {
    opacity: 0;
    transform: translateY(22px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

.reveal.visible {
    opacity: 1;
    transform: translateY(0);
}

/* ─────────────────────────────────────────────
   SIDEBAR — improved hover
   ─────────────────────────────────────────── */
.film-list a {
    position: relative;
    display: inline-block;
    padding-bottom: 2px;
}

.film-list a::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent);
    transition: width 0.3s ease;
}

.film-list a:hover::after,
.film-list a.active::after {
    width: 100%;
}

.film-list a:hover { opacity: 0.95; color: var(--text); }
.film-list a.active { color: var(--text); opacity: 1; }

/* ─────────────────────────────────────────────
   REDUCED MOTION
   ─────────────────────────────────────────── */
@media (prefers-reduced-motion: reduce) {
    .reveal { opacity: 1; transform: none; transition: none; }
    .grain { animation: none; background-image: none; opacity: 0; }
    .cursor-ring { display: none !important; }
    * { cursor: auto !important; }
}

/* --- RESPONSIVE --- */
@media (max-width: 768px) {
    :root {
        --page-pad: 20px;
        --header-height: 90px;
    }
    header {
        padding: 18px var(--page-pad);
        flex-direction: column;
        gap: 10px;
    }
    .site-name { font-size: 1.6rem; }
    .site-nav a { font-size: 1.4rem; }
    .site-nav { gap: 24px; }
}