:root {
    --bg: #030303;
    --text-main: #f5f5f5;
    --text-secondary: #a8a8a8;
    --text-muted: #606060;
    --accent: #ffffff;
    --border: rgba(255, 255, 255, 0.1);
    --btn-bg: rgba(20, 20, 20, 0.65);
    --btn-border: rgba(255, 255, 255, 0.16);
}

* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    -webkit-text-size-adjust: 100%;
    /* Hide scrollbar for IE, Edge and Firefox */
    -ms-overflow-style: none;
    scrollbar-width: none;
}

/* Hide scrollbar for Chrome, Safari and Opera */
::-webkit-scrollbar {
    display: none;
}

body {
    background-color: var(--bg);
    color: var(--text-main);
    font-family: 'JetBrains Mono', monospace;
    min-height: 100vh;
    min-height: 100dvh;
    overflow-x: hidden;
    overflow-y: auto;
    -webkit-overflow-scrolling: touch;
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

/* Canvas Engine */
#canvas-container {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    z-index: 1;
    background: #000000;
    pointer-events: none;
}

canvas {
    display: block;
    width: 100%;
    height: 100%;
}

/* Затемняющая маска: изначально выключена (opacity: 0), включается только при появлении UI */
.scrim-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    height: 100dvh;
    background: 
        radial-gradient(ellipse at 25% 50%, rgba(3, 3, 3, 0.94) 0%, rgba(3, 3, 3, 0.78) 55%, rgba(3, 3, 3, 0.15) 100%),
        linear-gradient(to right, rgba(3, 3, 3, 0.96) 0%, rgba(3, 3, 3, 0.82) 40%, rgba(3, 3, 3, 0.1) 85%);
    z-index: 2;
    opacity: 0;
    transition: opacity 1.4s ease;
    pointer-events: none;
}

.scrim-overlay.active {
    opacity: 1;
}

/* UI Wrapper */
.ui-wrapper {
    position: relative;
    z-index: 10;
    min-height: 100vh;
    min-height: 100dvh;
    display: flex;
    flex-direction: column;
    justify-content: space-between;
    padding: 3rem 4.5rem;
    padding-top: max(3rem, env(safe-area-inset-top));
    padding-bottom: max(3rem, env(safe-area-inset-bottom));
    padding-left: max(4.5rem, env(safe-area-inset-left));
    padding-right: max(4.5rem, env(safe-area-inset-right));
    pointer-events: none;
}

.interactive {
    pointer-events: auto;
}

/* Fade-in для контента */
.fade-in-element {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 1s cubic-bezier(0.16, 1, 0.3, 1), transform 1s cubic-bezier(0.16, 1, 0.3, 1);
}

.ui-ready .fade-in-element {
    opacity: 1;
    transform: translateY(0);
}

.ui-ready header { transition-delay: 0.1s; }
.ui-ready .hero-tag { transition-delay: 0.25s; }
.ui-ready h1 { transition-delay: 0.4s; }
.ui-ready .highlight-box { transition-delay: 0.55s; }
.ui-ready .bio-text { transition-delay: 0.7s; }
.ui-ready .stack-matrix { transition-delay: 0.85s; }
.ui-ready .actions { transition-delay: 1.0s; }
.ui-ready footer { transition-delay: 1.15s; }

/* Header */
header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    letter-spacing: 0.08em;
    flex-wrap: wrap;
    gap: 0.5rem;
}

.brand {
    font-weight: 700;
    color: var(--accent);
    text-decoration: none;
    letter-spacing: 0.12em;
    display: inline-flex;
    align-items: center;
    word-break: break-word;
}

.location {
    color: var(--text-muted);
    font-size: 0.8rem;
    letter-spacing: 0.08em;
}

/* Main Content */
main {
    max-width: 700px;
    margin: 2rem 0;
}

.hero-tag {
    font-size: 0.8rem;
    color: #888;
    letter-spacing: 0.18em;
    text-transform: uppercase;
    margin-bottom: 1.2rem;
    font-weight: 600;
}

h1 {
    font-size: clamp(1.85rem, 4.8vw, 3.1rem);
    font-weight: 500;
    letter-spacing: -0.035em;
    line-height: 1.15;
    margin-bottom: 1.6rem;
    color: var(--accent);
    text-shadow: 0 4px 30px rgba(0, 0, 0, 0.9);
}

/* Lane Highlight */
.highlight-box {
    border-left: 2px solid rgba(255, 255, 255, 0.4);
    padding: 0.75rem 1.2rem;
    margin-bottom: 1.8rem;
    background: rgba(10, 10, 10, 0.55);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border-radius: 0 4px 4px 0;
}

.highlight-box p {
    font-size: 1.02rem;
    line-height: 1.65;
    color: #f0f0f0;
}

.highlight-box span.metric {
    color: #fff;
    font-weight: 700;
    border-bottom: 1px solid rgba(255, 255, 255, 0.4);
}

/* Bio */
.bio-text {
    font-size: 0.93rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-weight: 300;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.9);
}

/* Tech Stack */
.stack-matrix {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 2.5rem;
    font-size: 0.78rem;
}

.stack-matrix span {
    padding: 6px 12px;
    border: 1px solid var(--border);
    background: rgba(16, 16, 16, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    color: #aaa;
    border-radius: 3px;
    transition: color 0.2s ease, border-color 0.2s ease, background 0.2s ease, transform 0.2s ease;
}

.stack-matrix span:hover {
    color: #fff;
    border-color: rgba(255, 255, 255, 0.4);
    background: rgba(30, 30, 30, 0.95);
    transform: translateY(-1px);
}

/* Actions */
.actions {
    display: flex;
    gap: 1.25rem;
    flex-wrap: wrap;
    align-items: center;
}

.btn {
    font-size: 0.85rem;
    color: var(--text-main);
    text-decoration: none;
    letter-spacing: 0.08em;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 9px 18px;
    background: var(--btn-bg);
    border: 1px solid var(--btn-border);
    border-radius: 4px;
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    transition: all 0.2s ease;
    min-height: 42px;
    min-width: 120px;
}

.btn::before { content: "[ "; color: var(--text-muted); transition: 0.2s; margin-right: 2px; }
.btn::after { content: " ]"; color: var(--text-muted); transition: 0.2s; margin-left: 2px; }

.btn:hover {
    color: #ffffff;
    border-color: rgba(255, 255, 255, 0.5);
    background: rgba(35, 35, 35, 0.85);
    box-shadow: 0 0 16px rgba(255, 255, 255, 0.12);
    transform: translateY(-1px);
}

.btn:active {
    transform: translateY(0);
    background: rgba(50, 50, 50, 0.9);
    border-color: rgba(255, 255, 255, 0.7);
}

.btn:hover::before, .btn:hover::after,
.btn:active::before, .btn:active::after {
    color: #ffffff;
}

/* Footer */
footer {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-muted);
    letter-spacing: 0.06em;
}

/* Tablet & Mobile Media Queries */
@media (max-width: 768px) {
    .ui-wrapper {
        padding: 2rem 1.5rem;
        padding-top: max(2rem, env(safe-area-inset-top));
        padding-bottom: max(2rem, env(safe-area-inset-bottom));
        padding-left: max(1.5rem, env(safe-area-inset-left));
        padding-right: max(1.5rem, env(safe-area-inset-right));
    }

    .scrim-overlay {
        /* На мобильных устройствах градиент мягче открывает верхне-правую область вихря */
        background: 
            radial-gradient(circle at 80% 25%, rgba(3, 3, 3, 0.50) 0%, rgba(3, 3, 3, 0.86) 55%, rgba(3, 3, 3, 0.97) 100%),
            linear-gradient(to bottom, rgba(3, 3, 3, 0.86) 0%, rgba(3, 3, 3, 0.93) 50%, rgba(3, 3, 3, 0.98) 100%);
    }

    header {
        flex-direction: column;
        align-items: flex-start;
        gap: 6px;
    }

    .brand {
        font-size: 0.9rem;
    }

    .location {
        font-size: 0.72rem;
        letter-spacing: 0.09em;
    }

    main {
        margin: 1.6rem 0;
    }

    .hero-tag {
        font-size: 0.72rem;
        letter-spacing: 0.14em;
        margin-bottom: 0.9rem;
    }

    h1 {
        font-size: clamp(1.6rem, 6.5vw, 2.2rem);
        line-height: 1.2;
        margin-bottom: 1.3rem;
    }

    .highlight-box {
        padding: 0.75rem 1rem;
        margin-bottom: 1.4rem;
        border-left-width: 3px;
    }

    .highlight-box p {
        font-size: 0.93rem;
        line-height: 1.6;
    }

    .bio-text {
        font-size: 0.88rem;
        line-height: 1.68;
        margin-bottom: 1.6rem;
    }

    .stack-matrix {
        gap: 6px;
        margin-bottom: 2rem;
        font-size: 0.74rem;
    }

    .stack-matrix span {
        padding: 5px 9px;
    }

    .actions {
        gap: 0.85rem;
    }

    .btn {
        flex: 1 1 auto;
        min-height: 44px;
        font-size: 0.82rem;
    }

    footer {
        flex-direction: column;
        gap: 8px;
        align-items: flex-start;
        margin-top: 1.5rem;
    }
}

/* Small Smartphone Devices (iPhone SE, Galaxy S, small viewports <= 420px) */
@media (max-width: 420px) {
    .ui-wrapper {
        padding: 1.5rem 1.15rem;
        padding-top: max(1.5rem, env(safe-area-inset-top));
        padding-bottom: max(1.5rem, env(safe-area-inset-bottom));
        padding-left: max(1.15rem, env(safe-area-inset-left));
        padding-right: max(1.15rem, env(safe-area-inset-right));
    }

    .brand {
        font-size: 0.84rem;
    }

    .location {
        font-size: 0.68rem;
    }

    h1 {
        font-size: 1.55rem;
        line-height: 1.22;
        margin-bottom: 1.15rem;
    }

    .highlight-box p {
        font-size: 0.88rem;
    }

    .bio-text {
        font-size: 0.84rem;
    }

    .stack-matrix {
        gap: 5px;
    }

    .stack-matrix span {
        padding: 4px 8px;
        font-size: 0.71rem;
    }

    .actions {
        flex-direction: column;
        width: 100%;
        gap: 0.65rem;
    }

    .btn {
        width: 100%;
    }
}