/* ── Reset ── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

/* ── Focus styles for keyboard navigation ── */
:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.social-btn:focus-visible,
.cta-btn:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
    box-shadow: 0 0 0 4px var(--accent-glow);
}

:root {
    --bg:            #050505;
    --bg-card:       #0c0c0c;
    --bg-card-hover: #141414;
    --border:        #1a1a1a;
    --border-hover:  #2a2a2a;
    --text:          #ededed;
    --text-dim:      #8a8a8a;
    --text-muted:    #6b6b6b;
    --accent:        #dc2626;
    --accent-glow:   rgba(220, 38, 38, 0.12);
    --blue:          #3b82f6;
    --green:         #22c55e;
    --orange:        #f59e0b;
    --font:          'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --mono:          'JetBrains Mono', 'Fira Code', monospace;
    --max-w:         720px;
    --gap:           64px;
    --radius:        16px;
}

html {
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    scrollbar-width: thin;
    scrollbar-color: var(--border) var(--bg);
}

@media (prefers-reduced-motion: no-preference) {
    html {
        scroll-behavior: smooth;
    }
}

body {
    font-family: var(--font);
    background: var(--bg);
    color: var(--text);
    line-height: 1.5;
    min-height: 100vh;
    overflow-x: hidden;
    position: relative;
}

/* ── Visually hidden (screen-reader only) ── */
.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ── Animated Background ── */
.bg-grid {
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 80px 80px;
    pointer-events: none;
    z-index: 0;
    mask-image: radial-gradient(ellipse 50% 40% at 50% 20%, black 10%, transparent 60%);
    -webkit-mask-image: radial-gradient(ellipse 50% 40% at 50% 20%, black 10%, transparent 60%);
}

.bg-glow {
    position: fixed;
    border-radius: 50%;
    filter: blur(120px);
    pointer-events: none;
    z-index: 0;
    animation: glowDrift 12s ease-in-out infinite;
    will-change: transform;
    contain: strict;
}

.bg-glow--1 {
    width: 600px;
    height: 600px;
    background: rgba(220, 38, 38, 0.08);
    top: -15%;
    left: -5%;
    animation-delay: 0s;
}

.bg-glow--2 {
    width: 500px;
    height: 500px;
    background: rgba(59, 130, 246, 0.06);
    bottom: -15%;
    right: -5%;
    animation-delay: -6s;
}

@keyframes glowDrift {
    0%, 100% { transform: translate(0, 0) scale(1); }
    33% { transform: translate(30px, -20px) scale(1.05); }
    66% { transform: translate(-20px, 30px) scale(0.95); }
}

/* ── Container ── */
.container {
    position: relative;
    z-index: 1;
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 60px 24px 40px;
}

/* ── Fade-in ── */
@keyframes heroIn {
    from { opacity: 0; transform: translateY(20px); }
    to   { opacity: 1; transform: translateY(0); }
}

/* Scroll reveal base - individual elements only */
.about, .stack, .numbers, .contact {
    opacity: 0;
    transform: translateY(16px);
    transition: opacity 0.7s cubic-bezier(.16,1,.3,1), transform 0.7s cubic-bezier(.16,1,.3,1);
}

.about.revealed, .stack.revealed, .numbers.revealed, .contact.revealed {
    opacity: 1;
    transform: translateY(0);
}

/* ── Hero ── */
.hero {
    text-align: center;
    margin-bottom: 48px;
}

@media (prefers-reduced-motion: no-preference) {
    .hero {
        animation: heroIn 1s cubic-bezier(.16,1,.3,1) both;
    }
}

.hero-logos {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 16px;
    margin-bottom: 32px;
}

.logo-wrap, .avatar-wrap {
    position: relative;
}

.logo {
    width: 80px;
    height: 80px;
    border-radius: 20px;
    position: relative;
    z-index: 2;
    transition: transform 400ms cubic-bezier(.16,1,.3,1);
}

.logo:hover {
    transform: scale(1.05);
}

.logo-pulse {
    position: absolute;
    inset: -4px;
    border-radius: 24px;
    background: var(--accent);
    opacity: 0;
    z-index: 1;
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 0; transform: scale(1); }
    50% { opacity: 0.15; transform: scale(1.08); }
}

.avatar {
    width: 96px;
    height: 96px;
    border-radius: 50%;
    object-fit: cover;
    position: relative;
    z-index: 2;
    transition: transform 400ms cubic-bezier(.16,1,.3,1);
}

.avatar:hover {
    transform: scale(1.05);
}

.avatar-ring {
    position: absolute;
    inset: -3px;
    border-radius: 50%;
    border: 2px solid rgba(255,255,255,0.08);
    z-index: 1;
    transition: border-color 300ms ease;
}

.avatar-wrap:hover .avatar-ring {
    border-color: rgba(255,255,255,0.15);
}

/* Name gradient with @supports fallback */
.name {
    font-size: 2.75rem;
    font-weight: 800;
    letter-spacing: -0.035em;
    line-height: 1.1;
    margin-bottom: 16px;
    color: #ffffff;
}

@supports (-webkit-background-clip: text) or (background-clip: text) {
    .name {
        background: linear-gradient(180deg, #ffffff 0%, #b8b8b8 100%);
        -webkit-background-clip: text;
        -webkit-text-fill-color: transparent;
        background-clip: text;
        color: transparent;
    }
}

.name-line {
    display: block;
}

.name-accent {
    width: 56px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--accent), transparent);
    border-radius: 2px;
    margin: 0 auto 20px;
}

.title {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 12px;
    margin-bottom: 8px;
}

.title-word {
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.16em;
}

.title-sep {
    color: var(--text-muted);
    font-weight: 300;
}

.location {
    font-size: 0.8125rem;
    color: var(--text-muted);
    margin-bottom: 28px;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: 12px;
}

.social-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: 12px;
    color: var(--text-muted);
    background: var(--bg-card);
    border: 1px solid var(--border);
    transition:
        color 300ms cubic-bezier(.16,1,.3,1),
        border-color 300ms cubic-bezier(.16,1,.3,1),
        background 300ms cubic-bezier(.16,1,.3,1),
        transform 300ms cubic-bezier(.16,1,.3,1),
        box-shadow 300ms cubic-bezier(.16,1,.3,1);
    text-decoration: none;
}

.social-btn:hover {
    color: var(--text);
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    transform: translateY(-3px);
    box-shadow: 0 8px 24px rgba(0,0,0,0.4);
}

/* Primary social button - Telegram accent */
.social-btn--primary {
    color: var(--text-dim);
    border-color: rgba(220,38,38,0.25);
    background: rgba(220,38,38,0.06);
}

.social-btn--primary:hover {
    border-color: rgba(220,38,38,0.4);
    background: rgba(220,38,38,0.1);
}

.social-btn svg {
    width: 20px;
    height: 20px;
}

/* ── About ── */
.about {
    margin-bottom: var(--gap);
    text-align: center;
    padding: 32px;
    border-radius: var(--radius);
    background: linear-gradient(135deg, rgba(20,20,20,0.5) 0%, rgba(12,12,12,0.3) 100%);
    border: 1px solid rgba(255,255,255,0.03);
}

.about p {
    color: var(--text-dim);
    font-size: 1.0625rem;
    max-width: 560px;
    margin: 0 auto;
    line-height: 1.7;
}

/* ── Expertise ── */
.expertise {
    margin-bottom: var(--gap);
}

.expertise-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 20px;
}

/* Single consolidated .exp-card block */
.exp-card {
    background: linear-gradient(135deg, rgba(20,20,20,1) 0%, rgba(12,12,12,1) 100%);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 24px;
    cursor: default;
    position: relative;
    overflow: hidden;
    /* Scroll reveal */
    opacity: 0;
    transform: translateY(12px);
    transition:
        opacity 0.6s cubic-bezier(.16,1,.3,1),
        transform 0.4s cubic-bezier(.16,1,.3,1),
        border-color 0.3s ease,
        box-shadow 0.3s ease;
}

.exp-card.revealed {
    opacity: 1;
    transform: translateY(0);
}

.exp-card:nth-child(2).revealed { transition-delay: 0.08s; }
.exp-card:nth-child(3).revealed { transition-delay: 0.16s; }
.exp-card:nth-child(4).revealed { transition-delay: 0.24s; }

/* Subtle top-edge shine */
.exp-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.06), transparent);
}

.exp-card:hover {
    will-change: transform;
    border-color: var(--border-hover);
    box-shadow: 0 12px 40px rgba(0,0,0,0.4);
}

.exp-card[data-color="red"]:hover { border-color: rgba(220,38,38,0.3); box-shadow: 0 12px 40px rgba(220,38,38,0.06); }
.exp-card[data-color="blue"]:hover { border-color: rgba(59,130,246,0.3); box-shadow: 0 12px 40px rgba(59,130,246,0.06); }
.exp-card[data-color="green"]:hover { border-color: rgba(34,197,94,0.3); box-shadow: 0 12px 40px rgba(34,197,94,0.06); }
.exp-card[data-color="orange"]:hover { border-color: rgba(245,158,11,0.3); box-shadow: 0 12px 40px rgba(245,158,11,0.06); }

.exp-icon {
    width: 44px;
    height: 44px;
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    transition: transform 300ms ease;
}

.exp-card:hover .exp-icon {
    transform: scale(1.1);
}

.exp-card[data-color="red"] .exp-icon { background: rgba(220,38,38,0.1); color: var(--accent); }
.exp-card[data-color="blue"] .exp-icon { background: rgba(59,130,246,0.1); color: var(--blue); }
.exp-card[data-color="green"] .exp-icon { background: rgba(34,197,94,0.1); color: var(--green); }
.exp-card[data-color="orange"] .exp-icon { background: rgba(245,158,11,0.1); color: var(--orange); }

.exp-icon svg {
    width: 24px;
    height: 24px;
}

.exp-card h3 {
    font-size: 1.0625rem;
    font-weight: 600;
    margin-bottom: 8px;
    letter-spacing: -0.02em;
}

.exp-card p {
    font-size: 0.8125rem;
    color: var(--text-dim);
    line-height: 1.6;
}

/* ── Projects ── */
.projects {
    margin-bottom: var(--gap);
}

.projects-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

/* Single consolidated .project-card block */
.project-card {
    background: linear-gradient(135deg, rgba(20,20,20,1) 0%, rgba(12,12,12,1) 100%);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 28px 32px;
    position: relative;
    overflow: hidden;
    /* Scroll reveal */
    opacity: 0;
    transform: translateY(12px);
    transition:
        opacity 0.6s cubic-bezier(.16,1,.3,1),
        transform 0.4s cubic-bezier(.16,1,.3,1),
        border-color 0.3s ease,
        box-shadow 0.3s ease;
}

/* Color-coded left borders */
.project-card:nth-child(1) { border-left: 2px solid rgba(220,38,38,0.4); }
.project-card:nth-child(2) { border-left: 2px solid rgba(59,130,246,0.4); }
.project-card:nth-child(3) { border-left: 2px solid rgba(34,197,94,0.4); }

.project-card.revealed {
    opacity: 1;
    transform: translateY(0);
}

.project-card:nth-child(2).revealed { transition-delay: 0.08s; }
.project-card:nth-child(3).revealed { transition-delay: 0.16s; }

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 1px;
    background: linear-gradient(90deg, transparent, rgba(255,255,255,0.06), transparent);
}

.project-card:hover {
    border-color: var(--border-hover);
    box-shadow: 0 8px 32px rgba(0,0,0,0.3);
}

.project-header {
    display: flex;
    align-items: center;
    gap: 16px;
    margin-bottom: 14px;
}

.project-icon {
    width: 40px;
    height: 40px;
    border-radius: 10px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.project-icon svg {
    width: 22px;
    height: 22px;
}

.project-icon--red { background: rgba(220,38,38,0.1); color: var(--accent); }
.project-icon--blue { background: rgba(59,130,246,0.1); color: var(--blue); }
.project-icon--green { background: rgba(34,197,94,0.1); color: var(--green); }

.project-header h3 {
    font-size: 1rem;
    font-weight: 600;
    letter-spacing: -0.01em;
    margin-bottom: 2px;
}

.project-tag {
    font-family: var(--mono);
    font-size: 0.6875rem;
    color: var(--text-muted);
    font-weight: 500;
}

.project-card > p {
    font-size: 0.8125rem;
    color: var(--text-dim);
    line-height: 1.6;
    margin-bottom: 14px;
}

.project-stack {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    list-style: none;
}

.project-stack li {
    font-family: var(--mono);
    font-size: 0.6875rem;
    font-weight: 500;
    padding: 4px 10px;
    background: rgba(255,255,255,0.04);
    border: 1px solid rgba(255,255,255,0.08);
    border-radius: 100px;
    color: var(--text-dim);
}

/* ── Section Label ── */
.section-label {
    text-align: center;
    font-size: 0.6875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.2em;
    color: var(--text-dim);
    margin-bottom: 24px;
}

/* ── Stack ── */
.stack {
    margin-bottom: var(--gap);
}

.stack-flow {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 10px;
    list-style: none;
}

.pill {
    display: inline-block;
    font-family: var(--mono);
    font-size: 0.75rem;
    font-weight: 500;
    padding: 8px 16px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 100px;
    color: var(--text-dim);
    transition:
        background 250ms cubic-bezier(.16,1,.3,1),
        border-color 250ms cubic-bezier(.16,1,.3,1),
        color 250ms cubic-bezier(.16,1,.3,1),
        transform 250ms cubic-bezier(.16,1,.3,1);
    user-select: none;
    white-space: nowrap;
}

.pill:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    color: var(--text);
    transform: translateY(-2px);
}

/* Softer accent pills */
.pill.accent {
    border-color: rgba(220, 38, 38, 0.15);
    color: #f87171;
    background: rgba(220, 38, 38, 0.05);
}

.pill.accent:hover {
    background: rgba(220, 38, 38, 0.08);
    border-color: rgba(220, 38, 38, 0.4);
}

/* ── Numbers ── */
.numbers {
    display: flex;
    justify-content: center;
    align-items: center;
    gap: 48px;
    margin-bottom: var(--gap);
    padding: 48px 40px;
    background: linear-gradient(135deg, rgba(20,20,20,0.5) 0%, rgba(12,12,12,0.3) 100%);
    border: 1px solid var(--border);
    border-radius: var(--radius);
}

.number-item {
    text-align: center;
}

.number-value {
    display: block;
    font-size: 2.75rem;
    font-weight: 800;
    letter-spacing: -0.04em;
    color: var(--text);
    line-height: 1.1;
}

.number-label {
    font-size: 0.8125rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 500;
    margin-top: 6px;
    display: block;
}

.number-sep {
    width: 1px;
    height: 40px;
    background: var(--border);
}

/* ── Contact ── */
.contact {
    text-align: center;
    padding-top: 48px;
    padding-bottom: 16px;
    border-top: 1px solid var(--border);
}

.contact-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    flex-wrap: wrap;
}

/* CTA buttons */
.cta-btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    border-radius: 12px;
    font-size: 0.9375rem;
    font-weight: 500;
    text-decoration: none;
    transition:
        transform 300ms cubic-bezier(.16,1,.3,1),
        box-shadow 300ms cubic-bezier(.16,1,.3,1),
        background 300ms cubic-bezier(.16,1,.3,1),
        border-color 300ms cubic-bezier(.16,1,.3,1),
        color 300ms cubic-bezier(.16,1,.3,1);
}

.cta-btn svg {
    width: 20px;
    height: 20px;
}

/* Primary CTA - subtle accent */
.cta-btn--primary {
    background: rgba(220,38,38,0.1);
    color: #ef4444;
    border: 1px solid rgba(220,38,38,0.25);
}

.cta-btn--primary:hover {
    transform: translateY(-3px);
    background: rgba(220,38,38,0.15);
    border-color: rgba(220,38,38,0.4);
    box-shadow: 0 12px 36px rgba(220,38,38,0.1);
}

.cta-btn--ghost {
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text-dim);
}

.cta-btn--ghost:hover {
    border-color: var(--border-hover);
    color: var(--text);
    background: var(--bg-card);
    transform: translateY(-3px);
    box-shadow: 0 12px 36px rgba(0,0,0,0.3);
}

/* ── Footer ── */
.site-footer {
    text-align: center;
    padding: 32px 24px;
    font-size: 0.75rem;
    color: var(--text-muted);
    position: relative;
    z-index: 1;
}

/* ── Mobile ── */
@media (max-width: 640px) {
    :root {
        --gap: 48px;
    }

    .container {
        padding: 40px 20px 40px;
    }

    .name {
        font-size: 2rem;
    }

    .title {
        flex-direction: column;
        gap: 6px;
    }

    .title-sep {
        display: none;
    }

    .hero-logos {
        gap: 12px;
    }

    .logo {
        width: 64px;
        height: 64px;
    }

    .avatar {
        width: 80px;
        height: 80px;
    }

    .about {
        padding: 24px 20px;
    }

    .expertise-grid {
        grid-template-columns: 1fr;
    }

    .project-card {
        padding: 24px 20px;
    }

    .numbers {
        gap: 24px;
        padding: 36px 24px;
    }

    .number-value {
        font-size: 2rem;
    }

    .contact-buttons {
        flex-direction: column;
        align-items: center;
    }

    .cta-btn {
        width: 100%;
        max-width: 320px;
        justify-content: center;
    }

    .bg-glow--1 {
        width: 300px;
        height: 300px;
    }

    .bg-glow--2 {
        width: 250px;
        height: 250px;
    }
}

/* ── Reduced Motion ── */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .about, .stack, .numbers, .contact, .exp-card, .project-card {
        opacity: 1;
        transform: none;
    }
}

/* ── Selection ── */
::selection {
    background: rgba(220, 38, 38, 0.25);
    color: var(--text);
}

/* ── Scrollbar (WebKit) ── */
::-webkit-scrollbar {
    width: 6px;
}

::-webkit-scrollbar-track {
    background: var(--bg);
}

::-webkit-scrollbar-thumb {
    background: var(--border);
    border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--border-hover);
}