/* =================================================================
   Ayush Sah — Portfolio
   Terminal / Developer Aesthetic
   ================================================================= */

:root {
    /* Color palette — restrained terminal dark */
    --bg-0: #0a0e0c;          /* deepest background */
    --bg-1: #0f1411;          /* main background */
    --bg-2: #161c18;          /* cards / elevated */
    --bg-3: #1d2520;          /* hover / interactive */
    --border: #2a3530;        /* subtle borders */
    --border-bright: #3a4842; /* hover borders */

    --fg-0: #e8efea;          /* primary text */
    --fg-1: #b8c5be;          /* secondary text */
    --fg-2: #7a8a82;          /* tertiary / dim */
    --fg-3: #4a5a52;          /* very dim */

    --accent: #5ee895;        /* terminal green */
    --accent-dim: #3aa86a;
    --accent-glow: rgba(94, 232, 149, 0.15);
    --warning: #f0c674;
    --danger: #e06c75;

    /* Typography */
    --font-mono: 'JetBrains Mono', 'SF Mono', Menlo, Consolas, monospace;
    --font-serif: 'Fraunces', Georgia, serif;

    /* Layout */
    --max-w: 1100px;
    --gutter: clamp(1.25rem, 4vw, 2.5rem);
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 80px;
}

body {
    background: var(--bg-1);
    color: var(--fg-0);
    font-family: var(--font-mono);
    font-size: 15px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    overflow-x: hidden;
    min-height: 100vh;
}

/* Subtle scanlines for terminal feel */
.scanlines {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 100;
    background: repeating-linear-gradient(
        0deg,
        rgba(255, 255, 255, 0) 0px,
        rgba(255, 255, 255, 0) 2px,
        rgba(255, 255, 255, 0.012) 3px,
        rgba(255, 255, 255, 0) 4px
    );
}

.grain {
    position: fixed;
    inset: 0;
    pointer-events: none;
    z-index: 99;
    opacity: 0.04;
    background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 200 200' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='n'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='2' /%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23n)' /%3E%3C/svg%3E");
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color 0.15s ease, border-color 0.15s ease;
}

a:hover {
    color: var(--fg-0);
}

strong {
    color: var(--fg-0);
    font-weight: 500;
}

em {
    color: var(--accent);
    font-style: normal;
    font-family: var(--font-serif);
    font-style: italic;
    font-weight: 500;
}

::selection {
    background: var(--accent);
    color: var(--bg-0);
}

/* =====================  NAVIGATION  ===================== */
.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 50;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem var(--gutter);
    background: rgba(15, 20, 17, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    font-size: 13px;
}

.nav-logo {
    color: var(--fg-0);
    font-weight: 500;
    font-size: 14px;
    letter-spacing: -0.01em;
}

.nav-logo .prompt {
    color: var(--accent);
}

.nav-logo .cursor-static {
    color: var(--fg-2);
    margin-right: 0.3em;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 1.8rem;
    align-items: center;
}

.nav-links a {
    color: var(--fg-1);
    position: relative;
    padding: 0.2em 0;
}

.nav-links a::before {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 1px;
    background: var(--accent);
    transition: width 0.2s ease;
}

.nav-links a:hover {
    color: var(--fg-0);
}

.nav-links a:hover::before {
    width: 100%;
}

.nav-resume {
    padding: 0.5em 1em;
    border: 1px solid var(--accent-dim);
    border-radius: 3px;
    color: var(--accent);
    font-size: 13px;
    transition: all 0.2s ease;
}

.nav-resume:hover {
    background: var(--accent-glow);
    border-color: var(--accent);
    color: var(--accent);
}

.arrow {
    display: inline-block;
    transition: transform 0.2s ease;
}

a:hover .arrow,
.btn:hover .arrow {
    transform: translateX(2px);
}

/* =====================  HERO  ===================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 3rem;
    padding: 8rem var(--gutter) 4rem;
    max-width: var(--max-w);
    margin: 0 auto;
    flex-wrap: wrap;
}

.hero-inner {
    flex: 1 1 480px;
    animation: fadeUp 0.8s ease both;
}

.hero-meta {
    display: inline-flex;
    align-items: center;
    gap: 0.6em;
    font-size: 12px;
    color: var(--fg-2);
    margin-bottom: 2rem;
    padding: 0.4em 0.9em;
    border: 1px solid var(--border);
    border-radius: 100px;
    background: var(--bg-2);
}

.status-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    box-shadow: 0 0 8px var(--accent);
    animation: pulse 2s ease-in-out infinite;
}

.meta-sep {
    color: var(--fg-3);
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.4; }
}

.hero-name {
    font-family: var(--font-serif);
    font-size: clamp(3rem, 8vw, 5.5rem);
    font-weight: 600;
    line-height: 1;
    letter-spacing: -0.03em;
    margin-bottom: 1.5rem;
    color: var(--fg-0);
}

.hero-tagline {
    font-size: clamp(1rem, 2vw, 1.2rem);
    color: var(--fg-1);
    margin-bottom: 1.5rem;
    min-height: 1.6em;
}

.hero-tagline .prompt {
    color: var(--accent);
    margin-right: 0.3em;
}

.cursor {
    display: inline-block;
    color: var(--accent);
    animation: blink 1.1s steps(2, start) infinite;
    margin-left: 1px;
}

@keyframes blink {
    to { visibility: hidden; }
}

.hero-blurb {
    font-size: 15px;
    color: var(--fg-1);
    max-width: 50ch;
    line-height: 1.7;
    margin-bottom: 2rem;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5em;
    padding: 0.75em 1.4em;
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 14px;
    font-weight: 400;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.btn-primary {
    background: var(--accent);
    color: var(--bg-0);
    border-color: var(--accent);
}

.btn-primary:hover {
    background: transparent;
    color: var(--accent);
    box-shadow: 0 0 0 1px var(--accent), 0 0 20px var(--accent-glow);
}

.btn-ghost {
    background: transparent;
    color: var(--fg-1);
    border-color: var(--border-bright);
}

.btn-ghost:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.btn-large {
    padding: 1em 1.8em;
    font-size: 15px;
}

.hero-side {
    flex: 0 1 auto;
    animation: fadeUp 0.8s 0.2s ease both;
}

.ascii-box {
    font-family: var(--font-mono);
    font-size: 13px;
    line-height: 1.5;
    color: var(--fg-1);
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1rem 1.2rem;
    white-space: pre;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
}

.ascii-box .key {
    color: var(--accent);
}

.ascii-box .ab-border {
    color: var(--fg-3);
}

@keyframes fadeUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* =====================  SECTIONS  ===================== */
.section {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 5rem var(--gutter);
}

.section-head {
    margin-bottom: 2.5rem;
    border-bottom: 1px solid var(--border);
    padding-bottom: 1.2rem;
}

.section-prompt {
    display: block;
    color: var(--fg-2);
    font-size: 13px;
    margin-bottom: 0.4em;
}

.section-head h2 {
    font-family: var(--font-mono);
    font-size: clamp(1.5rem, 3vw, 2rem);
    font-weight: 500;
    color: var(--fg-0);
    letter-spacing: -0.01em;
}

.section-sub {
    color: var(--fg-2);
    font-size: 14px;
    margin-bottom: 2rem;
    margin-top: -1.5rem;
    max-width: 65ch;
}

/* =====================  ABOUT  ===================== */
.about-grid {
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 3rem;
    align-items: start;
}

.about-text p {
    color: var(--fg-1);
    margin-bottom: 1.2em;
    font-size: 15px;
    line-height: 1.8;
    max-width: 60ch;
}

.about-card {
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: 6px;
    overflow: hidden;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    position: sticky;
    top: 100px;
}

.card-header {
    display: flex;
    align-items: center;
    gap: 0.5em;
    padding: 0.7em 1em;
    background: var(--bg-3);
    border-bottom: 1px solid var(--border);
}

.dot {
    width: 11px;
    height: 11px;
    border-radius: 50%;
}

.dot-r { background: #ff5f56; }
.dot-y { background: #ffbd2e; }
.dot-g { background: #27c93f; }

.card-title {
    margin-left: 0.8em;
    color: var(--fg-2);
    font-size: 12px;
}

.card-body {
    padding: 1.2rem 1.4rem;
    font-size: 13px;
    line-height: 1.7;
    color: var(--fg-1);
    white-space: pre;
    overflow-x: auto;
}

/* =====================  TIMELINE  ===================== */
.timeline {
    list-style: none;
    position: relative;
    padding-left: 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 7px;
    top: 14px;
    bottom: 14px;
    width: 1px;
    background: linear-gradient(to bottom, var(--accent-dim), var(--border));
}

.tl-item {
    display: grid;
    grid-template-columns: 130px 1fr;
    gap: 1.5rem;
    margin-bottom: 3rem;
    position: relative;
}

.tl-marker {
    position: relative;
}

.tl-marker::before {
    content: '';
    position: absolute;
    left: 0;
    top: 6px;
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background: var(--bg-1);
    border: 2px solid var(--accent);
    box-shadow: 0 0 0 3px var(--bg-1), 0 0 12px var(--accent-glow);
}

.tl-hash {
    display: inline-block;
    margin-left: 30px;
    margin-top: 5px;
    font-size: 12px;
    color: var(--fg-3);
    background: var(--bg-2);
    padding: 0.2em 0.6em;
    border-radius: 3px;
    border: 1px solid var(--border);
}

.tl-meta {
    display: flex;
    flex-wrap: wrap;
    align-items: baseline;
    gap: 0.8em;
    margin-bottom: 0.7em;
}

.tl-meta h3 {
    font-family: var(--font-serif);
    font-size: 1.4rem;
    font-weight: 600;
    color: var(--fg-0);
    letter-spacing: -0.01em;
}

.tl-org {
    color: var(--accent);
    font-size: 14px;
}

.tl-date {
    color: var(--fg-2);
    font-size: 12px;
    margin-left: auto;
}

.tl-summary {
    color: var(--fg-1);
    margin-bottom: 0.8em;
    max-width: 60ch;
}

.tl-bullets {
    list-style: none;
    padding-left: 0;
}

.tl-bullets li {
    color: var(--fg-1);
    font-size: 14px;
    padding-left: 1.5em;
    position: relative;
    margin-bottom: 0.4em;
}

.tl-bullets li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--accent);
}

/* =====================  PROJECTS  ===================== */
.projects-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 2rem;
}

.project-card {
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 1.8rem;
    position: relative;
    transition: all 0.25s ease;
    overflow: hidden;
}

.project-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 2px;
    height: 100%;
    background: var(--accent-dim);
    transform: scaleY(0);
    transform-origin: bottom;
    transition: transform 0.3s ease;
}

.project-card:hover {
    border-color: var(--border-bright);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(0,0,0,0.4);
}

.project-card:hover::before {
    transform: scaleY(1);
    transform-origin: top;
}

.project-card-featured {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, var(--bg-2) 0%, var(--bg-3) 100%);
    border-color: var(--accent-dim);
    display: grid;
    grid-template-columns: 1.4fr 1fr;
    gap: 2rem;
    align-items: start;
}

.project-card-featured::before {
    transform: scaleY(1);
    background: var(--accent);
}

.project-card-featured .project-featured-main {
    /* main content area in featured card */
}

.project-card-featured .project-featured-side {
    border-left: 1px solid var(--border);
    padding-left: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.project-stat {
    display: flex;
    flex-direction: column;
    gap: 0.25em;
}

.stat-num {
    font-family: var(--font-serif);
    font-size: 2.2rem;
    font-weight: 600;
    color: var(--accent);
    line-height: 1;
    letter-spacing: -0.02em;
    font-style: italic;
}

.stat-plus {
    font-size: 1.4rem;
    color: var(--accent-dim);
}

.stat-label {
    font-size: 12px;
    color: var(--fg-2);
    text-transform: uppercase;
    letter-spacing: 0.08em;
}

.project-capability {
    font-size: 14px;
    color: var(--fg-1);
    line-height: 1.5;
    display: flex;
    align-items: baseline;
    gap: 0.5em;
}

.cap-bullet {
    color: var(--accent);
    font-size: 11px;
}

.project-tag {
    display: inline-block;
    font-size: 11px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent);
    background: var(--accent-glow);
    padding: 0.3em 0.7em;
    border-radius: 3px;
    margin-bottom: 1rem;
}

.project-title {
    font-family: var(--font-serif);
    font-size: 1.8rem;
    font-weight: 600;
    color: var(--fg-0);
    margin-bottom: 0.3em;
    letter-spacing: -0.01em;
}

.project-sub {
    color: var(--fg-2);
    font-size: 13px;
    margin-bottom: 1rem;
}

.project-desc {
    color: var(--fg-1);
    font-size: 14px;
    line-height: 1.7;
    margin-bottom: 1.2rem;
}

.project-stack {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 0.4em;
    margin-bottom: 1.2rem;
}

.project-stack li {
    font-size: 11px;
    color: var(--fg-1);
    background: var(--bg-1);
    padding: 0.35em 0.7em;
    border-radius: 3px;
    border: 1px solid var(--border);
}

.project-meta {
    display: flex;
    align-items: baseline;
    gap: 0.8em;
    font-size: 12px;
    padding-top: 1rem;
    border-top: 1px solid var(--border);
    color: var(--fg-2);
}

.project-meta-key {
    color: var(--accent);
}

.projects-footer {
    color: var(--fg-2);
    font-size: 14px;
    margin-top: 1rem;
    padding-top: 1.5rem;
    border-top: 1px dashed var(--border);
    text-align: center;
}

/* =====================  SKILLS  ===================== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
}

.skill-block {
    background: var(--bg-2);
    border: 1px solid var(--border);
    border-radius: 4px;
    padding: 1.3rem 1.5rem;
    transition: border-color 0.2s ease;
}

.skill-block:hover {
    border-color: var(--accent-dim);
}

.skill-cat {
    font-size: 12px;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.12em;
    margin-bottom: 1rem;
    padding-bottom: 0.6rem;
    border-bottom: 1px solid var(--border);
}

.skill-block ul {
    list-style: none;
}

.skill-block li {
    color: var(--fg-1);
    font-size: 13px;
    padding: 0.25em 0;
}

.dim {
    color: var(--fg-3);
    font-size: 11px;
}

/* =====================  ACHIEVEMENTS  ===================== */
.achievements {
    list-style: none;
}

.ach-item {
    display: grid;
    grid-template-columns: 80px 1fr;
    gap: 1.5rem;
    align-items: start;
    padding: 1.8rem 0;
    border-bottom: 1px solid var(--border);
    transition: padding-left 0.2s ease;
}

.ach-item:hover {
    padding-left: 1rem;
}

.ach-item:last-child {
    border-bottom: none;
}

.ach-num {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-weight: 600;
    color: var(--accent);
    line-height: 1;
    font-style: italic;
}

.ach-item h4 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--fg-0);
    margin-bottom: 0.4em;
    letter-spacing: -0.01em;
}

.ach-item p {
    color: var(--fg-1);
    font-size: 14px;
    line-height: 1.7;
    max-width: 65ch;
}

/* =====================  CONTACT  ===================== */
.section-contact {
    padding-bottom: 6rem;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 3rem;
    align-items: start;
}

.contact-lead {
    font-family: var(--font-serif);
    font-size: clamp(1.4rem, 2.5vw, 1.8rem);
    color: var(--fg-0);
    line-height: 1.4;
    margin-bottom: 1rem;
    max-width: 22ch;
    letter-spacing: -0.01em;
}

.contact-sub {
    color: var(--fg-1);
    font-size: 14px;
    margin-bottom: 2rem;
    max-width: 35ch;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 0;
    border: 1px solid var(--border);
    border-radius: 6px;
    overflow: hidden;
    background: var(--bg-2);
}

.contact-link {
    display: grid;
    grid-template-columns: 110px 1fr;
    align-items: center;
    padding: 1em 1.2em;
    border-bottom: 1px solid var(--border);
    color: var(--fg-1);
    font-size: 13px;
    transition: background 0.15s ease, color 0.15s ease;
}

.contact-link:last-child {
    border-bottom: none;
}

.contact-link:hover {
    background: var(--bg-3);
    color: var(--accent);
}

.cl-key {
    color: var(--accent);
    font-size: 12px;
    text-transform: uppercase;
    letter-spacing: 0.1em;
}

.contact-link:hover .cl-key {
    color: var(--fg-0);
}

.cl-val {
    color: var(--fg-1);
}

.contact-link:hover .cl-val {
    color: var(--accent);
}

/* =====================  FOOTER  ===================== */
.footer {
    border-top: 1px solid var(--border);
    padding: 2rem var(--gutter);
    margin-top: 2rem;
}

.footer-inner {
    max-width: var(--max-w);
    margin: 0 auto;
    display: flex;
    flex-wrap: wrap;
    align-items: center;
    gap: 0.8em;
    font-size: 12px;
    color: var(--fg-2);
}

.footer-sep {
    color: var(--fg-3);
}

.footer a {
    color: var(--fg-1);
}

.footer a:hover {
    color: var(--accent);
}

/* =====================  RESPONSIVE  ===================== */
@media (max-width: 880px) {
    .nav-links {
        display: none;
    }

    .nav {
        padding: 0.85rem 1.2rem;
    }

    .nav-logo {
        font-size: 13px;
    }

    .hero {
        flex-direction: column;
        align-items: flex-start;
        padding-top: 7rem;
        padding-bottom: 3rem;
        gap: 2rem;
        min-height: auto;
    }

    .hero-name {
        font-size: clamp(2.5rem, 10vw, 4rem);
    }

    .hero-side {
        width: 100%;
        overflow-x: auto;
        -webkit-overflow-scrolling: touch;
    }

    .ascii-box {
        font-size: 12px;
        min-width: max-content;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .about-card {
        position: relative;
        top: 0;
    }

    .card-body {
        font-size: 12px;
    }

    .tl-item {
        grid-template-columns: 1fr;
        gap: 0.5rem;
        padding-left: 30px;
    }

    .timeline::before {
        left: 7px;
    }

    .tl-marker::before {
        left: -25px;
    }

    .tl-hash {
        margin-left: 0;
    }

    .tl-date {
        margin-left: 0;
        font-size: 11px;
    }

    .tl-meta h3 {
        font-size: 1.2rem;
    }

    .project-card-featured {
        grid-column: span 1;
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .project-card-featured .project-featured-side {
        border-left: none;
        border-top: 1px solid var(--border);
        padding-left: 0;
        padding-top: 1.5rem;
        flex-direction: row;
        flex-wrap: wrap;
        gap: 1.5rem 2.5rem;
    }

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

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .ach-item {
        grid-template-columns: 50px 1fr;
        gap: 1rem;
    }

    .ach-num {
        font-size: 1.8rem;
    }
}

@media (max-width: 480px) {
    .nav {
        padding: 0.8rem 1rem;
    }

    .nav-resume {
        font-size: 12px;
        padding: 0.4em 0.8em;
    }

    .hero {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .ascii-box {
        font-size: 11px;
    }
}

/* Respect reduced motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
    .cursor { animation: none; }
}

/* =====================  SCROLL FADE-IN  =====================
   Only active when JS adds .js-scroll-fade to body. This way,
   if JS is disabled or broken, all content remains visible. */
.js-scroll-fade .section {
    opacity: 0;
    transform: translateY(15px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}
.js-scroll-fade .section.is-visible {
    opacity: 1;
    transform: translateY(0);
}
@media (prefers-reduced-motion: reduce) {
    .js-scroll-fade .section {
        opacity: 1;
        transform: none;
    }
}