```css
/* =========================================================
   SALU BARSHAD — PORTFOLIO
   Modern Premium Portfolio
   ========================================================= */


/* =========================================================
   01. DESIGN TOKENS
   ========================================================= */

:root {
    --bg: #151a21;
    --bg-soft: #1b2129;
    --surface: #202730;
    --surface-hover: #252e38;

    --text: #f1f3f5;
    --text-soft: #aab3be;
    --text-muted: #707b88;

    --border: rgba(255, 255, 255, 0.09);
    --border-strong: rgba(255, 255, 255, 0.15);

    --accent: #79a9ff;
    --accent-soft: rgba(121, 169, 255, 0.12);
    --accent-glow: rgba(121, 169, 255, 0.22);

    --success: #7fd1a1;

    --max-width: 1240px;

    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 22px;

    --transition: 220ms ease;
}


/* =========================================================
   02. LIGHT MODE
   ========================================================= */

body.light-mode {
    --bg: #f3f5f7;
    --bg-soft: #ffffff;
    --surface: #ffffff;
    --surface-hover: #f7f9fb;

    --text: #17202a;
    --text-soft: #53606d;
    --text-muted: #7a8692;

    --border: rgba(23, 32, 42, 0.10);
    --border-strong: rgba(23, 32, 42, 0.16);

    --accent: #356fdb;
    --accent-soft: rgba(53, 111, 219, 0.09);
    --accent-glow: rgba(53, 111, 219, 0.16);

    --success: #258653;
}


/* =========================================================
   03. RESET
   ========================================================= */

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: 100px;
}

body {
    min-height: 100vh;

    background:
        radial-gradient(
            circle at 80% 0%,
            rgba(121, 169, 255, 0.06),
            transparent 30%
        ),
        var(--bg);

    color: var(--text);

    font-family:
        Inter,
        ui-sans-serif,
        -apple-system,
        BlinkMacSystemFont,
        "Segoe UI",
        sans-serif;

    line-height: 1.6;

    -webkit-font-smoothing: antialiased;
    text-rendering: optimizeLegibility;

    transition:
        background-color 300ms ease,
        color 300ms ease;
}

body.light-mode {
    background:
        radial-gradient(
            circle at 80% 0%,
            rgba(53, 111, 219, 0.06),
            transparent 30%
        ),
        var(--bg);
}

a {
    color: inherit;
    text-decoration: none;
}

button {
    font: inherit;
}

::selection {
    background: var(--accent);
    color: #ffffff;
}


/* =========================================================
   04. GLOBAL CONTAINER
   ========================================================= */

header,
main,
footer {
    width: min(
        calc(100% - 64px),
        var(--max-width)
    );

    margin-inline: auto;
}


/* =========================================================
   05. HEADER / NAVIGATION
   ========================================================= */

header {
    position: sticky;
    top: 18px;
    z-index: 1000;

    margin-top: 18px;
}

nav {
    min-height: 68px;

    display: flex;
    align-items: center;
    justify-content: space-between;

    padding: 0 18px 0 22px;

    background: rgba(27, 33, 41, 0.76);
    border: 1px solid var(--border);

    border-radius: 14px;

    backdrop-filter: blur(18px);
    -webkit-backdrop-filter: blur(18px);

    box-shadow:
        0 10px 35px rgba(0, 0, 0, 0.16);

    transition:
        background 300ms ease,
        border-color 300ms ease;
}

.light-mode nav {
    background: rgba(255, 255, 255, 0.78);

    box-shadow:
        0 10px 35px rgba(23, 32, 42, 0.08);
}

.logo {
    font-size: 0.78rem;
    font-weight: 800;
    letter-spacing: 0.14em;

    white-space: nowrap;

    transition: color var(--transition);
}

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

.nav-links {
    display: flex;
    align-items: center;
    gap: 30px;

    margin-left: auto;
    margin-right: 42px;
}

.nav-links a,
.nav-socials a {
    position: relative;

    color: var(--text-soft);

    font-size: 0.78rem;
    font-weight: 500;
    letter-spacing: 0.03em;

    transition:
        color var(--transition);
}

.nav-links a::after,
.nav-socials a::after {
    content: "";

    position: absolute;
    left: 0;
    bottom: -5px;

    width: 100%;
    height: 1px;

    background: var(--accent);

    transform: scaleX(0);
    transform-origin: right;

    transition: transform var(--transition);
}

.nav-links a:hover,
.nav-socials a:hover {
    color: var(--text);
}

.nav-links a:hover::after,
.nav-socials a:hover::after {
    transform: scaleX(1);
    transform-origin: left;
}

.nav-right {
    display: flex;
    align-items: center;
    gap: 20px;
}

.nav-socials {
    display: flex;
    align-items: center;
    gap: 18px;
}

.theme-toggle {
    width: 38px;
    height: 38px;

    display: grid;
    place-items: center;

    border: 1px solid var(--border);
    border-radius: 50%;

    background: var(--surface);

    color: var(--text-soft);

    cursor: pointer;

    transition:
        color var(--transition),
        background var(--transition),
        border-color var(--transition),
        transform var(--transition);
}

.theme-toggle:hover {
    color: var(--accent);

    border-color: var(--border-strong);

    background: var(--surface-hover);

    transform: rotate(15deg);
}

.theme-icon {
    font-size: 1rem;
    line-height: 1;
}


/* =========================================================
   06. HERO
   ========================================================= */

#hero {
    min-height: calc(100vh - 110px);

    display: flex;
    flex-direction: column;
    justify-content: center;

    padding:
        100px
        0
        70px;

    position: relative;
}

.hero-content {
    max-width: 960px;
}

.eyebrow,
.contact-eyebrow {
    margin-bottom: 25px;

    color: var(--accent);

    font-size: 0.68rem;
    font-weight: 700;

    letter-spacing: 0.16em;
    line-height: 1.5;
}

.hero-content h1 {
    max-width: 950px;

    font-size: clamp(
        3.8rem,
        8vw,
        7.5rem
    );

    line-height: 0.94;

    letter-spacing: -0.065em;

    font-weight: 700;
}

.hero-content h1 span,
.section h2 span,
.contact-content h2 span {
    color: var(--text-muted);
}

.hero-description {
    max-width: 650px;

    margin-top: 38px;

    color: var(--text-soft);

    font-size: 1.05rem;
    line-height: 1.8;
}

.hero-actions {
    display: flex;
    align-items: center;
    gap: 12px;

    margin-top: 38px;
}

.button {
    min-height: 48px;

    display: inline-flex;
    align-items: center;
    justify-content: center;

    padding: 0 22px;

    border-radius: 9px;

    font-size: 0.78rem;
    font-weight: 650;

    letter-spacing: 0.03em;

    transition:
        transform var(--transition),
        background var(--transition),
        border-color var(--transition),
        color var(--transition);
}

.button:hover {
    transform: translateY(-2px);
}

.button-primary {
    background: var(--text);
    color: var(--bg);

    border: 1px solid var(--text);
}

.button-primary:hover {
    background: var(--accent);
    border-color: var(--accent);
    color: #ffffff;
}

.button-secondary {
    background: transparent;

    border: 1px solid var(--border-strong);

    color: var(--text-soft);
}

.button-secondary:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.hero-meta {
    display: flex;
    justify-content: space-between;

    margin-top: 90px;

    padding-top: 20px;

    border-top: 1px solid var(--border);

    color: var(--text-muted);

    font-size: 0.62rem;
    font-weight: 600;

    letter-spacing: 0.14em;
}


/* =========================================================
   07. SECTIONS
   ========================================================= */

.section {
    padding: 150px 0;

    border-top: 1px solid var(--border);
}

.section-label {
    display: flex;
    align-items: center;
    gap: 15px;

    margin-bottom: 65px;

    color: var(--text-muted);

    font-size: 0.64rem;
    font-weight: 700;

    letter-spacing: 0.14em;
}

.section-label span:first-child {
    color: var(--accent);
}

.section-label span:last-child {
    position: relative;
}

.section-label span:last-child::before {
    content: "";

    position: absolute;

    left: -10px;
    top: 50%;

    width: 3px;
    height: 3px;

    border-radius: 50%;

    background: var(--text-muted);

    transform: translateY(-50%);
}


/* =========================================================
   08. ABOUT
   ========================================================= */

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 100px;
}

.section h2 {
    font-size: clamp(
        3rem,
        5vw,
        5.4rem
    );

    line-height: 0.98;

    letter-spacing: -0.055em;

    font-weight: 650;
}

.about-text {
    max-width: 540px;

    padding-top: 8px;
}

.about-text p {
    margin-bottom: 25px;

    color: var(--text-soft);

    font-size: 1rem;
    line-height: 1.85;
}

.about-text p:last-child {
    margin-bottom: 0;
}


/* =========================================================
   09. PROJECTS
   ========================================================= */

.section-heading {
    margin-bottom: 70px;
}

.projects-list {
    border-top: 1px solid var(--border);
}

.project-card {
    display: grid;

    grid-template-columns: 90px 1fr;

    padding: 38px 0;

    border-bottom: 1px solid var(--border);

    transition:
        padding-left 300ms ease,
        background 300ms ease;
}

.project-card:hover {
    padding-left: 18px;
}

.project-number {
    padding-top: 5px;

    color: var(--text-muted);

    font-size: 0.65rem;
    font-weight: 700;

    letter-spacing: 0.1em;
}

.project-main {
    min-width: 0;
}

.project-header {
    display: flex;
    align-items: center;
    justify-content: space-between;

    gap: 30px;
}

.project-header h3 {
    font-size: clamp(
        1.4rem,
        2vw,
        2rem
    );

    line-height: 1.2;

    font-weight: 600;

    letter-spacing: -0.025em;
}

.project-link {
    color: var(--text-muted);

    font-size: 0.7rem;
    font-weight: 600;

    white-space: nowrap;

    transition: color var(--transition);
}

.project-link:hover {
    color: var(--accent);
}

.project-main > p {
    max-width: 700px;

    margin-top: 15px;

    color: var(--text-soft);

    font-size: 0.93rem;
    line-height: 1.75;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;

    margin-top: 22px;
}

.project-tags span {
    padding: 5px 9px;

    border: 1px solid var(--border);

    border-radius: 5px;

    color: var(--text-muted);

    background: var(--accent-soft);

    font-size: 0.61rem;
    font-weight: 600;

    letter-spacing: 0.04em;
}

.project-status {
    flex-shrink: 0;

    padding: 5px 9px;

    border: 1px solid rgba(127, 209, 161, 0.25);

    border-radius: 5px;

    color: var(--success);

    background: rgba(127, 209, 161, 0.07);

    font-size: 0.6rem;
    font-weight: 700;

    letter-spacing: 0.07em;
    text-transform: uppercase;
}


/* =========================================================
   10. SKILLS
   ========================================================= */

.skills-grid {
    display: grid;

    grid-template-columns:
        repeat(2, 1fr);

    border-top: 1px solid var(--border);
}

.skill-group {
    min-height: 300px;

    padding: 38px 40px 42px 0;

    border-bottom: 1px solid var(--border);
}

.skill-group:nth-child(odd) {
    padding-right: 70px;

    border-right: 1px solid var(--border);
}

.skill-group:nth-child(even) {
    padding-left: 70px;
}

.skill-index {
    display: block;

    margin-bottom: 35px;

    color: var(--accent);

    font-size: 0.65rem;
    font-weight: 700;

    letter-spacing: 0.1em;
}

.skill-group h3 {
    margin-bottom: 25px;

    font-size: clamp(
        1.7rem,
        3vw,
        2.5rem
    );

    line-height: 1.02;

    letter-spacing: -0.04em;

    font-weight: 600;
}

.skill-group p {
    max-width: 450px;

    margin-top: 10px;

    color: var(--text-soft);

    font-size: 0.82rem;
    line-height: 1.7;
}


/* =========================================================
   11. CONTACT
   ========================================================= */

.contact-section {
    padding-bottom: 180px;
}

.contact-content {
    max-width: 900px;
}

.contact-content h2 {
    font-size: clamp(
        3.4rem,
        7vw,
        6.8rem
    );

    line-height: 0.95;

    letter-spacing: -0.065em;

    font-weight: 650;
}

.contact-description {
    max-width: 500px;

    margin-top: 35px;

    color: var(--text-soft);

    font-size: 1rem;
}

.contact-links {
    display: flex;
    flex-wrap: wrap;
    gap: 30px;

    margin-top: 42px;
}

.contact-links a {
    position: relative;

    padding-bottom: 5px;

    color: var(--text);

    font-size: 0.78rem;
    font-weight: 650;

    border-bottom: 1px solid var(--border-strong);

    transition:
        color var(--transition),
        border-color var(--transition);
}

.contact-links a:hover {
    color: var(--accent);

    border-color: var(--accent);
}


/* =========================================================
   12. FOOTER
   ========================================================= */

footer {
    display: flex;
    align-items: center;
    justify-content: space-between;

    padding: 28px 0 35px;

    border-top: 1px solid var(--border);

    color: var(--text-muted);

    font-size: 0.6rem;
    font-weight: 650;

    letter-spacing: 0.12em;
}

.footer-right {
    display: flex;
    gap: 25px;
}


/* =========================================================
   13. FOCUS STATES
   ========================================================= */

a:focus-visible,
button:focus-visible {
    outline: 2px solid var(--accent);
    outline-offset: 4px;
}


/* =========================================================
   14. RESPONSIVE — TABLET
   ========================================================= */

@media (max-width: 900px) {

    header,
    main,
    footer {
        width: min(
            calc(100% - 40px),
            var(--max-width)
        );
    }

    .nav-links {
        gap: 18px;
        margin-right: 25px;
    }

    .nav-socials {
        display: none;
    }

    #hero {
        min-height: auto;
        padding-top: 120px;
        padding-bottom: 80px;
    }

    .hero-content h1 {
        font-size: clamp(
            3.5rem,
            10vw,
            6rem
        );
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 55px;
    }

    .about-text {
        max-width: 680px;
    }

    .section {
        padding: 110px 0;
    }

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

    .skill-group,
    .skill-group:nth-child(odd),
    .skill-group:nth-child(even) {
        padding: 35px 0;

        border-right: none;
    }
}


/* =========================================================
   15. RESPONSIVE — MOBILE
   ========================================================= */

@media (max-width: 640px) {

    header,
    main,
    footer {
        width: calc(100% - 28px);
    }

    header {
        top: 10px;
        margin-top: 10px;
    }

    nav {
        min-height: 60px;

        padding:
            0
            12px
            0
            16px;
    }

    .logo {
        font-size: 0.7rem;
    }

    .nav-links {
        display: none;
    }

    .nav-right {
        margin-left: auto;
    }

    .theme-toggle {
        width: 34px;
        height: 34px;
    }

    #hero {
        padding-top: 100px;
        padding-bottom: 65px;
    }

    .eyebrow {
        max-width: 320px;

        font-size: 0.6rem;
        line-height: 1.8;
    }

    .hero-content h1 {
        font-size: clamp(
            3.1rem,
            15vw,
            5rem
        );

        letter-spacing: -0.07em;
    }

    .hero-description {
        margin-top: 28px;

        font-size: 0.92rem;
        line-height: 1.75;
    }

    .hero-actions {
        flex-direction: column;
        align-items: stretch;

        max-width: 230px;
    }

    .button {
        width: 100%;
    }

    .hero-meta {
        flex-direction: column;
        gap: 10px;

        margin-top: 60px;
    }

    .section {
        padding: 90px 0;
    }

    .section-label {
        margin-bottom: 45px;
    }

    .section h2 {
        font-size: clamp(
            2.8rem,
            13vw,
            4rem
        );
    }

    .project-card {
        grid-template-columns: 1fr;

        gap: 18px;

        padding: 30px 0;
    }

    .project-card:hover {
        padding-left: 0;
    }

    .project-header {
        align-items: flex-start;
        flex-direction: column;

        gap: 12px;
    }

    .project-header h3 {
        font-size: 1.35rem;
    }

    .project-main > p {
        font-size: 0.86rem;
    }

    .project-number {
        padding-top: 0;
    }

    .skill-group {
        min-height: auto;

        padding: 32px 0 !important;
    }

    .skill-index {
        margin-bottom: 24px;
    }

    .skill-group h3 {
        font-size: 1.8rem;
    }

    .contact-section {
        padding-bottom: 110px;
    }

    .contact-content h2 {
        font-size: clamp(
            3rem,
            14vw,
            4.5rem
        );
    }

    .contact-description {
        font-size: 0.9rem;
    }

    .contact-links {
        flex-direction: column;
        align-items: flex-start;

        gap: 18px;
    }

    footer {
        flex-direction: column;
        align-items: flex-start;

        gap: 15px;
    }
}


/* =========================================================
   16. REDUCED MOTION
   ========================================================= */

@media (prefers-reduced-motion: reduce) {

    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}
```