/* =========================================
   Plus Jakarta Sans — Minimalist Portfolio
   ========================================= */

@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@300;400;500;600;700&display=swap');

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

/* Design Tokens */
:root {
    --bg:              #F9F9F9;
    --surface:         #FFFFFF;
    --text-primary:    #0D0D0D;
    --text-secondary:  #474747;
    --text-muted:      #9B9B9B;
    --border:          #E8E8E8;
    --max-w:           680px;
    --nav-h:           60px;
}

/* Base */
html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Plus Jakarta Sans', sans-serif;
    background: var(--bg);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
}

/* =========================================
   Navigation
   ========================================= */

.navbar {
    position: sticky;
    top: 0;
    background: rgba(249, 249, 249, 0.88);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--border);
    z-index: 100;
}

.navbar-inner {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 0 2rem;
    height: var(--nav-h);
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 2rem;
}

.nav-brand {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.01em;
}

.nav-links {
    display: flex;
    gap: 2rem;
    list-style: none;
}

.nav-link {
    font-size: 0.875rem;
    font-weight: 400;
    color: var(--text-muted);
    text-decoration: none;
    transition: color 0.15s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--text-primary);
}

/* =========================================
   Home — Hero
   ========================================= */

.hero {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 5.5rem 2rem 7rem;
}

.hero-avatar {
    width: 150px;
    height: 150px;
    border-radius: 10px;
    overflow: hidden;
    border: 1px solid var(--border);
    margin-bottom: 2.5rem;
}

.hero-avatar img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-role {
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.hero-name {
    font-size: 2.625rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    color: var(--text-primary);
    margin-bottom: 2.25rem;
}

.hero-bio {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.8;
    max-width: 560px;
}

.hero-bio + .hero-bio {
    margin-top: 1.25rem;
}

.hero-bio strong {
    color: var(--text-primary);
    font-weight: 600;
}

/* =========================================
   Projects Page
   ========================================= */

.projects {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 5.5rem 2rem 7rem;
}

.page-eyebrow {
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: 0.09em;
    text-transform: uppercase;
    color: var(--text-muted);
    margin-bottom: 0.75rem;
}

.page-title {
    font-size: 2.625rem;
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    color: var(--text-primary);
    margin-bottom: 1.25rem;
}

.page-subtitle {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 480px;
    margin-bottom: 4.5rem;
}

/* Project List */
.project-list {
    list-style: none;
}

.project-item {
    padding: 2.5rem 0;
    border-top: 1px solid var(--border);
}

.project-item:last-child {
    border-bottom: 1px solid var(--border);
}

.project-num {
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: 0.07em;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
    font-variant-numeric: tabular-nums;
}

.project-title {
    font-size: 1.25rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    color: var(--text-primary);
    line-height: 1.3;
    margin-bottom: 0.625rem;
}

.project-link {
    color: inherit;
    text-decoration: none;
    border-bottom: 1px solid var(--border);
    transition: border-color 0.15s ease;
}

.project-link:hover {
    border-bottom-color: var(--text-primary);
}

.project-description {
    font-size: 0.9375rem;
    color: var(--text-secondary);
    line-height: 1.7;
    max-width: 520px;
    margin-bottom: 1.125rem;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
}

.tag {
    font-size: 0.6875rem;
    font-weight: 500;
    letter-spacing: 0.04em;
    text-transform: uppercase;
    color: var(--text-muted);
    padding: 0.2rem 0.55rem;
    border: 1px solid var(--border);
    border-radius: 4px;
    background: var(--surface);
}

/* =========================================
   Footer
   ========================================= */

.footer {
    border-top: 1px solid var(--border);
    background: var(--bg);
}

.footer-inner {
    max-width: var(--max-w);
    margin: 0 auto;
    padding: 1.5rem 2rem;
}

.footer-inner p {
    font-size: 0.8125rem;
    color: var(--text-muted);
}

/* =========================================
   Responsive
   ========================================= */

/* Tablet - Large Mobile (641px - 1024px) */
@media (max-width: 1024px) {
    :root {
        --max-w: 600px;
        --nav-h: 56px;
    }

    .hero-name,
    .page-title {
        font-size: 2.25rem;
    }

    .hero,
    .projects {
        padding: 4.5rem 1.75rem 6rem;
    }

    .navbar-inner {
        padding: 0 1.75rem;
        gap: 1.5rem;
    }

    .nav-links {
        gap: 1.5rem;
    }

    .hero-avatar {
        width: 120px;
        height: 120px;
    }
}

/* Mobile (640px and below) */
@media (max-width: 640px) {
    :root {
        --max-w: 100%;
        --nav-h: 56px;
    }

    .hero-name,
    .page-title {
        font-size: 1.75rem;
    }

    .page-subtitle {
        font-size: 0.875rem;
    }

    .hero,
    .projects {
        padding: 3.5rem 1rem 5rem;
    }

    .navbar-inner {
        padding: 0 1rem;
        gap: 1rem;
        flex-wrap: wrap;
        justify-content: center;
        height: auto;
        min-height: var(--nav-h);
    }

    .nav-brand {
        flex-basis: 100%;
        text-align: center;
        margin-bottom: 0.5rem;
    }

    .nav-links {
        gap: 1.25rem;
    }

    .nav-link {
        font-size: 0.8125rem;
    }

    .hero-avatar {
        width: 100px;
        height: 100px;
        margin-bottom: 2rem;
    }

    .hero-role {
        font-size: 0.625rem;
        margin-bottom: 0.5rem;
    }

    .hero-bio {
        font-size: 0.875rem;
        line-height: 1.6;
    }

    .hero-bio + .hero-bio {
        margin-top: 1rem;
    }

    .page-eyebrow {
        font-size: 0.625rem;
    }

    .project-item {
        padding: 1.75rem 0;
    }

    .project-title {
        font-size: 1.125rem;
    }

    .project-description {
        font-size: 0.875rem;
        max-width: 100%;
    }

    .tag {
        font-size: 0.625rem;
        padding: 0.15rem 0.45rem;
    }

    .footer-inner {
        padding: 1rem 1rem;
    }

    .footer-inner p {
        font-size: 0.75rem;
    }
}

/* Small Mobile (480px and below) */
@media (max-width: 480px) {
    :root {
        --max-w: 100%;
    }

    .hero-name,
    .page-title {
        font-size: 1.5rem;
        margin-bottom: 1.75rem;
    }

    .hero,
    .projects {
        padding: 3rem 0.75rem 4rem;
    }

    .navbar-inner {
        padding: 0 0.75rem;
    }

    .navbar {
        position: relative;
    }

    .hero-avatar {
        width: 80px;
        height: 80px;
        margin-bottom: 1.75rem;
    }

    .nav-links {
        gap: 1rem;
    }

    .nav-link {
        font-size: 0.75rem;
    }

    .project-item {
        padding: 1.5rem 0;
    }

    .project-num {
        font-size: 0.625rem;
    }

    .project-title {
        font-size: 1rem;
        margin-bottom: 0.5rem;
    }
}