/* =========================================================
   CSS Custom Properties — Dark Terminal Theme
   ========================================================= */
:root {
    --bg:           #0d1117;
    --surface:      #161b22;
    --surface-2:    #1c2128;
    --border:       #30363d;
    --text:         #e6edf3;
    --text-muted:   #8b949e;
    --accent:       #58a6ff;
    --accent-hover: #79b8ff;
    --green:        #3fb950;
    --yellow:       #d29922;
    --red:          #f85149;
    --font-mono:    'JetBrains Mono', 'Fira Code', 'Cascadia Code', monospace;
    --font-sans:    'Inter', system-ui, -apple-system, sans-serif;
    --radius:       6px;
    --nav-h:        60px;
    --transition:   0.2s ease;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: var(--nav-h);
}

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-sans);
    font-size: 16px;
    line-height: 1.7;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition);
}
a:hover { color: var(--accent-hover); }

img { max-width: 100%; display: block; }

/* =========================================================
   Utilities
   ========================================================= */
.container {
    width: min(1100px, 100% - 2rem);
    margin-inline: auto;
}

.prompt {
    color: var(--green);
    font-family: var(--font-mono);
    font-weight: 700;
    user-select: none;
}

.section-title {
    font-family: var(--font-mono);
    font-size: clamp(1.4rem, 3vw, 1.8rem);
    font-weight: 700;
    margin-bottom: 0.4rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.section-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
    margin-left: 1rem;
}

.section-subtitle {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 2.5rem;
}

/* =========================================================
   Navigation
   ========================================================= */
.nav {
    position: fixed;
    top: 0;
    width: 100%;
    height: var(--nav-h);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    background: rgba(13, 17, 23, 0.85);
}

.nav::before {
    content: '';
    position: absolute;
    inset: 0;
    background: rgba(13, 17, 23, 0.85);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    z-index: -1;
}

.nav__inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 100%;
    width: min(1100px, 100% - 2rem);
    margin-inline: auto;
}

.nav__logo {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    font-weight: 700;
    color: var(--text);
    display: flex;
    align-items: center;
    gap: 0.4rem;
}
.nav__logo:hover { color: var(--accent); }

.nav__links {
    list-style: none;
    display: flex;
    gap: 1.5rem;
}

.nav__links a {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--text-muted);
    transition: color var(--transition);
}
.nav__links a:hover { color: var(--accent); }
.nav__links a .prompt { margin-right: 0; }

.nav__toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}
.nav__toggle span {
    display: block;
    width: 22px;
    height: 2px;
    background: var(--text);
    border-radius: 2px;
    transition: var(--transition);
}

/* =========================================================
   Hero Section
   ========================================================= */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--nav-h);
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 60% 50% at 70% 40%, rgba(88, 166, 255, 0.06) 0%, transparent 70%),
        radial-gradient(ellipse 40% 40% at 20% 70%, rgba(63, 185, 80, 0.04) 0%, transparent 60%);
    pointer-events: none;
}

.hero__inner {
    display: grid;
    grid-template-columns: 1fr auto;
    align-items: center;
    gap: 3rem;
    width: min(1100px, 100% - 2rem);
    margin-inline: auto;
    padding-block: 4rem;
}

.hero__tag {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    color: var(--green);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}
.hero__tag::before { content: '//'; color: var(--text-muted); }

.hero__name {
    font-family: var(--font-mono);
    font-size: clamp(2.4rem, 5vw, 3.8rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 0.5rem;
    color: var(--text);
}

.hero__title {
    font-family: var(--font-mono);
    font-size: clamp(1rem, 2.5vw, 1.4rem);
    color: var(--accent);
    margin-bottom: 1.5rem;
    min-height: 1.8em;
}

.hero__bio {
    font-size: 1rem;
    color: var(--text-muted);
    max-width: 520px;
    margin-bottom: 2.5rem;
    line-height: 1.8;
}

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

.btn {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    padding: 0.6rem 1.2rem;
    border-radius: var(--radius);
    border: 1px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    display: inline-flex;
    align-items: center;
    gap: 0.4rem;
    text-decoration: none;
}

.btn--primary {
    background: var(--accent);
    color: var(--bg);
    border-color: var(--accent);
    font-weight: 700;
}
.btn--primary:hover {
    background: var(--accent-hover);
    border-color: var(--accent-hover);
    color: var(--bg);
    transform: translateY(-1px);
}

.btn--outline {
    background: transparent;
    color: var(--text);
    border-color: var(--border);
}
.btn--outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-1px);
}

.hero__avatar {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    border: 2px solid var(--border);
    object-fit: cover;
    object-position: center top;
    flex-shrink: 0;
    transition: border-color var(--transition);
}
.hero__avatar:hover { border-color: var(--accent); }

.hero__avatar-placeholder {
    width: 200px;
    height: 200px;
    border-radius: 50%;
    border: 2px solid var(--border);
    background: var(--surface);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 4rem;
    color: var(--text-muted);
    flex-shrink: 0;
}

/* =========================================================
   Section Shared
   ========================================================= */
.section {
    padding-block: 5rem;
}

.section--alt {
    background: var(--surface);
}

/* =========================================================
   Projects Section
   ========================================================= */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.25rem;
}

.project-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    transition: border-color var(--transition), transform var(--transition);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}
.project-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.project-card__header {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 0.5rem;
}

.project-card__icon {
    font-size: 1.3rem;
    color: var(--accent);
    font-family: var(--font-mono);
}

.project-card__links {
    display: flex;
    gap: 0.75rem;
}
.project-card__links a {
    color: var(--text-muted);
    font-size: 0.8rem;
    font-family: var(--font-mono);
}
.project-card__links a:hover { color: var(--accent); }

.project-card__name {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 700;
    color: var(--text);
}

.project-card__desc {
    font-size: 0.875rem;
    color: var(--text-muted);
    line-height: 1.6;
    flex: 1;
}

.project-card__tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: auto;
}

.tag {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    padding: 0.2rem 0.5rem;
    background: rgba(88, 166, 255, 0.1);
    color: var(--accent);
    border-radius: 3px;
    border: 1px solid rgba(88, 166, 255, 0.2);
}

/* =========================================================
   Experience Cards
   ========================================================= */
.exp-stack {
    display: flex;
    flex-direction: column;
    gap: 0.6rem;
}

.exp-card {
    background: var(--bg);
    border: 1px solid var(--border);
    border-left: 3px solid var(--brand, var(--border));
    border-radius: var(--radius);
    overflow: hidden;
    transition: box-shadow var(--transition);
}
.exp-card:hover {
    box-shadow: 0 0 0 1px var(--brand);
}

.exp-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    width: 100%;
    padding: 1rem 1.25rem;
    background: none;
    border: none;
    cursor: pointer;
    color: inherit;
    text-align: left;
    transition: background var(--transition);
}
.exp-header:hover { background: rgba(255,255,255,0.02); }

.exp-logo-wrap {
    position: relative;
    width: 48px;
    height: 48px;
    flex-shrink: 0;
    border-radius: 8px;
    border: 1px solid var(--border);
    overflow: hidden;
}

.exp-logo-init {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--brand);
    background: color-mix(in srgb, var(--brand) 12%, var(--surface));
}

.exp-logo {
    position: absolute;
    inset: 0;
    width: 100%;
    height: 100%;
    object-fit: contain;
    padding: 6px;
    background: #fff;
    border-radius: 7px;
    transition: opacity 0.2s;
}

.exp-meta {
    flex: 1;
    min-width: 0;
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.exp-role {
    font-family: var(--font-mono);
    font-size: 0.9rem;
    font-weight: 700;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.exp-company {
    font-size: 0.8rem;
    color: var(--text-muted);
}

.exp-period {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    color: var(--text-muted);
    white-space: nowrap;
    padding: 0.2rem 0.6rem;
    border: 1px solid var(--border);
    border-radius: 99px;
    flex-shrink: 0;
}
.exp-period--current {
    border-color: var(--green);
    color: var(--green);
    background: rgba(63, 185, 80, 0.1);
}

.exp-chevron {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
    color: var(--text-muted);
    transition: transform 0.25s ease, color var(--transition);
}
.exp-card--open .exp-chevron {
    transform: rotate(180deg);
    color: var(--brand);
}

.exp-body {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.35s ease;
}
.exp-card--open .exp-body {
    max-height: 800px;
}

.exp-list {
    list-style: none;
    padding: 1rem 1.25rem 1.25rem;
    border-top: 1px solid var(--border);
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.exp-list li {
    font-size: 0.875rem;
    color: var(--text-muted);
    padding-left: 1.2rem;
    position: relative;
    line-height: 1.65;
}

.exp-list li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--brand);
    font-size: 0.7rem;
    top: 0.25em;
}

.exp-list strong {
    color: var(--brand);
    font-weight: 600;
}


/* =========================================================
   Contact Section
   ========================================================= */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: start;
}

.contact-links {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.contact-link {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    padding: 1rem 1.25rem;
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    color: var(--text);
    font-family: var(--font-mono);
    font-size: 0.85rem;
    transition: all var(--transition);
}
.contact-link:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateX(4px);
}

.contact-link__icon {
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    flex-shrink: 0;
}

/* Contact Form */
.contact-form {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}

.form-group label {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
}

.form-group input,
.form-group textarea {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 0.65rem 0.9rem;
    color: var(--text);
    font-family: var(--font-sans);
    font-size: 0.9rem;
    transition: border-color var(--transition);
    outline: none;
    width: 100%;
}
.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent);
}
.form-group textarea {
    resize: vertical;
    min-height: 130px;
}

.form-message {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    padding: 0.6rem 0.9rem;
    border-radius: var(--radius);
    display: none;
}
.form-message.success {
    background: rgba(63, 185, 80, 0.1);
    color: var(--green);
    border: 1px solid rgba(63, 185, 80, 0.3);
    display: block;
}
.form-message.error {
    background: rgba(248, 81, 73, 0.1);
    color: var(--red);
    border: 1px solid rgba(248, 81, 73, 0.3);
    display: block;
}

/* =========================================================
   Recommendations Preview (homepage)
   ========================================================= */
.rec-preview-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
    margin-bottom: 2rem;
}

.rec-preview-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.5rem;
    margin: 0;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: border-color var(--transition);
}
.rec-preview-card:hover { border-color: var(--accent); }

.section-more {
    text-align: center;
    margin-top: 2rem;
}

.rec-preview-quote {
    font-size: 0.88rem;
    color: var(--text-muted);
    line-height: 1.7;
    font-style: italic;
    margin: 0;
    flex: 1;
}

.rec-preview-credit {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
}

.rec-preview-credit strong {
    font-size: 0.85rem;
    color: var(--accent);
    font-style: normal;
}

.rec-preview-credit span {
    font-size: 0.75rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    font-style: normal;
}

@media (max-width: 768px) {
    .rec-preview-grid { grid-template-columns: 1fr; }
}

/* =========================================================
   Footer
   ========================================================= */
.footer {
    border-top: 1px solid var(--border);
    padding-block: 2rem;
    text-align: center;
}

.footer__social {
    display: flex;
    justify-content: center;
    gap: 1.25rem;
    margin-bottom: 1rem;
}

.footer__social-link {
    color: var(--text-muted);
    transition: color var(--transition);
    display: flex;
    align-items: center;
}
.footer__social-link:hover { color: var(--accent); }

.footer__text {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

.footer__copy {
    font-size: 0.8rem;
    color: var(--text-muted);
}

/* =========================================================
   Blog Page
   ========================================================= */
.page-hero {
    padding-top: calc(var(--nav-h) + 3rem);
    padding-bottom: 2rem;
}

.post-card__expand {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent);
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
    margin-top: 0.5rem;
}
.post-card__expand:hover { color: var(--accent-hover); }


/* =========================================================
   Cursor blink
   ========================================================= */
.cursor {
    display: inline-block;
    width: 2px;
    height: 1.1em;
    background: var(--accent);
    vertical-align: text-bottom;
    animation: blink 1s step-end infinite;
    margin-left: 2px;
}

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

/* =========================================================
   Recommendations Page
   ========================================================= */
.rec-container {
    padding-block: 2rem 5rem;
}

/* Filter tabs */
.rec-filters {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 2rem;
}

.rec-filter {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 0.35rem 0.8rem;
    border: 1px solid var(--border);
    border-radius: var(--radius);
    background: none;
    color: var(--text-muted);
    cursor: pointer;
    transition: color var(--transition), border-color var(--transition), background var(--transition);
}
.rec-filter:hover,
.rec-filter--active {
    border-color: var(--accent);
    color: var(--accent);
    background: rgba(88, 166, 255, 0.08);
}

/* Cards grid */
.rec-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(340px, 1fr));
    gap: 1.25rem;
}

.recommendation-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-left: 3px solid var(--accent);
    border-radius: var(--radius);
    padding: 1.25rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    transition: border-color var(--transition), transform var(--transition);
}
.recommendation-card:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

/* Meta row */
.rec-meta {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 0.75rem;
}
.rec-meta__left {
    display: flex;
    flex-direction: column;
    gap: 0.2rem;
    min-width: 0;
}
.rec-name {
    font-size: 0.95rem;
    color: var(--text);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}
.rec-title {
    font-size: 0.75rem;
    color: var(--text-muted);
    line-height: 1.3;
}
.rec-meta__right {
    display: flex;
    flex-direction: column;
    align-items: flex-end;
    gap: 0.35rem;
    flex-shrink: 0;
}
.rec-date {
    font-family: var(--font-mono);
    font-size: 0.72rem;
    color: var(--text-muted);
}

/* Badges */
.badge {
    font-family: var(--font-mono);
    font-size: 0.65rem;
    padding: 0.2rem 0.5rem;
    border-radius: 99px;
    white-space: nowrap;
}
.badge--green  { background: rgba(63, 185, 80, 0.15);  color: var(--green); }
.badge--blue   { background: rgba(88, 166, 255, 0.15); color: var(--accent); }
.badge--muted  { background: rgba(139, 148, 158, 0.15); color: var(--text-muted); }

/* Quote */
.rec-quote {
    font-size: 0.9rem;
    line-height: 1.65;
    color: var(--text-muted);
    margin: 0;
    white-space: pre-wrap;
}

/* =========================================================
   Responsive
   ========================================================= */
@media (max-width: 768px) {
    .nav__toggle { display: flex; }

    .nav__links {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: var(--bg);
        border-bottom: 1px solid var(--border);
        flex-direction: column;
        gap: 0;
        padding: 1rem 0;
        transform: translateY(-110%);
        transition: transform var(--transition);
        z-index: 99;
    }
    .nav__links.open { transform: translateY(0); }
    .nav__links li { padding: 0; }
    .nav__links a {
        display: block;
        padding: 0.75rem 1.5rem;
    }

    .hero {
        align-items: flex-start;
    }
    .hero__inner {
        grid-template-columns: 1fr;
        text-align: center;
        padding-block: 3rem;
    }
    .hero__avatar-placeholder, .hero__avatar {
        margin-inline: auto;
        justify-self: center;
    }
    .hero__bio { margin-inline: auto; }
    .hero__cta { justify-content: center; }

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

    .section-title::after { display: none; }

    .exp-period { display: none; }
    .exp-role {
        white-space: normal;
        overflow: visible;
        text-overflow: clip;
    }
}

@media (max-width: 480px) {
    .projects-grid { grid-template-columns: 1fr; }
    .hero__avatar-placeholder { width: 150px; height: 150px; font-size: 3rem; }
    .hero__avatar { width: 150px; height: 150px; }
}