/* ==========================================
   SYSADMIN PORTFOLIO — STYLESHEET
   Palette: Navy #0A0E1A | Cyan #00D4FF | Slate #1E2A3A
   Type: JetBrains Mono (display) + Inter (body)
   ========================================== */

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

:root {
    --bg:         #0A0E1A;
    --bg2:        #111827;
    --card:       #1A2235;
    --card-hover: #1E2A42;
    --border:     #1E3050;
    --footer-bg:  #06080F;
    --nav-bg:          rgba(10, 14, 26, 0.82);
    --nav-bg-scrolled: rgba(10, 14, 26, 0.97);
    --cyan:       #00D4FF;
    --cyan-dim:   rgba(0, 212, 255, 0.12);
    --cyan-glow:  rgba(0, 212, 255, 0.25);
    --green:      #39FF87;
    --yellow:     #FFD060;
    --red:        #FF5F57;
    --text:       #E0EAF4;
    --text-dim:   #6B85A0;
    --text-mid:   #9AAFC4;
    --mono:       'JetBrains Mono', monospace;
    --sans:       'Inter', sans-serif;
    --radius:     8px;
    --radius-lg:  14px;
    --transition: 0.22s ease;
}

/* ── LIGHT MODE ── */
:root[data-theme="light"] {
    --bg:         #F4F6FA;
    --bg2:        #FFFFFF;
    --card:       #FFFFFF;
    --card-hover: #EDF1F7;
    --border:     #DDE4EE;
    --footer-bg:  #EBEFF5;
    --nav-bg:          rgba(244, 246, 250, 0.82);
    --nav-bg-scrolled: rgba(244, 246, 250, 0.97);
    --cyan:       #0080A8;
    --cyan-dim:   rgba(0, 128, 168, 0.08);
    --cyan-glow:  rgba(0, 128, 168, 0.18);
    --green:      #16924F;
    --yellow:     #A8720C;
    --red:        #D1453B;
    --text:       #16202E;
    --text-dim:   #7C8AA0;
    --text-mid:   #4B5A70;
}

body { transition: background var(--transition), color var(--transition); }
.card, .terminal, .footer, .nav { transition: background var(--transition), border-color var(--transition); }

html { scroll-behavior: smooth; }

body {
    background: var(--bg);
    color: var(--text);
    font-family: var(--sans);
    font-size: 16px;
    line-height: 1.65;
    -webkit-font-smoothing: antialiased;
    overflow-x: hidden;
}

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

/* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: var(--bg); }
::-webkit-scrollbar-thumb { background: var(--border); border-radius: 3px; }

/* ==========================================
   NAV
   ========================================== */
.nav {
    position: fixed;
    top: 0; left: 0; right: 0;
    z-index: 100;
    background: var(--nav-bg);
    backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    transition: background var(--transition);
}
.nav__inner {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    height: 62px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 2rem;
}
.nav__logo {
    font-family: var(--mono);
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--cyan);
    letter-spacing: 0.04em;
    white-space: nowrap;
}
.nav__logo-bracket { opacity: 0.5; color: var(--text-dim); }
.nav__links {
    display: flex;
    align-items: center;
    gap: 2rem;
    list-style: none;
}
.nav__links a {
    font-family: var(--mono);
    font-size: 0.8rem;
    color: var(--text-mid);
    letter-spacing: 0.06em;
    transition: color var(--transition);
}
.nav__links a:hover { color: var(--cyan); }
.nav__cta {
    border: 1px solid var(--cyan) !important;
    color: var(--cyan) !important;
    padding: 0.35rem 1rem;
    border-radius: var(--radius);
    transition: background var(--transition), color var(--transition) !important;
}
.nav__cta:hover { background: var(--cyan) !important; color: var(--bg) !important; }

/* ── DROPDOWN SUBMENU ── */
.nav__item { position: relative; }
.nav__caret { font-size: 0.65em; margin-left: 0.2em; display: inline-block; transition: transform var(--transition); }
.nav__item--dropdown:hover .nav__caret { transform: rotate(180deg); }
.nav__dropdown {
    list-style: none;
    position: absolute; top: calc(100% + 0.6rem); left: -0.5rem;
    min-width: 160px; background: var(--card); border: 1px solid var(--border);
    border-radius: var(--radius); padding: 0.4rem;
    box-shadow: 0 12px 32px rgba(0,0,0,0.35);
    opacity: 0; visibility: hidden; transform: translateY(-6px);
    transition: opacity 0.18s ease, transform 0.18s ease, visibility 0.18s;
    z-index: 50;
}
.nav__item--dropdown:hover .nav__dropdown {
    opacity: 1; visibility: visible; transform: translateY(0);
}
.nav__dropdown li a {
    display: block; padding: 0.45rem 0.65rem; border-radius: 6px;
    font-family: var(--mono); font-size: 0.78rem; color: var(--text-mid);
    letter-spacing: 0.04em; white-space: nowrap;
    transition: background var(--transition), color var(--transition);
}
.nav__dropdown li a:hover { background: var(--cyan-dim); color: var(--cyan); }

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

/* ── THEME TOGGLE ── */
.theme-toggle {
    display: flex; align-items: center; justify-content: center;
    width: 36px; height: 36px; border-radius: 50%;
    background: var(--card); border: 1px solid var(--border);
    color: var(--text-mid); cursor: pointer; flex-shrink: 0;
    margin-left: 0.75rem;
    transition: border-color var(--transition), color var(--transition), background var(--transition), transform 0.3s;
}
.theme-toggle:hover { border-color: var(--cyan); color: var(--cyan); transform: rotate(20deg); }
.theme-toggle__icon { display: none; }
.theme-toggle__icon--sun  { display: block; }  /* shown in dark mode: click to go light */
:root[data-theme="light"] .theme-toggle__icon--sun  { display: none; }
:root[data-theme="light"] .theme-toggle__icon--moon { display: block; } /* shown in light mode: click to go dark */

/* ==========================================
   HERO
   ========================================== */
.hero {
    min-height: 100vh;
    padding: 100px 2rem 0;
    position: relative;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

/* scanline background effect */
.hero::before {
    content: '';
    position: absolute;
    inset: 0;
    background:
        radial-gradient(ellipse 60% 50% at 70% 40%, rgba(0, 212, 255, 0.06) 0%, transparent 70%),
        repeating-linear-gradient(
            0deg,
            transparent,
            transparent 2px,
            rgba(255,255,255,0.013) 2px,
            rgba(255,255,255,0.013) 4px
        );
    pointer-events: none;
}

.hero__grid {
    max-width: 1200px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    padding-bottom: 60px;
}

.hero__status {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    background: rgba(57, 255, 135, 0.08);
    border: 1px solid rgba(57, 255, 135, 0.25);
    border-radius: 100px;
    padding: 0.3rem 1rem;
    font-size: 0.78rem;
    font-family: var(--mono);
    color: var(--green);
    margin-bottom: 1.5rem;
    width: fit-content;
}
.hero__status-dot {
    width: 8px;
    height: 8px;
    border-radius: 50%;
    background: var(--green);
    box-shadow: 0 0 8px var(--green);
    animation: pulse 2s ease-in-out infinite;
}
@keyframes pulse {
    0%, 100% { opacity: 1; box-shadow: 0 0 8px var(--green); }
    50% { opacity: 0.5; box-shadow: 0 0 3px var(--green); }
}

.hero__name {
    font-family: var(--sans);
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.02em;
    margin-bottom: 0.5rem;
}

.hero__title {
    font-family: var(--mono);
    font-size: clamp(0.85rem, 1.5vw, 1rem);
    color: var(--cyan);
    letter-spacing: 0.04em;
    margin-bottom: 1.25rem;
}

.hero__tagline {
    font-size: 1.05rem;
    color: var(--text-mid);
    max-width: 440px;
    margin-bottom: 2.5rem;
    line-height: 1.7;
}

.hero__stats {
    display: flex;
    align-items: center;
    gap: 0;
    margin-bottom: 2.5rem;
    flex-wrap: wrap;
    gap: 1rem;
}
.stat { text-align: center; }
.stat__val {
    display: block;
    font-family: var(--mono);
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--cyan);
    line-height: 1.1;
}
.stat__label {
    display: block;
    font-size: 0.72rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-top: 2px;
}
.stat__divider {
    width: 1px;
    height: 40px;
    background: var(--border);
}

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

.btn {
    display: inline-block;
    padding: 0.75rem 1.75rem;
    border-radius: var(--radius);
    font-family: var(--mono);
    font-size: 0.85rem;
    font-weight: 600;
    letter-spacing: 0.04em;
    cursor: pointer;
    transition: all var(--transition);
}
.btn--primary {
    background: var(--cyan);
    color: var(--bg);
    border: 2px solid var(--cyan);
}
.btn--primary:hover {
    background: transparent;
    color: var(--cyan);
    box-shadow: 0 0 20px var(--cyan-glow);
}
.btn--ghost {
    background: transparent;
    color: var(--text-mid);
    border: 2px solid var(--border);
}
.btn--ghost:hover { border-color: var(--cyan); color: var(--cyan); }

/* ── TERMINAL ── */
.terminal {
    background: #0D1117;
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 0 60px rgba(0, 212, 255, 0.08), 0 24px 64px rgba(0,0,0,0.5);
    font-family: var(--mono);
    font-size: 0.82rem;
}
.terminal__bar {
    background: #161B22;
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
    border-bottom: 1px solid var(--border);
}
.terminal__dot {
    width: 12px; height: 12px;
    border-radius: 50%;
    display: inline-block;
}
.terminal__dot--red    { background: #FF5F57; }
.terminal__dot--yellow { background: #FEBC2E; }
.terminal__dot--green  { background: #28C840; }
.terminal__title {
    margin-left: 0.5rem;
    font-size: 0.72rem;
    color: var(--text-dim);
    flex: 1;
    text-align: center;
}
.terminal__body {
    padding: 1.25rem 1.5rem;
    min-height: 280px;
    line-height: 1.8;
    color: #B0C8E0;
}
.t-prompt { color: var(--cyan); font-weight: 600; margin-right: 0.5rem; }
.t-cmd    { color: var(--text); }
.t-cursor {
    display: inline-block;
    color: var(--cyan);
    animation: blink 1s step-end infinite;
    font-weight: 300;
    line-height: 1;
}
@keyframes blink { 0%, 100% { opacity: 1; } 50% { opacity: 0; } }

.t-output { display: block; padding-left: 0; color: var(--text-mid); margin-top: 2px; }
.t-output-line { display: block; }
.t-key   { color: var(--cyan); }
.t-val   { color: var(--green); }
.t-dim   { color: var(--text-dim); }
.t-warn  { color: var(--yellow); }
.t-sep   { color: var(--border); }
.t-title { color: var(--text); font-weight: 600; }
.t-err   { color: var(--red); }
.t-suc   { color: var(--green); }

/* ── UPTIME BAR ── */
.uptime-bar {
    background: rgba(26, 34, 53, 0.9);
    border-top: 1px solid var(--border);
    padding: 0.75rem 2rem;
    display: flex;
    align-items: center;
    gap: 1.5rem;
    flex-wrap: wrap;
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--text-dim);
}
.uptime-bar__label {
    color: var(--cyan);
    font-weight: 700;
    letter-spacing: 0.1em;
    margin-right: 0.5rem;
}
.uptime-bar__svc {
    display: flex;
    align-items: center;
    gap: 0.4rem;
}
.uptime-bar__dot {
    width: 7px;
    height: 7px;
    border-radius: 50%;
    background: var(--green);
    box-shadow: 0 0 6px var(--green);
    animation: pulse 2.5s ease-in-out infinite;
}
.uptime-bar__time {
    margin-left: auto;
    color: var(--text-dim);
}

/* ==========================================
   SECTIONS
   ========================================== */
.section { padding: 6rem 2rem; }
.section:nth-child(even) { background: var(--bg2); }
.container { max-width: 1200px; margin: 0 auto; }
.container--narrow { max-width: 780px; margin: 0 auto; }

.section__header { margin-bottom: 3.5rem; }
.section__eyebrow {
    display: block;
    font-family: var(--mono);
    font-size: 0.78rem;
    color: var(--cyan);
    letter-spacing: 0.08em;
    margin-bottom: 0.6rem;
}
.section__title {
    font-size: clamp(1.8rem, 3vw, 2.5rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    line-height: 1.15;
}
.section__sub {
    margin-top: 0.75rem;
    color: var(--text-mid);
    font-size: 1.05rem;
    max-width: 500px;
}

/* ==========================================
   SKILLS
   ========================================== */
.skills__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(260px, 1fr));
    gap: 1.25rem;
    margin-bottom: 3rem;
}
.skill-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.5rem;
    transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
    position: relative;
    overflow: hidden;
}
.skill-card::before {
    content: '';
    position: absolute;
    top: 0; left: 0; right: 0;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--cyan), transparent);
    opacity: 0;
    transition: opacity var(--transition);
}
.skill-card:hover { border-color: rgba(0,212,255,0.35); transform: translateY(-3px); box-shadow: 0 12px 40px rgba(0,0,0,0.3); }
.skill-card:hover::before { opacity: 1; }

.skill-card__icon { font-size: 1.75rem; margin-bottom: 0.75rem; }
.skill-card__cat {
    font-family: var(--mono);
    font-size: 0.82rem;
    font-weight: 600;
    color: var(--cyan);
    letter-spacing: 0.06em;
    margin-bottom: 1rem;
    text-transform: uppercase;
}
.skill-card__list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
}
.skill-card__list li {
    font-size: 0.88rem;
    color: var(--text-mid);
    padding-left: 0.85rem;
    position: relative;
}
.skill-card__list li::before {
    content: '▸';
    position: absolute;
    left: 0;
    color: var(--cyan);
    font-size: 0.65rem;
    top: 4px;
}

/* Certs */
.certs { margin-top: 1rem; }
.certs__label {
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: 1rem;
}
.certs__row { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.cert {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background: var(--card);
    border: 1px solid var(--border);
    border-left: 3px solid var(--cert-color, var(--cyan));
    border-radius: var(--radius);
    padding: 0.45rem 0.85rem;
    transition: transform var(--transition), box-shadow var(--transition);
    cursor: default;
}
.cert:hover { transform: translateY(-2px); box-shadow: 0 6px 20px rgba(0,0,0,0.25); }
.cert__badge {
    font-family: var(--mono);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--cert-color, var(--cyan));
}
.cert__year {
    font-family: var(--mono);
    font-size: 0.68rem;
    color: var(--text-dim);
}

/* ==========================================
   TIMELINE
   ========================================== */
.timeline { display: flex; flex-direction: column; gap: 0; }
.timeline__item {
    display: grid;
    grid-template-columns: 130px 40px 1fr;
    gap: 0 1rem;
    min-height: 80px;
}
.timeline__year {
    font-family: var(--mono);
    font-size: 0.75rem;
    color: var(--text-dim);
    padding-top: 4px;
    text-align: right;
    line-height: 1.3;
}
.timeline__connector {
    display: flex;
    flex-direction: column;
    align-items: center;
}
.timeline__node {
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--bg);
    border: 2px solid var(--cyan);
    box-shadow: 0 0 10px var(--cyan-glow);
    flex-shrink: 0;
    margin-top: 3px;
    transition: background var(--transition);
}
.timeline__item:hover .timeline__node { background: var(--cyan); }
.timeline__line {
    width: 1px;
    flex: 1;
    background: linear-gradient(var(--border), transparent);
    margin-top: 4px;
}
.timeline__content {
    padding-bottom: 2.5rem;
}
.timeline__role {
    font-size: 1.05rem;
    font-weight: 600;
    margin-bottom: 0.2rem;
    line-height: 1.3;
}
.timeline__org {
    font-family: var(--mono);
    font-size: 0.78rem;
    color: var(--cyan);
    margin-bottom: 0.5rem;
    letter-spacing: 0.04em;
}
.timeline__desc { font-size: 0.9rem; color: var(--text-mid); }
.timeline__desc p { margin: 0 0 .4rem; }
.timeline__desc p:last-child { margin-bottom: 0; }
.timeline__desc strong { color: var(--text); }

/* ==========================================
   PROJECTS
   ========================================== */
.projects__grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 1.5rem;
}
.project-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}
.project-card:hover {
    border-color: rgba(0,212,255,0.35);
    transform: translateY(-4px);
    box-shadow: 0 20px 50px rgba(0,0,0,0.35);
}
.project-card__metric {
    font-family: var(--mono);
    font-size: 0.75rem;
    font-weight: 700;
    color: var(--green);
    background: rgba(57, 255, 135, 0.08);
    border: 1px solid rgba(57, 255, 135, 0.2);
    display: inline-block;
    padding: 0.2rem 0.6rem;
    border-radius: 100px;
    width: fit-content;
}
.project-card__title {
    font-size: 1.1rem;
    font-weight: 700;
    line-height: 1.3;
}
.project-card__desc {
    font-size: 0.88rem;
    color: var(--text-mid);
    flex: 1;
    line-height: 1.65;
}
.project-card__desc p { margin: 0 0 0.5rem; }
.project-card__desc p:last-child { margin-bottom: 0; }
.project-card__tags { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-top: 0.5rem; }
.tag {
    font-family: var(--mono);
    font-size: 0.68rem;
    color: var(--cyan);
    background: var(--cyan-dim);
    border: 1px solid rgba(0,212,255,0.2);
    padding: 0.2rem 0.55rem;
    border-radius: 4px;
    letter-spacing: 0.04em;
}

/* ==========================================
   CONTACT
   ========================================== */
.contact__grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(230px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}
.contact-link {
    display: flex;
    align-items: center;
    gap: 1rem;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.25rem 1.5rem;
    transition: border-color var(--transition), transform var(--transition);
}
.contact-link:hover:not(.contact-link--plain) {
    border-color: rgba(0,212,255,0.35);
    transform: translateY(-2px);
}
.contact-link__icon {
    width: 42px;
    height: 42px;
    border-radius: var(--radius);
    background: var(--cyan-dim);
    border: 1px solid rgba(0,212,255,0.2);
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: var(--mono);
    font-weight: 700;
    font-size: 1rem;
    color: var(--cyan);
    flex-shrink: 0;
}
.contact-link > div { display: flex; flex-direction: column; gap: 0.15rem; }
.contact-link__icon--linkedin { background: #0A66C2; border-color: #0A66C2; color: #fff; }
.contact-link__icon--github { background: #24292F; border-color: #24292F; color: #fff; font-size: .78rem; }
.contact-link__label {
    font-family: var(--mono);
    font-size: 0.68rem;
    color: var(--text-dim);
    text-transform: uppercase;
    letter-spacing: 0.1em;
}
.contact-link__val { font-size: 0.9rem; color: var(--text); }

/* ==========================================
   FOOTER
   ========================================== */
.footer {
    background: var(--footer-bg);
    border-top: 1px solid var(--border);
    padding: 1.5rem 2rem;
}
.footer__inner {
    max-width: 1200px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 0.5rem;
}
.footer__mono {
    font-family: var(--mono);
    font-size: 0.72rem;
    color: var(--text-dim);
    display: flex;
    align-items: center;
}

/* ==========================================
   ANIMATIONS — FADE IN ON SCROLL
   ========================================== */
[data-index] { opacity: 0; transform: translateX(-12px); transition: opacity 0.5s ease, transform 0.5s ease; }
[data-index].visible { opacity: 1; transform: translateX(0); }
.skill-card { opacity: 0; transform: translateY(14px); transition: opacity 0.45s ease, transform 0.45s ease, border-color var(--transition), box-shadow var(--transition); }
.skill-card.visible { opacity: 1; transform: translateY(0); }
.project-card { opacity: 0; transform: translateY(14px); transition: opacity 0.45s ease, transform 0.45s ease, border-color var(--transition), box-shadow var(--transition); }
.project-card.visible { opacity: 1; transform: translateY(0); }

/* ==========================================
   RESPONSIVE
   ========================================== */
@media (max-width: 900px) {
    .hero__grid { grid-template-columns: 1fr; gap: 2.5rem; }
    .hero__right { order: -1; }
    .hero__stats { justify-content: flex-start; }
    .nav__links { display: none; }
    .nav__hamburger { display: flex; }
    .contact__grid { grid-template-columns: 1fr; }
    .timeline__item { grid-template-columns: 90px 32px 1fr; }

    /* Dropdown becomes an always-expanded nested list on mobile */
    .nav__dropdown {
        position: static; opacity: 1; visibility: visible; transform: none;
        box-shadow: none; border: none; background: none;
        margin: 0.35rem 0 0 1rem; padding: 0;
        display: flex; flex-direction: column; gap: 0.6rem;
    }
    .nav__dropdown li a { padding: 0; font-size: 0.76rem; color: var(--text-dim); }
    .nav__caret { display: none; }
}

@media (max-width: 600px) {
    .hero { padding: 90px 1.25rem 0; }
    .section { padding: 4rem 1.25rem; }
    .uptime-bar { padding: 0.6rem 1.25rem; }
    .hero__stats { gap: 0.75rem; }
    .stat__divider { display: none; }
    .timeline__year { font-size: 0.68rem; }
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after { animation: none !important; transition: none !important; }
}