/* ===== Design tokens ===== */
:root {
    --bg: #0a0e14;
    --bg-elevated: #10151d;
    --card: #131a24;
    --card-border: #212b38;
    --text: #e8edf3;
    --text-muted: #8b96a5;
    --accent: #39ffb3;
    --accent-soft: #39ffb322;
    --accent-2: #4dd8ff;
    --font-display: 'Space Grotesk', sans-serif;
    --font-body: 'Inter', sans-serif;
    --max-width: 920px;
}

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    margin: 0;
    background: var(--bg);
    color: var(--text);
    font-family: var(--font-body);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3 {
    font-family: var(--font-display);
    margin: 0;
}

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

ul {
    padding-left: 1.1rem;
    margin: 0.6rem 0 0;
}

li {
    margin-bottom: 0.4rem;
    color: var(--text-muted);
}

::selection {
    background: var(--accent);
    color: #04140d;
}

/* ===== Loader ===== */
.initial-loader {
    position: fixed;
    inset: 0;
    background: var(--bg);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 9999;
    transition: opacity 0.3s ease;
}

.loader-spinner {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 3px solid var(--card-border);
    border-top-color: var(--accent);
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* ===== Background glow blobs ===== */
.bg-glow {
    position: fixed;
    border-radius: 50%;
    filter: blur(120px);
    pointer-events: none;
    z-index: 0;
    opacity: 0.35;
}

.bg-glow-1 {
    width: 500px;
    height: 500px;
    background: var(--accent);
    top: -150px;
    left: -150px;
    animation: float1 18s ease-in-out infinite;
}

.bg-glow-2 {
    width: 450px;
    height: 450px;
    background: var(--accent-2);
    bottom: -150px;
    right: -150px;
    animation: float2 22s ease-in-out infinite;
}

@keyframes float1 {
    0%, 100% {
        transform: translate(0, 0);
    }

    50% {
        transform: translate(80px, 60px);
    }
}

@keyframes float2 {
    0%, 100% {
        transform: translate(0, 0);
    }

    50% {
        transform: translate(-60px, -80px);
    }
}

/* ===== Navbar ===== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 100;
    background: rgba(10, 14, 20, 0.7);
    backdrop-filter: blur(12px);
    border-bottom: 1px solid var(--card-border);
}

.navbar-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 1.5rem;
}

.logo {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.3rem;
}

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

.nav-links {
    display: flex;
    gap: 1.75rem;
}

    .nav-links a {
        color: var(--text-muted);
        font-size: 0.9rem;
        font-weight: 500;
        position: relative;
        transition: color 0.25s ease;
    }

        .nav-links a::after {
            content: '';
            position: absolute;
            left: 0;
            bottom: -4px;
            width: 0;
            height: 2px;
            background: var(--accent);
            transition: width 0.25s ease;
        }

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

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

.lang-toggle {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 999px;
    padding: 0.35rem 0.7rem;
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--text-muted);
    display: flex;
    align-items: center;
    gap: 0.3rem;
    transition: border-color 0.25s ease;
}

    .lang-toggle:hover {
        border-color: var(--accent);
    }

    .lang-toggle .active {
        color: var(--accent);
    }

    .lang-toggle .sep {
        color: var(--card-border);
    }

@media (max-width: 640px) {
    .nav-links {
        display: none;
    }
}

/* ===== Hero ===== */
.hero {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: 6rem 1.5rem 2rem;
    position: relative;
    z-index: 1;
}

.hero-kicker {
    color: var(--accent);
    font-weight: 600;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    font-size: 0.85rem;
    margin-bottom: 0.75rem;
}

.hero-title {
    font-size: clamp(2.2rem, 6vw, 3.6rem);
    font-weight: 700;
    color: var(--text);
    margin-bottom: 1rem;
}

.typewriter {
    display: inline-block;
    overflow: hidden;
    white-space: nowrap;
    border-right: 3px solid var(--accent);
    animation: typing 1.8s steps(28, end) 0.3s 1 normal both, blink 0.85s step-end infinite;
}

@keyframes typing {
    from {
        width: 0;
    }

    to {
        width: 100%;
    }
}

@keyframes blink {
    50% {
        border-color: transparent;
    }
}

.hero-tagline {
    color: var(--text-muted);
    font-size: 1.05rem;
    max-width: 480px;
    margin: 0 auto 2rem;
}

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

.btn {
    padding: 0.8rem 1.6rem;
    border-radius: 8px;
    font-weight: 600;
    font-size: 0.92rem;
    transition: transform 0.2s ease, box-shadow 0.2s ease, background 0.2s ease;
    display: inline-block;
    cursor: pointer;
}

.btn-primary {
    background: var(--accent);
    color: #04140d;
}

    .btn-primary:hover {
        transform: translateY(-2px);
        box-shadow: 0 8px 24px var(--accent-soft);
    }

.btn-ghost {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--card-border);
}

    .btn-ghost:hover {
        border-color: var(--accent);
        color: var(--accent);
        transform: translateY(-2px);
    }

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
}

    .scroll-indicator span {
        display: block;
        width: 20px;
        height: 32px;
        border: 2px solid var(--card-border);
        border-radius: 12px;
        position: relative;
    }

        .scroll-indicator span::before {
            content: '';
            position: absolute;
            top: 6px;
            left: 50%;
            transform: translateX(-50%);
            width: 4px;
            height: 8px;
            background: var(--accent);
            border-radius: 2px;
            animation: scrollDown 1.6s ease-in-out infinite;
        }

@keyframes scrollDown {
    0% {
        opacity: 1;
        top: 6px;
    }

    100% {
        opacity: 0;
        top: 16px;
    }
}

/* ===== Scroll reveal ===== */
.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.7s ease, transform 0.7s ease;
}

    .reveal.visible {
        opacity: 1;
        transform: translateY(0);
    }

.hero .reveal {
    transition-delay: 0.05s;
}

/* ===== Sections ===== */
.section {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 6rem 1.5rem;
    position: relative;
    z-index: 1;
}

.section-num {
    color: var(--accent);
    font-family: var(--font-display);
    font-weight: 600;
    font-size: 0.85rem;
    letter-spacing: 0.1em;
}

.section-title {
    font-size: clamp(1.6rem, 4vw, 2.2rem);
    margin: 0.4rem 0 1.75rem;
    font-weight: 700;
}

.subsection-title {
    font-size: 1.1rem;
    font-weight: 600;
    margin: 2.5rem 0 1rem;
    color: var(--text);
}

.about-text {
    color: var(--text-muted);
    font-size: 1.05rem;
    max-width: 640px;
}

.about-location {
    margin-top: 1rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}

/* ===== Skills tag cloud ===== */
.tag-cloud {
    display: flex;
    flex-wrap: wrap;
    gap: 0.7rem;
}

.tag {
    background: var(--card);
    border: 1px solid var(--card-border);
    padding: 0.55rem 1.1rem;
    border-radius: 999px;
    font-size: 0.88rem;
    font-weight: 500;
    color: var(--text-muted);
    transition: all 0.25s ease;
    cursor: default;
}

    .tag:hover {
        border-color: var(--accent);
        color: var(--accent);
        box-shadow: 0 0 18px var(--accent-soft);
        transform: translateY(-3px);
    }

/* ===== Projects ===== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.25rem;
}

.project-card {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 14px;
    padding: 1.6rem;
    transition: all 0.3s ease;
}

    .project-card:hover {
        transform: translateY(-6px);
        border-color: var(--accent);
        box-shadow: 0 12px 32px rgba(0,0,0,0.35), 0 0 0 1px var(--accent-soft);
    }

.project-tool {
    display: inline-block;
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--accent-2);
    background: #4dd8ff17;
    padding: 0.25rem 0.6rem;
    border-radius: 6px;
    margin-bottom: 0.8rem;
}

.project-card-featured {
    border-color: var(--accent);
    background: linear-gradient(180deg, #131a24 0%, #0f1a16 100%);
}

.project-tool-featured {
    color: var(--accent);
    background: var(--accent-soft);
}

.project-card-warning {
    border-color: #ff5c5c;
    background: linear-gradient(180deg, #131a24 0%, #1a1010 100%);
}

.project-tool-warning {
    color: #ff5c5c;
    background: #ff5c5c22;
}

.project-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.3rem;
}

.project-card li {
    font-size: 0.88rem;
}

/* ===== Education timeline ===== */
.timeline-item {
    display: flex;
    gap: 1.5rem;
    padding: 1.5rem;
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 14px;
    border-left: 3px solid var(--accent);
}

.timeline-years {
    color: var(--accent);
    font-weight: 600;
    font-size: 0.85rem;
    white-space: nowrap;
    flex-shrink: 0;
}

.timeline-item h3 {
    font-size: 1.05rem;
    margin-bottom: 0.25rem;
}

.timeline-school {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin: 0 0 0.6rem;
}

.timeline-desc {
    color: var(--text-muted);
    font-size: 0.88rem;
    margin: 0;
}

@media (max-width: 560px) {
    .timeline-item {
        flex-direction: column;
        gap: 0.5rem;
    }
}

/* ===== Certs & languages grids ===== */
.certs-grid, .lang-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
}

.cert-card, .lang-card {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 10px;
    padding: 1rem 1.2rem;
    display: flex;
    flex-direction: column;
    gap: 0.3rem;
    transition: border-color 0.25s ease, transform 0.25s ease;
}

    .cert-card:hover, .lang-card:hover {
        border-color: var(--accent);
        transform: translateY(-3px);
    }

    .cert-card strong, .lang-card strong {
        font-size: 0.95rem;
    }

    .cert-card span, .lang-card span {
        color: var(--text-muted);
        font-size: 0.82rem;
    }

/* ===== Contact ===== */
.contact-section {
    text-align: left;
}

.contact-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(220px, 1fr));
    gap: 1rem;
    margin-top: 2rem;
}

.contact-card {
    background: var(--card);
    border: 1px solid var(--card-border);
    border-radius: 14px;
    padding: 1.4rem;
    display: flex;
    flex-direction: column;
    gap: 0.4rem;
    transition: all 0.3s ease;
}

    .contact-card:hover {
        border-color: var(--accent);
        transform: translateY(-4px);
        box-shadow: 0 10px 28px var(--accent-soft);
    }

.contact-label {
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.06em;
}

.contact-value {
    color: var(--text);
    font-weight: 600;
    font-size: 1rem;
}

/* ===== Footer ===== */
.footer {
    text-align: center;
    padding: 2.5rem 1.5rem;
    color: var(--text-muted);
    font-size: 0.82rem;
    border-top: 1px solid var(--card-border);
    position: relative;
    z-index: 1;
}

/* ===== Blazor error UI ===== */
#blazor-error-ui {
    background: #b91c1c;
    color: white;
    display: none;
    left: 0;
    bottom: 0;
    position: fixed;
    width: 100%;
    box-sizing: border-box;
    padding: 0.8rem 1.2rem;
    z-index: 1000;
    font-size: 0.85rem;
}

    #blazor-error-ui .dismiss {
        cursor: pointer;
        float: right;
    }

/* ===== Certificate modal (PDF) ===== */
.cert-clickable {
    cursor: pointer;
}

.cert-view-btn {
    margin-top: 0.4rem;
    color: var(--accent) !important;
    font-size: 0.78rem !important;
    font-weight: 600;
    opacity: 0;
    transform: translateX(-4px);
    transition: opacity 0.25s ease, transform 0.25s ease;
}

.cert-clickable:hover .cert-view-btn {
    opacity: 1;
    transform: translateX(0);
}

.cert-modal-overlay {
    position: fixed;
    inset: 0;
    background: rgba(5, 8, 12, 0.85);
    backdrop-filter: blur(6px);
    z-index: 200;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 2rem;
    animation: fadeIn 0.25s ease;
}

.cert-modal {
    position: relative;
    width: min(90vw, 720px);
    height: min(85vh, 900px);
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
    animation: scaleIn 0.25s ease;
}

.cert-modal-pdf {
    width: 100%;
    flex: 1;
    border-radius: 12px;
    border: 1px solid var(--card-border);
    box-shadow: 0 20px 60px rgba(0,0,0,0.5);
    background: white;
}

.cert-modal-download {
    align-self: center;
    color: var(--accent);
    font-size: 0.85rem;
    font-weight: 600;
}

.cert-modal-close {
    position: absolute;
    top: -14px;
    right: -14px;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background: var(--accent);
    color: #04140d;
    border: none;
    font-size: 1rem;
    font-weight: 700;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: transform 0.2s ease;
    z-index: 1;
}

    .cert-modal-close:hover {
        transform: scale(1.1);
    }

@keyframes fadeIn {
    from {
        opacity: 0;
    }

    to {
        opacity: 1;
    }
}

@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.92);
    }

    to {
        opacity: 1;
        transform: scale(1);
    }
}