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

:root {
    --bg-primary: #0a0a0f;
    --bg-secondary: #111118;
    --bg-elevated: #16161f;
    --bg-hover: #1c1c28;
    --text-primary: #e4e4e7;
    --text-secondary: #71717a;
    --text-muted: #52525b;
    --accent: #38bdf8;
    --accent-dim: rgba(56, 189, 248, 0.12);
    --accent-glow: rgba(56, 189, 248, 0.25);
    --border: #27272a;
    --border-subtle: #1e1e24;
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    --nav-height: 72px;
    --section-gap: 7rem;
}

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

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.7;
    overflow-x: hidden;
    -webkit-font-smoothing: antialiased;
}

.custom-cursor {
    display: none;
}

@media (pointer: fine) {
    body.custom-cursor-enabled,
    body.custom-cursor-enabled a,
    body.custom-cursor-enabled button {
        cursor: none;
    }

    body.custom-cursor-enabled .custom-cursor {
        display: block;
        position: fixed;
        inset: 0;
        z-index: 2000;
        pointer-events: none;
        opacity: 0;
        transition: opacity 0.15s ease;
        color: var(--accent);
    }

    body.custom-cursor-enabled .custom-cursor.visible {
        opacity: 1;
    }

    .custom-cursor-ring,
    .custom-cursor-dot {
        position: absolute;
        top: 0;
        left: 0;
        border-radius: 50%;
        background: transparent;
        will-change: transform;
    }

    .custom-cursor-ring {
        width: 54px;
        height: 54px;
        border: 2px solid var(--accent);
        transition: transform 0.14s ease-out;
    }

    .custom-cursor-dot {
        width: 10px;
        height: 10px;
        background: var(--accent);
    }
}

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

.container {
    max-width: 1080px;
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* Background grid */
.bg-grid {
    position: fixed;
    inset: 0;
    background-image:
        linear-gradient(var(--border-subtle) 1px, transparent 1px),
        linear-gradient(90deg, var(--border-subtle) 1px, transparent 1px);
    background-size: 64px 64px;
    mask-image: radial-gradient(ellipse 80% 60% at 50% 0%, black 20%, transparent 250%);
    pointer-events: none;
    z-index: 0;
}

main {
    position: relative;
    z-index: 1;
}

/* ── Navigation ── */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    height: var(--nav-height);
    background: rgba(10, 10, 15, 0.8);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border-subtle);
    z-index: 1000;
    transition: box-shadow var(--transition);
}

.navbar.scrolled {
    box-shadow: 0 4px 24px rgba(0, 0, 0, 0.4);
}

.nav-inner {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.nav-brand {
    font-family: var(--font-mono);
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
    text-decoration: none;
    letter-spacing: -0.02em;
}

.nav-brand-accent {
    color: var(--accent);
}

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

.nav-links a {
    display: flex;
    align-items: center;
    gap: 0.35rem;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.875rem;
    font-weight: 500;
    transition: color var(--transition);
}

.nav-index {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent);
}

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

.nav-toggle {
    display: none;
    flex-direction: column;
    justify-content: center;
    gap: 6px;
    width: 32px;
    height: 32px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0;
}

.nav-toggle span {
    display: block;
    width: 100%;
    height: 2px;
    background: var(--text-primary);
    transition: transform var(--transition), opacity var(--transition);
    transform-origin: center;
}

.nav-toggle.open span:first-child {
    transform: translateY(4px) rotate(45deg);
}

.nav-toggle.open span:last-child {
    transform: translateY(-4px) rotate(-45deg);
}

/* ── Hero ── */
.hero {
    position: fixed;
    top: var(--nav-height);
    bottom: 0;
    left: 0;
    width: 42%;
    display: flex;
    align-items: center;
    min-height: 0;
    padding: 0;
}

.hero > .container {
    width: 100%;
    padding-left: 6rem;
    padding-bottom: 5rem;
}

.hero-inner {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 4rem;
    width: 100%;
    padding: 3rem 0;
}

.content-panel {
    width: 58%;
    margin-left: 42%;
    padding-top: 11rem;
    padding-left : 5rem;
}

.content-panel > section:first-child {
    padding-top: 3rem;
}

.hero-text {
    flex: 1;
    max-width: 560px;
}

.hero-greeting {
    font-family: var(--font-mono);
    font-size: 0.95rem;
    color: var(--accent);
    margin-bottom: 0.75rem;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    letter-spacing: -0.03em;
    line-height: 1.1;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.hero-subtitle {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    min-height: 1.75rem;
}

.hero-description {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 480px;
    line-height: 1.8;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 0.75rem 1.75rem;
    border-radius: 6px;
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition);
    cursor: pointer;
}

.btn-primary {
    background: var(--accent);
    color: var(--bg-primary);
    border: 1px solid var(--accent);
}

.btn-primary:hover {
    background: transparent;
    color: var(--accent);
    box-shadow: 0 0 24px var(--accent-glow);
}

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

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

/* ── Sections ── */
section {
    padding: var(--section-gap) 0;
}

.section-title {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: clamp(1.5rem, 3vw, 1.75rem);
    font-weight: 600;
    margin-bottom: 3rem;
    letter-spacing: -0.02em;
    white-space: nowrap;
}

.section-title::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--border);
    margin-left: 0.5rem;
}

.section-index {
    font-family: var(--font-mono);
    font-size: 1rem;
    font-weight: 400;
    color: var(--accent);
}

.section-note {
    margin-top: 3rem;
    text-align: center;
    font-size: 0.95rem;
    color: var(--text-muted);
}

/* ── About ── */
.about-content {
    max-width: 640px;
    font-size: 1.05rem;
    color: var(--text-secondary);
}

.about-content p + p {
    margin-top: 1.25rem;
}

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

.project-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: 10px;
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    transition: border-color var(--transition), transform var(--transition), box-shadow var(--transition);
}

.project-card:hover {
    border-color: var(--border);
    transform: translateY(-4px);
    box-shadow: 0 12px 40px rgba(0, 0, 0, 0.3);
}

.project-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 1.25rem;
}

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

.project-external {
    color: var(--text-muted);
    transition: color var(--transition), transform var(--transition);
}

.project-external:hover {
    color: var(--accent);
    transform: translate(2px, -2px);
}

.project-title {
    font-size: 1.15rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
    color: var(--text-primary);
}

.project-description {
    flex: 1;
    color: var(--text-secondary);
    font-size: 0.925rem;
    line-height: 1.7;
    margin-bottom: 1.5rem;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-top: auto;
}

.tag {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    padding: 0.3rem 0.65rem;
    background: var(--accent-dim);
    color: var(--accent);
    border-radius: 4px;
}

.project-link {
    display: inline-block;
    margin-top: 1.25rem;
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--accent);
    text-decoration: none;
    transition: color var(--transition), transform var(--transition);
}

.project-link:hover {
    color: var(--text-primary);
    transform: translateX(3px);
}

/* ── Skills ── */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(min(100%, 220px), 1fr));
    gap: 1.25rem;
}

.skill-category {
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: 10px;
    padding: 1.5rem;
    transition: border-color var(--transition);
}

.skill-category:hover {
    border-color: var(--border);
}

.skill-category h3 {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.06em;
    margin-bottom: 1rem;
}

.skill-category ul {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(48px, 1fr));
    gap: 0.55rem;
}

.skill-category li {
    aspect-ratio: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--bg-elevated);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    color: var(--text-primary);
    font-size: 1.8rem;
    transition: border-color var(--transition), transform var(--transition);
}

.skill-category li:hover {
    border-color: var(--accent);
    transform: translateY(-2px);
}

.skill-category li i {
    line-height: 1;
}

.skill-category .devicon-django-plain.colored::before {
    color: #44b78b;
}

.skill-api-mark {
    font-family: var(--font-mono);
    color: var(--accent);
    font-size: 0.7rem;
    font-weight: 600;
    letter-spacing: -0.06em;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

/* ── Contact ── */
.contact-description {
    text-align: center;
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 480px;
    margin-left: auto;
    margin-right: auto;
}

.contact-links {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

.contact-link {
    display: inline-flex;
    align-items: center;
    gap: 0.6rem;
    padding: 0.85rem 1.5rem;
    background: var(--bg-secondary);
    border: 1px solid var(--border-subtle);
    border-radius: 8px;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: all var(--transition);
}

.contact-link:hover {
    border-color: var(--accent);
    color: var(--accent);
    transform: translateY(-2px);
    box-shadow: 0 8px 24px rgba(0, 0, 0, 0.2);
}

.contact-link svg {
    flex-shrink: 0;
}

/* ── Footer ── */
.footer {
    padding: 2rem 0;
    text-align: center;
    color: var(--text-muted);
    font-size: 0.85rem;
    border-top: 1px solid var(--border-subtle);
}

/* ── Animations ── */
.fade-up {
    opacity: 0;
    transform: translateY(24px);
    animation: fade-up 0.7s cubic-bezier(0.4, 0, 0.2, 1) forwards;
    animation-delay: var(--delay, 0s);
}

@keyframes fade-up {
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.reveal {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.6s cubic-bezier(0.4, 0, 0.2, 1);
}

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

.typewriter-cursor {
    display: inline-block;
    color: var(--accent);
    animation: blink 1s step-end infinite;
}

@keyframes blink {
    50% { opacity: 0; }
}

/* Stagger children in grids */
.projects-grid .reveal:nth-child(2) { transition-delay: 0.1s; }
.projects-grid .reveal:nth-child(3) { transition-delay: 0.2s; }
.skills-grid .reveal:nth-child(2) { transition-delay: 0.08s; }
.skills-grid .reveal:nth-child(3) { transition-delay: 0.16s; }
.skills-grid .reveal:nth-child(4) { transition-delay: 0.24s; }

/* ── Responsive ── */
@media (max-width: 768px) {
    :root {
        --section-gap: 5rem;
    }

    .hero {
        position: relative;
        top: auto;
        bottom: auto;
        left: auto;
        width: auto;
        min-height: 100vh;
        padding-top: var(--nav-height);
    }

    .hero > .container {
        height: auto;
    }

    .content-panel {
        width: 100%;
        margin-left: 0;
        padding-top: 0;
    }

    .content-panel > section:first-child {
        padding-top: var(--section-gap);
    }

    .nav-toggle {
        display: flex;
    }

    .nav-links {
        position: fixed;
        top: var(--nav-height);
        left: 0;
        right: 0;
        flex-direction: column;
        gap: 0;
        background: rgba(10, 10, 15, 0.97);
        backdrop-filter: blur(16px);
        border-bottom: 1px solid var(--border-subtle);
        padding: 1rem 0;
        transform: translateY(-110%);
        opacity: 0;
        transition: transform var(--transition), opacity var(--transition);
        pointer-events: none;
    }

    .nav-links.open {
        transform: translateY(0);
        opacity: 1;
        pointer-events: auto;
    }

    .nav-links li {
        padding: 0.75rem 1.5rem;
    }

    .hero-inner {
        flex-direction: column-reverse;
        text-align: center;
        gap: 2.5rem;
    }

    .hero-text {
        max-width: 100%;
    }

    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }

    .hero-cta {
        justify-content: center;
    }

    .photo-wrapper {
        width: 220px;
        height: 220px;
    }

    .scroll-hint {
        display: none;
    }

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

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

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

    .contact-link {
        width: 100%;
        max-width: 280px;
        justify-content: center;
    }
}

@media (max-width: 480px) {
    .hero-title {
        font-size: 2.25rem;
    }

    .btn {
        width: 100%;
    }
}

@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }

    .fade-up {
        opacity: 1;
        transform: none;
    }

    .reveal {
        opacity: 1;
        transform: none;
    }

    .custom-cursor-ring {
        transition: none;
    }
}