/* ================================================
   DETAIL PIPELINES — Portfolio Stylesheet
   Premium dark-mode data engineer portfolio
   ================================================ */

/* ---- CSS Custom Properties ---- */
:root {
    /* Palette */
    --bg-primary: #0a0a0f;
    --bg-secondary: #111118;
    --bg-surface: #16161f;
    --bg-card: #1a1a25;
    --bg-card-hover: #20202e;
    --border: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.12);

    /* Accent — electric teal + warm violet */
    --accent-1: #00d4aa;
    --accent-2: #7c5cfc;
    --accent-3: #3b82f6;
    --gradient: linear-gradient(135deg, var(--accent-1), var(--accent-2));

    /* Text */
    --text-primary: #e8e8ed;
    --text-secondary: #9a9ab0;
    --text-muted: #5c5c72;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-mono: 'JetBrains Mono', 'Fira Code', monospace;

    /* Spacing & Sizing */
    --container-max: 1140px;
    --section-py: 120px;
    --radius-sm: 8px;
    --radius-md: 14px;
    --radius-lg: 20px;

    /* Transitions */
    --ease-out: cubic-bezier(0.22, 1, 0.36, 1);
}

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

html {
    scroll-behavior: smooth;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

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

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

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

ul {
    list-style: none;
}

button {
    cursor: pointer;
    border: none;
    font-family: inherit;
}

input,
textarea {
    font-family: inherit;
}

.container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
}

/* ---- Utility ---- */
.text-gradient {
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ---- Scroll Reveal ---- */
.reveal {
    opacity: 0;
    transform: translateY(32px);
    transition: opacity 0.7s var(--ease-out), transform 0.7s var(--ease-out);
}

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

/* ================================================
   NAVIGATION
   ================================================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: all 0.4s var(--ease-out);
}

.navbar--scrolled {
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
    padding: 12px 0;
}

.nav-container {
    max-width: var(--container-max);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    display: flex;
    align-items: center;
    transition: opacity 0.3s;
}

.nav-logo:hover {
    opacity: 0.8;
}

.nav-logo-img {
    height: 40px;
    width: auto;
}

.logo-bracket {
    color: var(--text-muted);
}

.logo-highlight {
    color: var(--accent-1);
}

.nav-links {
    display: flex;
    gap: 36px;
}

.nav-links a {
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    position: relative;
    transition: color 0.3s;
}

.nav-links a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient);
    border-radius: 2px;
    transition: width 0.3s var(--ease-out);
}

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

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

/* Hamburger */
.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    padding: 4px;
}

.nav-toggle span {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-secondary);
    border-radius: 2px;
    transition: all 0.3s var(--ease-out);
}

.nav-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle.active span:nth-child(2) {
    opacity: 0;
}

.nav-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* ================================================
   HERO
   ================================================ */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    overflow: hidden;
    padding: 100px 24px 60px;
}

/* Full-width background image */
.hero-bg-image {
    position: absolute;
    inset: 0;
    background: url('images/hero-bg.png') center center / cover no-repeat;
}

.hero-bg-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to bottom,
            rgba(10, 10, 15, 0.45) 0%,
            rgba(10, 10, 15, 0.65) 40%,
            rgba(10, 10, 15, 0.85) 75%,
            rgba(10, 10, 15, 0.97) 100%);
}

/* Subtle dot-grid background */
.hero-bg-grid {
    position: absolute;
    inset: 0;
    background-image:
        radial-gradient(circle, rgba(255, 255, 255, 0.03) 1px, transparent 1px);
    background-size: 32px 32px;
    mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 20%, transparent 70%);
    -webkit-mask-image: radial-gradient(ellipse 70% 60% at 50% 40%, black 20%, transparent 70%);
}

/* Ambient glow */
.hero-glow {
    position: absolute;
    width: 600px;
    height: 600px;
    border-radius: 50%;
    filter: blur(120px);
    opacity: 0.08;
    pointer-events: none;
}

.hero-glow--1 {
    background: var(--accent-1);
    top: -10%;
    left: -5%;
}

.hero-glow--2 {
    background: var(--accent-2);
    bottom: -15%;
    right: -10%;
}

.hero-content {
    max-width: 750px;
    text-align: center;
    position: relative;
    z-index: 1;
    animation: fadeInUp 1s var(--ease-out) both;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(40px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.hero-greeting {
    font-size: 1rem;
    font-weight: 500;
    color: var(--accent-1);
    letter-spacing: 0.15em;
    text-transform: uppercase;
    margin-bottom: 12px;
}

.hero-title {
    display: flex;
    flex-direction: column;
    gap: 4px;
    margin-bottom: 24px;
}

.hero-name {
    font-size: clamp(2.4rem, 5vw, 3.8rem);
    font-weight: 800;
    letter-spacing: -0.03em;
    line-height: 1.1;
}

.hero-role {
    font-size: clamp(1.2rem, 2.5vw, 1.6rem);
    font-weight: 500;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 580px;
    margin: 0 auto 36px;
    line-height: 1.8;
}

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

.hero-cta {
    display: flex;
    gap: 16px;
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: 48px;
}

/* ---- Buttons ---- */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    border-radius: 50px;
    font-size: 0.95rem;
    font-weight: 600;
    transition: all 0.35s var(--ease-out);
    position: relative;
    overflow: hidden;
}

.btn--primary {
    background: var(--gradient);
    color: #0a0a0f;
    box-shadow: 0 4px 24px rgba(0, 212, 170, 0.2);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(0, 212, 170, 0.35);
}

.btn--outline {
    background: transparent;
    color: var(--text-primary);
    border: 1.5px solid var(--border-hover);
}

.btn--outline:hover {
    border-color: var(--accent-1);
    color: var(--accent-1);
    transform: translateY(-2px);
}

.btn--full {
    width: 100%;
    justify-content: center;
}

/* Tech ticker */
.hero-tech-ticker {
    display: flex;
    gap: 24px;
    justify-content: center;
    flex-wrap: wrap;
}

.hero-tech-ticker span {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--text-muted);
    padding: 6px 14px;
    border: 1px solid var(--border);
    border-radius: 50px;
    transition: all 0.3s;
}

.hero-tech-ticker span:hover {
    border-color: var(--accent-1);
    color: var(--accent-1);
}

/* Scroll indicator */
.hero-scroll-indicator {
    position: absolute;
    bottom: 32px;
    left: 50%;
    transform: translateX(-50%);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
}

.hero-scroll-indicator span {
    font-size: 0.7rem;
    letter-spacing: 0.15em;
    text-transform: uppercase;
    color: var(--text-muted);
}

.scroll-line {
    width: 1px;
    height: 40px;
    background: linear-gradient(to bottom, var(--accent-1), transparent);
    animation: scrollPulse 2s ease-in-out infinite;
}

@keyframes scrollPulse {

    0%,
    100% {
        opacity: 0.3;
        transform: scaleY(0.6);
    }

    50% {
        opacity: 1;
        transform: scaleY(1);
    }
}

/* ================================================
   SECTIONS — Shared
   ================================================ */
.section {
    padding: var(--section-py) 0;
    position: relative;
}

.section-label {
    font-family: var(--font-mono);
    font-size: 0.8rem;
    color: var(--accent-1);
    letter-spacing: 0.12em;
    text-transform: uppercase;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(1.8rem, 3.5vw, 2.6rem);
    font-weight: 700;
    letter-spacing: -0.02em;
    margin-bottom: 16px;
    line-height: 1.2;
}

.section-desc {
    font-size: 1.05rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: 48px;
}

/* ================================================
   ABOUT
   ================================================ */
.about {
    background: var(--bg-secondary);
}

.about-grid {
    display: grid;
    grid-template-columns: 1.1fr 1fr;
    gap: 64px;
    align-items: start;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-size: 1rem;
}

.about-text p strong {
    color: var(--text-primary);
}

.about-stats {
    display: flex;
    gap: 40px;
    margin-top: 32px;
    padding-top: 28px;
    border-top: 1px solid var(--border);
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 1.75rem;
    font-weight: 700;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 4px;
}

.skills-heading {
    font-size: 1.1rem;
    font-weight: 600;
    margin-bottom: 20px;
}

.skills-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.skill-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 24px;
    transition: all 0.35s var(--ease-out);
}

.skill-card:hover {
    border-color: var(--border-hover);
    background: var(--bg-card-hover);
    transform: translateY(-4px);
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.skill-icon {
    font-size: 1.5rem;
    margin-bottom: 12px;
}

.skill-card h4 {
    font-size: 0.95rem;
    font-weight: 600;
    margin-bottom: 8px;
    color: var(--text-primary);
}

.skill-card p {
    font-size: 0.85rem;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ================================================
   PROJECTS
   ================================================ */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    display: flex;
    flex-direction: column;
    position: relative;
    transition: all 0.4s var(--ease-out);
}

.project-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-6px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.project-card--featured {
    grid-column: 1 / -1;
    background: linear-gradient(135deg, rgba(0, 212, 170, 0.04), rgba(124, 92, 252, 0.04));
    border-color: rgba(0, 212, 170, 0.15);
}

.project-card--featured:hover {
    border-color: rgba(0, 212, 170, 0.35);
}

.project-card__badge {
    position: absolute;
    top: 20px;
    right: 20px;
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--accent-1);
    background: rgba(0, 212, 170, 0.1);
    padding: 4px 12px;
    border-radius: 50px;
    letter-spacing: 0.1em;
    text-transform: uppercase;
}

.project-card__header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: 16px;
}

.project-card__icon {
    font-size: 1.6rem;
}

.project-link {
    color: var(--text-muted);
    transition: color 0.3s;
    padding: 4px;
}

.project-link:hover {
    color: var(--accent-1);
}

.project-card__title {
    font-size: 1.2rem;
    font-weight: 600;
    margin-bottom: 12px;
    line-height: 1.3;
}

.project-card__desc {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.7;
    flex: 1;
    margin-bottom: 20px;
}

.project-card__tech {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.project-card__tech li {
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--accent-1);
    background: rgba(0, 212, 170, 0.08);
    padding: 5px 12px;
    border-radius: 50px;
}

/* ================================================
   BLOG
   ================================================ */
.blog {
    background: var(--bg-secondary);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
}

.blog-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
    display: flex;
    flex-direction: column;
    transition: all 0.4s var(--ease-out);
}

.blog-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-6px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.blog-card__meta {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

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

.blog-card__tag {
    font-family: var(--font-mono);
    font-size: 0.7rem;
    font-weight: 600;
    background: rgba(124, 92, 252, 0.12);
    color: var(--accent-2);
    padding: 3px 10px;
    border-radius: 50px;
    letter-spacing: 0.05em;
    text-transform: uppercase;
}

.blog-card__title {
    font-size: 1.1rem;
    font-weight: 600;
    line-height: 1.4;
    margin-bottom: 12px;
}

.blog-card__title a {
    transition: color 0.3s;
}

.blog-card__title a:hover {
    color: var(--accent-1);
}

.blog-card__excerpt {
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.7;
    flex: 1;
    margin-bottom: 20px;
}

.blog-card__link {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--accent-1);
    transition: gap 0.3s, color 0.3s;
    display: inline-flex;
    align-items: center;
    gap: 4px;
}

.blog-card__link:hover {
    gap: 8px;
}

/* ================================================
   CONTACT
   ================================================ */
.contact-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 48px;
    align-items: start;
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: 6px;
}

.form-group label {
    font-size: 0.85rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 14px 16px;
    color: var(--text-primary);
    font-size: 0.95rem;
    outline: none;
    transition: border-color 0.3s, box-shadow 0.3s;
    resize: vertical;
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--text-muted);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent-1);
    box-shadow: 0 0 0 3px rgba(0, 212, 170, 0.1);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.contact-info__card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px;
}

.contact-info__card h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 16px;
}

.contact-info__card p {
    font-size: 0.92rem;
    color: var(--text-secondary);
    line-height: 1.7;
}

.contact-info__card--accent {
    background: linear-gradient(135deg, rgba(0, 212, 170, 0.06), rgba(124, 92, 252, 0.06));
    border-color: rgba(0, 212, 170, 0.15);
}

.social-links {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.social-links a {
    display: inline-flex;
    align-items: center;
    gap: 12px;
    color: var(--text-secondary);
    font-size: 0.9rem;
    transition: color 0.3s;
}

.social-links a:hover {
    color: var(--accent-1);
}

.social-links svg {
    flex-shrink: 0;
}

/* ================================================
   FOOTER
   ================================================ */
.footer {
    padding: 40px 0;
    border-top: 1px solid var(--border);
}

.footer-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.footer-logo {
    display: flex;
    align-items: center;
}

.footer-logo-img {
    height: 32px;
    width: auto;
}

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

/* ================================================
   RESPONSIVE
   ================================================ */
@media (max-width: 1024px) {
    .about-grid {
        grid-template-columns: 1fr;
        gap: 48px;
    }

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

    .project-card--featured {
        grid-column: auto;
    }

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

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

@media (max-width: 768px) {
    :root {
        --section-py: 80px;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: var(--bg-secondary);
        border-left: 1px solid var(--border);
        flex-direction: column;
        padding: 100px 40px 40px;
        gap: 28px;
        transition: right 0.4s var(--ease-out);
    }

    .nav-links.open {
        right: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-links a {
        font-size: 1.1rem;
    }

    .hero {
        min-height: 90vh;
        padding-top: 80px;
    }

    .hero-tech-ticker {
        gap: 10px;
    }

    .hero-tech-ticker span {
        font-size: 0.7rem;
        padding: 5px 10px;
    }

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

    .about-stats {
        gap: 24px;
    }

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

    .footer-container {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
}

@media (max-width: 480px) {
    .hero-name {
        font-size: 2rem;
    }

    .hero-cta {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        justify-content: center;
    }

    .about-stats {
        flex-direction: column;
        gap: 16px;
    }

    .section-title {
        font-size: 1.6rem;
    }
}