/* ============================
   DESIGN TOKENS & VARIABLES
   ============================ */
:root {
    /* Colors */
    --bg-primary: #0a0a0f;
    --bg-secondary: #12121a;
    --bg-card: rgba(255, 255, 255, 0.03);
    --bg-card-hover: rgba(255, 255, 255, 0.06);

    --text-primary: #e8e8ed;
    --text-secondary: #8888a0;
    --text-muted: #55556a;

    --accent: #6c5ce7;
    --accent-light: #a29bfe;
    --accent-glow: rgba(108, 92, 231, 0.3);
    --accent-2: #00cec9;
    --accent-2-glow: rgba(0, 206, 201, 0.25);

    --border: rgba(255, 255, 255, 0.06);
    --border-hover: rgba(255, 255, 255, 0.12);

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

    /* Spacing */
    --section-padding: 120px;
    --container-width: 1200px;

    /* Radius */
    --radius-sm: 8px;
    --radius-md: 12px;
    --radius-lg: 20px;
    --radius-xl: 28px;

    /* Transitions */
    --transition-fast: 0.2s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-smooth: 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-spring: 0.6s cubic-bezier(0.34, 1.56, 0.64, 1);
}

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

html {
    scroll-behavior: smooth;
    scrollbar-width: thin;
    scrollbar-color: var(--accent) var(--bg-secondary);
}

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

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

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

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

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

.section {
    padding: var(--section-padding) 0;
    position: relative;
}

.section-title {
    font-size: clamp(2rem, 4vw, 2.8rem);
    font-weight: 800;
    margin-bottom: 60px;
    letter-spacing: -0.03em;
}

.section-number {
    color: var(--accent);
    font-family: var(--font-mono);
    font-size: 0.6em;
    font-weight: 500;
    margin-right: 12px;
}

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

/* ============================
   ANIMATIONS
   ============================ */
.animate-on-scroll {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.7s cubic-bezier(0.4, 0, 0.2, 1),
                transform 0.7s cubic-bezier(0.4, 0, 0.2, 1);
}

.animate-on-scroll.visible {
    opacity: 1;
    transform: translateY(0);
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-12px); }
}

@keyframes pulse-glow {
    0%, 100% { opacity: 0.4; transform: scale(1); }
    50% { opacity: 0.7; transform: scale(1.05); }
}

@keyframes typing-cursor {
    0%, 100% { border-right-color: var(--accent-light); }
    50% { border-right-color: transparent; }
}

/* ============================
   NAVBAR
   ============================ */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    padding: 20px 0;
    transition: var(--transition-smooth);
    background: transparent;
}

.navbar.scrolled {
    padding: 12px 0;
    background: rgba(10, 10, 15, 0.85);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
}

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

.nav-logo {
    font-family: var(--font-mono);
    font-size: 1.4rem;
    font-weight: 700;
    color: var(--text-primary);
    transition: var(--transition-fast);
}

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

.nav-logo:hover .logo-bracket {
    color: var(--accent-light);
    text-shadow: 0 0 20px var(--accent-glow);
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 8px;
}

.nav-link {
    padding: 8px 18px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
    position: relative;
}

.nav-link:hover {
    color: var(--text-primary);
    background: rgba(255, 255, 255, 0.05);
}

.nav-link.active {
    color: var(--accent-light);
}

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 4px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: var(--transition-smooth);
}

.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;
    padding: 100px 0 80px;
    position: relative;
    overflow: hidden;
    max-width: var(--container-width);
    margin: 0 auto;
    gap: 60px;
    padding-left: 24px;
    padding-right: 24px;
}

.hero-bg-grid {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-image:
        linear-gradient(rgba(255,255,255,0.02) 1px, transparent 1px),
        linear-gradient(90deg, rgba(255,255,255,0.02) 1px, transparent 1px);
    background-size: 60px 60px;
    pointer-events: none;
    z-index: 0;
}

.hero-glow {
    position: absolute;
    border-radius: 50%;
    filter: blur(100px);
    pointer-events: none;
    z-index: 0;
}

.hero-glow--1 {
    width: 500px;
    height: 500px;
    background: var(--accent-glow);
    top: -100px;
    left: -150px;
    animation: pulse-glow 8s ease-in-out infinite;
}

.hero-glow--2 {
    width: 400px;
    height: 400px;
    background: var(--accent-2-glow);
    bottom: -50px;
    right: -100px;
    animation: pulse-glow 10s ease-in-out infinite 2s;
}

.hero-content {
    flex: 1;
    position: relative;
    z-index: 1;
}

.hero-greeting {
    font-family: var(--font-mono);
    font-size: 1rem;
    color: var(--accent-light);
    margin-bottom: 16px;
    letter-spacing: 0.05em;
}

.hero-title {
    display: flex;
    flex-direction: column;
    gap: 8px;
    margin-bottom: 24px;
}

.hero-name {
    font-size: clamp(2.5rem, 5.5vw, 4rem);
    font-weight: 900;
    letter-spacing: -0.04em;
    line-height: 1.1;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--text-secondary) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-role {
    font-size: clamp(1.3rem, 3vw, 2rem);
    font-weight: 600;
    color: var(--text-secondary);
    letter-spacing: -0.02em;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 520px;
    margin-bottom: 36px;
    line-height: 1.8;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 50px;
    flex-wrap: wrap;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 10px;
    padding: 14px 28px;
    font-size: 0.95rem;
    font-weight: 600;
    font-family: var(--font-main);
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: var(--transition-smooth);
    border: none;
    white-space: nowrap;
}

.btn--primary {
    background: linear-gradient(135deg, var(--accent) 0%, #8b7cf7 100%);
    color: #fff;
    box-shadow: 0 4px 24px var(--accent-glow);
}

.btn--primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 32px rgba(108, 92, 231, 0.45);
}

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

.btn--outline:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--accent);
    transform: translateY(-2px);
}

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

/* Stats */
.hero-stats {
    display: flex;
    gap: 40px;
}

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

.stat-number {
    font-size: 2.2rem;
    font-weight: 800;
    color: var(--text-primary);
    letter-spacing: -0.03em;
    line-height: 1;
}

.stat-plus {
    font-size: 1.6rem;
    font-weight: 700;
    color: var(--accent-light);
}

.stat-label {
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 6px;
}

/* Code Window */
.hero-visual {
    flex: 0.85;
    position: relative;
    z-index: 1;
}

.code-window {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.4);
    animation: float 6s ease-in-out infinite;
}

.code-window-header {
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 14px 18px;
    background: rgba(255, 255, 255, 0.03);
    border-bottom: 1px solid var(--border);
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
}

.dot--red { background: #ff5f57; }
.dot--yellow { background: #febc2e; }
.dot--green { background: #28c840; }

.code-window-title {
    margin-left: auto;
    font-family: var(--font-mono);
    font-size: 0.75rem;
    color: var(--text-muted);
}

.code-window-body {
    padding: 24px;
    font-family: var(--font-mono);
    font-size: 0.85rem;
    line-height: 1.9;
    overflow-x: auto;
}

.code-keyword { color: #c792ea; }
.code-var { color: #82aaff; }
.code-prop { color: var(--accent-2); }
.code-string { color: #c3e88d; }
.code-method { color: #82aaff; }

/* ============================
   ABOUT
   ============================ */
.about-grid {
    display: grid;
    grid-template-columns: 1.2fr 0.8fr;
    gap: 60px;
    align-items: center;
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 18px;
    font-size: 1.05rem;
}

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

.about-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 10px;
    margin-top: 28px;
}

.tag {
    padding: 6px 16px;
    font-size: 0.8rem;
    font-weight: 500;
    color: var(--accent-light);
    background: rgba(108, 92, 231, 0.1);
    border: 1px solid rgba(108, 92, 231, 0.2);
    border-radius: 50px;
    transition: var(--transition-fast);
}

.tag:hover {
    background: rgba(108, 92, 231, 0.2);
    transform: translateY(-2px);
}

.about-image-wrapper {
    position: relative;
}

.about-photo {
    width: 100%;
    aspect-ratio: 3 / 4;
    object-fit: cover;
    object-position: center top;
    border-radius: var(--radius-lg);
    border: 1px solid var(--border);
    position: relative;
    z-index: 1;
    transition: var(--transition-smooth);
    filter: grayscale(10%);
}

.about-photo:hover {
    filter: grayscale(0%);
    border-color: var(--accent);
    box-shadow: 0 0 30px var(--accent-glow);
}

.about-image-decoration {
    position: absolute;
    top: 20px;
    left: 20px;
    right: -20px;
    bottom: -20px;
    border: 2px solid var(--accent);
    border-radius: var(--radius-lg);
    opacity: 0.15;
    z-index: 0;
}

/* ============================
   SKILLS
   ============================ */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 24px;
}

.skill-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 36px 28px;
    transition: var(--transition-smooth);
    position: relative;
    overflow: hidden;
}

.skill-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 2px;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    transform: scaleX(0);
    transition: var(--transition-smooth);
}

.skill-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-4px);
}

.skill-card:hover::before {
    transform: scaleX(1);
}

.skill-icon {
    color: var(--accent-light);
    margin-bottom: 20px;
    transition: var(--transition-smooth);
}

.skill-card:hover .skill-icon {
    transform: scale(1.1);
    color: var(--accent-2);
}

.skill-title {
    font-size: 1.2rem;
    font-weight: 700;
    margin-bottom: 10px;
}

.skill-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.6;
}

.skill-bar {
    width: 100%;
    height: 4px;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 4px;
    overflow: hidden;
}

.skill-bar-fill {
    height: 100%;
    width: 0;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    border-radius: 4px;
    transition: width 1.5s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ============================
   PROJECTS
   ============================ */
.projects-grid {
    display: grid;
    gap: 32px;
}

.project-card {
    display: grid;
    grid-template-columns: 1fr 1fr;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-xl);
    overflow: hidden;
    transition: var(--transition-smooth);
}

.project-card:hover {
    border-color: var(--border-hover);
    transform: translateY(-4px);
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
}

.project-card:nth-child(even) {
    direction: rtl;
}

.project-card:nth-child(even) > * {
    direction: ltr;
}

.project-image {
    position: relative;
    overflow: hidden;
}

.project-thumb {
    width: 100%;
    height: 100%;
    min-height: 280px;
    object-fit: cover;
    object-position: top center;
    transition: var(--transition-smooth);
}

.project-card:hover .project-thumb {
    transform: scale(1.03);
    filter: brightness(1.05);
}

.project-info {
    padding: 40px;
    display: flex;
    flex-direction: column;
    justify-content: center;
}

.project-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 14px;
    letter-spacing: -0.02em;
}

.project-desc {
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.7;
    font-size: 0.95rem;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 24px;
}

.project-tags span {
    padding: 4px 14px;
    font-size: 0.78rem;
    font-weight: 500;
    font-family: var(--font-mono);
    color: var(--accent-2);
    background: rgba(0, 206, 201, 0.08);
    border-radius: 50px;
}

.project-links {
    display: flex;
    gap: 20px;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--text-secondary);
    transition: var(--transition-fast);
}

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

/* ============================
   BLOG
   ============================ */
.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
}

.blog-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 32px 28px;
    transition: var(--transition-smooth);
    display: flex;
    flex-direction: column;
    position: relative;
    overflow: hidden;
}

.blog-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 3px;
    background: linear-gradient(90deg, var(--accent), var(--accent-2));
    transform: scaleX(0);
    transform-origin: left;
    transition: var(--transition-smooth);
}

.blog-card:hover {
    background: var(--bg-card-hover);
    border-color: var(--border-hover);
    transform: translateY(-4px);
}

.blog-card:hover::before {
    transform: scaleX(1);
}

.blog-card-badge {
    display: inline-block;
    width: fit-content;
    padding: 4px 14px;
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--accent-light);
    background: rgba(108, 92, 231, 0.1);
    border-radius: 50px;
    margin-bottom: 14px;
}

.blog-card-date {
    font-size: 0.78rem;
    color: var(--text-muted);
    font-family: var(--font-mono);
    margin-bottom: 12px;
}

.blog-card-title {
    font-size: 1.15rem;
    font-weight: 700;
    line-height: 1.4;
    margin-bottom: 12px;
    letter-spacing: -0.01em;
}

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

.blog-card-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    font-size: 0.88rem;
    font-weight: 600;
    color: var(--accent-light);
    transition: var(--transition-fast);
}

.blog-card-link:hover {
    color: var(--accent);
    gap: 10px;
}

/* ============================
   CONTACT
   ============================ */
.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 60px;
    align-items: start;
}

.contact-text h3 {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 18px;
    letter-spacing: -0.02em;
}

.contact-text p {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.8;
    margin-bottom: 30px;
}

.contact-details {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.contact-item {
    display: inline-flex;
    align-items: center;
    gap: 14px;
    color: var(--text-secondary);
    font-size: 0.95rem;
    transition: var(--transition-fast);
}

a.contact-item:hover {
    color: var(--accent-light);
}

.contact-item svg {
    color: var(--accent-light);
    flex-shrink: 0;
}

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

.form-group {
    position: relative;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 18px 20px;
    font-size: 0.95rem;
    font-family: var(--font-main);
    color: var(--text-primary);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    outline: none;
    transition: var(--transition-fast);
    resize: vertical;
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-glow);
}

.form-group label {
    position: absolute;
    left: 20px;
    top: 18px;
    color: var(--text-muted);
    font-size: 0.95rem;
    transition: var(--transition-fast);
    pointer-events: none;
    background: transparent;
}

.form-group input:focus ~ label,
.form-group input:not(:placeholder-shown) ~ label,
.form-group textarea:focus ~ label,
.form-group textarea:not(:placeholder-shown) ~ label {
    top: -10px;
    left: 14px;
    font-size: 0.75rem;
    color: var(--accent-light);
    background: var(--bg-primary);
    padding: 0 6px;
}

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

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

.footer-text {
    color: var(--text-muted);
    font-size: 0.85rem;
}

.footer-socials {
    display: flex;
    gap: 12px;
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    transition: var(--transition-fast);
}

.social-link:hover {
    color: var(--accent-light);
    border-color: var(--accent);
    transform: translateY(-2px);
}

/* ============================
   RESPONSIVE
   ============================ */
@media (max-width: 1024px) {
    .hero {
        flex-direction: column;
        padding-top: 120px;
        text-align: center;
    }

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

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

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

    .hero-visual {
        max-width: 500px;
        width: 100%;
    }

    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }

    .about-image {
        order: -1;
        max-width: 320px;
        margin: 0 auto;
    }

    .project-card {
        grid-template-columns: 1fr;
    }

    .project-card:nth-child(even) {
        direction: ltr;
    }

    .project-image-placeholder {
        min-height: 220px;
    }

    .contact-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
}

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

    .nav-links {
        position: fixed;
        top: 0;
        right: -100%;
        width: 280px;
        height: 100vh;
        background: rgba(10, 10, 15, 0.97);
        backdrop-filter: blur(24px);
        flex-direction: column;
        padding: 100px 40px 40px;
        gap: 4px;
        transition: var(--transition-smooth);
        border-left: 1px solid var(--border);
    }

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

    .nav-toggle {
        display: flex;
        z-index: 1001;
    }

    .hero-stats {
        gap: 24px;
        flex-wrap: wrap;
    }

    .stat-number {
        font-size: 1.8rem;
    }

    .footer-content {
        flex-direction: column;
        gap: 20px;
        text-align: center;
    }
}

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

    .hero-role {
        font-size: 1.1rem;
    }

    .project-info {
        padding: 24px;
    }

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