/* ==========================================
   DESIGN TOKENS
   Paleta acromática dark — Space Grotesk + Inter
   ========================================== */
:root {
    /* Color */
    --ground:            #0E1118;
    --surface:           #1B1E25;
    --light-bg:          #262A32;
    --text-primary:      #F5F5F7;
    --text-secondary:    #98A0AA;
    --border:            rgba(255, 255, 255, .08);
    --border-light:      rgba(255, 255, 255, .18);
    --accent-white:      #FFFFFF;
    --accent-ink:        #14161A;
    --gradient-metal:    linear-gradient(135deg, #8A8D93 0%, #4A4D54 45%, #1A1D24 100%);

    /* Typography */
    --font-display: "Space Grotesk", -apple-system, sans-serif;
    --font-body:    "Inter", -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif;
    --font-mono:    "Monaco", "Menlo", "Ubuntu Mono", monospace;

    /* Spacing — base 4 px */
    --spacing-xs:  0.5rem;   /*  8 px */
    --spacing-sm:  1rem;     /* 16 px */
    --spacing-md:  1.5rem;   /* 24 px */
    --spacing-lg:  2rem;     /* 32 px */
    --spacing-xl:  3rem;     /* 48 px */
    --spacing-2xl: 4rem;     /* 64 px */
    --spacing-3xl: 7rem;     /* 112 px */

    /* Border radius */
    --radius-pill: 999px;
    --radius-lg:    20px;
    --radius-md:    14px;
    --radius-sm:     8px;

    /* Shadow */
    --shadow-soft: 0 8px 32px rgba(0, 0, 0, .35);
}

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

html {
    scroll-behavior: smooth;
}

body {
    background-color: var(--ground);
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 16px;
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* ==========================================
   LAYOUT
   ========================================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--spacing-lg);
}

/* ==========================================
   NAVIGATION
   ========================================== */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(14, 17, 24, .72);
    backdrop-filter: blur(14px);
    -webkit-backdrop-filter: blur(14px);
    border-bottom: 1px solid var(--border);
    padding: 1.1rem 0;
    z-index: 100;
}

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

.logo {
    font-family: var(--font-display);
    font-weight: 700;
    font-size: 1.05rem;
    color: var(--text-primary);
    letter-spacing: 0.02em;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
}

.nav-links a {
    position: relative;
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.75rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.09em;
    transition: color 0.2s ease;
}

.nav-links a::after {
    content: '';
    position: absolute;
    left: 0;
    bottom: -6px;
    width: 0;
    height: 1px;
    background: currentColor;
    transition: width 0.25s ease;
}

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

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

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

.menu-toggle span {
    width: 22px;
    height: 1.5px;
    background: var(--text-secondary);
    display: block;
    transition: all 0.25s ease;
}

.language-btn {
    background: transparent;
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
    padding: 6px 14px;
    border-radius: var(--radius-pill);
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 0.72rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.09em;
    transition: color 0.2s ease, border-color 0.2s ease;
}

.language-btn:hover {
    color: var(--text-primary);
    border-color: rgba(255, 255, 255, .4);
}

/* ==========================================
   BUTTONS
   ========================================== */
.btn {
    display: inline-block;
    padding: 13px 26px;
    border-radius: var(--radius-pill);
    border: 1px solid transparent;
    cursor: pointer;
    font-family: var(--font-body);
    font-size: 0.84rem;
    font-weight: 600;
    letter-spacing: 0.03em;
    text-decoration: none;
    transition: background 0.2s ease, border-color 0.2s ease, transform 0.2s ease;
    line-height: 1;
    white-space: nowrap;
}

.btn-primary {
    background: var(--accent-white);
    color: var(--accent-ink);
    border-color: var(--accent-white);
}

.btn-primary:hover {
    background: rgba(240, 240, 240, .9);
    border-color: rgba(240, 240, 240, .9);
    transform: translateY(-1px);
}

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

.btn-secondary:hover {
    background: rgba(255, 255, 255, .07);
    border-color: rgba(255, 255, 255, .38);
    transform: translateY(-1px);
}

/* ==========================================
   HERO
   ========================================== */
.hero {
    padding: 140px 0 64px;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1.1fr 0.9fr;
    align-items: center;
    gap: var(--spacing-2xl);
}

.hero-badge {
    display: block;
    color: var(--text-secondary);
    font-size: 0.72rem;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-md);
}

.hero-content h1 {
    font-family: var(--font-display);
    font-size: clamp(2.2rem, 4.2vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    letter-spacing: -0.03em;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.hero-content > p {
    font-size: 1rem;
    color: var(--text-secondary);
    line-height: 1.72;
    max-width: 48ch;
    margin-bottom: var(--spacing-lg);
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

/* Hero visual */
.hero-visual {
    position: relative;
}

.hero-visual::before {
    content: '';
    position: absolute;
    bottom: -28px;
    right: -28px;
    width: 280px;
    height: 280px;
    border-radius: 50%;
    border: 1px solid rgba(255, 255, 255, .08);
    pointer-events: none;
    z-index: 0;
}

.hero-visual-inner {
    position: relative;
    border-radius: var(--radius-lg);
    overflow: hidden;
    z-index: 1;
}

.hero-visual-inner img {
    width: 100%;
    height: 100%;
    min-height: 500px;
    object-fit: cover;
    object-position: top center;
    display: block;
    filter: grayscale(12%) contrast(1.06);
}

.hero-availability {
    position: absolute;
    top: 14px;
    right: 14px;
    background: rgba(20, 23, 30, .82);
    backdrop-filter: blur(8px);
    -webkit-backdrop-filter: blur(8px);
    border: 1px solid var(--border-light);
    border-radius: var(--radius-pill);
    padding: 6px 12px;
    font-size: 0.65rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    z-index: 2;
    white-space: nowrap;
}

/* ==========================================
   SECTIONS
   ========================================== */
.section {
    padding: var(--spacing-3xl) 0;
    border-top: 1px solid var(--border);
}

.section-header {
    margin-bottom: var(--spacing-2xl);
}

.section-header h2 {
    font-family: var(--font-display);
    font-size: clamp(1.7rem, 2.8vw, 2.3rem);
    font-weight: 700;
    letter-spacing: -0.025em;
    color: var(--text-primary);
    margin-bottom: 0.45rem;
}

.section-header p {
    color: var(--text-secondary);
    font-size: 0.72rem;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    font-weight: 500;
}

/* ==========================================
   ABOUT
   ========================================== */
.about-grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-2xl);
    align-items: flex-start;
}

.about-content h3 {
    font-family: var(--font-display);
    font-size: 1.2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.01em;
}

.about-content p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    line-height: 1.78;
    font-size: 0.94rem;
}

.about-content p:last-child {
    margin-bottom: 0;
}

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

/* ==========================================
   SKILLS
   ========================================== */
.skills-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--spacing-sm);
}

.skill-category {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: var(--spacing-md) var(--spacing-md);
}

.skill-category h3 {
    color: var(--text-secondary);
    font-size: 0.68rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-md);
    line-height: 1;
}

.skill-list {
    list-style: none;
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
}

.skill-list li {
    background: var(--light-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 5px 11px;
    font-size: 0.78rem;
    color: var(--text-secondary);
    font-weight: 500;
    line-height: 1;
}

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

.methodologies {
    margin-top: var(--spacing-2xl);
    padding-top: var(--spacing-lg);
    border-top: 1px solid var(--border);
}

.methodologies h3 {
    color: var(--text-secondary);
    font-size: 0.68rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-md);
}

.methodologies-grid {
    display: flex;
    flex-wrap: wrap;
    gap: 7px;
}

.methodology-item {
    background: var(--light-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-sm);
    padding: 6px 13px;
}

.methodology-item p {
    font-size: 0.78rem;
    color: var(--text-secondary);
    font-weight: 500;
    line-height: 1;
}

/* ==========================================
   EXPERIENCE
   ========================================== */
.experience-container {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.experience-card {
    position: relative;
    background: var(--surface);
    border: 1px solid var(--border);
    border-left: 2px solid var(--border-light);
    border-radius: var(--radius-lg);
    padding: var(--spacing-lg) var(--spacing-lg);
    overflow: hidden;
}

.step-badge {
    position: absolute;
    top: 14px;
    right: 22px;
    font-family: var(--font-display);
    font-size: 5rem;
    font-weight: 700;
    color: rgba(255, 255, 255, .04);
    line-height: 1;
    letter-spacing: -0.05em;
    pointer-events: none;
    user-select: none;
}

.experience-meta {
    font-size: 0.7rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    margin-bottom: var(--spacing-sm);
}

.experience-card h3 {
    font-family: var(--font-display);
    font-size: 1.12rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
    letter-spacing: -0.015em;
}

.experience-card p {
    color: var(--text-secondary);
    line-height: 1.78;
    font-size: 0.92rem;
    margin-bottom: var(--spacing-sm);
}

.experience-card p:last-child {
    margin-bottom: 0;
}

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

/* ==========================================
   PROJECTS
   ========================================== */
.projects-container {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-md);
}

.project-card {
    background: var(--surface);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    transition: border-color 0.25s ease, transform 0.25s ease;
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    border-color: var(--border-light);
    transform: translateY(-3px);
}

.project-header {
    position: relative;
    height: 210px;
    overflow: hidden;
    background: var(--light-bg);
    flex-shrink: 0;
}

.project-header::after {
    content: '';
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(14, 17, 24, .78) 0%, transparent 55%);
    z-index: 1;
    pointer-events: none;
}

.project-header img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    transition: transform 0.35s ease;
}

.project-card:hover .project-header img {
    transform: scale(1.04);
}

.project-content {
    padding: var(--spacing-md) var(--spacing-md);
    display: flex;
    flex-direction: column;
    flex: 1;
}

.project-content h3 {
    font-family: var(--font-display);
    font-size: 1.02rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    letter-spacing: -0.01em;
}

.project-content > p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-md);
    font-size: 0.86rem;
    line-height: 1.65;
    flex: 1;
}

.project-content > p strong {
    color: var(--text-primary);
    font-weight: 600;
}

.project-note {
    color: var(--text-secondary);
    font-size: 0.78rem;
    margin-top: var(--spacing-xs) !important;
    opacity: 0.7;
}

.tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
    margin-bottom: var(--spacing-md);
}

.tech-tag {
    background: var(--light-bg);
    border: 1px solid var(--border);
    border-radius: var(--radius-pill);
    padding: 4px 10px;
    font-size: 0.7rem;
    font-weight: 500;
    color: var(--text-secondary);
    letter-spacing: 0.03em;
}

.project-links {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-top: auto;
    padding-top: var(--spacing-sm);
    border-top: 1px solid var(--border);
}

.project-links-text {
    display: flex;
    gap: var(--spacing-md);
}

.project-links-text a {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.07em;
    transition: color 0.2s ease;
    padding-bottom: 1px;
    border-bottom: 1px solid transparent;
}

.project-links-text a:hover {
    color: var(--text-primary);
    border-bottom-color: var(--border-light);
}

.project-arrow {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 34px;
    height: 34px;
    border-radius: 50%;
    border: 1px solid var(--border-light);
    color: var(--text-secondary);
    text-decoration: none;
    transition: background 0.22s ease, border-color 0.22s ease, color 0.22s ease;
    flex-shrink: 0;
}

.project-arrow svg {
    width: 15px;
    height: 15px;
    transition: transform 0.22s ease;
    display: block;
}

.project-card:hover .project-arrow {
    background: var(--accent-white);
    border-color: var(--accent-white);
    color: var(--accent-ink);
}

.project-card:hover .project-arrow svg {
    transform: rotate(45deg);
}

/* ==========================================
   EDUCATION & CERTIFICATIONS
   ========================================== */
.education-section .skills-container {
    grid-template-columns: repeat(3, 1fr);
}

.edu-category-header {
    display: flex;
    align-items: center;
    gap: 9px;
    margin-bottom: var(--spacing-md);
}

.edu-category-header h3 {
    margin-bottom: 0;
}

.edu-cat-icon {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    border-radius: var(--radius-sm);
    background: var(--light-bg);
    border: 1px solid var(--border);
    color: var(--text-secondary);
    flex-shrink: 0;
}

.edu-cat-icon svg {
    width: 14px;
    height: 14px;
    display: block;
}

/* Override skill-list styling for edu items — these have multi-line content */
.education-section .skill-list {
    flex-direction: column;
    gap: var(--spacing-sm);
}

.education-section .skill-list li {
    background: transparent;
    border: none;
    border-radius: 0;
    padding: 0;
    font-size: 0.88rem;
    line-height: 1.6;
    color: var(--text-secondary);
    font-weight: 400;
}

.education-section .skill-list li strong {
    color: var(--text-primary);
    font-weight: 600;
    font-size: 0.88rem;
    display: block;
    margin-bottom: 2px;
}

/* ==========================================
   CONTACT / CTA BANNER
   ========================================== */
.contact-section {
    padding: var(--spacing-3xl) 0;
    border-top: 1px solid var(--border);
}

.contact-banner {
    background: var(--gradient-metal);
    border-radius: var(--radius-lg);
    padding: var(--spacing-2xl);
    display: grid;
    grid-template-columns: 1fr 0.6fr;
    gap: var(--spacing-2xl);
    align-items: center;
}

.contact-banner h2 {
    font-family: var(--font-display);
    font-size: clamp(1.7rem, 2.8vw, 2.6rem);
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.03em;
    margin-bottom: var(--spacing-sm);
    line-height: 1.1;
}

.contact-subtitle {
    color: rgba(245, 245, 247, .68);
    font-size: 0.94rem;
    line-height: 1.68;
    margin-bottom: var(--spacing-lg);
    max-width: 44ch;
}

.contact-cta {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.contact-info-list {
    display: flex;
    flex-direction: column;
    gap: 14px;
}

.contact-info-item {
    display: flex;
    align-items: center;
    gap: 10px;
}

.contact-info-item svg {
    width: 15px;
    height: 15px;
    color: rgba(245, 245, 247, .45);
    flex-shrink: 0;
    display: block;
}

.contact-info-item a,
.contact-info-item span {
    color: rgba(245, 245, 247, .68);
    font-size: 0.86rem;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.2s ease;
    line-height: 1;
}

.contact-info-item a:hover {
    color: var(--text-primary);
}

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

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-lg);
}

.footer p {
    color: var(--text-secondary);
    font-size: 0.78rem;
}

.footer-social {
    display: flex;
    gap: 8px;
    align-items: center;
}

.footer-social a {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    border: 1px solid var(--border);
    color: var(--text-secondary);
    text-decoration: none;
    transition: color 0.2s ease, border-color 0.2s ease;
}

.footer-social a:hover {
    color: var(--text-primary);
    border-color: var(--border-light);
}

.footer-social a svg {
    width: 14px;
    height: 14px;
    display: block;
}

/* ==========================================
   RESPONSIVE — 1024 px
   ========================================== */
@media (max-width: 1024px) {
    .hero-grid {
        gap: var(--spacing-lg);
    }

    .projects-container {
        grid-template-columns: repeat(2, 1fr);
    }

    .skills-container {
        grid-template-columns: repeat(2, 1fr);
    }

    .education-section .skills-container {
        grid-template-columns: repeat(2, 1fr);
    }
}

/* ==========================================
   RESPONSIVE — 768 px
   ========================================== */
@media (max-width: 768px) {
    /* Nav */
    .nav-links {
        display: none;
    }

    .menu-toggle {
        display: flex;
    }

    .nav-links.active {
        display: flex;
        flex-direction: column;
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        background: rgba(14, 17, 24, .97);
        backdrop-filter: blur(14px);
        -webkit-backdrop-filter: blur(14px);
        padding: var(--spacing-md) var(--spacing-lg);
        border-bottom: 1px solid var(--border);
        gap: var(--spacing-md);
        align-items: flex-start;
    }

    .menu-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(9px, 9px);
    }

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

    .menu-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(6px, -6px);
    }

    /* Hero */
    .hero {
        padding: 110px 0 48px;
    }

    .hero-grid {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
    }

    .hero-visual {
        order: -1;
    }

    .hero-visual::before {
        display: none;
    }

    .hero-visual-inner img {
        min-height: 320px;
    }

    .hero-content h1 {
        font-size: 2rem;
    }

    .hero-cta {
        flex-direction: column;
    }

    .hero-cta .btn {
        width: fit-content;
    }

    /* Sections */
    .section {
        padding: var(--spacing-2xl) 0;
    }

    .section-header h2 {
        font-size: 1.7rem;
    }

    /* Skills */
    .skills-container {
        grid-template-columns: 1fr;
    }

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

    /* Projects */
    .projects-container {
        grid-template-columns: 1fr;
    }

    /* Contact */
    .contact-banner {
        grid-template-columns: 1fr;
        padding: var(--spacing-lg);
        gap: var(--spacing-lg);
    }

    .contact-subtitle {
        max-width: 100%;
    }

    /* Footer */
    .footer-content {
        flex-direction: column;
        align-items: flex-start;
        gap: var(--spacing-sm);
    }

    /* Methodologies */
    .methodologies-grid {
        gap: 6px;
    }
}

/* ==========================================
   ACCESSIBILITY — reduced motion
   ========================================== */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.001ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.001ms !important;
        scroll-behavior: auto !important;
    }
}