/* =============================================
   MINIMALIST BOLD PORTFOLIO - CSS
   ============================================= */

:root {
    /* Colors */
    --white: #FFFFFF;
    --off-white: #F8F9FA;
    --light-gray: #E9ECEF;
    --gray: #ADB5BD;
    --dark-gray: #495057;
    --black: #0A0A0A;
    --accent: #0066FF;
    --accent-dark: #0052CC;

    /* Typography */
    --font-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-display: 'Playfair Display', Georgia, serif;

    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --spacing-xxl: 8rem;

    /* Layout */
    --container-max: 1200px;
    --border-radius: 0;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* =============================================
   RESET & BASE STYLES
   ============================================= */

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

html {
    scroll-behavior: smooth;
}

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

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

/* =============================================
   TYPOGRAPHY
   ============================================= */

h1, h2, h3, h4, h5, h6 {
    font-weight: 900;
    line-height: 1.1;
    letter-spacing: -0.02em;
}

h1 {
    font-size: clamp(3rem, 8vw, 7rem);
    font-family: var(--font-display);
}

h2 {
    font-size: clamp(2.5rem, 6vw, 5rem);
    font-family: var(--font-display);
}

h3 {
    font-size: clamp(1.5rem, 4vw, 2.5rem);
    font-weight: 700;
}

p {
    font-size: clamp(1rem, 2vw, 1.125rem);
    line-height: 1.8;
    font-weight: 400;
}

a {
    color: var(--black);
    text-decoration: none;
    transition: var(--transition);
}

/* =============================================
   NAVIGATION
   ============================================= */

.nav {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--white);
    border-bottom: 1px solid var(--light-gray);
    z-index: 1000;
    transition: var(--transition);
}

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

.nav-logo {
    font-size: 1.25rem;
    font-weight: 900;
    letter-spacing: -0.02em;
    text-transform: uppercase;
}

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: var(--spacing-lg);
}

.nav-menu li a {
    font-size: 0.9rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    position: relative;
}

.nav-menu li a::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--accent);
    transition: var(--transition);
}

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

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

.nav-toggle span {
    width: 25px;
    height: 2px;
    background-color: var(--black);
    transition: var(--transition);
}

/* =============================================
   HERO SECTION
   ============================================= */

.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background-color: var(--white);
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr;
    gap: var(--spacing-xl);
    align-items: center;
    justify-items: center;
    text-align: center;
}

.hero-label {
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.15em;
    color: var(--accent);
    margin-bottom: var(--spacing-sm);
}

.hero-title {
    margin-bottom: var(--spacing-md);
}

.hero-subtitle {
    font-size: 1.25rem;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-lg);
    margin-left: auto;
    margin-right: auto;
    max-width: 600px;
}

.hero-cta {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
    justify-content: center;
    align-items: center;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2.5rem;
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    border: 2px solid var(--black);
    cursor: pointer;
    transition: var(--transition);
}

.btn-primary {
    background-color: var(--black);
    color: var(--white);
}

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

.btn-secondary {
    background-color: transparent;
    color: var(--black);
}

.btn-secondary:hover {
    background-color: var(--black);
    color: var(--white);
}

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

.hero-image {
    width: 100%;
    height: 600px;
    background-color: var(--light-gray);
    position: relative;
    overflow: hidden;
}

.hero-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.hero-image::before {
    content: '';
    position: absolute;
    top: -20px;
    right: -20px;
    width: 100%;
    height: 100%;
    border: 2px solid var(--accent);
    z-index: -1;
}

/* =============================================
   SECTION STYLES
   ============================================= */

.section {
    padding: var(--spacing-xxl) 0;
}

.section:nth-child(even) {
    background-color: var(--off-white);
}

.section-header {
    display: flex;
    align-items: baseline;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-xl);
}

.section-number {
    font-size: 1rem;
    font-weight: 700;
    color: var(--accent);
    font-family: monospace;
}

.section-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
}

/* =============================================
   ABOUT SECTION
   ============================================= */

.about-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: var(--spacing-xl);
}

.about-text {
    font-size: 1.25rem;
    line-height: 1.8;
    color: var(--dark-gray);
}

.about-text p {
    margin-bottom: var(--spacing-md);
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.stat-item {
    border-left: 3px solid var(--accent);
    padding-left: var(--spacing-md);
}

.stat-number {
    font-size: 3rem;
    font-weight: 900;
    font-family: var(--font-display);
    color: var(--black);
    line-height: 1;
}

.stat-label {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--dark-gray);
    margin-top: 0.5rem;
}

/* =============================================
   WORK SECTION
   ============================================= */

.work-grid {
    display: grid;
    gap: var(--spacing-lg);
}

.work-item {
    display: grid;
    grid-template-columns: 200px 1fr;
    gap: var(--spacing-lg);
    padding: var(--spacing-lg);
    border: 1px solid var(--light-gray);
    transition: var(--transition);
}

.work-logo {
    display: block;
    height: 60px;
    max-width: 150px;
    object-fit: contain;
    object-position: left center;
    margin-bottom: var(--spacing-sm);
}

.work-item:hover {
    border-color: var(--accent);
    transform: translateX(10px);
}

.work-period {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--accent);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.work-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 0.5rem;
}

.work-company {
    font-size: 1rem;
    font-weight: 600;
    color: var(--dark-gray);
    margin-bottom: var(--spacing-sm);
}

.work-description {
    color: var(--dark-gray);
    line-height: 1.8;
}

/* =============================================
   SKILLS SECTION
   ============================================= */

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

#certifications-list {
    grid-template-columns: repeat(2, 1fr);
}

@media (max-width: 768px) {
    #certifications-list {
        grid-template-columns: 1fr;
    }
}

.skill-category {
    padding: var(--spacing-lg);
    background-color: var(--white);
    border: 1px solid var(--light-gray);
    transition: var(--transition);
}

.section:nth-child(even) .skill-category {
    background-color: var(--off-white);
}

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

.skill-category h3 {
    font-size: 1.25rem;
    font-weight: 700;
    margin-bottom: var(--spacing-md);
    padding-bottom: var(--spacing-sm);
    border-bottom: 2px solid var(--accent);
}

.skill-list {
    list-style: none;
}

.skill-list li {
    padding: 0.75rem 0;
    border-bottom: 1px solid var(--light-gray);
    font-weight: 500;
    transition: var(--transition);
}

.skill-list li:last-child {
    border-bottom: none;
}

.skill-list li:hover {
    color: var(--accent);
    padding-left: 0.5rem;
}

/* =============================================
   PROJECTS SECTION
   ============================================= */

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-lg);
}

.project-item {
    background-color: var(--white);
    border: 1px solid var(--light-gray);
    overflow: hidden;
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.section:nth-child(even) .project-item {
    background-color: var(--off-white);
}

.project-item:hover {
    border-color: var(--black);
    transform: translateY(-5px);
}

.project-image {
    width: 100%;
    aspect-ratio: 3 / 2;
    background-color: var(--light-gray);
    position: relative;
    overflow: hidden;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: var(--transition);
}

.project-item:hover .project-image img {
    transform: scale(1.05);
}

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

.project-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.project-description {
    color: var(--dark-gray);
    margin-bottom: var(--spacing-md);
    flex-grow: 1;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: var(--spacing-md);
}

.project-tag {
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    padding: 0.25rem 0.75rem;
    background-color: var(--light-gray);
    color: var(--black);
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent);
}

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

/* =============================================
   CONTACT SECTION
   ============================================= */

.contact-content {
    max-width: 800px;
}

.contact-description {
    font-size: 1.5rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-xl);
    color: var(--dark-gray);
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-lg);
}

.contact-item {
    padding: var(--spacing-lg);
    border: 1px solid var(--light-gray);
    transition: var(--transition);
}

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

.contact-label {
    font-size: 0.875rem;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 0.1em;
    color: var(--accent);
    margin-bottom: var(--spacing-sm);
}

.contact-value {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--black);
}

.contact-value a {
    color: var(--black);
}

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

/* =============================================
   FOOTER
   ============================================= */

.footer {
    background-color: var(--black);
    color: var(--white);
    padding: var(--spacing-xl) 0;
}

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

.footer-text {
    font-size: 0.875rem;
    color: var(--gray);
}

.footer-social {
    display: flex;
    gap: var(--spacing-md);
}

.social-link {
    font-size: 0.875rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--white);
    transition: var(--transition);
}

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

/* =============================================
   RESPONSIVE
   ============================================= */

@media (max-width: 768px) {
    :root {
        --spacing-lg: 2rem;
        --spacing-xl: 3rem;
        --spacing-xxl: 4rem;
    }

    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        flex-direction: column;
        background-color: var(--white);
        padding: var(--spacing-md);
        gap: var(--spacing-md);
        border-bottom: 1px solid var(--light-gray);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: var(--transition);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-toggle {
        display: flex;
    }

    .hero .container {
        grid-template-columns: 1fr;
    }

    .hero-image-wrapper {
        order: -1;
    }

    .hero-image {
        height: 400px;
    }

    .about-content {
        grid-template-columns: 1fr;
    }

    .work-item {
        grid-template-columns: 1fr;
    }

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

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

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