/* ==========================================================================
   CSS Custom Properties (Variables)
   ========================================================================== */
:root {
    /* Colors */
    --primary-color: #087f5b;
    --primary-dark: #064e3b;
    --secondary-color: #0ea5e9;
    --accent-color: #e11d48;
    --text-primary: #10231f;
    --text-secondary: #4b625c;
    --text-light: #6d827c;
    --bg-primary: #f7fbf8;
    --bg-secondary: #edf7f2;
    --bg-dark: #10231f;
    --surface: #ffffff;
    --border-color: #d9e7e1;

    /* Typography */
    --font-primary: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    --font-mono: 'Courier New', monospace;

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

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 8px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-normal: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgba(16, 35, 31, 0.06);
    --shadow-md: 0 10px 24px -18px rgba(16, 35, 31, 0.28);
    --shadow-lg: 0 18px 38px -24px rgba(16, 35, 31, 0.36);
    --shadow-xl: 0 26px 54px -30px rgba(16, 35, 31, 0.42);
}

/* ==========================================================================
   Reset & Base Styles
   ========================================================================== */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-primary);
    color: var(--text-primary);
    background-color: var(--bg-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

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

a:hover {
    color: var(--primary-color);
}

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

ul {
    list-style: none;
}

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

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    margin-bottom: var(--spacing-lg);
    color: var(--text-primary);
    position: relative;
}

.section-title::after {
    content: '';
    display: block;
    width: 80px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
    margin: 1rem auto 0;
    border-radius: var(--radius-sm);
}

/* ==========================================================================
   Navigation
   ========================================================================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background-color: var(--bg-primary);
    box-shadow: var(--shadow-md);
    z-index: 1000;
    transition: all var(--transition-normal);
}

.navbar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem var(--spacing-sm);
}

.nav-brand a {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.nav-menu {
    display: flex;
    gap: var(--spacing-md);
}

.nav-link {
    font-weight: 500;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.nav-link:hover {
    background-color: var(--bg-secondary);
    color: var(--primary-color);
}

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

.nav-toggle span {
    width: 25px;
    height: 3px;
    background-color: var(--text-primary);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

/* ==========================================================================
   Hero Section
   ========================================================================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #064e3b 0%, #087f5b 52%, #0ea5e9 100%);
    color: white;
    padding: var(--spacing-xl) 0;
    margin-top: 70px;
}

.hero-content {
    text-align: center;
    animation: fadeInUp 1s ease;
}

.hero-title {
    font-size: 3.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-sm);
}

.hero-title .highlight {
    color: var(--accent-color);
    background: linear-gradient(90deg, #fef08a, #7dd3fc);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 2rem;
    font-weight: 500;
    margin-bottom: var(--spacing-sm);
    color: rgba(255, 255, 255, 0.9);
}

.hero-description {
    font-size: 1.125rem;
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
    color: rgba(255, 255, 255, 0.9);
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.hero-description strong {
    color: white;
    font-weight: 700;
}

.hero-highlights {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    margin-bottom: var(--spacing-md);
    padding: var(--spacing-sm) 0;
}

.highlight-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    background-color: rgba(255, 255, 255, 0.1);
    padding: 0.75rem 1.25rem;
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
    transition: all var(--transition-fast);
    border: 1px solid rgba(255, 255, 255, 0.2);
}

.highlight-item:hover {
    background-color: rgba(255, 255, 255, 0.2);
    transform: translateY(-3px);
}

.highlight-item i {
    font-size: 1.25rem;
    color: var(--accent-color);
}

.highlight-item span {
    font-size: 0.9rem;
    font-weight: 600;
    color: white;
}

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

.btn {
    padding: 0.875rem 2rem;
    border-radius: var(--radius-md);
    font-weight: 600;
    font-size: 1rem;
    cursor: pointer;
    transition: all var(--transition-normal);
    border: 2px solid transparent;
    display: inline-block;
}

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

.btn-primary:hover {
    background-color: var(--primary-dark);
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background-color: transparent;
    color: white;
    border-color: white;
}

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

.social-links {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: center;
    margin-top: var(--spacing-md);
}

.social-links a {
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    background-color: rgba(255, 255, 255, 0.1);
    border-radius: 50%;
    font-size: 1.5rem;
    transition: all var(--transition-fast);
}

.social-links a:hover {
    background-color: white;
    color: var(--primary-color);
    transform: translateY(-5px);
}

/* ==========================================================================
   About Section
   ========================================================================== */
.about {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-primary);
}

.about-content {
    max-width: 900px;
    margin: 0 auto;
}

.about-text p {
    font-size: 1.125rem;
    line-height: 1.8;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-md);
    margin-top: var(--spacing-lg);
}

.stat-item {
    text-align: center;
    padding: var(--spacing-md);
    background-color: var(--bg-secondary);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.stat-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.stat-item h3 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.stat-item p {
    color: var(--text-secondary);
    font-weight: 500;
}

/* ==========================================================================
   Experience Section
   ========================================================================== */
.experience {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-secondary);
}

.timeline {
    max-width: 900px;
    margin: 0 auto;
    position: relative;
    padding-left: 50px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--primary-color), var(--secondary-color));
}

.timeline-item {
    position: relative;
    margin-bottom: var(--spacing-lg);
    padding-left: var(--spacing-md);
}

.timeline-item::before {
    content: '';
    position: absolute;
    left: -35px;
    top: 0;
    width: 16px;
    height: 16px;
    background-color: var(--primary-color);
    border: 4px solid var(--bg-primary);
    border-radius: 50%;
}

.timeline-content {
    background-color: var(--bg-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.timeline-content:hover {
    transform: translateX(10px);
    box-shadow: var(--shadow-lg);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-sm);
    flex-wrap: wrap;
}

.timeline-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.timeline-company {
    font-size: 1.125rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.timeline-period {
    font-size: 0.875rem;
    color: var(--text-light);
    font-weight: 500;
}

.timeline-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-top: var(--spacing-xs);
}

.timeline-description ul {
    list-style: disc;
    margin-left: 1.5rem;
    margin-top: var(--spacing-xs);
}

.timeline-description li {
    margin-bottom: 0.5rem;
}

/* ==========================================================================
   Skills Section
   ========================================================================== */
.skills {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-primary);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: var(--spacing-md);
}

.skill-category {
    background-color: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    transition: all var(--transition-normal);
}

.skill-category:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.skill-category h3 {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-sm);
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.skill-category h3 i {
    font-size: 1.25rem;
}

.skill-list {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-xs);
}

.skill-tag {
    background-color: var(--bg-primary);
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    font-size: 0.875rem;
    color: var(--text-secondary);
    border: 1px solid var(--border-color);
    transition: all var(--transition-fast);
}

.skill-tag:hover {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* ==========================================================================
   Projects Section
   ========================================================================== */
.projects {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-secondary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: var(--spacing-md);
}

.project-card {
    background-color: var(--bg-primary);
    border-radius: var(--radius-md);
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-xl);
}

.project-image {
    width: 100%;
    height: 200px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 4rem;
    color: white;
}

.project-content {
    padding: var(--spacing-md);
}

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

.project-description {
    color: var(--text-secondary);
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
}

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

.tech-badge {
    background-color: var(--bg-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    color: var(--primary-color);
    font-weight: 600;
}

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

.project-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--primary-color);
    font-weight: 500;
    transition: all var(--transition-fast);
}

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

/* ==========================================================================
   Education Section
   ========================================================================== */
.education {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-primary);
}

.education-content {
    max-width: 1000px;
    margin: 0 auto;
}

.education-grid {
    display: grid;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-lg);
}

.education-item {
    background-color: var(--bg-secondary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
    transition: all var(--transition-normal);
}

.education-item:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-lg);
}

.education-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    margin-bottom: var(--spacing-xs);
    flex-wrap: wrap;
}

.education-degree {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
}

.education-school {
    font-size: 1.125rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.education-period {
    font-size: 0.875rem;
    color: var(--text-light);
    font-weight: 500;
}

.certifications h3 {
    font-size: 2rem;
    margin-bottom: var(--spacing-md);
    color: var(--text-primary);
}

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

.cert-item {
    background-color: var(--bg-secondary);
    padding: var(--spacing-sm);
    border-radius: var(--radius-md);
    border-left: 4px solid var(--primary-color);
    transition: all var(--transition-fast);
}

.cert-item:hover {
    background-color: var(--primary-color);
    color: white;
}

/* ==========================================================================
   Contact Section
   ========================================================================== */
.contact {
    padding: var(--spacing-xl) 0;
    background-color: var(--bg-secondary);
}

.contact-content {
    max-width: 1000px;
    margin: 0 auto;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.contact-item {
    display: flex;
    align-items: flex-start;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm);
    background-color: var(--bg-primary);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.contact-item:hover {
    box-shadow: var(--shadow-md);
}

.contact-item i {
    font-size: 1.5rem;
    color: var(--primary-color);
    margin-top: 0.25rem;
}

.contact-item h3 {
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.25rem;
}

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

.contact-form-container {
    background-color: var(--bg-primary);
    padding: var(--spacing-md);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

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

.form-group input,
.form-group textarea {
    padding: 0.875rem;
    border: 1px solid var(--border-color);
    border-radius: var(--radius-sm);
    font-family: var(--font-primary);
    font-size: 1rem;
    transition: all var(--transition-fast);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(8, 127, 91, 0.14);
}

.contact-form .btn {
    width: 100%;
}

/* ==========================================================================
   Footer
   ========================================================================== */
.footer {
    background-color: var(--bg-dark);
    color: white;
    padding: var(--spacing-md) 0;
    text-align: center;
}

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

.footer-links {
    display: flex;
    gap: var(--spacing-sm);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.8);
    transition: color var(--transition-fast);
}

.footer-links a:hover {
    color: white;
}

/* ==========================================================================
   Animations
   ========================================================================== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ==========================================================================
   Responsive Design
   ========================================================================== */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 70px;
        flex-direction: column;
        background-color: var(--bg-primary);
        width: 100%;
        text-align: center;
        transition: left var(--transition-normal);
        box-shadow: var(--shadow-lg);
        padding: var(--spacing-md) 0;
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.5rem;
    }

    .hero-description {
        font-size: 1rem;
        padding: 0 var(--spacing-sm);
    }

    .hero-highlights {
        flex-direction: column;
        align-items: center;
        gap: var(--spacing-sm);
    }

    .highlight-item {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }

    .section-title {
        font-size: 2rem;
    }

    .hero-cta {
        flex-direction: column;
        padding: 0 var(--spacing-sm);
    }

    .timeline {
        padding-left: 30px;
    }

    .timeline::before {
        left: 10px;
    }

    .timeline-item::before {
        left: -25px;
    }

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

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

    .hero-subtitle {
        font-size: 1.25rem;
    }

    .section-title {
        font-size: 1.75rem;
    }

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

/* ==========================================================================
   Frontend Polish Pass
   ========================================================================== */
html {
    scroll-padding-top: 88px;
}

body {
    letter-spacing: 0;
    background-color: var(--bg-primary);
}

.container {
    width: min(100% - 2rem, 1180px);
    padding: 0;
}

.section-title {
    font-size: 2.35rem;
    line-height: 1.15;
    margin-bottom: 3rem;
}

.section-title::after {
    width: 64px;
    height: 3px;
    background: var(--accent-color);
}

.navbar {
    background-color: rgba(255, 255, 255, 0.92);
    border-bottom: 1px solid rgba(217, 231, 225, 0.86);
    box-shadow: none;
    backdrop-filter: blur(18px);
}

.navbar.is-scrolled {
    box-shadow: var(--shadow-md);
}

.navbar .container {
    min-height: 68px;
    padding: 0;
}

.nav-brand a {
    color: var(--text-primary);
    font-size: 1.15rem;
    line-height: 1.2;
}

.nav-link {
    color: var(--text-secondary);
    font-size: 0.95rem;
    border: 1px solid transparent;
}

.nav-link:hover,
.nav-link.is-active {
    background-color: rgba(8, 127, 91, 0.1);
    color: var(--primary-dark);
    border-color: rgba(8, 127, 91, 0.16);
}

.nav-toggle {
    padding: 0.45rem;
    border-radius: var(--radius-md);
}

.nav-toggle:focus-visible,
.btn:focus-visible,
.project-link:focus-visible,
.social-links a:focus-visible,
.footer-links a:focus-visible,
.contact-item a:focus-visible {
    outline: 3px solid rgba(14, 165, 233, 0.36);
    outline-offset: 3px;
}

.hero {
    position: relative;
    isolation: isolate;
    min-height: min(780px, 88svh);
    justify-content: flex-start;
    margin-top: 0;
    padding: 7.5rem 0 4.5rem;
    background-image:
        linear-gradient(90deg, rgba(6, 78, 59, 0.9) 0%, rgba(6, 78, 59, 0.74) 42%, rgba(16, 35, 31, 0.52) 100%),
        url("https://images.unsplash.com/photo-1768796373577-2e6e51351165?q=80&w=1800&auto=format&fit=crop");
    background-position: center;
    background-size: cover;
}

.hero-content {
    width: 100%;
    max-width: 760px;
    min-width: 0;
    text-align: left;
    animation: none;
}

.hero-portrait {
    width: 92px;
    height: 92px;
    margin-bottom: 1.35rem;
    border: 3px solid rgba(255, 255, 255, 0.9);
    border-radius: 50%;
    background-color: rgba(255, 255, 255, 0.16);
    box-shadow: 0 18px 40px -24px rgba(0, 0, 0, 0.7);
    overflow: hidden;
}

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

.hero-portrait.is-fallback {
    display: grid;
    place-items: center;
    color: white;
    font-size: 1.55rem;
    font-weight: 800;
}

.hero-title {
    max-width: 12ch;
    font-size: 4rem;
    line-height: 1;
    margin-bottom: 1rem;
}

.hero-title .highlight {
    color: #fef08a;
    background: none;
    -webkit-text-fill-color: currentColor;
}

.hero-subtitle {
    display: inline-flex;
    align-items: center;
    min-height: 42px;
    padding: 0.5rem 0.9rem;
    background-color: rgba(255, 255, 255, 0.12);
    border: 1px solid rgba(255, 255, 255, 0.24);
    border-radius: var(--radius-md);
    font-size: 1.35rem;
}

.hero-description {
    max-width: 680px;
    margin: 1.25rem 0 1.5rem;
    font-size: 1.12rem;
}

.hero-highlights {
    justify-content: flex-start;
    gap: 0.75rem;
    margin-bottom: 1.75rem;
    padding: 0;
}

.highlight-item {
    background-color: rgba(255, 255, 255, 0.14);
    border-color: rgba(255, 255, 255, 0.22);
    box-shadow: none;
}

.highlight-item:hover {
    transform: translateY(-2px);
}

.highlight-item i {
    color: #7dd3fc;
}

.hero-cta,
.social-links {
    justify-content: flex-start;
}

.btn {
    min-height: 48px;
    border-radius: var(--radius-md);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
}

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

.hero .btn-primary:hover,
.btn-primary:hover {
    background-color: var(--primary-dark);
    border-color: var(--primary-dark);
}

.btn-secondary:hover {
    color: var(--primary-dark);
}

.social-links a {
    width: auto;
    height: 44px;
    gap: 0.5rem;
    padding: 0 0.9rem;
    border: 1px solid rgba(255, 255, 255, 0.22);
    border-radius: var(--radius-md);
    font-size: 0.95rem;
    font-weight: 700;
}

.social-links a span {
    color: inherit;
}

.social-links a:hover {
    transform: translateY(-3px);
}

.about,
.skills,
.education {
    background-color: var(--bg-primary);
}

.experience,
.projects,
.contact {
    background-color: var(--bg-secondary);
}

.about-content {
    display: grid;
    grid-template-columns: minmax(0, 1.4fr) minmax(260px, 0.6fr);
    gap: 3rem;
    max-width: 1080px;
    align-items: start;
}

.about-text {
    max-width: 720px;
}

.about-text p {
    font-size: 1.08rem;
}

.about-stats {
    grid-template-columns: 1fr;
    gap: 1rem;
    margin-top: 0;
}

.stat-item,
.timeline-content,
.skill-category,
.project-card,
.education-item,
.contact-item,
.contact-form-container,
.cert-item {
    background-color: var(--surface);
    border: 1px solid var(--border-color);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-md);
}

.stat-item,
.skill-category,
.education-item,
.contact-form-container {
    padding: 1.5rem;
}

.stat-item:hover,
.skill-category:hover,
.project-card:hover,
.education-item:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
}

.stat-item h3 {
    color: var(--primary-dark);
    font-size: 2.25rem;
    line-height: 1;
}

.timeline {
    max-width: 1000px;
}

.timeline::before {
    background: var(--primary-color);
}

.timeline-item::before {
    background-color: var(--accent-color);
    border-color: var(--bg-secondary);
}

.timeline-content:hover {
    transform: translateX(6px);
}

.timeline-header {
    gap: 1rem;
}

.timeline-period,
.education-period {
    padding: 0.3rem 0.65rem;
    background-color: rgba(8, 127, 91, 0.1);
    border-radius: var(--radius-sm);
    color: var(--primary-dark);
}

.timeline-description ul {
    margin-top: 1rem;
}

.timeline-description li::marker {
    color: var(--accent-color);
}

.skills-grid {
    align-items: stretch;
}

.skill-category {
    display: flex;
    min-height: 100%;
    flex-direction: column;
}

.skill-category h3 {
    color: var(--primary-dark);
}

.skill-category h3 i {
    color: var(--secondary-color);
}

.skill-tag,
.tech-badge {
    background-color: rgba(8, 127, 91, 0.08);
    border-color: rgba(8, 127, 91, 0.18);
    color: var(--primary-dark);
}

.skill-tag:hover {
    background-color: var(--primary-color);
}

.projects-grid {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

.project-card {
    display: flex;
    min-height: 100%;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-6px);
}

.project-image {
    height: 172px;
    background: linear-gradient(135deg, rgba(8, 127, 91, 0.95), rgba(14, 165, 233, 0.82));
}

.project-image i {
    width: 76px;
    height: 76px;
    display: grid;
    place-items: center;
    background-color: rgba(255, 255, 255, 0.14);
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: var(--radius-md);
    backdrop-filter: blur(10px);
}

.project-content {
    display: flex;
    flex: 1;
    flex-direction: column;
}

.project-description {
    flex: 1;
}

.project-links {
    margin-top: auto;
}

.project-link {
    padding: 0.55rem 0.8rem;
    border: 1px solid rgba(8, 127, 91, 0.2);
    border-radius: var(--radius-sm);
    background-color: rgba(8, 127, 91, 0.08);
}

.project-link:hover {
    background-color: var(--primary-color);
    color: white;
}

.certifications h3 {
    text-align: center;
}

.cert-item {
    border-left-color: var(--accent-color);
}

.cert-item:hover {
    background-color: var(--primary-dark);
}

.cert-issuer {
    margin-top: 0.25rem;
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.cert-item:hover .cert-issuer {
    color: rgba(255, 255, 255, 0.78);
}

.contact-content {
    align-items: start;
}

.contact-item {
    padding: 1.15rem;
}

.contact-item:hover {
    transform: translateY(-2px);
}

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

.form-group input,
.form-group textarea {
    background-color: #fbfefd;
    border-color: var(--border-color);
}

.form-group input:focus,
.form-group textarea:focus {
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(8, 127, 91, 0.14);
}

.form-status {
    min-height: 1.5rem;
    color: var(--primary-dark);
    font-size: 0.95rem;
    font-weight: 600;
}

.footer {
    background-color: var(--bg-dark);
}

@media (max-width: 900px) {
    .nav-menu {
        gap: 0.5rem;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .about-stats {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    html {
        scroll-padding-top: 76px;
    }

    .container {
        width: min(100% - 1.25rem, 1180px);
    }

    .navbar .container {
        min-height: 64px;
    }

    .nav-menu {
        top: 64px;
        gap: 0.75rem;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-link {
        display: block;
        width: min(100% - 2rem, 360px);
        margin: 0 auto;
    }

    .hero {
        min-height: auto;
        padding: 6rem 0 3.25rem;
    }

    .hero-content,
    .hero-cta,
    .social-links,
    .hero-highlights {
        justify-content: center;
        text-align: center;
    }

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

    .hero-title {
        max-width: 11ch;
        margin-right: auto;
        margin-left: auto;
        font-size: 2.6rem;
    }

    .hero-title .highlight,
    #heroGreeting {
        display: block;
    }

    .hero-subtitle {
        font-size: 1.15rem;
    }

    .hero-description {
        width: 100%;
        margin-right: auto;
        margin-left: auto;
        max-width: min(100%, 32ch);
        padding: 0;
    }

    .highlight-item {
        width: auto;
        max-width: none;
    }

    .hero-cta {
        flex-direction: row;
        padding: 0;
    }

    .btn {
        width: 100%;
        max-width: 320px;
    }

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

    .timeline-content:hover {
        transform: translateY(-3px);
    }
}

@media (max-width: 520px) {
    .section-title {
        font-size: 1.85rem;
    }

    .hero {
        padding: 4.75rem 0 2rem;
    }

    .hero-portrait {
        width: 74px;
        height: 74px;
        margin-bottom: 0.8rem;
    }

    .hero-title {
        font-size: 1.95rem;
        max-width: 10ch;
        margin-bottom: 0.75rem;
    }

    .hero-subtitle {
        min-height: 36px;
        padding: 0.4rem 0.7rem;
        font-size: 1rem;
    }

    .hero-description {
        max-width: min(100%, 26ch);
        margin-top: 0.9rem;
        margin-bottom: 1rem;
        font-size: 0.98rem;
        line-height: 1.55;
    }

    .hero-highlights {
        align-items: stretch;
        gap: 0.55rem;
        margin-bottom: 1rem;
    }

    .highlight-item {
        justify-content: flex-start;
        padding: 0.55rem 0.75rem;
    }

    .hero-cta {
        flex-direction: row;
        align-items: center;
        gap: 0.6rem;
    }

    .btn {
        width: auto;
        min-width: 145px;
        min-height: 44px;
        padding: 0.65rem 0.9rem;
    }

    .social-links {
        margin-top: 1rem;
    }

    .social-links a {
        height: 38px;
        padding: 0 0.7rem;
        font-size: 0.85rem;
    }

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

    .footer .container {
        justify-content: center;
    }
}

@media (prefers-reduced-motion: reduce) {
    html {
        scroll-behavior: auto;
    }

    *,
    *::before,
    *::after {
        transition-duration: 0.01ms !important;
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
    }
}