@import url('https://fonts.googleapis.com/css2?family=Figtree:ital,wght@0,300..900;1,300..900&family=Open+Sans:ital,wght@0,300..800;1,300..800&display=swap');

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

:root {
    --color-black: #000000;
    --color-white: #ffffff;
    --color-dark-gray: #1a1a1a;
    --color-medium-gray: #333333;
    --color-light-gray: #f5f5f5;
    --color-border: #e5e5e5;
    --color-accent: #168378;
    --color-accent-light: #e6f9f7;
    --color-text: #222222;
    --color-text-light: #333333;
    
    --font-family-body: 'Open Sans', sans-serif;
    --font-family-heading: 'Figtree', sans-serif;
    --font-size-base: 16px;
    --font-size-sm: 14px;
    --font-size-lg: 18px;
    --font-size-xl: 20px;
    --font-size-2xl: 24px;
    --font-size-3xl: 32px;
    --font-size-4xl: 48px;
    
    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
    --spacing-2xl: 48px;
    --spacing-3xl: 64px;
    
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-fast: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: var(--font-family-body);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text);
    background-color: var(--color-white);
}

/* ===== Accessibility ===== */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--color-accent);
    color: var(--color-white);
    padding: 8px 16px;
    text-decoration: none;
    z-index: 100;
    border-radius: 0 0 4px 0;
}

.skip-link:focus {
    top: 0;
}

/* Focus styles for keyboard navigation */
*:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 2px;
    border-radius: 2px;
}

button:focus-visible,
a:focus-visible {
    outline: 2px solid var(--color-accent);
    outline-offset: 3px;
}

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

/* ===== Typography ===== */
h1, h2, h3, h4, h5, h6 {
    font-family: var(--font-family-heading);
    font-weight: 600;
    line-height: 1.2;
    letter-spacing: -0.02em;
}

h1 {
    font-size: var(--font-size-4xl);
}

h2 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-2xl);
}

h3 {
    font-size: var(--font-size-2xl);
}

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

a:hover {
    color: #16886f;
    text-decoration: underline;
}

/* ===== Header ===== */
.header {
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    position: sticky;
    top: 0;
    z-index: 999;
    padding: var(--spacing-lg) 0;
}

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

.header-left {
    flex: 1;
}

.site-title {
    font-size: var(--font-size-3xl);
    font-weight: 700;
    letter-spacing: -0.03em;
    margin-bottom: 4px;
}

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

.site-subtitle {
    font-size: var(--font-size-sm);
    color: var(--color-text-light);
    font-weight: 500;
}

/* ===== Navigation ===== */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    width: 32px;
    height: 32px;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
    color: var(--color-text);
}

.menu-icon-open,
.menu-icon-close {
    width: 24px;
    height: 24px;
    transition: var(--transition-fast);
}

.menu-icon-open {
    display: block;
}

.menu-icon-close {
    display: none;
}

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

.nav-list {
    display: none;
}

/* ===== Header Actions (Contact Buttons) ===== */
.header-actions {
    display: flex;
    gap: var(--spacing-sm);
    align-items: center;
}

.contact-btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: 8px 12px;
    color: var(--color-text);
    border-radius: 4px;
    font-size: var(--font-size-sm);
    font-weight: 500;
    transition: var(--transition-fast);
}

.contact-btn:hover {
   text-decoration: none;
}

.contact-btn svg {
    width: 18px;
    height: 18px;
    flex-shrink: 0;
}

.contact-btn.resume-btn {
    background-color: var(--color-accent);
    color: var(--color-white);
    border-color: var(--color-accent);
}

.contact-btn.resume-btn:hover {
    background-color: #16886f;
    border-color: #16886f;
}

/* ===== Main Content ===== */
main {
    flex: 1;
}

section {
    padding: var(--spacing-3xl) 0;
}

section h2 {
    font-size: var(--font-size-3xl);
    margin-bottom: var(--spacing-xl);
}

/* ===== Intro Section ===== */
.intro {
    background-color: var(--color-white);
}

.intro-title {
    margin-bottom: var(--spacing-sm);
}

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

.intro-wrapper {
    display: grid;
    grid-template-columns: 1fr auto;
    gap: var(--spacing-3xl);
    align-items: center;
}

.intro-content h2 {
    color: var(--color-text);
}

.intro-subtitle {
    font-size: var(--font-size-md);
    color: var(--color-text-light);
    font-weight: 500;
    margin-bottom: var(--spacing-lg);
}

.intro-text {
    font-size: var(--font-size-lg);
    line-height: 1.8;
    color: var(--color-text-light);
}

.intro-portrait {
    width: 250px;
    height: 250px;
    border-radius: 50%;
    overflow: hidden;
    flex-shrink: 0;
}

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

/* ===== Showcase Section ===== */
.showcase {
    background-color: var(--color-white);
}

.showcase-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: var(--spacing-xl);
}

.showcase-item {
    overflow: hidden;
    border-radius: 8px;
    aspect-ratio: 1;
    background-color: var(--color-white);
    border: 1px solid var(--color-border);
    position: relative;
    display: block;
}

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

.showcase-overlay {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background-color: rgba(31, 173, 159, 0.9);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transition: var(--transition-fast);
    color: var(--color-white);
    padding: var(--spacing-lg);
    text-align: center;
}

.showcase-overlay p {
    font-family: var(--font-family-heading);
    font-size: var(--font-size-xl);
    font-weight: 600;
    margin: 0;
}

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

.showcase-item:hover .showcase-overlay {
    opacity: 1;
}

.showcase-title-mobile {
    display: none;
}

.showcase-wrapper {
    display: contents;
}

/* ===== Skills Section ===== */
.skills {
    background-color: var(--color-light-gray);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: var(--spacing-lg);
    margin-top: var(--spacing-2xl);
}

.skill-category {
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: 8px;
    border: 1px solid var(--color-border);
}

.skill-category h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-lg);
    color: var(--color-text);
}

.skill-list {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-md);
}

.skill-list li {
    padding-left: var(--spacing-lg);
    position: relative;
    color: var(--color-text-light);
    font-weight: 500;
}

.skill-list li::before {
    content: '';
    position: absolute;
    left: 0;
    background-color: var(--color-accent);
    font-weight: bold;
    font-size: 1.2em;
    height: 5px;
    width: 5px;
    border-radius: 3px;
    top: 9px;
}

/* ===== Experience Section ===== */
.experience {
    background-color: var(--color-white);
}

.experience-list {
    margin-top: var(--spacing-2xl);
    position: relative;
    padding-left: var(--spacing-lg);
}

.experience-list::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 3px;
    background: linear-gradient(to bottom, var(--color-accent), transparent);
}

.experience-item {
    padding-bottom: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
    border-bottom: 1px solid var(--color-border);
    position: relative;
}

.experience-item::before {
    content: '';
    position: absolute;
    left: -30px;
    top: 4px;
    width: 10px;
    height: 10px;
    background-color: var(--color-accent);
    border: 3px solid var(--color-white);
    border-radius: 50%;
    box-shadow: 0 0 0 1px var(--color-border);
}

.experience-item:last-child {
    border-bottom: none;
    padding-bottom: 0;
    margin-bottom: 0;
}

.experience-header {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.experience-header h3 {
    font-size: var(--font-size-xl);
    margin-bottom: var(--spacing-sm);
}

.company {
    color: var(--color-accent);
    font-weight: 600;
    font-size: var(--font-size-sm);
}

.date {
    color: var(--color-text-light);
    font-size: var(--font-size-sm);
    white-space: nowrap;
    font-weight: 500;
}

.experience-details {
    list-style: none;
    padding-left: 0;
}

.experience-details li {
    padding-left: var(--spacing-lg);
    position: relative;
    margin-bottom: var(--spacing-md);
    color: var(--color-text-light);
    line-height: 1.7;
}

.experience-details li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: bold;
}

/* ===== Education Section ===== */
.education {
    background-color: var(--color-light-gray);
}

.education .container {
    display: grid;
    grid-template-columns: 1fr;
    align-items: start;
}

.education-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: var(--spacing-3xl);
    align-items: start;
}

.education-column h2 {
    margin-bottom: var(--spacing-xl);
}

.featured-work-column h2 {
    margin-bottom: var(--spacing-xl);
}

.education-item {
    background-color: var(--color-white);
    padding: var(--spacing-xl);
    border-radius: 8px;
    border: 1px solid var(--color-border);
    display: flex;
    align-items: center;
    gap: var(--spacing-xl);
}

.education-item h3 {
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-xl);
}

.education-logo {
    height: 194px;
    object-fit: contain;
    flex: 1;
}

.education-text {
    flex: 1;
}

.school {
    color: var(--color-accent);
    font-weight: 600;
    font-size: var(--font-size-sm);
}

/* ===== Footer ===== */
.footer {
    background-color: var(--color-dark-gray);
    color: var(--color-white);
    padding: var(--spacing-3xl) 0 var(--spacing-xl);
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: var(--spacing-2xl);
    margin-bottom: var(--spacing-2xl);
    padding-bottom: var(--spacing-2xl);
    border-bottom: 1px solid rgba(255, 255, 255, 0.1);
}

.footer-section h2,
.footer-section h3 {
    color: var(--color-white);
    margin-bottom: var(--spacing-md);
}

.footer-section p {
    color: rgba(255, 255, 255, 0.7);
    margin-bottom: var(--spacing-sm);
    font-size: var(--font-size-sm);
}

.location {
    color: var(--color-accent);
    font-weight: 500;
}

.footer-links {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.footer-links a {
    color: rgba(255, 255, 255, 0.7);
    font-size: var(--font-size-sm);
    transition: var(--transition-fast);
}

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

.footer-bottom {
    text-align: center;
    color: rgba(255, 255, 255, 0.5);
    font-size: var(--font-size-sm);
}

/* ===== Responsive Design ===== */
@media (max-width: 1200px) {
    .education-content {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 768px) {
    :root {
        --font-size-4xl: 36px;
        --font-size-3xl: 28px;
        --font-size-2xl: 22px;
        --spacing-3xl: 48px;
        --spacing-2xl: 32px;
    }

    .header-content {
        flex-direction: row;
        align-items: center;
        gap: var(--spacing-md);
    }

    .header-left {
        flex: 1;
    }

    .menu-toggle {
        display: flex;
    }

    .header-nav {
        position: absolute;
        top: 100%;
        left: 0;
        right: 0;
        width: 100%;
        background-color: var(--color-white);
        flex-direction: column;
        max-height: 0;
        overflow: hidden;
        transition: max-height 0.3s ease;
        box-shadow: 0 8px 16px rgba(0, 0, 0, 0.08);
    }

    .header-nav.active {
        max-height: 500px;
        border-top: 1px solid var(--color-border);
        border-bottom: 1px solid var(--color-border);
    }

    .header-actions {
        width: 100%;
        display: flex;
        flex-direction: column;
        padding: var(--spacing-md);
        gap: var(--spacing-sm);
    }

    .contact-btn {
        width: 100%;
        justify-content: center;
        gap: var(--spacing-sm);
    }

    .contact-btn {
        width: 100%;
        justify-content: center;
        gap: var(--spacing-sm);
    }

    .btn-text {
        display: inline;
    }

    section {
        padding: var(--spacing-2xl) 0;
    }

    .intro-wrapper {
        grid-template-columns: 1fr;
        gap: var(--spacing-2xl);
        align-items: start;
    }

    .intro-portrait {
        display: none;
    }

    section h2 {
        font-size: var(--font-size-2xl);
        margin-bottom: var(--spacing-xl);
    }

    .showcase-grid {
        grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
        gap: var(--spacing-lg);
    }

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

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

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

    .education-column h2 {
        margin-bottom: var(--spacing-xl);
    }

    .featured-work-column h2 {
        margin-bottom: var(--spacing-xl);
    }

    .experience-header {
        flex-direction: column;
        gap: var(--spacing-md);
    }

    .date {
        white-space: normal;
    }

    .footer-content {
        grid-template-columns: 1fr;
        gap: var(--spacing-lg);
        text-align: center;
    }

    .showcase-item {
        aspect-ratio: 1;
        overflow: hidden;
    }

    .showcase-overlay {
        display: none;
    }

    .showcase-title-mobile {
        display: block;
        font-size: var(--font-size-lg);
        margin-top: var(--spacing-md);
        margin-bottom: 0;
    }

    .showcase-wrapper {
        display: block;
    }

    .showcase-item:hover img {
        transform: scale(1);
    }

    .education-logo {
        display: none;
    }
}

@media (max-width: 480px) {
    :root {
        --font-size-4xl: 28px;
        --font-size-3xl: 22px;
        --font-size-2xl: 20px;
        --spacing-3xl: 32px;
        --spacing-2xl: 24px;
        --spacing-xl: 16px;
    }

    .container {
        padding: 0 var(--spacing-sm);
    }

    .header {
        padding: var(--spacing-md) 0;
    }

    .site-title {
        font-size: var(--font-size-xl);
    }

    .site-subtitle {
        font-size: 12px;
    }

    .contact-btn svg {
        width: 16px;
        height: 16px;
    }

    .contact-btn {
        padding: 6px 10px;
        font-size: 12px;
    }

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

    .experience-details li {
        margin-bottom: var(--spacing-sm);
    }

    .skill-category {
        padding: var(--spacing-lg);
    }
}