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

:root {
    --bg-color: #ffffff;
    --text-primary: #1a1a1a;
    --text-secondary: #666666;
    --accent-color: #000000;
    --border-color: #e0e0e0;
    --font-serif: 'Playfair Display', Georgia, serif;
    --font-sans: 'Inter', -apple-system, sans-serif;
    --card-bg: #ffffff;
    --nav-bg: rgba(255, 255, 255, 0.95);
    transition: background-color 0.3s ease, color 0.3s ease;
}

/* Dark mode colors */
[data-theme="dark"] {
    --bg-color: #0a0a0a;
    --text-primary: #e0e0e0;
    --text-secondary: #a0a0a0;
    --accent-color: #ffffff;
    --border-color: #2a2a2a;
    --card-bg: #151515;
    --nav-bg: rgba(10, 10, 10, 0.95);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    color: var(--text-primary);
    line-height: 1.7;
    position: relative;
    background: var(--bg-color);
}

/* =====================================
   Animated Flower Background Canvas
   ===================================== */
#flowerCanvas {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
    opacity: 0.6;
}

/* =====================================
   Navigation (Clarissa Wei style)
   ===================================== */
.navbar {
    position: fixed;
    top:0;
    left: 0;
    right: 0;
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 100;
    padding: 1.5rem 0;
}

.nav-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    text-decoration: none;
    transition: opacity 0.3s ease;
}

.nav-logo:hover {
    opacity: 0.7;
}

.nav-menu {
    list-style: none;
    display: flex;
    gap: 2.5rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    font-size: 0.95rem;
    transition: color 0.3s ease;
}

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

/* Hamburger Menu */
.hamburger {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
}

.hamburger span {
    display: block;
    width: 25px;
    height: 2px;
    background: var(--text-primary);
    transition: all 0.3s ease;
}

.hamburger.active span:nth-child(1) {
    transform: rotate(45deg) translate(7px, 7px);
}

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

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

/* Floating Theme Toggle Button */
.theme-toggle {
    position: fixed;
    bottom: 2rem;
    right: 2rem;
    width: 50px;
    height: 50px;
    border-radius: 50%;
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s ease;
    z-index: 999;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.theme-toggle:hover {
    transform: scale(1.1);
    border-color: var(--text-primary);
}

.theme-toggle .sun-icon {
    display: block;
    color: var(--text-primary);
}

.theme-toggle .moon-icon {
    display: none;
    color: var(--text-primary);
}

.theme-toggle.dark .sun-icon {
    display: none;
}

.theme-toggle.dark .moon-icon {
    display: block;
}

/* =====================================
   Main Container
   ===================================== */
.main-container {
    max-width: 800px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* =====================================
   Hero Section
   ===================================== */
.hero-section {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 8rem 0 4rem;
}

.hero-title {
    font-family: var(--font-serif);
    font-size: clamp(3rem, 8vw, 5rem);
    font-weight: 600;
    line-height: 1.1;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.hero-subtitle {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-weight: 400;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    line-height: 1.8;
}

/* =====================================
   Sections
   ===================================== */
.section {
    padding: 5rem 0;
    border-top: 1px solid var(--border-color);
}

.section-title {
    font-family: var(--font-serif);
    font-size: 2rem;
    font-weight: 600;
    margin-bottom: 2.5rem;
    color: var(--text-primary);
}

.section-content {
    color: var(--text-secondary);
    font-size: 1.05rem;
    line-height: 1.8;
}

.section-content p {
    margin-bottom: 1.5rem;
}

.section-content strong {
    color: var(--text-primary);
}

/* =====================================
   Work Section
   ===================================== */
.work-item {
    margin-bottom: 3rem;
}

.work-item:last-child {
    margin-bottom: 0;
}

.work-header {
    margin-bottom: 1rem;
}

.work-title {
    font-family: var(--font-serif);
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.work-company {
    display: block;
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.work-meta {
    display: block;
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.25rem;
}

.work-date {
    display: block;
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-style: italic;
}

.work-details {
    list-style: none;
    padding-left: 0;
    margin-top: 1rem;
}

.work-details li {
    position: relative;
    padding-left: 1.5rem;
    margin-bottom: 0.75rem;
    color: var(--text-secondary);
}

.work-details li::before {
    content: '—';
    position: absolute;
    left: 0;
    color: var(--text-secondary);
}

/* =====================================
   About Section - Metrics Grid
   ===================================== */
.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 3rem;
}

.metric-card {
    text-align: center;
    padding: 2rem 1rem;
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.metric-card:hover {
    transform: translateY(-5px);
    border-color: var(--text-primary);
}

.metric-number {
    font-family: var(--font-serif);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.metric-label {
    font-size: 1rem;
    color: var(--text-primary);
    font-weight: 500;
    margin-bottom: 0.25rem;
}

.metric-detail {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

/* =====================================
   Projects Section
   ===================================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
    margin-top: 2rem;
}

.project-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 2rem;
    border-radius: 4px;
    transition: transform 0.3s ease, border-color 0.3s ease;
}

.project-card:hover {
    transform: translateY(-5px);
    border-color: var(--text-primary);
}

.project-card h3 {
    font-family: var(--font-serif);
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 1rem;
}

.project-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
    margin-bottom: 1.5rem;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.tag {
    background: #f5f5f5;
    color: var(--text-secondary);
    padding: 0.25rem 0.75rem;
    border-radius: 12px;
    font-size: 0.8rem;
    border: 1px solid var(--border-color);
}

.project-link {
    color: var(--text-primary);
    text-decoration: none;
    font-size: 0.9rem;
    font-weight: 500;
    transition: opacity 0.3s ease;
}

.project-link:hover {
    opacity: 0.6;
}

/* =====================================
   Skills Section
   ===================================== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
    margin-top: 1.5rem;
}

.skill-category h3 {
    font-family: var(--font-serif);
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.skill-category p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    line-height: 1.6;
}

/* ====================================
   Resume Section
   ===================================== */
.resume-intro {
    margin-bottom: 2rem;
    text-align: center;
}

.resume-actions {
    display: flex;
    justify-content: center;
}

.resume-button {
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--text-primary);
    color: var(--bg-color);
    padding: 1rem 2rem;
    border-radius: 6px;
    text-decoration: none;
    font-size: 1.05rem;
    font-weight: 500;
    transition: all 0.3s ease;
    border: 2px solid var(--text-primary);
}

.resume-button:hover {
    background: transparent;
    color: var(--text-primary);
    transform: translateY(-2px);
}

.resume-button svg {
    width: 20px;
    height: 20px;
}

/* ====================================
   Contact Section
   ===================================== */
.contact-intro {
    margin-bottom: 2rem;
}

.contact-links {
    display: flex;
    gap: 2rem;
    flex-wrap: wrap;
}

.contact-link {
    color: var(--text-primary);
    text-decoration: underline;
    font-size: 1.05rem;
    transition: opacity 0.3s ease;
}

.contact-link:hover {
    opacity: 0.6;
}



/* =====================================
   Footer
   ===================================== */
.footer {
    padding: 3rem 0;
    border-top: 1px solid var(--border-color);
    margin-top: 5rem;
    text-align: center;
}

.footer p {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

/* =====================================
   Responsive Design
   ===================================== */
@media (max-width: 768px) {
    .hamburger {
        display: flex;
        order: 2;
    }

    .nav-menu {
        position: fixed;
        left: -100%;
        top: 75px;
        flex-direction: column;
        background-color: var(--nav-bg);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        box-shadow: 0 10px 27px rgba(0, 0, 0, 0.05);
        padding: 2rem 0;
        gap: 1rem;
    }

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

    .dark-mode-toggle-container {
        justify-content: center;
        margin-top: 1rem;
    }

    .hero-section {
        padding: 6rem 0 3rem;
    }

    .section {
        padding: 3rem 0;
    }

    .skills-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .contact-links {
        flex-direction: column;
        gap: 1rem;
    }
}

@media (max-width: 480px) {
    .nav-container {
        padding: 0 1.5rem;
    }

    .main-container {
        padding: 0 1.5rem;
    }

    .nav-menu {
        gap: 1rem;
    }

    .nav-link {
        font-size: 0.85rem;
    }
}