/* ===========================
   CSS Variables - Slate Blue Theme
   =========================== */
:root {
    /* Colors */
    --color-bg: #FAFAF9;
    --color-text-primary: #1A1A1A;
    --color-text-secondary: #666666;
    --color-accent: #334155;
    --color-accent-light: #E2E8F0;
    --color-border: #E5E5E5;
    --color-white: #FFFFFF;

    /* Typography */
    --font-sans: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen', 'Ubuntu', sans-serif;
    --font-serif: 'Georgia', 'Times New Roman', serif;

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

    /* Layout */
    --max-width: 1200px;
    --border-radius: 8px;

    /* Transitions */
    --transition: all 0.3s ease;
}

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

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

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

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

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

/* ===========================
   Navigation
   =========================== */
.nav {
    position: fixed;
    top: 0;
    width: 100%;
    background-color: var(--color-white);
    border-bottom: 1px solid var(--color-border);
    z-index: 1000;
    transition: var(--transition);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--color-accent);
    letter-spacing: 0.05em;
}

.nav-logo:hover {
    opacity: 0.8;
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background-color: var(--color-accent);
    transition: width 0.3s ease;
}

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

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

/* ===========================
   Container & Layout
   =========================== */
.container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 2rem;
}

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

.section-alt {
    background-color: var(--color-white);
}

.section-title {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: var(--spacing-lg);
    position: relative;
    display: inline-block;
    padding-bottom: 0.5rem;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background-color: var(--color-accent);
    transform-origin: left;
    transform: scaleX(0);
    transition: transform 0.8s cubic-bezier(0.65, 0, 0.35, 1);
}

.section-title.animate-in::after {
    transform: scaleX(1);
}

/* ===========================
   Hero Section
   =========================== */
.hero {
    min-height: auto;
    display: flex;
    align-items: center;
    padding-top: 100px;
    padding-bottom: var(--spacing-sm);
}

.hero .container {
    display: grid;
    grid-template-columns: 1.5fr 0.8fr;
    gap: var(--spacing-lg);
    align-items: center;
}

.hero-content {
    animation: fadeInUp 0.8s ease;
}

.hero-name {
    font-size: 5rem;
    font-weight: 700;
    display: block;
    margin-bottom: var(--spacing-sm);
    color: var(--color-accent);
    line-height: 1.1;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-md);
    font-weight: 500;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: var(--spacing-md);
    max-width: 650px;
}

.hero-cta {
    display: flex;
    gap: 1rem;
    margin-top: var(--spacing-md);
}

.hero-image {
    animation: fadeIn 1s ease 0.3s both;
    max-width: 350px;
    margin-left: auto;
}

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

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

.btn-primary:hover {
    background-color: #475569;
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: transparent;
    color: var(--color-accent);
    border: 2px solid var(--color-accent);
}

.btn-secondary:hover {
    background-color: var(--color-accent);
    color: var(--color-white);
    transform: translateY(-2px);
}

/* ===========================
   Image Placeholder
   =========================== */

.image-placeholder {
    width: 100%;
    height: 100%;
    min-height: 300px;
    background: linear-gradient(135deg, var(--color-accent-light) 0%, var(--color-border) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: var(--border-radius);
    color: var(--color-text-secondary);
    font-style: italic;
}

.hero-image .image-placeholder {
    min-height: 350px;
    max-height: 400px;
}

/* ===========================
   Experience Grid
   =========================== */
.experience-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-md);
}

.experience-card {
    background-color: var(--color-white);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    display: block;
    position: relative;
    height: 350px;
}

.experience-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.card-image {
    width: 100%;
    height: 100%;
    overflow: hidden;
    position: relative;
    background-color: var(--color-white);
}

.card-image .image-placeholder {
    width: 100%;
    height: 100%;
    min-height: 100%;
    border-radius: 0;
    transition: var(--transition);
}

.card-image img.image-placeholder {
    object-fit: contain;
    display: block;
    background-color: var(--color-white);
}

.experience-card:hover .image-placeholder,
.project-card:hover .image-placeholder {
    filter: brightness(0.4);
}

.card-content {
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: center;
    text-align: center;
    opacity: 0;
    transition: var(--transition);
    z-index: 2;
}

.experience-card:hover .card-content,
.project-card:hover .card-content {
    opacity: 1;
}

.company-logo {
    position: absolute;
    top: 1rem;
    right: 1rem;
    width: 60px;
    height: 60px;
    object-fit: contain;
    background-color: rgba(255, 255, 255, 0.9);
    padding: 0.5rem;
    border-radius: 8px;
}

.card-title {
    font-size: 1.75rem;
    font-weight: 700;
    margin-bottom: var(--spacing-xs);
    color: var(--color-white);
    transition: var(--transition);
}

.card-meta {
    font-size: 1rem;
    color: var(--color-white);
    margin-bottom: var(--spacing-sm);
    font-style: italic;
    opacity: 0.9;
}

.card-description {
    color: var(--color-white);
    line-height: 1.6;
    margin-bottom: var(--spacing-sm);
    font-size: 0.95rem;
    max-width: 90%;
}

.card-link {
    display: none;
}

/* Hide cards beyond the first 3 */
.experience-card:nth-child(n+4) {
    display: none;
}

.experience-card.show {
    display: block;
}

/* View All Button */
.view-all-container {
    text-align: center;
    margin-top: var(--spacing-sm);
    margin-bottom: 0;
}

.view-all-container .btn {
    display: inline-block;
}

.view-all-container .btn.hidden {
    display: none;
}

/* ===========================
   Projects Grid
   =========================== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: var(--spacing-md);
}

.project-card {
    background-color: var(--color-white);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
    border: 1px solid transparent;
    cursor: pointer;
    text-decoration: none;
    display: block;
    position: relative;
    height: 350px;
}

.project-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
}

.project-card .card-image {
    width: 100%;
    height: 100%;
}

/* Show all project cards */

/* ===========================
   Contact Section
   =========================== */
.contact-content {
    max-width: 600px;
    margin: 0 auto;
    text-align: center;
}

.contact-description {
    font-size: 1.25rem;
    color: var(--color-text-secondary);
    margin-bottom: var(--spacing-lg);
    line-height: 1.6;
}

.contact-info {
    text-align: center;
    margin-top: var(--spacing-lg);
}

.contact-item {
    margin-bottom: var(--spacing-md);
}

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

.contact-item a {
    font-size: 1.25rem;
    color: var(--color-accent);
    font-weight: 600;
    transition: var(--transition);
}

.contact-item a:hover {
    text-decoration: underline;
    opacity: 0.8;
}

/* ===========================
   Footer
   =========================== */
.footer {
    background-color: var(--color-white);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-md) 0;
    text-align: center;
}

.footer p {
    color: var(--color-text-secondary);
    font-size: 0.95rem;
}

/* ===========================
   Animations
   =========================== */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

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

/* Load-in animations */
.fade-in-element {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

.fade-in-element.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Stagger animation for cards */
.experience-card,
.project-card {
    opacity: 0;
    transform: translateY(30px);
}

.experience-card.visible,
.project-card.visible {
    opacity: 1;
    transform: translateY(0);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

/* Override hover transform when animating in */
.experience-card:hover,
.project-card:hover {
    transform: translateY(-5px) !important;
}

/* ===========================
   Responsive Design
   =========================== */
@media (max-width: 768px) {
    .hero .container {
        grid-template-columns: 1fr;
    }

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

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

    .hero-image .image-placeholder {
        min-height: 300px;
    }

    .nav-menu {
        gap: 1.5rem;
    }

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

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

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

    .btn {
        text-align: center;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 1rem;
    }

    .nav-container {
        padding: 1rem;
    }

    .nav-menu {
        gap: 1rem;
        font-size: 0.85rem;
    }

    .hero-name {
        font-size: 2rem;
    }

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