/* ========================================
   CSS Variables
   ======================================== */
:root {
    --primary-color: #0066CC;
    --text-color: #333333;
    --light-text-color: #666666;
    --bg-color: #FFFFFF;
    --dark-bg-color: #1A1A1A;
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 2rem;
    --spacing-lg: 4rem;
    --spacing-xl: 6rem;
    --font-primary: 'Montserrat', sans-serif;
    --font-secondary: 'Open Sans', sans-serif;
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 24px rgba(0, 0, 0, 0.2);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-secondary);
    color: var(--text-color);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

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

/* ========================================
   Header
   ======================================== */
.header {
    background: var(--bg-color);
    box-shadow: var(--shadow-sm);
    padding: var(--spacing-md) 0;
}

.logo {
    font-family: var(--font-primary);
    font-size: 1.8rem;
    font-weight: 700;
    color: var(--primary-color);
    margin: 0;
}

/* ========================================
   Section Styles
   ======================================== */
.section-header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
}

.section-title {
    font-family: var(--font-primary);
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-color);
    margin-bottom: var(--spacing-sm);
}

.section-description {
    font-size: 1.2rem;
    color: var(--light-text-color);
}

/* ========================================
   Projects Section
   ======================================== */
.projects {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: var(--spacing-xl) 0;
    flex: 1;
}

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

.project-card {
    background: white;
    border-radius: 16px;
    overflow: hidden;
    box-shadow: var(--shadow-md);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
}

.project-image {
    height: 280px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, #e8f4f8 0%, #d4e9f0 100%);
    padding: var(--spacing-md);
}

.project-image img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    transition: transform 0.3s ease;
}

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

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

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

.project-description {
    font-size: 1rem;
    color: var(--light-text-color);
    line-height: 1.7;
    margin-bottom: var(--spacing-md);
}

.project-features {
    list-style: none;
}

.project-features li {
    padding: var(--spacing-xs) 0;
    padding-left: 1.5rem;
    position: relative;
    color: var(--text-color);
    font-size: 0.95rem;
}

.project-features li::before {
    content: "\2713";
    position: absolute;
    left: 0;
    color: var(--primary-color);
    font-weight: bold;
}

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

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

    .project-image {
        height: 220px;
    }

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

    .logo {
        font-size: 1.5rem;
    }
}