/* ===================================
   MODERN DESIGN SYSTEM (Shared)
   =================================== */

:root {
    /* Color Palette - Modern & Vibrant */
    --color-primary: #6366f1;
    --color-primary-light: #818cf8;
    --color-primary-dark: #4f46e5;
    --color-secondary: #06b6d4;
    --color-accent: #f59e0b;
    --color-success: #10b981;
    --color-danger: #ef4444;

    /* Neutral Colors */
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f8fafc;
    --color-bg-tertiary: #f1f5f9;
    --color-bg-dark: #0f172a;
    --color-text-primary: #0f172a;
    --color-text-secondary: #475569;
    --color-text-tertiary: #94a3b8;
    --color-border: #e2e8f0;

    /* Spacing System */
    --space-xs: 0.5rem;
    --space-sm: 0.75rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
    --space-3xl: 4rem;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-base: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.875rem;
    --font-size-4xl: 2.25rem;
    --font-size-5xl: 3rem;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);
    --shadow-xl: 0 20px 25px -5px rgb(0 0 0 / 0.1), 0 8px 10px -6px rgb(0 0 0 / 0.1);

    /* Border Radius */
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 9999px;

    /* Transitions */
    --transition-fast: 150ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-base: 300ms cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: 500ms cubic-bezier(0.4, 0, 0.2, 1);
}

/* Dark Mode */
@media (prefers-color-scheme: dark) {
    :root {
        --color-bg-primary: #0f172a;
        --color-bg-secondary: #1e293b;
        --color-bg-tertiary: #334155;
        --color-bg-dark: #020617;
        --color-text-primary: #f8fafc;
        --color-text-secondary: #cbd5e1;
        --color-text-tertiary: #64748b;
        --color-border: #334155;
    }
}

/* Light Mode Enhancements */
body.light-mode .project-card {
    border: 2px solid #cbd5e1;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
}

body.light-mode .project-card:hover {
    border-color: var(--color-primary);
    box-shadow: 0 8px 24px rgba(99, 102, 241, 0.15);
}

body.light-mode .tech-tag {
    border: 2px solid #cbd5e1;
    background: #ffffff;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.05);
}

body.light-mode .tech-tag:hover {
    border-color: var(--color-primary);
    background: var(--color-primary);
    box-shadow: 0 2px 6px rgba(99, 102, 241, 0.2);
}

body.light-mode .project-link {
    background: var(--color-bg-secondary);
    border-color: var(--color-primary);
    box-shadow: 0 2px 8px rgba(99, 102, 241, 0.1);
}

body.light-mode .project-link:hover {
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
}

body.light-mode .project-icon {
    box-shadow: 0 4px 12px rgba(99, 102, 241, 0.2);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-sans);
    font-size: var(--font-size-base);
    line-height: 1.6;
    color: var(--color-text-primary);
    background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
    min-height: 100vh;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    padding: 0 var(--space-xs);
}

/* ===================================
   NAVIGATION & HEADER
   =================================== */

/* Hero Image Styles */
.hero-image-container {
    position: relative;
    padding: 0;
    margin: 0 auto;
    border-radius: var(--radius-2xl);
    overflow: hidden;
    box-shadow: var(--shadow-xl);
    max-width: 600px;
    max-height: 500px;
}

.hero-image {
    width: 100%;
    height: 100%;
    max-height: 500px;
    display: block;
    border-radius: var(--radius-2xl);
    object-fit: cover;
    object-position: center 20%;
}

@media (max-width: 968px) {
    .hero-image-container {
        max-height: 400px;
    }
    .hero-image {
        max-height: 400px;
        object-position: center 25%;
    }
}

.hero-image-overlay {
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.3) 0%, rgba(6, 182, 212, 0.3) 100%);
    border-radius: var(--radius-2xl);
}

/* ===================================
   CONTENT
   =================================== */

.container {
    max-width: 1280px;
    margin: 0 auto;
    padding: var(--space-3xl) var(--space-lg);
    animation: fadeIn 0.6s ease-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

.header {
    text-align: center;
    margin-bottom: var(--space-3xl);
    padding: var(--space-2xl) 0;
}

.header h1 {
    font-size: var(--font-size-5xl);
    font-weight: 800;
    margin-bottom: var(--space-md);
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    line-height: 1.2;
}

.header p {
    font-size: var(--font-size-xl);
    color: var(--color-text-secondary);
    font-weight: 500;
}

/* ===================================
   PROJECTS GRID
   =================================== */

.projects-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: var(--space-xl);
    margin-top: var(--space-3xl);
}

@media (max-width: 1024px) {
    .projects-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

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

.project-card {
    background: var(--color-bg-primary);
    border-radius: var(--radius-xl);
    padding: var(--space-xl);
    box-shadow: var(--shadow-lg);
    border: 1px solid var(--color-border);
    transition: all var(--transition-base);
    animation: slideUp 0.6s ease-out backwards;
    display: flex;
    flex-direction: column;
    height: 100%;
}

.project-card:nth-child(1) { animation-delay: 0.1s; }
.project-card:nth-child(2) { animation-delay: 0.2s; }
.project-card:nth-child(3) { animation-delay: 0.3s; }
.project-card:nth-child(4) { animation-delay: 0.4s; }
.project-card:nth-child(5) { animation-delay: 0.5s; }
.project-card:nth-child(6) { animation-delay: 0.6s; }

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

.project-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-xl);
    border-color: var(--color-primary);
}

.project-icon {
    width: 64px;
    height: 64px;
    background: linear-gradient(135deg, var(--color-primary), var(--color-secondary));
    border-radius: var(--radius-lg);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: var(--space-lg);
    font-size: var(--font-size-2xl);
    color: white;
}

.project-title {
    font-size: var(--font-size-xl);
    font-weight: 700;
    margin-bottom: var(--space-md);
    color: var(--color-text-primary);
}

.project-description {
    color: var(--color-text-secondary);
    margin-bottom: var(--space-lg);
    flex-grow: 1;
    line-height: 1.7;
}

.tech-stack {
    display: flex;
    flex-wrap: wrap;
    gap: var(--space-xs);
    margin-bottom: var(--space-lg);
}

.tech-tag {
    padding: var(--space-xs) var(--space-md);
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-full);
    font-size: var(--font-size-xs);
    font-weight: 600;
    color: var(--color-primary);
    border: 1px solid var(--color-border);
    transition: all var(--transition-fast);
}

.tech-tag:hover {
    background: var(--color-primary);
    color: white;
    transform: scale(1.05);
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-primary);
    text-decoration: none;
    font-weight: 600;
    font-size: var(--font-size-sm);
    transition: all var(--transition-base);
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-lg);
    background: var(--color-bg-secondary);
    border: 2px solid var(--color-primary);
    justify-content: center;
}

.project-link:hover {
    background: var(--color-primary);
    color: white;
    transform: translateX(4px);
}

@media (max-width: 768px) {
    .header h1 {
        font-size: var(--font-size-4xl);
    }

    .header p {
        font-size: var(--font-size-lg);
    }

    .container {
        padding: var(--space-xl) var(--space-md);
    }

    .project-card {
        padding: var(--space-lg);
    }
}