/* Import Modern Fonts */
@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800&display=swap');

/* CSS Custom Properties (Design System) */
:root {
    /* Colors */
    --color-bg-primary: #0a0a0a;
    --color-bg-secondary: #111111;
    --color-bg-tertiary: #1a1a1a;
    --color-bg-elevated: #222222;
    --color-text-primary: #ffffff;
    --color-text-secondary: #e0e0e0;
    --color-text-tertiary: #a0a0a0;
    --color-accent-primary: #ff6b35;
    --color-accent-secondary: #4ecdc4;
    --color-accent-tertiary: #45b7d1;
    --color-success: #10b981;
    --color-warning: #f59e0b;
    --color-error: #ef4444;
    
    /* Typography */
    --font-family-primary: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 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;
    --font-size-6xl: 3.75rem;
    
    /* Spacing */
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;
    --spacing-3xl: 4rem;
    --spacing-4xl: 6rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-base: 0 1px 3px 0 rgb(0 0 0 / 0.1), 0 1px 2px -1px rgb(0 0 0 / 0.1);
    --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);
    --shadow-2xl: 0 25px 50px -12px rgb(0 0 0 / 0.25);
    --shadow-glow: 0 0 20px rgb(255 107 53 / 0.3);
    
    /* Border Radius */
    --radius-sm: 0.25rem;
    --radius-base: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-xl: 1rem;
    --radius-2xl: 1.5rem;
    --radius-full: 50%;
    
    /* Transitions */
    --transition-fast: 150ms ease-in-out;
    --transition-base: 200ms ease-in-out;
    --transition-slow: 300ms ease-in-out;
}

/* General Styling */
* {
    box-sizing: border-box;
}

body {
    font-family: var(--font-family-primary);
    font-size: var(--font-size-base);
    line-height: 1.6;
    margin: 0;
    padding: 0;
    background: linear-gradient(135deg, var(--color-bg-primary) 0%, var(--color-bg-secondary) 100%);
    color: var(--color-text-secondary);
    font-weight: 400;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body.menu-open {
    overflow: hidden;
}

/* Header Styling */
header {
    background: rgba(17, 17, 17, 0.95);
    backdrop-filter: blur(12px);
    -webkit-backdrop-filter: blur(12px);
    padding: var(--spacing-md) var(--spacing-xl);
    box-shadow: var(--shadow-lg);
    position: fixed;
    width: 100%;
    top: 0;
    z-index: 1000;
    border-bottom: 1px solid rgba(255, 107, 53, 0.1);
}

header nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1200px;
    margin: 0 auto;
}

.nav-brand .logo {
    font-size: var(--font-size-xl);
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.nav-menu {
    display: flex;
    justify-content: center;
    align-items: center;
    list-style: none;
    margin: 0;
    padding: 0;
    gap: var(--spacing-lg);
}

.nav-menu li a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--font-size-sm);
    font-weight: 500;
    padding: var(--spacing-sm) var(--spacing-lg);
    transition: all var(--transition-base);
    border-radius: var(--radius-lg);
    position: relative;
    letter-spacing: 0.01em;
}

.nav-menu li a:hover,
.nav-menu li a.active {
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    color: var(--color-text-primary);
    transform: translateY(-1px);
    box-shadow: var(--shadow-glow);
}

.nav-menu li a.resume {
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    color: var(--color-text-primary);
    font-weight: 600;
}

.nav-menu li a.resume:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-xl);
}

/* Mobile Menu Toggle */
.mobile-menu-toggle {
    display: none;
    flex-direction: column;
    background: none;
    border: none;
    cursor: pointer;
    padding: var(--spacing-sm);
    gap: var(--spacing-xs);
}

.mobile-menu-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text-secondary);
    transition: all var(--transition-base);
    border-radius: var(--radius-sm);
}

.mobile-menu-toggle:hover span {
    background: var(--color-accent-primary);
}

.mobile-menu-toggle.active span:nth-child(1) {
    transform: rotate(45deg) translate(5px, 5px);
}

.mobile-menu-toggle.active span:nth-child(2) {
    opacity: 0;
}

.mobile-menu-toggle.active span:nth-child(3) {
    transform: rotate(-45deg) translate(7px, -6px);
}

/* Resume Section */
#resume {
    padding: var(--spacing-4xl) var(--spacing-xl);
    text-align: center;
    background: var(--color-bg-secondary);
    min-height: 100vh;
    position: relative;
    margin-top: 80px;
}

#resume::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(ellipse at center, rgba(69, 183, 209, 0.05) 0%, transparent 50%);
    pointer-events: none;
}

#resume h1 {
    font-size: var(--font-size-4xl);
    font-weight: 700;
    margin-bottom: var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    position: relative;
    z-index: 1;
    letter-spacing: -0.02em;
}

/* Download Button Styling */
.download-resume {
    text-align: center;
    margin-bottom: var(--spacing-3xl);
    position: relative;
    z-index: 1;
}

.download-button {
    background: linear-gradient(135deg, var(--color-success), var(--color-accent-secondary));
    color: var(--color-text-primary);
    padding: var(--spacing-lg) var(--spacing-2xl);
    border-radius: var(--radius-xl);
    text-decoration: none;
    font-size: var(--font-size-lg);
    font-weight: 600;
    font-family: var(--font-family-primary);
    transition: all var(--transition-base);
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-sm);
    box-shadow: var(--shadow-lg);
}

.download-button:hover {
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow), var(--shadow-xl);
}

.download-button::before {
    content: "⬇";
    font-size: var(--font-size-lg);
}

/* Resume Section Containers */
.resume-section {
    width: 100%;
    max-width: 900px;
    margin: 0 auto var(--spacing-3xl) auto;
    padding: var(--spacing-3xl);
    background: rgba(26, 26, 26, 0.8);
    backdrop-filter: blur(10px);
    -webkit-backdrop-filter: blur(10px);
    border-radius: var(--radius-2xl);
    box-shadow: var(--shadow-2xl);
    border: 1px solid rgba(255, 107, 53, 0.1);
    transition: all var(--transition-base);
    position: relative;
    z-index: 1;
    overflow: hidden;
}

.resume-section::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(78, 205, 196, 0.05), transparent);
    transition: all var(--transition-slow);
}

.resume-section:hover::before {
    left: 100%;
}

.resume-section:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-2xl);
    border-color: var(--color-accent-secondary);
}

.resume-section h2 {
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin-bottom: var(--spacing-xl);
    background: linear-gradient(135deg, var(--color-accent-primary), var(--color-accent-secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-align: left;
}

.resume-section p,
.resume-section ul {
    font-size: var(--font-size-lg);
    line-height: 1.7;
    color: var(--color-text-secondary);
    text-align: left;
}

.resume-section p {
    margin-bottom: var(--spacing-lg);
}

/* Enhanced List Styling */
.resume-section ul {
    list-style: none;
    padding-left: 0;
    display: grid;
    gap: var(--spacing-lg);
}

.resume-section ul li {
    padding: var(--spacing-lg);
    background: rgba(34, 34, 34, 0.6);
    border-radius: var(--radius-lg);
    border: 1px solid rgba(78, 205, 196, 0.2);
    position: relative;
    transition: all var(--transition-base);
    font-size: var(--font-size-base);
    color: var(--color-text-secondary);
    padding-left: var(--spacing-3xl);
}

.resume-section ul li::before {
    content: "✦";
    position: absolute;
    left: var(--spacing-lg);
    top: var(--spacing-lg);
    color: var(--color-accent-secondary);
    font-size: var(--font-size-lg);
    font-weight: 600;
}

.resume-section ul li:hover {
    transform: translateX(8px);
    background: rgba(34, 34, 34, 0.8);
    border-color: var(--color-accent-secondary);
    box-shadow: var(--shadow-md);
}

.resume-section ul li strong {
    color: var(--color-accent-primary);
    font-weight: 600;
    display: block;
    margin-bottom: var(--spacing-sm);
}

/* Links Styling */
.resume-section a {
    color: var(--color-accent-primary);
    text-decoration: none;
    font-weight: 500;
    transition: all var(--transition-base);
    border-bottom: 1px solid transparent;
}

.resume-section a:hover {
    color: var(--color-accent-secondary);
    border-bottom-color: var(--color-accent-secondary);
    transform: translateY(-1px);
}

/* Mobile Responsive Design */
@media (max-width: 768px) {
    header {
        padding: var(--spacing-md) var(--spacing-lg);
    }
    
    .mobile-menu-toggle {
        display: flex;
    }
    
    .nav-menu {
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: rgba(17, 17, 17, 0.98);
        backdrop-filter: blur(12px);
        -webkit-backdrop-filter: blur(12px);
        flex-direction: column;
        padding: var(--spacing-xl) 0;
        gap: var(--spacing-sm);
        box-shadow: var(--shadow-xl);
        border-top: 1px solid rgba(255, 107, 53, 0.1);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-base);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-menu li a {
        font-size: var(--font-size-base);
        padding: var(--spacing-lg) var(--spacing-xl);
        width: 100%;
        text-align: center;
        border-radius: 0;
    }
    
    #resume {
        padding: var(--spacing-3xl) var(--spacing-lg);
        margin-top: 100px;
    }
    
    #resume h1 {
        font-size: var(--font-size-3xl);
        margin-bottom: var(--spacing-lg);
    }
    
    .download-button {
        font-size: var(--font-size-base);
        padding: var(--spacing-md) var(--spacing-xl);
    }

    .resume-section {
        padding: var(--spacing-xl);
        margin-bottom: var(--spacing-xl);
    }
    
    .resume-section h2 {
        font-size: var(--font-size-xl);
        margin-bottom: var(--spacing-lg);
        text-align: center;
    }
    
    .resume-section p,
    .resume-section ul {
        font-size: var(--font-size-base);
        text-align: center;
    }
    
    .resume-section ul li {
        padding: var(--spacing-md);
        padding-left: var(--spacing-2xl);
        font-size: var(--font-size-sm);
    }
    
    .resume-section ul li::before {
        left: var(--spacing-md);
        top: var(--spacing-md);
    }
}

/* Footer Section */
footer {
    background: var(--color-bg-tertiary);
    padding: var(--spacing-2xl);
    text-align: center;
    border-top: 1px solid rgba(255, 107, 53, 0.1);
    margin-top: var(--spacing-4xl);
}

footer ul {
    list-style: none;
    padding: 0;
    margin: 0 0 var(--spacing-lg) 0;
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    flex-wrap: wrap;
}

footer ul li a {
    color: var(--color-text-secondary);
    text-decoration: none;
    font-size: var(--font-size-base);
    font-weight: 500;
    transition: all var(--transition-base);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--radius-base);
}

footer ul li a:hover {
    color: var(--color-accent-secondary);
    background: rgba(78, 205, 196, 0.1);
}

footer p {
    color: var(--color-text-tertiary);
    font-size: var(--font-size-sm);
    margin: 0;
}