/* ================================================
   PORTFOLIO WEBSITE - MAIN STYLESHEET
   Modern, premium design with glassmorphism & animations
   ================================================ */

/* ---------------- CSS CUSTOM PROPERTIES ---------------- */
:root {
    /* Colors - Modern Dark Blue/Indigo with Cyan accent */
    --color-primary: #4F46E5;
    --color-primary-dark: #4338CA;
    --color-primary-light: #6366F1;
    --color-accent: #06B6D4;
    --color-accent-dark: #0891B2;

    /* Neutrals */
    --color-bg: #0F172A;
    --color-bg-light: #1E293B;
    --color-bg-lighter: #334155;
    --color-text: #F1F5F9;
    --color-text-muted: #94A3B8;
    --color-border: #334155;

    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-accent) 100%);
    --gradient-card: linear-gradient(135deg, rgba(79, 70, 229, 0.1) 0%, rgba(6, 182, 212, 0.1) 100%);

    /* Typography */
    --font-primary: 'Inter', 'Segoe UI', system-ui, sans-serif;
    --font-heading: 'Poppins', 'Inter', sans-serif;

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

    /* Effects */
    --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 32px rgba(0, 0, 0, 0.2);
    --shadow-glow: 0 0 20px rgba(79, 70, 229, 0.3);

    --border-radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ---------------- GLOBAL RESETS & BASE STYLES ---------------- */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-primary);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.7;
    font-size: 16px;
    overflow-x: hidden;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-heading);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: var(--spacing-sm);
}

h1 {
    font-size: clamp(2.5rem, 5vw, 4rem);
}

h2 {
    font-size: clamp(2rem, 4vw, 3rem);
}

h3 {
    font-size: clamp(1.5rem, 3vw, 2rem);
}

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

a:hover {
    color: var(--color-accent-dark);
}

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

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

.section {
    padding: var(--spacing-2xl) 0;
    position: relative;
}

.section-header {
    text-align: center;
    margin-bottom: var(--spacing-xl);
}

.section-title {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
    margin-bottom: var(--spacing-sm);
}

.section-subtitle {
    color: var(--color-text-muted);
    font-size: 1.125rem;
}

/* ---------------- NAVIGATION ---------------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(15, 23, 42, 0.8);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--color-border);
    padding: var(--spacing-sm) 0;
    transition: var(--transition);
}

.navbar.scrolled {
    background: rgba(15, 23, 42, 0.95);
    box-shadow: var(--shadow-md);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.nav-logo {
    font-size: 1.5rem;
    font-weight: 700;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    background-clip: text;
    -webkit-text-fill-color: transparent;
}

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

.nav-link {
    color: var(--color-text);
    font-weight: 500;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius);
    transition: var(--transition);
    position: relative;
}

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width 0.3s ease;
}

.nav-link:hover::after,
.nav-link.active::after {
    width: 80%;
}

/* Mobile menu toggle */
.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--color-text);
    font-size: 1.5rem;
    cursor: pointer;
}

/* ---------------- BUTTONS ---------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.6rem 1.35rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    text-align: center;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    font-size: 0.9rem;
    text-decoration: none;
}

.btn-sm {
    padding: 0.4rem 0.85rem;
    font-size: 0.825rem;
    border-radius: 6px;
}

.btn-lg {
    padding: 0.75rem 1.75rem;
    font-size: 0.975rem;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
    color: white;
}

.btn-outline {
    background: transparent;
    border: 1.5px solid var(--color-primary);
    color: var(--color-primary);
}

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

/* ---------------- HERO SECTION ---------------- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    text-align: center;
    position: relative;
    overflow: hidden;
    padding-top: 80px;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: radial-gradient(circle at 30% 50%, rgba(79, 70, 229, 0.15) 0%, transparent 50%),
        radial-gradient(circle at 70% 50%, rgba(6, 182, 212, 0.15) 0%, transparent 50%);
    pointer-events: none;
}

.hero-content {
    position: relative;
    z-index: 1;
}

.hero-title {
    margin-bottom: var(--spacing-md);
    animation: fadeInUp 0.8s ease;
}

.hero-subtitle {
    font-size: clamp(1.25rem, 2.5vw, 1.75rem);
    color: var(--color-text-muted);
    margin-bottom: var(--spacing-xl);
    animation: fadeInUp 0.8s ease 0.2s both;
}

.hero-buttons {
    display: flex;
    gap: var(--spacing-md);
    justify-content: center;
    flex-wrap: wrap;
    animation: fadeInUp 0.8s ease 0.4s both;
}

/* ---------------- GLASSMORPHISM CARDS ---------------- */
.glass-card {
    background: rgba(30, 41, 59, 0.6);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    padding: var(--spacing-lg);
    transition: var(--transition);
}

.glass-card:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(79, 70, 229, 0.5);
}

/* ---------------- GRID LAYOUTS ---------------- */
.grid {
    display: grid;
    gap: var(--spacing-lg);
}

.grid-2 {
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
}

.grid-3 {
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
}

/* ---------------- SKILL BARS ---------------- */
.skill-item {
    margin-bottom: var(--spacing-md);
}

.skill-header {
    display: flex;
    justify-content: space-between;
    margin-bottom: var(--spacing-xs);
}

.skill-bar {
    height: 12px;
    background: var(--color-bg-light);
    border-radius: 10px;
    overflow: hidden;
    position: relative;
}

.skill-progress {
    height: 100%;
    background: var(--gradient-primary);
    border-radius: 10px;
    transition: width 1.5s ease;
    box-shadow: 0 0 10px rgba(79, 70, 229, 0.5);
}

/* ---------------- PROJECT CARDS ---------------- */
.project-card {
    position: relative;
    overflow: hidden;
    border-radius: var(--border-radius);
}

.project-image {
    width: 100%;
    height: 250px;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.project-card:hover .project-image {
    transform: scale(1.1);
}

.project-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    background: linear-gradient(to top, rgba(15, 23, 42, 0.95), transparent);
    padding: var(--spacing-lg);
    transform: translateY(60%);
    transition: var(--transition);
}

.project-card:hover .project-overlay {
    transform: translateY(0);
}

.project-tags {
    display: flex;
    gap: var(--spacing-xs);
    flex-wrap: wrap;
    margin-top: var(--spacing-sm);
}

.tag {
    padding: 0.25rem 0.75rem;
    background: rgba(79, 70, 229, 0.2);
    border: 1px solid var(--color-primary);
    border-radius: 20px;
    font-size: 0.875rem;
    color: var(--color-accent);
}

/* ---------------- FOOTER ---------------- */
.footer {
    background: var(--color-bg-light);
    border-top: 1px solid var(--color-border);
    padding: var(--spacing-xl) 0 var(--spacing-md);
    text-align: center;
}

.social-links {
    display: flex;
    justify-content: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-md);
}

.social-link {
    width: 40px;
    height: 40px;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--color-bg-lighter);
    border-radius: 50%;
    transition: var(--transition);
}

.social-link:hover {
    background: var(--gradient-primary);
    transform: translateY(-4px);
}

/* ---------------- ANIMATIONS ---------------- */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }

    to {
        opacity: 1;
        transform: translateY(0);
    }
}

[data-aos] {
    transition-duration: 0.8s;
}

/* ---------------- RESPONSIVE ---------------- */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        background: rgba(15, 23, 42, 0.98);
        flex-direction: column;
        padding: var(--spacing-lg);
        transform: translateX(-100%);
        transition: transform 0.3s ease;
    }

    .nav-menu.active {
        transform: translateX(0);
    }

    .menu-toggle {
        display: block;
    }

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

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

/* ---------------- HERO ENHANCEMENTS ---------------- */
.hero-badge {
    display: inline-block;
    padding: 0.5rem 1.5rem;
    background: rgba(79, 70, 229, 0.1);
    border: 1px solid rgba(79, 70, 229, 0.3);
    border-radius: 50px;
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
    backdrop-filter: blur(10px);
}

.hero-badge span {
    margin-right: 0.5rem;
}

.scroll-indicator {
    position: absolute;
    bottom: 2rem;
    left: 50%;
    transform: translateX(-50%);
    text-align: center;
    color: var(--color-text-muted);
    font-size: 0.875rem;
}

.scroll-arrow {
    margin-top: 0.5rem;
    animation: bounce 2s infinite;
}

@keyframes bounce {

    0%,
    20%,
    50%,
    80%,
    100% {
        transform: translateY(0);
    }

    40% {
        transform: translateY(-10px);
    }

    60% {
        transform: translateY(-5px);
    }
}

/* ---------------- STATS SECTION ---------------- */
.stats-section {
    padding: var(--spacing-xl) 0;
    background: rgba(30, 41, 59, 0.4);
    backdrop-filter: blur(10px);
}

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--spacing-lg);
}

.stat-box {
    text-align: center;
    padding: var(--spacing-lg);
}

.stat-number {
    font-size: clamp(2.5rem, 5vw, 3.5rem);
    font-weight: 800;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    color: transparent;
    line-height: 1;
    margin-bottom: var(--spacing-xs);
}

.stat-label {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

/* ---------------- TECH STACK SECTION ---------------- */
.tech-stack-section {
    background: linear-gradient(180deg, transparent 0%, rgba(30, 41, 59, 0.3) 100%);
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    gap: var(--spacing-md);
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-md);
    background: rgba(30, 41, 59, 0.4);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    transition: var(--transition);
}

.tech-item:hover {
    transform: translateY(-4px);
    border-color: var(--color-primary);
    background: rgba(79, 70, 229, 0.1);
}

.tech-icon {
    font-size: 2.5rem;
    line-height: 1;
}

.tech-item span {
    font-size: 0.875rem;
    font-weight: 500;
    text-align: center;
}

/* ---------------- ENHANCED PROJECT CARDS ---------------- */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(320px, 1fr));
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.project-card-enhanced {
    background: rgba(30, 41, 59, 0.5);
    border: 1px solid rgba(255, 255, 255, 0.1);
    border-radius: var(--border-radius);
    overflow: hidden;
    transition: var(--transition);
}

.project-card-enhanced:hover {
    transform: translateY(-8px);
    box-shadow: var(--shadow-lg);
    border-color: rgba(79, 70, 229, 0.5);
}

.project-image-wrapper {
    position: relative;
    overflow: hidden;
    height: 220px;
}

.project-image-wrapper img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.project-card-enhanced:hover .project-image-wrapper img {
    transform: scale(1.1);
}

.project-placeholder {
    width: 100%;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: center;
    background: var(--gradient-card);
}

.project-category-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    padding: 0.375rem 0.875rem;
    background: rgba(79, 70, 229, 0.9);
    backdrop-filter: blur(10px);
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

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

.project-title {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-xs);
}

.project-description {
    color: var(--color-text-muted);
    font-size: 0.875rem;
    line-height: 1.6;
    margin-bottom: var(--spacing-md);
}

.project-tech-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: var(--spacing-md);
}

.tech-tag {
    padding: 0.25rem 0.75rem;
    background: rgba(6, 182, 212, 0.1);
    border: 1px solid rgba(6, 182, 212, 0.3);
    border-radius: 12px;
    font-size: 0.75rem;
    color: var(--color-accent);
    font-weight: 500;
}

.project-actions {
    display: flex;
    gap: var(--spacing-sm);
}

.project-link {
    flex: 1;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    padding: 0.625rem 1rem;
    background: rgba(79, 70, 229, 0.1);
    border: 1px solid var(--color-primary);
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    transition: var(--transition);
}

.project-link:hover {
    background: var(--color-primary);
    transform: translateY(-2px);
}

/* ---------------- EMPTY STATE ---------------- */
.empty-state {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-md);
}

.empty-state h3 {
    margin-bottom: var(--spacing-sm);
}

/* ---------------- BUTTON ENHANCEMENTS ---------------- */
.btn-lg {
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
}

/* ---------------- UTILITY CLASSES ---------------- */
.text-center {
    text-align: center;
}

.text-muted {
    color: var(--color-text-muted);
}

.mt-1 {
    margin-top: var(--spacing-sm);
}

.mt-2 {
    margin-top: var(--spacing-md);
}

.mt-3 {
    margin-top: var(--spacing-lg);
}

.mb-1 {
    margin-bottom: var(--spacing-sm);
}

.mb-2 {
    margin-bottom: var(--spacing-md);
}

.mb-3 {
    margin-bottom: var(--spacing-lg);
}