/* Variables */
:root {
    --primary: #2563eb;
    --primary-hover: #1d4ed8;
    --primary-light: #dbeafe;
    --accent: #06b6d4;
    --bg-body: #f8fafc;
    --bg-card: #ffffff;
    --bg-alt: #f1f5f9;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --border: #e2e8f0;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.1);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.1), 0 2px 4px -1px rgba(0,0,0,0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.1), 0 4px 6px -2px rgba(0,0,0,0.05);
    --radius: 12px;
    --transition: all 0.3s ease;
}

[data-theme="dark"] {
    --primary: #3b82f6;
    --primary-hover: #60a5fa;
    --primary-light: #1e293b;
    --accent: #22d3ee;
    --bg-body: #0f172a;
    --bg-card: #1e293b;
    --bg-alt: #172554;
    --text-main: #f8fafc;
    --text-muted: #94a3b8;
    --border: #334155;
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.5);
    --shadow-md: 0 4px 6px -1px rgba(0,0,0,0.4);
    --shadow-lg: 0 10px 15px -3px rgba(0,0,0,0.5);
}

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

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-body);
    color: var(--text-main);
    line-height: 1.6;
    transition: background-color 0.3s, color 0.3s;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Typography */
h1, h2, h3, h4 {
    font-weight: 700;
    color: var(--text-main);
}

.gradient-text {
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

/* Navbar */
.navbar {
    position: sticky;
    top: 0;
    background-color: rgba(255, 255, 255, 0.85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border);
    z-index: 1000;
    transition: var(--transition);
}

[data-theme="dark"] .navbar {
    background-color: rgba(15, 23, 42, 0.85);
}

.nav-container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    max-width: 1100px;
    margin: 0 auto;
    padding: 15px 20px;
}

.logo {
    font-size: 1.5rem;
    font-weight: 800;
    color: var(--text-main);
    text-decoration: none;
}

.logo span {
    color: var(--primary);
}

.nav-links {
    display: flex;
    list-style: none;
    gap: 20px;
    align-items: center;
}

.nav-links a {
    text-decoration: none;
    color: var(--text-muted);
    font-weight: 500;
    transition: var(--transition);
    padding: 5px 10px;
    border-radius: 6px;
}

.nav-links a:hover, .nav-links a.active {
    color: var(--primary);
}

.highlight-link {
    background: var(--primary-light);
    color: var(--primary) !important;
    font-weight: 600 !important;
}

.highlight-link:hover {
    background: var(--primary);
    color: #fff !important;
}

.theme-toggle {
    cursor: pointer;
    font-size: 1.2rem;
    color: var(--text-muted);
    padding: 8px;
    border-radius: 50%;
    transition: var(--transition);
}

.theme-toggle:hover {
    color: var(--primary);
    background: var(--bg-alt);
}

.hamburger {
    display: none;
    flex-direction: column;
    gap: 4px;
    cursor: pointer;
}

.hamburger span {
    width: 25px;
    height: 3px;
    background-color: var(--text-main);
    border-radius: 2px;
    transition: var(--transition);
}

/* Hero Section */
.hero-section {
    padding: 80px 0 60px;
}

.hero-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 40px;
    flex-wrap: wrap;
}

.hero-text {
    flex: 1;
    min-width: 300px;
}

.badge {
    display: inline-block;
    padding: 4px 12px;
    background: var(--primary-light);
    color: var(--primary);
    font-size: 0.85rem;
    font-weight: 600;
    border-radius: 20px;
    margin-bottom: 15px;
}

.badge-success {
    background: #dcfce7;
    color: #166534;
}

[data-theme="dark"] .badge-success {
    background: #14532d;
    color: #86efac;
}

.hero-text h1 {
    font-size: 2.8rem;
    line-height: 1.2;
    margin-bottom: 15px;
}

.subtitle {
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 25px;
}

.contact-buttons {
    display: flex;
    gap: 15px;
    margin-bottom: 25px;
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--primary);
    color: #fff;
}

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

.btn-outline {
    border: 1px solid var(--border);
    color: var(--text-main);
    background: var(--bg-card);
}

.btn-outline:hover {
    border-color: var(--primary);
    color: var(--primary);
}

.social-links {
    display: flex;
    gap: 15px;
}

.social-links a {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: var(--bg-alt);
    color: var(--text-main);
    display: flex;
    align-items: center;
    justify-content: center;
    text-decoration: none;
    transition: var(--transition);
}

.social-links a:hover {
    background: var(--primary);
    color: #fff;
    transform: translateY(-3px);
}

.hero-card {
    flex: 1;
    min-width: 280px;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 30px;
    box-shadow: var(--shadow-lg);
    text-align: center;
}

.avatar-box {
  width: 150px;
  height: 150px;
  border-radius: 50%;
  overflow: hidden;
  margin: 2rem auto 1rem; /* Centers image and gives vertical spacing */
  border: 4px solid #fff;
  box-shadow: 0 4px 15px rgba(0, 0, 0, 0.15);
  display: flex;
  margin-top: -70px;
  justify-content: center;
  align-items: center;
}

/* Image scaling */
.profile-img {
  width: 100%;
  height: 100%;
  object-fit: cover; /* Prevents image distortion */
}

.quick-stats {
    display: flex;
    justify-content: space-around;
    border-top: 1px solid var(--border);
    padding-top: 20px;
    margin-top: 20px;
}

.stat-item {
    display: flex;
    flex-direction: column;
}

.stat-num {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
}

.stat-label {
    font-size: 0.75rem;
    color: var(--text-muted);
}

/* Sections General */
.section {
    padding: 70px 0;
}

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

.section-title {
    font-size: 2rem;
    margin-bottom: 40px;
    display: flex;
    align-items: center;
    gap: 12px;
}

.section-title i {
    color: var(--primary);
}

/* Timeline (Experience) */
.timeline {
    position: relative;
    border-left: 2px solid var(--border);
    margin-left: 20px;
    padding-left: 25px;
}

.timeline-item {
    position: relative;
    margin-bottom: 40px;
}

.timeline-dot {
    position: absolute;
    left: -32px;
    top: 5px;
    width: 12px;
    height: 12px;
    background: var(--primary);
    border-radius: 50%;
    border: 3px solid var(--bg-body);
}

.timeline-date {
    font-size: 0.85rem;
    font-weight: 600;
    color: var(--primary);
    margin-bottom: 5px;
}

.timeline-content {
    background: var(--bg-card);
    padding: 25px;
    border-radius: var(--radius);
    border: 1px solid var(--border);
    box-shadow: var(--shadow-sm);
}

.company {
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 15px;

}

.timeline-content ul {
    margin-left: 20px;
    margin-bottom: 15px;
}

.timeline-content li {
    margin-bottom: 8px;
    color: var(--text-main);
}

/* Cards Grid (Education) */
.cards-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
}

.card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 25px;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-md);
}

.card-icon {
    font-size: 2rem;
    color: var(--primary);
    margin-bottom: 10px;
}

.card-date {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.institution {
    font-weight: 600;
    color: var(--text-muted);
    margin-bottom: 10px;
}

.card-desc {
    margin-top: 10px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

/* Skills */
.filter-container {
    display: flex;
    gap: 10px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.filter-btn {
    padding: 8px 16px;
    border-radius: 20px;
    border: 1px solid var(--border);
    background: var(--bg-card);
    color: var(--text-muted);
    cursor: pointer;
    font-weight: 500;
    transition: var(--transition);
}

.filter-btn:hover, .filter-btn.active {
    background: var(--primary);
    color: #fff;
    border-color: var(--primary);
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.skill-category {
    background: var(--bg-card);
    border: 1px solid var(--border);
    padding: 20px;
    border-radius: var(--radius);
    transition: var(--transition);
}

.skill-category h3 {
    font-size: 1.1rem;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.skill-chip {
    background: var(--bg-alt);
    border: 1px solid var(--border);
    padding: 5px 12px;
    border-radius: 6px;
    font-size: 0.85rem;
    font-weight: 500;
    display: inline-flex;
    align-items: center;
    gap: 5px;
}

.language-list {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.lang-item {
    display: flex;
    justify-content: space-between;
    padding: 5px 0;
    border-bottom: 1px dashed var(--border);
    font-size: 0.9rem;
}

.lang-level {
    color: var(--primary);
    font-weight: 600;
}

.tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}

.tag {
    background: var(--primary-light);
    color: var(--primary);
    font-size: 0.75rem;
    padding: 3px 8px;
    border-radius: 4px;
    font-weight: 600;
}

/* Projects Page */
.projects-page {
    padding: 60px 0;
}

.page-header {
    text-align: center;
    margin-bottom: 40px;
}

.page-header h1 {
    font-size: 2.5rem;
    margin-bottom: 10px;
}

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

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr));
    gap: 30px;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    display: flex;
    flex-direction: column;
}

.project-card:hover {
    transform: translateY(-6px);
    box-shadow: var(--shadow-lg);
}

.project-banner {
    height: 120px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 0 25px;
    color: #fff;
    position: relative;
}

.bg-gradient-1 { background: linear-gradient(135deg, #3b82f6, #1d4ed8); }
.bg-gradient-2 { background: linear-gradient(135deg, #10b981, #047857); }
.bg-gradient-3 { background: linear-gradient(135deg, #8b5cf6, #6d28d9); }
.bg-gradient-4 { background: linear-gradient(135deg, #f59e0b, #d97706); }

.project-icon {
    font-size: 3rem;
    opacity: 0.8;
}

.project-type {
    background: rgba(255, 255, 255, 0.2);
    backdrop-filter: blur(5px);
    padding: 4px 10px;
    border-radius: 12px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.project-content {
    padding: 25px;
    display: flex;
    flex-direction: column;
    flex: 1;
}

.project-content h3 {
    font-size: 1.25rem;
    margin-bottom: 10px;
}

.project-desc {
    color: var(--text-muted);
    font-size: 0.9rem;
    margin-bottom: 15px;
}

.project-details {
    margin-bottom: 20px;
    flex: 1;
}

.project-details h4 {
    font-size: 0.85rem;
    text-transform: uppercase;
    color: var(--text-muted);
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.project-details ul {
    margin-left: 18px;
    font-size: 0.88rem;
    color: var(--text-main);
}

.project-details li {
    margin-bottom: 6px;
}

/* Footer */
footer {
    border-top: 1px solid var(--border);
    padding: 30px 0;
    margin-top: 60px;
    background: var(--bg-card);
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    flex-wrap: wrap;
    gap: 15px;
    font-size: 0.9rem;
    color: var(--text-muted);
}

.footer-links {
    display: flex;
    gap: 15px;
}

.footer-links a {
    color: var(--text-muted);
    text-decoration: none;
    transition: var(--transition);
}

.footer-links a:hover {
    color: var(--primary);
}

/* Mobile Responsive */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        position: absolute;
        top: 100%;
        left: 0;
        width: 100%;
        background: var(--bg-card);
        flex-direction: column;
        padding: 20px;
        border-bottom: 1px solid var(--border);
        box-shadow: var(--shadow-md);
    }

    .nav-links.active {
        display: flex;
    }

    .hamburger {
        display: flex;
    }

    .hero-text h1 {
        font-size: 2.2rem;
    }

    .timeline {
        margin-left: 10px;
        padding-left: 15px;
    }

    .timeline-dot {
        left: -22px;
    }
}