:root{
    --bg-color: #f8fafc;
    --text-main: #0f172a;
    --text-muted: #64748b;
    --primary: #3b82f6;
    --primary-hover: #2563eb;
    --card-bg: #ffffff;
    --border-color: #e2e8f0;
    --nav-bg: rgba(255, 255, 255, 0.9);
}

[data-theme="dark"] {
    --bg-color: #0f172a;
    --text-main: #f8fafc;
    --primary: #60a5fa;
    --primary-hover: #3b82f6;
    --card-bg: #1e293b;
    --border-color: #334155;
    --nav-bg: rgba(15, 23, 42, 0.9);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    transition: background-color 0.3s ease, color 0.3s ease;
}

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

a{
    text-decoration: none;
    color: inherit;
}

nav{
    position: fixed;
    top: 0;
    width: 100%;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 5%;
    background: var(--nav-bg);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

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

.navlinks{
    display: flex;
    gap: 2rem;
    align-items: center;
}

.navlinks a{
    font-weight: 600;
    font-size: 0.95rem;
}

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

#theme-toggle{
    background: none;
    border: none;
    color: var(--text-main);
    font-size: 1.2rem;
    cursor: pointer;
}

section{
    padding: 6rem 5% 4rem;
    max-width: 1200px;
    margin: 0 auto;
}

#hero{
    height: 100vh;
    display: flex;
    flex-direction: column;
    justify-content: center;
    align-items: flex-start;
}

#hero h1{
    font-size: clamp(2.5rem, 5vw, 4.5rem);
    line-height: 1.1;
    font-weight: 700;
}

#hero h2{
    font-size: clamp(1.5rem, 3vw, 2.6rem);
    color: var(--text-muted);
    margin-bottom: 1.5rem;
    font-weight: 400;
}

#hero p {
    max-width: 600px;
    font-size: 1.1rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.btn {
    padding: 0.8rem 1.5rem;
    background-color: var(--primary);
    color: white;
    border-radius: 8px;
    font-weight: 600;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.btn:hover{
    background-color: var(--primary-hover);
    color: white;
}

.contact-links{
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
}

.section-title{
    font-size: 2.5rem;
    margin-bottom: 2rem;
    position: relative;
    display: inline-block;
}

.section-title::after{
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 50%;
    height: 4px;
    background-color: var(--primary);
    border-radius: 2px;
}

.skills-grid{
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.skill-tag{
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    padding: 0.5rem 1rem;
    border-radius: 20px;
    font-weight: 600;
    font-size: 0.9rem;
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
}

.skill-tag.center-row {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
    justify-content: center;
}

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

.project-card{
    background-color: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 1.5rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.project-card h3{
    font-size: 1.5rem;
}

.project-card p{
    color: var(--text-muted);
    flex-grow: 1;
}

.project-links{
    display: flex;
    gap: 1rem;
    margin-top: 1rem;
}

.contact-links{
    margin-bottom: 2rem;
}

footer{
    text-align: center;
    padding: 2rem;
    border-top: 1px solid var(--border-color);
    margin-top: 4rem;
    color: var(--text-muted);
}

@media (max-width: 768px){
    .navlinks{
        display: none;
    }

    #hero{
        align-items: center;
        text-align: center;
    }
}

html {
    scroll-behavior: smooth;
}

button.btn {
    border: none;
    outline: none;
    font-family: inherit;
    font-size: 1rem;
    cursor: pointer;
}

.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100vw;
    height: 100vh;
    background: rgba(0, 0, 0, 0.65);
    backdrop-filter: blur(6px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.25s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: auto;
}

.modal-card {
    background-color: var(--card-bg);
    border: none;
    border-radius: 24px;
    padding: 3.5rem 2.5rem 3rem;
    width: 90%;
    max-width: 420px;
    text-align: center;
    position: relative;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.4);
    transform: scale(0.92);
    transition: transform 0.25s ease;
}

.modal-overlay.active .modal-card {
    transform: scale(1);
}

.modal-title {
    font-size: 1.8rem;
    font-weight: 700;
    margin-bottom: 1.2rem;
    color: var(--text-main);
}

.modal-username-box {
    background-color: var(--bg-color);
    border: none;
    border-radius: 14px;
    padding: 0.9rem 1.6rem;
    font-size: 1.15rem;
    font-weight: 600;
    color: var(--primary);
    display: inline-block;
    word-break: break-all;
    user-select: all;
}

.modal-close {
    position: absolute;
    top: 16px;
    right: 20px;
    background: none;
    border: none;
    font-size: 1.6rem;
    color: var(--text-muted);
    cursor: pointer;
    line-height: 1;
}

.modal-close:hover {
    color: var(--primary);
}