/* =================================
   1. GLOBAL SETTINGS
================================= */

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

:root {
    --background: #0b0f19;
    --surface: #111827;
    --card: #151e2e;
    --accent: #3b82f6;
    --text: #f1f5f9;
    --muted: #94a3b8;
    --border: #263449;
}

body {
    font-family: Arial, Helvetica, sans-serif;
    background: var(--background);
    color: var(--text);
    line-height: 1.7;
}


/* =================================
   2. NAVIGATION BAR
================================= */

.header {
    width: 100%;
    position: sticky;
    top: 0;
    z-index: 1000;
    background: rgba(11, 15, 25, 0.95);
    border-bottom: 1px solid var(--border);
}

.navbar {
    max-width: 1200px;
    margin: auto;
    padding: 18px 30px;

    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo {
    font-size: 27px;
    font-weight: bold;
    color: var(--text);
    text-decoration: none;
}

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

.nav-links {
    display: flex;
    list-style: none;
    gap: 28px;
}

.nav-links a {
    text-decoration: none;
    color: var(--muted);
    font-size: 14px;
    transition: 0.3s;
}

.nav-links a:hover {
    color: var(--accent);
}

#theme-toggle {
    background: transparent;
    color: var(--text);
    border: 1px solid var(--border);
    padding: 8px 15px;
    border-radius: 6px;
    cursor: pointer;
}


/* =================================
   3. HERO SECTION
================================= */

.hero {
    min-height: 85vh;
    max-width: 1200px;
    margin: auto;
    padding: 80px 30px;

    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 50px;
}

.hero-content {
    max-width: 650px;
}

.hero-greeting {
    color: var(--accent);
    font-size: 18px;
    margin-bottom: 12px;
}

.hero-content h1 {
    font-size: clamp(42px, 6vw, 68px);
    line-height: 1.2;
    margin-bottom: 12px;
}

.hero-content h2 {
    font-size: 25px;
    color: var(--muted);
    font-weight: 500;
}

.hero-description {
    margin: 25px 0;
    color: var(--muted);
    max-width: 550px;
}

.hero-buttons {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
}

.btn {
    display: inline-block;
    padding: 12px 24px;
    border-radius: 6px;
    text-decoration: none;
    font-weight: bold;
    transition: 0.3s;
}

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

.primary-btn:hover {
    background: #2563eb;
    transform: translateY(-3px);
}

.secondary-btn {
    border: 1px solid var(--border);
    color: var(--text);
}

.secondary-btn:hover {
    border-color: var(--accent);
    color: var(--accent);
}

.profile-placeholder {
    width: 260px;
    height: 260px;
    border-radius: 50%;

    display: flex;
    align-items: center;
    justify-content: center;

    font-size: 70px;
    font-weight: bold;

    background: var(--card);
    border: 3px solid var(--accent);
    box-shadow: 0 0 40px rgba(59, 130, 246, 0.15);
}


/* =================================
   4. GENERAL SECTIONS
================================= */

.section {
    padding: 90px 30px;
    max-width: 1200px;
    margin: auto;
}

.section-heading {
    text-align: center;
    margin-bottom: 50px;
}

.section-heading p {
    color: var(--accent);
    font-size: 14px;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.section-heading h2 {
    font-size: 36px;
    margin-top: 8px;
}


/* =================================
   5. ABOUT SECTION
================================= */

.about-content {
    max-width: 800px;
    margin: auto;
    text-align: center;
    color: var(--muted);
}

.about-content p {
    margin-bottom: 18px;
}


/* =================================
   6. SKILLS SECTION
================================= */

.skills-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 20px;
}

.skill-card {
    background: var(--card);
    padding: 28px;
    border: 1px solid var(--border);
    border-radius: 10px;
    transition: 0.3s;
}

.skill-card:hover {
    transform: translateY(-6px);
    border-color: var(--accent);
}

.skill-card h3 {
    margin-bottom: 10px;
}

.skill-card p {
    color: var(--muted);
    font-size: 14px;
}


/* =================================
   7. PROJECTS SECTION
================================= */

.projects-container {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 22px;
}

.project-card {
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
    padding: 28px;
    transition: 0.3s;
}

.project-card:hover {
    transform: translateY(-7px);
    border-color: var(--accent);
}

.project-info h3 {
    margin-bottom: 15px;
}

.project-info p {
    color: var(--muted);
    margin-bottom: 20px;
}

.project-info span {
    color: var(--accent);
    font-size: 13px;
}


/* =================================
   8. EXPERIENCE SECTION
================================= */

.experience-content {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 25px;
}

.experience-card {
    padding: 30px;
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 10px;
}

.experience-card h3 {
    color: var(--accent);
    margin-bottom: 15px;
}

.experience-card h4 {
    margin-bottom: 8px;
}

.experience-card p {
    color: var(--muted);
}


/* =================================
   9. CONTACT SECTION
================================= */

.contact {
    text-align: center;
}

.contact > p {
    color: var(--muted);
}

.contact-links {
    margin-top: 25px;
    display: flex;
    justify-content: center;
    gap: 20px;
}

.contact-links a {
    color: var(--accent);
    text-decoration: none;
    border: 1px solid var(--border);
    padding: 10px 25px;
    border-radius: 6px;
    transition: 0.3s;
}

.contact-links a:hover {
    background: var(--accent);
    color: white;
}


/* =================================
   10. FOOTER
================================= */

.footer {
    padding: 25px 30px;
    text-align: center;
    border-top: 1px solid var(--border);
    color: var(--muted);
}

.footer a {
    display: inline-block;
    margin-top: 10px;
    color: var(--accent);
    text-decoration: none;
}


/* =================================
   11. RESPONSIVE DESIGN
================================= */

/* Tablets and smaller laptops */
@media (max-width: 992px) {

    .navbar {
        padding: 18px 22px;
    }

    .nav-links {
        gap: 15px;
    }

    .hero {
        padding: 70px 25px;
    }

    .skills-container,
    .projects-container {
        grid-template-columns: repeat(2, 1fr);
    }

}


/* Mobile devices */
@media (max-width: 768px) {

    .navbar {
        flex-wrap: wrap;
        gap: 15px;
    }

    .nav-links {
        width: 100%;
        flex-wrap: wrap;
        justify-content: center;
        gap: 12px 20px;
    }

    .hero {
        flex-direction: column-reverse;
        text-align: center;
        padding: 60px 22px;
        gap: 35px;
    }

    .hero-content {
        max-width: 100%;
    }

    .hero-buttons {
        justify-content: center;
    }

    .profile-placeholder {
        width: 190px;
        height: 190px;
        font-size: 55px;
    }

    .section {
        padding: 65px 22px;
    }

    .skills-container,
    .projects-container,
    .experience-content {
        grid-template-columns: 1fr;
    }

    .section-heading h2 {
        font-size: 29px;
    }

}


/* Small mobile devices */
@media (max-width: 480px) {

    .navbar {
        padding: 15px;
    }

    .logo {
        font-size: 23px;
    }

    .nav-links {
        gap: 10px 15px;
    }

    .nav-links a {
        font-size: 13px;
    }

    .hero-content h1 {
        font-size: 40px;
    }

    .hero-content h2 {
        font-size: 20px;
    }

    .hero-description {
        font-size: 14px;
    }

    .btn {
        padding: 10px 17px;
        font-size: 14px;
    }

    .contact-links {
        flex-wrap: wrap;
    }

}



/* =================================
   12. MOBILE NAVIGATION
================================= */

.menu-toggle {
    display: none;
    background: transparent;
    border: 1px solid var(--border);
    color: var(--text);
    font-size: 23px;
    padding: 4px 12px;
    border-radius: 5px;
    cursor: pointer;
}

@media (max-width: 768px) {

    .navbar {
        position: relative;
    }

    .menu-toggle {
        display: block;
    }

    .nav-links {
        display: none;
        flex-direction: column;
        align-items: center;
        width: 100%;
        padding: 15px 0;
    }

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

}


/* =================================
   13. LIGHT THEME
================================= */

body.light-theme {

    --background: #f8fafc;
    --surface: #ffffff;
    --card: #ffffff;
    --accent: #2563eb;
    --text: #172033;
    --muted: #64748b;
    --border: #dbe3ee;

}

body.light-theme .header {
    background: rgba(248, 250, 252, 0.95);
}

body.light-theme .profile-placeholder {
    box-shadow: 0 0 35px rgba(37, 99, 235, 0.12);
}