/* ==================== VARIABLES ==================== */
:root {
    --primary-gradient: linear-gradient(135deg, #60a5fa, #22d3ee, #14b8a6);
    --bg-dark: #0f172a;
    --bg-darker: #020617;
    --bg-card: rgba(15, 23, 42, 0.5);
    --border-color: #334155;
    --text-primary: #ffffff;
    --text-secondary: #cbd5e1;
    --text-muted: #94a3b8;
    --cyan: #22d3ee;
    --blue: #60a5fa;
    --slate-700: #334155;
    --slate-800: #1e293b;
    --slate-900: #0f172a;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #0f172a 0%, #1e293b 50%, #0f172a 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
}

/* ==================== UTILITIES ==================== */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.gradient-text {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-title {
    font-size: 2.5rem;
    font-weight: bold;
    text-align: center;
    margin-bottom: 3rem;
}

/* ==================== NAVIGATION ==================== */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
}

.nav-container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 64px;
}

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

.nav-menu {
    display: flex;
    gap: 2rem;
}

.nav-link {
    color: var(--text-secondary);
    text-decoration: none;
    text-transform: capitalize;
    transition: color 0.3s;
    padding: 0.5rem 0;
}

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

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

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: 0.3s;
}

/* ==================== HERO SECTION ==================== */
.hero {
    padding-top: 8rem;
    padding-bottom: 5rem;
    text-align: center;
}

.hero-title {
    font-size: 4rem;
    font-weight: bold;
    margin-bottom: 1.5rem;
}

.hero-subtitle {
    font-size: 1.875rem;
    color: var(--text-secondary);
    margin-bottom: 1rem;
}

.hero-location {
    font-size: 1.125rem;
    color: var(--text-muted);
    margin-bottom: 2rem;
}

.hero-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.hero-contact {
    display: flex;
    justify-content: center;
    gap: 2rem;
    flex-wrap: wrap;
    color: var(--text-muted);
}

.contact-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    text-decoration: none;
    color: var(--text-muted);
    transition: color 0.3s;
}

.contact-item:hover {
    color: var(--cyan);
}

/* ==================== BUTTONS ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.75rem 1.5rem;
    border-radius: 0.5rem;
    text-decoration: none;
    font-weight: 500;
    transition: all 0.3s;
    cursor: pointer;
    border: none;
}

.btn-primary {
    background: var(--cyan);
    color: var(--bg-dark);
}

.btn-primary:hover {
    background: #06b6d4;
    transform: translateY(-2px);
}

.btn-secondary {
    background: var(--slate-700);
    color: var(--text-primary);
}

.btn-secondary:hover {
    background: #475569;
    transform: translateY(-2px);
}

.btn-linkedin {
    background: #0077b5;
    color: var(--text-primary);
}

.btn-linkedin:hover {
    background: #006399;
    transform: translateY(-2px);
}

.btn-lg {
    padding: 1rem 2rem;
    font-size: 1.125rem;
}

/* ==================== ABOUT SECTION ==================== */
.about {
    padding: 5rem 0;
    background: rgba(30, 41, 59, 0.5);
}

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

.about-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
}

.card-header {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.card-header i {
    color: var(--cyan);
    font-size: 1.75rem;
}

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

.card-title {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

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

.card-year {
    color: var(--text-muted);
    margin-top: 0.5rem;
}

.about-summary {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
}

.about-summary h3 {
    display: flex;
    align-items: center;
    gap: 1rem;
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.about-summary i {
    color: var(--cyan);
    font-size: 1.75rem;
}

.about-summary p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ==================== SKILLS SECTION ==================== */
.skills {
    padding: 5rem 0;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 1.5rem;
}

.skill-card {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
    transition: all 0.3s;
}

.skill-card:hover {
    border-color: var(--cyan);
    transform: translateY(-5px);
}

.skill-card h3 {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.25rem;
    margin-bottom: 1rem;
}

.skill-card i {
    color: var(--cyan);
}

.skill-card ul {
    list-style: none;
}

.skill-card li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.skill-card li i {
    color: var(--cyan);
    font-size: 0.875rem;
}

/* ==================== PROJECTS SECTION ==================== */
.projects {
    padding: 5rem 0;
    background: rgba(30, 41, 59, 0.5);
}

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

.project-card {
    background: var(--bg-card);
    padding: 1.5rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
    transition: all 0.3s;
}

.project-card:hover {
    border-color: var(--cyan);
    transform: scale(1.05);
}

.project-category {
    display: inline-block;
    padding: 0.25rem 0.75rem;
    background: rgba(34, 211, 238, 0.2);
    color: var(--cyan);
    border-radius: 1rem;
    font-size: 0.875rem;
    margin-bottom: 1rem;
}

.project-card h3 {
    font-size: 1.5rem;
    margin-bottom: 0.75rem;
}

.project-card p {
    color: var(--text-muted);
    margin-bottom: 1rem;
}

.project-tech {
    display: flex;
    flex-wrap: wrap;
    gap: 0.5rem;
    margin-bottom: 1rem;
}

.tech-tag {
    padding: 0.25rem 0.5rem;
    background: var(--slate-800);
    color: var(--text-secondary);
    border-radius: 0.25rem;
    font-size: 0.875rem;
}

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

.project-link {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--cyan);
    text-decoration: none;
    transition: color 0.3s;
}

.project-link:hover {
    color: var(--blue);
}

.projects-footer {
    text-align: center;
    color: var(--text-muted);
    margin-top: 2rem;
}

.projects-footer a {
    color: var(--cyan);
    text-decoration: none;
}

.projects-footer a:hover {
    text-decoration: underline;
}

/* ==================== CONTACT SECTION ==================== */
.contact {
    padding: 5rem 0;
    text-align: center;
}

.contact-intro {
    font-size: 1.25rem;
    color: var(--text-secondary);
    margin-bottom: 2rem;
    max-width: 800px;
    margin-left: auto;
    margin-right: auto;
}

.availability-card {
    background: var(--bg-card);
    padding: 2rem;
    border-radius: 0.5rem;
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
    max-width: 600px;
    margin-left: auto;
    margin-right: auto;
}

.availability-card h3 {
    font-size: 1.5rem;
    margin-bottom: 1rem;
}

.availability-card ul {
    list-style: none;
    text-align: left;
}

.availability-card li {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.availability-card li i {
    color: var(--cyan);
}

.contact-buttons {
    display: flex;
    justify-content: center;
    gap: 1rem;
    flex-wrap: wrap;
}

/* ==================== FOOTER ==================== */
.footer {
    padding: 2rem 0;
    background: var(--bg-darker);
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer p {
    color: var(--text-muted);
    margin-bottom: 0.5rem;
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        left: -100%;
        top: 64px;
        flex-direction: column;
        background: var(--slate-900);
        width: 100%;
        text-align: center;
        transition: 0.3s;
        padding: 2rem 0;
        border-bottom: 1px solid var(--border-color);
    }

    .nav-menu.active {
        left: 0;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(-45deg) translate(-5px, 6px);
    }

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

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(45deg) translate(-5px, -6px);
    }

    .hero-title {
        font-size: 2.5rem;
    }

    .hero-subtitle {
        font-size: 1.5rem;
    }

    .section-title {
        font-size: 2rem;
    }

    .about-grid,
    .skills-grid,
    .projects-grid {
        grid-template-columns: 1fr;
    }

    .hero-buttons,
    .contact-buttons {
        flex-direction: column;
        align-items: center;
    }

    .btn {
        width: 100%;
        max-width: 300px;
        justify-content: center;
    }
}