/* ===== VARIABLES ===== */
:root {
    --primary-color: #6366f1;
    --primary-dark: #4f46e5;
    --secondary-color: #10b981;
    --dark-bg: #0f172a;
    --dark-bg-secondary: #1e293b;
    --light-text: #f1f5f9;
    --gray-text: #94a3b8;
    --white: #ffffff;
    --gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 20px 60px rgba(0, 0, 0, 0.3);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    line-height: 1.6;
    color: var(--light-text);
    background-color: var(--dark-bg);
    overflow-x: hidden;
}

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

/* ===== NAVIGATION ===== */
.navbar {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(15, 23, 42, 0.95);
    backdrop-filter: blur(10px);
    z-index: 1000;
    padding: 1rem 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

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

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

.nav-menu {
    display: flex;
    list-style: none;
    gap: 2rem;
}

.nav-link {
    color: var(--light-text);
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient);
    transition: width 0.3s ease;
}

.nav-link:hover::after {
    width: 100%;
}

.nav-link:hover {
    color: var(--primary-color);
}

/* ===== HERO SECTION ===== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
    padding-top: 80px;
    overflow: hidden;
    background-image: url('https://images.unsplash.com/photo-1501504905252-473c47e087f8?ixlib=rb-4.1.0&ixid=M3wxMjA3fDB8MHxwaG90by1wYWdlfHx8fGVufDB8fHx8fA%3D%3D&auto=format&fit=crop&q=80&w=3174');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(15, 23, 42, 0.85) 0%, rgba(15, 23, 42, 0.75) 100%);
    z-index: 0;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: radial-gradient(circle at 20% 50%, rgba(99, 102, 241, 0.15) 0%, transparent 50%),
                radial-gradient(circle at 80% 80%, rgba(147, 51, 234, 0.15) 0%, transparent 50%);
    z-index: 1;
}

.hero-content {
    text-align: center;
    animation: fadeInUp 1s ease;
    position: relative;
    z-index: 2;
}

.hero-title {
    font-size: 4rem;
    font-weight: 700;
    margin-bottom: 1rem;
    line-height: 1.2;
}

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

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--gray-text);
    margin-bottom: 1rem;
}

.hero-description {
    font-size: 1.2rem;
    color: var(--gray-text);
    margin-bottom: 2rem;
}

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

/* ===== BUTTONS ===== */
.btn {
    display: inline-block;
    padding: 0.875rem 2rem;
    border-radius: 50px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: 2px solid transparent;
}

.btn-primary {
    background: var(--gradient);
    color: var(--white);
    box-shadow: 0 4px 15px rgba(99, 102, 241, 0.4);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(99, 102, 241, 0.6);
}

.btn-secondary {
    background: transparent;
    color: var(--light-text);
    border: 2px solid var(--primary-color);
}

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

/* ===== SECTIONS ===== */
.section {
    padding: 6rem 0;
}

.section-dark {
    background: var(--dark-bg-secondary);
}

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

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--gradient);
    margin: 1rem auto 0;
    border-radius: 2px;
}

/* ===== ABOUT SECTION ===== */
.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.about-text p {
    margin-bottom: 1rem;
    color: var(--gray-text);
    line-height: 1.8;
    font-size: 1.1rem;
}

.about-stats {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.stat-card {
    background: var(--dark-bg-secondary);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    transition: transform 0.3s ease;
}

.stat-card:hover {
    transform: translateY(-5px);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--gray-text);
    font-size: 1rem;
    margin-top: 0.5rem;
}

/* ===== SKILLS SECTION ===== */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.skill-card {
    background: var(--dark-bg);
    padding: 2rem;
    border-radius: 15px;
    text-align: center;
    transition: all 0.3s ease;
    border: 1px solid rgba(99, 102, 241, 0.1);
}

.skill-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.2);
}

.skill-icon {
    font-size: 3rem;
    margin-bottom: 1rem;
}

.skill-card h3 {
    margin-bottom: 1rem;
    color: var(--light-text);
}

.skill-card p {
    color: var(--gray-text);
    line-height: 1.6;
}

/* ===== SERVICES SECTION ===== */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 2rem;
}

.service-card {
    background: var(--dark-bg-secondary);
    padding: 2.5rem;
    border-radius: 20px;
    border: 1px solid rgba(99, 102, 241, 0.1);
    transition: all 0.4s ease;
    text-align: center;
}

.service-card:hover {
    transform: translateY(-10px);
    border-color: var(--primary-color);
    box-shadow: 0 15px 40px rgba(99, 102, 241, 0.3);
}

.service-icon {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    display: block;
}

.service-card h3 {
    color: var(--light-text);
    font-size: 1.4rem;
    margin-bottom: 1rem;
}

.service-card p {
    color: var(--gray-text);
    line-height: 1.8;
}

/* ===== PHILOSOPHY SECTION ===== */
.philosophy-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 2rem;
}

.philosophy-card {
    position: relative;
    padding: 2rem;
    background: var(--dark-bg);
    border-radius: 15px;
    border: 1px solid rgba(99, 102, 241, 0.1);
    transition: all 0.3s ease;
}

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

.philosophy-number {
    font-size: 3rem;
    font-weight: 700;
    background: var(--gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 1rem;
}

.philosophy-card h3 {
    color: var(--light-text);
    font-size: 1.2rem;
    margin-bottom: 1rem;
}

.philosophy-card p {
    color: var(--gray-text);
    line-height: 1.7;
}

/* ===== EXPERIENCE SECTION ===== */
.experience-timeline {
    max-width: 800px;
    margin: 0 auto;
    position: relative;
}

.experience-timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--primary-color) 0%, rgba(99, 102, 241, 0.1) 100%);
    transform: translateX(-50%);
}

.experience-item {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    margin-bottom: 3rem;
    position: relative;
}

.experience-item:nth-child(even) {
    direction: rtl;
}

.experience-item:nth-child(even) .experience-content {
    direction: ltr;
    text-align: left;
}

.experience-date {
    text-align: right;
    padding-right: 3rem;
    font-weight: 700;
    font-size: 1.2rem;
    color: var(--primary-color);
    display: flex;
    align-items: center;
    justify-content: flex-end;
    position: relative;
}

.experience-item:nth-child(even) .experience-date {
    text-align: left;
    padding-left: 3rem;
    padding-right: 0;
    justify-content: flex-start;
}

.experience-date::after {
    content: '';
    position: absolute;
    right: -1.5rem;
    width: 20px;
    height: 20px;
    background: var(--gradient);
    border-radius: 50%;
    border: 4px solid var(--dark-bg);
    box-shadow: 0 0 0 4px rgba(99, 102, 241, 0.2);
}

.experience-item:nth-child(even) .experience-date::after {
    right: auto;
    left: -1.5rem;
}

.experience-content {
    background: var(--dark-bg-secondary);
    padding: 2rem;
    border-radius: 15px;
    border: 1px solid rgba(99, 102, 241, 0.1);
    transition: all 0.3s ease;
}

.experience-content:hover {
    transform: translateY(-5px);
    border-color: var(--primary-color);
    box-shadow: 0 10px 30px rgba(99, 102, 241, 0.2);
}

.experience-content h3 {
    color: var(--light-text);
    font-size: 1.3rem;
    margin-bottom: 0.5rem;
}

.experience-content h4 {
    color: var(--primary-color);
    font-size: 1rem;
    font-weight: 600;
    margin-bottom: 0.75rem;
}

.experience-content p {
    color: var(--gray-text);
    line-height: 1.6;
}

/* ===== PROJECTS SECTION ===== */
.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 2rem;
}

.project-card {
    background: var(--dark-bg-secondary);
    border-radius: 15px;
    overflow: hidden;
    transition: transform 0.3s ease;
    border: 1px solid rgba(99, 102, 241, 0.1);
}

.project-card:hover {
    transform: translateY(-10px);
    box-shadow: var(--shadow-lg);
}

.project-image {
    height: 200px;
    background: linear-gradient(135deg, rgba(99, 102, 241, 0.2) 0%, rgba(147, 51, 234, 0.2) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    position: relative;
}

.project-overlay {
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.project-tag {
    background: var(--gradient);
    color: var(--white);
    padding: 0.5rem 1rem;
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
}

.project-content {
    padding: 1.5rem;
}

.project-content h3 {
    margin-bottom: 0.75rem;
    color: var(--light-text);
}

.project-content p {
    color: var(--gray-text);
    margin-bottom: 1rem;
    line-height: 1.6;
}

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

.tech-tag {
    background: rgba(99, 102, 241, 0.1);
    color: var(--primary-color);
    padding: 0.25rem 0.75rem;
    border-radius: 50px;
    font-size: 0.875rem;
}

/* ===== CONTACT SECTION ===== */
.contact-cta {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
    padding: 3rem 0;
}

.contact-subtitle {
    font-size: 1.3rem;
    color: var(--gray-text);
    margin-bottom: 2.5rem;
    line-height: 1.6;
}

.btn-large {
    font-size: 1.2rem;
    padding: 1.2rem 3rem;
    display: inline-flex;
    align-items: center;
    gap: 0.75rem;
}

.btn-icon {
    font-size: 1.4rem;
}

.contact-note {
    margin-top: 1.5rem;
    color: var(--gray-text);
    font-size: 0.95rem;
}

/* ===== FOOTER ===== */
.footer {
    background: var(--dark-bg-secondary);
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid rgba(99, 102, 241, 0.1);
}

.footer p {
    color: var(--gray-text);
}

/* ===== ANIMATIONS ===== */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
    .nav-menu {
        gap: 1rem;
        font-size: 0.9rem;
    }

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

    .hero-subtitle {
        font-size: 1.2rem;
    }

    .hero-description {
        font-size: 1rem;
    }

    .section {
        padding: 4rem 0;
    }

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

    .about-content,
    .contact-content {
        grid-template-columns: 1fr;
    }

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

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

    .services-grid {
        grid-template-columns: 1fr;
    }

    .philosophy-content {
        grid-template-columns: 1fr;
    }

    .experience-timeline::before {
        left: 20px;
    }

    .experience-item {
        grid-template-columns: 1fr;
        padding-left: 60px;
    }

    .experience-item:nth-child(even) {
        direction: ltr;
    }

    .experience-date {
        position: absolute;
        left: 0;
        padding-right: 0;
        padding-left: 0;
        text-align: left;
        font-size: 1rem;
    }

    .experience-date::after {
        left: 10px;
        right: auto;
    }

    .experience-item:nth-child(even) .experience-date {
        padding-left: 0;
        text-align: left;
    }

    .experience-item:nth-child(even) .experience-date::after {
        left: 10px;
    }
}

@media (max-width: 480px) {
    .nav-menu {
        display: none;
    }

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

    .btn {
        padding: 0.75rem 1.5rem;
        font-size: 0.9rem;
    }
}