/* =============================
   CSS Variables & Theme
   ============================= */
:root {
    --primary-color: #0ea5e9;
    --secondary-color: #06b6d4;
    --accent-color: #f43f5e;
    --dark-bg: #0f172a;
    --darker-bg: #0a0f1f;
    --light-text: #e2e8f0;
    --muted-text: #94a3b8;
    --border-color: rgba(15, 23, 42, 0.5);
    --card-bg: rgba(30, 41, 59, 0.8);
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Inter', sans-serif;
    background: linear-gradient(135deg, var(--dark-bg) 0%, var(--darker-bg) 100%);
    color: var(--light-text);
    line-height: 1.6;
    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);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
}

.nav-wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1rem 0;
}

.nav-brand {
    font-size: 1.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -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;
    position: relative;
    transition: var(--transition);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    transition: width 0.3s ease;
}

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

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

.nav-toggle span {
    width: 25px;
    height: 3px;
    background: var(--light-text);
    margin: 5px 0;
    transition: var(--transition);
}

/* =============================
   Hero Section
   ============================= */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 80px;
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.1) 0%, rgba(6, 182, 212, 0.1) 100%),
                linear-gradient(to bottom, var(--dark-bg), var(--darker-bg));
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.hero-text {
    animation: slideInLeft 0.8s ease;
}

.hero-title {
    font-size: clamp(2.5rem, 8vw, 4rem);
    font-weight: 700;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-subtitle {
    font-size: 1.5rem;
    color: var(--secondary-color);
    margin-bottom: 1rem;
    font-weight: 600;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--muted-text);
    margin-bottom: 2rem;
    max-width: 500px;
}

.hero-actions {
    display: flex;
    gap: 1rem;
    margin-bottom: 2rem;
    flex-wrap: wrap;
}

.btn {
    padding: 12px 28px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    border: none;
    cursor: pointer;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    font-size: 1rem;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    box-shadow: 0 10px 20px rgba(14, 165, 233, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 15px 30px rgba(14, 165, 233, 0.4);
}

.btn-secondary {
    background: rgba(30, 41, 59, 0.8);
    color: var(--light-text);
    border: 1px solid var(--primary-color);
}

.btn-secondary:hover {
    background: rgba(30, 41, 59, 0.95);
    border-color: var(--secondary-color);
}

.hero-social {
    display: flex;
    gap: 1.5rem;
}

.social-link {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    background: rgba(30, 41, 59, 0.8);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary-color);
    transition: var(--transition);
    border: 1px solid var(--border-color);
}

.social-link:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-color: var(--primary-color);
    transform: translateY(-3px);
}

/* Floating Cards Animation */
.hero-visual {
    position: relative;
    height: 400px;
    animation: slideInRight 0.8s ease;
}

.floating-card {
    position: absolute;
    padding: 24px 20px;
    border-radius: 16px;
    background: linear-gradient(135deg, rgba(30, 41, 59, 0.9), rgba(30, 41, 59, 0.6));
    border: 1px solid var(--border-color);
    backdrop-filter: blur(10px);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    color: var(--light-text);
    font-weight: 600;
    animation: float 3s ease-in-out infinite;
    min-width: 140px;
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
    transition: var(--transition);
}

.floating-card:hover {
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.2), rgba(6, 182, 212, 0.2));
    border-color: var(--primary-color);
    transform: translateY(-5px);
}

.card-icon-wrapper {
    width: 50px;
    height: 50px;
    border-radius: 12px;
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.2), rgba(6, 182, 212, 0.2));
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.8rem;
    color: var(--primary-color);
}

.card-text {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 4px;
    text-align: center;
}

.card-title {
    font-size: 0.95rem;
    color: var(--light-text);
    font-weight: 600;
    letter-spacing: 0.3px;
}

.card-subtitle {
    font-size: 0.75rem;
    color: var(--secondary-color);
    font-weight: 500;
    opacity: 0.8;
}

.card-1 {
    top: 20px;
    right: 20px;
    animation-delay: 0s;
}

.card-2 {
    top: 50%;
    right: 0;
    animation-delay: 0.5s;
}

.card-3 {
    bottom: 20px;
    right: 50px;
    animation-delay: 1s;
}

@keyframes float {
    0%, 100% { transform: translateY(0px); }
    50% { transform: translateY(-20px); }
}

@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(50px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

/* =============================
   Section Header
   ============================= */
.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-header h2 {
    font-size: 2.5rem;
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--light-text);
}

.header-line {
    width: 60px;
    height: 4px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    margin: 0 auto;
    border-radius: 2px;
}

/* =============================
   About Section
   ============================= */
.about {
    padding: 80px 0;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: start;
}

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

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

.about-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.stat {
    background: rgba(30, 41, 59, 0.6);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: var(--transition);
}

.stat:hover {
    background: rgba(30, 41, 59, 0.9);
    border-color: var(--primary-color);
    transform: translateY(-5px);
}

.stat-number {
    font-size: 2.5rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.stat-label {
    color: var(--muted-text);
    margin-top: 0.5rem;
    font-weight: 500;
}

/* =============================
   Experience Section
   ============================= */
.experience {
    padding: 80px 0;
    background: rgba(10, 15, 31, 0.5);
}

.timeline {
    position: relative;
    padding: 20px 0;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 2px;
    height: 100%;
    background: linear-gradient(180deg,
                    var(--primary-color) 0%,
                    var(--secondary-color) 50%,
                    transparent 100%);
}

.timeline-item {
    margin-bottom: 3rem;
    position: relative;
}

.timeline-item:nth-child(even) .timeline-content {
    margin-left: 52%;
}

.timeline-item:nth-child(odd) .timeline-content {
    margin-right: 52%;
    text-align: right;
}

.timeline-marker {
    position: absolute;
    left: 50%;
    transform: translateX(-50%);
    width: 16px;
    height: 16px;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border: 3px solid var(--dark-bg);
    border-radius: 50%;
    top: 10px;
    z-index: 1;
}

.timeline-content {
    background: rgba(30, 41, 59, 0.6);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.timeline-content:hover {
    background: rgba(30, 41, 59, 0.9);
    border-color: var(--primary-color);
    transform: translateY(-5px);
}

.timeline-header {
    display: flex;
    justify-content: space-between;
    align-items: start;
    margin-bottom: 0.5rem;
    gap: 1rem;
}

.timeline-header h3 {
    font-size: 1.3rem;
    color: var(--primary-color);
}

.timeline-date {
    color: var(--secondary-color);
    font-size: 0.9rem;
    font-weight: 600;
    white-space: nowrap;
}

.timeline-company {
    color: var(--muted-text);
    margin-bottom: 1rem;
    font-size: 0.95rem;
}

.timeline-highlights {
    list-style: none;
}

.timeline-highlights li {
    color: var(--muted-text);
    margin-bottom: 0.8rem;
    padding-left: 20px;
    position: relative;
}

.timeline-highlights li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--secondary-color);
    font-weight: bold;
}

/* =============================
   Skills Section
   ============================= */
.skills {
    padding: 80px 0;
}

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

.skill-category {
    background: rgba(30, 41, 59, 0.6);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    transition: var(--transition);
}

.skill-category:hover {
    background: rgba(30, 41, 59, 0.9);
    border-color: var(--primary-color);
    transform: translateY(-5px);
}

.skill-category h4 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 1.1rem;
}

.skill-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.8rem;
}

.skill-tag {
    background: linear-gradient(135deg, rgba(14, 165, 233, 0.1), rgba(6, 182, 212, 0.1));
    color: var(--light-text);
    padding: 6px 14px;
    border-radius: 20px;
    border: 1px solid rgba(14, 165, 233, 0.3);
    font-size: 0.9rem;
    transition: var(--transition);
}

.skill-tag:hover {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    border-color: var(--primary-color);
    color: white;
}

/* =============================
   Certifications Section
   ============================= */
.certifications {
    padding: 80px 0;
    background: rgba(10, 15, 31, 0.5);
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 2rem;
}

.cert-card {
    background: rgba(30, 41, 59, 0.6);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
    text-align: center;
    transition: var(--transition);
}

.cert-card:hover {
    background: rgba(30, 41, 59, 0.9);
    border-color: var(--primary-color);
    transform: translateY(-5px);
}

.cert-icon {
    font-size: 3rem;
    color: var(--primary-color);
    margin-bottom: 1rem;
}

.cert-card h4 {
    color: var(--light-text);
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

.cert-card p {
    color: var(--muted-text);
    font-size: 0.9rem;
}

/* =============================
   Contact Section
   ============================= */
.contact {
    padding: 80px 0;
}

.contact-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
}

.contact-info {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

.contact-item {
    display: flex;
    gap: 1.5rem;
    align-items: start;
}

.contact-icon {
    font-size: 1.5rem;
    color: var(--primary-color);
    width: 50px;
    height: 50px;
    background: rgba(30, 41, 59, 0.8);
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    flex-shrink: 0;
}

.contact-details h4 {
    color: var(--light-text);
    margin-bottom: 0.5rem;
}

.contact-details a {
    color: var(--secondary-color);
    text-decoration: none;
    transition: var(--transition);
}

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

.contact-form {
    background: rgba(30, 41, 59, 0.6);
    padding: 2rem;
    border-radius: 12px;
    border: 1px solid var(--border-color);
}

.contact-form h3 {
    color: var(--light-text);
    margin-bottom: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    background: rgba(15, 23, 42, 0.8);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--light-text);
    font-family: inherit;
    transition: var(--transition);
}

.form-group input::placeholder,
.form-group textarea::placeholder {
    color: var(--muted-text);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    background: rgba(15, 23, 42, 0.95);
}

/* =============================
   Footer
   ============================= */
.footer {
    padding: 2rem 0;
    text-align: center;
    border-top: 1px solid var(--border-color);
    color: var(--muted-text);
    font-size: 0.9rem;
}

/* =============================
   Responsive Design
   ============================= */
@media (max-width: 768px) {
    .nav-menu {
        display: none;
    }

    .nav-toggle {
        display: flex;
    }

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

    .hero-visual {
        position: static;
        height: auto;
        margin-top: 2rem;
        display: flex;
        flex-wrap: wrap;
        gap: 1rem;
        justify-content: center;
    }

    .floating-card {
        position: static;
        animation: none;
        padding: 20px;
        max-width: 150px;
    }

    .card-1, .card-2, .card-3 {
        animation: none;
    }

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

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

    .about-stats {
        grid-template-columns: 1fr 1fr;
    }

    .timeline::before {
        left: 15px;
    }

    .timeline-item:nth-child(even) .timeline-content,
    .timeline-item:nth-child(odd) .timeline-content {
        margin-left: 50px;
        margin-right: 0;
        text-align: left;
    }

    .timeline-marker {
        left: 15px;
    }

    .timeline-header {
        flex-direction: column;
    }

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

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

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

    .hero-actions {
        flex-direction: column;
    }

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

@media (max-width: 480px) {
    .hero-title {
        font-size: 1.5rem;
    }

    .hero-subtitle {
        font-size: 1.1rem;
    }

    .section-header h2 {
        font-size: 1.8rem;
    }

    .container {
        padding: 0 15px;
    }

    .nav-menu li {
        display: none;
    }
}

/* =============================
   Print Styles
   ============================= */
@media print {
    .navbar,
    .footer,
    .contact-form,
    .btn-secondary {
        display: none;
    }
}