/* =========================================
   CSS Variables & Resets
   ========================================= */
:root {
    --bg-color: #0B1120;
    --card-bg: rgba(30, 41, 59, 0.7);
    --card-border: rgba(255, 255, 255, 0.1);
    --text-primary: #F8FAFC;
    --text-secondary: #94A3B8;
    --accent-primary: #14B8A6; /* Teal */
    --accent-secondary: #0EA5E9; /* Blue */
    --font-main: 'Inter', sans-serif;
    --transition-speed: 0.3s;
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-main);
    background-color: var(--bg-color);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
}

/* =========================================
   Typography & Utilities
   ========================================= */
h1, h2, h3, h4 {
    font-weight: 600;
    line-height: 1.2;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color var(--transition-speed);
}

ul {
    list-style: none;
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 2rem;
}

.section {
    padding: 100px 0;
}

.section-title {
    font-size: 2.5rem;
    margin-bottom: 3rem;
    text-align: center;
    position: relative;
    display: block;
    width: 100%;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-secondary), var(--accent-primary));
    border-radius: 2px;
}

/* Buttons */
.btn {
    display: inline-block;
    padding: 0.8rem 1.5rem;
    border-radius: 6px;
    font-weight: 500;
    cursor: pointer;
    transition: all var(--transition-speed);
    text-align: center;
}

.btn-primary {
    background: linear-gradient(90deg, var(--accent-secondary), var(--accent-primary));
    color: #fff;
    border: none;
}

.btn-primary:hover {
    box-shadow: 0 4px 15px rgba(20, 184, 166, 0.4);
    transform: translateY(-2px);
}

.btn-outline {
    background: transparent;
    color: var(--accent-primary);
    border: 1px solid var(--accent-primary);
}

.btn-outline:hover {
    background: rgba(20, 184, 166, 0.1);
    transform: translateY(-2px);
}

.btn-block {
    width: 100%;
}

/* =========================================
   Navigation
   ========================================= */
.header {
    position: fixed;
    top: 0;
    width: 100%;
    background: rgba(11, 17, 32, 0.85);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--card-border);
    z-index: 1000;
    transition: all var(--transition-speed);
}

.navbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 70px;
}

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

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

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

.nav-link {
    font-size: 0.95rem;
    color: var(--text-secondary);
    font-weight: 500;
}

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

.mobile-menu-toggle {
    display: none;
    font-size: 1.8rem;
    color: var(--text-primary);
    background: none;
    border: none;
    cursor: pointer;
}

/* =========================================
   Hero Section
   ========================================= */
.hero {
    position: relative;
    height: 100vh;
    min-height: 600px;
    display: flex;
    align-items: center;
    overflow: hidden;
}

.hero-bg {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

.bg-image {
    width: 100%;
    height: 100%;
    object-fit: cover;
    opacity: 0.4;
}

.bg-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(to bottom, rgba(11, 17, 32, 0.3) 0%, var(--bg-color) 100%);
}

.hero-content {
    max-width: 800px;
}

.hero-greeting {
    color: var(--accent-primary);
    font-size: 1.2rem;
    margin-bottom: 1rem;
    font-weight: 500;
}

.hero-title {
    font-size: 5rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.hero-subtitle {
    font-size: 2.5rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.hero-description {
    font-size: 1.1rem;
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    max-width: 600px;
}

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

/* =========================================
   About Section
   ========================================= */
.about-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 4rem;
    align-items: center;
}

.about-image {
    position: relative;
}

.image-wrapper {
    position: relative;
    border-radius: 10px;
    overflow: hidden;
}

.image-wrapper::before {
    content: '';
    position: absolute;
    inset: 0;
    background: var(--accent-primary);
    opacity: 0.15;
    mix-blend-mode: multiply;
    border-radius: 10px;
    z-index: 1;
    transition: opacity var(--transition-speed);
}

.image-wrapper:hover::before {
    opacity: 0;
}

.image-wrapper::after {
    content: '';
    position: absolute;
    inset: 0;
    border: 2px solid var(--accent-primary);
    border-radius: 10px;
    transform: translate(15px, 15px);
    z-index: -1;
    transition: transform var(--transition-speed);
}

.image-wrapper:hover::after {
    transform: translate(10px, 10px);
}

.image-wrapper img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 10px;
    filter: grayscale(40%) contrast(1.1) brightness(0.9);
    transition: filter var(--transition-speed);
}

.image-wrapper:hover img {
    filter: grayscale(0%) contrast(1) brightness(1);
}

.about-text p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    font-size: 1.05rem;
}

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

.skill-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: 12px;
    transition: transform var(--transition-speed), box-shadow var(--transition-speed);
}

.skill-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.3);
    border-color: rgba(20, 184, 166, 0.3);
}

.skill-icon {
    font-size: 2.5rem;
    color: var(--accent-secondary);
    margin-bottom: 1rem;
}

.skill-card h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
}

.skill-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* =========================================
   Experience Section
   ========================================= */
.timeline {
    position: relative;
    max-width: 800px;
    margin: 0 auto;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 20px;
    top: 0;
    height: 100%;
    width: 2px;
    background: var(--card-border);
}

.timeline-item {
    position: relative;
    padding-left: 60px;
    margin-bottom: 3rem;
}

.timeline-item:last-child {
    margin-bottom: 0;
}

.timeline-dot {
    position: absolute;
    left: 14px;
    top: 5px;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent-primary);
    box-shadow: 0 0 10px var(--accent-primary);
}

.timeline-content {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
    padding: 1.5rem 2rem;
    border-radius: 10px;
    transition: transform var(--transition-speed);
}

.timeline-content:hover {
    transform: translateX(5px);
    border-color: rgba(20, 184, 166, 0.3);
}

.timeline-date {
    display: inline-block;
    color: var(--accent-secondary);
    font-size: 0.9rem;
    font-weight: 600;
    margin-bottom: 0.5rem;
    background: rgba(14, 165, 233, 0.1);
    padding: 0.2rem 0.8rem;
    border-radius: 20px;
}

.timeline-domain {
    color: var(--accent-primary);
    font-size: 0.9rem;
    margin-bottom: 1rem;
    font-weight: 500;
}

.timeline-content p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* =========================================
   Services Section
   ========================================= */
.services-wrapper {
    display: flex;
    justify-content: center;
}

.service-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
    padding: 3rem;
    border-radius: 12px;
    max-width: 800px;
    text-align: left;
    transition: transform var(--transition-speed);
}

.service-card:hover {
    transform: translateY(-5px);
    border-color: rgba(20, 184, 166, 0.3);
}

.service-icon {
    font-size: 3rem;
    margin-bottom: 1.5rem;
}

.service-card h3 {
    font-size: 1.8rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.service-card p {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
}

.service-list {
    color: var(--text-secondary);
}

.service-list li {
    position: relative;
    padding-left: 25px;
    margin-bottom: 0.8rem;
}

.service-list li::before {
    content: '→';
    position: absolute;
    left: 0;
    color: var(--accent-primary);
}

/* =========================================
   Certifications Section
   ========================================= */
.cert-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
}
.cert-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
    padding: 2rem;
    border-radius: 12px;
}
.cert-status {
    display: inline-block;
    padding: 0.3rem 0.8rem;
    border-radius: 20px;
    font-size: 0.8rem;
    font-weight: 600;
    margin-bottom: 1rem;
    background: rgba(148, 163, 184, 0.1);
    color: var(--text-secondary);
}
.cert-status.completed {
    background: rgba(148, 163, 184, 0.1);
    color: var(--text-secondary);
}
.cert-status.inprogress {
    background: rgba(250, 190, 60, 0.12);
    color: #f5c842;
}
.cert-card h3 {
    margin-bottom: 1rem;
    font-size: 1.2rem;
}
.cert-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* Platform breakdown */
.platform-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1.5rem;
    margin-top: 2rem;
}
.platform-card {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
    border-radius: 12px;
    padding: 1.25rem;
}
.platform-header {
    display: flex;
    align-items: center;
    gap: 10px;
    margin-bottom: 10px;
}
.platform-icon {
    width: 30px;
    height: 30px;
    border-radius: 6px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 14px;
    font-weight: 600;
    flex-shrink: 0;
}
.platform-icon.coursera { background: rgba(26, 74, 138, 0.2); color: #4a9eff; }
.platform-icon.udemy    { background: rgba(164, 53, 240, 0.15); color: #c084fc; }
.platform-icon.datacamp { background: rgba(3, 239, 98, 0.12); color: #03ef62; }
.platform-name  { font-size: 14px; font-weight: 600; color: var(--text-primary); }
.platform-count { font-size: 12px; color: var(--text-secondary); }
.course-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 6px;
}
.tag {
    font-size: 11px;
    padding: 3px 9px;
    border-radius: 99px;
    background: rgba(148, 163, 184, 0.08);
    color: var(--text-secondary);
    border: 1px solid var(--card-border);
}

.linkedin-certs-note {
    margin-top: 1.5rem;
    text-align: center;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.linkedin-certs-note a {
    color: var(--accent-secondary);
    font-weight: 500;
    text-decoration: underline;
    text-underline-offset: 3px;
}

.linkedin-certs-note a:hover {
    color: var(--accent-primary);
}

/* =========================================
   Contact Section
   ========================================= */
.contact-subtitle {
    text-align: center;
    color: var(--text-secondary);
    margin-bottom: 3rem;
}

.contact-grid {
    display: block;
}

.contact-info {
    display: flex;
    flex-direction: row;
    justify-content: center;
    gap: 3rem;
    flex-wrap: wrap;
}

.info-item {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.info-icon {
    font-size: 1.5rem;
    color: var(--accent-secondary);
    background: rgba(14, 165, 233, 0.1);
    width: 50px;
    height: 50px;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
}

.info-item h4 {
    margin-bottom: 0.3rem;
}

.info-item p, .info-item a {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.info-item a:hover {
    color: var(--accent-primary);
}

.contact-form {
    background: var(--card-bg);
    border: 1px solid var(--card-border);
    backdrop-filter: blur(10px);
    padding: 2.5rem;
    border-radius: 12px;
}

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

.contact-form input, .contact-form textarea {
    width: 100%;
    padding: 1rem;
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid var(--card-border);
    border-radius: 6px;
    color: var(--text-primary);
    font-family: var(--font-main);
    transition: border-color var(--transition-speed);
}

.contact-form input:focus, .contact-form textarea:focus {
    outline: none;
    border-color: var(--accent-primary);
}

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

/* =========================================
   Animations
   ========================================= */
.reveal {
    opacity: 0;
    transform: translateY(30px);
    transition: opacity 0.8s ease-out, transform 0.8s ease-out;
}

.reveal.active {
    opacity: 1;
    transform: translateY(0);
}

/* =========================================
   Responsive Media Queries
   ========================================= */
@media (max-width: 900px) {
    .about-grid {
        grid-template-columns: 1fr;
    }

    .contact-info {
        flex-direction: column;
        align-items: center;
        gap: 1.5rem;
    }
    
    .hero-title {
        font-size: 4rem;
    }
    
    .hero-subtitle {
        font-size: 2rem;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        right: -100%;
        width: 100%;
        height: calc(100vh - 70px);
        background: rgba(11, 17, 32, 0.95);
        backdrop-filter: blur(10px);
        flex-direction: column;
        align-items: center;
        justify-content: center;
        transition: right var(--transition-speed);
    }
    
    .nav-menu.active {
        right: 0;
    }
    
    .nav-list {
        flex-direction: column;
        text-align: center;
        gap: 2rem;
    }
    
    .nav-cta {
        display: none;
    }
    
    .mobile-menu-toggle {
        display: block;
    }

    .hero-title {
        font-size: 3rem;
    }

    .hero-subtitle {
        font-size: 1.5rem;
    }
    
    .section {
        padding: 60px 0;
    }
}