/* CSS Variables & Theme Setup */
:root {
    /* Color Palette - GitHub Dark Dimmed / IDE Inspired */
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --text-primary: #c9d1d9;
    --text-secondary: #8b949e;
    --accent-color: #58a6ff;
    /* Soft Blue */
    --accent-hover: #79c0ff;
    --border-color: #30363d;
    --code-keyword: #ff7b72;
    --code-string: #a5d6ff;
    --code-function: #d2a8ff;

    /* Typography */
    --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    --font-mono: 'Fira Code', 'Courier New', Courier, monospace;

    /* Spacing & Layout */
    --section-spacing: 120px;
    --container-width: 1100px;
    --header-height: 70px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-smooth: 0.4s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Reset & Base Styles */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: var(--font-sans);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color var(--transition-fast);
}

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

ul {
    list-style: none;
}

h1,
h2,
h3,
h4,
h5,
h6 {
    font-family: var(--font-mono);
    font-weight: 600;
    color: var(--text-primary);
    line-height: 1.25;
}

img {
    max-width: 100%;
    display: block;
}

/* Utilities */
.container {
    max-width: var(--container-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section-title {
    font-size: 2rem;
    margin-bottom: 2rem;
    color: var(--text-primary);
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    display: block;
    width: 60px;
    height: 4px;
    background: var(--accent-color);
    margin-top: 8px;
    border-radius: 2px;
}

.mono {
    font-family: var(--font-mono);
}

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

/* Header & Nav */
body>header {
    height: var(--header-height);
    background: rgba(13, 17, 23, 0.85);
    backdrop-filter: blur(12px);
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    align-items: center;
}

body>header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    width: 100%;
}

.logo {
    font-family: var(--font-mono);
    font-weight: 700;
    font-size: 1.25rem;
    color: var(--text-primary);
}

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

.nav-links {
    display: flex;
    gap: 32px;
}

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

.nav-links a:hover,
.nav-links a.active {
    color: var(--text-primary);
}

.menu-toggle {
    display: none;
    background: none;
    border: none;
    color: var(--text-primary);
    font-size: 1.5rem;
    cursor: pointer;
}

/* Hero Section */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: var(--header-height);
    position: relative;
}

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

.hero-greeting {
    color: var(--accent-color);
    font-family: var(--font-mono);
    font-size: 1.1rem;
    margin-bottom: 1rem;
}

.hero h1 {
    font-size: clamp(40px, 8vw, 80px);
    margin-bottom: 1rem;
}

.hero h2 {
    font-size: clamp(30px, 5vw, 60px);
    color: var(--text-secondary);
    margin-bottom: 2rem;
    font-family: var(--font-sans);
}

.hero p {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 600px;
    margin-bottom: 3rem;
}

.btn {
    display: inline-block;
    padding: 12px 28px;
    border: 1px solid var(--accent-color);
    color: var(--accent-color);
    border-radius: 4px;
    font-family: var(--font-mono);
    font-size: 0.95rem;
    transition: all var(--transition-fast);
}

.btn:hover {
    background: rgba(88, 166, 255, 0.1);
}

/* Expertise / Skills Section */
.expertise {
    padding: var(--section-spacing) 0;
}

/* Accordion Styles */
.skills-accordion {
    max-width: 800px;
    margin: 0 auto;
}

.accordion-item {
    border-bottom: 1px solid var(--border-color);
}

.accordion-header {
    width: 100%;
    padding: 1.5rem 0;
    background: none;
    border: none;
    display: flex;
    justify-content: space-between;
    align-items: center;
    color: var(--text-primary);
    font-size: 1.25rem;
    font-family: var(--font-sans);
    font-weight: 500;
    cursor: none;
    /* Custom cursor handles this */
    text-align: left;
    transition: color 0.3s;
}

.accordion-header span.mono {
    color: var(--accent-color);
    margin-right: 1rem;
    font-size: 0.9em;
}

.accordion-header:hover {
    color: var(--accent-color);
}

.accordion-icon {
    font-family: var(--font-mono);
    font-size: 1.5rem;
    transition: transform 0.3s ease;
}

.accordion-content {
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.4s cubic-bezier(0.4, 0, 0.2, 1);
    opacity: 0;
}

.accordion-content.open {
    /* Max-height set by JS */
    opacity: 1;
    padding-bottom: 2rem;
}

.accordion-header.active .accordion-icon {
    transform: rotate(45deg);
    color: var(--accent-color);
}

/* Skills Grid (Nested) */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 1.5rem;
    padding-top: 1rem;
}

.skill-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 1rem;
    text-align: center;
    border-radius: 6px;
    transition: transform var(--transition-fast), border-color var(--transition-fast);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-primary);
}

.skill-card:hover {
    transform: translateY(-4px);
    border-color: var(--accent-color);
    color: var(--accent-color);
}

/* Projects Section */
.projects {
    padding: var(--section-spacing) 0;
}

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

.project-card-link {
    display: block;
    color: inherit;
    text-decoration: none;
    transition: transform var(--transition-smooth);
}

.project-card-link:hover {
    transform: translateY(-8px);
}

/* Staggered Animation Delays */
.projects-grid>*:nth-child(1) {
    transition-delay: 0.1s;
}

.projects-grid>*:nth-child(2) {
    transition-delay: 0.2s;
}

.projects-grid>*:nth-child(3) {
    transition-delay: 0.3s;
}

.project-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    overflow: hidden;
    height: 100%;
    /* Ensure full height in grid */
    /* transition handled by wrapper link now */
}

/* Remove hover scale from card itself since link handles it */
/* .project-card:hover { transform: translateY(-8px); } */

.project-img-placeholder {
    width: 100%;
    height: 180px;
    background: var(--bg-tertiary);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    border-bottom: 1px solid var(--border-color);
    transition: background-color var(--transition-fast);
}

.project-card-link:hover .project-img-placeholder {
    background-color: #262c36;
    /* Slightly lighter on hover */
    color: var(--accent-color);
}

.project-info {
    padding: 1.5rem;
}

.project-info h3 {
    font-size: 1.25rem;
    margin-bottom: 0.5rem;
}

.project-info p {
    color: var(--text-secondary);
    font-size: 0.95rem;
    margin-bottom: 1.5rem;
}

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

.project-link {
    font-family: var(--font-mono);
    font-size: 0.85rem;
    display: flex;
    align-items: center;
    gap: 6px;
}

/* Experience Accordion Specifics */
.experience-accordion {
    max-width: 800px;
    margin: 0 auto;
}

.experience-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    width: 100%;
}

.experience-header .header-content {
    text-align: left;
}

.experience-header h3 {
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 0.25rem;
}

.experience-header .header-logo {
    width: 40px;
    height: 40px;
    border-radius: 4px;
    margin-right: 1rem;
    object-fit: contain;
    background: white;
    /* Ensure transparency logos are visible */
    padding: 4px;
}

.experience-header .header-content {
    text-align: left;
    display: flex;
    flex-direction: column;
}

/* Flex container for the whole header title part to include logo */
.experience-header-group {
    display: flex;
    align-items: center;
}

.experience-header .timeline-date {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-left: auto;
    margin-right: 2rem;
}

.experience-details {
    padding: 1rem 0;
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.experience-details ul {
    list-style: disc;
    padding-left: 1.25rem;
}

.experience-details li {
    margin-bottom: 0.5rem;
}

@media (max-width: 768px) {
    .experience-header {
        flex-wrap: wrap;
    }

    .experience-header .timeline-date {
        width: 100%;
        margin: 0.5rem 0 0 0;
        text-align: left;
        order: 3;
    }

    .accordion-icon {
        margin-left: auto;
        /* Push icon to right */
    }
}

/* Contact Section */
.contact {
    padding: var(--section-spacing) 0;
    text-align: center;
    max-width: 600px;
    margin: 0 auto;
}

.contact h2 {
    margin-bottom: 1.5rem;
}

.contact p {
    color: var(--text-secondary);
    margin-bottom: 2.5rem;
    font-size: 1.1rem;
}

/* Footer */
footer {
    text-align: center;
    padding: 2rem 0;
    color: var(--text-secondary);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    border-top: 1px solid var(--border-color);
    margin-top: 4rem;
}

/* Scroll Animations */
.fade-in-up {
    opacity: 0;
    transform: translateY(20px);
    transition: opacity 0.6s ease-out, transform 0.6s ease-out;
}

.fade-in-up.visible {
    opacity: 1;
    transform: translateY(0);
}

/* Media Queries */
@media (max-width: 768px) {
    .nav-links {
        display: none;
        flex-direction: column;
        position: absolute;
        top: var(--header-height);
        left: 0;
        width: 100%;
        background: var(--bg-secondary);
        padding: 1rem 0;
        border-bottom: 1px solid var(--border-color);
        box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    }

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

    .nav-links li {
        width: 100%;
        text-align: center;
        padding: 1rem 0;
    }

    .menu-toggle {
        display: block;
    }

    .hero h1 {
        font-size: 48px;
    }

    .timeline {
        padding-left: 1.5rem;
    }

    .section-title {
        font-size: 1.75rem;
    }
}

/* Custom Cursor */
body {
    background: transparent;
    /* Allow video to show through */
    color: var(--text-primary);
    font-family: var(--font-sans);
    line-height: 1.6;
    overflow-x: hidden;
    cursor: none;
}

/* Background Video & Overlay */
#bg-video {
    position: fixed;
    top: 50%;
    left: 50%;
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    z-index: -2;
    transform: translateX(-50%) translateY(-50%);
    object-fit: cover;
}

#video-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(13, 17, 23, 0.8);
    /* Adjusted to 80% opacity */
    z-index: -1;
    backdrop-filter: blur(2px);
    /* Subtle blur for better text readability */
}

/* Certifications Section */
.certifications {
    padding: var(--section-spacing) 0;
}

.certifications-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(280px, 1fr));
    gap: 2rem;
    padding: 2rem 0;
}

.cert-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 2rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.cert-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
    border-color: var(--accent-color);
}

.cert-badge {
    width: 120px;
    height: 120px;
    margin-bottom: 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    background: rgba(255, 255, 255, 0.05);
    border-radius: 50%;
    /* Circular badge container */
    padding: 1rem;
    border: 1px solid var(--border-color);
}

.cert-badge img {
    max-width: 100%;
    max-height: 100%;
    object-fit: contain;
    filter: drop-shadow(0 0 10px rgba(0, 0, 0, 0.5));
}

.cert-info h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    color: var(--text-primary);
}

.cert-issuer {
    font-size: 0.9rem;
    margin-bottom: 0.25rem;
}

.cert-date {
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    opacity: 0.7;
}

.btn-small {
    display: inline-block;
    padding: 0.5rem 1rem;
    font-size: 0.8rem;
    font-family: var(--font-mono);
    color: var(--accent-color);
    border: 1px solid var(--accent-color);
    border-radius: 4px;
    text-decoration: none;
    transition: all 0.3s ease;
}

.btn-small:hover {
    background: rgba(88, 166, 255, 0.1);
    box-shadow: 0 0 15px rgba(88, 166, 255, 0.3);
}

/* Custom Cursor (Redesign - Inertial) */
body {
    cursor: auto;
    /* Fallback: System cursor visible by default */
}

a,
button,
.project-card,
.skill-card,
.accordion-header {
    cursor: pointer;
    /* Fallback */
}

#cursor-dot {
    position: fixed;
    top: 0;
    left: 0;
    width: 12px;
    height: 12px;
    background-color: var(--accent-color);
    /* Cyan so it pops */
    border: 2px solid white;
    border-radius: 50%;
    pointer-events: none;
    z-index: 2147483647;
    transform: translate(-50%, -50%);
    /* mix-blend-mode: difference; REMOVED to avoid invisibility issues */
    transition: transform 0.1s ease;
    display: none;
    /* JS will turn this on */
    box-shadow: 0 0 10px rgba(88, 166, 255, 0.5);
    /* Glow */
}

#cursor-label {
    position: fixed;
    top: 0;
    left: 0;
    color: var(--text-primary);
    font-family: var(--font-mono);
    font-size: 0.8rem;
    padding: 4px 8px;
    background: rgba(13, 17, 23, 0.9);
    border: 1px solid var(--accent-color);
    border-radius: 4px;
    pointer-events: none;
    z-index: 2147483647;
    white-space: nowrap;
    opacity: 0;
    /* Transformation handled by JS for inertia */
}

/* Show label on hover states */
body.hovering #cursor-label {
    opacity: 1;
}

body.hovering #cursor-dot {
    transform: translate(-50%, -50%) scale(1.5);
}

/* Skills Grid (Updated for Icons) */
.skills-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(130px, 1fr));
    gap: 1.5rem;
    padding-top: 1rem;
    padding-bottom: 1rem;
    /* Prevent clipping */
}

.skill-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border-color);
    padding: 1.5rem 1rem;
    text-align: center;
    border-radius: 8px;
    transition: all 0.3s cubic-bezier(0.25, 1, 0.5, 1);
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-secondary);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.skill-card img {
    width: 40px;
    height: 40px;
    transition: transform 0.3s ease;
    filter: grayscale(100%);
    /* Start generic */
    opacity: 0.8;
}

.skill-card i {
    font-size: 2rem;
    color: var(--text-primary);
    transition: color 0.3s ease;
}

.skill-card:hover {
    transform: translateY(-5px);
    border-color: var(--accent-color);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.3);
}

.skill-card:hover img {
    filter: grayscale(0%);
    /* Reveal brand color */
    transform: scale(1.1);
    opacity: 1;
}

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

.skill-card:hover span {
    color: var(--accent-color);
}

/* Fix Accordion Fluidity */
.accordion-content {
    max-height: 0;
    overflow: hidden;
    /* Use a standard ease for reliable closing, custom for opening */
    transition: max-height 0.4s ease-out, opacity 0.4s ease-out;
    opacity: 0;
}

.accordion-content.open {
    opacity: 1;
    /* No padding here to correctly calculate height */
}

/* Hide cursor on touch devices to prevent usability issues */
@media (hover: none) and (pointer: coarse) {

    #cursor-dot,
    #cursor-label {
        display: none;
    }

    body {
        cursor: auto;
    }

    a,
    button,
    .project-card,
    .skill-card {
        cursor: pointer;
    }
}

/* Contact Page Styles */
.contact-page {
    padding-top: calc(var(--header-height) + 40px);
    padding-bottom: var(--section-spacing);
    min-height: 80vh;
}

.contact-intro {
    font-size: 1.1rem;
    color: var(--text-secondary);
    max-width: 700px;
    margin-bottom: 3rem;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.5fr;
    gap: 4rem;
}

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

.contact-list li {
    margin-bottom: 1.5rem;
    font-size: 1rem;
    display: flex;
    align-items: flex-start;
    gap: 1rem;
}

.contact-list i {
    font-size: 1.25rem;
    color: var(--accent-color);
    margin-top: 4px;
    /* Align with text top */
}

.contact-list span.label {
    display: block;
    margin-bottom: 0.25rem;
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.contact-form {
    background: var(--bg-secondary);
    padding: 2rem;
    border-radius: 8px;
    border: 1px solid var(--border-color);
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 12px;
    background: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 4px;
    color: var(--text-primary);
    font-family: var(--font-sans);
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 2px rgba(88, 166, 255, 0.2);
}

/* Back Link for Project Pages */
.back-link {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    margin-bottom: 2rem;
    font-family: var(--font-mono);
    color: var(--accent-color);
    font-weight: 500;
}

.back-link:hover {
    text-decoration: underline;
}

.project-detail-header {
    margin-bottom: 3rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.project-detail-header .section-title {
    margin-bottom: 0.5rem;
    /* Reduced bottom margin since gap handles spacing */
}

.project-meta {
    display: flex;
    gap: 2rem;
    margin-bottom: 2rem;
    font-family: var(--font-mono);
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.project-content img {
    border-radius: 8px;
    border: 1px solid var(--border-color);
    margin-bottom: 2rem;
    width: 100%;
}

@media (max-width: 768px) {
    .contact-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .project-meta {
        flex-direction: column;
        gap: 1rem;
    }
}