/* ============================================================
   Lokesh Solanki Portfolio — Global Stylesheet
   Dark cloud-engineer aesthetic · No CSS frameworks
   ============================================================ */

/* --- CSS Variables --- */
:root {
    --bg-deep: #0a0f1e;
    --bg-surface: #111827;
    --bg-card: #151d2e;
    --bg-card-hover: #1a2438;
    --accent: #00c8ff;
    --accent-dim: rgba(0, 200, 255, 0.15);
    --accent-glow: rgba(0, 200, 255, 0.35);
    --text-primary: #f0f4f8;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    --border: rgba(255, 255, 255, 0.08);
    --border-accent: rgba(0, 200, 255, 0.25);
    --font-body: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    --font-heading: 'Space Grotesk', sans-serif;
    --nav-height: 72px;
    --radius: 12px;
    --radius-lg: 20px;
    --transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --max-width: 1140px;
}

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

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-body);
    background-color: var(--bg-deep);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    overflow-x: hidden;
}

main {
    flex: 1;
    position: relative;
    z-index: 1;
}

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

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

a:hover {
    color: #5ee4ff;
}

ul {
    list-style: none;
}

.container {
    width: 100%;
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
}

/* --- Typography --- */
h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 600;
    line-height: 1.2;
}

.section-eyebrow {
    font-size: 0.8rem;
    font-weight: 500;
    letter-spacing: 0.12em;
    text-transform: uppercase;
    color: var(--accent);
    margin-bottom: 0.75rem;
}

.page-title {
    font-size: clamp(2rem, 5vw, 3rem);
    letter-spacing: -0.02em;
}

.page-subtitle {
    color: var(--text-secondary);
    margin-top: 0.75rem;
    max-width: 520px;
}

.section-title {
    font-size: clamp(1.5rem, 3vw, 2rem);
    margin-bottom: 2rem;
}

/* --- Navbar --- */
.navbar {
    position: sticky;
    top: 0;
    z-index: 100;
    height: var(--nav-height);
    background: rgba(10, 15, 30, 0.85);
    backdrop-filter: blur(16px);
    -webkit-backdrop-filter: blur(16px);
    border-bottom: 1px solid var(--border);
}

.nav-container {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
    height: 100%;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.nav-logo {
    font-family: var(--font-heading);
    font-size: 1.15rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.01em;
    transition: color var(--transition);
}

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

.nav-links {
    display: flex;
    align-items: center;
    gap: 0.25rem;
}

.nav-link {
    position: relative;
    color: var(--text-secondary);
    font-size: 0.875rem;
    font-weight: 500;
    padding: 0.5rem 0.85rem;
    border-radius: 8px;
    transition: color var(--transition), background var(--transition);
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 2px;
    left: 50%;
    width: 0;
    height: 2px;
    background: var(--accent);
    transition: width var(--transition), left var(--transition);
    border-radius: 2px;
}

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

.nav-link:hover::after,
.nav-link.active::after {
    width: 60%;
    left: 20%;
}

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

/* Hamburger toggle */
.nav-toggle {
    display: none;
    background: none;
    border: none;
    cursor: pointer;
    padding: 0.5rem;
    z-index: 110;
}

.hamburger,
.hamburger::before,
.hamburger::after {
    display: block;
    width: 24px;
    height: 2px;
    background: var(--text-primary);
    border-radius: 2px;
    transition: transform var(--transition), opacity var(--transition);
}

.hamburger {
    position: relative;
}

.hamburger::before,
.hamburger::after {
    content: '';
    position: absolute;
    left: 0;
}

.hamburger::before { top: -7px; }
.hamburger::after { top: 7px; }

.nav-toggle[aria-expanded="true"] .hamburger {
    background: transparent;
}

.nav-toggle[aria-expanded="true"] .hamburger::before {
    transform: rotate(45deg) translate(5px, 5px);
}

.nav-toggle[aria-expanded="true"] .hamburger::after {
    transform: rotate(-45deg) translate(5px, -5px);
}

/* --- Buttons --- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-family: var(--font-body);
    font-size: 0.9rem;
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    border-radius: 10px;
    border: 2px solid transparent;
    cursor: pointer;
    transition: all var(--transition);
    text-decoration: none;
}

.btn-primary {
    background: var(--accent);
    color: var(--bg-deep);
    border-color: var(--accent);
}

.btn-primary:hover {
    background: #33d4ff;
    border-color: #33d4ff;
    color: var(--bg-deep);
    box-shadow: 0 0 24px var(--accent-glow);
}

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

.btn-outline:hover {
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: 0 0 20px var(--accent-dim);
}

.btn-sm {
    font-size: 0.8rem;
    padding: 0.5rem 1rem;
}

/* --- Footer --- */
.site-footer {
    position: relative;
    z-index: 1;
    border-top: 1px solid var(--border);
    padding: 1.75rem 0;
    margin-top: 4rem;
}

.footer-inner {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: 0 1.5rem;
    text-align: center;
}

.site-footer p {
    font-size: 0.85rem;
    color: var(--text-muted);
}

/* --- Animations --- */
.fade-in {
    animation: fadeInUp 0.8s ease forwards;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(24px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.reveal {
    opacity: 0;
    transform: translateY(28px);
    transition: opacity 0.6s ease, transform 0.6s ease;
}

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

/* --- Hero (Home) --- */
.hero {
    min-height: calc(100vh - var(--nav-height));
    display: flex;
    flex-direction: column;
    justify-content: center;
    padding: 3rem 1.5rem 4rem;
    max-width: var(--max-width);
    margin: 0 auto;
    position: relative;
}

.hero-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 3rem;
    align-items: center;
}

.hero-eyebrow {
    font-size: 0.9rem;
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
}

.hero-name {
    font-size: clamp(2.5rem, 6vw, 4rem);
    letter-spacing: -0.03em;
    margin-bottom: 1rem;
    background: linear-gradient(135deg, var(--text-primary) 0%, var(--accent) 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-tagline {
    font-family: var(--font-heading);
    font-size: clamp(1.1rem, 2.5vw, 1.4rem);
    color: var(--accent);
    min-height: 2rem;
    margin-bottom: 0.75rem;
}

.typing-cursor {
    animation: blink 1s step-end infinite;
    color: var(--accent);
    font-weight: 300;
}

#typingText {
    position: relative;
    display: inline-block;
    padding: 0 0.2rem;
    transition: color var(--transition);
}

#typingText::before {
    content: '';
    position: absolute;
    inset: -0.2rem -0.35rem;
    border-radius: 16px;
    border: 1px solid rgba(0, 200, 255, 0.16);
    background: rgba(0, 200, 255, 0.08);
    opacity: 0;
    transform: scale(0.95);
    transition: opacity 0.18s ease, transform 0.18s ease;
    pointer-events: none;
}

#typingText.typing-reflect::before {
    opacity: 1;
    transform: scale(1);
}

@keyframes blink {
    50% { opacity: 0; }
}

.hero-sub {
    color: var(--text-secondary);
    font-size: 1rem;
    margin-bottom: 2rem;
}

.hero-cta {
    display: flex;
    flex-wrap: wrap;
    gap: 1rem;
}

.hero-photo-wrap {
    position: relative;
    display: flex;
    justify-content: center;
    align-items: center;
}

.photo-glow {
    position: absolute;
    width: 280px;
    height: 280px;
    border-radius: 50%;
    background: radial-gradient(circle, var(--accent-glow) 0%, transparent 70%);
    filter: blur(30px);
    animation: pulseGlow 4s ease-in-out infinite;
}

.photo-glow--sm {
    width: 240px;
    height: 240px;
}

@keyframes pulseGlow {
    0%, 100% { opacity: 0.6; transform: scale(1); }
    50% { opacity: 1; transform: scale(1.05); }
}

.hero-photo {
    position: relative;
    width: 280px;
    height: 280px;
    border-radius: 50%;
    object-fit: cover;
    border: 3px solid var(--border-accent);
    box-shadow: 0 0 40px var(--accent-dim), inset 0 0 20px rgba(0, 200, 255, 0.05);
}

.hero-accent-line {
    position: absolute;
    bottom: 2rem;
    left: 1.5rem;
    right: 1.5rem;
    height: 1px;
    background: linear-gradient(90deg, var(--accent), transparent 60%);
    opacity: 0.4;
}

/* Home highlights */
.home-highlights {
    padding: 2rem 0 4rem;
}

.highlight-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.5rem;
}

.highlight-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.75rem;
    transition: border-color var(--transition), transform var(--transition);
}

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

.highlight-num {
    font-family: var(--font-heading);
    font-size: 0.75rem;
    color: var(--accent);
    letter-spacing: 0.1em;
    display: block;
    margin-bottom: 1rem;
}

.highlight-card h3 {
    font-size: 1.1rem;
    margin-bottom: 0.5rem;
}

.highlight-card p {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

/* --- Page Header --- */
.page-header {
    padding: 4rem 0 2rem;
}

/* --- About --- */
.about-section {
    padding: 2rem 0 4rem;
}

.about-grid {
    display: grid;
    grid-template-columns: 280px 1fr;
    gap: 3rem;
    align-items: start;
}

.about-photo-col {
    position: relative;
    display: flex;
    justify-content: center;
}

.about-photo {
    position: relative;
    width: 260px;
    height: 260px;
    border-radius: var(--radius-lg);
    object-fit: cover;
    border: 2px solid var(--border-accent);
    box-shadow: 0 0 30px var(--accent-dim);
}

.about-bio {
    font-size: 1.05rem;
    color: var(--text-secondary);
    line-height: 1.8;
    margin-bottom: 2rem;
}

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

.social-link {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.65rem 1.25rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: 10px;
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 500;
    transition: all var(--transition);
}

.social-link svg {
    width: 18px;
    height: 18px;
}

.social-link:hover {
    border-color: var(--accent);
    color: var(--accent);
    box-shadow: 0 0 16px var(--accent-dim);
}

/* Quick Facts */
.facts-section {
    padding: 2rem 0 4rem;
}

.facts-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}

.fact-card {
    display: flex;
    align-items: flex-start;
    gap: 1rem;
    padding: 1.25rem 1.5rem;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    transition: border-color var(--transition);
}

.fact-card:hover {
    border-color: var(--border-accent);
}

.fact-icon {
    font-size: 1.25rem;
    flex-shrink: 0;
    margin-top: 0.1rem;
}

.fact-label {
    display: block;
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.08em;
    color: var(--text-muted);
    margin-bottom: 0.25rem;
}

.fact-value,
.fact-link {
    font-size: 0.9rem;
    color: var(--text-primary);
}

.fact-link:hover {
    color: var(--accent);
}

/* --- Skills --- */
.skills-section {
    padding: 1rem 0 4rem;
}

.skills-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.skill-category {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.skill-category:hover {
    border-color: var(--border-accent);
    box-shadow: 0 8px 32px rgba(0, 0, 0, 0.3);
}

.skill-category--wide {
    grid-column: 1 / -1;
}

.skill-category-header {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.skill-category-icon {
    font-size: 1.25rem;
}

.skill-category h2 {
    font-size: 1.1rem;
}

.skill-pills {
    display: flex;
    flex-wrap: wrap;
    gap: 0.6rem;
}

.skill-pill {
    display: inline-block;
    font-size: 0.8rem;
    font-weight: 500;
    padding: 0.45rem 0.9rem;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 100px;
    color: var(--text-secondary);
    transition: all var(--transition);
    cursor: default;
}

.skill-pill:hover {
    color: var(--accent);
    border-color: var(--accent);
    box-shadow: 0 0 14px var(--accent-dim);
    background: rgba(0, 200, 255, 0.06);
}

/* --- Experience Timeline --- */
.timeline-section {
    padding: 1rem 0 4rem;
}

.timeline {
    position: relative;
    padding-left: 2rem;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 6px;
    top: 0;
    bottom: 0;
    width: 2px;
    background: linear-gradient(180deg, var(--accent), var(--border));
}

.timeline-item {
    position: relative;
    padding-bottom: 2.5rem;
}

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

.timeline-marker {
    position: absolute;
    left: -2rem;
    top: 0.5rem;
    width: 14px;
    height: 14px;
    border-radius: 50%;
    background: var(--accent);
    border: 3px solid var(--bg-deep);
    box-shadow: 0 0 12px var(--accent-glow);
}

.timeline-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.75rem 2rem;
    margin-left: 0.5rem;
    transition: border-color var(--transition);
}

.timeline-card:hover {
    border-color: var(--border-accent);
}

.timeline-duration {
    font-size: 0.8rem;
    font-weight: 600;
    color: var(--accent);
    letter-spacing: 0.05em;
}

.timeline-role {
    font-size: 1.25rem;
    margin: 0.5rem 0 0.25rem;
}

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

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

.timeline-points li {
    position: relative;
    padding-left: 1.25rem;
    margin-bottom: 0.65rem;
    font-size: 0.9rem;
    color: var(--text-secondary);
    line-height: 1.65;
}

.timeline-points li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0.55rem;
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: var(--accent);
    opacity: 0.6;
}

.timeline-placeholder {
    font-style: italic;
    color: var(--text-muted);
}

/* --- Projects --- */
.projects-section {
    padding: 1rem 0 4rem;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 1.5rem;
}

.project-card {
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 1.75rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
    transition: border-color var(--transition), transform var(--transition);
}

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

.project-title {
    font-size: 1.15rem;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 0.4rem;
    margin-top: 0.5rem;
}

.project-tag {
    font-size: 0.7rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    padding: 0.25rem 0.6rem;
    background: var(--accent-dim);
    color: var(--accent);
    border-radius: 6px;
}

.project-desc {
    font-size: 0.9rem;
    color: var(--text-secondary);
    flex: 1;
    line-height: 1.7;
}

.project-actions {
    display: flex;
    gap: 0.75rem;
    margin-top: auto;
}

/* --- Certificates --- */
.certificates-section,
.achievements-section {
    padding: 1rem 0 2rem;
}

.achievements-section {
    padding-bottom: 4rem;
}

.cert-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 1.25rem;
}

.cert-card {
    position: relative;
    background: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius);
    padding: 1.75rem;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.cert-card:hover {
    border-color: var(--border-accent);
    box-shadow: 0 0 24px var(--accent-dim);
}

.cert-icon {
    font-size: 1.75rem;
    margin-bottom: 1rem;
}

.cert-title {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    line-height: 1.4;
}

.cert-issuer {
    font-size: 0.85rem;
    color: var(--text-muted);
}

.cert-card--achievement {
    padding-top: 2.25rem;
}

.achievement-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    font-size: 0.7rem;
    font-weight: 600;
    padding: 0.25rem 0.6rem;
    background: rgba(255, 200, 0, 0.12);
    color: #ffc800;
    border: 1px solid rgba(255, 200, 0, 0.25);
    border-radius: 100px;
}

/* --- Contact --- */
.contact-section {
    padding: 1rem 0 4rem;
}

.contact-grid {
    display: grid;
    grid-template-columns: 1fr 1.4fr;
    gap: 3rem;
    align-items: start;
}

.contact-info-title {
    font-size: 1.25rem;
    margin-bottom: 1.5rem;
}

.contact-info-list li {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    margin-bottom: 1.25rem;
}

.contact-info-icon {
    font-size: 1.1rem;
    flex-shrink: 0;
}

.contact-info-list a {
    color: var(--text-secondary);
    font-size: 0.95rem;
    transition: color var(--transition);
}

.contact-info-list a:hover {
    color: var(--accent);
}

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

.form-group {
    margin-bottom: 1.25rem;
}

.form-group label {
    display: block;
    font-size: 0.85rem;
    font-weight: 500;
    margin-bottom: 0.4rem;
    color: var(--text-secondary);
}

.required {
    color: var(--accent);
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 0.75rem 1rem;
    background: var(--bg-surface);
    border: 1px solid var(--border);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: var(--font-body);
    font-size: 0.9rem;
    transition: border-color var(--transition), box-shadow var(--transition);
}

.form-group input:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent);
    box-shadow: 0 0 0 3px var(--accent-dim);
}

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

.form-group textarea {
    resize: vertical;
    min-height: 120px;
}

.form-actions {
    margin-top: 1.5rem;
}

.form-feedback {
    margin-top: 1rem;
    font-size: 0.875rem;
    min-height: 1.25rem;
}

.form-feedback.success {
    color: #4ade80;
}

.form-feedback.error {
    color: #f87171;
}

.contact-form .btn[disabled] {
    opacity: 0.6;
    cursor: not-allowed;
}

/* --- Responsive --- */
@media (max-width: 992px) {
    .hero-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .hero-photo-wrap {
        order: -1;
    }

    .hero-cta {
        justify-content: center;
    }

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

    .about-grid {
        grid-template-columns: 1fr;
        text-align: center;
    }

    .about-photo-col {
        margin: 0 auto;
    }

    .social-links {
        justify-content: center;
    }

    .facts-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

    .skill-category--wide {
        grid-column: auto;
    }

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

    .cert-grid {
        grid-template-columns: repeat(2, 1fr);
    }

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

@media (max-width: 768px) {
    .nav-toggle {
        display: block;
    }

    .nav-links {
        position: fixed;
        top: 0;
        right: 0;
        width: min(280px, 85vw);
        height: 100vh;
        flex-direction: column;
        align-items: stretch;
        justify-content: center;
        gap: 0.25rem;
        padding: 2rem;
        background: rgba(10, 15, 30, 0.97);
        backdrop-filter: blur(20px);
        border-left: 1px solid var(--border);
        transform: translateX(100%);
        transition: transform var(--transition);
    }

    .nav-links.open {
        transform: translateX(0);
    }

    .nav-link {
        padding: 0.85rem 1rem;
        font-size: 1rem;
    }

    .nav-link::after {
        display: none;
    }

    .nav-link.active {
        background: var(--accent-dim);
    }

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

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

    .hero {
        min-height: auto;
        padding-top: 2rem;
    }

    .hero-photo {
        width: 220px;
        height: 220px;
    }

    .photo-glow {
        width: 220px;
        height: 220px;
    }
}

@media (max-width: 480px) {
    .hero-name {
        font-size: 2rem;
    }

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

    .hero-cta .btn {
        width: 100%;
    }

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

    .project-actions .btn {
        width: 100%;
    }
}