/* ==========================================================================
   JV Martins - Professional Portfolio
   Design: Dark, Modern, Professional
   ========================================================================== */

/* --------------------------------------------------------------------------
   CSS Variables
   -------------------------------------------------------------------------- */
:root {
    /* Colors */
    --color-bg-primary: #0a0a0b;
    --color-bg-secondary: #111113;
    --color-bg-tertiary: #1a1a1d;
    --color-bg-card: #141416;

    --color-text-primary: #ffffff;
    --color-text-secondary: #a1a1aa;
    --color-text-muted: #71717a;

    --color-accent: #3b82f6;
    --color-accent-hover: #2563eb;
    --color-accent-light: rgba(59, 130, 246, 0.1);

    --color-border: #27272a;
    --color-border-light: #3f3f46;

    /* Typography */
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;

    /* Spacing */
    --section-padding: 120px;
    --container-max-width: 1200px;

    /* Transitions */
    --transition-fast: 0.2s ease;
    --transition-medium: 0.3s ease;
    --transition-slow: 0.5s ease;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 16px;
    --radius-xl: 24px;
}

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

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

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

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

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

ul {
    list-style: none;
}

/* --------------------------------------------------------------------------
   Layout
   -------------------------------------------------------------------------- */
.container {
    width: 100%;
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 24px;
}

.section {
    padding: var(--section-padding) 0;
}

/* --------------------------------------------------------------------------
   Typography
   -------------------------------------------------------------------------- */
.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: 16px;
    position: relative;
    display: inline-block;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: -8px;
    left: 0;
    width: 60px;
    height: 4px;
    background: var(--color-accent);
    border-radius: 2px;
}

.section-subtitle {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    margin-bottom: 60px;
    max-width: 600px;
}

/* --------------------------------------------------------------------------
   Navigation
   -------------------------------------------------------------------------- */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 10, 11, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--color-border);
    transition: all var(--transition-medium);
}

.navbar.scrolled {
    background: rgba(10, 10, 11, 0.95);
}

.nav-container {
    max-width: var(--container-max-width);
    margin: 0 auto;
    padding: 0 24px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: 72px;
}

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

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

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

.nav-link {
    font-size: 0.875rem;
    font-weight: 500;
    color: var(--color-text-secondary);
    padding: 8px 0;
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--color-accent);
    transition: width var(--transition-medium);
}

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

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

.nav-toggle {
    display: none;
    flex-direction: column;
    gap: 5px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.nav-toggle span {
    width: 24px;
    height: 2px;
    background: var(--color-text-primary);
    transition: all var(--transition-fast);
}

/* --------------------------------------------------------------------------
   Hero Section
   -------------------------------------------------------------------------- */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 72px;
    position: relative;
    background:
        radial-gradient(ellipse at 20% 50%, rgba(59, 130, 246, 0.08) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(59, 130, 246, 0.05) 0%, transparent 40%),
        var(--color-bg-primary);
}

.hero-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
    align-items: center;
}

.hero-greeting {
    font-size: 1rem;
    color: var(--color-accent);
    font-weight: 500;
    margin-bottom: 12px;
    letter-spacing: 0.5px;
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 700;
    line-height: 1.1;
    margin-bottom: 8px;
}

.hero-subtitle {
    font-size: clamp(1.25rem, 3vw, 1.75rem);
    color: var(--color-text-secondary);
    font-weight: 400;
    margin-bottom: 24px;
    min-height: 2rem;
}

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

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

@keyframes blink {
    0%, 50% { opacity: 1; }
    51%, 100% { opacity: 0; }
}

.hero-description {
    font-size: 1.125rem;
    color: var(--color-text-secondary);
    line-height: 1.8;
    margin-bottom: 32px;
    max-width: 500px;
}

.hero-description strong {
    color: var(--color-text-primary);
    font-weight: 600;
}

.hero-cta {
    display: flex;
    gap: 16px;
    margin-bottom: 48px;
}

.hero-stats {
    display: flex;
    gap: 40px;
}

.stat {
    display: flex;
    flex-direction: column;
}

.stat-number {
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-accent);
}

.stat-label {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.hero-image {
    display: flex;
    justify-content: center;
}

.image-wrapper {
    position: relative;
    width: 380px;
    height: 450px;
}

.profile-photo {
    width: 100%;
    height: 100%;
    object-fit: cover;
    border-radius: var(--radius-xl);
    position: relative;
    z-index: 2;
    filter: grayscale(20%);
    transition: filter var(--transition-medium);
}

.profile-photo:hover {
    filter: grayscale(0%);
}

.profile-placeholder {
    width: 100%;
    height: 100%;
    border-radius: var(--radius-xl);
    position: relative;
    z-index: 2;
    background: linear-gradient(135deg, var(--color-bg-tertiary) 0%, var(--color-bg-secondary) 100%);
    display: flex;
    align-items: center;
    justify-content: center;
    border: 1px solid var(--color-border);
}

.profile-placeholder span {
    font-size: 6rem;
    font-weight: 700;
    color: var(--color-accent);
    opacity: 0.8;
}

.image-decoration {
    position: absolute;
    top: 20px;
    left: 20px;
    right: -20px;
    bottom: -20px;
    border: 2px solid var(--color-accent);
    border-radius: var(--radius-xl);
    z-index: 1;
}

.hero-scroll {
    position: absolute;
    bottom: 40px;
    left: 50%;
    transform: translateX(-50%);
}

@media (max-width: 768px) {
    .hero-scroll {
        display: none;
    }
}

.scroll-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 8px;
    color: var(--color-text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 2px;
}

.scroll-arrow {
    width: 24px;
    height: 40px;
    border: 2px solid var(--color-border-light);
    border-radius: 12px;
    position: relative;
}

.scroll-arrow::after {
    content: '';
    position: absolute;
    top: 8px;
    left: 50%;
    transform: translateX(-50%);
    width: 4px;
    height: 8px;
    background: var(--color-accent);
    border-radius: 2px;
    animation: scroll 2s infinite;
}

@keyframes scroll {
    0%, 100% { opacity: 1; top: 8px; }
    50% { opacity: 0.5; top: 20px; }
}

/* --------------------------------------------------------------------------
   Buttons
   -------------------------------------------------------------------------- */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 8px;
    padding: 14px 28px;
    font-size: 0.9375rem;
    font-weight: 500;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    border: none;
}

.btn-primary {
    background: var(--color-accent);
    color: white;
}

.btn-primary:hover {
    background: var(--color-accent-hover);
    transform: translateY(-2px);
    box-shadow: 0 10px 30px rgba(59, 130, 246, 0.3);
}

.btn-secondary {
    background: transparent;
    color: var(--color-text-primary);
    border: 1px solid var(--color-border-light);
}

.btn-secondary:hover {
    background: var(--color-bg-tertiary);
    border-color: var(--color-text-muted);
}

.btn-outline {
    background: transparent;
    color: var(--color-accent);
    border: 1px solid var(--color-accent);
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

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

.btn-outline svg {
    transition: transform var(--transition-fast);
}

.btn-outline:hover svg {
    transform: translateY(2px);
}

/* --------------------------------------------------------------------------
   About Section
   -------------------------------------------------------------------------- */
.about {
    background: var(--color-bg-secondary);
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 80px;
}

.about-text {
    font-size: 1.0625rem;
    color: var(--color-text-secondary);
}

.about-text p {
    margin-bottom: 20px;
    line-height: 1.8;
}

.about-intro {
    font-size: 1.25rem;
    color: var(--color-text-primary);
}

.about-text strong {
    color: var(--color-text-primary);
    font-weight: 600;
}

.about-languages {
    margin-top: 40px;
    padding-top: 24px;
    border-top: 1px solid var(--color-border);
}

.about-languages h3 {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-text-muted);
    margin-bottom: 16px;
}

.languages-list {
    display: flex;
    flex-wrap: wrap;
    gap: 16px;
}

.language {
    padding: 8px 16px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    font-size: 0.9375rem;
}

.language small {
    color: var(--color-text-muted);
    margin-left: 4px;
}

.about-skills h3 {
    font-size: 1.25rem;
    margin-bottom: 24px;
}

.skills-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.skill-category {
    padding: 24px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-lg);
    border: 1px solid var(--color-border);
}

.skill-category h4 {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-accent);
    margin-bottom: 16px;
}

.skill-category ul {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.skill-category li {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    padding-left: 16px;
    position: relative;
}

.skill-category li::before {
    content: '';
    position: absolute;
    left: 0;
    top: 10px;
    width: 6px;
    height: 6px;
    background: var(--color-border-light);
    border-radius: 50%;
}

/* --------------------------------------------------------------------------
   Experience Section
   -------------------------------------------------------------------------- */
.experience {
    background: var(--color-bg-primary);
}

.timeline {
    position: relative;
    max-width: 800px;
}

.timeline::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 2px;
    background: var(--color-border);
}

.timeline-item {
    position: relative;
    padding-left: 40px;
    padding-bottom: 48px;
}

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

.timeline-marker {
    position: absolute;
    left: -6px;
    top: 0;
    width: 14px;
    height: 14px;
    background: var(--color-bg-primary);
    border: 2px solid var(--color-accent);
    border-radius: 50%;
}

.timeline-content {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: all var(--transition-medium);
}

.timeline-content:hover {
    border-color: var(--color-border-light);
    transform: translateX(8px);
}

.timeline-header {
    margin-bottom: 16px;
}

.timeline-header h3 {
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 4px;
}

.timeline-role {
    display: block;
    font-size: 1rem;
    color: var(--color-accent);
    margin-bottom: 4px;
}

.timeline-period {
    display: inline-block;
    font-size: 0.875rem;
    color: var(--color-text-muted);
    padding: 4px 12px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-sm);
}

.timeline-body p {
    color: var(--color-text-secondary);
    margin-bottom: 16px;
    line-height: 1.7;
}

.timeline-impacts h4 {
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 1px;
    color: var(--color-text-muted);
    margin-bottom: 12px;
}

.timeline-impacts ul {
    display: flex;
    flex-direction: column;
    gap: 8px;
}

.timeline-impacts li {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    padding-left: 20px;
    position: relative;
}

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

/* --------------------------------------------------------------------------
   Projects Section
   -------------------------------------------------------------------------- */
.projects {
    background: var(--color-bg-secondary);
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 24px;
}

.project-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px;
    transition: all var(--transition-medium);
}

.project-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.3);
}

.project-icon {
    width: 56px;
    height: 56px;
    background: var(--color-accent-light);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 20px;
    color: var(--color-accent);
}

.project-card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.project-card p {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    margin-bottom: 16px;
    line-height: 1.6;
}

.project-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.project-tags span {
    padding: 4px 12px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-sm);
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.project-result {
    padding-top: 16px;
    border-top: 1px solid var(--color-border);
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

.project-result strong {
    color: var(--color-accent);
}

/* --------------------------------------------------------------------------
   Work Together Section
   -------------------------------------------------------------------------- */
.work-together {
    background: var(--color-bg-primary);
}

.work-models {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 24px;
    margin-bottom: 80px;
}

.work-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 40px 32px;
    text-align: center;
    transition: all var(--transition-medium);
    position: relative;
}

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

.work-card.featured {
    border-color: var(--color-accent);
    background: linear-gradient(180deg, var(--color-accent-light) 0%, var(--color-bg-card) 100%);
}

/* Remove featured border when another card is selected */
.work-models.has-selection .work-card.featured:not(.selected) {
    border-color: var(--color-border);
    background: var(--color-bg-card);
}

.work-badge {
    position: absolute;
    top: -12px;
    left: 50%;
    transform: translateX(-50%);
    padding: 6px 16px;
    background: var(--color-accent);
    color: white;
    font-size: 0.75rem;
    font-weight: 600;
    border-radius: var(--radius-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.work-icon {
    width: 72px;
    height: 72px;
    background: var(--color-bg-tertiary);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin: 0 auto 24px;
    color: var(--color-accent);
}

.work-card h3 {
    font-size: 1.25rem;
    margin-bottom: 12px;
}

.work-card > p {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    margin-bottom: 24px;
    line-height: 1.6;
}

.work-benefits {
    text-align: left;
    margin-bottom: 24px;
}

.work-benefits li {
    padding: 8px 0;
    padding-left: 24px;
    position: relative;
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    border-bottom: 1px solid var(--color-border);
}

.work-benefits li:last-child {
    border-bottom: none;
}

.work-benefits li::before {
    content: '✓';
    position: absolute;
    left: 0;
    color: var(--color-accent);
    font-weight: 600;
}

.work-ideal {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
    font-style: italic;
}

/* Differentials */
.differentials {
    margin-bottom: 80px;
}

.differentials h3 {
    font-size: 1.5rem;
    text-align: center;
    margin-bottom: 48px;
}

.diff-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 32px;
}

.diff-item {
    text-align: center;
}

.diff-number {
    display: block;
    font-size: 3rem;
    font-weight: 700;
    color: var(--color-border-light);
    margin-bottom: 16px;
}

.diff-item h4 {
    font-size: 1rem;
    margin-bottom: 8px;
}

.diff-item p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
    line-height: 1.6;
}

/* Contact CTA */
.contact-cta {
    text-align: center;
    padding: 60px;
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-xl);
}

.contact-cta h3 {
    font-size: 1.75rem;
    margin-bottom: 16px;
}

.contact-cta > p {
    font-size: 1.0625rem;
    color: var(--color-text-secondary);
    margin-bottom: 32px;
}

.contact-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
}

/* --------------------------------------------------------------------------
   Footer
   -------------------------------------------------------------------------- */
.footer {
    background: var(--color-bg-secondary);
    border-top: 1px solid var(--color-border);
    padding: 60px 0 24px;
}

.footer-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 40px;
    border-bottom: 1px solid var(--color-border);
    margin-bottom: 24px;
}

.footer-logo {
    font-size: 1.5rem;
    font-weight: 700;
}

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

.footer-brand p {
    margin-top: 8px;
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

.footer-links {
    display: flex;
    gap: 24px;
}

.footer-links a {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
}

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

.footer-bottom {
    text-align: center;
}

.footer-bottom p {
    font-size: 0.875rem;
    color: var(--color-text-muted);
}

/* --------------------------------------------------------------------------
   Responsive Design
   -------------------------------------------------------------------------- */
@media (max-width: 1024px) {
    .hero-content {
        grid-template-columns: 1fr;
        gap: 60px;
        text-align: center;
    }

    .hero-text {
        order: 2;
    }

    .hero-image {
        order: 1;
    }

    .hero-description {
        max-width: 100%;
    }

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

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

    .image-wrapper {
        width: 300px;
        height: 360px;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 48px;
    }

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

    .work-models {
        grid-template-columns: 1fr;
        max-width: 400px;
        margin-left: auto;
        margin-right: auto;
    }

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

@media (max-width: 768px) {
    :root {
        --section-padding: 80px;
    }

    .nav-menu {
        position: fixed;
        top: 72px;
        left: 0;
        right: 0;
        background: var(--color-bg-secondary);
        flex-direction: column;
        align-items: center;
        padding: 40px 24px;
        gap: 24px;
        border-bottom: 1px solid var(--color-border);
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition-medium);
    }

    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }

    .nav-toggle {
        display: flex;
    }

    .nav-toggle.active span:nth-child(1) {
        transform: rotate(45deg) translate(5px, 5px);
    }

    .nav-toggle.active span:nth-child(2) {
        opacity: 0;
    }

    .nav-toggle.active span:nth-child(3) {
        transform: rotate(-45deg) translate(5px, -5px);
    }

    .hero-stats {
        flex-direction: column;
        gap: 24px;
    }

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

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

    .contact-cta {
        padding: 40px 24px;
    }

    .contact-buttons {
        flex-direction: column;
    }

    .footer-content {
        flex-direction: column;
        gap: 24px;
        text-align: center;
    }
}

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

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

    .btn {
        width: 100%;
    }

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

    .language-toggle {
        margin-right: 8px;
    }
}

/* --------------------------------------------------------------------------
   Language Toggle
   -------------------------------------------------------------------------- */
.nav-actions {
    display: flex;
    align-items: center;
    gap: 16px;
}

.language-toggle {
    display: flex;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-md);
    padding: 4px;
    border: 1px solid var(--color-border);
}

.lang-btn {
    padding: 6px 12px;
    font-size: 0.8125rem;
    font-weight: 600;
    color: var(--color-text-muted);
    background: transparent;
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

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

.lang-btn.active {
    background: var(--color-accent);
    color: white;
}

/* --------------------------------------------------------------------------
   WhatsApp Float Button
   -------------------------------------------------------------------------- */
.whatsapp-float {
    position: fixed;
    bottom: 24px;
    right: 24px;
    width: 56px;
    height: 56px;
    background: #25D366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    box-shadow: 0 4px 20px rgba(37, 211, 102, 0.4);
    z-index: 999;
    transition: all var(--transition-medium);
}

.whatsapp-float:hover {
    transform: scale(1.1);
    box-shadow: 0 6px 30px rgba(37, 211, 102, 0.5);
}

/* --------------------------------------------------------------------------
   Contact Buttons Styles
   -------------------------------------------------------------------------- */
.btn-whatsapp {
    background: #25D366;
}

.btn-whatsapp:hover {
    background: #128C7E;
    box-shadow: 0 10px 30px rgba(37, 211, 102, 0.3);
}

.btn-linkedin {
    border-color: #0A66C2;
    color: #0A66C2;
}

.btn-linkedin:hover {
    background: #0A66C2;
    color: white;
}

/* --------------------------------------------------------------------------
   Mobile Responsive for Language Toggle
   -------------------------------------------------------------------------- */
@media (max-width: 768px) {
    .nav-actions {
        gap: 8px;
    }

    .language-toggle {
        order: -1;
    }

    .lang-btn {
        padding: 4px 8px;
        font-size: 0.75rem;
    }

    .whatsapp-float {
        bottom: 16px;
        right: 16px;
        width: 50px;
        height: 50px;
    }
}

/* --------------------------------------------------------------------------
   GitHub Section
   -------------------------------------------------------------------------- */
.github {
    background: var(--color-bg-secondary);
}

.github-stats {
    display: flex;
    justify-content: center;
    gap: 60px;
    margin-bottom: 48px;
    flex-wrap: wrap;
}

.github-stat {
    text-align: center;
}

.github-stat-number {
    display: block;
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--color-accent);
    margin-bottom: 8px;
}

.github-stat-label {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
}

.github-repos-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

.github-repo-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 24px;
    transition: all var(--transition-medium);
}

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

.github-repo-card h4 {
    color: var(--color-accent);
    font-size: 1.1rem;
    margin-bottom: 8px;
    display: flex;
    align-items: center;
    gap: 8px;
}

.github-repo-card h4 svg {
    width: 18px;
    height: 18px;
}

.github-repo-card p {
    color: var(--color-text-secondary);
    font-size: 0.9rem;
    line-height: 1.6;
    margin-bottom: 16px;
}

.github-repo-meta {
    display: flex;
    gap: 16px;
    font-size: 0.85rem;
    color: var(--color-text-muted);
}

.github-repo-meta span {
    display: flex;
    align-items: center;
    gap: 4px;
}

.github-repo-lang {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: inline-block;
}

.github-cta {
    text-align: center;
}

.github-cta .btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
}

/* --------------------------------------------------------------------------
   Clients Section
   -------------------------------------------------------------------------- */
.clients {
    background: var(--color-bg-primary);
    padding: 80px 0;
}

.clients-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 24px;
    margin-top: 40px;
}

.client-logo {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 32px 24px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-medium);
    min-height: 100px;
}

.client-logo:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.2);
}

.client-logo span {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--color-text-secondary);
    text-align: center;
}

.client-logo:hover span {
    color: var(--color-text-primary);
}

@media (max-width: 1024px) {
    .clients-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

@media (max-width: 768px) {
    .clients-grid {
        grid-template-columns: repeat(2, 1fr);
        gap: 16px;
    }

    .client-logo {
        padding: 24px 16px;
        min-height: 80px;
    }

    .client-logo span {
        font-size: 0.9375rem;
    }
}

/* --------------------------------------------------------------------------
   Contact Form
   -------------------------------------------------------------------------- */
.contact-options {
    margin-top: 40px;
}

.contact-form-container {
    margin-top: 48px;
    max-width: 500px;
    margin-left: auto;
    margin-right: auto;
}

.contact-form-container h4 {
    font-size: 1.125rem;
    margin-bottom: 24px;
    color: var(--color-text-secondary);
}

.contact-form {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.form-group {
    width: 100%;
}

.form-group input,
.form-group textarea {
    width: 100%;
    padding: 14px 18px;
    background: var(--color-bg-tertiary);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    color: var(--color-text-primary);
    font-family: var(--font-family);
    font-size: 0.9375rem;
    transition: all var(--transition-fast);
}

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

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

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

.btn-submit {
    width: 100%;
    margin-top: 8px;
}

.btn-submit:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.form-status {
    margin-top: 16px;
    padding: 12px;
    border-radius: var(--radius-md);
    text-align: center;
    font-size: 0.9375rem;
}

.form-status:empty {
    display: none;
}

.form-status.success {
    background: rgba(34, 197, 94, 0.1);
    color: #22c55e;
    border: 1px solid rgba(34, 197, 94, 0.3);
}

.form-status.error {
    background: rgba(239, 68, 68, 0.1);
    color: #ef4444;
    border: 1px solid rgba(239, 68, 68, 0.3);
}

/* Calendly Button */
.btn-calendly {
    border-color: var(--color-accent);
    color: var(--color-accent);
}

.btn-calendly:hover {
    background: var(--color-accent);
    color: white;
}

@media (max-width: 768px) {
    .contact-form-container {
        margin-top: 32px;
    }

    .contact-buttons {
        flex-direction: column;
    }
}

/* --------------------------------------------------------------------------
   Theme Toggle Button
   -------------------------------------------------------------------------- */
.theme-toggle {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    border: 1px solid var(--color-border);
    background: var(--color-bg-tertiary);
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-fast);
    color: var(--color-text-secondary);
}

.theme-toggle:hover {
    border-color: var(--color-accent);
    color: var(--color-accent);
    transform: scale(1.05);
}

.theme-toggle svg {
    width: 20px;
    height: 20px;
}

/* Show sun icon in dark mode, moon icon in light mode */
.theme-toggle .sun-icon {
    display: block;
}

.theme-toggle .moon-icon {
    display: none;
}

[data-theme="light"] .theme-toggle .sun-icon {
    display: none;
}

[data-theme="light"] .theme-toggle .moon-icon {
    display: block;
}

/* --------------------------------------------------------------------------
   Light Theme Variables
   -------------------------------------------------------------------------- */
[data-theme="light"] {
    --color-bg-primary: #ffffff;
    --color-bg-secondary: #f8f9fa;
    --color-bg-tertiary: #e9ecef;
    --color-bg-card: #ffffff;

    --color-text-primary: #1a1a1d;
    --color-text-secondary: #495057;
    --color-text-muted: #6c757d;

    --color-border: #dee2e6;
    --color-border-light: #ced4da;

    --color-accent-light: rgba(59, 130, 246, 0.15);
}

/* Light theme specific adjustments */
[data-theme="light"] .navbar {
    background: rgba(255, 255, 255, 0.95);
    border-bottom-color: var(--color-border);
}

[data-theme="light"] .navbar.scrolled {
    background: rgba(255, 255, 255, 0.98);
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

[data-theme="light"] .hero {
    background:
        radial-gradient(ellipse at 20% 50%, rgba(59, 130, 246, 0.1) 0%, transparent 50%),
        radial-gradient(ellipse at 80% 20%, rgba(59, 130, 246, 0.08) 0%, transparent 40%),
        var(--color-bg-primary);
}

[data-theme="light"] .profile-placeholder {
    background: linear-gradient(135deg, var(--color-bg-tertiary) 0%, var(--color-bg-secondary) 100%);
}

[data-theme="light"] .nav-toggle span {
    background: var(--color-text-primary);
}

[data-theme="light"] .project-card:hover {
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.1);
}

[data-theme="light"] .timeline-marker {
    background: var(--color-bg-primary);
}

[data-theme="light"] .btn-primary {
    color: #ffffff;
}

[data-theme="light"] .btn-secondary:hover {
    background: var(--color-bg-tertiary);
}

[data-theme="light"] .theme-toggle {
    color: var(--color-text-primary);
    border-color: var(--color-border-light);
    background: var(--color-bg-secondary);
}

[data-theme="light"] .theme-toggle:hover {
    color: var(--color-accent);
    border-color: var(--color-accent);
}

[data-theme="light"] .nav-logo {
    color: var(--color-text-primary);
}

[data-theme="light"] .nav-link {
    color: var(--color-text-secondary);
}

[data-theme="light"] .nav-link:hover,
[data-theme="light"] .nav-link.active {
    color: var(--color-text-primary);
}

[data-theme="light"] .lang-btn {
    color: var(--color-text-primary);
}

[data-theme="light"] .lang-btn.active {
    background: var(--color-accent);
    color: white;
}

[data-theme="light"] .language-toggle {
    background: var(--color-bg-secondary);
    border-color: var(--color-border-light);
}

/* Smooth theme transition */
body,
.navbar,
.hero,
.section,
.project-card,
.timeline-content,
.work-card,
.skill-category,
.github-repo-card,
.client-logo,
.contact-cta,
.footer {
    transition: background-color var(--transition-medium),
                color var(--transition-medium),
                border-color var(--transition-medium);
}

@media (max-width: 768px) {
    .theme-toggle {
        width: 36px;
        height: 36px;
    }

    .theme-toggle svg {
        width: 18px;
        height: 18px;
    }
}

/* --------------------------------------------------------------------------
   Blog Section
   -------------------------------------------------------------------------- */
.blog {
    background: var(--color-bg-primary);
}

.blog-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
    gap: 24px;
    margin-bottom: 40px;
}

.blog-card {
    background: var(--color-bg-card);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-lg);
    padding: 28px;
    transition: all var(--transition-medium);
    display: flex;
    flex-direction: column;
    text-decoration: none;
    color: inherit;
}

.blog-card:hover {
    border-color: var(--color-accent);
    transform: translateY(-4px);
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.2);
}

.blog-card-header {
    display: flex;
    align-items: center;
    gap: 12px;
    margin-bottom: 16px;
}

.blog-card-icon {
    width: 44px;
    height: 44px;
    background: var(--color-accent-light);
    border-radius: var(--radius-md);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-accent);
    flex-shrink: 0;
}

.blog-card-icon svg {
    width: 22px;
    height: 22px;
}

.blog-card-meta {
    display: flex;
    flex-direction: column;
    gap: 2px;
}

.blog-card-date {
    font-size: 0.8125rem;
    color: var(--color-text-muted);
}

.blog-card-read-time {
    font-size: 0.75rem;
    color: var(--color-accent);
    font-weight: 500;
}

.blog-card h3 {
    font-size: 1.125rem;
    font-weight: 600;
    margin-bottom: 12px;
    line-height: 1.4;
    color: var(--color-text-primary);
}

.blog-card p {
    font-size: 0.9375rem;
    color: var(--color-text-secondary);
    line-height: 1.6;
    margin-bottom: 16px;
    flex-grow: 1;
}

.blog-card-tags {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
}

.blog-card-tags span {
    padding: 4px 10px;
    background: var(--color-bg-tertiary);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    color: var(--color-text-muted);
}

.blog-cta {
    text-align: center;
}

.blog-coming-soon {
    font-size: 1rem;
    color: var(--color-text-muted);
    font-style: italic;
}

.blog-empty {
    text-align: center;
    padding: 60px 20px;
    color: var(--color-text-muted);
}

.blog-empty svg {
    width: 48px;
    height: 48px;
    margin-bottom: 16px;
    opacity: 0.5;
}

.blog-empty p {
    font-size: 1rem;
}

@media (max-width: 768px) {
    .blog-grid {
        grid-template-columns: 1fr;
    }

    .blog-card {
        padding: 24px;
    }
}

/* --------------------------------------------------------------------------
   Work Model Selection
   -------------------------------------------------------------------------- */
.work-card {
    cursor: pointer;
    position: relative;
}

.work-card:hover {
    transform: translateY(-4px);
}

.work-select-indicator {
    position: absolute;
    top: 16px;
    right: 16px;
    width: 32px;
    height: 32px;
    border-radius: 50%;
    background: var(--color-bg-tertiary);
    border: 2px solid var(--color-border);
    display: flex;
    align-items: center;
    justify-content: center;
    opacity: 0;
    transform: scale(0.8);
    transition: all var(--transition-fast);
}

.work-select-indicator svg {
    color: white;
    opacity: 0;
}

.work-card:hover .work-select-indicator {
    opacity: 0.5;
}

.work-card.selected {
    border-color: var(--color-accent);
    box-shadow: 0 0 0 3px var(--color-accent-light);
}

.work-card.selected .work-select-indicator {
    opacity: 1;
    transform: scale(1);
    background: var(--color-accent);
    border-color: var(--color-accent);
}

.work-card.selected .work-select-indicator svg {
    opacity: 1;
}

.work-continue-wrapper {
    display: flex;
    justify-content: center;
    margin-top: 32px;
    margin-bottom: 24px;
}

.work-continue-btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 14px 32px;
    font-size: 1rem;
    animation: fadeInUp 0.3s ease;
}

.work-continue-btn svg {
    transition: transform var(--transition-fast);
}

.work-continue-btn:hover svg {
    transform: translateX(4px);
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Light mode adjustments */
[data-theme="light"] .work-card.selected {
    box-shadow: 0 0 0 3px var(--color-accent-light), 0 10px 30px rgba(0, 0, 0, 0.1);
}

@media (max-width: 768px) {
    .work-select-indicator {
        width: 28px;
        height: 28px;
        top: 12px;
        right: 12px;
    }

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