/* ==================== VARIABLES ==================== */
:root {
    /* Colors - Dark Mode First */
    --bg-primary: #0a0e17;
    --bg-secondary: #0f1419;
    --bg-tertiary: #1a1f2e;
    --text-primary: #e9ecef;
    --text-secondary: #adb5bd;
    --text-muted: #6c757d;
    --cyan: #0ea5e9;
    --cyan-light: #38bdf8;
    --cyan-dark: #0284c7;
    --purple: #8b5cf6;
    --border: rgba(255, 255, 255, 0.1);
    --status-green: #10b981;
    
    /* Gradients */
    --gradient-primary: linear-gradient(135deg, var(--cyan) 0%, var(--purple) 100%);
    --gradient-glow: radial-gradient(circle, rgba(14, 165, 233, 0.15) 0%, transparent 70%);
    
    /* Shadows */
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.3);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.4);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.5);
    --shadow-glow: 0 0 40px rgba(14, 165, 233, 0.3);
    
    /* Spacing */
    --section-padding: 120px;
    --container-max: 1280px;
    
    /* Transitions */
    --transition: 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Light Mode */
[data-theme="light"] {
    --bg-primary: #ffffff;
    --bg-secondary: #f8f9fa;
    --bg-tertiary: #e9ecef;
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --border: rgba(0, 0, 0, 0.1);
    --shadow-sm: 0 2px 8px rgba(0, 0, 0, 0.08);
    --shadow-md: 0 4px 16px rgba(0, 0, 0, 0.12);
    --shadow-lg: 0 8px 32px rgba(0, 0, 0, 0.15);
}

/* ==================== RESET ==================== */
*, *::before, *::after {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
    overflow-x: hidden;
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.6;
    overflow-x: hidden;
    transition: background 0.3s ease, color 0.3s ease;
}

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

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

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

a {
    text-decoration: none;
    color: inherit;
}

/* ==================== NAVBAR ==================== */
.navbar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    background: rgba(10, 14, 23, 0.8);
    backdrop-filter: blur(20px);
    border-bottom: 1px solid var(--border);
    transition: transform var(--transition), background var(--transition);
}

[data-theme="light"] .navbar {
    background: rgba(255, 255, 255, 0.8);
}

.navbar.scrolled {
    box-shadow: var(--shadow-md);
}

.navbar.hidden {
    transform: translateY(-100%);
}

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

.nav-logo img {
    height: 45px;
    width: auto;
    transition: transform var(--transition);
}

.nav-logo:hover img {
    transform: scale(1.05);
}

/* Logo color ajustado por tema */
[data-theme="light"] .nav-logo img {
    filter: brightness(0) saturate(100%);
    /* Convierte dorado → negro para mejor contraste */
}

[data-theme="dark"] .nav-logo img {
    filter: none;
    /* Mantiene color dorado original */
}

.nav-menu {
    display: flex;
    align-items: center;
    gap: 40px;
    list-style: none;
}

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

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

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -4px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--gradient-primary);
    transition: width var(--transition);
}

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

.nav-link-resume {
    padding: 8px 20px;
    border: 1px solid var(--cyan);
    border-radius: 6px;
    color: var(--cyan);
}

.nav-link-resume:hover {
    background: var(--cyan);
    color: white;
}

.theme-toggle {
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    width: 40px;
    height: 40px;
    border-radius: 8px;
    display: flex;
    align-items: center;
    justify-content: center;
    cursor: pointer;
    transition: all var(--transition);
    margin-left: 20px;
}

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

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

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

/* ==================== HERO ==================== */
.hero {
    min-height: 100vh;
    display: flex;
    align-items: center;
    padding-top: 70px;
    position: relative;
    overflow: hidden;
}

.hero::before {
    content: '';
    position: absolute;
    top: -200px;
    right: -200px;
    width: 600px;
    height: 600px;
    background: var(--gradient-glow);
    border-radius: 50%;
    pointer-events: none;
}

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

.hero-badge {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 8px 16px;
    background: rgba(14, 165, 233, 0.1);
    border: 1px solid rgba(14, 165, 233, 0.3);
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 1px;
    color: var(--cyan);
    margin-bottom: 24px;
}

.status-dot {
    width: 8px;
    height: 8px;
    background: var(--status-green);
    border-radius: 50%;
    animation: pulse 2s infinite;
}

@keyframes pulse {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.5; }
}

.hero-title {
    font-size: clamp(2.5rem, 6vw, 4rem);
    font-weight: 800;
    line-height: 1.1;
    margin-bottom: 24px;
    letter-spacing: -0.02em;
}

.gradient-text {
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.hero-description {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 32px;
    max-width: 540px;
    line-height: 1.7;
}

.hero-buttons {
    display: flex;
    gap: 16px;
    flex-wrap: wrap;
}

/* Profile Card */
.hero-card {
    position: relative;
}

.profile-card {
    position: relative;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 24px;
    padding: 32px;
    box-shadow: var(--shadow-lg);
    overflow: hidden;
}

.profile-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: var(--gradient-glow);
    animation: rotate 20s linear infinite;
    pointer-events: none;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.profile-img {
    position: relative;
    z-index: 1;
    width: 75%;
    height: auto;
    border-radius: 50%;
    margin: 0 auto 24px;
    box-shadow: var(--shadow-md);
    aspect-ratio: 1 / 1;
    object-fit: cover;
    display: block;
}

.profile-info {
    position: relative;
    z-index: 1;
    background: rgba(14, 165, 233, 0.1);
    border: 1px solid rgba(14, 165, 233, 0.3);
    border-radius: 12px;
    padding: 20px;
    text-align: center;
}

.stat-label {
    display: block;
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 1px;
    color: var(--text-muted);
    margin-bottom: 4px;
}

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--cyan);
}

.profile-glow {
    position: absolute;
    bottom: -100px;
    left: 50%;
    transform: translateX(-50%);
    width: 300px;
    height: 300px;
    background: var(--gradient-glow);
    border-radius: 50%;
    filter: blur(60px);
    pointer-events: none;
}

/* ==================== BUTTONS ==================== */
.btn {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 12px 28px;
    font-size: 0.95rem;
    font-weight: 600;
    border-radius: 8px;
    cursor: pointer;
    transition: all var(--transition);
    border: none;
    outline: none;
}

.btn-primary {
    background: var(--gradient-primary);
    color: white;
    box-shadow: 0 4px 12px rgba(14, 165, 233, 0.3);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(14, 165, 233, 0.4);
}

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

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

.btn-large {
    padding: 16px 36px;
    font-size: 1.05rem;
}

/* ==================== SECTIONS ==================== */
.section-label {
    display: block;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--cyan);
    letter-spacing: 2px;
    margin-bottom: 16px;
}

.section-title {
    font-size: clamp(2rem, 4vw, 3rem);
    font-weight: 800;
    line-height: 1.2;
    margin-bottom: 24px;
}

/* ==================== ABOUT ==================== */
.about {
    background: var(--bg-secondary);
}

.about-header {
    max-width: 600px;
    margin-bottom: 60px;
}

.about-grid {
    display: grid;
    grid-template-columns: 300px 1fr;
    gap: 60px;
    align-items: start;
}

.about-image {
    position: relative;
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.about-image img {
    width: 100%;
    border-radius: 50%;
    box-shadow: var(--shadow-lg);
    aspect-ratio: 1 / 1;
    object-fit: cover;
}

.about-status {
    position: absolute;
    bottom: 20px;
    left: 20px;
    display: flex;
    align-items: center;
    gap: 8px;
    padding: 10px 20px;
    background: rgba(10, 14, 23, 0.9);
    backdrop-filter: blur(10px);
    border: 1px solid var(--border);
    border-radius: 50px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--status-green);
}

.about-text {
    font-size: 1.05rem;
    color: var(--text-secondary);
    margin-bottom: 20px;
    line-height: 1.8;
}

.about-stats {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
}

.stat-item {
    position: absolute;
    pointer-events: auto;
    padding: 8px 12px;
    background: transparent;
    text-align: center;
    min-width: 90px;
    max-width: 100px;
}

.stat-item:nth-child(1) {
    top: 20px;
    right: -70px;
}

.stat-item:nth-child(2) {
    bottom: 20px;
    right: -70px;
}

.stat-item:nth-child(3) {
    top: 20px;
    left: -70px;
}

.stat-number {
    display: block;
    font-size: 1.8rem;
    font-weight: 900;
    background: var(--gradient-primary);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 4px;
    text-shadow: 0 2px 8px rgba(0, 114, 255, 0.3);
}

.stat-label {
    font-size: 0.7rem;
    color: var(--text-primary);
    font-weight: 600;
    display: block;
    text-shadow: 0 1px 4px rgba(0, 0, 0, 0.5);
    white-space: normal;
    line-height: 1.3;
}

/* ==================== WORK ==================== */
.work-header {
    text-align: center;
    max-width: 700px;
    margin: 0 auto 60px;
}

.work-tabs {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-bottom: 60px;
    flex-wrap: wrap;
}

.tab-btn {
    padding: 10px 24px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 50px;
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-secondary);
    cursor: pointer;
    transition: all var(--transition);
}

.tab-btn:hover {
    border-color: var(--cyan);
    color: var(--cyan);
}

.tab-btn.active {
    background: var(--gradient-primary);
    border-color: transparent;
    color: white;
}

.projects-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(350px, 1fr));
    gap: 32px;
}

.project-card {
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 16px;
    overflow: hidden;
    transition: all var(--transition);
}

.project-card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: var(--cyan);
}

.project-image {
    position: relative;
    aspect-ratio: 16 / 10;
    overflow: hidden;
    background: var(--bg-tertiary);
}

/* Diseño simple para las apps (sin mockups) */
.project-image-grid-simple {
    aspect-ratio: auto !important;
    background: var(--bg-tertiary);
    gap: 20px;
    padding: 30px 20px;
    min-height: 280px;
    display: flex !important;
    justify-content: center;
    align-items: center;
    position: relative;
}

.project-image-grid-simple img {
    width: auto !important;
    max-width: 45%;
    height: auto !important;
    max-height: 280px;
    object-fit: contain !important;
    border-radius: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.project-image-grid-simple .project-tags {
    position: absolute;
    top: 16px;
    right: 16px;
    z-index: 10;
}

/* MOCKUP PROFESIONAL DE NAVEGADOR + MÓVIL (proyectos cliente) */
.project-image-grid {
    position: relative;
    padding: 30px 20px 50px 20px;
    perspective: 1000px;
    background: var(--bg-tertiary);
}

/* Contenedor del mockup de navegador */
.browser-mockup {
    max-width: 100%;
    width: 100%;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 20px 60px rgba(0, 0, 0, 0.3);
    background: #2c3344;
    border: 1px solid rgba(255, 255, 255, 0.1);
}

/* Barra superior del navegador */
.browser-header {
    background: #3c4556;
    padding: 12px 16px;
    display: flex;
    align-items: center;
    gap: 12px;
    border-bottom: 1px solid rgba(0, 0, 0, 0.2);
}

/* Botones de navegador (rojo, amarillo, verde) */
.browser-buttons {
    display: flex;
    gap: 8px;
    flex-shrink: 0;
}

.browser-buttons div {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    transition: all 0.3s ease;
}

.browser-buttons div:nth-child(1) {
    background: #ff5f56;
}

.browser-buttons div:nth-child(2) {
    background: #ffbd2e;
}

.browser-buttons div:nth-child(3) {
    background: #27c93f;
}

/* Barra de dirección */
.browser-address {
    flex: 1;
    display: flex;
    align-items: center;
    gap: 8px;
    background: rgba(0, 0, 0, 0.3);
    border-radius: 6px;
    padding: 6px 12px;
    font-size: 0.813rem;
    min-width: 0;
}

.browser-address svg {
    width: 14px;
    height: 14px;
    flex-shrink: 0;
    color: #9ca3af;
}

.browser-address span {
    color: #9ca3af;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    flex: 1;
    min-width: 0;
}

/* Contenedor de screenshot desktop */
.browser-content {
    position: relative;
    width: 100%;
    aspect-ratio: 16 / 10;
    background: #000;
    overflow: hidden;
}

.browser-content img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    object-position: top;
    display: block;
}

.browser-content::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 0;
    right: 0;
    height: 60px;
    background: linear-gradient(to top, rgba(0,0,0,0.2) 0%, transparent 100%);
    pointer-events: none;
}

/* Mockup de iPhone pequeño (esquina inferior derecha) */
.phone-mockup-small {
    position: absolute;
    bottom: -16px;
    right: 8px;
    width: 80px;
    z-index: 20;
}

.phone-frame {
    position: relative;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.4);
}

.phone-screen {
    position: relative;
    overflow: hidden;
}

.phone-screen img {
    width: 100%;
    height: auto;
    display: block;
}

/* Tags de proyecto */
.project-image-grid .project-tags {
    position: absolute;
    top: 16px;
    right: 16px;
    z-index: 30;
}

.project-image img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    transition: transform 0.5s ease;
}

.project-card:hover .project-image img {
    transform: scale(1.05);
}

.project-tags {
    position: absolute;
    top: 16px;
    right: 16px;
    display: flex;
    gap: 8px;
}

.tag {
    padding: 6px 12px;
    background: rgba(10, 14, 23, 0.9);
    backdrop-filter: blur(10px);
    border: 1px solid rgba(14, 165, 233, 0.3);
    border-radius: 50px;
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--cyan);
}

.tag-wip {
    background: rgba(251, 191, 36, 0.2);
    border-color: rgba(251, 191, 36, 0.5);
    color: #fbbf24;
}

.project-content {
    padding: 24px;
}

.project-meta {
    margin-bottom: 8px;
}

.project-tech {
    font-size: 0.75rem;
    font-weight: 600;
    letter-spacing: 1px;
    color: var(--text-muted);
}

.project-title {
    font-size: 1.5rem;
    font-weight: 700;
    margin-bottom: 12px;
}

.project-desc {
    color: var(--text-secondary);
    margin-bottom: 16px;
    line-height: 1.6;
}

.project-stack {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
    margin-bottom: 20px;
}

.project-stack span {
    padding: 4px 12px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 50px;
    font-size: 0.8rem;
    color: var(--text-secondary);
}

.project-links {
    display: flex;
    gap: 12px;
}

.project-link {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 8px 16px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 6px;
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--cyan);
    transition: all var(--transition);
}

.project-link:hover {
    background: var(--cyan);
    border-color: var(--cyan);
    color: white;
}

.project-link.disabled {
    opacity: 0.5;
    cursor: not-allowed;
    color: var(--text-muted);
}

.project-link.disabled:hover {
    background: var(--bg-tertiary);
    color: var(--text-muted);
}

/* ==================== TECH ARSENAL ==================== */
.arsenal {
    background: var(--bg-secondary);
}

.arsenal-header {
    text-align: center;
    margin-bottom: 60px;
}

.tech-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
    gap: 24px;
    max-width: 800px;
    margin: 0 auto;
}

/* Carrusel solo en móvil */
@media (max-width: 768px) {
    .tech-grid.scrolling {
        display: flex;
        overflow: hidden;
        animation: scroll-carousel 30s linear infinite;
    }
}

@keyframes scroll-carousel {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(-50%);
    }
}

@keyframes scroll-tech {
    0% {
        transform: translateX(0);
    }
    100% {
        transform: translateX(calc(-100px * 8 - 16px * 8));
    }
}

@media (max-width: 768px) {
    .tech-grid {
        display: flex;
        overflow: hidden;
        gap: 16px;
        padding: 0 0 20px 0;
        position: relative;
        mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
        -webkit-mask-image: linear-gradient(to right, transparent, black 10%, black 90%, transparent);
    }
    
    .tech-grid::before {
        content: '';
        position: absolute;
        top: 0;
        left: 0;
        width: 100%;
        height: 100%;
        z-index: 1;
    }
    
    .tech-item {
        min-width: 100px;
        flex-shrink: 0;
        animation: scroll-tech 20s linear infinite;
    }
}

.tech-item {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 12px;
    padding: 24px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 12px;
    transition: all var(--transition);
}

.tech-item:hover {
    transform: translateY(-4px);
    border-color: var(--cyan);
    box-shadow: var(--shadow-md);
}

.tech-item img {
    width: 48px;
    height: 48px;
    filter: grayscale(0);
    transition: transform var(--transition);
}

.tech-item:hover img {
    transform: scale(1.1);
}

.tech-item span {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--text-secondary);
}

/* ==================== CONTACT ==================== */
.contact {
    min-height: 60vh;
    display: flex;
    align-items: center;
}

.contact-wrapper {
    text-align: center;
    max-width: 700px;
    margin: 0 auto;
}

.contact-title {
    font-size: clamp(2.5rem, 5vw, 4rem);
    font-weight: 800;
    margin-bottom: 24px;
}

.contact-subtitle {
    font-size: 1.125rem;
    color: var(--text-secondary);
    margin-bottom: 40px;
    line-height: 1.7;
}

.contact-buttons {
    display: flex;
    justify-content: center;
    gap: 16px;
    margin-bottom: 40px;
    flex-wrap: wrap;
}

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

.social-link {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 48px;
    height: 48px;
    background: var(--bg-tertiary);
    border: 1px solid var(--border);
    border-radius: 50%;
    color: var(--text-secondary);
    font-size: 1.25rem;
    transition: all var(--transition);
}

.social-link:hover {
    background: var(--cyan);
    border-color: var(--cyan);
    color: white;
    transform: translateY(-4px);
}

/* ==================== FOOTER ==================== */
.footer {
    background: var(--bg-secondary);
    border-top: 1px solid var(--border);
    padding: 60px 0 30px;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 60px;
    margin-bottom: 40px;
}

.footer-left p {
    color: var(--text-secondary);
    margin-top: 16px;
    max-width: 400px;
}

.footer-logo {
    height: 50px;
    width: auto;
    margin-bottom: 16px;
}

/* Logo color ajustado por tema */
[data-theme="light"] .footer-logo {
    filter: brightness(0) saturate(100%);
    /* Convierte dorado → negro para mejor contraste */
}

[data-theme="dark"] .footer-logo {
    filter: none;
    /* Mantiene color dorado original */
}

.footer-links {
    display: flex;
    gap: 60px;
}

.footer-col h4 {
    font-size: 0.875rem;
    font-weight: 700;
    letter-spacing: 1px;
    color: var(--text-muted);
    margin-bottom: 16px;
    text-transform: uppercase;
}

.footer-col a {
    display: block;
    color: var(--text-secondary);
    margin-bottom: 8px;
    transition: color var(--transition);
}

.footer-col a:hover {
    color: var(--cyan);
}

.footer-bottom {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-top: 30px;
    border-top: 1px solid var(--border);
    color: var(--text-muted);
    font-size: 0.875rem;
}

.footer-bottom i {
    color: #ef4444;
}

/* ==================== WHATSAPP FLOAT ==================== */
.whatsapp-float {
    position: fixed;
    bottom: 30px;
    right: 30px;
    width: 60px;
    height: 60px;
    background: #25d366;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: white;
    font-size: 1.75rem;
    box-shadow: 0 4px 12px rgba(37, 211, 102, 0.4);
    transition: all var(--transition);
    z-index: 999;
}

.whatsapp-float:hover {
    transform: scale(1.1) translateY(-4px);
    box-shadow: 0 6px 20px rgba(37, 211, 102, 0.6);
}

/* ==================== RESPONSIVE ==================== */
@media (max-width: 968px) {
    :root {
        --section-padding: 80px;
    }
    
    .hero-content {
        grid-template-columns: 1fr;
        gap: 40px;
        text-align: center;
    }
    
    .hero-text {
        order: 2;
    }
    
    .hero-card {
        order: 1;
        max-width: 400px;
        margin: 0 auto;
    }
    
    .hero-description {
        margin-left: auto;
        margin-right: auto;
    }
    
    .hero-buttons {
        justify-content: center;
    }
    
    .about-grid {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .about-image {
        max-width: 250px;
        margin: 0 auto;
        position: relative;
    }
    
    .about-stats {
        position: absolute;
        width: 100%;
        height: 100%;
    }
    
    .stat-item {
        padding: 6px 10px;
        min-width: 80px;
        max-width: 90px;
    }
    
    .stat-item:nth-child(1) {
        top: 15px;
        right: -60px;
    }
    
    .stat-item:nth-child(2) {
        top: 50%;
        transform: translateY(-50%);
        right: -70px;
    }
    
    .stat-item:nth-child(3) {
        top: 15px;
        left: -60px;
    }
    
    .stat-number {
        font-size: 1.5rem;
    }
    
    .stat-label {
        font-size: 0.65rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        gap: 40px;
    }
    
    .footer-bottom {
        flex-direction: column;
        gap: 12px;
        text-align: center;
    }
}

@media (max-width: 768px) {
    .nav-menu {
        position: fixed;
        top: 70px;
        left: 0;
        right: 0;
        flex-direction: column;
        background: var(--bg-primary);
        border-bottom: 1px solid var(--border);
        padding: 24px;
        transform: translateY(-100%);
        opacity: 0;
        visibility: hidden;
        transition: all var(--transition);
    }
    
    .nav-menu.active {
        transform: translateY(0);
        opacity: 1;
        visibility: visible;
    }
    
    .mobile-toggle {
        display: flex;
    }
    
    .projects-grid {
        grid-template-columns: 1fr;
    }
    
    .project-image-grid {
        padding: 20px 15px 40px 15px;
    }
    
    .browser-mockup {
        border-radius: 8px;
    }
    
    .browser-header {
        padding: 10px 12px;
        gap: 10px;
    }
    
    .browser-buttons div {
        width: 10px;
        height: 10px;
    }
    
    .browser-address {
        padding: 5px 10px;
        font-size: 0.75rem;
    }
    
    .browser-address svg {
        width: 12px;
        height: 12px;
    }
    
    .project-image-grid-simple {
        gap: 15px;
        padding: 20px 10px;
        min-height: 250px;
    }
    
    .project-image-grid-simple img {
        max-width: 48%;
        max-height: 250px;
    }
    
    .phone-mockup-small {
        width: 60px;
        right: 4px;
        bottom: -12px;
    }
    
    .about-stats {
        grid-template-columns: 1fr;
    }
    
    .whatsapp-float {
        width: 50px;
        height: 50px;
        font-size: 1.5rem;
        bottom: 20px;
        right: 20px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 16px;
    }
    
    :root {
        --section-padding: 60px;
    }
    
    .project-image-grid {
        padding: 15px 10px 35px 10px;
    }
    
    .browser-mockup {
        border-radius: 6px;
    }
    
    .browser-header {
        padding: 8px 10px;
        gap: 8px;
    }
    
    .browser-buttons {
        gap: 5px;
    }
    
    .browser-buttons div {
        width: 8px;
        height: 8px;
    }
    
    .browser-address {
        padding: 4px 8px;
        font-size: 0.7rem;
        gap: 6px;
    }
    
    .browser-address svg {
        width: 10px;
        height: 10px;
    }
    
    .phone-mockup-small {
        width: 50px;
        right: 3px;
        bottom: -10px;
    }
    
    .project-image-grid-simple {
        padding: 15px 10px;
        gap: 10px;
    }
    
    .project-image-grid-simple img {
        max-width: 48%;
        max-height: 200px;
    }
    
    .hero-buttons {
        flex-direction: column;
        width: 100%;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .contact-buttons {
        flex-direction: column;
    }
    
    .work-tabs {
        gap: 8px;
    }
    
    .tab-btn {
        padding: 8px 16px;
        font-size: 0.85rem;
    }
}