/* Variables CSS */
:root {
    --primary-color: #667eea;
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-color: #f093fb;
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --accent-color: #4ecdc4;
    --text-primary: #2d3748;
    --text-secondary: #718096;
    --text-light: #a0aec0;
    --bg-primary: #ffffff;
    --bg-secondary: #f7fafc;
    --bg-dark: #2d3748;
    --border-color: #e2e8f0;
    --shadow-sm: 0 1px 3px 0 rgba(0, 0, 0, 0.1), 0 1px 2px 0 rgba(0, 0, 0, 0.06);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1), 0 4px 6px -2px rgba(0, 0, 0, 0.05);
    --shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, 0.1), 0 10px 10px -5px rgba(0, 0, 0, 0.04);
    --border-radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    
    /* Responsive variables */
    --container-padding: 20px;
    --section-padding: 100px;
    --grid-gap: 2rem;
    --card-padding: 2rem;
}

/* Responsive CSS Variables */
@media (max-width: 768px) {
    :root {
        --container-padding: 15px;
        --section-padding: 80px;
        --grid-gap: 1.5rem;
        --card-padding: 1.5rem;
    }
}

@media (max-width: 480px) {
    :root {
        --container-padding: 12px;
        --section-padding: 60px;
        --grid-gap: 1rem;
        --card-padding: 1.2rem;
    }
}

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

html {
    scroll-behavior: smooth;
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--container-padding);
}

/* Header */
.header {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    border-bottom: 1px solid var(--border-color);
    z-index: 1000;
    transition: var(--transition);
}

.header-content {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 1rem 0;
    min-height: 60px;
}

.logo {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary-color);
    text-decoration: none;
}

.logo i {
    font-size: 2rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

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

.nav-link {
    text-decoration: none;
    color: var(--text-primary);
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

.nav-link::after {
    content: '';
    position: absolute;
    bottom: -5px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary-gradient);
    transition: var(--transition);
}

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

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

.menu-toggle {
    display: none;
    flex-direction: column;
    gap: 4px;
    background: none;
    border: none;
    cursor: pointer;
    padding: 8px;
}

.menu-toggle span {
    width: 25px;
    height: 3px;
    background: var(--text-primary);
    transition: var(--transition);
}

/* Hero Section */
.hero {
    margin-top: 80px;
    padding: var(--section-padding) 0;
    background: linear-gradient(135deg, #f8faff 0%, #f0f4ff 100%);
    position: relative;
    overflow: hidden;
    min-height: 60vh;
}

.hero::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: url('data:image/svg+xml,<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 100 100"><defs><pattern id="grid" width="10" height="10" patternUnits="userSpaceOnUse"><path d="M 10 0 L 0 0 0 10" fill="none" stroke="%23e2e8f0" stroke-width="0.5"/></pattern></defs><rect width="100" height="100" fill="url(%23grid)"/></svg>');
    opacity: 0.3;
}

.hero .container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
    position: relative;
    z-index: 1;
}

.hero-title {
    font-size: clamp(2rem, 6vw, 3.5rem);
    font-weight: 700;
    line-height: 1.2;
    margin-bottom: 1.5rem;
}

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

.hero-description {
    font-size: clamp(1rem, 2.5vw, 1.2rem);
    color: var(--text-secondary);
    margin-bottom: 2rem;
    line-height: 1.7;
}

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

.btn {
    display: inline-flex;
    align-items: center;
    gap: 0.5rem;
    padding: 1rem 2rem;
    border-radius: var(--border-radius);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    cursor: pointer;
    border: none;
    font-size: 1rem;
}

.btn-primary {
    background: var(--primary-gradient);
    color: white;
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn-secondary {
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

.btn-secondary:hover {
    background: var(--primary-color);
    color: white;
    transform: translateY(-2px);
}

/* Floating Cards */
.floating-cards {
    position: relative;
    height: 400px;
}

.floating-card {
    position: absolute;
    background: white;
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    text-align: center;
    min-width: 200px;
    animation: float 3s ease-in-out infinite;
}

.floating-card:nth-child(1) {
    top: 50px;
    right: 50px;
    animation-delay: 0s;
}

.floating-card:nth-child(2) {
    top: 200px;
    right: 200px;
    animation-delay: 1s;
}

.floating-card:nth-child(3) {
    top: 100px;
    right: 0;
    animation-delay: 2s;
}

.floating-card i {
    font-size: 2rem;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-20px); }
}

/* Tools Section */
.tools-section {
    padding: var(--section-padding) 0;
    background: var(--bg-secondary);
}

.section-header {
    text-align: center;
    margin-bottom: 4rem;
}

.section-title {
    font-size: clamp(2rem, 5vw, 3rem);
    font-weight: 700;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.section-subtitle {
    font-size: clamp(1rem, 2.5vw, 1.2rem);
    color: var(--text-secondary);
    max-width: 600px;
    margin: 0 auto;
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--grid-gap);
}

.tool-card {
    background: white;
    padding: var(--card-padding);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
    cursor: pointer;
    text-align: center;
    border: 1px solid var(--border-color);
}

.tool-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-xl);
    border-color: var(--primary-color);
}

.tool-icon {
    width: 80px;
    height: 80px;
    margin: 0 auto 1.5rem;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 50%;
    background: var(--primary-gradient);
    color: white;
    font-size: 2rem;
}

.tool-title {
    font-size: 1.5rem;
    font-weight: 600;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.tool-description {
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    line-height: 1.6;
}

.tool-btn {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    width: 100%;
}

.tool-btn:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(5px);
    z-index: 2000;
    animation: fadeIn 0.3s ease-out;
}

.modal.active {
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-content {
    background: white;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-xl);
    max-width: 800px;
    width: 90%;
    max-height: 90vh;
    overflow-y: auto;
    animation: slideIn 0.3s ease-out;
}

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 1.5rem 2rem;
    border-bottom: 1px solid var(--border-color);
}

.modal-header h3 {
    font-size: 1.5rem;
    font-weight: 600;
    color: var(--text-primary);
}

.modal-close {
    background: none;
    border: none;
    font-size: 1.5rem;
    cursor: pointer;
    color: var(--text-secondary);
    transition: var(--transition);
    padding: 0.5rem;
    border-radius: 50%;
}

.modal-close:hover {
    background: var(--bg-secondary);
    color: var(--text-primary);
}

.modal-body {
    padding: 2rem;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

@keyframes slideIn {
    from { transform: translateY(-50px); opacity: 0; }
    to { transform: translateY(0); opacity: 1; }
}

/* About Section */
.about-section {
    padding: 100px 0;
    background: white;
}

.about-content {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 4rem;
    align-items: center;
}

.features-list {
    margin-top: 2rem;
}

.feature-item {
    display: flex;
    align-items: center;
    gap: 1rem;
    margin-bottom: 1rem;
}

.feature-item i {
    color: var(--accent-color);
    font-size: 1.2rem;
}

.about-stats {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 2rem;
}

.stat-item {
    text-align: center;
    padding: 2rem;
    background: var(--bg-secondary);
    border-radius: var(--border-radius);
}

.stat-number {
    font-size: 3rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    margin-bottom: 0.5rem;
}

.stat-label {
    color: var(--text-secondary);
    font-weight: 500;
}

/* Footer */
.footer {
    background: var(--bg-dark);
    color: white;
    padding: 3rem 0 1rem;
}

.footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr 1fr;
    gap: 3rem;
    margin-bottom: 2rem;
}

.footer-brand .logo {
    color: white;
    margin-bottom: 1rem;
}

.footer-brand p {
    color: var(--text-light);
    line-height: 1.6;
}

.footer-links h4,
.footer-contact h4,
.footer-creator h4 {
    margin-bottom: 1rem;
    color: white;
}

.footer-links a {
    display: block;
    color: var(--text-light);
    text-decoration: none;
    margin-bottom: 0.5rem;
    transition: var(--transition);
}

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

.footer-contact p,
.footer-creator p {
    color: var(--text-light);
    margin-bottom: 0.5rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

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

.creator-brand {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 1.5rem;
    margin-bottom: 1rem;
    text-decoration: none;
    color: inherit;
    transition: var(--transition);
    cursor: pointer;
}

.creator-brand:hover {
    transform: translateY(-2px);
}

.creator-logo {
    width: 120px;
    height: 120px;
    filter: brightness(0) invert(1); /* Convierte el logo a blanco */
    transition: var(--transition);
}

.creator-brand:hover .creator-logo {
    filter: brightness(0) invert(1) drop-shadow(0 0 12px rgba(255, 255, 255, 0.5));
    transform: scale(1.05);
}

.creator-brand span {
    color: white;
    font-weight: 600;
    font-size: 1.2rem;
    transition: var(--transition);
}

.creator-brand:hover span {
    color: var(--primary-color);
    text-shadow: 0 0 8px rgba(102, 126, 234, 0.3);
}

.nova-link {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
}

.nova-link:hover {
    color: white;
    text-shadow: 0 0 8px rgba(102, 126, 234, 0.5);
}

.footer-bottom {
    text-align: center;
    padding-top: 2rem;
    border-top: 1px solid #4a5568;
    color: var(--text-light);
}

/* Responsive Design */
@media (max-width: 1200px) {
    .container {
        max-width: 100%;
        padding: 0 30px;
    }
    
    .tools-grid {
        grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
        gap: 1.5rem;
    }
    
    .floating-card {
        min-width: 180px;
        padding: 1.2rem;
    }
    
    .hero .container {
        gap: 3rem;
    }
}

@media (max-width: 992px) {
    .container {
        padding: 0 25px;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 3rem;
    }
    
    .hero-title {
        font-size: 3rem;
    }
    
    .section-title {
        font-size: 2.5rem;
    }
    
    .floating-cards {
        margin-top: 2rem;
        height: 300px;
    }
    
    .floating-card:nth-child(1) {
        top: 20px;
        right: 20px;
    }
    
    .floating-card:nth-child(2) {
        top: 120px;
        right: 150px;
    }
    
    .floating-card:nth-child(3) {
        top: 50px;
        right: 0;
    }
    
    .about-content {
        grid-template-columns: 1fr;
        gap: 3rem;
    }
    
    .about-stats {
        grid-template-columns: repeat(3, 1fr);
        gap: 1.5rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr 1fr;
        gap: 2rem;
    }
    
    .footer-creator {
        grid-column: 1 / -1;
        margin-top: 1rem;
    }
    
    /* Modal responsive */
    .modal-content {
        width: 95%;
        max-width: 700px;
    }
    
    .modal-header {
        padding: 1.2rem 1.5rem;
    }
    
    .modal-body {
        padding: 1.5rem;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 20px;
    }
    
    .menu-toggle {
        display: flex;
    }

    .nav {
        display: none;
    }
    
    .header-content {
        padding: 0.8rem 0;
    }
    
    .logo {
        font-size: 1.3rem;
    }
    
    .logo i {
        font-size: 1.6rem;
    }

    .hero {
        padding: 60px 0;
        margin-top: 70px;
    }
    
    .hero .container {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }

    .hero-title {
        font-size: 2.5rem;
        line-height: 1.3;
    }
    
    .hero-description {
        font-size: 1.1rem;
        margin-bottom: 1.5rem;
    }

    .floating-cards {
        display: none;
    }
    
    .section-title {
        font-size: 2.2rem;
    }
    
    .section-subtitle {
        font-size: 1.1rem;
    }
    
    .tools-section {
        padding: 80px 0;
    }
    
    .about-section {
        padding: 80px 0;
    }

    .about-content {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    .about-stats {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .stat-item {
        padding: 1.5rem;
    }
    
    .stat-number {
        font-size: 2.5rem;
    }

    .footer {
        padding: 2.5rem 0 1rem;
    }
    
    .footer-content {
        grid-template-columns: 1fr;
        text-align: center;
        gap: 2rem;
    }
    
    .creator-brand {
        flex-direction: column;
        gap: 1rem;
    }
    
    .creator-logo {
        width: 80px;
        height: 80px;
    }

    .tools-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .tool-card {
        padding: 1.5rem;
    }
    
    .tool-icon {
        width: 70px;
        height: 70px;
        font-size: 1.8rem;
        margin-bottom: 1.2rem;
    }

    .hero-buttons {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }

    .btn {
        width: 100%;
        max-width: 280px;
        justify-content: center;
        padding: 1rem 1.5rem;
    }
    
    /* Modal responsive */
    .modal-content {
        width: 95%;
        max-height: 85vh;
    }
    
    .modal-header {
        padding: 1rem 1.2rem;
    }
    
    .modal-header h3 {
        font-size: 1.3rem;
    }
    
    .modal-body {
        padding: 1.2rem;
    }
    
    /* Form responsive */
    .form-row {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .button-group {
        flex-direction: column;
        gap: 0.8rem;
    }
    
    .btn-generate,
    .btn-clear {
        width: 100%;
        padding: 0.8rem 1.5rem;
    }
    
    /* Timer responsive */
    .timer-tabs {
        flex-wrap: wrap;
        justify-content: center;
    }
    
    .timer-tab {
        padding: 0.6rem 1.2rem;
        font-size: 0.9rem;
    }
    
    .time-display {
        font-size: 2.2rem;
    }
    
    .milliseconds {
        font-size: 1.2rem;
    }
    
    .timer-controls {
        flex-wrap: wrap;
        gap: 0.8rem;
    }
    
    .timer-inputs {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }
    
    .timer-input-group {
        display: flex;
        flex-direction: row;
        align-items: center;
        gap: 0.8rem;
    }
    
    .timer-input-group input {
        width: 80px;
        font-size: 1.1rem;
    }
    
    /* Color palette responsive */
    .color-controls {
        flex-direction: column;
        gap: 1rem;
    }
    
    .color-input-group {
        flex-direction: row;
        align-items: center;
        gap: 1rem;
    }
    
    .palette-display {
        grid-template-columns: repeat(auto-fit, minmax(120px, 1fr));
        gap: 0.8rem;
    }
    
    .color-item {
        height: 100px;
    }
    
    .color-info {
        font-size: 0.8rem;
    }
    
    .palette-actions {
        flex-direction: column;
        gap: 0.8rem;
    }
    
    /* Email validation responsive */
    .validation-options {
        flex-direction: column;
        gap: 1rem;
    }
    
    .email-overall-result {
        font-size: 1.1rem;
        padding: 0.8rem;
    }
    
    .email-result-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
        padding: 0.8rem;
    }
    
    /* Age calculator responsive */
    .age-detailed-stats {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .age-stat-group {
        padding: 1.2rem;
    }
    
    .age-main-result {
        padding: 1.2rem;
    }
    
    .age-main-result h3 {
        font-size: 1.3rem;
    }
    
    /* Lap times responsive */
    .lap-item {
        flex-direction: column;
        gap: 0.25rem;
        text-align: center;
        padding: 0.8rem;
    }
}

@media (max-width: 480px) {
    .container {
        padding: 0 15px;
    }
    
    .header-content {
        padding: 0.6rem 0;
    }
    
    .logo {
        font-size: 1.2rem;
    }
    
    .logo i {
        font-size: 1.4rem;
    }

    .hero {
        padding: 40px 0;
        margin-top: 65px;
    }
    
    .hero-title {
        font-size: 2rem;
        line-height: 1.4;
    }
    
    .hero-description {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.8rem;
    }
    
    .section-subtitle {
        font-size: 1rem;
    }

    .tools-section,
    .about-section {
        padding: 60px 0;
    }
    
    .section-header {
        margin-bottom: 3rem;
    }
    
    .tool-card {
        padding: 1.2rem;
    }
    
    .tool-icon {
        width: 60px;
        height: 60px;
        font-size: 1.5rem;
        margin-bottom: 1rem;
    }
    
    .tool-title {
        font-size: 1.3rem;
    }
    
    .tool-description {
        font-size: 0.95rem;
        line-height: 1.5;
    }

    .modal-content {
        width: 98%;
        max-height: 90vh;
        border-radius: 8px;
    }
    
    .modal-header {
        padding: 0.8rem 1rem;
    }
    
    .modal-header h3 {
        font-size: 1.2rem;
    }

    .modal-body {
        padding: 1rem;
    }
    
    .form-control {
        padding: 0.6rem;
        font-size: 0.95rem;
    }
    
    .btn {
        padding: 0.8rem 1.2rem;
        font-size: 0.95rem;
    }
    
    .result-box {
        padding: 1.2rem;
        margin-top: 1.2rem;
    }
    
    .result-text {
        font-size: 1.1rem;
    }
    
    /* Timer ultra responsive */
    .time-display {
        font-size: 1.8rem;
    }
    
    .milliseconds {
        font-size: 1rem;
    }
    
    .timer-controls {
        gap: 0.6rem;
    }
    
    .timer-controls .btn {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }
    
    .timer-input-group input {
        width: 70px;
        font-size: 1rem;
        padding: 0.4rem;
    }
    
    .timer-finished {
        padding: 0.8rem;
        font-size: 1.1rem;
    }
    
    /* Color palette ultra responsive */
    .palette-display {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.6rem;
    }
    
    .color-item {
        height: 80px;
    }
    
    .color-info {
        padding: 0.3rem;
        font-size: 0.7rem;
    }
    
    .copy-color-btn {
        padding: 0.15rem;
    }
    
    /* Age calculator ultra responsive */
    .age-stat-group {
        padding: 1rem;
    }
    
    .age-stat-group h4 {
        font-size: 1.1rem;
    }
    
    .age-stat-item {
        font-size: 0.9rem;
        padding: 0.4rem 0;
    }
    
    .age-main-result {
        padding: 1rem;
    }
    
    .age-main-result h3 {
        font-size: 1.2rem;
        line-height: 1.4;
    }
    
    /* Footer ultra responsive */
    .footer {
        padding: 2rem 0 1rem;
    }
    
    .creator-logo {
        width: 60px;
        height: 60px;
    }
    
    .creator-brand span {
        font-size: 1rem;
    }
    
    .footer-bottom {
        font-size: 0.9rem;
        padding-top: 1.5rem;
    }
}

@media (max-width: 360px) {
    .container {
        padding: 0 12px;
    }
    
    .hero-title {
        font-size: 1.8rem;
    }
    
    .section-title {
        font-size: 1.6rem;
    }
    
    .time-display {
        font-size: 1.5rem;
    }
    
    .timer-input-group input {
        width: 60px;
        font-size: 0.9rem;
    }
    
    .color-item {
        height: 70px;
    }
    
    .modal-content {
        width: 100%;
        border-radius: 0;
        max-height: 100vh;
    }
    
    .palette-display {
        grid-template-columns: 1fr 1fr;
    }
}

/* Tool-specific styles */
.tool-content {
    max-width: 600px;
    margin: 0 auto;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
    color: var(--text-primary);
}

.form-control {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    font-size: 1rem;
    transition: var(--transition);
}

.form-control:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(102, 126, 234, 0.1);
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
}

.result-box {
    background: var(--bg-secondary);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    margin-top: 1.5rem;
    border-left: 4px solid var(--primary-color);
}

.result-text {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.copy-btn {
    background: var(--accent-color);
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 6px;
    cursor: pointer;
    font-size: 0.9rem;
    transition: var(--transition);
}

.copy-btn:hover {
    background: #45b7ab;
}

.checkbox-group {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-top: 1rem;
}

.checkbox-item {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.checkbox-item input[type="checkbox"] {
    width: 18px;
    height: 18px;
    accent-color: var(--primary-color);
}

.range-group {
    display: flex;
    align-items: center;
    gap: 1rem;
}

.range-input {
    flex: 1;
}

.range-value {
    min-width: 50px;
    text-align: center;
    font-weight: 600;
    color: var(--primary-color);
}

select.form-control {
    cursor: pointer;
}

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

.button-group {
    display: flex;
    gap: 1rem;
    justify-content: center;
    margin-top: 1.5rem;
}

.btn-generate {
    background: var(--primary-gradient);
    color: white;
    border: none;
    padding: 0.75rem 2rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
}

.btn-generate:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-clear {
    background: var(--text-light);
    color: white;
    border: none;
    padding: 0.75rem 2rem;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    font-size: 1rem;
}

.btn-clear:hover {
    background: var(--text-secondary);
}

/* Loading animation */
.loading {
    display: inline-block;
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 1s ease-in-out infinite;
}

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

/* Success message */
.success-message {
    background: #48bb78;
    color: white;
    padding: 0.75rem 1rem;
    border-radius: var(--border-radius);
    margin-top: 1rem;
    display: none;
}

.success-message.show {
    display: block;
    animation: slideDown 0.3s ease-out;
}

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

/* === ESTILOS PARA NUEVAS HERRAMIENTAS === */

/* Timer y Cronómetro */
.timer-tabs {
    display: flex;
    border-bottom: 2px solid #e9ecef;
    margin-bottom: 1.5rem;
}

.timer-tab {
    padding: 0.75rem 1.5rem;
    border: none;
    background: none;
    font-weight: 600;
    color: #6c757d;
    cursor: pointer;
    border-bottom: 3px solid transparent;
    transition: all 0.3s ease;
}

.timer-tab.active {
    color: var(--primary-color);
    border-bottom-color: var(--primary-color);
}

.timer-content {
    display: none;
}

.timer-content.active {
    display: block;
}

.timer-display {
    text-align: center;
    margin: 2rem 0;
}

.time-display {
    font-size: 3rem;
    font-weight: bold;
    color: var(--primary-color);
    font-family: 'Courier New', monospace;
}

.milliseconds {
    font-size: 1.5rem;
    color: #6c757d;
}

.timer-controls {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin: 1.5rem 0;
}

.timer-inputs {
    display: flex;
    justify-content: center;
    gap: 1rem;
    margin: 1.5rem 0;
}

.timer-input-group {
    text-align: center;
}

.timer-input-group label {
    display: block;
    font-size: 0.8rem;
    color: #6c757d;
    margin-bottom: 0.5rem;
}

.timer-input-group input {
    width: 60px;
    text-align: center;
    font-size: 1.2rem;
    padding: 0.5rem;
    border: 2px solid #dee2e6;
    border-radius: 5px;
}

.lap-times {
    max-height: 300px;
    overflow-y: auto;
    margin-top: 1.5rem;
}

.lap-item {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem;
    border-bottom: 1px solid #e9ecef;
    font-family: 'Courier New', monospace;
}

.timer-finished {
    background: linear-gradient(135deg, #ff6b6b, #ee5a52);
    color: white;
    padding: 1rem;
    border-radius: 10px;
    text-align: center;
    font-size: 1.2rem;
    font-weight: bold;
    margin: 1rem 0;
}

/* Generador de Paletas de Colores */
.color-controls {
    display: flex;
    gap: 1rem;
    margin-bottom: 1.5rem;
    flex-wrap: wrap;
}

.color-input-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.color-input-group label {
    font-weight: 600;
    color: #495057;
}

#base-color {
    width: 60px;
    height: 40px;
    border: none;
    border-radius: 5px;
    cursor: pointer;
}

#palette-type, #color-count {
    padding: 0.5rem;
    border: 2px solid #dee2e6;
    border-radius: 5px;
    background: white;
}

.palette-display {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
    margin: 1.5rem 0;
}

.color-item {
    height: 120px;
    border-radius: 10px;
    display: flex;
    align-items: flex-end;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    transition: transform 0.3s ease;
}

.color-item:hover {
    transform: translateY(-2px);
}

.color-info {
    background: rgba(0, 0, 0, 0.8);
    color: white;
    padding: 0.5rem;
    width: 100%;
    border-radius: 0 0 10px 10px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.color-hex {
    font-family: 'Courier New', monospace;
    font-weight: bold;
}

.copy-color-btn {
    background: none;
    border: none;
    color: white;
    cursor: pointer;
    padding: 0.25rem;
    border-radius: 3px;
    transition: background 0.3s ease;
}

.copy-color-btn:hover {
    background: rgba(255, 255, 255, 0.2);
}

.palette-actions {
    display: none;
    gap: 1rem;
    justify-content: center;
    margin-top: 1.5rem;
}

/* Validador de Email */
.email-input-group {
    margin-bottom: 1.5rem;
}

.email-input-group input {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #dee2e6;
    border-radius: 5px;
    font-size: 1rem;
}

.validation-options {
    display: flex;
    gap: 1.5rem;
    margin: 1rem 0;
    flex-wrap: wrap;
}

.validation-option {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.validation-option input[type="checkbox"] {
    width: 18px;
    height: 18px;
}

.email-results {
    margin-top: 1.5rem;
    padding: 1rem;
    border-radius: 10px;
    background: #f8f9fa;
}

.email-overall-result {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    font-size: 1.2rem;
    font-weight: bold;
    margin-bottom: 1rem;
    padding: 1rem;
    border-radius: 8px;
}

.email-overall-result.success {
    background: #d4edda;
    color: #155724;
}

.email-overall-result.error {
    background: #f8d7da;
    color: #721c24;
}

.email-detailed-results {
    display: flex;
    flex-direction: column;
    gap: 0.75rem;
}

.email-result-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.75rem;
    border-radius: 5px;
    background: white;
    border-left: 4px solid;
}

.email-result-item.success {
    border-left-color: #28a745;
}

.email-result-item.warning {
    border-left-color: #ffc107;
}

.email-result-item.error {
    border-left-color: #dc3545;
}

.test-name {
    font-weight: 600;
}

.test-result {
    color: #6c757d;
}

/* Calculadora de Edad */
.age-input-group {
    margin-bottom: 1.5rem;
}

.age-input-group input {
    width: 100%;
    padding: 0.75rem;
    border: 2px solid #dee2e6;
    border-radius: 5px;
    font-size: 1rem;
}

.age-results {
    margin-top: 1.5rem;
}

.age-main-result {
    text-align: center;
    margin-bottom: 2rem;
    padding: 1.5rem;
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
    border-radius: 15px;
}

.age-main-result h3 {
    margin: 0;
    font-size: 1.5rem;
}

.age-detailed-stats {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2rem;
}

.age-stat-group {
    background: #f8f9fa;
    padding: 1.5rem;
    border-radius: 10px;
}

.age-stat-group h4 {
    margin: 0 0 1rem 0;
    color: var(--primary-color);
    font-size: 1.2rem;
    border-bottom: 2px solid var(--primary-color);
    padding-bottom: 0.5rem;
}

.age-stat-item {
    display: flex;
    justify-content: space-between;
    padding: 0.5rem 0;
    border-bottom: 1px solid #dee2e6;
}

.age-stat-item:last-child {
    border-bottom: none;
}

.stat-label {
    font-weight: 600;
    color: #495057;
}

.stat-value {
    font-weight: bold;
    color: var(--primary-color);
}

.highlight {
    color: var(--accent-color);
    font-weight: bold;
}

/* Responsive para nuevas herramientas */
@media (max-width: 1200px) {
    .timer-display {
        margin: 1.5rem 0;
    }
    
    .palette-display {
        grid-template-columns: repeat(auto-fit, minmax(140px, 1fr));
    }
    
    .age-detailed-stats {
        gap: 1.5rem;
    }
}

@media (max-width: 992px) {
    .timer-inputs {
        gap: 0.8rem;
    }
    
    .color-controls {
        gap: 0.8rem;
    }
    
    .validation-options {
        gap: 1.2rem;
    }
    
    .age-detailed-stats {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    
    .time-display {
        font-size: 2.5rem;
    }
    
    .timer-controls {
        gap: 0.8rem;
    }
}

@media (max-width: 768px) {
    .timer-tabs {
        margin-bottom: 1.2rem;
    }
    
    .timer-tab {
        padding: 0.6rem 1rem;
        font-size: 0.9rem;
    }
    
    .timer-inputs {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
    }
    
    .timer-input-group {
        display: flex;
        flex-direction: row;
        align-items: center;
        gap: 0.8rem;
        text-align: left;
    }
    
    .timer-input-group label {
        min-width: 60px;
        margin-bottom: 0;
        font-size: 0.9rem;
    }
    
    .timer-input-group input {
        width: 70px;
        font-size: 1rem;
        padding: 0.4rem;
    }
    
    .color-controls {
        flex-direction: column;
        gap: 1rem;
    }
    
    .color-input-group {
        flex-direction: row;
        align-items: center;
        justify-content: space-between;
        gap: 1rem;
    }
    
    .color-input-group label {
        min-width: 120px;
        margin-bottom: 0;
    }
    
    #base-color {
        width: 50px;
        height: 35px;
    }
    
    #palette-type, #color-count {
        flex: 1;
        max-width: 150px;
    }
    
    .validation-options {
        flex-direction: column;
        gap: 1rem;
    }
    
    .validation-option {
        justify-content: space-between;
        padding: 0.5rem 0;
        border-bottom: 1px solid #dee2e6;
    }
    
    .validation-option:last-child {
        border-bottom: none;
    }
    
    .age-detailed-stats {
        grid-template-columns: 1fr;
        gap: 1rem;
    }
    
    .age-stat-group {
        padding: 1.2rem;
    }
    
    .time-display {
        font-size: 2rem;
    }
    
    .milliseconds {
        font-size: 1.2rem;
    }
    
    .lap-item {
        flex-direction: column;
        gap: 0.25rem;
        text-align: center;
        padding: 0.8rem;
        font-size: 0.9rem;
    }
    
    .lap-times {
        max-height: 250px;
    }
    
    .timer-finished {
        font-size: 1.1rem;
        padding: 0.8rem;
    }
    
    .palette-display {
        grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
        gap: 0.8rem;
    }
    
    .color-item {
        height: 90px;
    }
    
    .color-info {
        padding: 0.4rem;
        font-size: 0.8rem;
    }
    
    .copy-color-btn {
        padding: 0.2rem;
        font-size: 0.8rem;
    }
    
    .palette-actions {
        flex-direction: column;
        gap: 0.8rem;
    }
    
    .email-overall-result {
        font-size: 1.1rem;
        padding: 0.8rem;
        flex-direction: column;
        gap: 0.5rem;
        text-align: center;
    }
    
    .email-result-item {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
        padding: 0.8rem;
    }
    
    .email-result-item i {
        align-self: flex-end;
    }
    
    .age-main-result h3 {
        font-size: 1.3rem;
        line-height: 1.4;
    }
    
    .age-stat-item {
        flex-direction: column;
        gap: 0.3rem;
        text-align: center;
        padding: 0.8rem 0;
    }
}

@media (max-width: 480px) {
    .timer-tabs {
        flex-direction: column;
        border: none;
        gap: 0.5rem;
        margin-bottom: 1rem;
    }
    
    .timer-tab {
        border: 2px solid var(--border-color);
        border-radius: 8px;
        padding: 0.8rem;
        text-align: center;
    }
    
    .timer-tab.active {
        border-color: var(--primary-color);
        background: rgba(102, 126, 234, 0.1);
    }
    
    .time-display {
        font-size: 1.8rem;
    }
    
    .milliseconds {
        font-size: 1rem;
    }
    
    .timer-controls {
        flex-wrap: wrap;
        gap: 0.6rem;
    }
    
    .timer-controls .btn {
        flex: 1;
        min-width: 120px;
        padding: 0.7rem 1rem;
        font-size: 0.9rem;
    }
    
    .timer-input-group {
        width: 100%;
        justify-content: space-between;
        padding: 0.5rem;
        background: var(--bg-secondary);
        border-radius: 8px;
    }
    
    .timer-input-group input {
        width: 80px;
        text-align: center;
    }
    
    .color-input-group {
        width: 100%;
        padding: 0.8rem;
        background: var(--bg-secondary);
        border-radius: 8px;
    }
    
    .color-input-group label {
        font-size: 0.9rem;
        min-width: 100px;
    }
    
    #palette-type, #color-count {
        max-width: 120px;
        font-size: 0.9rem;
    }
    
    .palette-display {
        grid-template-columns: repeat(2, 1fr);
        gap: 0.6rem;
    }
    
    .color-item {
        height: 80px;
    }
    
    .color-info {
        padding: 0.3rem;
        font-size: 0.7rem;
    }
    
    .color-hex {
        font-size: 0.7rem;
    }
    
    .copy-color-btn {
        padding: 0.15rem;
        font-size: 0.7rem;
    }
    
    .validation-options {
        gap: 0.8rem;
    }
    
    .validation-option {
        padding: 0.8rem;
        background: var(--bg-secondary);
        border-radius: 8px;
        border-bottom: none;
    }
    
    .email-results {
        padding: 0.8rem;
    }
    
    .email-overall-result {
        font-size: 1rem;
        padding: 0.8rem;
    }
    
    .email-detailed-results {
        gap: 0.6rem;
    }
    
    .email-result-item {
        padding: 0.6rem;
        font-size: 0.9rem;
    }
    
    .age-main-result {
        padding: 1rem;
    }
    
    .age-main-result h3 {
        font-size: 1.1rem;
    }
    
    .age-stat-group {
        padding: 1rem;
    }
    
    .age-stat-group h4 {
        font-size: 1rem;
        margin-bottom: 0.8rem;
    }
    
    .age-stat-item {
        padding: 0.6rem 0;
        font-size: 0.9rem;
    }
    
    .lap-times {
        max-height: 200px;
        margin-top: 1rem;
    }
    
    .lap-item {
        padding: 0.6rem;
        font-size: 0.8rem;
    }
}

@media (max-width: 360px) {
    .timer-tab {
        padding: 0.6rem;
        font-size: 0.85rem;
    }
    
    .time-display {
        font-size: 1.5rem;
    }
    
    .timer-controls .btn {
        font-size: 0.8rem;
        padding: 0.6rem 0.8rem;
        min-width: 100px;
    }
    
    .timer-input-group input {
        width: 60px;
        font-size: 0.9rem;
    }
    
    .color-input-group {
        flex-direction: column;
        align-items: flex-start;
        gap: 0.5rem;
    }
    
    .color-input-group label {
        font-size: 0.85rem;
        min-width: auto;
    }
    
    #base-color {
        width: 40px;
        height: 30px;
    }
    
    .palette-display {
        grid-template-columns: 1fr 1fr;
        gap: 0.5rem;
    }
    
    .color-item {
        height: 70px;
    }
    
    .validation-option {
        padding: 0.6rem;
        font-size: 0.9rem;
    }
    
    .age-stat-item {
        font-size: 0.85rem;
    }
}