* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #0066ff;
    --secondary-color: #00d4ff;
    --dark-color: #001a4d;
    --light-color: #f5f7fa;
    --text-color: #333;
    --border-color: #ddd;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: #fff;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* Encabezado */
.header {
    background: linear-gradient(135deg, var(--primary-color), var(--dark-color));
    color: white;
    padding: 30px 0;
    box-shadow: var(--shadow);
}

.header .container {
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 20px;
}

.logo {
    width: 80px;
    height: 80px;
    object-fit: contain;
}

.header-text h1 {
    font-size: 28px;
    margin-bottom: 5px;
}

.slogan {
    font-size: 14px;
    font-style: italic;
    opacity: 0.9;
}

/* Navegación */
.navbar {
    background-color: var(--dark-color);
    padding: 15px 0;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: var(--shadow);
}

.nav-menu {
    display: flex;
    list-style: none;
    gap: 30px;
}

.nav-link {
    color: white;
    text-decoration: none;
    font-weight: 500;
    transition: color 0.3s ease;
    padding: 8px 12px;
}

.nav-link:hover,
.nav-link.active {
    color: var(--secondary-color);
    border-bottom: 2px solid var(--secondary-color);
}

/* Sección Hero */
.hero {
    background: linear-gradient(135deg, var(--light-color), #e8f4f8);
    padding: 80px 0;
    text-align: center;
}

.hero-content h2 {
    font-size: 36px;
    margin-bottom: 20px;
    color: var(--dark-color);
}

.hero-content p {
    font-size: 18px;
    color: #666;
    max-width: 600px;
    margin: 0 auto;
}

/* Sección de Herramientas */
.herramientas {
    padding: 80px 0;
    background-color: #fff;
}

.herramientas h2 {
    text-align: center;
    font-size: 32px;
    margin-bottom: 50px;
    color: var(--dark-color);
}

.tools-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 30px;
}

.tool-card {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 10px;
    padding: 30px;
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: var(--shadow);
}

.tool-card:hover {
    transform: translateY(-10px);
    box-shadow: 0 8px 20px rgba(0, 102, 255, 0.2);
    border-color: var(--primary-color);
}

.tool-icon {
    font-size: 48px;
    margin-bottom: 15px;
}

.tool-card h3 {
    font-size: 20px;
    margin-bottom: 15px;
    color: var(--dark-color);
}

.tool-card p {
    color: #666;
    margin-bottom: 20px;
    font-size: 14px;
}

/* Botones */
.btn {
    display: inline-block;
    padding: 12px 30px;
    border-radius: 5px;
    text-decoration: none;
    font-weight: 600;
    transition: all 0.3s ease;
    border: none;
    cursor: pointer;
    font-size: 14px;
}

.btn-primary {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
    color: white;
}

.btn-primary:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px rgba(0, 102, 255, 0.4);
}

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

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

/* Pie de página */
.footer {
    background-color: var(--dark-color);
    color: white;
    padding: 50px 0 20px;
}

.footer-content {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 30px;
    margin-bottom: 30px;
}

.footer-section h4 {
    margin-bottom: 15px;
    color: var(--secondary-color);
}

.footer-section ul {
    list-style: none;
}

.footer-section ul li {
    margin-bottom: 10px;
}

.footer-section a {
    color: #ccc;
    text-decoration: none;
    transition: color 0.3s ease;
}

.footer-section a:hover {
    color: var(--secondary-color);
}

.footer-bottom {
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid rgba(255, 255, 255, 0.1);
    color: #999;
}

/* Formularios */
.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-weight: 600;
    color: var(--dark-color);
}

.form-group input,
.form-group textarea,
.form-group select {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: 5px;
    font-family: inherit;
    font-size: 14px;
}

.form-group input:focus,
.form-group textarea:focus,
.form-group select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 5px rgba(0, 102, 255, 0.3);
}

/* Herramientas */
.tool-container {
    max-width: 800px;
    margin: 40px auto;
    background: white;
    padding: 40px;
    border-radius: 10px;
    box-shadow: var(--shadow);
}

.tool-container h2 {
    color: var(--dark-color);
    margin-bottom: 30px;
    text-align: center;
}

.preview-area {
    margin-top: 30px;
    padding: 20px;
    background-color: var(--light-color);
    border-radius: 8px;
    text-align: center;
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.preview-area img {
    max-width: 100%;
    max-height: 400px;
    object-fit: contain;
}

.alert {
    padding: 15px;
    border-radius: 5px;
    margin-bottom: 20px;
}

.alert-info {
    background-color: #d1ecf1;
    color: #0c5460;
    border: 1px solid #bee5eb;
}

.alert-warning {
    background-color: #fff3cd;
    color: #856404;
    border: 1px solid #ffeaa7;
}

.alert-success {
    background-color: #d4edda;
    color: #155724;
    border: 1px solid #c3e6cb;
}

.alert-error {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
}

/* Responsive */
@media (max-width: 768px) {
    .header .container {
        flex-direction: column;
        text-align: center;
    }

    .logo {
        width: 60px;
        height: 60px;
    }

    .header-text h1 {
        font-size: 20px;
    }

    .nav-menu {
        flex-direction: column;
        gap: 10px;
    }

    .hero-content h2 {
        font-size: 24px;
    }

    .hero-content p {
        font-size: 16px;
    }

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

    .tool-container {
        padding: 20px;
        margin: 20px;
    }
}





/* =========================
   Barra de sesi¨®n
========================= */

.session-bar {
    background: var(--dark-color);
    color: white;
    padding: 12px 0;
    border-top: 1px solid rgba(255,255,255,0.05);
    border-bottom: 1px solid rgba(255,255,255,0.08);
}

.session-bar .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 15px;
    flex-wrap: wrap;
}

.session-info {
    display: flex;
    align-items: center;
    gap: 12px;
    flex-wrap: wrap;
}

.status-dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: inline-block;
    flex-shrink: 0;
    background: #3b82f6;
    box-shadow: 0 0 8px rgba(59, 130, 246, 0.8);
}

.session-text {
    display: flex;
    flex-direction: column;
    gap: 4px;
}

.session-line-main {
    display: flex;
    align-items: center;
    gap: 6px;
    flex-wrap: wrap;
    font-size: 15px;
}

.session-line-main strong {
    color: #00d4ff;
    font-size: 16px;
}

.session-line-meta {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    font-size: 13px;
    color: #f1f5f9;
}

.session-meta-item {
    display: inline-block;
}

.logout-btn,
.login-btn {
    display: inline-block;
    text-decoration: none;
    padding: 9px 16px;
    border-radius: 7px;
    font-size: 13px;
    font-weight: 600;
    transition: 0.3s ease;
    white-space: nowrap;
    color: white;
}

.logout-btn {
    background: #ef4444;
}

.logout-btn:hover {
    background: #dc2626;
    transform: translateY(-1px);
}

.login-btn {
    background: #2563eb;
}

.login-btn:hover {
    background: #1d4ed8;
    transform: translateY(-1px);
}

@media (max-width: 768px) {
    .session-bar .container {
        flex-direction: column;
        align-items: flex-start;
    }

    .logout-btn,
    .login-btn {
        width: 100%;
        text-align: center;
    }
}