/* Ingeniería Parra - SEC Branding Colors */
:root {
    --primary-color: #004876;
    /* SEC Dark Blue */
    --secondary-color: #003557;
    /* Darker Blue for contrast */
    --accent-color: #00A9CE;
    /* SEC Cyan/Turquoise */
    --accent-red: #E31E24;
    /* SEC Red accent */
    --text-dark: #2c3e50;
    --text-light: #ffffff;
    --bg-light: #f0f5f8;
    --border-color: #bdc3c7;
    --success-color: #27ae60;
    --warning-color: #f39c12;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-dark);
    background-color: #ffffff;
    font-size: 0.95rem;
}

/* Header */
header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: var(--text-light);
    padding: 2rem 0;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.header-content {
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 2rem;
    text-align: center;
}

.header-content h1 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
    font-weight: 700;
}

.header-subtitle {
    font-size: 1rem;
    margin-bottom: 0.5rem;
    opacity: 0.95;
}

.certification {
    display: inline-block;
    background: rgba(255, 255, 255, 0.2);
    padding: 0.4rem 1.2rem;
    border-radius: 25px;
    margin-top: 1rem;
    font-size: 0.85rem;
    border: 2px solid rgba(255, 255, 255, 0.3);
}

/* Navigation */
nav {
    background-color: var(--secondary-color);
    padding: 1rem 0;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

nav ul {
    list-style: none;
    display: flex;
    justify-content: center;
    gap: 2rem;
    max-width: 1000px;
    margin: 0 auto;
    padding: 0 2rem;
}

nav a {
    color: var(--text-light);
    text-decoration: none;
    font-weight: 500;
    padding: 0.5rem 1rem;
    transition: all 0.3s ease;
    border-radius: 5px;
}

nav a:hover {
    background-color: var(--accent-color);
    transform: translateY(-2px);
}

/* Main Container */
.container {
    max-width: 1000px;
    margin: 3rem auto;
    padding: 0 2rem;
}

/* Hero Section */
.hero {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    padding: 3rem;
    border-radius: 10px;
    margin-bottom: 3rem;
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.08);
}

.hero h2 {
    color: var(--primary-color);
    font-size: 1.6rem;
    margin-bottom: 1rem;
}

.engineer-name {
    font-size: 1.5rem;
    color: var(--accent-color);
    font-weight: 700;
    margin: 1.5rem 0;
}

.class-badge {
    display: inline-block;
    background-color: var(--accent-red);
    color: white;
    padding: 0.5rem 1.5rem;
    border-radius: 5px;
    font-weight: 600;
    margin: 1rem 0;
    transition: all 0.3s ease;
    text-decoration: none;
}

.class-badge:hover {
    background-color: #c91a1f;
    transform: scale(1.05);
}

/* Services Grid */
.services-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 2rem;
    margin: 2rem 0;
}

.service-card {
    background: white;
    padding: 2rem;
    border-radius: 8px;
    box-shadow: 0 3px 10px rgba(0, 0, 0, 0.1);
    border-left: 4px solid var(--accent-color);
    transition: all 0.3s ease;
}

.service-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.15);
}

.service-card h3 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    font-size: 1.1rem;
}

.service-card ul {
    list-style: none;
}

.service-card li {
    padding: 0.5rem 0;
    padding-left: 1.5rem;
    position: relative;
}

.service-card li:before {
    content: "✓";
    position: absolute;
    left: 0;
    color: var(--success-color);
    font-weight: bold;
}

/* Contact Form */
.contact-form {
    background: white;
    padding: 3rem;
    border-radius: 10px;
    box-shadow: 0 5px 20px rgba(0, 0, 0, 0.1);
    max-width: 600px;
    margin: 0 auto;
}

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

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    color: var(--primary-color);
    font-weight: 600;
}

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 0.8rem;
    border: 2px solid var(--border-color);
    border-radius: 5px;
    font-size: 1rem;
    transition: border-color 0.3s ease;
}

.form-group input:focus,
.form-group select:focus,
.form-group textarea:focus {
    outline: none;
    border-color: var(--accent-color);
}

.btn {
    background: linear-gradient(135deg, var(--accent-color) 0%, #2980b9 100%);
    color: white;
    padding: 0.9rem 2rem;
    border: none;
    border-radius: 5px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    width: 100%;
}

.btn:hover {
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(52, 152, 219, 0.4);
}

/* Alert Messages */
.alert {
    padding: 1rem;
    border-radius: 5px;
    margin-bottom: 1rem;
}

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

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

/* Footer */
footer {
    background-color: var(--primary-color);
    color: var(--text-light);
    text-align: center;
    padding: 2rem 0;
    margin-top: 4rem;
}

/* Responsive Design - Multiple Breakpoints */

/* Tablets and smaller (max-width: 768px) */
@media (max-width: 768px) {
    .header-content h1 {
        font-size: 1.6rem;
    }

    .header-subtitle {
        font-size: 0.9rem;
    }

    .certification {
        font-size: 0.75rem;
        padding: 0.3rem 1rem;
    }

    nav ul {
        flex-direction: column;
        gap: 0;
        padding: 0;
    }

    nav li {
        text-align: center;
        border-bottom: 1px solid rgba(255, 255, 255, 0.1);
    }

    nav a {
        display: block;
        padding: 0.8rem 1rem;
    }

    .container {
        margin: 2rem auto;
        padding: 0 1.5rem;
    }

    .hero {
        padding: 1.5rem;
    }

    .hero h2 {
        font-size: 1.3rem;
    }

    .engineer-name {
        font-size: 1.3rem;
    }

    .class-badge {
        font-size: 0.9rem;
        padding: 0.4rem 1.2rem;
    }

    .services-grid {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .service-card {
        padding: 1.5rem;
    }

    .service-card h3 {
        font-size: 1rem;
    }

    .contact-form {
        padding: 2rem 1.5rem;
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
        font-size: 0.95rem;
    }

    .btn {
        font-size: 0.95rem;
        padding: 0.8rem 1.5rem;
    }
}

/* Mobile devices (max-width: 480px) */
@media (max-width: 480px) {
    header {
        padding: 1.5rem 0;
    }

    .header-content {
        padding: 0 1rem;
    }

    .header-content h1 {
        font-size: 1.4rem;
    }

    .header-subtitle {
        font-size: 0.85rem;
    }

    .certification {
        font-size: 0.7rem;
        padding: 0.3rem 0.8rem;
    }

    nav {
        padding: 0.5rem 0;
    }

    nav a {
        padding: 0.7rem 0.5rem;
        font-size: 0.9rem;
    }

    .container {
        margin: 1.5rem auto;
        padding: 0 1rem;
    }

    .hero {
        padding: 1.2rem;
        margin-bottom: 2rem;
    }

    .hero h2 {
        font-size: 1.2rem;
    }

    .engineer-name {
        font-size: 1.2rem;
        margin: 1rem 0;
    }

    .class-badge {
        font-size: 0.85rem;
        padding: 0.35rem 1rem;
    }

    .services-grid {
        gap: 1.2rem;
        margin: 1.5rem 0;
    }

    .service-card {
        padding: 1.2rem;
    }

    .service-card h3 {
        font-size: 0.95rem;
        margin-bottom: 0.8rem;
    }

    .service-card p {
        font-size: 0.85rem;
        line-height: 1.5;
    }

    .contact-form {
        padding: 1.5rem 1rem;
    }

    .form-group {
        margin-bottom: 1.2rem;
    }

    .form-group label {
        font-size: 0.9rem;
    }

    .form-group input,
    .form-group select,
    .form-group textarea {
        font-size: 0.9rem;
        padding: 0.7rem;
    }

    .btn {
        font-size: 0.9rem;
        padding: 0.75rem 1.2rem;
    }

    footer {
        padding: 1.5rem 1rem;
        font-size: 0.85rem;
    }
}

/* Large tablets and small desktops (min-width: 769px and max-width: 1024px) */
@media (min-width: 769px) and (max-width: 1024px) {
    .container {
        max-width: 900px;
    }

    .header-content {
        max-width: 900px;
    }

    nav ul {
        max-width: 900px;
    }

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

/* ==================== BACK OFFICE STYLES ==================== */

/* Login Page */
.login-container {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    padding: 2rem;
}

.login-box {
    background: white;
    padding: 3rem;
    border-radius: 10px;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.2);
    width: 100%;
    max-width: 400px;
}

.login-box h1 {
    color: var(--primary-color);
    text-align: center;
    margin-bottom: 0.5rem;
    font-size: 1.8rem;
}

.login-box h2 {
    color: var(--text-dark);
    text-align: center;
    margin-bottom: 2rem;
    font-size: 1.3rem;
    font-weight: 400;
}

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

.login-form .btn {
    margin-top: 1rem;
}

.login-footer {
    text-align: center;
    margin-top: 1.5rem;
    font-size: 0.9rem;
}

.login-footer a {
    color: var(--accent-color);
    text-decoration: none;
    transition: color 0.3s ease;
}

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

/* Back Office Container */
.backoffice-container {
    min-height: 100vh;
    background-color: #f5f7fa;
}

.backoffice-header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 1.5rem 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    flex-wrap: wrap;
    gap: 1rem;
}

.backoffice-header h1 {
    font-size: 1.5rem;
    margin: 0;
}

.backoffice-actions {
    display: flex;
    gap: 1rem;
    align-items: center;
    flex-wrap: wrap;
}

.welcome-text {
    font-size: 0.9rem;
    opacity: 0.9;
}

.backoffice-main {
    max-width: 1400px;
    margin: 2rem auto;
    padding: 0 2rem;
}

.stats-bar {
    background: white;
    padding: 1.5rem;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    margin-bottom: 2rem;
}

.stat-item {
    font-size: 1.1rem;
    color: var(--text-dark);
}

.stat-item strong {
    color: var(--primary-color);
}

/* Data Table */
.table-container {
    background: white;
    border-radius: 8px;
    box-shadow: 0 2px 10px rgba(0, 0, 0, 0.08);
    overflow: hidden;
}

.data-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

.data-table thead {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
}

.data-table th {
    padding: 1rem;
    text-align: left;
    font-weight: 600;
    white-space: nowrap;
}

.data-table td {
    padding: 1rem;
    border-bottom: 1px solid #e9ecef;
}

.data-table tbody tr {
    transition: background-color 0.2s ease;
}

.data-table tbody tr:hover {
    background-color: #f8f9fa;
}

.data-table tbody tr:last-child td {
    border-bottom: none;
}

.no-data {
    padding: 3rem;
    text-align: center;
    color: #6c757d;
    font-size: 1.1rem;
}

/* Button Variants for Back Office */
.btn-success {
    background: linear-gradient(135deg, var(--success-color) 0%, #229954 100%);
    width: auto;
}

.btn-success:hover {
    box-shadow: 0 5px 15px rgba(39, 174, 96, 0.4);
}

.btn-secondary {
    background: linear-gradient(135deg, #95a5a6 0%, #7f8c8d 100%);
    width: auto;
}

.btn-secondary:hover {
    box-shadow: 0 5px 15px rgba(127, 140, 141, 0.4);
}

/* Responsive Back Office */
@media (max-width: 768px) {
    .backoffice-header {
        flex-direction: column;
        align-items: flex-start;
    }

    .backoffice-header h1 {
        font-size: 1.2rem;
    }

    .backoffice-actions {
        width: 100%;
        justify-content: space-between;
    }

    .welcome-text {
        width: 100%;
        margin-bottom: 0.5rem;
    }

    .backoffice-main {
        padding: 0 1rem;
    }

    .table-container {
        overflow-x: auto;
    }

    .data-table {
        font-size: 0.8rem;
    }

    .data-table th,
    .data-table td {
        padding: 0.7rem 0.5rem;
    }

    .login-box {
        padding: 2rem 1.5rem;
    }

    .btn-success,
    .btn-secondary {
        font-size: 0.85rem;
        padding: 0.7rem 1.2rem;
    }
}

@media (max-width: 480px) {

    .data-table th,
    .data-table td {
        padding: 0.5rem 0.3rem;
        font-size: 0.75rem;
    }

    .backoffice-header {
        padding: 1rem;
    }

    .stats-bar {
        padding: 1rem;
    }
}