:root {
    /* Corporate Green Palette */
    --primary-color: #2E7D32;
    /* Dark Green */
    --secondary-color: #4CAF50;
    /* Medium Green */
    --accent-color: #81C784;
    /* Light Green */
    --bg-color: #f0f2f5;
    /* Light Gray Background */
    --card-bg: #ffffff;
    --text-color: #333333;
    --text-muted: #666666;
    --border-color: #e0e0e0;
    --shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
    --radius: 8px;
}

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

body {
    font-family: 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-color);
    line-height: 1.6;
    font-size: 16px;
}

a {
    text-decoration: none;
    color: var(--primary-color);
    transition: color 0.3s;
}

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

/* Layout */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    width: 95%;
}

header {
    background: var(--card-bg);
    padding: 15px 20px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    margin-bottom: 20px;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 10px;
}

@media (min-width: 768px) {
    header {
        flex-direction: row;
        justify-content: space-between;
    }
}

header h1 {
    color: var(--primary-color);
    font-size: 2rem;
    margin: 0;
    font-weight: 700;
}

nav {
    display: flex;
    gap: 15px;
    flex-wrap: wrap;
    justify-content: center;
}

nav a {
    font-weight: 500;
    color: var(--text-color);
    padding: 5px 10px;
    border-radius: 4px;
}

nav a:hover {
    background-color: var(--bg-color);
    color: var(--primary-color);
}

/* Buttons */
.btn-primary {
    background-color: var(--primary-color);
    color: white !important;
    padding: 10px 20px;
    border: none;
    border-radius: var(--radius);
    cursor: pointer;
    font-size: 1rem;
    display: inline-block;
    text-align: center;
    transition: background 0.3s, transform 0.1s;
}

.btn-primary:hover {
    background-color: var(--secondary-color);
    transform: translateY(-1px);
}

.btn-danger {
    background-color: #e53935;
    color: white !important;
    padding: 5px 10px;
    border-radius: 4px;
    font-size: 0.9rem;
}

/* Forms */
.login-box,
.form-box {
    background: var(--card-bg);
    padding: 30px;
    border-radius: var(--radius);
    box-shadow: var(--shadow);
    width: 100%;
    max-width: 500px;
    margin: 20px auto;
}

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

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

.form-group input,
.form-group select,
.form-group textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border-color);
    border-radius: var(--radius);
    font-size: 1rem;
    transition: border-color 0.3s;
}

.form-group input:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 2px rgba(46, 125, 50, 0.2);
}

/* Tables */
.table-responsive {
    overflow-x: auto;
    background: var(--card-bg);
    border-radius: var(--radius);
    box-shadow: var(--shadow);
}

table {
    width: 100%;
    border-collapse: collapse;
    min-width: 600px;
}

th,
td {
    padding: 15px;
    text-align: left;
    border-bottom: 1px solid var(--border-color);
}

th {
    background-color: var(--bg-color);
    color: var(--primary-color);
    font-weight: 600;
}

tr:hover {
    background-color: #f9f9f9;
}

/* Dashboard Cards */
.dashboard-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-top: 30px;
}

.card {
    background: var(--card-bg);
    padding: 25px;
    border-radius: 12px;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.05);
    border-top: 4px solid var(--primary-color);
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
    transform: translateY(-5px);
    box-shadow: 0 8px 15px rgba(0, 0, 0, 0.1);
}

.card h3 {
    margin-bottom: 10px;
    color: var(--primary-color);
}

.card p {
    font-size: 2rem;
    font-weight: bold;
    color: var(--text-color);
}


/* Tablet Optimization */
@media (max-width: 900px) {
    header h1 {
        font-size: 1.75rem;
    }

    nav a {
        font-size: 0.95rem;
    }
}

/* Mobile Optimization */
@media (max-width: 600px) {
    .container {
        padding: 10px;
    }

    header {
        padding: 20px 15px;
    }

    h1,
    header h1 {
        font-size: 1.8rem;
        font-weight: 700;
    }

    nav {
        width: 100%;
        flex-direction: column;
        gap: 10px;
    }

    nav a {
        font-size: 1rem;
        padding: 12px 15px;
        text-align: center;
        display: block;
    }

    .btn-primary {
        width: 100%;
        margin-bottom: 10px;
        padding: 14px 20px;
        font-size: 1.1rem;
    }

    /* Formularios en móviles */
    form {
        flex-direction: column !important;
        align-items: stretch !important;
    }

    form>div {
        width: 100%;
        margin-bottom: 15px;
    }

    form label {
        font-size: 1rem;
        margin-bottom: 8px;
        display: block;
    }

    form select,
    form input {
        width: 100%;
        padding: 14px;
        font-size: 1.1rem;
        margin-left: 0 !important;
    }

    form button[type="submit"] {
        padding: 14px 20px;
        font-size: 1.1rem;
    }

    /* Card view for tables on mobile */
    .table-responsive table {
        width: 100%;
        border: 0;
    }

    .table-responsive thead {
        display: none;
    }

    .table-responsive tr {
        display: block;
        margin-bottom: 1rem;
        border: 1px solid var(--border-color);
        border-radius: var(--radius);
        padding: 10px;
    }

    .table-responsive td {
        display: block;
        text-align: right;
        padding: 12px 10px 12px 50%;
        position: relative;
        font-size: 1rem;
    }

    .table-responsive td::before {
        content: attr(data-label);
        position: absolute;
        left: 10px;
        width: calc(50% - 20px);
        font-weight: 600;
        text-align: left;
        color: var(--text-muted);
        font-size: 1rem;
    }
}

/* Login Container */
.login-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    padding: 20px;
}

/* Google OAuth Button */
.google-signin-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    width: 100%;
    padding: 12px 20px;
    background-color: white;
    border: 1px solid #dadce0;
    border-radius: var(--radius);
    font-size: 14px;
    font-weight: 500;
    color: #3c4043;
    cursor: pointer;
    transition: background-color 0.2s, box-shadow 0.2s, border-color 0.2s;
    text-decoration: none;
    margin-top: 10px;
}

.google-signin-btn:hover {
    background-color: #f8f9fa;
    border-color: #d2d3d4;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.1);
    color: #3c4043;
}

.google-signin-btn svg {
    flex-shrink: 0;
}

/* Login Separator */
.login-separator {
    display: flex;
    align-items: center;
    text-align: center;
    margin: 20px 0;
    color: var(--text-muted);
    font-size: 0.9rem;
}

.login-separator::before,
.login-separator::after {
    content: '';
    flex: 1;
    border-bottom: 1px solid var(--border-color);
}

.login-separator span {
    padding: 0 15px;
}

/* Alert Messages */
.alert {
    padding: 12px 16px;
    border-radius: var(--radius);
    margin-bottom: 20px;
    font-size: 0.95rem;
}

.alert-danger {
    background-color: #ffebee;
    color: #c62828;
    border-left: 4px solid #c62828;
}

.alert-success {
    background-color: #e8f5e9;
    color: #2e7d32;
    border-left: 4px solid #2e7d32;
}