/* styles.css - Versión Moderna y Profesional */
:root {
    --primary: #4361ee;
    --primary-dark: #3a56d4;
    --secondary: #7209b7;
    --accent: #f72585;
    --success: #4cc9f0;
    --warning: #f8961e;
    --error: #e63946;
    --dark: #1d3557;
    --light: #f1faee;
    --gray-100: #f8f9fa;
    --gray-200: #e9ecef;
    --gray-300: #dee2e6;
    --gray-600: #6c757d;
    --gray-800: #343a40;
    --shadow: 0 10px 30px rgba(0, 0, 0, 0.08);
    --shadow-lg: 0 20px 50px rgba(0, 0, 0, 0.15);
    --border-radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

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

body {
    font-family: 'Inter', 'Segoe UI', system-ui, -apple-system, sans-serif;
    line-height: 1.6;
    color: var(--dark);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    font-weight: 400;
}

/* Header Moderno */
header {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    border-bottom: 1px solid rgba(255, 255, 255, 0.2);
    box-shadow: var(--shadow);
    padding: 1rem 0;
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header-content {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    height: 45px;
    width: auto;
    filter: drop-shadow(0 2px 4px rgba(0, 0, 0, 0.1));
}

.header-title {
    color: var(--dark);
    font-size: 1.1rem;
    font-weight: 600;
    opacity: 0.8;
}

/* Layout Principal */
.container {
    max-width: 1200px;
    margin: 3rem auto;
    padding: 0 2rem;
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 2.5rem;
    align-items: start;
}

.column {
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(20px);
    -webkit-backdrop-filter: blur(20px);
    padding: 2.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    border: 1px solid rgba(255, 255, 255, 0.3);
    transition: var(--transition);
}

.column:hover {
    transform: translateY(-5px);
    box-shadow: 0 25px 60px rgba(0, 0, 0, 0.15);
}

.column.right {
    background: rgba(255, 255, 255, 0.98);
}

/* Tipografía */
h1 {
    color: var(--dark);
    margin-bottom: 2rem;
    font-size: 1.8rem;
    font-weight: 700;
    text-align: center;
    position: relative;
    padding-bottom: 1rem;
}

h1::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary));
    border-radius: 2px;
}

/* Formularios Modernos */
#form-container {
    margin-top: 1rem;
}

form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

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

label {
    font-weight: 600;
    color: var(--dark);
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

input[type="text"],
select {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--gray-200);
    border-radius: 10px;
    font-size: 16px;
    transition: var(--transition);
    background: var(--gray-100);
    font-family: inherit;
}

input[type="text"]:focus,
select:focus {
    outline: none;
    border-color: var(--primary);
    background: white;
    box-shadow: 0 0 0 4px rgba(67, 97, 238, 0.1);
    transform: translateY(-2px);
}

.combobox {
    position: relative;
}

.combobox select {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='24' height='24' viewBox='0 0 24 24' fill='none' stroke='%236c757d' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'%3E%3Cpolyline points='6 9 12 15 18 9'%3E%3C/polyline%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    background-size: 16px;
}

/* Botones Modernos */
.btn {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: 16px 32px;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 1rem;
    position: relative;
    overflow: hidden;
    font-family: inherit;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(67, 97, 238, 0.3);
}

.btn:hover::before {
    left: 100%;
}

.btn:active {
    transform: translateY(-1px);
}

/* Sección PDF */
#pdf-container {
    margin-top: 1rem;
}

#search {
    margin-bottom: 1.5rem;
    border-radius: 25px;
    padding: 12px 20px;
}

#customers {
    width: 100%;
    border-collapse: separate;
    border-spacing: 0;
    margin-top: 1rem;
    border-radius: 10px;
    overflow: hidden;
    box-shadow: var(--shadow);
}

#customers th {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    font-weight: 600;
    padding: 16px;
    text-align: left;
    font-size: 0.9rem;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

#customers td {
    padding: 14px 16px;
    border-bottom: 1px solid var(--gray-200);
    transition: var(--transition);
}

#customers tr:last-child td {
    border-bottom: none;
}

#customers tr:hover td {
    background: var(--gray-100);
    transform: scale(1.02);
}

#customers a {
    color: var(--primary);
    text-decoration: none;
    font-weight: 500;
    transition: var(--transition);
    position: relative;
}

#customers a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--primary);
    transition: width 0.3s ease;
}

#customers a:hover {
    color: var(--primary-dark);
}

#customers a:hover::after {
    width: 100%;
}

/* Footer Moderno */
footer {
    background: var(--dark);
    color: white;
    text-align: center;
    padding: 3rem 2rem;
    margin-top: 4rem;
    position: relative;
}

footer::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--primary), var(--secondary), var(--accent));
}

footer a {
    color: var(--success);
    text-decoration: none;
    font-weight: 600;
    transition: var(--transition);
    position: relative;
}

footer a::after {
    content: '';
    position: absolute;
    bottom: -2px;
    left: 0;
    width: 0;
    height: 2px;
    background: var(--success);
    transition: width 0.3s ease;
}

footer a:hover {
    color: #90e0ef;
}

footer a:hover::after {
    width: 100%;
}

/* Spinner Moderno */
.spinner {
    display: none;
    border: 3px solid var(--gray-200);
    border-top: 3px solid var(--primary);
    border-radius: 50%;
    width: 50px;
    height: 50px;
    animation: spin 1s linear infinite;
    margin: 2rem auto;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.1);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Progress Bar Moderna */
.progress-container {
    width: 100%;
    max-height: 500px;
    overflow: hidden;
}

.progress-bar {
    width: 100%;
    height: 12px;
    background: var(--gray-200);
    border-radius: 10px;
    overflow: hidden;
    margin-bottom: 1.5rem;
    position: relative;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.1);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--success), #4cc9f0);
    width: 0%;
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    border-radius: 10px;
    position: relative;
    overflow: hidden;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: shimmer 2s infinite;
}

@keyframes shimmer {
    0% { left: -100%; }
    100% { left: 100%; }
}

.progress-text {
    text-align: center;
    font-weight: 700;
    margin-bottom: 1.5rem;
    color: var(--dark);
    font-size: 1.1rem;
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.progress-messages {
    max-height: 350px;
    overflow-y: auto;
    text-align: left;
    font-size: 0.85rem;
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    background: var(--gray-100);
    padding: 1.5rem;
    border-radius: 12px;
    border: 1px solid var(--gray-200);
    box-shadow: inset 0 2px 8px rgba(0, 0, 0, 0.05);
}

/* Scrollbar Personalizado */
.progress-messages::-webkit-scrollbar {
    width: 8px;
}

.progress-messages::-webkit-scrollbar-track {
    background: var(--gray-200);
    border-radius: 4px;
}

.progress-messages::-webkit-scrollbar-thumb {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    border-radius: 4px;
}

.progress-messages::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, var(--primary-dark), #5a189a);
}

.progress-message {
    padding: 12px;
    margin: 8px 0;
    border-radius: 8px;
    border-left: 4px solid var(--gray-600);
    background: white;
    word-wrap: break-word;
    line-height: 1.5;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
    transition: var(--transition);
}

.progress-message:hover {
    transform: translateX(5px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.progress-message.info { 
    background: linear-gradient(135deg, #e3f2fd, #bbdefb);
    border-left-color: #2196F3;
    color: #1565c0;
}

.progress-message.success { 
    background: linear-gradient(135deg, #e8f5e8, #c8e6c9);
    border-left-color: #4CAF50;
    color: #2e7d32;
    font-weight: 600;
}

.progress-message.warning { 
    background: linear-gradient(135deg, #fff3e0, #ffe0b2);
    border-left-color: #FF9800;
    color: #ef6c00;
}

.progress-message.error { 
    background: linear-gradient(135deg, #ffebee, #ffcdd2);
    border-left-color: #F44336;
    color: #c62828;
    font-weight: 600;
}

/* Responsive Design */
@media (max-width: 968px) {
    .container {
        grid-template-columns: 1fr;
        gap: 2rem;
        margin: 2rem auto;
    }
    
    .column {
        padding: 2rem;
    }
    
    .header-content {
        flex-direction: column;
        gap: 1rem;
        text-align: center;
    }
}

@media (max-width: 768px) {
    .container {
        padding: 0 1rem;
    }
    
    .column {
        padding: 1.5rem;
    }
    
    h1 {
        font-size: 1.5rem;
    }
    
    .btn {
        padding: 14px 24px;
    }
}

/* Efectos de partículas de fondo (opcional) */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: 
        radial-gradient(circle at 20% 80%, rgba(120, 119, 198, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 80% 20%, rgba(255, 119, 198, 0.1) 0%, transparent 50%),
        radial-gradient(circle at 40% 40%, rgba(120, 219, 226, 0.1) 0%, transparent 50%);
    pointer-events: none;
    z-index: -1;
}

/* Animaciones de entrada */
.column {
    animation: fadeInUp 0.6s ease-out;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

/* Estados de carga */
.loading {
    position: relative;
    overflow: hidden;
}

.loading::after {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.4), transparent);
    animation: loading 1.5s infinite;
}

@keyframes loading {
    0% { left: -100%; }
    100% { left: 100%; }
}

/* Contenedor principal del login */
.login-container {
    max-width: 500px;
    margin: 4rem auto;
    grid-template-columns: 1fr;
}

/* Ajustes específicos para el formulario de login */
.login-form {
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
    margin-top: 1rem;
}

/* Campos de formulario en login */
.login-form .form-group {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.login-form input[type="text"],
.login-form input[type="password"] {
    width: 100%;
    padding: 14px 16px;
    border: 2px solid var(--gray-200);
    border-radius: 10px;
    font-size: 16px;
    transition: var(--transition);
    background: var(--gray-100);
    font-family: inherit;
}

.login-form input[type="text"]:focus,
.login-form input[type="password"]:focus {
    outline: none;
    border-color: var(--primary);
    background: white;
    box-shadow: 0 0 0 4px rgba(67, 97, 238, 0.1);
    transform: translateY(-2px);
}

/* Botón de login específico */
.login-btn {
    background: linear-gradient(135deg, var(--primary), var(--secondary));
    color: white;
    padding: 16px 32px;
    border: none;
    border-radius: 10px;
    font-size: 16px;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    margin-top: 1rem;
    width: 100%;
    position: relative;
    overflow: hidden;
}

.login-btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.2), transparent);
    transition: left 0.5s;
}

.login-btn:hover {
    transform: translateY(-3px);
    box-shadow: 0 10px 25px rgba(137, 172, 206, 0.3);
}

.login-btn:hover::before {
    left: 100%;
}

/* Mensajes de error en login */
.login-error {
    background: linear-gradient(135deg, #ffebee, #ffcdd2);
    border-left: 4px solid #F44336;
    color: #c62828;
    padding: 12px 16px;
    border-radius: 8px;
    margin: 1rem 0;
    font-weight: 600;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

/* Ajustes responsive para login */
@media (max-width: 768px) {
    .login-container {
        margin: 2rem auto;
        padding: 0 1rem;
    }
    
    .login-form input[type="text"],
    .login-form input[type="password"] {
        padding: 12px 14px;
    }
    
    .login-btn {
        padding: 14px 24px;
    }
}