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

/* Variables CSS para colores elegantes */
:root {
    --primary-color: #2c3e50;
    --secondary-color: #34495e;
    --accent-color: #3498db;
    --accent-hover: #2980b9;
    --success-color: #27ae60;
    --success-hover: #229954;
    --warning-color: #f39c12;
    --warning-hover: #e67e22;
    --danger-color: #e74c3c;
    --danger-hover: #c0392b;
    --light-gray: #ecf0f1;
    --medium-gray: #bdc3c7;
    --dark-gray: #7f8c8d;
    --text-primary: #2c3e50;
    --text-secondary: #5a6c7d;
    --text-light: #95a5a6;
    --background: #f8f9fa;
    --white: #ffffff;
    --shadow-light: 0 2px 10px rgba(44, 62, 80, 0.1);
    --shadow-medium: 0 4px 20px rgba(44, 62, 80, 0.15);
    --shadow-heavy: 0 8px 30px rgba(44, 62, 80, 0.2);
    --border-radius: 12px;
    --border-radius-small: 8px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Configuración base del documento */
html {
    font-size: 16px;
    scroll-behavior: smooth;
}

body {
    font-family: 'Roboto', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: var(--text-primary);
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 20px;
    overflow-x: hidden;
}

/* Contenedor principal */
.container {
    background: var(--white);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-heavy);
    padding: 3rem 2.5rem;
    max-width: 900px;
    width: 100%;
    position: relative;
    overflow: hidden;
    margin: auto;
}

.container::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: linear-gradient(90deg, var(--accent-color), var(--success-color), var(--warning-color));
}

/* Título principal */
h1 {
    font-size: 2.5rem;
    font-weight: 700;
    text-align: center;
    color: var(--primary-color);
    margin-bottom: 2rem;
    position: relative;
    letter-spacing: -0.5px;
    line-height: 1.2;
}

h1::after {
    content: '';
    position: absolute;
    bottom: -10px;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 3px;
    background: var(--accent-color);
    border-radius: 2px;
}

/* Instrucciones */
.instructions {
    background: linear-gradient(135deg, #f8f9fa 0%, #e9ecef 100%);
    border: 1px solid var(--light-gray);
    border-radius: var(--border-radius-small);
    padding: 1.5rem;
    margin-bottom: 2rem;
    position: relative;
}

.instructions::before {
    content: '📋';
    position: absolute;
    top: -10px;
    left: 20px;
    background: var(--white);
    padding: 5px 10px;
    border-radius: 20px;
    font-size: 1.2rem;
    box-shadow: var(--shadow-light);
}

.instructions p {
    color: var(--text-secondary);
    margin-bottom: 1rem;
    font-weight: 500;
}

.instructions strong {
    color: var(--primary-color);
    font-weight: 600;
}

.instructions ul {
    margin: 1rem 0;
    padding-left: 1.5rem;
}

.instructions li {
    color: var(--text-secondary);
    margin-bottom: 0.5rem;
    position: relative;
}

.instructions li::before {
    content: '•';
    color: var(--accent-color);
    font-weight: bold;
    position: absolute;
    left: -1rem;
}

/* Grupos de entrada */
.input-group {
    margin-bottom: 1.5rem;
    position: relative;
}

/* Botón de descarga */
.download-button {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    background: linear-gradient(135deg, var(--success-color), var(--success-hover));
    color: var(--white);
    text-decoration: none;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--border-radius-small);
    transition: var(--transition);
    box-shadow: var(--shadow-light);
    border: none;
    cursor: pointer;
    width: 100%;
    position: relative;
    overflow: hidden;
}

.download-button::before {
    content: '📥';
    font-size: 1.2rem;
}

.download-button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
    background: linear-gradient(135deg, var(--success-hover), var(--success-color));
}

.download-button:active {
    transform: translateY(0);
}

/* Input de archivo */
input[type="file"] {
    width: 100%;
    padding: 1rem;
    border: 2px dashed var(--medium-gray);
    border-radius: var(--border-radius-small);
    background: var(--background);
    color: var(--text-secondary);
    font-size: 1rem;
    transition: var(--transition);
    cursor: pointer;
}

input[type="file"]:hover {
    border-color: var(--accent-color);
    background: var(--white);
}

input[type="file"]:focus {
    outline: none;
    border-color: var(--accent-color);
    box-shadow: 0 0 0 3px rgba(52, 152, 219, 0.1);
}

/* Botones principales */
button {
    background: linear-gradient(135deg, var(--accent-color), var(--accent-hover));
    color: var(--white);
    border: none;
    padding: 1rem 2rem;
    font-size: 1rem;
    font-weight: 600;
    border-radius: var(--border-radius-small);
    cursor: pointer;
    transition: var(--transition);
    box-shadow: var(--shadow-light);
    width: 100%;
    position: relative;
    overflow: hidden;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

button::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;
}

button:hover::before {
    left: 100%;
}

button:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-medium);
    background: linear-gradient(135deg, var(--accent-hover), var(--accent-color));
}

button:active {
    transform: translateY(0);
}

/* Botones específicos con colores diferenciados */
button[onclick*="DXF"] {
    background: linear-gradient(135deg, var(--primary-color), var(--secondary-color));
}

button[onclick*="DXF"]:hover {
    background: linear-gradient(135deg, var(--secondary-color), var(--primary-color));
}

button[onclick*="KML"] {
    background: linear-gradient(135deg, var(--success-color), var(--success-hover));
}

button[onclick*="KML"]:hover {
    background: linear-gradient(135deg, var(--success-hover), var(--success-color));
}

button[onclick*="KMZ"] {
    background: linear-gradient(135deg, var(--warning-color), var(--warning-hover));
}

button[onclick*="KMZ"]:hover {
    background: linear-gradient(135deg, var(--warning-hover), var(--warning-color));
}

button[onclick*="Shapefile"] {
    background: linear-gradient(135deg, var(--danger-color), var(--danger-hover));
}

button[onclick*="Shapefile"]:hover {
    background: linear-gradient(135deg, var(--danger-hover), var(--danger-color));
}

/* Footer */
.footer {
    text-align: center;
    margin-top: 2rem;
    padding-top: 2rem;
    border-top: 1px solid var(--light-gray);
    color: var(--text-light);
    font-size: 0.9rem;
    font-weight: 500;
}

/* ===== RESPONSIVE DESIGN COMPLETO ===== */

/* Pantallas muy grandes (1200px+) */
@media (min-width: 1200px) {
    .container {
        max-width: 1000px;
        padding: 4rem 3rem;
    }
    
    h1 {
        font-size: 3rem;
    }
    
    .instructions {
        padding: 2rem;
    }
    
    button, .download-button {
        padding: 1.25rem 2.5rem;
        font-size: 1.1rem;
    }
}

/* Pantallas grandes (992px - 1199px) */
@media (max-width: 1199px) and (min-width: 992px) {
    .container {
        max-width: 950px;
        padding: 3.5rem 2.5rem;
    }
    
    h1 {
        font-size: 2.75rem;
    }
}

/* Tablets y pantallas medianas (768px - 991px) */
@media (max-width: 991px) and (min-width: 768px) {
    body {
        padding: 15px;
    }
    
    .container {
        padding: 2.5rem 2rem;
        max-width: 800px;
    }
    
    h1 {
        font-size: 2.25rem;
    }
    
    .instructions {
        padding: 1.25rem;
    }
    
    button, .download-button {
        padding: 0.875rem 1.75rem;
        font-size: 0.95rem;
    }
}

/* Tablets pequeñas y móviles grandes (481px - 767px) */
@media (max-width: 767px) and (min-width: 481px) {
    body {
        padding: 10px;
        align-items: flex-start;
        padding-top: 20px;
    }
    
    .container {
        padding: 2rem 1.5rem;
        margin: 0 auto;
        min-height: auto;
    }
    
    h1 {
        font-size: 2rem;
        margin-bottom: 1.5rem;
    }
    
    h1::after {
        width: 50px;
        height: 2px;
    }
    
    .instructions {
        padding: 1.25rem;
        margin-bottom: 1.5rem;
    }
    
    .instructions::before {
        font-size: 1rem;
        padding: 4px 8px;
    }
    
    .input-group {
        margin-bottom: 1.25rem;
    }
    
    button, .download-button {
        padding: 0.875rem 1.5rem;
        font-size: 0.9rem;
    }
    
    input[type="file"] {
        padding: 0.875rem;
        font-size: 0.9rem;
    }
    
    .footer {
        margin-top: 1.5rem;
        padding-top: 1.5rem;
        font-size: 0.85rem;
    }
}

/* Móviles medianos (375px - 480px) */
@media (max-width: 480px) and (min-width: 376px) {
    body {
        padding: 8px;
        align-items: flex-start;
        padding-top: 15px;
    }
    
    .container {
        padding: 1.75rem 1.25rem;
        border-radius: 10px;
    }
    
    h1 {
        font-size: 1.75rem;
        margin-bottom: 1.25rem;
    }
    
    .instructions {
        padding: 1rem;
        margin-bottom: 1.25rem;
    }
    
    .instructions ul {
        padding-left: 1.25rem;
    }
    
    .instructions li {
        font-size: 0.9rem;
        margin-bottom: 0.4rem;
    }
    
    button, .download-button {
        padding: 0.75rem 1.25rem;
        font-size: 0.85rem;
        letter-spacing: 0.3px;
    }
    
    input[type="file"] {
        padding: 0.75rem;
        font-size: 0.85rem;
    }
    
    .footer {
        margin-top: 1.25rem;
        padding-top: 1.25rem;
        font-size: 0.8rem;
    }
}

/* Móviles pequeños (320px - 375px) */
@media (max-width: 375px) and (min-width: 321px) {
    body {
        padding: 5px;
        align-items: flex-start;
        padding-top: 10px;
    }
    
    .container {
        padding: 1.5rem 1rem;
        border-radius: 8px;
    }
    
    h1 {
        font-size: 1.5rem;
        margin-bottom: 1rem;
        letter-spacing: -0.3px;
    }
    
    h1::after {
        width: 40px;
        height: 2px;
    }
    
    .instructions {
        padding: 0.875rem;
        margin-bottom: 1rem;
    }
    
    .instructions::before {
        font-size: 0.9rem;
        padding: 3px 6px;
        left: 15px;
    }
    
    .instructions p {
        font-size: 0.85rem;
        margin-bottom: 0.75rem;
    }
    
    .instructions ul {
        padding-left: 1rem;
        margin: 0.75rem 0;
    }
    
    .instructions li {
        font-size: 0.8rem;
        margin-bottom: 0.3rem;
    }
    
    .input-group {
        margin-bottom: 1rem;
    }
    
    button, .download-button {
        padding: 0.625rem 1rem;
        font-size: 0.8rem;
        letter-spacing: 0.2px;
    }
    
    input[type="file"] {
        padding: 0.625rem;
        font-size: 0.8rem;
    }
    
    .footer {
        margin-top: 1rem;
        padding-top: 1rem;
        font-size: 0.75rem;
    }
}

/* Móviles muy pequeños (menos de 320px) */
@media (max-width: 320px) {
    body {
        padding: 3px;
        align-items: flex-start;
        padding-top: 8px;
    }
    
    .container {
        padding: 1.25rem 0.75rem;
        border-radius: 6px;
    }
    
    h1 {
        font-size: 1.25rem;
        margin-bottom: 0.875rem;
        letter-spacing: -0.2px;
    }
    
    h1::after {
        width: 35px;
        height: 2px;
    }
    
    .instructions {
        padding: 0.75rem;
        margin-bottom: 0.875rem;
    }
    
    .instructions::before {
        font-size: 0.8rem;
        padding: 2px 5px;
        left: 10px;
        top: -8px;
    }
    
    .instructions p {
        font-size: 0.8rem;
        margin-bottom: 0.625rem;
    }
    
    .instructions ul {
        padding-left: 0.875rem;
        margin: 0.625rem 0;
    }
    
    .instructions li {
        font-size: 0.75rem;
        margin-bottom: 0.25rem;
    }
    
    .input-group {
        margin-bottom: 0.875rem;
    }
    
    button, .download-button {
        padding: 0.5rem 0.875rem;
        font-size: 0.75rem;
        letter-spacing: 0.1px;
    }
    
    input[type="file"] {
        padding: 0.5rem;
        font-size: 0.75rem;
    }
    
    .footer {
        margin-top: 0.875rem;
        padding-top: 0.875rem;
        font-size: 0.7rem;
    }
}

/* Orientación landscape en móviles */
@media (max-height: 500px) and (orientation: landscape) {
    body {
        align-items: flex-start;
        padding: 10px;
    }
    
    .container {
        padding: 1.5rem 2rem;
        margin: 0 auto;
    }
    
    h1 {
        font-size: 1.75rem;
        margin-bottom: 1rem;
    }
    
    .instructions {
        padding: 1rem;
        margin-bottom: 1rem;
    }
    
    .input-group {
        margin-bottom: 1rem;
    }
    
    button, .download-button {
        padding: 0.75rem 1.5rem;
        font-size: 0.85rem;
    }
    
    .footer {
        margin-top: 1rem;
        padding-top: 1rem;
    }
}

/* Animaciones de entrada */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.container {
    animation: fadeInUp 0.6s ease-out;
}

.input-group {
    animation: fadeInUp 0.6s ease-out;
    animation-fill-mode: both;
}

.input-group:nth-child(1) { animation-delay: 0.1s; }
.input-group:nth-child(2) { animation-delay: 0.2s; }
.input-group:nth-child(3) { animation-delay: 0.3s; }
.input-group:nth-child(4) { animation-delay: 0.4s; }
.input-group:nth-child(5) { animation-delay: 0.5s; }
.input-group:nth-child(6) { animation-delay: 0.6s; }

/* Estados de carga */
.loading {
    position: relative;
    pointer-events: none;
}

.loading::after {
    content: '';
    position: absolute;
    top: 50%;
    left: 50%;
    width: 20px;
    height: 20px;
    margin: -10px 0 0 -10px;
    border: 2px solid transparent;
    border-top: 2px solid var(--white);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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