/* Reset y Variables CSS */
:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --success-color: #10b981;
    --error-color: #ef4444;
    --warning-color: #f59e0b;
    --text-primary: #1f2937;
    --text-secondary: #6b7280;
    --border-color: #d1d5db;
    --bg-color: #f9fafb;
    --white: #ffffff;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --transition: all 0.3s ease;
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
    padding: 20px;
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

.form-wrapper {
    background: var(--white);
    border-radius: 16px;
    box-shadow: var(--shadow-lg);
    padding: 40px;
    animation: fadeIn 0.5s ease-in;
}

@keyframes fadeIn {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.form-header {
    text-align: center;
    margin-bottom: 32px;
}

.form-header h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.form-header p {
    color: var(--text-secondary);
    font-size: 1rem;
}

/* Grupos de Formulario */
.form-group {
    margin-bottom: 24px;
}

.form-row {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
}

.form-group-half {
    margin-bottom: 0;
}

label {
    display: block;
    font-weight: 600;
    font-size: 0.875rem;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.required {
    color: var(--error-color);
    margin-left: 2px;
}

/* Inputs y Selects */
input[type="text"],
input[type="email"],
input[type="tel"],
select,
textarea {
    width: 100%;
    padding: 12px 16px;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    font-size: 1rem;
    font-family: inherit;
    transition: var(--transition);
    background-color: var(--white);
    color: var(--text-primary);
}

input[type="text"]:focus,
input[type="email"]:focus,
input[type="tel"]:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

input[type="text"]:invalid:not(:placeholder-shown),
input[type="email"]:invalid:not(:placeholder-shown),
input[type="tel"]:invalid:not(:placeholder-shown),
select:invalid:not(:placeholder-shown),
textarea:invalid:not(:placeholder-shown) {
    border-color: var(--error-color);
}

input[type="text"]:valid:not(:placeholder-shown),
input[type="email"]:valid:not(:placeholder-shown),
input[type="tel"]:valid:not(:placeholder-shown),
select:valid:not(:placeholder-shown),
textarea:valid:not(:placeholder-shown) {
    border-color: var(--success-color);
}

select {
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23374151' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 16px center;
    padding-right: 40px;
}

textarea {
    resize: vertical;
    min-height: 120px;
}

.char-counter {
    display: block;
    text-align: right;
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 4px;
}

/* Checkbox */
.checkbox-group {
    margin-bottom: 24px;
}

.checkbox-label {
    display: flex;
    align-items: flex-start;
    cursor: pointer;
    font-weight: normal;
}

.checkbox-label input[type="checkbox"] {
    width: auto;
    margin-right: 12px;
    margin-top: 4px;
    cursor: pointer;
    width: 20px;
    height: 20px;
    accent-color: var(--primary-color);
}

.checkbox-text {
    font-size: 0.875rem;
    color: var(--text-primary);
    line-height: 1.5;
}

.checkbox-text a {
    color: var(--primary-color);
    text-decoration: none;
    font-weight: 600;
}

.checkbox-text a:hover {
    text-decoration: underline;
}

/* Honeypot (oculto) */
.honeypot {
    position: absolute;
    left: -9999px;
    opacity: 0;
    pointer-events: none;
}

/* Mensajes de Error */
.error-message {
    display: block;
    color: var(--error-color);
    font-size: 0.75rem;
    margin-top: 4px;
    min-height: 18px;
}

/* Botón de Envío */
.submit-btn {
    width: 100%;
    padding: 14px 24px;
    background-color: var(--primary-color);
    color: var(--white);
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    position: relative;
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 48px;
}

.submit-btn:hover:not(:disabled) {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.submit-btn:active:not(:disabled) {
    transform: translateY(0);
}

.submit-btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-loader {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(255, 255, 255, 0.3);
    border-top-color: var(--white);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Mensajes del Formulario */
.form-message {
    margin-top: 20px;
    padding: 16px;
    border-radius: 8px;
    font-size: 0.875rem;
    font-weight: 500;
    text-align: center;
    animation: slideDown 0.3s ease-out;
}

@keyframes slideDown {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.form-message.success {
    background-color: #d1fae5;
    color: #065f46;
    border: 1px solid var(--success-color);
}

.form-message.error {
    background-color: #fee2e2;
    color: #991b1b;
    border: 1px solid var(--error-color);
}

/* Responsive Design */
@media (max-width: 768px) {
    .container {
        padding: 10px;
    }

    .form-wrapper {
        padding: 24px;
    }

    .form-header h1 {
        font-size: 1.5rem;
    }

    .form-row {
        grid-template-columns: 1fr;
        gap: 0;
    }

    .form-group-half {
        margin-bottom: 24px;
    }
}

@media (max-width: 480px) {
    body {
        padding: 10px;
    }

    .form-wrapper {
        padding: 20px;
    }

    .form-header h1 {
        font-size: 1.25rem;
    }
}

/* Accesibilidad */
@media (prefers-reduced-motion: reduce) {
    * {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
    }
}

/* Focus visible para accesibilidad */
input:focus-visible,
select:focus-visible,
textarea:focus-visible,
button:focus-visible {
    outline: 2px solid var(--primary-color);
    outline-offset: 2px;
}