/* Estilos iOS 18 para el sistema de encuestas */

:root {
    --ios-blue: #007AFF;
    --ios-gray: #8E8E93;
    --ios-light-gray: #F2F2F7;
    --ios-white: #FFFFFF;
    --ios-black: #000000;
    --ios-green: #34C759;
    --ios-card-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    --ios-radius: 12px;
    --ios-font: -apple-system, BlinkMacSystemFont, "SF Pro Display", "Segoe UI", Roboto, sans-serif;
}

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

body.survey-active {
    background-color: var(--ios-light-gray);
    font-family: var(--ios-font);
}

.survey-container {
    max-width: 100%;
    min-height: 100vh;
    background-color: var(--ios-light-gray);
    padding: 20px;
    display: flex;
    flex-direction: column;
}

.survey-progress-bar {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background-color: rgba(0, 122, 255, 0.1);
    z-index: 1000;
}

.survey-progress-fill {
    height: 100%;
    background-color: var(--ios-blue);
    transition: width 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
}

.survey-progress-text {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    font-size: 13px;
    font-weight: 600;
    color: var(--ios-gray);
    letter-spacing: -0.08px;
    z-index: 999;
}

.survey-content {
    max-width: 680px;
    margin: 80px auto 120px;
    flex: 1;
}

.survey-screen {
    display: none;
    animation: fadeIn 0.4s ease-in-out;
}

.survey-screen.active {
    display: block;
}

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

.survey-intro,
.survey-outro {
    text-align: center;
    padding: 40px 20px;
}

.survey-intro h1,
.survey-outro h1 {
    font-size: 32px;
    font-weight: 700;
    color: var(--ios-black);
    margin-bottom: 16px;
    letter-spacing: -0.5px;
    line-height: 1.2;
}

.survey-intro p,
.survey-outro p {
    font-size: 17px;
    color: var(--ios-gray);
    line-height: 1.5;
    margin-bottom: 32px;
}

.survey-question-container {
    background: var(--ios-white);
    border-radius: var(--ios-radius);
    padding: 32px 24px;
    box-shadow: var(--ios-card-shadow);
    margin-bottom: 20px;
}

.survey-question-text {
    font-size: 22px;
    font-weight: 600;
    color: var(--ios-black);
    margin-bottom: 24px;
    letter-spacing: -0.3px;
    line-height: 1.3;
}

/* Input de texto corto */
.survey-input-short {
    width: 100%;
    padding: 14px 16px;
    font-size: 17px;
    border: 1px solid #D1D1D6;
    border-radius: 10px;
    background-color: var(--ios-white);
    transition: all 0.2s ease;
    font-family: var(--ios-font);
}

.survey-input-short:focus {
    outline: none;
    border-color: var(--ios-blue);
    box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.1);
}

/* Textarea */
.survey-textarea {
    width: 100%;
    min-height: 120px;
    padding: 14px 16px;
    font-size: 17px;
    border: 1px solid #D1D1D6;
    border-radius: 10px;
    background-color: var(--ios-white);
    resize: vertical;
    font-family: var(--ios-font);
    line-height: 1.4;
    transition: all 0.2s ease;
}

.survey-textarea:focus {
    outline: none;
    border-color: var(--ios-blue);
    box-shadow: 0 0 0 4px rgba(0, 122, 255, 0.1);
}

/* Botones Si/No */
.survey-yesno-container {
    display: flex;
    gap: 12px;
}

.survey-yesno-button {
    flex: 1;
    padding: 16px;
    font-size: 17px;
    font-weight: 600;
    border: 2px solid #D1D1D6;
    border-radius: 10px;
    background-color: var(--ios-white);
    color: var(--ios-black);
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: var(--ios-font);
}

.survey-yesno-button:hover {
    border-color: var(--ios-blue);
    background-color: rgba(0, 122, 255, 0.05);
}

.survey-yesno-button.selected {
    background-color: var(--ios-blue);
    border-color: var(--ios-blue);
    color: var(--ios-white);
}

/* Tarjetas de selección única */
.survey-cards-container {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(140px, 1fr));
    gap: 12px;
    margin-bottom: 20px;
}

.survey-card {
    background: var(--ios-white);
    border: 2px solid #E5E5EA;
    border-radius: var(--ios-radius);
    padding: 20px 16px;
    cursor: pointer;
    transition: all 0.3s cubic-bezier(0.4, 0.0, 0.2, 1);
    display: flex;
    flex-direction: column;
    align-items: center;
    text-align: center;
    min-height: 120px;
    position: relative;
}

.survey-card:hover {
    border-color: var(--ios-blue);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 122, 255, 0.15);
}

.survey-card.selected {
    border-color: var(--ios-blue);
    background-color: rgba(0, 122, 255, 0.05);
    transform: scale(1.05);
}

.survey-card.selecting {
    animation: cardSelect 0.4s ease-in-out forwards;
}

@keyframes cardSelect {
    0% {
        transform: scale(1.05);
    }
    50% {
        transform: scale(1.1);
    }
    100% {
        transform: scale(1.05);
    }
}

.survey-card.hiding {
    animation: cardHide 0.3s ease-in-out forwards;
}

@keyframes cardHide {
    to {
        opacity: 0;
        transform: scale(0.9);
    }
}

.survey-card-icon {
    font-size: 32px;
    margin-bottom: 12px;
}

.survey-card-text {
    font-size: 15px;
    font-weight: 500;
    color: var(--ios-black);
    letter-spacing: -0.2px;
    line-height: 1.3;
}

/* Botones de navegación */
.survey-controls {
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    background: var(--ios-white);
    padding: 16px 20px;
    border-top: 1px solid #E5E5EA;
    display: flex;
    gap: 12px;
    z-index: 998;
}

.survey-button {
    flex: 1;
    padding: 14px 24px;
    font-size: 17px;
    font-weight: 600;
    border: none;
    border-radius: 10px;
    cursor: pointer;
    transition: all 0.2s ease;
    font-family: var(--ios-font);
}

.survey-button-back {
    background-color: var(--ios-light-gray);
    color: var(--ios-blue);
}

.survey-button-back:hover {
    background-color: #E5E5EA;
}

.survey-button-back:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.survey-button-next {
    background-color: var(--ios-blue);
    color: var(--ios-white);
}

.survey-button-next:hover {
    background-color: #0051D5;
}

.survey-button-next:disabled {
    opacity: 0.4;
    cursor: not-allowed;
}

.survey-button-start,
.survey-button-restart,
.survey-button-share {
    background-color: var(--ios-blue);
    color: var(--ios-white);
    width: 100%;
    margin-top: 12px;
}

.survey-button-start:hover,
.survey-button-restart:hover {
    background-color: #0051D5;
}

.survey-button-share {
    background-color: var(--ios-green);
    margin-top: 8px;
}

.survey-button-share:hover {
    background-color: #28A745;
}

/* Email input en pantalla final */
.survey-email-container {
    margin-top: 24px;
    text-align: left;
}

.survey-email-label {
    display: block;
    font-size: 15px;
    color: var(--ios-gray);
    margin-bottom: 8px;
}

/* Responsive móvil */
@media (max-width: 768px) {
    .survey-card {
        min-height: 100px;
        padding: 16px 12px;
    }
    
    .survey-card-icon {
        font-size: 28px;
        margin-bottom: 8px;
    }
    
    .survey-card-text {
        font-size: 14px;
    }
    
    .survey-intro h1,
    .survey-outro h1 {
        font-size: 28px;
    }
    
    .survey-intro p,
    .survey-outro p {
        font-size: 16px;
    }
}

/* Asegurar al menos 7 tarjetas visibles en móvil */
@media (max-width: 480px) {
    .survey-cards-container {
        max-height: 70vh;
        overflow-y: auto;
        -webkit-overflow-scrolling: touch;
        padding-bottom: 20px;
    }
    
    .survey-card {
        min-height: 90px;
    }
}

/* Loading state */
.survey-loading {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 60px;
}

.survey-spinner {
    width: 24px;
    height: 24px;
    border: 3px solid rgba(0, 122, 255, 0.2);
    border-top-color: var(--ios-blue);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}-content {
        margin: 70px auto 100px;
    }
    
    .survey-question-text {
        font-size: 20px;
    }
    
    .survey-cards-container {
        grid-template-columns: repeat(2, 1fr);
        gap: 10px;
    }
    
    .survey