/* ============================================
   DOVE AI SKIN DIAGNOSIS - BANNER 300×600
   Estilos principales + Overlay de error + Botón reintentar
   ============================================ */

/* ============================================
   VARIABLES CSS - PALETA DOVE
   ============================================ */
:root {
    --dove-white: #FFFFFF;
    --dove-blue: #00497E;
    --dove-blue-hover: #003a65;
    --dove-gray: #F0F0F0;
    --dove-gray-dark: #E0E0E0;
    --text-dark: #333333;
    --text-light: #666666;
    --text-muted: #999999;
    --error-red: #c0392b;
    --error-red-light: #fdeaea;
}

/* ============================================
   RESET Y BASE
   ============================================ */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: 'Outfit', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
    background: transparent;
    margin: 0;
    padding: 0;
    min-height: 100vh;
    display: flex;
    justify-content: center;
    align-items: center;
}

/* ============================================
   CONTENEDOR PRINCIPAL DEL BANNER
   ============================================ */
.banner-container {
    width: 300px;
    height: 600px;
    position: relative;
    overflow: hidden;
    background: var(--dove-white);
    border-radius: 12px;
    box-shadow: 
        0 25px 50px -12px rgba(0, 0, 0, 0.4),
        0 0 0 1px rgba(255, 255, 255, 0.1);
}

/* ============================================
   ESTADOS - SISTEMA DE TRANSICIONES
   ============================================ */
.state {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.5s ease, visibility 0.5s ease;
    display: flex;
    flex-direction: column;
}

.state.active {
    opacity: 1;
    visibility: visible;
}

/* ============================================
   ESTADO 1: INTRO CON VIDEO
   ============================================ */
.state-intro {
    background: #000;
}

.video-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.video-placeholder {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(
        180deg,
        #f8e1d4 0%,
        #f5d4c6 30%,
        #e8c4b8 60%,
        #d4a99a 100%
    );
    display: flex;
    align-items: center;
    justify-content: center;
}

.video-placeholder::before {
    content: '';
    position: absolute;
    width: 120px;
    height: 120px;
    background: radial-gradient(circle, rgba(255,255,255,0.4) 0%, transparent 70%);
    border-radius: 50%;
    animation: pulse 3s ease-in-out infinite;
}

@keyframes pulse {
    0%, 100% { transform: scale(1); opacity: 0.5; }
    50% { transform: scale(1.3); opacity: 0.8; }
}

.intro-overlay {
    position: absolute;
    bottom: 0;
    left: 0;
    width: 100%;
    height: 70%;
    background: linear-gradient(
        to top,
        rgba(0, 0, 0, 0.85) 0%,
        rgba(0, 0, 0, 0.5) 40%,
        transparent 100%
    );
    pointer-events: none;
}

.intro-content {
    position: relative;
    z-index: 2;
    flex: 1;
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 24px;
    text-align: center;
}

.intro-tagline {
    color: var(--dove-white);
    font-size: 26px;
    font-weight: 300;
    line-height: 1.3;
    margin-bottom: 24px;
    text-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

.intro-tagline strong {
    font-weight: 600;
}

.btn-primary {
    background: var(--dove-blue);
    color: var(--dove-white);
    border: none;
    padding: 16px 28px;
    font-size: 15px;
    font-weight: 600;
    font-family: inherit;
    border-radius: 50px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 73, 126, 0.4);
    text-transform: none;
    letter-spacing: 0.3px;
}

.btn-primary:hover {
    background: var(--dove-blue-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(0, 73, 126, 0.5);
}

.btn-primary:active {
    transform: translateY(0);
}

.intro-footer {
    position: relative;
    z-index: 2;
    padding: 16px;
    text-align: center;
}

.powered-by {
    color: rgba(255, 255, 255, 0.6);
    font-size: 11px;
    font-weight: 400;
    letter-spacing: 0.5px;
}

/* ============================================
   ESTADO 2: INTERACCIÓN / APP
   ============================================ */
.state-app {
    background: var(--dove-white);
}

.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 20px;
    border-bottom: 1px solid var(--dove-gray);
}

.dove-logo {
    font-size: 24px;
    font-weight: 700;
    color: var(--dove-blue);
    letter-spacing: -0.5px;
}

.dove-logo span {
    font-weight: 300;
}

.btn-close {
    width: 32px;
    height: 32px;
    border: none;
    background: var(--dove-gray);
    color: var(--text-light);
    font-size: 18px;
    font-weight: 300;
    border-radius: 50%;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    font-family: inherit;
}

.btn-close:hover {
    background: var(--dove-gray-dark);
    color: var(--text-dark);
}

.app-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 24px;
    gap: 20px;
}

.app-title {
    font-size: 22px;
    font-weight: 600;
    color: var(--text-dark);
    text-align: center;
}

.app-subtitle {
    font-size: 14px;
    color: var(--text-light);
    text-align: center;
    line-height: 1.5;
}

.action-buttons {
    display: flex;
    flex-direction: column;
    gap: 12px;
    width: 100%;
    margin-top: 8px;
}

.btn-action {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 12px;
    padding: 18px 24px;
    border-radius: 16px;
    font-size: 15px;
    font-weight: 600;
    font-family: inherit;
    cursor: pointer;
    transition: all 0.3s ease;
    border: none;
}

.btn-action-primary {
    background: var(--dove-blue);
    color: var(--dove-white);
    box-shadow: 0 4px 12px rgba(0, 73, 126, 0.3);
}

.btn-action-primary:hover {
    background: var(--dove-blue-hover);
    transform: translateY(-2px);
    box-shadow: 0 6px 16px rgba(0, 73, 126, 0.4);
}

.btn-action-secondary {
    background: var(--dove-gray);
    color: var(--text-dark);
    border: 2px solid var(--dove-gray-dark);
}

.btn-action-secondary:hover {
    background: var(--dove-gray-dark);
    border-color: #ccc;
}

.btn-icon {
    font-size: 20px;
}

.separator {
    display: flex;
    align-items: center;
    gap: 16px;
    width: 100%;
    color: var(--text-muted);
    font-size: 13px;
    font-weight: 500;
}

.separator::before,
.separator::after {
    content: '';
    flex: 1;
    height: 1px;
    background: var(--dove-gray-dark);
}

.app-footer {
    padding: 16px 24px;
    text-align: center;
    border-top: 1px solid var(--dove-gray);
}

.legal-text {
    font-size: 10px;
    color: var(--text-muted);
    line-height: 1.5;
}

/* ============================================
   OVERLAY DE ESCANEO
   ============================================ */
.scanning-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 73, 126, 0.95);
    opacity: 0;
    visibility: hidden;
    transition: all 0.4s ease;
    z-index: 10;
    overflow: hidden;
}

.scanning-overlay.active {
    opacity: 1;
    visibility: visible;
}

.overlay-content {
    position: relative;
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.analysis-background {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    object-fit: cover;
    filter: blur(8px) brightness(0.4);
    z-index: 1;
}

.analysis-container {
    position: relative;
    z-index: 2;
    text-align: center;
    padding: 30px 20px;
    width: 100%;
}

.scan-box {
    width: 220px;
    height: 220px;
    margin: 0 auto 25px;
    border: 3px solid rgba(0, 162, 221, 0.6);
    border-radius: 12px;
    position: relative;
    overflow: hidden;
    box-shadow: 0 0 30px rgba(0, 162, 221, 0.3);
}

.scan-lines {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
}

.scan-line {
    position: absolute;
    width: 100%;
    height: 3px;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(0, 162, 221, 0.8),
        rgba(255, 255, 255, 0.9),
        rgba(0, 162, 221, 0.8),
        transparent
    );
    box-shadow: 0 0 10px rgba(0, 162, 221, 0.8);
    animation: scanMove 2s linear infinite;
}

@keyframes scanMove {
    0% { top: -10%; opacity: 0; }
    10% { opacity: 1; }
    90% { opacity: 1; }
    100% { top: 110%; opacity: 0; }
}

.scan-corner {
    position: absolute;
    width: 20px;
    height: 20px;
    border: 3px solid #00a2dd;
}

.scan-corner.top-left { top: -3px; left: -3px; border-right: none; border-bottom: none; }
.scan-corner.top-right { top: -3px; right: -3px; border-left: none; border-bottom: none; }
.scan-corner.bottom-left { bottom: -3px; left: -3px; border-right: none; border-top: none; }
.scan-corner.bottom-right { bottom: -3px; right: -3px; border-left: none; border-top: none; }

.scan-text {
    font-size: 15px;
    font-weight: 600;
    color: #00a2dd;
    margin-top: 15px;
    text-shadow: 0 0 10px rgba(0, 162, 221, 0.5);
    animation: pulseText 1.5s ease-in-out infinite;
}

@keyframes pulseText {
    0%, 100% { opacity: 0.7; }
    50% { opacity: 1; }
}

.progress-container {
    width: 100%;
    max-width: 260px;
    margin: 0 auto;
}

.progress-bar {
    width: 100%;
    height: 10px;
    background: rgba(255, 255, 255, 0.15);
    border-radius: 10px;
    overflow: hidden;
    margin: 20px 0;
    box-shadow: inset 0 2px 4px rgba(0, 0, 0, 0.2);
}

.progress-fill {
    width: 0%;
    height: 100%;
    background: linear-gradient(90deg, #00a2dd, #0084ff, #00a2dd);
    background-size: 200% 100%;
    border-radius: 10px;
    transition: width 3s cubic-bezier(0.4, 0, 0.2, 1);
    animation: shimmer 2s linear infinite;
    box-shadow: 0 0 10px rgba(0, 162, 221, 0.5);
}

@keyframes shimmer {
    0% { background-position: 200% 0; }
    100% { background-position: -200% 0; }
}

.progress-percentage {
    font-size: 24px;
    font-weight: 700;
    color: white;
    margin: 10px 0;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
}

.analysis-message {
    font-size: 14px;
    font-weight: 600;
    color: white;
    margin: 20px 0;
    min-height: 45px;
    line-height: 1.4;
    text-shadow: 0 2px 4px rgba(0, 0, 0, 0.3);
    animation: messageFade 0.8s ease-in-out;
}

@keyframes messageFade {
    0% { opacity: 0; transform: translateY(10px); }
    100% { opacity: 1; transform: translateY(0); }
}

.analysis-metrics {
    display: flex;
    justify-content: center;
    gap: 12px;
    margin-top: 25px;
    flex-wrap: wrap;
}

.metric {
    font-size: 11px;
    color: white;
    background: rgba(0, 162, 221, 0.25);
    backdrop-filter: blur(10px);
    padding: 6px 14px;
    border-radius: 20px;
    font-weight: 600;
    border: 1px solid rgba(0, 162, 221, 0.4);
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.2);
}

.fade-in {
    animation: fadeIn 0.5s ease-in-out;
}

@keyframes fadeIn {
    from { opacity: 0; transform: scale(0.95); }
    to { opacity: 1; transform: scale(1); }
}

/* ============================================
   ESTADO 3: RESULTADOS
   ============================================ */
.state-results {
    background: var(--dove-white);
}

.results-header {
    background: linear-gradient(135deg, var(--dove-blue) 0%, #005a96 100%);
    padding: 20px;
    text-align: center;
}

.results-header h2 {
    color: var(--dove-white);
    font-size: 18px;
    font-weight: 600;
}

.results-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    padding: 24px;
    gap: 20px;
}

.diagnosis-card {
    background: linear-gradient(135deg, #e8f4f8 0%, #f0f8ff 100%);
    border-radius: 16px;
    padding: 24px;
    text-align: center;
    border: 1px solid rgba(0, 73, 126, 0.1);
}

.diagnosis-icon {
    font-size: 48px;
    margin-bottom: 12px;
    animation: droplet 2s ease-in-out infinite;
}

@keyframes droplet {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

.diagnosis-title {
    font-size: 13px;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 1px;
    margin-bottom: 8px;
    font-weight: 500;
}

.diagnosis-result {
    font-size: 18px;
    font-weight: 600;
    color: var(--dove-blue);
    line-height: 1.4;
}

.product-card {
    background: var(--dove-gray);
    border-radius: 16px;
    padding: 20px;
    display: flex;
    align-items: center;
    gap: 16px;
}

.product-image {
    width: 80px;
    height: 100px;
    background: var(--dove-white);
    border-radius: 12px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 10px;
    color: var(--text-muted);
    text-align: center;
    padding: 8px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.08);
}

.product-info {
    flex: 1;
}

.product-badge {
    display: inline-block;
    background: var(--dove-blue);
    color: var(--dove-white);
    font-size: 9px;
    font-weight: 600;
    padding: 4px 10px;
    border-radius: 20px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.product-name {
    font-size: 16px;
    font-weight: 600;
    color: var(--text-dark);
    margin-bottom: 4px;
}

.product-description {
    font-size: 12px;
    color: var(--text-light);
    line-height: 1.4;
}

.results-cta {
    padding: 0 24px 24px;
}

.btn-buy {
    width: 100%;
    background: linear-gradient(135deg, var(--dove-blue) 0%, #005a96 100%);
    color: var(--dove-white);
    border: none;
    padding: 18px;
    font-size: 14px;
    font-weight: 700;
    font-family: inherit;
    border-radius: 14px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 1.5px;
    box-shadow: 0 6px 20px rgba(0, 73, 126, 0.4);
}

.btn-buy:hover {
    transform: translateY(-2px);
    box-shadow: 0 8px 25px rgba(0, 73, 126, 0.5);
}

.btn-buy:active {
    transform: translateY(0);
}

.restart-link {
    display: block;
    text-align: center;
    margin-top: 12px;
    color: var(--text-muted);
    font-size: 12px;
    text-decoration: none;
    cursor: pointer;
    transition: color 0.2s ease;
}

.restart-link:hover {
    color: var(--dove-blue);
}

/* ============================================
   OVERLAY DE ERROR + BOTÓN REINTENTAR
   ============================================ */
.error-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 73, 126, 0.97);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 20;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s ease, visibility 0.4s ease;
}

.error-overlay.active {
    opacity: 1;
    visibility: visible;
}

.error-overlay-content {
    background: var(--dove-white);
    border-radius: 16px;
    padding: 28px 24px;
    margin: 20px;
    max-width: 260px;
    text-align: center;
    box-shadow: 0 10px 40px rgba(0, 0, 0, 0.3);
}

.error-overlay-icon {
    font-size: 40px;
    margin-bottom: 16px;
}

.error-overlay-title {
    font-size: 16px;
    font-weight: 700;
    color: var(--text-dark);
    margin-bottom: 12px;
}

.error-overlay-message {
    font-size: 13px;
    color: var(--text-light);
    line-height: 1.5;
    margin-bottom: 20px;
}

.error-overlay-technical {
    font-size: 10px;
    color: var(--text-muted);
    background: var(--error-red-light);
    padding: 8px 12px;
    border-radius: 8px;
    margin-bottom: 20px;
    text-align: left;
    word-break: break-all;
}

.btn-retry {
    width: 100%;
    background: var(--dove-blue);
    color: var(--dove-white);
    border: none;
    padding: 14px 24px;
    font-size: 14px;
    font-weight: 600;
    font-family: inherit;
    border-radius: 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.btn-retry:hover {
    background: var(--dove-blue-hover);
    transform: translateY(-2px);
}

.btn-retry:active {
    transform: translateY(0);
}

/* ============================================
   VIDEO CAPTURE (getUserMedia) - Desktop
   ============================================ */
.video-capture-overlay {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.9);
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    z-index: 15;
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.4s ease, visibility 0.4s ease;
}

.video-capture-overlay.active {
    opacity: 1;
    visibility: visible;
}

.video-capture-preview {
    width: 260px;
    height: 260px;
    object-fit: cover;
    border-radius: 12px;
    border: 3px solid var(--dove-blue);
    margin-bottom: 20px;
}

.video-capture-buttons {
    display: flex;
    gap: 12px;
}

.video-capture-buttons .btn-action {
    padding: 14px 20px;
}

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-height: 580px) {
    .intro-tagline { font-size: 22px; }
    .app-title { font-size: 20px; }
}