/* index.css */

:root {
    --bg-main: #0a0e17;
    --card-bg: rgba(18, 26, 41, 0.85);
    --card-border: rgba(56, 189, 248, 0.2);
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --accent-blue: #38bdf8;
    --accent-blue-hover: #0284c7;
    
    /* Estados */
    --status-standby-bg: rgba(30, 41, 59, 0.7);
    --status-standby-border: rgba(148, 163, 184, 0.2);
    --status-standby-text: #cbd5e1;

    --status-success-bg: rgba(6, 78, 59, 0.6);
    --status-success-border: #10b981;
    --status-success-text: #6ee7b7;

    --status-error-bg: rgba(127, 29, 29, 0.6);
    --status-error-border: #ef4444;
    --status-error-text: #fca5a5;
}

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

/*
body {
    font-family: 'Segoe UI', Roboto, -apple-system, BlinkMacSystemFont, sans-serif;
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 100vh;
    margin: 0;

     Configuración de la imagen de fondo 
    background-image: url('./images/nfc_002.png');
    background-size: cover;        Escala la imagen para cubrir el 100% de la pantalla 
    background-position: center;   Centra la imagen en el viewport 
    background-repeat: no-repeat;  Evita que la imagen se repita 
    background-attachment: fixed;  Mantiene el fondo fijo al hacer scroll 

    color: var(--text-primary);
}
*/ 

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

    /* Fondo en formato AVIF con capa de contraste */
    background: 
        linear-gradient(rgba(10, 14, 23, 0.75), rgba(10, 14, 23, 0.75)),
        url('./images/nfc_002.avif') no-repeat center center fixed;
    background-size: cover;

    color: var(--text-primary);
}


.card-container {
    position: relative;
    background: var(--card-bg);
    backdrop-filter: blur(12px);
    border: 1px solid var(--card-border);
    padding: 2.5rem 2rem;
    border-radius: 16px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.5), inset 0 1px 0 rgba(255, 255, 255, 0.1);
    text-align: center;
    width: 380px;
    max-width: 90%;
    overflow: hidden;
}

/* Gráfico técnico de tarjeta NFC / RFID en marca de agua */
.card-container::before {
    content: "";
    position: absolute;
    top: -30px;
    right: -30px;
    width: 180px;
    height: 180px;
    /* Icono técnico SVG vectorial de tarjeta con señal en marca de agua */
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='rgba(56, 189, 248, 0.08)' stroke-width='1.2' stroke-linecap='round' stroke-linejoin='round'%3E%3Crect x='2' y='5' width='20' height='14' rx='2'/%3E%3Cline x1='2' y1='10' x2='22' y2='10'/%3E%3Cpath d='M16 14h2'/%3E%3Cpath d='M6 14a2 2 0 0 1 2-2'/%3E%3Cpath d='M6 17a5 5 0 0 1 5-5'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-size: contain;
    pointer-events: none;
    z-index: 0;
}

.header-icon {
    width: 54px;
    height: 54px;
    margin: 0 auto 1rem auto;
    background: rgba(56, 189, 248, 0.1);
    border: 1px solid rgba(56, 189, 248, 0.3);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--accent-blue);
    box-shadow: 0 0 15px rgba(56, 189, 248, 0.2);
}

.header-icon svg {
    width: 28px;
    height: 28px;
    fill: none;
    stroke: currentColor;
    stroke-width: 2;
    stroke-linecap: round;
    stroke-linejoin: round;
}

h2 {
    font-size: 1.4rem;
    font-weight: 600;
    letter-spacing: 0.5px;
    color: var(--text-primary);
    margin-bottom: 0.3rem;
}

.subtitle {
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-bottom: 1.5rem;
    text-transform: uppercase;
    letter-spacing: 1px;
}

/* Caja de Estado / Respuesta */
.display-box {
    position: relative;
    z-index: 1;
    margin-top: 1rem;
    padding: 1.25rem 1rem;
    border-radius: 10px;
    font-size: 1.05rem;
    font-weight: 500;
    min-height: 60px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    word-break: break-word;
}

/* Colores según estado */
.standby { 
    background-color: var(--status-standby-bg); 
    border: 1px dashed var(--status-standby-border);
    color: var(--status-standby-text); 
}

.success { 
    background-color: var(--status-success-bg); 
    border: 1px solid var(--status-success-border);
    color: var(--status-success-text); 
    box-shadow: 0 0 15px rgba(16, 185, 129, 0.2);
}

.error { 
    background-color: var(--status-error-bg); 
    border: 1px solid var(--status-error-border);
    color: var(--status-error-text); 
    box-shadow: 0 0 15px rgba(239, 68, 68, 0.2);
}

/* Input RFID capturador invisible */
#rfid_input {
    position: absolute;
    opacity: 0;
    top: -1000px;
}

/* Formulario de emergencia manual */
.manual-input-box {
    position: relative;
    z-index: 1;
    margin-top: 1.8rem;
    padding-top: 1.2rem;
    border-top: 1px solid rgba(255, 255, 255, 0.08);
    display: flex;
    gap: 8px;
    justify-content: center;
}

.manual-input-box input {
    background: rgba(15, 23, 42, 0.6);
    border: 1px solid rgba(148, 163, 184, 0.2);
    color: var(--text-primary);
    padding: 10px 14px;
    border-radius: 8px;
    font-size: 0.85rem;
    outline: none;
    width: 100%;
    transition: all 0.2s ease;
}

.manual-input-box input::placeholder {
    color: #64748b;
}

.manual-input-box input:focus {
    border-color: var(--accent-blue);
    box-shadow: 0 0 0 3px rgba(56, 189, 248, 0.15);
}

.manual-input-box button {
    padding: 10px 16px;
    background-color: rgba(56, 189, 248, 0.15);
    color: var(--accent-blue);
    border: 1px solid rgba(56, 189, 248, 0.4);
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    white-space: nowrap;
}

.manual-input-box button:hover {
    background-color: var(--accent-blue);
    color: #0f172a;
    box-shadow: 0 0 10px rgba(56, 189, 248, 0.4);
}