:root {
    --crimson: #8a0314;
    --border-color: #ff4d6d;
    --text-light: #ffffff;
    --window-bg: rgba(15, 0, 5, 0.85);
}

body {
    margin: 0;
    padding: 0;
    background-image: url('A65F5B5F-61A3-4A1E-83CC-294A3FFF96ED1.png');
    background-size: cover;
    background-position: center;
    background-attachment: fixed;
    color: var(--text-light);
    font-family: 'Pixelify Sans', sans-serif;
    font-size: 22px;
    min-height: 100vh;
}

.main {
    max-width: 1200px;
    margin: 30px auto;
    padding: 0 15px;
}

#index-flex {
    display: flex;
    gap: 20px;
    align-items: flex-start;
}

.index-sidebar {
    width: 260px;
    flex-shrink: 0;
}

#index-body {
    flex-grow: 1;
    min-width: 300px;
}

.box-style {
    background-color: var(--window-bg);
    border: 2px solid var(--border-color);
    border-radius: 4px;
    margin-bottom: 20px;
    box-shadow: 0 0 15px rgba(0, 0, 0, 0.8);
    overflow: hidden;
    backdrop-filter: blur(4px);
}

.section-tab {
    background-color: var(--border-color);
    color: #fff;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 6px 10px;
}

.section-title {
    margin: 0;
    font-size: 16px;
    font-family: 'Pixelify Sans', sans-serif;
    font-weight: 700;
    text-shadow: 2px 2px 0px #000;
}

.section-buttons-display {
    display: flex;
    gap: 4px;
}

.section-buttons {
    background-color: transparent;
    border: 1px solid #fff;
    color: #fff;
    width: 20px;
    height: 20px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 14px;
    font-family: 'Pixelify Sans', sans-serif;
    font-weight: 700;
    cursor: default;
}

.close-btn {
    cursor: pointer;
}

.close-btn:hover {
    background-color: #fff;
    color: var(--crimson);
}

.content {
    padding: 20px;
}

#header {
    text-align: center;
    padding: 20px;
}

.title {
    margin: 0;
    color: #fff;
    font-family: 'Pixelify Sans', sans-serif;
    font-weight: 700;
    font-size: 48px;
    text-shadow: 4px 4px 0px var(--crimson);
    letter-spacing: 2px;
}

a {
    text-decoration: none;
}

.navigation-button {
    background: transparent;
    color: var(--border-color);
    display: block;
    width: 100%;
    text-align: left;
    padding: 10px 5px;
    font-family: 'Pixelify Sans', sans-serif;
    font-size: 24px;
    border-bottom: 2px dashed rgba(255, 77, 109, 0.4);
    transition: all 0.3s ease;
    box-sizing: border-box;
    cursor: pointer;
}

.navigation-button:hover {
    color: #fff;
    padding-left: 15px;
    background-color: rgba(255, 77, 109, 0.2);
}

.section-subtitle {
    margin-top: 5px;
    margin-bottom: 10px;
    font-size: 26px;
    color: #fff;
    border-bottom: 2px solid var(--border-color);
    padding-bottom: 5px;
    font-family: 'Pixelify Sans', sans-serif;
    font-weight: 700;
}

.greeting-title {
    color: var(--border-color);
    font-size: 36px;
    margin-top: 0;
    font-family: 'Pixelify Sans', sans-serif;
    font-weight: 700;
    text-shadow: 2px 2px 0px #000;
}

.body-text {
    font-family: 'Pixelify Sans', sans-serif;
    font-size: 22px;
    color: #e0e0e0;
    line-height: 1.5;
}

.retro-text {
    font-size: 24px;
    margin: 10px 0;
    font-family: 'Pixelify Sans', sans-serif;
}

.highlight-text {
    color: var(--border-color);
    font-size: 34px;
    margin: 10px 0;
    font-family: 'Pixelify Sans', sans-serif;
    font-weight: 700;
    text-shadow: 2px 2px 0px #000;
}

.center-content {
    text-align: center;
}

hr {
    border: 0;
    border-bottom: 2px dashed var(--border-color);
    margin: 20px 0;
}

.zona-reproductor {
    margin-top: 20px;
    border: 2px solid var(--border-color);
    border-radius: 4px;
    overflow: hidden;
}

.radio-lista {
    display: flex;
    flex-direction: column;
    gap: 8px;
    max-height: 220px;
    overflow-y: auto;
    padding-right: 10px;
}

.radio-lista::-webkit-scrollbar {
    width: 12px;
}

.radio-lista::-webkit-scrollbar-track {
    background: rgba(15, 0, 5, 0.9);
    border: 2px solid var(--border-color);
}

.radio-lista::-webkit-scrollbar-thumb {
    background: var(--border-color);
}

.radio-btn {
    background-color: transparent;
    border: 1px dashed var(--border-color);
    color: #fff;
    padding: 10px;
    font-family: 'Pixelify Sans', sans-serif;
    font-size: 22px;
    text-align: center;
    cursor: pointer;
    transition: 0.3s;
}

.radio-btn:hover {
    background-color: rgba(255, 77, 109, 0.2);
    color: var(--border-color);
}

.modal-oculto {
    display: none;
}

.modal-visible { 
    display: flex; 
    position: fixed; 
    top: 0; left: 0; width: 100%; height: 100%; 
    background: rgba(0, 0, 0, 0.85); 
    justify-content: center; align-items: center; 
    z-index: 1000;
}

.modal-contenido { 
    width: 90%; 
    max-width: 700px; 
    max-height: 85vh; 
    overflow-y: auto;
}

#texto-aniversario {
    font-family: 'Pixelify Sans', sans-serif;
    font-size: 24px;
    color: #fff;
    line-height: 1.5;
}

.galeria-recuerdos {
    display: flex;
    flex-direction: column;
    gap: 20px;
}

.item-recuerdo {
    display: flex;
    gap: 20px;
    align-items: center;
    padding: 15px;
    background-color: rgba(10, 0, 2, 0.9);
}

.decoracion-foto {
    background: #fff;
    padding: 8px 8px 25px 8px;
    box-shadow: 0 4px 8px rgba(0,0,0,0.5);
    width: 150px;
    height: 150px;
    flex-shrink: 0;
}

.decoracion-foto img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
}

.texto-recuerdo {
    flex-grow: 1;
}

.btn-accion {
    background-color: rgba(15, 0, 5, 0.9);
    border: 2px solid var(--border-color);
    color: var(--text-light);
    padding: 12px 20px;
    width: 100%;
    text-align: center;
    cursor: pointer;
    font-family: 'Pixelify Sans', sans-serif;
    font-size: 22px;
    transition: all 0.3s ease;
    border-radius: 4px;
}

.btn-accion:hover {
    background-color: var(--border-color);
    color: #000;
    box-shadow: 0 0 10px var(--border-color);
}

@media (max-width: 850px) {
    #index-flex {
        flex-direction: column;
    }
    .index-sidebar {
        width: 100%;
    }
}

@media (max-width: 600px) {
    .item-recuerdo {
        flex-direction: column;
        text-align: center;
    }
}
.grid-galeria-grande {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
    gap: 25px;
    margin-top: 20px;
}

.tarjeta-foto-grande {
    background: rgba(10, 0, 2, 0.9);
    border: 2px solid var(--border-color);
    padding: 15px;
    border-radius: 4px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.8);
    display: flex;
    flex-direction: column;
    align-items: center;
}

.tarjeta-foto-grande img {
    width: 100%;
    max-height: 320px;
    object-fit: contain;
    background: #000;
    border: 2px solid #fff;
    border-radius: 2px;
    display: block;
}
.grid-galeria-grande {
    display: flex;
    flex-direction: column;
    gap: 25px;
    margin-top: 20px;
}

.tarjeta-foto-grande {
    background: rgba(10, 0, 2, 0.9);
    border: 2px solid var(--border-color);
    padding: 15px;
    border-radius: 4px;
    box-shadow: 0 4px 10px rgba(0,0,0,0.8);
    display: flex;
    flex-direction: column;
    align-items: center;
    width: 100%;
    box-sizing: border-box;
}

.tarjeta-foto-grande img {
    width: 100%;
    max-height: 450px;
    object-fit: cover;
    background: #000;
    border: 2px solid #fff;
    border-radius: 2px;
    display: block;
}