/* ============================================
   CONFIRMACIÓN DE ASISTENCIA - ESTILOS ELEGANTES
   Tema: Azul Oscuro + Dorado
   ============================================ */

/* ============================================
   VARIABLES Y RESET
   ============================================ */
:root {
    --color-primary: #0f1923;
    --color-primary-light: #1a2836;
    --color-primary-dark: #0a1118;
    --color-gold: #c9a84c;
    --color-gold-hover: #d4b85c;
    --color-gold-dark: #b8963f;
    --color-white: #ffffff;
    --color-gray-light: #cccccc;
    --color-gray-medium: #999999;
    --color-success: #28a745;
    --color-error: #dc3545;
    --font-title: 'Playfair Display', serif;
    --font-body: 'Lato', sans-serif;
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

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

body {
    font-family: var(--font-body);
    background: linear-gradient(135deg, var(--color-primary-dark) 0%, var(--color-primary) 50%, var(--color-primary-light) 100%);
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

/* Fondo decorativo con partículas sutiles */
body::before {
    content: '';
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        radial-gradient(2px 2px at 20% 30%, rgba(201, 168, 76, 0.1), transparent),
        radial-gradient(2px 2px at 40% 70%, rgba(201, 168, 76, 0.08), transparent),
        radial-gradient(2px 2px at 60% 20%, rgba(201, 168, 76, 0.1), transparent),
        radial-gradient(2px 2px at 80% 50%, rgba(201, 168, 76, 0.08), transparent),
        radial-gradient(1px 1px at 25% 80%, rgba(255, 255, 255, 0.05), transparent),
        radial-gradient(1px 1px at 75% 30%, rgba(255, 255, 255, 0.05), transparent);
    background-size: 200px 200px;
    animation: sparkle 8s linear infinite;
    pointer-events: none;
    z-index: 0;
}

@keyframes sparkle {
    0% { transform: translateY(0); }
    100% { transform: translateY(-200px); }
}

.main-container {
    position: relative;
    z-index: 1;
    padding: 20px;
}

/* ============================================
   CARD PRINCIPAL
   ============================================ */
.rsvp-card {
    background: linear-gradient(145deg, rgba(15, 25, 35, 0.95), rgba(26, 40, 54, 0.98));
    border: 1px solid rgba(201, 168, 76, 0.3);
    border-radius: 20px;
    padding: 40px 35px;
    box-shadow: 
        0 20px 60px rgba(0, 0, 0, 0.5),
        0 0 100px rgba(201, 168, 76, 0.1),
        inset 0 1px 0 rgba(255, 255, 255, 0.05);
    backdrop-filter: blur(10px);
    animation: cardEntrance 0.8s ease-out;
}

@keyframes cardEntrance {
    0% {
        opacity: 0;
        transform: translateY(30px) scale(0.95);
    }
    100% {
        opacity: 1;
        transform: translateY(0) scale(1);
    }
}

/* ============================================
   SECCIÓN DE ENCABEZADO
   ============================================ */
.header-section {
    margin-bottom: 35px;
    text-align: center;
}

.decorative-line-top {
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-gold), transparent);
    margin: 0 auto 20px;
    animation: expandLine 1s ease-out 0.3s both;
}

@keyframes expandLine {
    0% { width: 0; opacity: 0; }
    100% { width: 60px; opacity: 1; }
}

.main-title {
    font-family: var(--font-title);
    color: var(--color-white);
    font-size: 1.8rem;
    font-weight: 700;
    letter-spacing: 1px;
    margin-bottom: 8px;
    text-shadow: 0 2px 10px rgba(0, 0, 0, 0.3);
    animation: fadeIn 0.8s ease-out 0.5s both;
}

@keyframes fadeIn {
    0% { opacity: 0; }
    100% { opacity: 1; }
}

.subtitle {
    font-family: var(--font-body);
    color: var(--color-gold);
    font-size: 0.75rem;
    letter-spacing: 4px;
    text-transform: uppercase;
    font-weight: 300;
    animation: fadeIn 0.8s ease-out 0.7s both;
}

.decorative-line-bottom {
    width: 60px;
    height: 2px;
    background: linear-gradient(90deg, transparent, var(--color-gold), transparent);
    margin: 15px auto 0;
    animation: expandLine 1s ease-out 0.9s both;
}

/* ============================================
   FORMULARIO - ETIQUETAS
   ============================================ */
.form-label {
    color: var(--color-gold);
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0.5px;
    margin-bottom: 8px;
}

.optional-text {
    color: var(--color-gray-medium);
    font-style: italic;
    font-weight: 300;
}

/* ============================================
   FORMULARIO - CAMPOS DE ENTRADA
   ============================================ */
/* ============================================
CAMPOS DE ENTRADA - estilo base
============================================ */
.form-control {
background-color: rgba(255, 255, 255, 0.05);
border: 1px solid rgba(201, 168, 76, 0.3);
border-radius: var(--border-radius);
color: var(--color-white);
font-family: var(--font-body);
font-size: 1rem;
padding: 12px 16px;
transition: var(--transition);
}

/* ============================================
SELECTOR BASE (todos los selects)
============================================ */
.form-select {
    background-color: rgba(255, 255, 255, 0.05);
    border: 1px solid rgba(201, 168, 76, 0.3);
    border-radius: var(--border-radius);
    color: var(--color-white);
    font-family: var(--font-body);
    font-size: 1rem;
    padding: 12px 16px;
    transition: var(--transition);
    cursor: pointer;
    appearance: none;
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%23c9a84c' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e");
    background-repeat: no-repeat;
    background-position: right 12px center;
    background-size: 12px;
    padding-right: 40px;
}

.form-control::placeholder {
    color: var(--color-gray-medium);
    font-weight: 300;
}

.form-control:focus,
.form-select:focus {
    background-color: rgba(255, 255, 255, 0.08);
    border-color: var(--color-gold);
    color: var(--color-white);
    box-shadow: 0 0 0 0.2rem rgba(201, 168, 76, 0.15);
    outline: none;
    animation: inputFocusGlow 0.5s ease-out;
}

.form-select option {
    background-color: var(--color-primary);
    color: var(--color-white);
}

/* Validación visual */
.form-control.is-invalid,
.form-select.is-invalid {
    border-color: var(--color-error);
    box-shadow: none;
}

.invalid-feedback {
    color: var(--color-error);
    font-size: 0.8rem;
    margin-top: 4px;
}

/* ============================================
   GRUPO DE TELÉFONO
   ============================================ */
.phone-input-group {
    display: flex;
    gap: 0;
    align-items: stretch;
}

.phone-select {
    max-width: 140px;
    border-radius: var(--border-radius) 0 0 var(--border-radius);
    border-right: none;
    padding: 12px 8px;
    text-align: center;
    font-size: 0.9rem;
}

.phone-select:focus {
    border-right: 1px solid var(--color-gold);
    box-shadow: none;
}

.phone-number {
    flex: 1;
    border-radius: 0 var(--border-radius) var(--border-radius) 0;
    padding-left: 16px;
}

/* ============================================
    ESTILO DEL SELECTOR (invitado por) - estilo botón redondeado
    ============================================ */
.form-select.inverted-select {
    background-color: transparent;
    border: 2px solid rgba(201, 168, 76, 0.3);
    border-radius: 50px;
    color: var(--color-gray-light);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 400;
    padding: 14px 40px 14px 20px;
    text-align: left;
    text-align-last: left;
    transition: var(--transition);
}

.form-select.inverted-select:focus {
    border-color: var(--color-gold);
    background-color: rgba(255, 255, 255, 0.05);
    color: var(--color-white);
    box-shadow: 0 0 0 0.2rem rgba(201, 168, 76, 0.15);
}

/* Estilo para select con error */
.form-select.inverted-select.is-invalid {
    border-color: var(--color-error);
    box-shadow: none;
}

/* ============================================
    ETIQUETA PARA ASISTENCIA
    ============================================ */
.attendance-label-title {
    color: var(--color-gold);
    font-family: var(--font-body);
    font-size: 0.85rem;
    font-weight: 400;
    letter-spacing: 0.5px;
    margin-bottom: 12px;
}

/* ============================================
   BOTÓN CONFIRMAR
   ============================================ */
.btn-confirm {
    background: linear-gradient(135deg, var(--color-gold-dark), var(--color-gold), var(--color-gold-dark));
    border: none;
    color: var(--color-primary-dark);
    font-family: var(--font-body);
    font-size: 1rem;
    font-weight: 700;
    letter-spacing: 2px;
    padding: 16px 40px;
    border-radius: 50px;
    width: 100%;
    cursor: pointer;
    transition: var(--transition);
    text-transform: uppercase;
    box-shadow: 0 5px 20px rgba(201, 168, 76, 0.3);
}

.btn-confirm:hover {
    background: linear-gradient(135deg, var(--color-gold), var(--color-gold-hover), var(--color-gold));
    transform: translateY(-2px);
    box-shadow: 0 8px 30px rgba(201, 168, 76, 0.4);
    color: var(--color-primary-dark);
}

.btn-confirm:active {
    transform: translateY(0);
    box-shadow: 0 3px 15px rgba(201, 168, 76, 0.3);
}

.btn-confirm:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

/* ============================================
   MENSAJE DE ÉXITO
   ============================================ */
.success-message {
    text-align: center;
    padding: 40px 20px;
    animation: successEntrance 0.6s ease-out;
}

@keyframes successEntrance {
    0% {
        opacity: 0;
        transform: scale(0.8);
    }
    100% {
        opacity: 1;
        transform: scale(1);
    }
}

.success-icon {
    font-size: 4rem;
    color: var(--color-success);
    margin-bottom: 20px;
}

.success-title {
    font-family: var(--font-title);
    color: var(--color-white);
    font-size: 1.5rem;
    margin-bottom: 10px;
}

.success-text {
    color: var(--color-gray-light);
    font-size: 1rem;
    font-weight: 300;
}

/* ============================================
   OCULTAR ELEMENTOS
   ============================================ */
.form-section {
    display: block;
}

/* ============================================
   RESPONSIVE DESIGN
   ============================================ */

/* Móvil pequeño */
@media (max-width: 576px) {
    .rsvp-card {
        padding: 30px 20px;
        border-radius: 15px;
    }

    .main-title {
        font-size: 1.4rem;
    }

    .subtitle {
        font-size: 0.65rem;
        letter-spacing: 3px;
    }

    .phone-input-group {
        flex-direction: column;
        gap: 8px;
    }

    .phone-select {
        max-width: 100%;
        border-radius: var(--border-radius) !important;
    }

    .phone-number {
        border-radius: var(--border-radius) !important;
    }

    .btn-confirm {
        padding: 14px 30px;
        font-size: 0.9rem;
    }
}

/* Tablet */
@media (min-width: 768px) {
    .rsvp-card {
        padding: 50px 45px;
    }

    .main-title {
        font-size: 2rem;
    }
}

/* Desktop grande */
@media (min-width: 992px) {
    .rsvp-card {
        padding: 60px 50px;
    }
}

/* ============================================
   ANIMACIONES ADICIONALES
   ============================================ */
@keyframes inputFocusGlow {
    0% {
        box-shadow: 0 0 0 0 rgba(201, 168, 76, 0.3);
    }
    50% {
        box-shadow: 0 0 0 6px rgba(201, 168, 76, 0.1);
    }
    100% {
        box-shadow: 0 0 0 0 rgba(201, 168, 76, 0);
    }
}

/* Transición suave entre formulario y éxito */
#rsvpForm,
#successMessage {
    transition: opacity 0.4s ease;
}

/* Loader para botón */
.btn-confirm .spinner-border {
    width: 1.2rem;
    height: 1.2rem;
    border-width: 0.15em;
}