:root {
    --primary-color: #4F46E5; /* Indigo 600 */
    --primary-hover: #4338CA; /* Indigo 700 */
    --secondary-color: #10B981; /* Emerald 500 */
    --background: #F3F4F6; /* Gray 100 */
    --card-bg: #FFFFFF;
    --text-main: #1F2937; /* Gray 800 */
    --text-muted: #6B7280; /* Gray 500 */
    --border-radius: 12px;
    --shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: 'Inter', sans-serif;
}

body {
    background-color: var(--background);
    color: var(--text-main);
    line-height: 1.6;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

header {
    background-color: var(--card-bg);
    padding: 2rem 0;
    text-align: center;
    box-shadow: 0 1px 3px rgba(0,0,0,0.1);
    margin-bottom: 2rem;
}

header h1 {
    color: var(--primary-color);
    font-size: 2.5rem;
    margin-bottom: 0.5rem;
}

header p {
    color: var(--text-muted);
}

section {
    margin-bottom: 3rem;
}

h2 {
    font-size: 1.5rem;
    margin-bottom: 1.5rem;
    color: var(--text-main);
    border-left: 5px solid var(--primary-color);
    padding-left: 1rem;
}

/* Buttons */
.btn {
    padding: 12px 24px;
    border: none;
    border-radius: var(--border-radius);
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 1rem;
}

.btn-primary {
    background-color: var(--primary-color);
    color: white;
}

.btn-primary:hover {
    background-color: var(--primary-hover);
    transform: translateY(-2px);
}

.btn-secondary {
    background-color: var(--secondary-color);
    color: white;
    width: 100%;
}

.btn-secondary:hover {
    opacity: 0.9;
}

/* Cards & Lists */
.card {
    background: var(--card-bg);
    padding: 2rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.event-list {
    list-style: none;
    display: grid;
    gap: 1rem;
}

.event-item {
    background: var(--card-bg);
    padding: 1.5rem;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
    border-left: 5px solid transparent;
    transition: transform 0.2s;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.event-item:hover {
    transform: translateX(5px);
    border-left-color: var(--primary-color);
}

.event-info h3 {
    color: var(--text-main);
    margin-bottom: 0.5rem;
}

.event-date {
    color: var(--text-muted);
    font-size: 0.9rem;
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.empty-state {
    text-align: center;
    color: var(--text-muted);
    font-style: italic;
    padding: 2rem;
}

/* Forms */
.form-group {
    margin-bottom: 1.5rem;
}

label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: 500;
}

input, select {
    width: 100%;
    padding: 12px;
    border: 1px solid #E5E7EB;
    border-radius: 8px;
    font-size: 1rem;
    transition: border 0.3s;
}

input:focus, select:focus {
    outline: none;
    border-color: var(--primary-color);
    box-shadow: 0 0 0 3px rgba(79, 70, 229, 0.1);
}

/* Loader */
.loader {
    border: 4px solid #f3f3f3;
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 20px auto;
}

.hidden {
    display: none;
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

/* Messages */
#mensaje-reserva {
    margin-top: 1rem;
    padding: 1rem;
    border-radius: var(--border-radius);
    text-align: center;
    font-weight: 500;
}

.success-message {
    background-color: #D1FAE5;
    color: #065F46;
}

footer {
    text-align: center;
    padding: 2rem;
    color: var(--text-muted);
    font-size: 0.9rem;
}