:root {
    --primary-color: #6D28D9;
    --primary-hover: #5B21B6;
    --secondary-color: #A78BFA;
    --dark-bg: #111827;
    --medium-bg: #1F2937;
    --light-bg: #374151;
    --text-light: #F9FAFB;
    --text-dark: #9CA3AF;
    --success-color: #10B981;
    --error-color: #EF4444;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background-color: var(--dark-bg);
    color: var(--text-light);
    margin: 0;
    overscroll-behavior: none;
}

.page {
    display: none;
    flex-direction: column;
    min-height: 100vh;
    width: 100%;
}

.page.active {
    display: flex;
}

#app-shell {
    display: none;
    flex-direction: column;
    height: 100vh;
}

.header {
    background-color: var(--medium-bg);
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.2);
    position: sticky;
    top: 0;
    z-index: 10;
    padding: 0.75rem 1rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.header h1 {
    font-size: 1.25rem;
    font-weight: bold;
    text-overflow: ellipsis;
    overflow: hidden;
    white-space: nowrap;
    margin: 0;
}

.header-btn {
    background: none;
    border: none;
    color: white;
    padding: 0.5rem;
    border-radius: 9999px;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.header-spacer {
    width: 2.5rem;
}

.page-content {
    flex-grow: 1;
    overflow-y: auto;
}

.page-content-inner {
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

#login-page {
    align-items: center;
    justify-content: center;
    background: linear-gradient(to bottom right, #111827, #4C1D95);
    padding: 1rem;
}

.login-box {
    width: 100%;
    max-width: 28rem;
    background-color: rgba(31, 41, 55, 0.5);
    backdrop-filter: blur(10px);
    border-radius: 1rem;
    box-shadow: 0 10px 25px rgba(0, 0, 0, 0.3);
    padding: 2rem;
    box-sizing: border-box;
}

.login-box h1 {
    font-size: 1.875rem;
    font-weight: bold;
    color: white;
    text-align: center;
    margin: 0;
}

.login-box p {
    color: var(--secondary-color);
    margin-top: 0.5rem;
    text-align: center;
}

.login-form {
    margin-top: 2rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.input-group {
    position: relative;
}

.input-group .icon {
    position: absolute;
    left: 0.75rem;
    top: 50%;
    transform: translateY(-50%);
    color: var(--secondary-color);
    width: 20px;
    height: 20px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.input-field {
    width: 100%;
    box-sizing: border-box;
    background-color: var(--light-bg);
    color: white;
    border: 2px solid transparent;
    border-radius: 0.5rem;
    padding: 0.75rem 1rem 0.75rem 3rem;
    outline: none;
    transition: border-color 0.2s;
    font-size: 1rem;
}

.input-field:focus {
    border-color: var(--primary-color);
}

.btn {
    width: 100%;
    background-color: var(--primary-color);
    color: white;
    font-weight: bold;
    padding: 0.75rem 1rem;
    border-radius: 0.5rem;
    border: none;
    cursor: pointer;
    transition: background-color 0.2s;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 0.5rem;
    font-size: 1rem;
    box-sizing: border-box;
}

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

.btn:disabled {
    background-color: #4B5563;
    cursor: not-allowed;
}

.spinner {
    width: 1.5rem;
    height: 1.5rem;
    border: 4px solid rgba(255, 255, 255, 0.3);
    border-top-color: white;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

.error-msg {
    background-color: rgba(239, 68, 68, 0.2);
    color: #F87171;
    padding: 0.75rem;
    border-radius: 0.5rem;
    text-align: center;
}

.event-card {
    background-color: var(--medium-bg);
    border-radius: 1rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    overflow: hidden;
    cursor: pointer;
    transition: transform 0.3s;
}

.event-card:hover {
    transform: scale(1.02);
}

.event-card img {
    width: 100%;
    height: 10rem;
    object-fit: cover;
    display: block;
}

.event-card-content {
    padding: 1rem;
}

.event-card-content h3 {
    font-size: 1.25rem;
    font-weight: bold;
    color: white;
    margin: 0;
}

.event-card-content p {
    color: var(--secondary-color);
    font-size: 0.875rem;
    margin: 0.25rem 0 0;
}

.event-details-page .event-image-container {
    position: relative;
}

.event-details-page .event-image {
    width: 100%;
    height: 14rem;
    object-fit: cover;
    display: block;
}

.event-details-page .image-overlay {
    position: absolute;
    inset: 0;
    background: linear-gradient(to top, rgba(0, 0, 0, 0.8), transparent);
    display: flex;
    flex-direction: column;
    justify-content: flex-end;
    padding: 1rem;
    box-sizing: border-box;
}

.details-content {
    padding: 1rem;
    display: flex;
    flex-direction: column;
    gap: 1.5rem;
}

.stats-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1rem;
    text-align: center;
}

.actions-grid {
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

.scanner-page {
    width: 100%;
    height: 100%;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    background-color: black;
    position: relative;
    overflow: hidden;
}

.scanner-page video {
    min-width: 100%;
    min-height: 100%;
    width: auto;
    height: auto;
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
}

.scanner-overlay {
    position: absolute;
    inset: 0;
    display: flex;
    align-items: center;
    justify-content: center;
    pointer-events: none;
}

.scanner-box {
    width: 70vw;
    max-width: 280px;
    height: 70vw;
    max-height: 280px;
    border: 4px dashed var(--primary-color);
    border-radius: 1rem;
    animation: pulse 2s infinite;
    box-shadow: 0 0 0 100vmax rgba(0,0,0,0.5);
}

@keyframes pulse {
    50% {
        opacity: 0.5;
    }
}

.attendee-card {
    background-color: var(--medium-bg);
    padding: 1rem;
    border-radius: 0.5rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
}

.attendee-checkbox {
    width: 1.5rem;
    height: 1.5rem;
    border-radius: 0.25rem;
    accent-color: var(--primary-color);
}

.attendee-checkbox:disabled {
    opacity: 0.5;
}

.side-menu {
    position: fixed;
    top: 0;
    left: 0;
    height: 100%;
    width: 80%;
    max-width: 18rem;
    background-color: var(--dark-bg);
    z-index: 50;
    box-shadow: 0 0 20px rgba(0, 0, 0, 0.5);
    transform: translateX(-100%);
    transition: transform 0.3s ease-in-out;
}

.side-menu.open {
    transform: translateX(0);
}

.menu-backdrop {
    position: fixed;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.7);
    z-index: 40;
}

.menu-profile {
    padding: 1.5rem;
    background: linear-gradient(to right, #4C1D95, var(--primary-color));
}

.menu-profile img {
    width: 4rem;
    height: 4rem;
    border-radius: 50%;
    border: 2px solid var(--secondary-color);
    margin-bottom: 0.75rem;
}

.menu-nav {
    padding: 1rem;
}

.menu-nav ul {
    list-style: none;
    padding: 0;
    margin: 0;
}

.menu-nav button {
    width: 100%;
    display: flex;
    align-items: center;
    gap: 1rem;
    padding: 0.75rem;
    color: white;
    border-radius: 0.5rem;
    background: none;
    border: none;
    text-align: left;
    font-size: 1rem;
    cursor: pointer;
}

.menu-nav button:hover {
    background-color: var(--primary-color);
}

#install-btn {
    background-color: var(--success-color);
}

.loading-state {
    text-align: center;
    padding: 2rem;
    color: var(--text-dark);
}
.loading-state .spinner {
    margin: 0 auto 1rem;
}

/* --- NEW STYLES FOR ATTENDEE TABS --- */
.tabs-container {
    display: flex;
    gap: 0.5rem;
    width: 100%;
    overflow-x: auto;
}

.tab-btn {
    flex-basis: 0;
    flex-grow: 1;
    padding: 0.5rem 0.75rem;
    border: 1px solid var(--light-bg);
    background-color: var(--medium-bg);
    color: var(--text-dark);
    border-radius: 0.5rem;
    cursor: pointer;
    font-size: 0.875rem;
    white-space: nowrap;
    transition: all 0.2s;
}

.tab-btn:hover {
    background-color: var(--light-bg);
    color: var(--text-light);
}

.tab-btn.active {
    background-color: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    font-weight: bold;
}