:root {
    color-scheme: dark;
    --bg-color: #121212;
    --card-bg: #1e1e1e;
    --primary: #bb86fc;
    --primary-rgb: 187, 134, 252;
    --primary-variant: #3700b3;
    --secondary: #03dac6;
    --error: #cf6679;
    --on-bg: #e1e1e1;
    --on-surface: #ffffff;
    --purple: #6200ea;
    --purple-light: #7c4dff;
    --input-bg: #252525;
    --input-border: #333;
    --subtitle-color: #999;
}

/* Light Theme Overrides */
[data-theme="light"] {
    color-scheme: light;
    --bg-color: #f5f5f7;
    --card-bg: #ffffff;
    --primary: #6200ea;
    --primary-rgb: 98, 0, 234;
    --primary-variant: #3700b3;
    --secondary: #018786;
    --error: #b00020;
    --on-bg: #121212;
    --on-surface: #000000;
    --purple: #6200ea;
    --purple-light: #7c4dff;
    --input-bg: #f0f0f0;
    --input-border: #ddd;
    --subtitle-color: #555;
}

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

body {
    font-family: 'Inter', sans-serif;
    background-color: var(--bg-color);
    color: var(--on-bg);
    line-height: 1.6;
    padding: 20px;
    transition: background-color 0.3s ease, color 0.3s ease;
    touch-action: manipulation; /* Disable double-tap to zoom */
}

.container {
    max-width: 600px;
    margin: 0 auto;
    padding: 20px;
}

.footer {
    display: flex;
    justify-content: center;
    margin-top: 40px;
    padding: 20px 0;
    border-top: 1px solid var(--input-border);
}

.theme-toggle-btn {
    background: var(--card-bg);
    border: 1px solid var(--input-border);
    color: var(--on-bg);
    padding: 8px 16px;
    border-radius: 8px;
    cursor: pointer;
    font-size: 1rem;
    box-shadow: 0 2px 10px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    gap: 8px;
}

.theme-toggle-btn::after {
    content: "Switch Theme";
    font-size: 0.85rem;
    font-weight: 600;
}

header {
    text-align: center;
    margin-bottom: 40px;
}

h1 {
    font-family: 'Righteous', cursive;
    font-size: 3rem;
    color: var(--primary);
    margin-bottom: 5px;
    letter-spacing: 1px;
}

.subtitle {
    color: #999;
    font-size: 1.1rem;
    margin-bottom: 15px;
}

.attendee-actions {
    display: flex;
    gap: 8px;
}

.attendee-actions button {
    background: transparent;
    border: 1px solid var(--secondary);
    color: var(--secondary);
    padding: 4px 10px;
    border-radius: 6px;
    font-size: 0.75rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
}

.attendee-actions button:hover {
    background: var(--secondary);
    color: black;
}

.attendee-actions .cancel-reg-btn {
    border-color: var(--error);
    color: var(--error);
}

.attendee-actions .cancel-reg-btn:hover {
    background: var(--error);
    color: white;
}

.badge-container {
    display: flex;
    justify-content: center;
    gap: 10px;
    margin-bottom: 20px;
}

.badge {
    display: inline-block;
    background-color: var(--card-bg);
    border: 1px solid var(--purple);
    color: var(--primary);
    padding: 5px 15px;
    border-radius: 8px;
    font-weight: bold;
    font-size: 0.85rem;
    transition: opacity 0.4s ease, transform 0.4s ease;
    opacity: 0;
    transform: translateY(5px);
}

.badge.showing {
    opacity: 1;
    transform: translateY(0);
}

.badge.hidden {
    display: none !important;
}

.held-badge {
    border-color: #ff9800;
    color: #ff9800;
    background: rgba(255, 152, 0, 0.05);
}

.viewing-badge {
    border-color: #03a9f4;
    color: #03a9f4;
    background: rgba(3, 169, 244, 0.05);
}

.card {
    background-color: var(--card-bg);
    padding: 30px;
    border-radius: 15px;
    box-shadow: 0 10px 30px rgba(0,0,0,0.1);
    margin-bottom: 30px;
    border: 1px solid var(--input-border);
}

.btn {
    display: block;
    width: 100%;
    padding: 15px;
    border: none;
    border-radius: 8px;
    font-size: 1.1rem;
    font-weight: bold;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: center;
    margin-bottom: 10px;
}

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

.primary-btn:hover {
    background-color: var(--purple-light);
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(98, 0, 234, 0.4);
}

.login-btn {
    background-color: transparent !important;
    color: var(--secondary) !important;
    border: 1px solid var(--secondary) !important;
}

.login-btn:hover {
    background-color: rgba(3, 218, 198, 0.1) !important;
    transform: translateY(-2px);
    box-shadow: 0 5px 15px rgba(3, 218, 198, 0.2);
}

.secondary-btn {
    background-color: transparent;
    color: var(--secondary);
    border: 1px solid var(--secondary);
}

.secondary-btn:hover {
    background-color: rgba(3, 218, 198, 0.1);
    color: var(--on-bg);
    border-color: var(--secondary);
}

.register-btn {
    background-color: var(--secondary);
    color: #000;
    margin-top: 20px;
}

.register-btn:hover {
    background-color: #04f0d9;
    transform: translateY(-2px);
}

.hidden {
    display: none !important;
}

#timer-container {
    background: var(--input-bg);
    padding: 10px;
    text-align: center;
    border-radius: 8px;
    margin-bottom: 20px;
    font-weight: bold;
    color: var(--primary);
    border: 1px solid var(--input-border);
}

#timer {
    font-size: 1.4rem;
    display: block;
}

.form-group {
    margin-bottom: 20px;
}

.form-group label {
    display: block;
    margin-bottom: 8px;
    color: #bbb;
}

input[type="text"],
input[type="tel"],
input[type="email"],
input[type="password"],
input[type="date"],
input[type="time"],
input[type="number"] {
    width: 100%;
    padding: 12px;
    background-color: var(--input-bg);
    border: 1px solid var(--input-border);
    border-radius: 8px;
    color: var(--on-bg);
    font-size: 16px; /* Prevents iOS zoom on focus */
}

input:focus {
    outline: none;
    border-color: var(--primary);
}

#attendees-section {
    margin-top: 40px;
}

h3 {
    margin-bottom: 20px;
    border-bottom: 1px solid var(--input-border);
    padding-bottom: 10px;
    color: var(--primary);
}

#attendees-list {
    list-style: none;
}

#attendees-list li {
    padding: 12px 0;
    border-bottom: 1px solid var(--input-border);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.attendee-actions {
    display: flex;
    gap: 8px;
}

.cancel-btn-small, .edit-btn-small {
    background: transparent;
    padding: 4px 8px;
    border-radius: 6px;
    font-size: 1rem;
    cursor: pointer;
    transition: all 0.2s ease;
    border: 1px solid transparent;
}

.cancel-btn-small {
    color: var(--error);
    border-color: rgba(207, 102, 121, 0.3);
}

.cancel-btn-small:hover {
    background: rgba(207, 102, 121, 0.1);
    border-color: var(--error);
}

.edit-btn-small {
    color: var(--secondary);
    border-color: rgba(3, 218, 198, 0.3);
}

.edit-btn-small:hover {
    background: rgba(3, 218, 198, 0.1);
    border-color: var(--secondary);
}

.attendee-info {
    flex-grow: 1;
}

#attendees-list li:last-child {
    border-bottom: none;
}

/* Custom Checkbox */
.checkbox-container {
    display: flex;
    align-items: center;
    cursor: pointer;
    user-select: none;
    font-size: 0.95rem;
}

.checkbox-container input {
    margin-right: 12px;
    width: 20px;
    height: 20px;
    accent-color: var(--purple);
}

#toast {
    position: fixed;
    bottom: 30px;
    left: 50%;
    transform: translateX(-50%);
    background: #333;
    color: white;
    padding: 12px 24px;
    border-radius: 30px;
    box-shadow: 0 5px 15px rgba(0,0,0,0.5);
    z-index: 1000;
    transition: all 0.3s ease;
}

#toast.success {
    background: var(--purple);
}

#toast.error {
    background: var(--error);
}

.pin-display {
    display: flex;
    justify-content: center;
    gap: 15px;
    margin-bottom: 20px;
    background: var(--input-bg);
    padding: 20px;
    border-radius: 12px;
}

.pin-dot {
    width: 15px;
    height: 15px;
    border-radius: 50%;
    background: var(--input-border);
    transition: all 0.2s ease;
    border: 1px solid var(--input-border);
}

.pin-dot.filled {
    background: var(--primary);
    box-shadow: 0 0 10px var(--primary);
    transform: scale(1.2);
}

.dialer-grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 10px;
    max-width: 260px;
    margin: 0 auto;
}

.dial-btn {
    aspect-ratio: 1;
    border-radius: 50%;
    background: var(--input-bg);
    border: 1px solid var(--input-border);
    color: var(--on-bg);
    font-size: 1.5rem;
    cursor: pointer;
    transition: all 0.2s ease;
    display: flex;
    align-items: center;
    justify-content: center;
}

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

.dial-btn:active {
    background: var(--purple);
    transform: scale(0.95);
}

.dial-btn.action {
    background: var(--bg-color);
    font-size: 1.1rem;
    color: var(--subtitle-color);
}

/* Modal Styling */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.85);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 2000;
    backdrop-filter: blur(5px);
    transition: opacity 0.3s ease;
    overflow-y: auto;
    padding: 20px 0;
}

.modal-card {
    background: var(--card-bg);
    padding: 30px;
    border-radius: 15px;
    width: 95%;
    max-width: 500px;
    border: 1px solid var(--input-border);
    box-shadow: 0 20px 50px rgba(0,0,0,0.5);
    text-align: center;
    transform: scale(1);
    transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
    max-height: calc(100vh - 40px);
    overflow-y: auto;
}

.modal-overlay.hidden .modal-card {
    transform: scale(0.9);
}

.modal-card h2 {
    font-family: 'Righteous', cursive;
    color: var(--primary);
    margin-bottom: 15px;
    font-size: 1.5rem;
}

.modal-card p {
    color: var(--subtitle-color);
    margin-bottom: 25px;
}

.modal-actions {
    display: flex;
    justify-content: center;
    gap: 15px;
}

#modal-input-container {
    margin-bottom: 20px;
}

#modal-input.pin-input, #modal-input-pin {
    text-align: center;
    font-size: 1.2rem;
    letter-spacing: 5px;
    font-family: monospace;
}

#modal-input-phone {
    text-align: center;
    letter-spacing: 1px;
}

@media (max-width: 480px) {
    h1 {
        font-size: 1.8rem;
    }
    .container {
        padding: 10px;
    }
    .card {
        padding: 20px;
    }
}