:root {
    --primary-blue: #0056b3;
    --primary-purple: #6a0dad;
    --accent-color: #ff9800;
    --bg-color: #f0f2f5;
    --card-bg: #ffffff;
    --text-main: #1c1e21;
    --text-muted: #65676b;
    --border-color: #dadde1;
    --success-green: #2e7d32;
    --shadow: 0 2px 4px rgba(0, 0, 0, 0.1), 0 8px 16px rgba(0, 0, 0, 0.1);
}

* {
    box-sizing: border-box;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
    background-color: var(--bg-color);
    color: var(--text-main);
    margin: 0;
    padding: 0;
    display: flex;
    justify-content: center;
    align-items: flex-start;
    min-height: 100vh;
}

.app-container {
    background-color: var(--card-bg);
    max-width: 500px;
    width: 100%;
    margin: 20px;
    border-radius: 12px;
    box-shadow: var(--shadow);
    padding: 24px;
    display: flex;
    flex-direction: column;
}

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

h1 { font-size: 1.8rem; color: var(--primary-blue); margin-bottom: 8px; }
h2 { font-size: 1.4rem; margin-top: 0; }
h3 { font-size: 1.1rem; font-weight: 500; margin-bottom: 24px; }

.text-muted { color: var(--text-muted); }

/* Buttons & Navigation */
.btn-container {
    display: flex;
    flex-direction: column;
    gap: 16px;
    width: 100%;
}

.btn {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    width: 100%;
    padding: 16px;
    border-radius: 10px;
    font-size: 1.2rem;
    font-weight: 600;
    text-decoration: none;
    transition: all 0.2s ease;
    text-align: center;
    border: none;
}

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

.btn-blue:hover {
    background-color: #004494;
    transform: translateY(-2px);
}

.btn-blue:active {
    transform: translateY(0);
}

.btn-back {
    display: inline-flex;
    align-items: center;
    color: var(--primary-blue);
    text-decoration: none;
    font-size: 0.95rem;
    font-weight: 500;
    margin-bottom: 20px;
}

.btn-back:hover {
    text-decoration: underline;
}

.flags {
    font-size: 1.5rem;
    margin-top: 4px;
}

/* Alert Boxes */
.alert-box {
    background-color: #e8f4fd;
    border-left: 4px solid var(--primary-blue);
    padding: 16px;
    border-radius: 8px;
    margin-bottom: 24px;
    font-size: 0.95rem;
    line-height: 1.5;
}

/* Task Cards */
.task-list {
    list-style: none;
    padding: 0;
    margin: 0;
}

.task-item {
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 20px;
    margin-bottom: 20px;
    background-color: #fafafa;
}

.task-header {
    display: flex;
    align-items: center;
    font-weight: 700;
    font-size: 1.1rem;
    margin-bottom: 8px;
    color: var(--text-main);
}

.task-icon {
    font-size: 1.4rem;
    margin-right: 12px;
}

.task-time {
    display: inline-block;
    background-color: #eee;
    padding: 4px 8px;
    border-radius: 4px;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-bottom: 12px;
}

.task-item p {
    margin: 0 0 16px 0;
    line-height: 1.5;
    color: #444;
}

/* Actions */
.action-link {
    display: block;
    text-align: center;
    background-color: #f0f2f5;
    color: var(--text-main);
    padding: 12px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 600;
    font-size: 0.9rem;
    margin-top: 8px;
    border: 1px solid var(--border-color);
    transition: background-color 0.2s;
}

.action-link:hover {
    background-color: #e4e6eb;
}

.action-link.primary {
    background-color: var(--primary-blue);
    color: white;
    border: none;
}

.action-link.primary:hover {
    background-color: #004494;
}

/* Video Player */
.video-container {
    width: 100%;
    margin: 12px 0;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 2px 8px rgba(0,0,0,0.1);
}

.video-container video {
    width: 100%;
    display: block;
}

/* Footer */
.footer-status {
    text-align: center;
    margin-top: 24px;
    padding-top: 16px;
    border-top: 1px solid var(--border-color);
    font-weight: 700;
    color: var(--success-green);
}

/* Mobile adjustments */
@media (max-width: 480px) {
    .app-container {
        margin: 0;
        border-radius: 0;
        min-height: 100vh;
    }
}