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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background: #ffffff;
    color: #4a4a4a;
    line-height: 1.6;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    padding: 40px 20px;
    border-bottom: 3px solid #1e3a8a;
    margin-bottom: 40px;
}

h1 {
    color: #1e3a8a;
    font-size: 2.5rem;
    margin-bottom: 10px;
}

h2 {
    color: #1e3a8a;
    font-size: 2rem;
    margin-bottom: 20px;
}

h3 {
    color: #1e3a8a;
    font-size: 1.5rem;
    margin-bottom: 15px;
}

.subtitle {
    color: #6b7280;
    font-size: 1.1rem;
}

.intro {
    text-align: center;
    margin-bottom: 50px;
}

.intro p {
    max-width: 800px;
    margin: 0 auto;
    color: #4a4a4a;
    font-size: 1.1rem;
}

.help-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
    margin-bottom: 50px;
}

.help-card {
    background: #f9fafb;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    padding: 30px;
    text-decoration: none;
    transition: all 0.3s ease;
    display: block;
}

.help-card:hover {
    border-color: #1e3a8a;
    box-shadow: 0 4px 12px rgba(30, 58, 138, 0.15);
    transform: translateY(-2px);
}

.card-icon {
    font-size: 3rem;
    margin-bottom: 15px;
}

.help-card h3 {
    margin-bottom: 10px;
}

.help-card p {
    color: #6b7280;
    font-size: 0.95rem;
}

footer {
    text-align: center;
    padding: 30px 20px;
    border-top: 2px solid #e5e7eb;
    color: #6b7280;
    margin-top: 50px;
}

/* Navigation styles */
.nav-links {
    display: flex;
    gap: 15px;
    margin-bottom: 30px;
    flex-wrap: wrap;
}

.nav-btn {
    background: #1e3a8a;
    color: white;
    padding: 12px 24px;
    border-radius: 8px;
    text-decoration: none;
    font-weight: 500;
    transition: background 0.3s ease;
    display: inline-block;
}

.nav-btn:hover {
    background: #1e40af;
}

.nav-btn.back {
    background: #6b7280;
}

.nav-btn.back:hover {
    background: #4b5563;
}

/* Content sections */
.content-section {
    margin-bottom: 50px;
}

.step-number {
    display: inline-block;
    background: #1e3a8a;
    color: white;
    width: 35px;
    height: 35px;
    border-radius: 50%;
    text-align: center;
    line-height: 35px;
    font-weight: bold;
    margin-right: 10px;
}

.step {
    margin-bottom: 30px;
    padding: 20px;
    background: #f9fafb;
    border-left: 4px solid #1e3a8a;
    border-radius: 4px;
}

.step h3 {
    display: flex;
    align-items: center;
    margin-bottom: 15px;
}

ul, ol {
    margin-left: 30px;
    margin-bottom: 20px;
}

li {
    margin-bottom: 10px;
    color: #4a4a4a;
}

/* Screenshot annotation styles */
.screenshot-container {
    position: relative;
    max-width: 512px;
    margin: 30px auto;
    border: 2px solid #e5e7eb;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}

.screenshot-container img {
    width: 100%;
    height: auto;
    display: block;
}

.annotation {
    position: absolute;
    pointer-events: none;
}

/* Arrow styles */
.arrow {
    width: 60px;
    height: 60px;
    background: rgba(255, 215, 0, 0.9);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 30px;
    animation: pulse 2s infinite;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
}

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.1); }
}

/* Label styles */
.label {
    background: rgba(30, 58, 138, 0.95);
    color: white;
    padding: 10px 15px;
    border-radius: 8px;
    font-weight: 500;
    font-size: 14px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.3);
    max-width: 200px;
    line-height: 1.4;
}

/* Highlight box styles */
.highlight-box {
    border: 3px solid #ffd700;
    border-radius: 8px;
    background: rgba(255, 215, 0, 0.15);
    animation: blink 1.5s infinite;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0.6; }
}

/* Circle highlight */
.circle-highlight {
    border: 3px solid #ef4444;
    border-radius: 50%;
    background: rgba(239, 68, 68, 0.1);
    animation: pulse-circle 2s infinite;
}

@keyframes pulse-circle {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

/* Info boxes */
.info-box {
    background: #dbeafe;
    border-left: 4px solid #1e3a8a;
    padding: 20px;
    margin: 20px 0;
    border-radius: 4px;
}

.info-box h4 {
    color: #1e3a8a;
    margin-bottom: 10px;
}

.warning-box {
    background: #fef3c7;
    border-left: 4px solid #f59e0b;
    padding: 20px;
    margin: 20px 0;
    border-radius: 4px;
}

.warning-box h4 {
    color: #f59e0b;
    margin-bottom: 10px;
}

.success-box {
    background: #d1fae5;
    border-left: 4px solid #10b981;
    padding: 20px;
    margin: 20px 0;
    border-radius: 4px;
}

.success-box h4 {
    color: #10b981;
    margin-bottom: 10px;
}

/* Table styles */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 20px 0;
    background: white;
}

th {
    background: #1e3a8a;
    color: white;
    padding: 12px;
    text-align: left;
}

td {
    padding: 12px;
    border-bottom: 1px solid #e5e7eb;
}

tr:hover {
    background: #f9fafb;
}

/* Responsive design */
@media (max-width: 768px) {
    h1 { font-size: 2rem; }
    h2 { font-size: 1.5rem; }
    h3 { font-size: 1.25rem; }
    
    .help-grid {
        grid-template-columns: 1fr;
    }
    
    .nav-links {
        flex-direction: column;
    }
    
    .nav-btn {
        text-align: center;
    }
}