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

body {
    font-family: 'Arial', 'Helvetica', sans-serif;
    line-height: 1.8;
    background: linear-gradient(135deg, #1f96c7 0%, #2ba8d9 100%);
    color: #ffffff;
    font-weight: bold;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 20px;
    background-color: rgba(31, 150, 199, 0.95);
}

/* Header Styles */
.header {
    text-align: center;
    padding: 40px 20px;
    background: rgba(31, 150, 199, 1);
    border: 5px solid rgb(150, 31, 224);
    border-radius: 15px;
    margin-bottom: 30px;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.3);
}

.header h1 {
    font-size: 2.8em;
    color: #ffffff;
    margin-bottom: 15px;
    font-weight: bold;
    text-shadow: 3px 3px 6px rgba(0, 0, 0, 0.4);
}

.subtitle {
    font-size: 1.4em;
    color: #f0f0f0;
    font-weight: bold;
    margin-bottom: 20px;
}

.print-btn {
    background: rgb(150, 31, 224);
    color: #ffffff;
    border: 3px solid #ffffff;
    padding: 12px 30px;
    font-size: 1.1em;
    font-weight: bold;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.print-btn:hover {
    background: #ffffff;
    color: rgb(150, 31, 224);
    border-color: rgb(150, 31, 224);
    transform: scale(1.05);
}

/* Navigation Styles */
.navigation {
    background: rgba(31, 150, 199, 1);
    border: 5px solid rgb(150, 31, 224);
    border-radius: 12px;
    padding: 25px;
    margin-bottom: 30px;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
}

.navigation h2 {
    font-size: 2em;
    color: #ffffff;
    margin-bottom: 20px;
    font-weight: bold;
    text-align: center;
}

.nav-list {
    list-style: none;
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 15px;
}

.nav-btn {
    background: rgb(150, 31, 224);
    color: #ffffff;
    border: 3px solid #ffffff;
    padding: 15px 20px;
    font-size: 1.1em;
    font-weight: bold;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    text-align: left;
    width: 100%;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.nav-btn:hover {
    background: #ffffff;
    color: rgb(150, 31, 224);
    border-color: rgb(150, 31, 224);
    transform: translateX(10px);
}

/* Content Section Styles */
.content-section {
    background: rgba(31, 150, 199, 1);
    border: 5px solid rgb(150, 31, 224);
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 30px;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
}

.content-section h2 {
    font-size: 2.2em;
    color: #ffffff;
    margin-bottom: 25px;
    font-weight: bold;
    border-bottom: 4px solid rgb(150, 31, 224);
    padding-bottom: 15px;
}

.content-section h3 {
    font-size: 1.7em;
    color: #f0f0f0;
    margin: 20px 0 15px 0;
    font-weight: bold;
}

.content-section p {
    font-size: 1.2em;
    color: #ffffff;
    margin-bottom: 15px;
    font-weight: bold;
    line-height: 1.8;
}

.content-section ul {
    margin-left: 30px;
    margin-bottom: 20px;
}

.content-section li {
    font-size: 1.15em;
    color: #ffffff;
    margin-bottom: 12px;
    font-weight: bold;
    line-height: 1.7;
}

/* Formula Box Styles */
.formula-box {
    background: rgba(150, 31, 224, 0.3);
    border: 4px solid rgb(150, 31, 224);
    border-radius: 10px;
    padding: 25px;
    margin: 20px 0;
    text-align: center;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.formula-box p {
    font-size: 1.5em;
    color: #ffffff;
    font-weight: bold;
    margin: 10px 0;
}

.formula-note {
    font-size: 1.1em !important;
    color: #f0f0f0 !important;
    font-style: italic;
}

/* Example Box Styles */
.example-box {
    background: rgba(150, 31, 224, 0.2);
    border: 4px solid rgb(150, 31, 224);
    border-left: 8px solid rgb(150, 31, 224);
    border-radius: 8px;
    padding: 20px;
    margin: 20px 0;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.2);
}

.example-box h3 {
    color: #ffffff;
    font-weight: bold;
    margin-bottom: 12px;
}

.example-box p {
    color: #ffffff;
    font-weight: bold;
}

/* Table Styles */
table {
    width: 100%;
    border-collapse: collapse;
    margin: 25px 0;
    background: rgba(255, 255, 255, 0.1);
    border: 4px solid rgb(150, 31, 224);
    border-radius: 10px;
    overflow: hidden;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
}

thead {
    background: rgb(150, 31, 224);
}

thead th {
    padding: 18px;
    text-align: left;
    color: #ffffff;
    font-weight: bold;
    font-size: 1.2em;
    border-bottom: 3px solid #ffffff;
}

tbody tr {
    border-bottom: 2px solid rgb(150, 31, 224);
    transition: background 0.3s ease;
}

tbody tr:hover {
    background: rgba(150, 31, 224, 0.3);
}

tbody td {
    padding: 15px 18px;
    color: #ffffff;
    font-weight: bold;
    font-size: 1.1em;
}

tbody tr:last-child {
    border-bottom: none;
}

/* Flowchart Styles */
.flowchart {
    display: flex;
    flex-direction: column;
    align-items: center;
    margin: 30px 0;
    padding: 30px;
    background: rgba(150, 31, 224, 0.2);
    border: 4px solid rgb(150, 31, 224);
    border-radius: 12px;
}

.flow-box {
    background: rgba(31, 150, 199, 1);
    border: 4px solid rgb(150, 31, 224);
    border-radius: 10px;
    padding: 20px 30px;
    margin: 10px 0;
    min-width: 300px;
    text-align: center;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.flow-box strong {
    color: #ffffff;
    font-size: 1.2em;
    font-weight: bold;
}

.flow-box.start {
    background: rgb(150, 31, 224);
    border-color: #ffffff;
}

.flow-box.decision {
    background: rgba(150, 31, 224, 0.7);
    clip-path: polygon(50% 0%, 100% 50%, 50% 100%, 0% 50%);
    min-width: 350px;
    padding: 40px 30px;
}

.flow-box.process {
    background: rgba(31, 150, 199, 1);
}

.flow-box.end {
    background: rgb(150, 31, 224);
    border-color: #ffffff;
}

.flow-arrow {
    font-size: 2.5em;
    color: rgb(150, 31, 224);
    font-weight: bold;
    margin: 5px 0;
}

.flow-note {
    margin-top: 25px;
    padding: 15px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    font-weight: bold;
    color: #ffffff;
    text-align: center;
}

.flowchart-simple {
    background: rgba(150, 31, 224, 0.2);
    border: 4px solid rgb(150, 31, 224);
    border-radius: 10px;
    padding: 25px;
    margin: 20px 0;
}

.flow-item {
    background: rgba(31, 150, 199, 1);
    border: 3px solid #ffffff;
    border-radius: 8px;
    padding: 15px 20px;
    margin: 12px 0;
    font-weight: bold;
    color: #ffffff;
    font-size: 1.15em;
    box-shadow: 0 3px 8px rgba(0, 0, 0, 0.2);
}

/* Question Box Styles */
.question-box {
    background: rgba(150, 31, 224, 0.25);
    border: 4px solid rgb(150, 31, 224);
    border-radius: 10px;
    padding: 25px;
    margin: 25px 0;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
}

.question-box h3 {
    color: #ffffff;
    font-weight: bold;
    margin-bottom: 15px;
}

.question-box p {
    color: #ffffff;
    font-weight: bold;
    font-size: 1.2em;
    margin-bottom: 15px;
}

.solution-btn {
    background: rgb(150, 31, 224);
    color: #ffffff;
    border: 3px solid #ffffff;
    padding: 12px 25px;
    font-size: 1.1em;
    font-weight: bold;
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    margin-top: 10px;
    box-shadow: 0 4px 10px rgba(0, 0, 0, 0.3);
}

.solution-btn:hover {
    background: #ffffff;
    color: rgb(150, 31, 224);
    border-color: rgb(150, 31, 224);
    transform: scale(1.05);
}

.solution-hidden {
    display: none;
    margin-top: 20px;
    padding: 20px;
    background: rgba(255, 255, 255, 0.15);
    border: 3px solid #ffffff;
    border-radius: 8px;
}

.solution-hidden p {
    color: #ffffff;
    font-weight: bold;
    margin: 8px 0;
}

/* Footer Styles */
.footer {
    text-align: center;
    padding: 30px;
    background: rgba(31, 150, 199, 1);
    border: 5px solid rgb(150, 31, 224);
    border-radius: 12px;
    margin-top: 30px;
    box-shadow: 0 6px 15px rgba(0, 0, 0, 0.3);
}

.footer p {
    color: #ffffff;
    font-weight: bold;
    font-size: 1.2em;
    margin: 8px 0;
}

/* Print Styles */
@media print {
    body {
        background: white;
        color: black;
    }
    
    .container {
        background: white;
    }
    
    .print-btn {
        display: none;
    }
    
    .navigation {
        display: none;
    }
    
    .solution-btn {
        display: none;
    }
    
    .solution-hidden {
        display: block !important;
    }
    
    .content-section {
        page-break-inside: avoid;
        border: 2px solid #333;
    }
    
    table {
        page-break-inside: avoid;
    }
}

/* Responsive Design */
@media (max-width: 768px) {
    .header h1 {
        font-size: 2em;
    }
    
    .subtitle {
        font-size: 1.1em;
    }
    
    .nav-list {
        grid-template-columns: 1fr;
    }
    
    .content-section h2 {
        font-size: 1.8em;
    }
    
    .content-section h3 {
        font-size: 1.4em;
    }
    
    .content-section p,
    .content-section li {
        font-size: 1em;
    }
    
    table {
        font-size: 0.9em;
    }
    
    .flow-box {
        min-width: 250px;
    }
}

/* Scrollbar Styling */
::-webkit-scrollbar {
    width: 12px;
}

::-webkit-scrollbar-track {
    background: rgba(31, 150, 199, 0.5);
}

::-webkit-scrollbar-thumb {
    background: rgb(150, 31, 224);
    border-radius: 6px;
    border: 2px solid rgba(31, 150, 199, 0.5);
}

::-webkit-scrollbar-thumb:hover {
    background: rgba(150, 31, 224, 0.8);
}