/* Import Google Fonts */
@import url('https://fonts.googleapis.com/css2?family=Poppins:wght@400;600&display=swap');

/* Base styles */
html {
    /* Apply background to html to ensure it covers the full page */
    background: linear-gradient(135deg, #1e3c72 0%, #2a5298 100%);
    background-attachment: fixed; /* Keep the background static */
}

body {
    font-family: 'Poppins', 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    color: #333;
    margin: 0;
    /* Add padding to the top to prevent content from being hidden by the fixed header */
    padding-top: 70px; /* Adjust this value to match your header's height */
}

/* Header Styles */
.site-header {
    position: fixed; /* Fix the header to the top */
    top: 0;
    left: 0;
    width: 100%;
    z-index: 1000;
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 10px 30px;
    background-color: #2c3e50; /* Solid background color */
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    box-sizing: border-box; /* Important for width: 100% */
}
.site-logo {
    font-size: 1.5em;
    font-weight: 600;
    color: #ecf0f1;
    user-select: none; /* テキスト選択を無効にする */
    cursor: default;   /* カーソルがテキスト選択モードにならないようにする */
}
.main-nav ul {
    list-style: none;
    display: flex;
    gap: 25px;
    margin: 0;
    padding: 0;
}
.main-nav a {
    text-decoration: none;
    color: #bdc3c7;
    font-weight: 400;
    font-size: 1em;
    transition: color 0.3s ease;
}
.main-nav a:hover {
    color: #ffffff;
}

/* Main content area */
.scroll-container {
    /* This class is now just a semantic wrapper */
    padding: 20px; 
}

/* Main Container within the scrollable area */
.container {
    background: white;
    padding: 25px;
    border-radius: 15px;
    box-shadow: 0 15px 35px rgba(0,0,0,0.3);
    margin: 0 auto 20px auto; /* Center it horizontally */
    max-width: 1400px;
}

h1, h2, h3 {
    color: #1a2533;
    border-bottom: 2px solid #e9ecef;
    padding-bottom: 10px;
    margin-top: 20px;
}
h1 { text-align: center; }

/* Input section styles */
.input-container {
    background: #2c3e50;
    color: #ecf0f1;
    padding: 20px;
    border-radius: 10px;
    margin: 20px 0;
    border: 3px solid #3498db;
}
.input-container h3 {
    color: #ecf0f1;
    border-bottom-color: #4e6a85;
}
.char-mapping {
    display: flex;
    align-items: center;
    gap: 15px;
    margin-bottom: 15px;
    flex-wrap: wrap;
}
.char-mapping label {
    font-weight: bold;
}
.char-mapping input[type="text"] {
    width: 40px;
    height: 40px;
    font-size: 20px;
    text-align: center;
    border-radius: 5px;
    border: 1px solid #7f8c8d;
    background: #34495e;
    color: #ecf0f1;
}
.char-mapping button {
    padding: 8px 12px;
    font-size: 14px;
    color: white;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s;
}
#detectCharsButton { background: #2980b9; }
#detectCharsButton:hover { background: #3498db; }
#swapCharsButton { background: #27ae60; }
#swapCharsButton:hover { background: #2ecc71; }

#cipherInput {
    width: 100%;
    min-height: 150px;
    background: #34495e;
    color: #ecf0f1;
    border: 1px solid #7f8c8d;
    border-radius: 5px;
    padding: 10px;
    font-family: 'Courier New', monospace;
    font-size: 16px;
    line-height: 1.8;
    box-sizing: border-box;
}
#analyzeButton {
    display: block;
    width: 100%;
    padding: 12px;
    margin-top: 15px;
    font-size: 18px;
    font-weight: bold;
    color: white;
    background: #e74c3c;
    border: none;
    border-radius: 5px;
    cursor: pointer;
    transition: background 0.3s;
}
#analyzeButton:hover {
    background: #c0392b;
}
#errorMessage {
    color: #f1c40f;
    font-weight: bold;
    margin-top: 10px;
    padding: 10px;
    background: rgba(255,255,255,0.1);
    border-radius: 5px;
    min-height: 20px;
    text-align: center;
}

/* Results sections styles */
.method-header { 
    background: #17a2b8; 
    color: white; 
    padding: 10px 15px; 
    border-radius: 8px 8px 0 0; 
    margin: 20px 0 0 0; 
    font-weight: bold; 
}
.method-content { 
    background: #f8f9fa; 
    padding: 15px; 
    border-radius: 0 0 8px 8px; 
    border: 2px solid #17a2b8; 
    border-top: none; 
}
.morse-conversion { 
    font-family: 'Courier New', monospace; 
    background: #f0f0f0; 
    padding: 15px; 
    border-radius: 8px; 
    margin: 10px 0; 
    word-break: break-all; 
}
.conversion-result { 
    background: #e8f5e8; 
    padding: 15px; 
    border-radius: 10px; 
    border-left: 5px solid #28a745; 
    margin: 15px 0; 
    overflow-wrap: break-word; 
}
span.highlight { /* Make span selector more specific */
    background: #ffeb3b; 
    padding: 2px 6px; 
    border-radius: 4px; 
    font-weight: bold; 
    color: #333;
}

/* Final evaluation styles */
.final-summary {
    font-size: 1em;
    color: #155724; 
    background: #d4edda; 
    padding: 20px; 
    border-radius: 10px; 
    border: 3px solid #28a745; 
    text-align: center; 
    margin: 20px 0; 
    overflow-wrap: break-word;
}
.final-summary-title {
    font-size: 1.2em;
    font-weight: bold;
}
.final-summary-text {
    font-size: 1.4em;
    margin-top: 10px;
    font-weight: bold;
}
.analysis-note { 
    background: #e3f2fd; 
    padding: 15px; 
    border-radius: 8px; 
    border-left: 4px solid #2196f3; 
    margin: 15px 0; 
    text-align: left; 
    color: #333; /* Override parent color */
    font-weight: normal; /* Override parent weight */
}
.corrected-text {
    font-weight: bold;
    color: #0056b3;
    font-size: 1.2em;
}

/* Morse tables styles */
.morse-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(350px, 1fr));
    gap: 20px;
    margin: 20px 0;
}
.morse-card {
    background: #f8f9fa;
    padding: 20px;
    border-radius: 12px;
    border-left: 5px solid #16a085;
    overflow-x: auto;
}
.morse-table {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(60px, 1fr));
    gap: 8px;
    margin: 15px 0;
    font-size: 12px;
}
.morse-item { background: #fff; padding: 8px; border-radius: 5px; text-align: center; border: 1px solid #ddd; }