:root {
    --primary-color: #2c3e50;
    --accent-color: #3498db;
    --text-color: #333;
    --light-color: #f5f5f5;
    --background-color: #f9f9f9;
}

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

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--text-color);
    background-color: var(--background-color);
}

.container {
    max-width: 1100px;
    margin: 0 auto;
    padding: 0 20px;
}

header {
    background-color: var(--primary-color);
    color: #fff;
    padding: 2rem 0;
    text-align: center;
}

header h1 {
    font-size: 3rem;
    margin-bottom: 0.5rem;
}

main {
    padding: 2rem 0;
}

section {
    margin-bottom: 2rem;
    padding: 1.5rem;
    background-color: #fff;
    border-radius: 5px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.1);
}

h2 {
    color: var(--primary-color);
    margin-bottom: 1rem;
    padding-bottom: 0.5rem;
    border-bottom: 2px solid var(--accent-color);
}

ul {
    list-style-position: inside;
    margin-left: 1rem;
}

a {
    color: var(--accent-color);
    text-decoration: none;
}

a:hover {
    text-decoration: underline;
}

footer {
    background-color: var(--primary-color);
    color: #fff;
    text-align: center;
    padding: 1rem 0;
    margin-top: 2rem;
}

/* Bilingual content styles */
.bilingual {
    display: flex;
    flex-direction: column;
    gap: 0.5rem;
}

.bilingual p {
    margin-bottom: 0.5rem;
}

.bilingual .zh {
    color: #555;
    font-size: 0.95em;
    border-left: 3px solid var(--accent-color);
    padding-left: 10px;
    margin-top: 5px;
}

/* Notice styles */
.notice {
    background-color: #fcf8e3;
    border-left: 4px solid #f0ad4e;
    padding: 1rem;
    margin-bottom: 2rem;
    border-radius: 3px;
}

.notice .bilingual p {
    margin-bottom: 0.5rem;
}

.notice a {
    font-weight: bold;
}

/* Responsive design */
@media (max-width: 768px) {
    .container {
        padding: 0 15px;
    }
    
    header h1 {
        font-size: 2.5rem;
    }
}

/* QSL card table styles */
.qsl-table {
    overflow-x: auto;
    margin-top: 1rem;
}

.qsl-table table {
    width: 100%;
    border-collapse: collapse;
    min-width: 800px;
}

.qsl-table th, 
.qsl-table td {
    padding: 0.75rem;
    border: 1px solid #ddd;
    text-align: left;
    font-size: 0.95rem;
}

.qsl-table th {
    background-color: var(--primary-color);
    color: white;
    font-weight: bold;
}

.qsl-table tr:nth-child(even) {
    background-color: #f2f2f2;
}

.qsl-table tr:hover {
    background-color: #e9e9e9;
}

/* Green checkmark styles */
.qsl-table .checkmark {
    width: 30px;
    text-align: center;
    color: #2ecc71;
    font-size: 1.1rem;
    padding: 0.75rem 0;
}

/* The following selector may not be compatible with some versions of Safari
.qsl-table td:first-child:has(✅) {
    padding-left: 0.5rem;
}
*/

.qsl-table th:first-child {
    width: 30px;
    padding: 0.75rem 0;
}

/* Media queries */
@media (max-width: 768px) {
    .qsl-table {
        font-size: 0.8rem;
    }
    
    .qsl-table th, 
    .qsl-table td {
        padding: 0.5rem 0.4rem;
    }
}

/* QSL Card Section */
.qsl-images {
    width: 100%;
    max-width: 1000px;
    margin: 2rem auto;
    text-align: center;
    font-size: 0;
}

.qsl-images figure {
    display: inline-block;
    vertical-align: top;
    width: calc(50% - 1rem);
    max-width: 450px;
    margin: 0.5rem;
    font-size: 1rem;
}

.qsl-image {
    display: block;
    width: 100%;
    height: auto;
    margin: 0 auto;
    border-radius: 8px;
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.1);
}

.qsl-images figcaption {
    margin-top: 1rem;
    color: #666;
    font-size: 0.9rem;
}

@media (max-width: 768px) {
    .qsl-images figure {
        width: 100%;
        max-width: 360px;
        margin: 1rem auto;
    }
    
    .qsl-image {
        max-width: 360px;
    }
}

/* QRZ Logbook Section */
#logbook-container {
    margin: 2rem 0;
}

.logbook-stats {
    background-color: #f8f8f8;
    border-radius: 8px;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.05);
}

/* Statistics Grid Layout */
.stats-grid {
    display: grid;
    grid-template-columns: repeat(4, 1fr);
    gap: 15px;
    text-align: center;
}

.stats-item {
    padding: 15px 10px;
    background-color: white;
    border-radius: 8px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stats-item:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

.stats-value {
    font-size: 1.8rem;
    font-weight: bold;
    color: #4472C4;
    margin-bottom: 8px;
}

.stats-label {
    font-size: 0.9rem;
    color: #555;
}

.stats-label span {
    display: block;
    line-height: 1.4;
}

/* For mobile screens */
@media (max-width: 768px) {
    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
        gap: 12px;
    }
    
    .stats-item {
        padding: 12px 8px;
    }
    
    .stats-value {
        font-size: 1.5rem;
        margin-bottom: 5px;
    }
}

#qso-table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.9rem;
}

#qso-table th {
    background-color: #334455;
    color: white;
    text-align: left;
    padding: 0.75rem;
}

#qso-table td {
    padding: 0.75rem;
    border-bottom: 1px solid #eee;
}

#qso-table tr:hover {
    background-color: #f5f5f5;
}

.loading-data {
    text-align: center;
    padding: 2rem 0 !important;
    color: #999;
}

.confirmed {
    color: #4CAF50;
    font-weight: bold;
}

.unconfirmed {
    color: #FF9800;
}

/* QRZ Logbook Form */
.qso-form {
    background-color: #f8f8f8;
    border-radius: 8px;
    padding: 1.5rem;
    margin: 2rem 0;
}

.qso-form h3 {
    margin-top: 0;
    margin-bottom: 1.5rem;
}

.form-row {
    display: flex;
    flex-wrap: wrap;
    margin-bottom: 1rem;
    gap: 1rem;
}

.form-group {
    flex: 1 1 200px;
}

.form-group label {
    display: block;
    margin-bottom: 0.5rem;
    font-weight: bold;
}

.form-group input, 
.form-group select {
    width: 100%;
    padding: 0.5rem;
    border: 1px solid #ddd;
    border-radius: 4px;
}

.form-submit {
    margin-top: 1.5rem;
}

.btn {
    background-color: #334455;
    color: white;
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    cursor: pointer;
    font-size: 1rem;
}

.btn:hover {
    background-color: #445566;
}

/* Success Message */
.success-message {
    background-color: #dff0d8;
    color: #3c763d;
    border: 1px solid #d6e9c6;
    border-radius: 4px;
    padding: 1rem;
    margin-bottom: 1.5rem;
    opacity: 1;
    transition: opacity 0.5s ease;
}

.success-message p {
    margin: 0;
}

/* Error Message Styles */
.error-message {
    background-color: #f8d7da;
    color: #721c24;
    border: 1px solid #f5c6cb;
    border-radius: 4px;
    padding: 1rem;
    margin: 1rem 0;
    text-align: center;
}

.reload-btn {
    background-color: #334455;
    color: white;
    border: none;
    padding: 0.5rem 1rem;
    border-radius: 4px;
    cursor: pointer;
    margin-top: 0.5rem;
    font-size: 0.9rem;
}

.reload-btn:hover {
    background-color: #445566;
}

/* Subscription Notice Styles */
.subscription-notice {
    text-align: center;
    padding: 2rem 0 !important;
    color: #666;
    background-color: #f9f9f9;
}

.load-btn {
    background-color: #3498db;
    color: rgb(225, 218, 218);
    border: none;
    padding: 0.75rem 1.5rem;
    border-radius: 4px;
    cursor: pointer;
    margin-top: 1rem;
    font-size: 0.9rem;
    transition: background-color 0.3s ease;
    display: block;
    margin: 1rem auto;
}

.load-btn:hover {
    background-color: #2980b9;
}

.load-btn span {
    display: block;
}

.load-btn span.zh {
    font-size: 0.8rem;
    margin-top: 0.2rem;
    color: rgba(255, 255, 255, 0.9);
}

/* Record count */
.record-count {
    margin-top: 20px;
    text-align: center;
    color: #666;
    font-size: 0.9em;
    background-color: #f8f8f8;
    padding: 12px 15px;
    border-radius: 6px;
    box-shadow: 0 1px 3px rgba(0,0,0,0.05);
    border: 1px solid #eee;
}

.record-count .bilingual p {
    margin: 3px 0;
}

/* Search box styles */
.search-container {
    margin-bottom: 1.5rem;
    padding: 20px;
    background-color: #f0f5ff;
    border-radius: 10px;
    box-shadow: 0 3px 10px rgba(0,0,0,0.08);
    border: 1px solid #e6eeff;
}

.search-container .bilingual.note {
    text-align: center;
    margin-bottom: 12px;
    color: #666;
    font-size: 0.85em;
}

.search-container .bilingual.note p {
    margin: 2px 0;
}

.search-box {
    display: flex;
    align-items: center;
    gap: 12px;
    max-width: 600px;
    margin: 0 auto;
}

.search-box input {
    flex: 1;
    padding: 14px 18px;
    border: 1px solid #ddd;
    border-radius: 6px;
    font-size: 1rem;
    box-shadow: inset 0 1px 3px rgba(0,0,0,0.1);
    transition: all 0.3s ease;
}

.search-box input:focus {
    border-color: #4472C4;
    outline: none;
    box-shadow: 0 0 0 3px rgba(68, 114, 196, 0.2);
}

.search-box input::placeholder {
    color: #999;
    font-style: italic;
}

.search-box button {
    padding: 14px 22px;
    background: linear-gradient(to bottom, #445577, #334455);
    color: white;
    border: none;
    border-radius: 6px;
    cursor: pointer;
    font-size: 1rem;
    font-weight: 500;
    transition: all 0.3s ease;
    min-width: 110px;
    letter-spacing: 0.5px;
    box-shadow: 0 2px 4px rgba(0,0,0,0.15);
}

.search-box button:hover {
    background: linear-gradient(to bottom, #556688, #445577);
    transform: translateY(-2px);
    box-shadow: 0 4px 8px rgba(0,0,0,0.15);
}

#search-button {
    background: linear-gradient(to bottom, #4472C4, #3a62ac);
}

#search-button:hover {
    background: linear-gradient(to bottom, #5583d5, #4472C4);
}

#reset-button {
    background: linear-gradient(to bottom, #808a97, #6c757d);
}

#reset-button:hover {
    background: linear-gradient(to bottom, #919ca9, #808a97);
}

@media (max-width: 600px) {
    .search-box {
        flex-direction: column;
        align-items: stretch;
        gap: 12px;
    }
    
    .search-box input,
    .search-box button {
        width: 100%;
    }
    
    .search-container {
        padding: 12px;
    }
}

/* Single Statistic Display */
.stats-single {
    text-align: center;
    padding: 20px;
    background-color: white;
    border-radius: 10px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.08);
    max-width: 200px;
    margin: 0 auto;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
}

.stats-single:hover {
    transform: translateY(-5px);
    box-shadow: 0 5px 15px rgba(0, 0, 0, 0.1);
}

/* Equipment List */
.equipment-list {
    list-style: none;
    padding-left: 0;
    margin-top: 1rem;
}

.equipment-list li {
    background-color: #f8f8f8;
    border-radius: 6px;
    padding: 15px 20px;
    margin-bottom: 15px;
    border-left: 4px solid var(--primary-color);
    box-shadow: 0 2px 4px rgba(0,0,0,0.05);
}

.equipment-list li .bilingual p {
    margin: 5px 0;
}

.equipment-list li .bilingual.note p {
    color: #666;
    font-size: 0.85em;
    margin-top: 8px;
    line-height: 1.4;
}