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

:root {
    --primary-color: #0088cc;
    --primary-hover: #006699;
    --secondary-color: #54a9eb;
    --success-color: #4caf50;
    --danger-color: #f44336;
    --warning-color: #ff9800;
    --dark-bg: #1a1a2e;
    --card-bg: #ffffff;
    --text-primary: #333333;
    --text-secondary: #666666;
    --border-color: #e0e0e0;
    --shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
    --shadow-hover: 0 4px 20px rgba(0, 0, 0, 0.15);
    --border-radius: 12px;
    --transition: all 0.3s ease;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Helvetica Neue', Arial, sans-serif;
    line-height: 1.6;
    color: var(--text-primary);
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    min-height: 100vh;
}

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

/* ===== Language Selector ===== */
.language-selector {
    position: sticky;
    top: 0;
    background: rgba(255, 255, 255, 0.95);
    backdrop-filter: blur(10px);
    padding: 15px 0;
    box-shadow: var(--shadow);
    z-index: 1000;
    overflow-x: auto;
    white-space: nowrap;
    text-align: center;
}

.language-selector::-webkit-scrollbar {
    height: 6px;
}

.language-selector::-webkit-scrollbar-thumb {
    background: var(--primary-color);
    border-radius: 3px;
}

.lang-btn {
    background: white;
    border: 2px solid var(--border-color);
    padding: 8px 16px;
    margin: 0 5px;
    border-radius: 20px;
    cursor: pointer;
    font-size: 14px;
    transition: var(--transition);
    display: inline-block;
}

.lang-btn:hover {
    border-color: var(--primary-color);
    transform: translateY(-2px);
}

.lang-btn.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
}

/* ===== Header ===== */
.header {
    background: linear-gradient(135deg, var(--primary-color) 0%, var(--secondary-color) 100%);
    color: white;
    padding: 60px 0;
    text-align: center;
    box-shadow: var(--shadow);
}

.logo {
    font-size: 3rem;
    font-weight: 700;
    margin-bottom: 15px;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: 15px;
}

.logo .icon {
    font-size: 3.5rem;
    animation: pulse 2s infinite;
}

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

.subtitle {
    font-size: 1.3rem;
    opacity: 0.95;
    font-weight: 300;
}

/* ===== Main Content ===== */
.main {
    background: white;
    margin: -30px 20px 30px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-hover);
    padding: 40px 0;
}

.section-title {
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: 30px;
    text-align: center;
    position: relative;
    padding-bottom: 15px;
}

.section-title::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--primary-color);
    border-radius: 2px;
}

/* ===== Info Section ===== */
.info-section {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-bottom: 50px;
    padding: 0 20px;
}

.info-card {
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    padding: 30px;
    border-radius: var(--border-radius);
    text-align: center;
    transition: var(--transition);
    border: 2px solid transparent;
}

.info-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-color);
}

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

.info-card h3 {
    font-size: 1.3rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.info-card p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

/* ===== Proxy Section ===== */
.proxy-section {
    padding: 40px 20px;
}

.update-time {
    text-align: center;
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: 30px;
}

.proxy-filters {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
    background: #f7f9fc;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 14px 16px;
    margin-bottom: 20px;
}

.proxy-filters .filter-group {
    display: flex;
    align-items: center;
    gap: 10px;
}

.proxy-filters label {
    font-weight: 600;
    color: var(--text-primary);
}

.proxy-filters select {
    min-width: 200px;
    padding: 10px 12px;
    border: 1px solid var(--border-color);
    border-radius: 8px;
    background: white;
    font-size: 0.95rem;
    color: var(--text-primary);
}

.proxy-filter-hint {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.location-quick {
    display: flex;
    flex-direction: column;
    gap: 8px;
    flex: 1;
    min-width: 260px;
}

.location-chip-list {
    display: flex;
    gap: 10px;
    flex-wrap: wrap;
}

.location-chip {
    background: white;
    border: 1px solid var(--border-color);
    border-radius: 18px;
    padding: 8px 12px;
    display: inline-flex;
    align-items: center;
    gap: 8px;
    cursor: pointer;
    transition: var(--transition);
    color: var(--text-primary);
    font-weight: 600;
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.04);
}

.location-chip:hover {
    transform: translateY(-2px);
    border-color: var(--primary-color);
}

.location-chip.active {
    background: var(--primary-color);
    color: white;
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.location-chip .chip-label {
    white-space: nowrap;
}

.location-chip .chip-count {
    background: #f7f9fc;
    color: var(--primary-color);
    border-radius: 12px;
    padding: 2px 8px;
    font-size: 0.85rem;
    font-weight: 700;
}

.location-chip.active .chip-count {
    background: rgba(255, 255, 255, 0.2);
    color: white;
}

.proxy-empty {
    grid-column: 1 / -1;
    text-align: center;
    padding: 30px;
    background: white;
    border: 2px dashed var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-secondary);
}

.proxy-list {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
    gap: 20px;
}

.proxy-card {
    background: white;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 25px;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.proxy-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
    background: linear-gradient(90deg, var(--primary-color), var(--secondary-color));
}

.proxy-card:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
    border-color: var(--primary-color);
}

.proxy-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 15px;
}

.proxy-location {
    font-size: 1.2rem;
    font-weight: 600;
    color: var(--text-primary);
}

.proxy-flag {
    font-size: 1.5rem;
}

.proxy-status {
    display: inline-block;
    padding: 4px 12px;
    border-radius: 15px;
    font-size: 0.85rem;
    font-weight: 600;
}

.status-online {
    background: #e8f5e9;
    color: var(--success-color);
}

.status-slow {
    background: #fff3e0;
    color: var(--warning-color);
}

.status-offline {
    background: #ffebee;
    color: var(--danger-color);
}

.proxy-info {
    margin: 15px 0;
}

.proxy-info-item {
    display: flex;
    justify-content: space-between;
    margin: 8px 0;
    font-size: 0.9rem;
}

.proxy-info-label {
    color: var(--text-secondary);
}

.proxy-info-value {
    color: var(--text-primary);
    font-weight: 500;
}

.proxy-actions {
    display: flex;
    gap: 10px;
    margin-top: 20px;
}

.btn {
    flex: 1;
    padding: 12px 20px;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: var(--transition);
    text-decoration: none;
    text-align: center;
    display: inline-block;
}

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

.btn-primary:hover {
    background: var(--primary-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 136, 204, 0.3);
}

.btn-secondary {
    background: white;
    color: var(--primary-color);
    border: 2px solid var(--primary-color);
}

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

/* ===== Tutorial Section ===== */
/* .tutorial-section {
    padding: 40px 20px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    margin: 40px 0;
} */

#tutorial-section {
    padding: 40px 20px;
    background: linear-gradient(135deg, #f5f7fa 0%, #c3cfe2 100%);
    margin: 40px 0;
}

.tutorial-steps {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(250px, 1fr));
    gap: 25px;
    margin-bottom: 40px;
}

.step {
    background: white;
    padding: 30px;
    border-radius: var(--border-radius);
    text-align: center;
    box-shadow: var(--shadow);
    transition: var(--transition);
}

.step:hover {
    transform: translateY(-5px);
    box-shadow: var(--shadow-hover);
}

.step-number {
    width: 50px;
    height: 50px;
    background: var(--primary-color);
    color: white;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    font-weight: 700;
    margin: 0 auto 20px;
}

.step h3 {
    font-size: 1.2rem;
    margin-bottom: 10px;
    color: var(--text-primary);
}

.step p {
    color: var(--text-secondary);
    font-size: 0.95rem;
}

.platform-guides {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: 25px;
}

.guide {
    background: white;
    padding: 25px;
    border-radius: var(--border-radius);
    box-shadow: var(--shadow);
}

.guide h4 {
    font-size: 1.3rem;
    margin-bottom: 15px;
    color: var(--text-primary);
}

.guide ol {
    padding-left: 20px;
}

.guide li {
    margin: 10px 0;
    color: var(--text-secondary);
    line-height: 1.6;
}

/* ===== FAQ Section ===== */
.faq-section {
    padding: 40px 20px;
}

.faq-list {
    max-width: 800px;
    margin: 0 auto;
}

.faq-item {
    background: white;
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 25px;
    margin-bottom: 20px;
    transition: var(--transition);
}

.faq-item:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow);
}

.faq-item h3 {
    color: var(--primary-color);
    font-size: 1.2rem;
    margin-bottom: 12px;
}

.faq-item p {
    color: var(--text-secondary);
    line-height: 1.8;
}

/* ===== Footer ===== */
.footer {
    background: var(--dark-bg);
    color: white;
    padding: 40px 0;
    text-align: center;
}

.footer p {
    margin: 10px 0;
    opacity: 0.9;
}

.footer-links {
    margin: 20px 0;
}

.footer-links a {
    color: white;
    text-decoration: none;
    margin: 0 15px;
    opacity: 0.8;
    transition: var(--transition);
}

.footer-links a:hover {
    opacity: 1;
    color: var(--secondary-color);
}

.copyright {
    font-size: 0.9rem;
    opacity: 0.7;
}

/* ===== RTL Support for Persian/Arabic ===== */
[dir="rtl"] {
    direction: rtl;
}

[dir="rtl"] .proxy-info-item {
    flex-direction: row-reverse;
}

[dir="rtl"] .guide ol {
    padding-right: 20px;
    padding-left: 0;
}

/* ===== Responsive Design ===== */
@media (max-width: 768px) {
    .logo {
        font-size: 2rem;
    }
    
    .logo .icon {
        font-size: 2.5rem;
    }
    
    .subtitle {
        font-size: 1rem;
    }
    
    .section-title {
        font-size: 1.5rem;
    }
    
    .info-section {
        grid-template-columns: 1fr;
    }
    
    .proxy-list {
        grid-template-columns: 1fr;
    }
    
    .tutorial-steps {
        grid-template-columns: 1fr;
    }
    
    .platform-guides {
        grid-template-columns: 1fr;
    }
    
    .main {
        margin: -20px 10px 20px;
    }
    
    .language-selector {
        padding: 10px 0;
    }
    
    .lang-btn {
        font-size: 12px;
        padding: 6px 12px;
    }
}

@media (max-width: 480px) {
    .proxy-actions {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
    }
}

/* ===== Loading Animation ===== */
@keyframes shimmer {
    0% {
        background-position: -1000px 0;
    }
    100% {
        background-position: 1000px 0;
    }
}

.loading {
    animation: shimmer 2s infinite;
    background: linear-gradient(to right, #f6f7f8 0%, #edeef1 20%, #f6f7f8 40%, #f6f7f8 100%);
    background-size: 1000px 100%;
}

/* ===== Smooth Scroll ===== */
html {
    scroll-behavior: smooth;
}

/* ===== Selection ===== */
::selection {
    background: var(--primary-color);
    color: white;
}

::-moz-selection {
    background: var(--primary-color);
    color: white;
}