/* Trust-VPN - Modern Dark Theme CSS */
/* Создан согласно RULES.md для модернизации VPN сервиса */

/* ========== ROOT VARIABLES ========== */
:root {
    --primary-gradient: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    --secondary-gradient: linear-gradient(135deg, #f093fb 0%, #f5576c 100%);
    --success-gradient: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    --danger-gradient: linear-gradient(135deg, #fa709a 0%, #fee140 100%);
    --warning-gradient: linear-gradient(135deg, #ffecd2 0%, #fcb69f 100%);
    
    --dark-bg: #0a0e27;
    --card-bg: #1a1f3a;
    --border-color: #2d3561;
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --text-muted: #718096;
    
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 6px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px rgba(0, 0, 0, 0.1);
    --shadow-glow: 0 0 20px rgba(102, 126, 234, 0.4);
    
    --border-radius: 12px;
    --transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
}

/* ========== GLOBAL STYLES ========== */
* {
    box-sizing: border-box;
}

html {
  font-size: 14px;
    scroll-behavior: smooth;
}

@media (min-width: 768px) {
  html {
    font-size: 16px;
  }
}

body {
    background: var(--dark-bg);
    color: var(--text-primary);
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    min-height: 100vh;
    display: flex;
    flex-direction: column;
}

/* ========== BRAND STYLING ========== */
.trust-brand {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
    text-shadow: none;
    font-weight: 700;
    letter-spacing: -0.02em;
    transition: var(--transition);
}

.trust-brand:hover {
    transform: scale(1.05);
    filter: brightness(1.1);
}

/* ========== NAVIGATION ========== */
.navbar {
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
    box-shadow: var(--shadow-lg);
}

.nav-link {
    font-weight: 500;
    transition: var(--transition);
    border-radius: 8px;
    padding: 0.5rem 1rem !important;
}

.nav-link:hover {
    background: rgba(102, 126, 234, 0.1);
    color: #667eea !important;
    transform: translateY(-1px);
}

.dropdown-menu {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    -webkit-backdrop-filter: blur(10px);
    backdrop-filter: blur(10px);
}

.dropdown-item {
    color: var(--text-primary);
    transition: var(--transition);
    border-radius: 8px;
    margin: 0.25rem;
}

.dropdown-item:hover {
    background: var(--primary-gradient);
    color: white;
    transform: translateX(4px);
}

/* ========== BUTTONS ========== */
.btn {
    border-radius: var(--border-radius);
    font-weight: 600;
    padding: 0.75rem 1.5rem;
    transition: var(--transition);
    border: none;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.875rem;
}

.btn-primary {
    background: var(--primary-gradient);
    box-shadow: var(--shadow-md);
}

.btn-primary:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.btn-success {
    background: var(--success-gradient);
    box-shadow: var(--shadow-md);
}

.btn-success:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 20px rgba(79, 172, 254, 0.4);
}

.btn-danger {
    background: var(--danger-gradient);
    box-shadow: var(--shadow-md);
}

.btn-danger:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg), 0 0 20px rgba(250, 112, 154, 0.4);
}

.btn-outline-primary {
    border: 2px solid #667eea;
    color: #667eea;
    background: transparent;
}

.btn-outline-primary:hover {
    background: var(--primary-gradient);
    border-color: transparent;
    transform: translateY(-2px);
    box-shadow: var(--shadow-glow);
}

/* ========== CARDS ========== */
.card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    overflow: hidden;
}

.card:hover {
    transform: translateY(-4px);
    box-shadow: var(--shadow-lg);
    border-color: #667eea;
}

.card-header {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.1) 0%, rgba(118, 75, 162, 0.1) 100%);
    border-bottom: 1px solid var(--border-color);
    font-weight: 600;
}

.card-body {
    color: var(--text-primary);
}

/* ========== FORMS ========== */
.form-control {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-primary);
    padding: 0.75rem 1rem;
    transition: var(--transition);
}

.form-control:focus {
    background: var(--card-bg);
    border-color: #667eea;
    color: var(--text-primary);
    box-shadow: 0 0 0 0.25rem rgba(102, 126, 234, 0.25);
}

.form-control::placeholder {
    color: var(--text-muted);
}

.form-label {
    color: var(--text-secondary);
    font-weight: 500;
    margin-bottom: 0.5rem;
}

/* ========== ALERTS ========== */
.alert {
    border-radius: var(--border-radius);
    border: none;
    font-weight: 500;
    box-shadow: var(--shadow-md);
}

.alert-success {
    background: linear-gradient(135deg, rgba(79, 172, 254, 0.2) 0%, rgba(0, 242, 254, 0.2) 100%);
    color: #4facfe;
    border-left: 4px solid #4facfe;
}

.alert-danger {
    background: linear-gradient(135deg, rgba(250, 112, 154, 0.2) 0%, rgba(254, 225, 64, 0.2) 100%);
    color: #fa709a;
    border-left: 4px solid #fa709a;
}

.alert-info {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.2) 0%, rgba(118, 75, 162, 0.2) 100%);
    color: #667eea;
    border-left: 4px solid #667eea;
}

/* ========== TABLES ========== */
.table {
    color: var(--text-primary);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-md);
}

.table-dark {
    background: var(--card-bg);
}

.table-dark th {
    background: linear-gradient(135deg, rgba(102, 126, 234, 0.2) 0%, rgba(118, 75, 162, 0.2) 100%);
    border-color: var(--border-color);
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
    font-size: 0.875rem;
}

.table-dark td {
    border-color: var(--border-color);
    vertical-align: middle;
}

.table-dark tbody tr:hover {
    background: rgba(102, 126, 234, 0.1);
}

/* ========== VPN CONFIG CARDS ========== */
.vpn-config-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 1.5rem;
    margin-bottom: 1rem;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.vpn-config-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: 4px;
    background: var(--primary-gradient);
}

.vpn-config-card:hover {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
    border-color: #667eea;
}

.protocol-badge {
    padding: 0.25rem 0.75rem;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.protocol-openvpn {
    background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
    color: white;
}

.protocol-wireguard {
    background: linear-gradient(135deg, #4facfe 0%, #00f2fe 100%);
    color: white;
}

.status-active {
    color: #4facfe;
    font-weight: 600;
}

.status-expired {
    color: #fa709a;
    font-weight: 600;
}

/* ========== PRICING SECTION ========== */
.pricing-card {
    background: var(--card-bg);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 2rem;
    text-align: center;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.pricing-card::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: var(--primary-gradient);
    opacity: 0;
    transition: var(--transition);
    transform: rotate(45deg);
    z-index: -1;
}

.pricing-card:hover::before {
    opacity: 0.1;
}

.pricing-card:hover {
    transform: translateY(-8px);
    border-color: #667eea;
    box-shadow: var(--shadow-lg), var(--shadow-glow);
}

.popular-card {
  position: relative;
    transform: scale(1.05);
}

.popular-badge {
    position: absolute;
    top: 1rem;
    right: 1rem;
    z-index: 10;
}

.popular-badge .badge {
    font-size: 0.75rem;
    padding: 0.5rem 1rem;
    border-radius: 20px;
    box-shadow: var(--shadow-md);
}

.protocol-info {
    background: rgba(102, 126, 234, 0.1);
    border-radius: var(--border-radius);
    padding: 1rem;
    margin: 1rem 0;
}

.price {
    font-size: 2.5rem;
    font-weight: 700;
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

/* ========== FOOTER ========== */
footer {
    margin-top: auto;
    background: linear-gradient(135deg, #0a0e27 0%, #1a1f3a 100%);
}

/* ========== ANIMATIONS ========== */
@keyframes spin {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

.spin {
    animation: spin 1s linear infinite;
}

@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(30px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.fade-in-up {
    animation: fadeInUp 0.6s ease-out;
}

@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.pulse {
    animation: pulse 2s infinite;
}

/* ========== RESPONSIVE DESIGN ========== */
@media (max-width: 768px) {
    .trust-brand {
        font-size: 1.5rem !important;
    }
    
    .pricing-card {
        margin-bottom: 1rem;
    }
    
    .btn {
        width: 100%;
        margin-bottom: 0.5rem;
    }
    
    .vpn-config-card {
        padding: 1rem;
    }
}

/* ========== UTILITIES ========== */
.text-gradient {
    background: var(--primary-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.shadow-glow {
    box-shadow: var(--shadow-glow);
}

.border-gradient {
    border: 2px solid transparent;
    background: linear-gradient(var(--card-bg), var(--card-bg)) padding-box,
                var(--primary-gradient) border-box;
}

/* ========== FOCUS STYLES ========== */
.btn:focus, 
.btn:active:focus, 
.btn-link.nav-link:focus, 
.form-control:focus, 
.form-check-input:focus {
    box-shadow: 0 0 0 0.25rem rgba(102, 126, 234, 0.25);
}

/* ========== SCROLLBAR STYLING ========== */
::-webkit-scrollbar {
    width: 8px;
}

::-webkit-scrollbar-track {
    background: var(--dark-bg);
}

::-webkit-scrollbar-thumb {
    background: var(--primary-gradient);
    border-radius: 4px;
}

::-webkit-scrollbar-thumb:hover {
    background: linear-gradient(135deg, #5a6fd8 0%, #6a5acd 100%);
}