/* Общие стили */
:root {
    --bg-color: #121212; 
    --bg-color-lighter: #1a1a1a;
    --surface-color: #1E1E1E; 
    --surface-color-translucent: rgba(30, 30, 30, 0.85); /* For modal glassmorphism */
    --primary-text-color: #EAEAEA; 
    --secondary-text-color: #A0A0A0; 
    --accent-color: #007BFF; 
    --accent-color-hover: #0056b3; 
    --danger-color: #dc3545; 
    --danger-color-hover: #c82333;
    --border-color: #333333; 
    --card-border-radius: 10px; /* Slightly more rounded */
    --button-border-radius: 8px; /* Slightly more rounded */
    --shadow-color-light: rgba(0, 123, 255, 0.2);
    --shadow-color-dark: rgba(0, 0, 0, 0.25);
}

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

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    line-height: 1.6;
    color: var(--primary-text-color);
    background: linear-gradient(270deg, var(--bg-color), var(--bg-color-lighter), var(--bg-color));
    background-size: 400% 400%;
    animation: subtleGradient 30s ease infinite;
    min-height: 100vh;
    overflow-x: hidden;
}

@keyframes subtleGradient {
    0% { background-position: 0% 50%; }
    50% { background-position: 100% 50%; }
    100% { background-position: 0% 50%; }
}

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

/* Универсальные стили для кнопок */
.btn {
    padding: 0.8rem 1.6rem; /* Slightly larger padding */
    border-radius: var(--button-border-radius);
    font-weight: bold;
    cursor: pointer;
    transition: background-color 0.25s ease, transform 0.15s ease, box-shadow 0.25s ease;
    border: none;
    text-decoration: none;
    display: inline-block;
    text-align: center;
    letter-spacing: 0.5px;
}

.btn-primary {
    background-color: var(--accent-color);
    color: white;
    box-shadow: 0 2px 8px var(--shadow-color-light);
}
.btn-primary:hover {
    background-color: var(--accent-color-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px var(--shadow-color-light);
}
.btn-primary:active {
    transform: translateY(0px);
    box-shadow: 0 1px 4px var(--shadow-color-light);
}
.btn-primary:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 3px;
}

.btn-secondary {
    background-color: var(--surface-color);
    color: var(--primary-text-color);
    border: 1px solid var(--border-color);
}
.btn-secondary:hover {
    background-color: #2a2a2a; 
    border-color: var(--accent-color);
    transform: translateY(-2px);
    box-shadow: 0 4px 10px var(--shadow-color-dark);
}
.btn-secondary:active {
    transform: translateY(0px);
    box-shadow: 0 1px 3px var(--shadow-color-dark);
}
.btn-secondary:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 3px;
}

.btn-danger {
    background-color: var(--danger-color);
    color: white;
    box-shadow: 0 2px 8px rgba(220, 53, 69, 0.2);
}
.btn-danger:hover {
    background-color: var(--danger-color-hover);
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(220, 53, 69, 0.3);
}
.btn-danger:active {
    transform: translateY(0px);
    box-shadow: 0 1px 4px rgba(220, 53, 69, 0.2);
}
.btn-danger:focus-visible {
    outline: 2px solid var(--danger-color);
    outline-offset: 3px;
}


/* Header */
.header {
    background: var(--surface-color);
    position: fixed;
    top: 0;
    width: 100%;
    z-index: 1000;
    border-bottom: 1px solid var(--border-color);
    transition: opacity 0.3s ease-in-out, box-shadow 0.3s ease;
    padding: 0.75rem 0;
    box-shadow: 0 2px 10px rgba(0,0,0,0.15);
}

.header .container {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo h1 {
    color: var(--primary-text-color);
    font-size: 1.6rem; /* Slightly larger */
    font-weight: bold;
}

.nav {
    display: flex;
    align-items: center;
    gap: 1rem; /* Reduced gap */
}

.nav-link {
    color: var(--secondary-text-color);
    text-decoration: none;
    padding: 0.6rem 1.1rem; /* Adjusted padding */
    border-radius: var(--button-border-radius);
    transition: all 0.25s ease;
    position: relative;
}
.nav-link::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 0;
    height: 2px;
    background: var(--accent-color);
    transition: width 0.3s ease;
}

.nav-link:hover,
.nav-link.active {
    color: var(--primary-text-color);
    background-color: rgba(255, 255, 255, 0.05); /* More subtle hover */
}
.nav-link:hover::after,
.nav-link.active::after {
    width: 70%; /* Underline width */
}
.nav-link.active {
    font-weight: 500;
}
.nav-link:focus-visible {
    outline: 2px solid var(--accent-color);
    outline-offset: 2px;
    background-color: rgba(255, 255, 255, 0.08);
}

/* Custom class for secret button if it needs specific padding/margin different from .btn-secondary */
.secret-btn-custom {
    padding: 0.6rem 1.1rem; /* Example: match nav-link padding */
}


/* Main Content */
.main {
    margin-top: 80px; /* Adjusted for potentially taller header */
    transition: opacity 0.3s ease-in-out;
}

/* Hero Section */
.hero {
    padding: 90px 0;
    text-align: center;
    background-color: transparent; /* Will inherit body's animated gradient */
    position: relative; /* For potential overlays if needed */
}

.hero-content {
    max-width: 750px;
    margin: 0 auto;
}

.hero-title {
    font-size: 3rem; /* Slightly larger */
    color: var(--primary-text-color);
    margin-bottom: 1.2rem;
    font-weight: 600;
    text-shadow: 0 2px 4px rgba(0,0,0,0.3);
}

.hero-subtitle {
    font-size: 1.15rem;
    color: var(--secondary-text-color);
    margin-bottom: 2.5rem;
}

.cta-btn { 
    font-size: 1.15rem;
    padding: 1rem 2rem;
}


/* Providers Section */
.providers, .about {
    padding: 70px 0;
    background-color: var(--surface-color); 
}
.about {
    background-color: var(--bg-color); /* Or transparent to use body gradient */
}

.section-title {
    text-align: center;
    font-size: 2.4rem;
    color: var(--primary-text-color);
    margin-bottom: 3rem;
    font-weight: 600;
}

.providers-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr)); /* Slightly larger minmax */
    gap: 2rem;
    margin-top: 2rem;
}

.provider-card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--card-border-radius);
    padding: 1.8rem; /* Increased padding */
    text-align: center;
    transition: all 0.3s ease;
    box-shadow: 0 5px 15px var(--shadow-color-dark);
}

.provider-card:hover {
    transform: translateY(-8px); /* More lift */
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.35);
    border-color: var(--accent-color);
}

.provider-icon {
    font-size: 2.8rem; /* Larger icon */
    margin-bottom: 1rem;
    color: var(--accent-color);
}

.provider-card h3 {
    color: var(--primary-text-color);
    font-size: 1.4rem;
    margin-bottom: 0.75rem;
    font-weight: 500;
}

.provider-card p {
    color: var(--secondary-text-color);
    margin-bottom: 1.2rem;
    font-size: 0.95rem;
}

.provider-rating {
    margin-bottom: 1.5rem;
    font-size: 1rem;
    color: var(--secondary-text-color);
}

.provider-btn { 
    padding: 0.7rem 1.4rem;
    font-size: 0.95rem;
}


/* About Section */
.about-content {
    max-width: 800px;
    margin: 0 auto;
    text-align: center;
}
.about-content p {
    color: var(--secondary-text-color);
    font-size: 1.1rem;
    margin-bottom: 1.5rem;
    line-height: 1.8;
}

/* Modal Styles */
.modal {
    display: none;
    position: fixed;
    z-index: 2000;
    left: 0;
    top: 0;
    width: 100%;
    height: 100%;
    background-color: rgba(0, 0, 0, 0.7); /* Slightly less dark overlay */
    backdrop-filter: blur(5px);
    -webkit-backdrop-filter: blur(5px);
    overflow-y: auto;
    opacity: 0;
    transform: scale(0.98);
    transition: opacity 0.3s ease-out, transform 0.3s ease-out;
}
.modal.visible {
    opacity: 1;
    transform: scale(1);
}

.modal-content {
    background: var(--surface-color-translucent); /* Frosted glass effect */
    margin: 8vh auto; /* Adjusted margin */
    padding: 2.5rem; /* Increased padding */
    border-radius: var(--card-border-radius);
    width: 90%;
    max-width: 500px; /* Slightly wider default modal */
    position: relative;
    box-shadow: 0 15px 35px rgba(0, 0, 0, 0.5);
    border: 1px solid var(--border-color);
}
.provider-detail-modal .modal-content {
    max-width: 700px; /* Wider for provider details */
}

.close {
    color: var(--secondary-text-color);
    position: absolute; /* Position explicitly */
    top: 1rem;
    right: 1rem;
    font-size: 28px;
    font-weight: bold;
    cursor: pointer;
    line-height: 1;
    padding: 0.5rem; /* Larger click area */
    border-radius: 50%;
    transition: color 0.2s, background-color 0.2s;
}
.close:hover, .close:focus {
    color: var(--primary-text-color);
    background-color: rgba(255,255,255,0.1);
    outline: none;
}
.close:focus-visible {
    outline: 2px solid var(--accent-color);
}

.modal-content h2, .modal-title-text {
    color: var(--primary-text-color);
    text-align: center;
    margin-bottom: 2rem;
    font-weight: 500;
    font-size: 1.5rem;
}

.form-group {
    margin-bottom: 1.5rem;
}
.form-group label {
    display: block;
    color: var(--primary-text-color);
    margin-bottom: 0.5rem;
    font-weight: 500;
    font-size: 0.95rem;
}
.form-group input {
    width: 100%;
    padding: 0.85rem;
    border: 1px solid var(--border-color);
    border-radius: var(--button-border-radius);
    background: #282828; 
    color: var(--primary-text-color);
    font-size: 1rem;
    transition: border-color 0.2s, box-shadow 0.2s;
}
.form-group input::placeholder {
    color: var(--secondary-text-color);
}
.form-group input:focus {
    outline: none;
    border-color: var(--accent-color);
    background: #2c2c2c;
    box-shadow: 0 0 0 3px var(--shadow-color-light);
}

.login-btn { 
    width: 100%;
    font-size: 1.1rem;
    margin-top: 0.5rem; /* Add some space above button */
}
.login-btn:disabled {
    opacity: 0.6;
    cursor: wait;
    background-color: var(--accent-color-hover); 
}

.error-message {
    color: #f8d7da; 
    background-color: rgba(220, 53, 69, 0.25); 
    border: 1px solid var(--danger-color);
    padding: 0.8rem;
    border-radius: var(--button-border-radius);
    text-align: center;
    margin-top: 1.2rem;
    font-weight: 500;
    font-size: 0.95rem;
    display: none;
}

/* Secret Content */
.secret-content {
    display: none;
    padding: 70px 0;
    background: transparent; /* Use body gradient */
    min-height: 100vh;
    transition: opacity 0.5s ease-in-out;
}

.secret-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 3rem;
    padding-bottom: 1.5rem;
    border-bottom: 1px solid var(--border-color);
}
.secret-header h2 {
    color: var(--accent-color);
    font-size: 2.2rem;
    font-weight: 600;
}
.logout-btn { 
    padding: 0.7rem 1.4rem;
}

.secret-cards {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(340px, 1fr)); /* Wider cards */
    gap: 2rem;
}

.secret-card {
    background: var(--surface-color);
    border: 1px solid var(--border-color);
    border-radius: var(--card-border-radius);
    padding: 1.8rem;
    transition: all 0.3s ease;
    color: var(--primary-text-color);
    box-shadow: 0 5px 15px var(--shadow-color-dark);
}
.secret-card:hover {
    transform: translateY(-8px);
    box-shadow: 0 12px 25px rgba(0, 0, 0, 0.35);
    border-color: var(--accent-color);
}
.secret-card h4 {
    color: var(--accent-color);
    font-size: 1.3rem;
    margin-bottom: 1rem;
    font-weight: 500;
}
.secret-card p {
    color: var(--secondary-text-color);
    margin-bottom: 1.2rem;
    font-size: 0.95rem;
}
.secret-card ul {
    list-style: none;
    padding-left: 0;
}
.secret-card li {
    padding: 0.7rem 0;
    padding-left: 1.8rem;
    position: relative;
    border-bottom: 1px solid #2b2b2b; /* Lighter border inside card */
    font-size: 0.95rem;
    color: var(--secondary-text-color);
}
.secret-card li:last-child {
    border-bottom: none;
}
.secret-card li::before {
    content: "▸";
    position: absolute;
    left: 0.2rem;
    color: var(--accent-color);
    font-size: 1.3em;
    line-height: 1;
}
.secret-card li strong {
    color: var(--primary-text-color);
    font-weight: 500;
}
.secret-card li a {
    color: var(--accent-color);
    text-decoration: none;
}
.secret-card li a:hover {
    text-decoration: underline;
    color: var(--accent-color-hover);
}


/* Footer */
.footer {
    background: var(--surface-color);
    text-align: center;
    padding: 2rem 0; /* Increased padding */
    color: var(--secondary-text-color);
    transition: opacity 0.3s ease-in-out;
    border-top: 1px solid var(--border-color);
    font-size: 0.9rem;
}

/* Notification Styles */
.notification {
    position: fixed;
    top: 25px; /* Slightly lower */
    left: 50%;
    transform: translateX(-50%) translateY(-60px); /* Initial off-screen */
    padding: 1rem 1.8rem;
    border-radius: var(--button-border-radius);
    color: white;
    font-size: 1rem;
    font-weight: 500;
    z-index: 3000;
    box-shadow: 0 8px 20px rgba(0, 0, 0, 0.35);
    opacity: 0;
    transition: opacity 0.4s ease-in-out, transform 0.4s ease-in-out;
    min-width: 300px;
    max-width: 90%;
    text-align: center;
}
.notification.success {
    background-color: #28a745;
    border-left: 5px solid #1e7e34;
}
.notification.error {
    background-color: var(--danger-color);
    border-left: 5px solid #b02a37;
}
.notification.info {
    background-color: #17a2b8;
    border-left: 5px solid #117a8b;
}

/* Provider Detail Modal Specific Styles */
.provider-detail-modal .modal-content {
    color: var(--primary-text-color);
}
.provider-detail-content {
    line-height: 1.75;
    font-size: 1rem;
}
.provider-detail-description {
    margin-bottom: 1.8rem;
    color: var(--secondary-text-color);
}
.provider-detail-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 1.5rem;
    margin-bottom: 1.8rem;
    background-color: #252525; 
    padding: 1.2rem;
    border-radius: var(--card-border-radius);
}
.provider-detail-grid strong {
    color: var(--accent-color);
    display: block;
    margin-bottom: 0.3rem;
}
.provider-detail-subtitle {
    color: var(--accent-color);
    margin-bottom: 1rem;
    font-size: 1.2rem;
    font-weight: 500;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 0.5rem;
}
.provider-detail-features {
    margin-bottom: 1.8rem;
    padding-left: 1.2rem;
    list-style-type: disc;
    color: var(--secondary-text-color);
}
.provider-detail-features li {
    margin-bottom: 0.5rem;
}
.provider-detail-info-box {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background: #252525;
    padding: 1.2rem;
    border-radius: var(--card-border-radius);
    margin-bottom: 1.8rem;
}
.provider-detail-info-box strong {
    color: var(--accent-color);
}
.provider-detail-doc-link {
    margin-bottom: 1.8rem;
}
.provider-detail-doc-link strong {
    color: var(--accent-color);
    display: block;
    margin-bottom: 0.3rem;
}
.provider-detail-doc-link a {
    color: var(--accent-color);
    text-decoration: none;
    word-break: break-all;
}
.provider-detail-doc-link a:hover {
    text-decoration: underline;
    color: var(--accent-color-hover);
}
.provider-detail-close-btn {
    width: 100%;
    margin-top: 1rem;
}


/* Responsive Design */
@media (max-width: 768px) {
    .hero-title {
        font-size: 2.2rem;
    }
    .section-title {
        font-size: 2rem;
    }
    .providers-grid, .secret-cards {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }
    .nav {
        gap: 0.5rem;
        flex-wrap: wrap; /* Allow nav items to wrap */
        justify-content: center;
    }
    .nav-link {
        padding: 0.5rem 0.8rem;
        font-size: 0.9rem;
    }
    .header .container {
        flex-direction: column;
        align-items: center;
        gap: 1rem;
        padding-bottom: 0.75rem; 
    }
    .main {
        margin-top: 140px; /* Adjust if header height changes significantly on wrap */
    }
    .secret-header {
        flex-direction: column;
        gap: 1.5rem;
        text-align: center;
    }
    .modal-content {
        margin: 5vh auto;
        padding: 1.8rem;
        max-width: 95%;
    }
    .notification {
        width: 90%;
        padding: 0.8rem 1.2rem;
        font-size: 0.9rem;
        top: 15px;
    }
    .provider-detail-grid {
        grid-template-columns: 1fr;
    }
}

/* Анимации */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(25px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}
.provider-card, .secret-card {
    animation: fadeInUp 0.6s ease-out forwards;
    opacity: 0; /* Start hidden */
}
.providers-grid .provider-card, .secret-cards .secret-card {
    animation-delay: calc(0.1s * var(--card-index, 0)); /* Slower stagger */
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    20%, 60% { transform: translateX(-10px); } /* More shake */
    40%, 80% { transform: translateX(10px); }
}
.shake-animation {
    animation: shake 0.4s cubic-bezier(.36,-0.07,.19,1.42); /* Custom cubic-bezier for bouncier shake */
}