:root {
    --primary: #2563eb;
    --primary-dark: #1d4ed8;
    --bg: #ffffff;
    --bg-secondary: #f8fafc;
    --text: #1e293b;
    --text-secondary: #64748b;
    --border: #e2e8f0;
    --shadow: rgba(0, 0, 0, 0.1);
    --success: #10b981;
    --error: #ef4444;
    --warning: #f59e0b;
}

.dark-theme {
    --primary: #3b82f6;
    --primary-dark: #2563eb;
    --bg: #0f172a;
    --bg-secondary: #1e293b;
    --text: #f1f5f9;
    --text-secondary: #94a3b8;
    --border: #334155;
    --shadow: rgba(0, 0, 0, 0.3);
}

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

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background: var(--bg);
    color: var(--text);
    line-height: 1.6;
    transition: all 0.3s ease;
}

.container {
    max-width: 800px;
    margin: 0 auto;
    padding: 20px;
}

header {
    text-align: center;
    margin-bottom: 20px;
    position: relative;
}

h1 {
    font-size: 2rem;
    font-weight: 700;
    margin-bottom: 5px;
    color: var(--text);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1rem;
}

.theme-toggle {
    position: absolute;
    top: 0;
    right: 0;
    background: var(--bg-secondary);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 12px;
    cursor: pointer;
    transition: all 0.3s ease;
}

.theme-toggle:hover {
    transform: scale(1.05);
}

.welcome-bar {
    margin-bottom: 20px;
    padding: 15px 20px;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border);
    text-align: center;
    opacity: 0;
    transform: translateY(-10px);
    animation: welcomeSlideIn 0.8s ease-out 0.3s forwards;
    position: relative;
}

@keyframes welcomeSlideIn {
    from {
        opacity: 0;
        transform: translateY(-10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.welcome-content {
    display: flex;
    justify-content: center;
    align-items: center;
}

.welcome-text {
    color: var(--text);
    font-weight: 600;
    font-size: 1.1rem;
    display: flex;
    align-items: center;
    gap: 8px;
}

.welcome-text #userIP {
    font-family: 'Consolas', 'Monaco', monospace;
    color: var(--primary);
    font-weight: 700;
}

.ip-container {
    display: inline-flex;
    align-items: center;
    gap: 8px;
    padding: 4px 8px;
    border-radius: 6px;
    transition: all 0.3s ease;
}

.ip-copy-icon {
    cursor: pointer;
    padding: 4px;
    border-radius: 4px;
    transition: all 0.3s ease;
    opacity: 0.6;
    font-size: 0.9em;
}

.ip-copy-icon:hover {
    opacity: 1;
    background: var(--primary);
    color: white;
    transform: scale(1.1);
}

.dark-theme .ip-copy-icon:hover {
    background: var(--primary);
    color: white;
}

.stats-bar {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
    gap: 12px;
    margin-bottom: 30px;
    padding: 20px;
    background: var(--bg-secondary);
    border-radius: 12px;
    border: 1px solid var(--border);
}

.stat-item {
    text-align: center;
}

.stat-value {
    display: block;
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--primary);
    white-space: nowrap;
}

.stat-label {
    display: block;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

.timezone-info {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin-top: 2px;
}

.stat-sublabel {
    font-size: 0.65rem;
    color: var(--text-secondary);
    opacity: 0.7;
    display: block;
    margin-top: 2px;
    font-weight: 400;
    line-height: 1.2;
}

.ai-metrics {
    font-size: 0.6rem;
    font-weight: 500;
    color: var(--text-secondary);
    line-height: 1.2;
    opacity: 0.8;
}

.ai-advisor-stat .stat-value {
    cursor: pointer;
    transition: transform 0.2s ease;
}

.ai-advisor-stat .stat-value:hover {
    transform: scale(1.1);
}

.card {
    background: var(--bg-secondary);
    border-radius: 12px;
    padding: 30px;
    box-shadow: 0 4px 6px var(--shadow);
    border: 1px solid var(--border);
}

.form-group {
    margin-bottom: 25px;
}

label {
    display: block;
    margin-bottom: 8px;
    font-weight: 500;
    color: var(--text);
    font-size: 0.95rem;
}

textarea {
    width: 100%;
    padding: 12px;
    border: 1px solid var(--border);
    border-radius: 8px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 14px;
    background: var(--bg);
    color: var(--text);
    resize: vertical;
    transition: border-color 0.3s ease;
}

textarea::placeholder {
    color: var(--text-secondary);
    opacity: 0.7;
}

.dark-theme textarea {
    background: rgba(255, 255, 255, 0.05);
    color: #f1f5f9;
}

textarea:focus {
    outline: none;
    border-color: var(--primary);
}

.presets-section {
    margin-bottom: 25px;
}

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

.presets-header h3 {
    font-size: 1rem;
    font-weight: 600;
    color: var(--text);
}

.toggle-presets {
    background: none;
    border: none;
    color: var(--primary);
    cursor: pointer;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 5px;
    transition: color 0.3s ease;
}

.toggle-presets:hover {
    color: var(--primary-dark);
}

#toggleIcon {
    transition: transform 0.3s ease;
}

.show-all #toggleIcon {
    transform: rotate(180deg);
}

.presets-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(100px, 1fr));
    gap: 8px;
    max-height: calc(2 * (44px + 8px) - 8px); /* Динамически: 2 строки по ~44px высота кнопки + gap */
    overflow: hidden;
    transition: max-height 0.3s ease;
}

.presets-grid.show-all {
    max-height: none; /* Убираем ограничение при показе всех */
}

.preset-btn {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 6px;
    padding: 8px 12px;
    cursor: pointer;
    transition: all 0.3s ease;
    font-size: 0.875rem;
    display: flex;
    align-items: center;
    gap: 6px;
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
    color: var(--text);
}

.dark-theme .preset-btn {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.1);
    color: #e2e8f0;
}

.preset-btn:hover {
    background: var(--primary);
    color: white;
    border-color: var(--primary);
    transform: translateY(-1px);
}

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

.format-section {
    margin-bottom: 25px;
}

.format-section label {
    font-weight: 500;
    color: var(--text);
    margin-bottom: 12px;
    display: block;
}

.radio-group {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 12px;
}

.radio-label {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: 16px 12px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    color: var(--text);
    text-align: center;
    min-height: 80px;
}

.dark-theme .radio-label {
    background: rgba(255, 255, 255, 0.05);
    border-color: rgba(255, 255, 255, 0.1);
    color: #e2e8f0;
}

.radio-label:hover {
    border-color: var(--primary);
}

.radio-label input[type="radio"] {
    position: absolute;
    opacity: 0;
}

.radio-label input[type="radio"]:checked + span {
    color: var(--primary);
    font-weight: 600;
}

.radio-label input[type="radio"]:checked ~ small {
    color: var(--primary);
}

.radio-label input[type="radio"]:checked + span::before {
    content: '✓ ';
    color: var(--primary);
}

.radio-label span {
    display: block;
    font-weight: 600;
    font-size: 1rem;
    margin-bottom: 4px;
}

.radio-label small {
    display: block;
    font-size: 0.8rem;
    color: var(--text-secondary);
    margin-top: 4px;
    margin-left: 0;
    line-height: 1.3;
}

.submit-btn {
    width: 100%;
    padding: 14px 24px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 8px;
    font-size: 1rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    position: relative;
    overflow: hidden;
}

.submit-btn:hover:not(:disabled) {
    background: var(--primary-dark);
    transform: translateY(-1px);
    box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
}

.submit-btn:disabled {
    opacity: 0.7;
    cursor: not-allowed;
}

.spinner {
    display: none;
    width: 16px;
    height: 16px;
    border: 2px solid rgba(255, 255, 255, 0.3);
    border-radius: 50%;
    border-top-color: white;
    animation: spin 0.8s linear infinite;
    position: absolute;
    right: 20px;
    top: 50%;
    transform: translateY(-50%);
}

.loading .spinner {
    display: block;
}

.loading .btn-text {
    margin-right: 30px;
}

@keyframes spin {
    to { transform: translateY(-50%) rotate(360deg); }
}

.result {
    margin-top: 30px;
}

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

.result h2 {
    font-size: 1.25rem;
    color: var(--text);
}

.result-stats {
    color: var(--text-secondary);
    font-size: 0.875rem;
}

.result-content {
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 20px;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 14px;
    line-height: 1.8;
    max-height: 400px;
    overflow-y: auto;
    position: relative;
    color: var(--text);
}

.dark-theme .result-content {
    background: rgba(0, 0, 0, 0.3);
    border-color: rgba(255, 255, 255, 0.1);
    color: #e2e8f0;
}

.result-content pre {
    margin: 0;
    color: inherit;
    white-space: pre-wrap;
    word-break: break-all;
}

.copy-btn, .download-btn {
    position: absolute;
    top: 10px;
    background: var(--primary);
    color: white;
    border: none;
    border-radius: 6px;
    padding: 8px 16px;
    cursor: pointer;
    font-size: 0.875rem;
    transition: all 0.3s ease;
}

.copy-btn {
    right: 10px;
}

.download-btn {
    right: 80px;
}

.copy-btn:hover, .download-btn:hover {
    background: var(--primary-dark);
}

.notification {
    position: fixed;
    bottom: 20px;
    right: 20px;
    padding: 16px 24px;
    border-radius: 8px;
    color: white;
    font-weight: 500;
    animation: slideIn 0.3s ease;
    z-index: 1000;
}

.notification.success {
    background: var(--success);
}

.notification.error {
    background: var(--error);
}

@keyframes slideIn {
    from {
        transform: translateX(100%);
        opacity: 0;
    }
    to {
        transform: translateX(0);
        opacity: 1;
    }
}

@media (max-width: 640px) {
    .container {
        padding: 15px;
    }

    .stats-bar {
        grid-template-columns: repeat(2, 1fr);
    }

    .card {
        padding: 20px;
    }

    .radio-group {
        grid-template-columns: repeat(2, 1fr);
        gap: 6px;
    }

    .radio-label {
        padding: 6px 4px;
        min-height: 50px;
    }

    .radio-label span {
        font-size: 0.75rem;
    }

    .radio-label small {
        font-size: 0.6rem;
        line-height: 1.1;
    }

    h1 {
        font-size: 1.5rem;
    }

    .welcome-bar {
        padding: 12px 15px;
    }

    .welcome-text {
        font-size: 1rem;
    }

    .ip-container {
        gap: 6px;
    }

    .ip-copy-icon {
        font-size: 0.8em;
        padding: 3px;
    }
}

/* Улучшаем видимость в Results секции */
.dark-theme .card {
    background: rgba(30, 41, 59, 0.8);
}

/* Делаем placeholder более видимым */
.dark-theme textarea::placeholder {
    color: #64748b;
}

/* Улучшаем контраст для статистики */
.dark-theme .stats-bar {
    background: rgba(30, 41, 59, 0.8);
    border-color: rgba(255, 255, 255, 0.1);
}

/* Начальное состояние результатов */
#results:not([style*="display: block"]) {
    display: none;
}

/* Улучшаем читаемость текста в тёмной теме */
.dark-theme {
    color-scheme: dark;
}

/* Фикс для лучшей видимости текста */
.dark-theme .stat-label {
    color: #cbd5e1;
}

.dark-theme .stat-sublabel {
    color: #94a3b8;
}

.dark-theme .toggle-presets {
    color: #60a5fa;
}

.dark-theme .toggle-presets:hover {
    color: #93bbfc;
}

/* Улучшаем видимость радио-кнопок */
.dark-theme .radio-label small {
    color: #94a3b8;
}

/* Стиль для пустого состояния */
.empty-state {
    text-align: center;
    padding: 40px;
    color: var(--text-secondary);
}

.empty-state-icon {
    font-size: 3rem;
    margin-bottom: 10px;
    opacity: 0.5;
}

@keyframes rotate {
    from { transform: rotate(0deg); }
    to { transform: rotate(360deg); }
}

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

.updating {
    animation: pulse 1s ease-in-out;
}

#lastUpdate {
    font-size: 1rem;
}

/* Footer styles */
.footer {
    margin-top: 40px;
    padding: 20px 0;
    border-top: 1px solid var(--border);
    background: var(--bg-secondary);
    border-radius: 12px;
}

.footer-content {
    text-align: center;
}

.copyright {
    color: var(--text-secondary);
    font-size: 0.875rem;
    line-height: 1.5;
}

.copyright a {
    color: var(--primary);
    text-decoration: none;
    transition: color 0.3s ease;
}

.copyright a:hover {
    color: var(--primary-dark);
    text-decoration: underline;
}

/* Responsive footer */
@media (max-width: 600px) {
    .footer {
        margin-top: 30px;
        padding: 15px 0;
    }
    
    .copyright {
        font-size: 0.8rem;
    }
}

/* Skeleton Loader Styles */
.skeleton-loader {
    padding: 20px;
    background: var(--bg);
    border: 1px solid var(--border);
    border-radius: 8px;
}
.skeleton-header {
    margin-bottom: 20px;
}
.skeleton-content {
    padding: 10px 0;
}
.skeleton-line {
    height: 1.2em;
    background-color: #e5e7eb;
    border-radius: 4px;
    margin-bottom: 12px;
    animation: skeleton-pulse 1.5s ease-in-out infinite;
}
.skeleton-line-h2 {
    height: 28px;
    width: 40%;
    margin-bottom: 10px;
    background-color: #e5e7eb;
    border-radius: 4px;
    animation: skeleton-pulse 1.5s ease-in-out infinite;
}
.skeleton-line-p {
    height: 20px;
    width: 60%;
    background-color: #e5e7eb;
    border-radius: 4px;
    animation: skeleton-pulse 1.5s ease-in-out infinite;
}
.dark-theme .skeleton-line,
.dark-theme .skeleton-line-h2,
.dark-theme .skeleton-line-p {
    background-color: rgba(255, 255, 255, 0.1);
}

@keyframes skeleton-pulse {
    0% {
        opacity: 0.6;
    }
    50% {
        opacity: 1;
    }
    100% {
        opacity: 0.6;
    }
}