/* Глобальные стили и сброс */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    --primary-color: #2563eb;
    --primary-hover: #1d4ed8;
    --secondary-color: #64748b;
    --secondary-hover: #475569;
    --background: #f8fafc;
    --surface: #ffffff;
    --text-primary: #0f172a;
    --text-secondary: #64748b;
    --border-color: #e2e8f0;
    --success: #10b981;
    --warning: #f59e0b;
    --error: #ef4444;
    --shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(0, 0, 0, 0.1);
    --shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, 0.1);
    --radius-sm: 0.375rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', 'Roboto', 'Oxygen',
        'Ubuntu', 'Cantarell', 'Fira Sans', 'Droid Sans', 'Helvetica Neue', sans-serif;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    background: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
}

/* Контейнер приложения */
.container {
    min-height: 100vh;
    display: flex;
    flex-direction: column;
    max-width: 1200px;
    margin: 0 auto;
    padding: 2rem;
}

/* Хедер */
.header {
    text-align: center;
    margin-bottom: 2rem;
}

.header h1 {
    font-size: 2rem;
    font-weight: 700;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

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

/* Основной контент */
.main {
    display: flex;
    flex-direction: column;
    gap: 2rem;
}

/* Секция управления */
.controls {
    background: var(--surface);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    gap: 1rem;
}

/* Кнопки */
.btn {
    padding: 0.625rem 1.25rem;
    border: none;
    border-radius: var(--radius-md);
    font-size: 0.9rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    outline: none;
}

.btn:hover:not(:disabled) {
    transform: translateY(-2px);
    box-shadow: var(--shadow-lg);
}

.btn:active:not(:disabled) {
    transform: translateY(0);
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

.btn-primary:hover:not(:disabled) {
    background: var(--primary-hover);
}

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

.btn-secondary:hover:not(:disabled) {
    background: var(--secondary-hover);
}

.btn-large {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}

/* Индивидуальные тесты */
.individual-tests {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
    gap: 1rem;
}

/* Прогресс-бар */
.progress-container {
    background: var(--surface);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
    margin-bottom: 1.5rem;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 0.75rem;
}

.progress-text {
    font-size: 0.9rem;
    font-weight: 600;
    color: var(--text-primary);
}

.progress-percentage {
    font-size: 0.875rem;
    font-weight: 600;
    color: var(--primary-color);
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--background);
    border-radius: 10px;
    overflow: hidden;
    position: relative;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--primary-color), var(--success));
    border-radius: 10px;
    transition: width 0.3s ease;
    position: relative;
    overflow: hidden;
}

.progress-bar-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(
        90deg,
        transparent,
        rgba(255, 255, 255, 0.3),
        transparent
    );
    animation: shimmer 1.5s infinite;
}

@keyframes shimmer {
    0% {
        transform: translateX(-100%);
    }
    100% {
        transform: translateX(100%);
    }
}

/* Секция результатов */
.results {
    background: var(--surface);
    padding: 1.5rem;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-md);
}

.results h2 {
    font-size: 1.25rem;
    margin-bottom: 1rem;
    color: var(--text-primary);
}

.no-results {
    text-align: center;
    color: var(--text-secondary);
    padding: 2rem 1rem;
    font-size: 0.95rem;
}

/* Сетка результатов */
.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 1rem;
}

/* Карточка результата */
.result-card {
    background: var(--background);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    padding: 1rem;
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.5rem;
    transition: all 0.2s ease;
}

.result-card:hover {
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
    transform: translateY(-2px);
}

.result-icon {
    font-size: 1.75rem;
}

.result-label {
    font-size: 0.75rem;
    color: var(--text-secondary);
    text-transform: uppercase;
    letter-spacing: 0.05em;
    font-weight: 600;
    text-align: center;
}

.result-value {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--text-primary);
    display: flex;
    align-items: baseline;
    gap: 0.375rem;
}

.result-unit {
    font-size: 0.75rem;
    font-weight: 500;
    color: var(--text-secondary);
}

.result-quality {
    display: flex;
    align-items: center;
    gap: 0.375rem;
    margin-top: 0.5rem;
    padding-top: 0.5rem;
    border-top: 1px solid var(--border-color);
}

.quality-icon {
    font-size: 1rem;
}

.quality-text {
    font-size: 0.75rem;
    font-weight: 600;
}

/* Цвета для качества соединения */
.quality-excellent {
    border-color: var(--success);
}

.quality-excellent .result-value {
    color: var(--success);
}

.quality-excellent .quality-text {
    color: var(--success);
}

.quality-good {
    border-color: var(--warning);
}

.quality-good .result-value {
    color: var(--warning);
}

.quality-good .quality-text {
    color: var(--warning);
}

.quality-poor {
    border-color: var(--error);
}

.quality-poor .result-value {
    color: var(--error);
}

.quality-poor .quality-text {
    color: var(--error);
}

/* Футер */
.footer {
    margin-top: 2rem;
    padding-top: 1.5rem;
    border-top: 1px solid var(--border-color);
    text-align: center;
}

.footer-content {
    display: flex;
    flex-direction: column;
    align-items: center;
    gap: 0.75rem;
}

.footer-title {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--text-primary);
    margin: 0;
}

.footer-subtitle {
    font-size: 0.75rem;
    color: var(--text-secondary);
    margin: 0;
}

.app-links {
    display: flex;
    gap: 1rem;
    flex-wrap: wrap;
    justify-content: center;
    margin-top: 0.5rem;
}

.app-link {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.375rem;
    padding: 0.75rem;
    background: var(--background);
    border: 2px solid var(--border-color);
    border-radius: var(--radius-md);
    text-decoration: none;
    color: var(--text-primary);
    transition: all 0.2s ease;
    width: 100px;
    min-height: 90px;
}

.app-link:hover {
    transform: translateY(-2px);
    border-color: var(--primary-color);
    box-shadow: var(--shadow-md);
}

.app-icon {
    font-size: 2rem;
}

.app-icon-img {
    width: 40px;
    height: 40px;
    object-fit: contain;
    transition: transform 0.2s ease;
}

.app-link:hover .app-icon-img {
    transform: scale(1.1);
}

.app-name {
    font-size: 0.75rem;
    font-weight: 600;
    color: var(--text-secondary);
    text-align: center;
    white-space: nowrap;
}

/* Адаптивность */
@media (max-width: 768px) {
    .container {
        padding: 0.75rem;
    }

    .header {
        margin-bottom: 1.25rem;
    }

    .header h1 {
        font-size: 1.5rem;
    }

    .subtitle {
        font-size: 0.85rem;
    }

    .main {
        gap: 1.25rem;
    }

    .controls,
    .results {
        padding: 1rem;
    }

    .progress-container {
        padding: 1rem;
        margin-bottom: 1rem;
    }

    .progress-info {
        margin-bottom: 0.5rem;
    }

    .progress-text {
        font-size: 0.8rem;
    }

    .progress-percentage {
        font-size: 0.75rem;
    }

    .progress-bar {
        height: 6px;
    }

    .results h2 {
        font-size: 1.1rem;
        margin-bottom: 0.75rem;
    }

    .results-grid {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .result-card {
        padding: 0.875rem;
    }

    .result-icon {
        font-size: 1.5rem;
    }

    .result-value {
        font-size: 1.35rem;
    }

    .result-label {
        font-size: 0.7rem;
    }

    .individual-tests {
        grid-template-columns: 1fr;
        gap: 0.75rem;
    }

    .btn {
        padding: 0.5rem 1rem;
        font-size: 0.85rem;
    }

    .btn-large {
        padding: 0.625rem 1.25rem;
        font-size: 0.9rem;
    }

    .app-links {
        gap: 0.75rem;
        width: 100%;
        max-width: 350px;
    }

    .app-link {
        width: 85px;
        min-height: 80px;
        padding: 0.625rem;
    }

    .app-icon-img {
        width: 32px;
        height: 32px;
    }

    .app-name {
        font-size: 0.7rem;
    }

    .footer {
        margin-top: 1.5rem;
        padding-top: 1rem;
    }

    .footer-title {
        font-size: 1.1rem;
    }

    .footer-subtitle {
        font-size: 0.7rem;
    }
}

/* Анимация загрузки */
@keyframes pulse {
    0%, 100% {
        opacity: 1;
    }
    50% {
        opacity: 0.5;
    }
}

.btn:disabled {
    animation: pulse 2s cubic-bezier(0.4, 0, 0.6, 1) infinite;
}