:root {
    --bg-primary: #0d1117;
    --bg-secondary: #161b22;
    --bg-tertiary: #21262d;
    --text-primary: #f0f6fc;
    --text-secondary: #c9d1d9;
    --text-tertiary: #8b949e;
    --accent-primary: #58a6ff;
    --accent-secondary: #79c0ff;
    --danger: #f85149;
    --success: #3fb950;
    --warning: #d29922;
    --border-radius: 12px;
    --border-radius-sm: 8px;
    --border-radius-lg: 16px;

    --glass-effect: rgba(22, 27, 34, 0.85);
    --border-glow: 0 0 0 2px rgba(88, 166, 255, 0.4);
    --text-glow: 0 0 8px rgba(88, 166, 255, 0.6);

    --shadow-sm: 0 1px 3px rgba(1, 4, 9, 0.5),
    0 1px 2px rgba(1, 4, 9, 0.25);
    --shadow-md: 0 4px 6px rgba(1, 4, 9, 0.3),
    0 1px 3px rgba(1, 4, 9, 0.15);
    --shadow-lg: 0 10px 25px rgba(1, 4, 9, 0.2),
    0 5px 10px rgba(1, 4, 9, 0.1);
    --shadow-inset: inset 0 1px 3px rgba(1, 4, 9, 0.5),
    inset 0 1px 2px rgba(1, 4, 9, 0.25);

    --gradient-primary: linear-gradient(135deg, var(--accent-primary) 0%, var(--accent-secondary) 100%);
    --gradient-danger: linear-gradient(135deg, var(--danger) 0%, #ff7b72 100%);

    --transition: all 0.25s cubic-bezier(0.4, 0, 0.2, 1);
    --transition-slow: all 0.4s cubic-bezier(0.4, 0, 0.2, 1);

    --spacing-xs: 4px;
    --spacing-sm: 8px;
    --spacing-md: 16px;
    --spacing-lg: 24px;
    --spacing-xl: 32px;
}

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

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Helvetica, Arial, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
    background-image:
            radial-gradient(at 20% 30%, rgba(88, 166, 255, 0.1) 0, transparent 40%),
            radial-gradient(at 80% 80%, rgba(248, 81, 73, 0.1) 0, transparent 40%);
}

.app-container {
    display: grid;
    grid-template-columns: 300px 1fr;
    min-height: 100vh;
    background: var(--bg-primary);
}

.content-area {
    flex: 1;
    padding: var(--spacing-xl);
    background-color: var(--bg-primary);
}

.card {
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: var(--transition-slow);
    border: 1px solid rgba(240, 246, 252, 0.1);
    position: relative;
    overflow: hidden;
}

.card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(88, 166, 255, 0.05) 0%, transparent 100%);
    opacity: 0;
    transition: var(--transition-slow);
}

.card:hover {
    box-shadow: var(--shadow-lg);
    border-color: rgba(88, 166, 255, 0.3);
}

.card:hover::before {
    opacity: 1;
}

.search-container {
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius);
    padding: var(--spacing-xl);
    box-shadow: var(--shadow-md);
    transition: var(--transition);
    border: 1px solid rgba(240, 246, 252, 0.1);
}

.search-container:hover {
    border-color: rgba(88, 166, 255, 0.3);
    box-shadow: var(--shadow-lg);
}

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    border-radius: var(--border-radius-sm);
    font-weight: 500;
    font-size: 14px;
    line-height: 20px;
    cursor: pointer;
    transition: var(--transition);
    border: none;
    position: relative;
    overflow: hidden;
    z-index: 1;
}

.btn::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: linear-gradient(135deg, rgba(255, 255, 255, 0.1) 0%, transparent 100%);
    opacity: 0;
    transition: var(--transition);
    z-index: -1;
}

.btn:hover::after {
    opacity: 1;
}

.btn-primary {
    background-color: var(--accent-primary);
    color: #ffffff;
}

.btn-primary:hover {
    background-color: var(--accent-secondary);
    box-shadow: 0 4px 15px rgba(88, 166, 255, 0.3);
}

.btn-danger {
    background-color: var(--danger);
    color: #ffffff;
}

.btn-danger:hover {
    background-color: #ff7b72;
    box-shadow: 0 4px 15px rgba(248, 81, 73, 0.3);
}

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid rgba(240, 246, 252, 0.1);
}

.btn-secondary:hover {
    background-color: #30363d;
    border-color: rgba(88, 166, 255, 0.4);
}

.add-category-block {
    margin-top: 15px;
}

.add-category-container {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 10px;
}

.add-category-container input {
    flex: 1;
}

#add-category-icon {
    margin-top: 2px;
    white-space: nowrap;
}

.form-group {
    margin-bottom: var(--spacing-lg);
    position: relative;
}

.form-label {
    display: block;
    font-size: 14px;
    font-weight: 500;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    transition: var(--transition);
}

.form-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(300px, 1fr));
    gap: var(--spacing-lg);
}

.form-section {
    background: var(--bg-secondary);
    padding: var(--spacing-lg);
    border-radius: var(--border-radius);
}

.form-control {
    width: 100%;
    padding: 10px 12px;
    background-color: var(--bg-tertiary);
    border: 1px solid rgba(240, 246, 252, 0.1);
    border-radius: var(--border-radius-sm);
    color: var(--text-primary);
    font-family: inherit;
    font-size: 14px;
    line-height: 20px;
    transition: var(--transition);
    box-shadow: var(--shadow-inset);
}

.form-control:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: var(--border-glow), var(--shadow-inset);
}

textarea.form-control {
    min-height: 120px;
    resize: vertical;
    line-height: 1.5;
}


.sidebar {
    background: linear-gradient(135deg, var(--bg-secondary) 0%, var(--bg-tertiary) 100%);
    border-right: 1px solid rgba(88, 166, 255, 0.1);
    padding: var(--spacing-xl);
    position: relative;
    overflow: hidden;
    width: 300px;
    flex-shrink: 0;

    display: flex;
    flex-direction: column;
    justify-content: space-between;
    height: 100%;
}

.sidebar::before {
    content: '';
    position: absolute;
    top: -50%;
    left: -50%;
    width: 200%;
    height: 200%;
    background: radial-gradient(circle, rgba(88, 166, 255, 0.05) 0%, transparent 70%);
    animation: rotate 20s linear infinite;
    z-index: 0;
}

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

.sidebar-top {
    flex-grow: 1;
    display: flex;
    flex-direction: column;
}

.menu-header {
    position: relative;
    z-index: 1;
    margin-bottom: var(--spacing-xl);
    padding-bottom: var(--spacing-md);
    border-bottom: 1px solid rgba(88, 166, 255, 0.2);
}

.menu-title {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--accent-primary);
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
}

.menu-subtitle {
    color: var(--text-secondary);
    font-size: 0.9rem;
    opacity: 0.8;
}

.nav-menu {
    position: relative;
    z-index: 1;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);

    flex-grow: 1;
}

.nav-menu-bottom {
    display: flex;
    flex-direction: column;
    gap: 10px;
    position: relative;
    z-index: 1;
    padding-top: var(--spacing-md);
    border-top: 1px solid rgba(88, 166, 255, 0.2);
}

.nav-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    border-radius: var(--border-radius-sm);
    color: var(--text-secondary);
    text-decoration: none;
    transition: var(--transition);
    position: relative;
    overflow: hidden;
}

.nav-item::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(88, 166, 255, 0.1), transparent);
    transition: var(--transition-slow);
}

.nav-item:hover {
    background: rgba(88, 166, 255, 0.1);
    color: var(--text-primary);
    transform: translateX(5px);
}

.nav-item:hover::before {
    left: 100%;
}

.nav-item i {
    width: 24px;
    font-size: 1.1rem;
    color: var(--accent-primary);
    transition: var(--transition);
}

.nav-item.active {
    background: rgba(88, 166, 255, 0.2);
    color: var(--accent-primary);
    font-weight: 600;
}

.nav-item.active i {
    color: var(--accent-secondary);
}

.content-area {
    padding: var(--spacing-xl);
    background: var(--bg-primary);
    position: relative;
    overflow-y: auto;
    max-height: 100vh;
}

.table {
    width: 100%;
    border-collapse: collapse;
    background-color: var(--bg-secondary);
    border-radius: var(--border-radius);
    overflow: hidden;
    box-shadow: var(--shadow-sm);
}

.table th, .table td {
    padding: var(--spacing-md) var(--spacing-lg);
    text-align: left;
    border-bottom: 1px solid rgba(240, 246, 252, 0.1);
}

.table th {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    font-weight: 600;
    font-size: 13px;
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.table tr:last-child td {
    border-bottom: none;
}

.table tr:hover td {
    background-color: rgba(88, 166, 255, 0.03);
}

.table-container {
    overflow-x: auto;
    margin-bottom: var(--spacing-xl);
}

.table {
    min-width: 600px;
}

.goal-chips, .level-tags {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-xs);
}

.goal-chip, .level-tag {
    display: inline-flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-md);
    border-radius: 20px;
    font-size: 13px;
    font-weight: 500;
    cursor: pointer;
    transition: var(--transition);
    user-select: none;
}

.goal-chip {
    background-color: var(--bg-tertiary);
    color: var(--text-secondary);
    border: 1px solid rgba(240, 246, 252, 0.1);
}

.goal-chip.selected {
    background-color: rgba(88, 166, 255, 0.2);
    color: var(--accent-primary);
    border-color: var(--accent-primary);
}

.level-tag {
    background-color: transparent;
    color: var(--text-secondary);
    border: 1px solid rgba(240, 246, 252, 0.1);
}

.level-tag.active {
    background-color: rgba(88, 166, 255, 0.2);
    color: var(--accent-primary);
    border-color: var(--accent-primary);
}

.file-upload {
    position: relative;
}

.file-upload input[type="file"] {
    width: 100%;
    padding: var(--spacing-sm);
    background-color: var(--bg-tertiary);
    border-radius: var(--border-radius-sm);
    border: 1px dashed rgba(240, 246, 252, 0.2);
    color: var(--text-primary);
    transition: var(--transition);
}

.file-upload input[type="file"]:hover {
    border-color: var(--accent-primary);
    background-color: rgba(88, 166, 255, 0.05);
}

.error-message {
    color: var(--danger);
    font-size: 13px;
    margin-top: var(--spacing-xs);
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-5px); }
    to { opacity: 1; transform: translateY(0); }
}

.floating-shapes {
    position: absolute;
    width: 100%;
    height: 100%;
    top: 0;
    left: 0;
    pointer-events: none;
    overflow: hidden;
    z-index: 0;
}

.shape {
    position: absolute;
    border-radius: 50%;
    opacity: 0.1;
    filter: blur(40px);
}

.sidebar .shape-1 {
    width: 300px;
    height: 300px;
    background: var(--accent-primary);
    top: -100px;
    right: -100px;
}

.sidebar .shape-2 {
    width: 200px;
    height: 200px;
    background: var(--danger);
    bottom: -50px;
    left: -50px;
}

.content-area .shape-1 {
    width: 400px;
    height: 400px;
    background: var(--accent-primary);
    top: 20%;
    left: 20%;
    animation: float 12s ease-in-out infinite;
}

.content-area .shape-2 {
    width: 300px;
    height: 300px;
    background: var(--danger);
    bottom: 10%;
    right: 20%;
    animation: float 10s ease-in-out infinite reverse;
}

@keyframes float {
    0%, 100% { transform: translate(0, 0); }
    25% { transform: translate(-20px, -20px); }
    50% { transform: translate(10px, 20px); }
    75% { transform: translate(20px, -10px); }
}

@media (max-width: 1024px) {
    .app-container {
        grid-template-columns: 250px 1fr;
    }
    .sidebar {
        width: 250px;
    }
}

@media (max-width: 768px) {
    .app-container {
        grid-template-columns: 1fr;
        grid-template-rows: auto 1fr;
    }

    .sidebar {
        width: 100%;
        height: auto;
        padding: var(--spacing-md);
        border-right: none;
        border-bottom: 1px solid rgba(88, 166, 255, 0.1);
    }

    .menu-header {
        display: flex;
        align-items: center;
        justify-content: space-between;
        margin-bottom: var(--spacing-md);
    }

    .menu-title {
        font-size: 1.2rem;
        margin-bottom: 0;
    }

    .menu-subtitle {
        display: none;
    }

    .nav-menu {
        flex-direction: row;
        flex-wrap: wrap;
    }

    .nav-item {
        padding: var(--spacing-sm) var(--spacing-md);
        font-size: 0.9rem;
    }

    .nav-item span {
        display: none;
    }

    .nav-item i {
        font-size: 1rem;
    }
}


.exercise-detail-page .content-area,
.exercise-search-page .content-area {
    display: block;
    min-height: auto;
}

.search-container {
    margin-bottom: var(--spacing-xl);
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    margin-top: var(--spacing-xl);
    gap: var(--spacing-sm);
    flex-wrap: wrap;
}

.form-actions .btn {
    flex: 1;
    min-width: 120px;
}

.options {
    display: flex;
    flex-wrap: wrap;
    gap: var(--spacing-sm);
}

.options label {
    display: flex;
    align-items: center;
    padding: var(--spacing-xs) var(--spacing-sm);
    border-radius: var(--border-radius-sm);
    background-color: var(--bg-tertiary);
    border: 1px solid rgba(240, 246, 252, 0.1);
    transition: var(--transition);
    cursor: pointer;
}

.options label:hover {
    background-color: rgba(88, 166, 255, 0.1);
    border-color: var(--accent-primary);
}

.options input[type="checkbox"],
.options input[type="radio"] {
    margin-right: var(--spacing-xs);
}

::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

::-webkit-scrollbar-track {
    background: var(--bg-tertiary);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb {
    background: var(--accent-primary);
    border-radius: 10px;
}

::-webkit-scrollbar-thumb:hover {
    background: var(--accent-secondary);
}

:focus-visible {
    outline: 2px solid var(--accent-primary);
    outline-offset: 2px;
}

.search-container.card,
.search-container.card:hover {
    background: var(--bg-secondary) !important;
    box-shadow: var(--shadow-md) !important;
    border: 1px solid rgba(240, 246, 252, 0.1) !important;
    transform: none !important;
    transition: none !important;
    pointer-events: none !important;
}

.search-container.card * {
    pointer-events: auto !important;
}

.search-container.card input:hover,
.search-container.card button:hover,
.search-container.card select:hover {
    background: transparent !important;
    border-color: inherit !important;
}

.search-container.card select,
.search-container.card select option {
    color: var(--text-primary) !important;
    background-color: var(--bg-secondary) !important;
}

.search-container.card select:focus {
    border-color: var(--accent-primary) !important;
}

.search-container.card option {
    padding: 8px !important;
}

.search-container.card option:hover {
    background-color: var(--accent-primary) !important;
    color: white !important;
}

.top-alert {
    position: fixed;
    top: 20px;
    left: 50%;
    transform: translateX(-50%);
    background-color: #ff4d4f;
    color: #fff;
    padding: 15px 20px;
    border-radius: 8px;
    box-shadow: 0 0 15px rgba(255, 77, 79, 0.4);
    z-index: 9999;
    display: flex;
    align-items: center;
    gap: 10px;
    font-weight: 600;
    animation: fadeIn 0.4s ease-out;
}

.top-alert i {
    font-size: 1.2rem;
}

.close-alert {
    background: rgba(255, 255, 255, 0.2);
    color: #fff;
    border: none;
    padding: 6px 12px;
    margin-left: auto;
    border-radius: 4px;
    cursor: pointer;
    font-weight: bold;
    transition: background 0.2s;
}

.close-alert:hover {
    background: rgba(255, 255, 255, 0.4);
}

@keyframes fadeIn {
    from { opacity: 0; transform: translate(-50%, -20px); }
    to { opacity: 1; transform: translate(-50%, 0); }
}

.profile-page .content-area {
    padding: var(--spacing-xl);
}

.info-row {
    display: flex;
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid rgba(240, 246, 252, 0.1);
}

.info-row:last-child {
    border-bottom: none;
}

.info-label {
    width: 150px;
    color: var(--text-secondary);
    font-weight: 500;
}

.info-value {
    color: var(--text-primary);
    flex: 1;
}

.activity-item {
    display: flex;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
    border-bottom: 1px solid rgba(240, 246, 252, 0.1);
}

.activity-item:last-child {
    border-bottom: none;
}

.activity-icon {
    color: var(--accent-primary);
    font-size: 1.2rem;
    margin-top: 2px;
}

.activity-content {
    flex: 1;
}

.activity-text {
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.activity-time {
    color: var(--text-secondary);
    font-size: 0.8rem;
}

@media (max-width: 768px) {
    .profile-header {
        flex-direction: column;
        text-align: center;
    }

    .profile-info {
        text-align: center;
    }

    .info-row {
        flex-direction: column;
        gap: var(--spacing-xs);
    }

    .info-label {
        width: 100%;
    }
}

.btn-danger {
    background-color: #e55353;
    color: white;
    border: none;
    padding: 8px 16px;
    font-weight: 600;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: background-color 0.3s;
}

.btn-danger:hover {
    background-color: #cc4444;
}

input:-webkit-autofill {
    -webkit-box-shadow: 0 0 0px 1000px var(--bg-tertiary) inset !important;
    -webkit-text-fill-color: var(--text-primary) !important;
    transition: background-color 5000s ease-in-out 0s;
}

.invalid-field {
    border: 1px solid var(--danger);
    background-color: var(--bg-secondary); /* сохраняет тёмную тему */
    color: var(--text-primary);
}

.invalid-field select {
    background-color: var(--bg-secondary);
    color: var(--text-primary);
}

.invalid-message {
    color: #e74c3c;
    font-size: 0.85rem;
    margin-top: 5px;
}

.file-size-bar-container {
    position: relative;
    width: 100%;
    height: 12px;
    border-radius: 8px;
    background: #2a2a2a; /* тёмный фон под полосу */
    margin-top: 10px;
    margin-bottom: 15px;
    box-shadow: inset 0 2px 5px rgba(0,0,0,0.5);
}

.file-size-bar {
    height: 100%;
    width: 0;
    border-radius: 8px;
    background: linear-gradient(90deg, #a0d8ff, #7fcfff, #4a90e2, #001f5b);
    transition: width 0.3s ease, background 0.3s ease;
}

.file-size-text {
    position: absolute;
    top: 16px;
    right: 0;
    font-size: 0.85rem;
    color: #fff;
    font-weight: 500;
}