/* ============================================
   APP CONTAINER
   ============================================ */
.app-container {
    width: var(--container-width);
    min-height: 100vh;
    min-height: 100dvh;
    margin: 0 auto;
    background: var(--color-bg-primary);
/*     border: 1px solid var(--color-border);
    border-radius: var(--radius-md); */
    display: flex;
    flex-direction: column;
    padding: var(--spacing-md) var(--spacing-sm);
    gap: 13px;
}

body {
    background: linear-gradient(270deg, #560000 0%, #1E1E1E 10%, #1E1E1E 90%, #560000 100%);
    margin: 0;
    padding: 0;
}
/* ============================================
   HEADER (общий)
   ============================================ */
.header {
    display: flex;
    align-items: center;
    flex-shrink: 0;
    height: 60px;
    width: 100%;
}

/* Только для страниц с кнопкой "назад" */
.header.has-back {
    position: relative;
}

.header.has-back .logo {
    position: absolute;
    left: 50%;
    top: 50%;
    transform: translate(-50%, -50%);
}

/* На главной (без back-btn) */
.header:not(.has-back) {
    justify-content: space-between;
    gap: 15px;
}

.header:not(.has-back) .logo {
    flex-shrink: 0;
}

.header:not(.has-back) .logo img {
    height: 60px;
    width: auto;
    max-width: 150px;
    object-fit: contain;
}

.back-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 44px;
    height: 44px;
    border-radius: var(--radius-md);
    background: transparent;
    border: 1px solid var(--color-border);
    cursor: pointer;
    transition: all var(--transition-fast);
    flex-shrink: 0;
    position: relative;
    z-index: 1;
}

.back-btn:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--color-text-secondary);
}

.logo img {
    height: 60px;
    width: auto;
    object-fit: contain;
}

/* ============================================
   SECTION TITLE
   ============================================ */
.section-title {
    text-align: center;
    width: 100%;
    flex-shrink: 0;
}

.section-title h1 {
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: #9E0000;
    margin-bottom: 4px;
}

.section-title p {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    background: linear-gradient(90deg, #9E0000 0%, #560000 100%);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.section-title .subtitle-white {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    -webkit-text-fill-color: var(--color-text-primary);
}

.section-title .exercise-name {
    font-size: var(--font-size-lg);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    -webkit-text-fill-color: var(--color-text-primary);
    margin-bottom: 8px;
    line-height: var(--line-height-relaxed);
}

.divider {
    width: 100%;
    height: 1px;
    background: linear-gradient(90deg, transparent 0%, rgba(255,255,255,0.2) 20%, rgba(255,255,255,0.2) 80%, transparent 100%);
    margin: 8px 0;
}

/* ============================================
   BUTTONS
   ============================================ */
.btn-confirm {
    display: flex;
    align-items: center;
    justify-content: center;
    width: 100%;
    min-height: 80px;
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    background: radial-gradient(50% 50% at 50% 50%, #990000 0.48%, #550000 100%);
    border: none;
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-normal);
    flex-shrink: 0;
    margin-top: auto;
}

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

.btn-confirm:active:not(:disabled) { transform: scale(0.98); }

.btn-confirm:disabled {
    opacity: 0.4;
    cursor: not-allowed;
    background: #333;
}

.btn-outline {
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-xs);
    width: 100%;
    min-height: 80px;
    padding: var(--spacing-xs) var(--spacing-md);
    font-size: var(--font-size-2xl);
    font-weight: var(--font-weight-bold);
    color: var(--color-text-primary);
    background: transparent;
    border: 1px solid var(--color-border);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-normal);
}

.btn-outline:hover {
    background: rgba(255, 255, 255, 0.05);
    border-color: var(--color-text-secondary);
}

/* ============================================
   SELECTION ANIMATION
   ============================================ */
@keyframes selectPop {
    0% { transform: scale(1); }
    50% { transform: scale(1.03); }
    100% { transform: scale(1); }
}

.selectable {
    cursor: pointer;
    transition: all var(--transition-normal);
    -webkit-tap-highlight-color: transparent;
    user-select: none;
}

.selectable:hover {
    border-color: var(--color-text-secondary);
    background: rgba(255, 255, 255, 0.03);
}

.selectable:active { transform: scale(0.97); }

.selectable.selected {
    background: var(--color-accent-light) !important;
    border-color: white !important;
    box-shadow: inset 0 0 20px rgba(253, 43, 43, 0.15);
}

.selectable.selected-animate { animation: selectPop 0.3s ease; }

/* ============================================
   TOAST
   ============================================ */
.toast {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%);
    padding: 12px 24px;
    background: #2A2A2A;
    border: 1px solid rgba(255, 255, 255, 0.2);
    border-radius: 8px;
    color: white;
    font-family: var(--font-family);
    font-size: 14px;
    z-index: 1000;
    animation: slideUp 0.3s ease;
}

@keyframes slideUp {
    from { transform: translateX(-50%) translateY(100%); opacity: 0; }
    to { transform: translateX(-50%) translateY(0); opacity: 1; }
}

/* ============================================
   SCROLLBAR
   ============================================ */
.custom-scroll {
    scrollbar-width: thin;
    scrollbar-color: #636262 transparent;
}

.custom-scroll::-webkit-scrollbar { width: 6px; }
.custom-scroll::-webkit-scrollbar-track { background: transparent; }
.custom-scroll::-webkit-scrollbar-thumb { background: #636262; border-radius: 3px; }
.custom-scroll::-webkit-scrollbar-thumb:hover { background: #888; }

/* ============================================
   LOADING / EMPTY
   ============================================ */
.loading-state {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 60px;
    color: var(--color-text-secondary);
    font-size: var(--font-size-lg);
    gap: 10px;
}

.loading-state::after {
    content: '';
    width: 20px;
    height: 20px;
    border: 2px solid var(--color-border);
    border-top-color: var(--color-accent);
    border-radius: 50%;
    animation: spin 0.8s linear infinite;
}

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

.empty-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 200px;
    gap: var(--spacing-xs);
    color: var(--color-text-secondary);
    font-size: var(--font-size-lg);
    text-align: center;
}