/* ==========================================
   1. CSS CUSTOM PROPERTIES (ПЕРЕМЕННЫЕ)
   ========================================== */
:root {
    --app-content-max-width: 1180px;
    --transition-speed: 0.3s;
    --border-radius-sm: 8px;
    --border-radius-md: 12px;
    --border-radius-lg: 16px;
    --border-radius-xl: 20px;
    --border-radius-full: 50%;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --font-size-xs: 0.6875rem;
    --font-size-sm: 0.75rem;
    --font-size-base: 0.875rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.125rem;
    --font-size-xl: 1.25rem;
    --font-size-2xl: 1.5rem;
    --font-size-3xl: 1.75rem;
}

/* ==========================================
   2. ТЕМЫ (DARK / LIGHT)
   ========================================== */
[data-theme="dark"] {
    /* Фоны */
    --bg-primary: #000000;
    --bg-secondary: #0a0a0a;
    --bg-card: #121212;
    --bg-input: #191919;
    --bg-row-odd: #0d0d0d;
    --bg-row-even: #141414;
    --bg-highlight: color-mix(in srgb, var(--ui-accent, #1ec8a2) 16%, transparent);

    /* Текст */
    --text-primary: #ffffff;
    --text-secondary: #a0aec0;
    --text-muted: #718096;

    /* Акценты */
    --accent-primary: #1ec8a2;
    --accent-secondary: #0f9f87;
    --accent-gradient: linear-gradient(135deg, #0f9f87 0%, #1ec8a2 58%, #ff9f43 100%);
    --action-edit-primary: #f59e0b;
    --action-edit-secondary: #f97316;
    --action-edit-tertiary: #fbbf24;
    --action-edit-gradient: linear-gradient(135deg, #f59e0b 0%, #f97316 58%, #fbbf24 100%);

    /* Границы и тени */
    --border-color: rgba(148, 163, 184, 0.24);
    --shadow-color: rgba(0, 0, 0, 0.3);

    /* Семантические цвета */
    --success-color: #48bb78;
    --success-bg: rgba(72, 187, 120, 0.15);
    --error-color: #fc8181;
    --error-bg: rgba(252, 129, 129, 0.15);
    --warning-color: #f6ad55;
    --warning-bg: rgba(246, 173, 85, 0.15);
}

[data-theme="light"] {
    --bg-primary: #f7fafc;
    --bg-secondary: #ffffff;
    --bg-card: #ffffff;
    --bg-input: #edf2f7;
    --bg-row-odd: #f7fafc;
    --bg-row-even: #ffffff;
    --bg-highlight: color-mix(in srgb, var(--ui-accent, #1ec8a2) 12%, transparent);
    --text-primary: #1a202c;
    --text-secondary: #4a5568;
    --text-muted: #718096;
    --accent-primary: #1ec8a2;
    --accent-secondary: #0f9f87;
    --accent-gradient: linear-gradient(135deg, #0f9f87 0%, #1ec8a2 58%, #ff9f43 100%);
    --action-edit-primary: #d97706;
    --action-edit-secondary: #ea580c;
    --action-edit-tertiary: #f59e0b;
    --action-edit-gradient: linear-gradient(135deg, #d97706 0%, #ea580c 58%, #f59e0b 100%);
    --border-color: #e2e8f0;
    --shadow-color: rgba(0, 0, 0, 0.1);
    --success-color: #38a169;
    --success-bg: rgba(56, 161, 105, 0.1);
    --error-color: #e53e3e;
    --error-bg: rgba(229, 62, 62, 0.1);
    --warning-color: #dd6b20;
    --warning-bg: rgba(221, 107, 32, 0.1);
}

/* ==========================================
   3. СБРОС И БАЗОВЫЕ СТИЛИ
   ========================================== */
*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-tap-highlight-color: transparent;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, 'Helvetica Neue', Arial, sans-serif;
    background: var(--bg-primary);
    color: var(--text-primary);
    min-height: 100vh;
    min-height: 100dvh;
    line-height: 1.6;
    transition: background-color var(--transition-speed), color var(--transition-speed);
    overflow-x: hidden;
}

/* ==========================================
   4. УТИЛИТАРНЫЕ КЛАССЫ
   ========================================== */
.hidden {
    display: none !important;
}

.highlight {
    background: var(--bg-highlight);
    padding: 0.125rem 0.375rem;
    border-radius: 4px;
    color: var(--accent-primary);
    font-weight: 500;
}

/* ==========================================
   5. АНИМАЦИИ
   ========================================== */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to { opacity: 1; transform: translateY(0); }
}

@keyframes slideInRight {
    from { opacity: 0; transform: translateX(30px); }
    to { opacity: 1; transform: translateX(0); }
}

@keyframes slideInLeft {
    from { opacity: 0; transform: translateX(-30px); }
    to { opacity: 1; transform: translateX(0); }
}

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

@keyframes pulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.05); }
}

@keyframes bounce {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-5px); }
}

@keyframes float {
    0%, 100% { transform: translateY(0); }
    50% { transform: translateY(-8px); }
}

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

@keyframes summaryLoadingShimmer {
    from { transform: translateX(-100%); }
    to { transform: translateX(100%); }
}

@keyframes shake {
    0%, 100% { transform: translateX(0); }
    25% { transform: translateX(-5px); }
    75% { transform: translateX(5px); }
}

@keyframes setCompleted {
    0% { transform: scale(1); }
    50% { transform: scale(1.15); }
    100% { transform: scale(1); }
}

@keyframes resultSaved {
    0% { transform: scale(1); }
    50% { transform: scale(1.05); }
    100% { transform: scale(1); }
}

@keyframes cardAppear {
    from { opacity: 0; transform: translateY(20px) scale(0.95); }
    to { opacity: 1; transform: translateY(0) scale(1); }
}

.slide-in-right { animation: slideInRight 0.3s ease; }
.slide-in-left { animation: slideInLeft 0.3s ease; }

/* ==========================================
   6. LAYOUT - КОНТЕЙНЕР ПРИЛОЖЕНИЯ
   ========================================== */
.app-container {
    width: 100%;
    max-width: var(--app-content-max-width, 1180px);
    margin: 0 auto;
    padding: var(--spacing-md);
    min-height: 100vh;
    min-height: 100dvh;
    overflow-x: hidden;
}

.app-loader {
    position: fixed;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: rgba(7, 12, 20, 0.28);
    -webkit-backdrop-filter: blur(14px) saturate(125%);
    backdrop-filter: blur(14px) saturate(125%);
    display: none;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    gap: 0.875rem;
    z-index: 9999;
}

.app-loader.show {
    display: flex;
}

.app-loader-spinner {
    position: relative;
    z-index: 1;
    width: 48px;
    height: 48px;
    border: 3px solid rgba(255, 255, 255, 0.28);
    border-top-color: var(--accent-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

.app-loader-text {
    position: relative;
    z-index: 1;
    margin-top: 0;
    max-width: min(22rem, calc(100vw - 3rem));
    color: var(--text-primary);
    font-size: 0.875rem;
    font-weight: 600;
    text-align: center;
    text-shadow: 0 1px 1px rgba(0, 0, 0, 0.25);
}

.app-loader-note {
    position: relative;
    z-index: 1;
    max-width: min(22rem, calc(100vw - 3rem));
    margin: 0;
    color: var(--text-secondary);
    font-size: 0.8125rem;
    line-height: 1.45;
    text-align: center;
    text-shadow: 0 1px 1px rgba(0, 0, 0, 0.2);
}

.app-loader-note:empty {
    display: none;
}

@supports not ((backdrop-filter: blur(2px)) or (-webkit-backdrop-filter: blur(2px))) {
    .app-loader {
        background: rgba(7, 12, 20, 0.64);
    }
}

/* ==========================================
   7. HEADER
   ========================================== */
.app-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: var(--spacing-md) 0;
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    gap: var(--spacing-md);
    position: relative;
}

.app-title {
    display: flex;
    align-items: center;
    gap: 0.625rem;
    font-size: var(--font-size-2xl);
    font-weight: 700;
    margin: 0;
}

.app-title-text {
    background: var(--accent-gradient);
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    background-clip: text;
}

.app-logo {
    width: 3.01rem;
    height: 3.01rem;
    object-fit: contain;
    flex-shrink: 0;
}

.header-controls {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-shrink: 0;
}

/* Mode Switcher */
.mode-switcher {
    display: flex;
    background: var(--bg-input);
    border-radius: var(--border-radius-md);
    padding: 4px;
    border: 2px solid var(--border-color);
}

.mode-btn {
    padding: var(--spacing-sm) var(--spacing-md);
    border: none;
    background: transparent;
    color: var(--text-secondary);
    font-size: var(--font-size-base);
    font-weight: 600;
    cursor: pointer;
    border-radius: var(--border-radius-sm);
    transition: all var(--transition-speed);
    white-space: nowrap;
}

.mode-btn.active {
    background: var(--accent-gradient);
    color: white;
}

.mode-btn:hover:not(.active) {
    color: var(--accent-primary);
}

/* Theme Toggle */
.theme-toggle {
    position: relative;
    width: 50px;
    height: 28px;
    background: var(--bg-input);
    border-radius: 14px;
    border: 2px solid var(--border-color);
    cursor: pointer;
    transition: all var(--transition-speed);
    display: flex;
    align-items: center;
    padding: 0 3px;
    flex-shrink: 0;
}

.theme-toggle:hover {
    border-color: var(--accent-primary);
}

.theme-toggle-thumb {
    width: 20px;
    height: 20px;
    background: var(--accent-gradient);
    border-radius: var(--border-radius-full);
    transition: transform var(--transition-speed);
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 12px;
}

[data-theme="light"] .theme-toggle-thumb {
    transform: translateX(22px);
}

/* ==========================================
   8. КАРТОЧКИ (ОБЩИЙ КОМПОНЕНТ)
   ========================================== */
.card {
    background: var(--bg-card);
    border-radius: var(--border-radius-xl);
    padding: var(--spacing-lg);
    box-shadow: 0 4px 20px var(--shadow-color);
    border: 1px solid var(--border-color);
    transition: all var(--transition-speed);
    margin-bottom: var(--spacing-lg);
}

.card:hover {
    box-shadow: 0 8px 30px var(--shadow-color);
}

/* ==========================================
   9. КНОПКИ (ОБЩИЙ КОМПОНЕНТ)
   ========================================== */
.btn {
    flex: 1;
    min-height: 42px;
    padding: 0.58rem 1rem;
    border-radius: 12px;
    font-size: 0.83rem;
    font-weight: 700;
    font-family: var(--ui-font-display, 'Space Grotesk', 'Manrope', sans-serif);
    letter-spacing: 0.01em;
    cursor: pointer;
    transition: transform 0.2s ease, box-shadow 0.2s ease, border-color 0.2s ease, background-color 0.2s ease, color 0.2s ease;
    border: 1px solid transparent;
    box-shadow: none;
    display: flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    text-decoration: none;
}

.btn-primary {
    border-color: transparent;
    background: linear-gradient(
        135deg,
        var(--ui-accent-strong, #0f9f87) 0%,
        var(--ui-accent, #1ec8a2) 58%,
        var(--ui-warm, #ff9f43) 100%
    );
    color: #fff;
}

.btn-primary:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 10px 18px color-mix(in srgb, var(--ui-accent, #1ec8a2) 24%, transparent);
}

.btn-primary:disabled {
    opacity: 0.7;
    cursor: not-allowed;
    transform: none;
    box-shadow: none;
}

.btn-secondary {
    border-color: color-mix(in srgb, var(--ui-border, var(--border-color)) 84%, transparent);
    background: color-mix(in srgb, var(--ui-surface-soft, var(--bg-input)) 74%, transparent);
    color: var(--text-secondary);
}

.btn-secondary:hover {
    border-color: color-mix(in srgb, var(--ui-accent-alt, var(--accent-primary)) 58%, var(--ui-border, var(--border-color)));
    background: color-mix(in srgb, var(--ui-accent-alt, var(--accent-primary)) 10%, transparent);
    color: var(--text-primary);
}

.btn-success {
    border: 1px solid color-mix(in srgb, var(--success-color) 46%, var(--ui-border, var(--border-color)));
    background: linear-gradient(
        135deg,
        color-mix(in srgb, var(--success-color) 82%, #166534) 0%,
        color-mix(in srgb, var(--success-color) 66%, #22c55e) 100%
    );
    color: #fff;
}

.btn-success:hover:not(:disabled) {
    transform: translateY(-1px);
    box-shadow: 0 10px 18px color-mix(in srgb, var(--success-color) 28%, transparent);
}

.btn-sm {
    padding: var(--spacing-sm) 0.75rem;
    font-size: 0.8125rem;
    flex: 0 0 auto;
}

.btn-icon {
    padding: var(--spacing-sm);
    min-width: 36px;
}

/* ==========================================
   10. ФОРМЫ - ИНПУТЫ
   ========================================== */
.input-section {
    margin-bottom: var(--spacing-lg);
}

.input-group {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.input-field {
    flex: 1;
    min-width: 140px;
}

.input-label {
    display: block;
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
    text-transform: uppercase;
    letter-spacing: 0.5px;
}

.input-label-small {
    display: block;
    font-size: var(--font-size-sm);
    color: var(--text-muted);
    margin-bottom: var(--spacing-xs);
}

/* Weight Input */
.weight-input-wrapper {
    position: relative;
    display: flex;
    align-items: center;
}

.weight-input {
    width: 100%;
    padding: var(--spacing-md) 3rem var(--spacing-md) var(--spacing-md);
    font-size: var(--font-size-xl);
    font-weight: 600;
    background: var(--bg-input);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-md);
    color: var(--text-primary);
    transition: all var(--transition-speed);
    -moz-appearance: textfield;
}

.weight-input::-webkit-outer-spin-button,
.weight-input::-webkit-inner-spin-button {
    -webkit-appearance: none;
    margin: 0;
}

.weight-input:focus {
    outline: none;
    border-color: var(--accent-primary);
    box-shadow: 0 0 0 3px var(--bg-highlight);
}

.weight-input.error {
    border-color: var(--error-color);
}

.weight-unit {
    position: absolute;
    right: var(--spacing-md);
    color: var(--text-muted);
    font-weight: 600;
}

.weight-input-wrapper.small .weight-input {
    padding: 0.625rem 2.5rem 0.625rem 0.75rem;
    font-size: var(--font-size-md);
}

/* Reps Counter */
.reps-counter {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    background: var(--bg-input);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-md);
    padding: var(--spacing-sm);
}

.counter-btn {
    width: 44px;
    height: 44px;
    border-radius: var(--border-radius-full);
    border: none;
    background: var(--accent-gradient);
    color: white;
    font-size: var(--font-size-2xl);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-speed);
    user-select: none;
    -webkit-user-select: none;
}

.counter-btn:hover {
    transform: scale(1.05);
    box-shadow: 0 4px 15px var(--shadow-color);
}

.counter-btn:active {
    transform: scale(0.95);
}

.counter-btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.reps-display {
    min-width: 50px;
    text-align: center;
    font-size: var(--font-size-2xl);
    font-weight: 700;
    color: var(--text-primary);
}

/* Mini Reps Counter (for Ranks) */
.reps-counter-mini {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    padding: var(--spacing-xs);
}

.reps-counter-mini .counter-btn-mini {
    width: 36px;
    height: 36px;
    border-radius: var(--border-radius-full);
    border: none;
    background: var(--accent-gradient);
    color: white;
    font-size: var(--font-size-xl);
    font-weight: 600;
    cursor: pointer;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: all var(--transition-speed);
    user-select: none;
    -webkit-user-select: none;
}

.reps-counter-mini .counter-btn-mini:hover {
    transform: scale(1.05);
    box-shadow: 0 2px 8px var(--shadow-color);
}

.reps-counter-mini .counter-btn-mini:active {
    transform: scale(0.95);
}

.reps-counter-mini .counter-btn-mini:disabled {
    opacity: 0.5;
    cursor: not-allowed;
    transform: none;
}

.reps-counter-mini .reps-display-mini {
    min-width: 36px;
    text-align: center;
    font-size: var(--font-size-lg);
    font-weight: 700;
    color: var(--text-primary);
}

/* ==========================================
   11. СООБЩЕНИЯ ОБ ОШИБКАХ
   ========================================== */
.error-message {
    background: var(--error-bg);
    border: 1px solid var(--error-color);
    border-radius: var(--border-radius-sm);
    padding: 0.75rem var(--spacing-md);
    color: var(--error-color);
    font-size: var(--font-size-base);
    margin-top: var(--spacing-sm);
    display: none;
    align-items: center;
    gap: var(--spacing-sm);
}

.error-message.show {
    display: flex;
}

/* ==========================================
   12. НАСТРОЙКИ ОКРУГЛЕНИЯ
   ========================================== */
.settings-section {
    margin-bottom: var(--spacing-lg);
}

.settings-label {
    font-size: var(--font-size-base);
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 0.75rem;
    display: block;
}

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

.rounding-option {
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--bg-card);
    border: 2px solid var(--border-color);
    border-radius: var(--border-radius-sm);
    cursor: pointer;
    transition: all var(--transition-speed);
    font-size: var(--font-size-base);
    color: var(--text-secondary);
}

.rounding-option:hover {
    border-color: var(--accent-primary);
}

.rounding-option.active {
    background: var(--accent-gradient);
    border-color: transparent;
    color: white;
}