/* ========================================
           ENTERPRISE DESIGN SYSTEM
           Verze 1.0 - Leden 2025
           ======================================== */

        /* ===== CSS RESET ===== */
        * {
            margin: 0;
            padding: 0;
            box-sizing: border-box;
        }

        /* ===== CSS PROMĚNNÉ - BAREVNÁ PALETA ===== */
        :root {
            /* Základní neutrální barvy */
            --gray-900: #212529;
            --gray-800: #343a40;
            --gray-700: #495057;
            --gray-600: #6c757d;
            --gray-500: #adb5bd;
            --gray-400: #ced4da;
            --gray-300: #dee2e6;
            --gray-200: #e9ecef;
            --gray-100: #f8f9fa;
            --white: #ffffff;
            
            /* Akcentové barvy - používat velmi střídmě */
            --teal-accent: #5DBED3;
            --purple-accent: #9C27B0;
            --orange-accent: #FF9800;
            --green-accent: #4CAF50;
            --red-accent: #ef4444;
            --blue-accent: #2196F3;
            
            /* Systémové barvy */
            --border-default: #dee2e6;
            --border-hover: #ced4da;
            --shadow-sm: 0 1px 3px rgba(0,0,0,0.05);
            --shadow-md: 0 2px 4px rgba(0,0,0,0.05);
            --shadow-lg: 0 4px 8px rgba(0,0,0,0.08);
            
            /* Typografie */
            --font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Arial, sans-serif;
            --font-size-xs: 11px;
            --font-size-sm: 12px;
            --font-size-base: 13px;
            --font-size-md: 14px;
            --font-size-lg: 15px;
            --font-size-xl: 16px;
            
            /* Spacing */
            --spacing-xs: 4px;
            --spacing-sm: 8px;
            --spacing-md: 12px;
            --spacing-lg: 16px;
            --spacing-xl: 20px;
            --spacing-2xl: 24px;
            --spacing-3xl: 32px;
            
            /* Border radius */
            --radius-sm: 3px;
            --radius-md: 4px;
            --radius-lg: 6px;
        }

        /* ===== ZÁKLADNÍ STYLY ===== */
        body {
            font-family: var(--font-family);
            font-size: var(--font-size-base);
            line-height: 1.5;
            color: var(--gray-700);
            background-color: var(--gray-100);
        }

        /* ===== KONTEJNERY A LAYOUT ===== */
        .container {
            background: var(--white);
            border-radius: var(--radius-md);
            padding: 30px;
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--gray-200);
        }

        .section {
            margin-bottom: var(--spacing-3xl);
        }

        /* ===== TYPOGRAFIE ===== */
        h1, h2, h3, h4, h5, h6 {
            color: var(--gray-900);
            font-weight: 500;
            margin-bottom: var(--spacing-lg);
        }

        h1 {
            font-size: 28px;
            font-weight: 300;
            text-align: center;
            margin-bottom: var(--spacing-xl);
        }

        h2 {
            font-size: 20px;
            padding-bottom: var(--spacing-md);
            border-bottom: 1px solid var(--gray-200);
            margin-bottom: var(--spacing-xl);
        }

        h3 {
            font-size: var(--font-size-md);
            text-transform: uppercase;
            letter-spacing: 0.5px;
            color: var(--gray-600);
            font-weight: 600;
        }

        p {
            margin-bottom: var(--spacing-lg);
            line-height: 1.6;
        }

        /* ===== TLAČÍTKA - ZÁKLADNÍ STYL ===== */
        .btn {
            /* Základní vlastnosti */
            display: inline-flex;
            align-items: center;
            gap: var(--spacing-sm);
            padding: 10px 18px;
            
            /* Vzhled */
            background-color: var(--gray-100);
            color: var(--gray-700);
            border: 1px solid var(--gray-300);
            border-radius: var(--radius-sm);
            
            /* Typografie */
            font-family: var(--font-family);
            font-size: var(--font-size-base);
            font-weight: 500;
            text-transform: uppercase;
            letter-spacing: 0.5px;
            text-decoration: none;
            
            /* Interakce */
            cursor: pointer;
            transition: all 0.15s ease;
            position: relative;
            overflow: hidden;
            
            /* Reset */
            outline: none;
            -webkit-appearance: none;
            -moz-appearance: none;
            appearance: none;
        }

        /* Hover stav */
        .btn:hover {
            background-color: var(--white);
            border-color: var(--gray-400);
            transform: translateY(-1px);
            box-shadow: var(--shadow-md);
        }

        /* Aktivní/Stisknutý stav */
        .btn:active {
            transform: translateY(0);
            box-shadow: none;
        }

        /* Focus stav */
        .btn:focus {
            outline: 2px solid var(--gray-400);
            outline-offset: 2px;
        }

        /* ===== VARIANTY TLAČÍTEK ===== */
        
        /* Aktivní tlačítko */
        .btn.active {
            background-color: var(--gray-800);
            color: var(--white);
            border-color: var(--gray-800);
        }
        .btn.active:hover {
            background-color: var(--gray-900);
            border-color: var(--gray-900);
        }

        /* Primární tlačítko */
        .btn.primary {
            background-color: var(--gray-800);
            color: var(--white);
            border-color: var(--gray-800);
        }
        .btn.primary:hover {
            background-color: var(--gray-900);
            border-color: var(--gray-900);
        }

        /* Recording/Nebezpečný stav */
        .btn.recording,
        .btn.danger-active {
            background-color: var(--red-accent);
            color: var(--white);
            border-color: var(--red-accent);
            animation: pulse 1.5s infinite;
        }

        @keyframes pulse {
            0%, 100% { opacity: 1; }
            50% { opacity: 0.8; }
        }

        /* ===== VELIKOSTI TLAČÍTEK ===== */
        .btn.large {
            padding: 14px 28px;
            font-size: var(--font-size-md);
        }

        .btn.small {
            padding: 6px 12px;
            font-size: var(--font-size-xs);
        }

        .btn.tiny {
            padding: 4px 8px;
            font-size: 10px;
            text-transform: none;
        }

        /* Pouze ikona */
        .btn.icon-only {
            padding: 8px;
            min-width: 36px;
            justify-content: center;
        }

        .btn.icon-only.small {
            padding: 6px;
            min-width: 30px;
        }

        /* ===== KATEGORIE S BAREVNÝM AKCENTEM ===== */
        .btn.telefon::before,
        .btn.schuzka::before,
        .btn.poznamka::before,
        .btn.ukol::before {
            content: '';
            position: absolute;
            left: 0;
            top: 0;
            bottom: 0;
            width: 3px;
            transition: width 0.15s ease;
        }

        .btn.telefon::before { background-color: var(--teal-accent); }
        .btn.schuzka::before { background-color: var(--purple-accent); }
        .btn.poznamka::before { background-color: var(--orange-accent); }
        .btn.ukol::before { background-color: var(--green-accent); }

        .btn.telefon:hover::before,
        .btn.schuzka:hover::before,
        .btn.poznamka:hover::before,
        .btn.ukol:hover::before {
            width: 5px;
        }

        /* ===== IKONY A EMOJI ===== */
        .icon {
            color: var(--gray-600);
            font-style: normal;
            filter: grayscale(100%);
            opacity: 0.8;
        }

        .btn.active .icon,
        .btn.primary .icon,
        .btn.recording .icon {
            color: var(--white);
            opacity: 1;
        }

        /* Prioritní kolečka - jediné barevné ikony */
        .priority-dot {
            display: inline-block;
            width: 10px;
            height: 10px;
            border-radius: 50%;
            margin-right: 6px;
        }

        .priority-high .priority-dot { background-color: var(--red-accent); }
        .priority-normal .priority-dot { background-color: var(--orange-accent); }
        .priority-low .priority-dot { background-color: var(--green-accent); }

        /* ===== FORMULÁŘOVÉ PRVKY ===== */
        
        /* Textové pole */
        .input,
        .textarea {
            width: 100%;
            padding: var(--spacing-lg);
            border: 1px solid var(--border-default);
            border-radius: var(--radius-sm);
            font-family: var(--font-family);
            font-size: var(--font-size-lg);
            color: var(--gray-900);
            background-color: var(--white);
            transition: all 0.2s ease;
            resize: vertical;
        }

        .textarea {
            min-height: 200px;
            line-height: 1.5;
        }

        .input:focus,
        .textarea:focus {
            outline: none;
            border-color: var(--gray-500);
        }

        .input::placeholder,
        .textarea::placeholder {
            color: var(--gray-400);
        }

        /* Vyhledávací pole */
        .search-input {
            padding: 10px 16px;
            font-size: var(--font-size-md);
        }

        /* ===== INFORMAČNÍ BLOKY ===== */
        
        /* Status bar */
        .status-bar {
            padding: 12px 15px;
            background-color: var(--gray-100);
            border-radius: var(--radius-sm);
            font-size: var(--font-size-base);
            color: var(--gray-600);
            border: 1px solid var(--gray-200);
            text-align: center;
        }

        .status-bar.success {
            background-color: #f0fdf4;
            color: var(--green-accent);
            border-color: #bbf7d0;
        }

        .status-bar.error {
            background-color: #fef2f2;
            color: var(--red-accent);
            border-color: #fecaca;
        }

        /* Storage info */
        .storage-info {
            padding: 10px 15px;
            background-color: var(--gray-100);
            border-radius: var(--radius-sm);
            font-size: var(--font-size-sm);
            color: var(--gray-600);
            display: flex;
            justify-content: space-between;
            border: 1px solid var(--gray-200);
        }

        /* ===== KOMPONENTY ===== */
        
        /* Toggle/Rozbalovací sekce */
        .toggle-section {
            padding: 12px 15px;
            background-color: var(--gray-100);
            border: 1px solid var(--gray-200);
            border-radius: var(--radius-sm);
            cursor: pointer;
            display: flex;
            justify-content: space-between;
            align-items: center;
            font-size: var(--font-size-md);
            font-weight: 500;
            color: var(--gray-700);
            transition: all 0.2s ease;
        }

        .toggle-section:hover {
            background-color: var(--gray-200);
        }

        .toggle-arrow {
            transition: transform 0.3s ease;
        }

        .toggle-section.expanded .toggle-arrow {
            transform: rotate(180deg);
        }

        /* Historie položka */
        .history-item {
            background-color: var(--white);
            border: 1px solid var(--gray-200);
            border-radius: var(--radius-sm);
            padding: var(--spacing-lg);
            margin-bottom: var(--spacing-md);
            border-left: 3px solid var(--gray-300);
            transition: all 0.2s ease;
        }

        .history-item:hover {
            box-shadow: var(--shadow-md);
            transform: translateY(-1px);
        }

        /* Barevné akcenty pro typy */
        .history-item.telefon { border-left-color: var(--teal-accent); }
        .history-item.schuzka { border-left-color: var(--purple-accent); }
        .history-item.poznamka { border-left-color: var(--orange-accent); }
        .history-item.ukol { border-left-color: var(--green-accent); }

        .history-item-header {
            display: flex;
            justify-content: space-between;
            margin-bottom: var(--spacing-sm);
            font-size: var(--font-size-sm);
            color: var(--gray-600);
        }

        .history-item-preview {
            font-size: var(--font-size-md);
            color: var(--gray-700);
            line-height: 1.5;
        }

        /* Filter container */
        .filter-container {
            background-color: var(--gray-100);
            padding: var(--spacing-lg);
            border-radius: var(--radius-lg);
            border: 1px solid var(--gray-200);
        }

        /* ===== SPECIÁLNÍ KOMPONENTY ===== */
        
        /* Indikátor nahrávání */
        .indicator {
            width: 8px;
            height: 8px;
            background-color: var(--gray-400);
            border-radius: 50%;
            display: inline-block;
        }

        .indicator.active {
            background-color: var(--red-accent);
        }

        /* Filter tlačítka */
        .btn.filter {
            padding: 6px 14px;
            font-size: var(--font-size-sm);
            background-color: var(--white);
            border-color: var(--gray-300);
            text-transform: none;
        }

        .btn.filter.active {
            background-color: var(--gray-800);
            color: var(--white);
            border-color: var(--gray-800);
        }

        /* ===== UTILITY TŘÍDY ===== */
        .text-center { text-align: center; }
        .text-left { text-align: left; }
        .text-right { text-align: right; }
        
        .mt-sm { margin-top: var(--spacing-sm); }
        .mt-md { margin-top: var(--spacing-md); }
        .mt-lg { margin-top: var(--spacing-lg); }
        .mt-xl { margin-top: var(--spacing-xl); }
        
        .mb-sm { margin-bottom: var(--spacing-sm); }
        .mb-md { margin-bottom: var(--spacing-md); }
        .mb-lg { margin-bottom: var(--spacing-lg); }
        .mb-xl { margin-bottom: var(--spacing-xl); }

        /* ===== PŘEPÍNAČ TÉMAT ===== */
        
        /* Inline varianta */
        .theme-switcher {
            display: inline-flex;
            gap: 8px;
            padding: 4px;
            background-color: white;
            border-radius: 20px;
            box-shadow: 0 2px 8px rgba(0,0,0,0.1);
        }

        .theme-btn {
            width: 32px;
            height: 32px;
            border: none;
            border-radius: 50%;
            background-color: transparent;
            cursor: pointer;
            padding: 4px;
            transition: all 0.2s ease;
            position: relative;
        }

        .theme-btn:hover {
            transform: scale(1.1);
        }

        .theme-btn.active {
            background-color: var(--gray-100);
        }

        .theme-btn.active .theme-dot {
            box-shadow: 0 0 0 2px white, 0 0 0 4px var(--gray-400), inset 0 2px 4px rgba(0,0,0,0.2);
        }

        .theme-dot {
            display: block;
            width: 100%;
            height: 100%;
            border-radius: 50%;
            box-shadow: inset 0 2px 4px rgba(0,0,0,0.2);
        }

        /* Plovoucí varianta */
        .theme-switcher-floating {
            position: fixed;
            top: 20px;
            right: 20px;
            z-index: 1000;
        }

        .theme-toggle-btn {
            width: 48px;
            height: 48px;
            border: none;
            border-radius: 50%;
            background-color: white;
            box-shadow: 0 4px 12px rgba(0,0,0,0.15);
            cursor: pointer;
            display: flex;
            align-items: center;
            justify-content: center;
            gap: 4px;
            padding: 12px;
            transition: all 0.3s ease;
            flex-wrap: wrap;
        }

        .theme-toggle-btn:hover {
            transform: scale(1.05);
            box-shadow: 0 6px 16px rgba(0,0,0,0.2);
        }

        .theme-toggle-btn .theme-dot {
            width: 8px;
            height: 8px;
            border-radius: 50%;
            flex-shrink: 0;
        }

        .theme-dropdown {
            position: absolute;
            top: 60px;
            right: 0;
            background-color: white;
            border-radius: 8px;
            box-shadow: 0 4px 16px rgba(0,0,0,0.1);
            padding: 8px;
            min-width: 150px;
            opacity: 0;
            visibility: hidden;
            transform: translateY(-10px);
            transition: all 0.3s ease;
        }

        .theme-switcher-floating:hover .theme-dropdown {
            opacity: 1;
            visibility: visible;
            transform: translateY(0);
        }

        .theme-dropdown .theme-btn {
            width: 100%;
            justify-content: flex-start;
            gap: 12px;
            padding: 8px 12px;
            border-radius: 6px;
            display: flex;
            align-items: center;
        }

        .theme-dropdown .theme-btn:hover {
            background-color: var(--gray-100);
        }

        .theme-dropdown .theme-dot {
            width: 16px;
            height: 16px;
            border-radius: 50%;
            flex-shrink: 0;
        }

        .theme-name {
            font-size: 13px;
            color: var(--gray-700);
        }

        /* ===== DEMO STYLES ===== */
        .demo-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 40px 20px;
        }

        .demo-section {
            background: var(--white);
            border-radius: var(--radius-lg);
            padding: var(--spacing-3xl);
            margin-bottom: var(--spacing-3xl);
            box-shadow: var(--shadow-sm);
            border: 1px solid var(--gray-200);
        }

        .button-group {
            display: flex;
            gap: var(--spacing-md);
            flex-wrap: wrap;
            margin-bottom: var(--spacing-xl);
            align-items: center;
        }

        .code-block {
            background-color: var(--gray-900);
            color: #e0e0e0;
            padding: var(--spacing-xl);
            border-radius: var(--radius-lg);
            font-family: 'Consolas', 'Monaco', monospace;
            font-size: var(--font-size-sm);
            overflow-x: auto;
            margin: var(--spacing-lg) 0;
        }

        .color-palette {
            display: grid;
            grid-template-columns: repeat(auto-fit, minmax(150px, 1fr));
            gap: var(--spacing-lg);
            margin-bottom: var(--spacing-3xl);
        }

        .color-box {
            text-align: center;
        }

        .color-swatch {
            height: 60px;
            border-radius: var(--radius-md);
            border: 1px solid var(--gray-300);
            margin-bottom: var(--spacing-sm);
            display: flex;
            align-items: center;
            justify-content: center;
            font-size: var(--font-size-sm);
            font-weight: 500;
        }

        .color-name {
            font-size: var(--font-size-sm);
            color: var(--gray-600);
        }