:root {
            --primary: #2563eb;
            --primary-dark: #1e40af;
            --secondary: #8b5cf6;
            --success: #10b981;
            --danger: #ef4444;
            --warning: #f59e0b;
            --bg-primary: #ffffff;
            --bg-secondary: #1e293b;
            --bg-tertiary: #334155;
            --text-primary: #f1f5f9;
            --text-secondary: #cbd5e1;
            --text-muted: #94a3b8;
            --border: #475569;
            --shadow: rgba(0, 0, 0, 0.3);
            --page-text: #0f172a;
        }

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

        body {
            font-family: 'Poppins', sans-serif;
            background: #ffffff;
            color: var(--page-text);
            min-height: 100vh;
            overflow-x: hidden;
        }

        .app-container {
            max-width: 1200px;
            margin: 0 auto;
            padding: 20px;
            animation: fadeIn 0.6s ease-out;
        }

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

        header {
            display: flex;
            justify-content: space-between;
            align-items: center;
            padding: 20px 0;
            margin-bottom: 40px;
            border-bottom: 2px solid #e2e8f0;
        }

        .logo {
            font-size: 28px;
            font-weight: 700;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            letter-spacing: -0.5px;
        }

        .nav-buttons {
            display: flex;
            gap: 10px;
        }

        .btn {
            padding: 10px 20px;
            border: none;
            border-radius: 8px;
            font-family: 'Poppins', sans-serif;
            font-weight: 500;
            font-size: 14px;
            cursor: pointer;
            transition: all 0.3s ease;
            display: inline-flex;
            align-items: center;
            gap: 8px;
        }

        .btn-primary {
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            color: white;
            box-shadow: 0 4px 12px rgba(37, 99, 235, 0.3);
        }

        .btn-primary:hover {
            transform: translateY(-2px);
            box-shadow: 0 6px 20px rgba(37, 99, 235, 0.4);
        }

        .btn-secondary {
            background: var(--bg-tertiary);
            color: var(--text-primary);
            border: 1px solid var(--border);
        }

        .btn-secondary:hover {
            background: var(--border);
            transform: translateY(-1px);
        }

        .card {
            background: var(--bg-secondary);
            border-radius: 16px;
            padding: 30px;
            margin-bottom: 30px;
            box-shadow: 0 8px 24px var(--shadow);
            border: 1px solid var(--border);
            animation: slideUp 0.5s ease-out;
        }

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

        .card-title {
            font-size: 22px;
            font-weight: 600;
            margin-bottom: 20px;
            color: var(--text-primary);
        }

        .form-group {
            margin-bottom: 20px;
        }

        label {
            display: block;
            margin-bottom: 8px;
            font-weight: 500;
            color: var(--text-secondary);
            font-size: 14px;
        }

        input[type="text"],
        input[type="email"],
        input[type="date"],
        select {
            width: 100%;
            padding: 12px 16px;
            background: var(--bg-tertiary);
            border: 2px solid var(--border);
            border-radius: 8px;
            color: var(--text-primary);
            font-family: 'Poppins', sans-serif;
            font-size: 14px;
            transition: all 0.3s ease;
        }

        input:focus,
        select:focus {
            outline: none;
            border-color: var(--primary);
            box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
        }

        .pattern-builder {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(60px, 1fr));
            gap: 10px;
            margin-top: 10px;
        }

        .day-toggle {
            padding: 12px;
            background: var(--bg-tertiary);
            border: 2px solid var(--border);
            border-radius: 8px;
            cursor: pointer;
            text-align: center;
            font-weight: 500;
            transition: all 0.3s ease;
            font-family: 'JetBrains Mono', monospace;
        }

        .day-toggle.on {
            background: linear-gradient(135deg, var(--success), #059669);
            border-color: var(--success);
            color: white;
            box-shadow: 0 4px 12px rgba(16, 185, 129, 0.3);
        }

        .day-toggle.off {
            background: var(--bg-tertiary);
            border-color: var(--border);
            opacity: 0.6;
        }

        .status-card {
            padding: 30px;
            border-radius: 16px;
            text-align: center;
            margin-bottom: 30px;
            animation: pulse 0.5s ease-out;
        }

        @keyframes pulse {
            0% {
                transform: scale(0.95);
            }
            50% {
                transform: scale(1.02);
            }
            100% {
                transform: scale(1);
            }
        }

        .status-card.working {
            background: linear-gradient(135deg, var(--success), #059669);
            box-shadow: 0 8px 32px rgba(16, 185, 129, 0.3);
        }

        .status-card.off {
            background: linear-gradient(135deg, var(--danger), #dc2626);
            box-shadow: 0 8px 32px rgba(239, 68, 68, 0.3);
        }

        .status-icon {
            font-size: 48px;
            margin-bottom: 16px;
        }

        .status-text {
            font-size: 32px;
            font-weight: 700;
            margin-bottom: 8px;
        }

        .status-date {
            font-size: 16px;
            opacity: 0.9;
        }

        .calendar-view {
            display: grid;
            grid-template-columns: repeat(7, 1fr);
            gap: 8px;
            margin-top: 20px;
        }

        .calendar-header {
            text-align: center;
            padding: 12px;
            font-weight: 600;
            color: var(--text-secondary);
            font-size: 12px;
            text-transform: uppercase;
            letter-spacing: 0.5px;
        }

        .calendar-day {
            aspect-ratio: 1;
            border-radius: 8px;
            display: flex;
            flex-direction: column;
            align-items: center;
            justify-content: center;
            font-weight: 500;
            transition: all 0.3s ease;
            position: relative;
            cursor: pointer;
            font-family: 'JetBrains Mono', monospace;
        }

        .calendar-day:hover {
            transform: scale(1.05);
        }

        .calendar-day.working {
            background: linear-gradient(135deg, var(--success), #059669);
            box-shadow: 0 2px 8px rgba(16, 185, 129, 0.3);
        }

        .calendar-day.off {
            background: var(--bg-tertiary);
            opacity: 0.5;
        }

        .calendar-day.today {
            border: 2px solid var(--warning);
            box-shadow: 0 0 0 3px rgba(245, 158, 11, 0.2);
        }

        .calendar-day-num {
            font-size: 16px;
        }

        .calendar-day-label {
            font-size: 10px;
            margin-top: 4px;
            opacity: 0.8;
        }

        .view {
            display: none;
            animation: fadeIn 0.4s ease-out;
        }

        .view.active {
            display: block;
        }

        .preset-patterns {
            display: grid;
            grid-template-columns: repeat(auto-fill, minmax(250px, 1fr));
            gap: 15px;
            margin-top: 20px;
        }

        .preset-card {
            background: var(--bg-tertiary);
            padding: 20px;
            border-radius: 12px;
            border: 2px solid var(--border);
            cursor: pointer;
            transition: all 0.3s ease;
        }

        .preset-card:hover {
            border-color: var(--primary);
            transform: translateY(-2px);
            box-shadow: 0 4px 16px rgba(37, 99, 235, 0.2);
        }

        .preset-title {
            font-weight: 600;
            margin-bottom: 8px;
            color: var(--text-primary);
        }

        .preset-description {
            font-size: 12px;
            color: var(--text-muted);
            margin-bottom: 12px;
        }

        .preset-pattern {
            font-family: 'JetBrains Mono', monospace;
            font-size: 11px;
            color: var(--text-secondary);
        }

        .month-nav {
            display: flex;
            justify-content: space-between;
            align-items: center;
            margin-bottom: 20px;
        }

        .month-nav h3 {
            font-size: 20px;
            font-weight: 600;
        }

        .empty-state {
            text-align: center;
            padding: 60px 20px;
            color: var(--text-muted);
        }

        .empty-state-icon {
            font-size: 64px;
            margin-bottom: 20px;
            opacity: 0.5;
        }

        @media (max-width: 768px) {
            .calendar-view {
                grid-template-columns: repeat(7, 1fr);
                gap: 4px;
            }

            .calendar-day-label {
                display: none;
            }

            .preset-patterns {
                grid-template-columns: 1fr;
            }

            header {
                flex-direction: column;
                gap: 15px;
                padding: 15px 0;
                margin-bottom: 20px;
            }

            .logo {
                font-size: 24px;
            }

            .nav-buttons {
                width: 100%;
                justify-content: center;
                flex-wrap: wrap;
                gap: 8px;
            }

            .nav-buttons .btn {
                padding: 8px 12px;
                font-size: 13px;
            }
        }

        /* Hero Section */
        .hero-section {
            text-align: center;
            padding: 40px 20px;
            margin-bottom: 30px;
            background: linear-gradient(135deg, var(--bg-secondary) 0%, #0f172a 100%);
            border-radius: 20px;
            border: 1px solid var(--border);
        }

        .hero-icon {
            font-size: 56px;
            margin-bottom: 16px;
        }

        .hero-title {
            font-size: 32px;
            font-weight: 700;
            background: linear-gradient(135deg, var(--primary), var(--secondary));
            -webkit-background-clip: text;
            -webkit-text-fill-color: transparent;
            background-clip: text;
            margin-bottom: 16px;
        }

        .hero-description {
            font-size: 16px;
            color: var(--text-secondary);
            max-width: 600px;
            margin: 0 auto;
            line-height: 1.7;
        }

        @media (max-width: 768px) {
            .hero-section {
                padding: 30px 15px;
            }

            .hero-title {
                font-size: 24px;
            }

            .hero-description {
                font-size: 14px;
            }
        }