:root {
    --primary: #74B9FF;
    --secondary: #0984E3;
    --accent: #00CEC9;
    --bg-base: #0A0F1A;
    --bg-panel: rgba(255, 255, 255, 0.03);
    --bg-panel-hover: rgba(255, 255, 255, 0.06);
    --text-primary: #FFFFFF;
    --text-secondary: #A0ABC0;
    --border-color: rgba(255, 255, 255, 0.1);
    --success: #00CEC9;
    --danger: #FF7675;
    --warning: #FDCB6E;
    --border-radius: 12px;
    --font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    --glass-blur: blur(16px);
}

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

body {
    font-family: var(--font-family);
    background-color: var(--bg-base);
    color: var(--text-primary);
    min-height: 100vh;
    display: flex;
    overflow-x: hidden;
}

/* App Container */
.app-container {
    display: flex;
    width: 100%;
    min-height: 100vh;
}

/* Sidebar */
.sidebar {
    width: 280px;
    background: var(--bg-panel);
    backdrop-filter: var(--glass-blur);
    border-right: 1px solid var(--border-color);
    display: flex;
    flex-direction: column;
    padding: 24px;
    gap: 32px;
    flex-shrink: 0;
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo h1 {
    font-size: 1.25rem;
    font-weight: 700;
    background: linear-gradient(135deg, var(--primary), var(--accent));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
}

.sidebar-section h3 {
    font-size: 0.85rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--text-secondary);
    margin-bottom: 16px;
    font-weight: 600;
}

/* Templates */
.template-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 12px;
}

.template-btn {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    color: var(--text-secondary);
    padding: 10px;
    border-radius: 8px;
    font-size: 0.85rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: center;
}

.template-btn:hover {
    background: var(--bg-panel-hover);
    color: var(--text-primary);
    border-color: var(--primary);
}

/* Add Components */
.add-components {
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.add-btn {
    display: flex;
    align-items: center;
    gap: 10px;
    background: transparent;
    border: 1px dashed var(--border-color);
    color: var(--text-primary);
    padding: 12px 16px;
    border-radius: var(--border-radius);
    font-size: 0.95rem;
    cursor: pointer;
    transition: all 0.2s ease;
    text-align: left;
}

.add-btn span {
    color: var(--primary);
    font-weight: bold;
    font-size: 1.1rem;
}

.add-btn:hover {
    background: var(--bg-panel);
    border-color: var(--primary);
    transform: translateY(-2px);
}

/* Actions */
.action-btn {
    width: 100%;
    padding: 14px;
    background: var(--primary);
    color: #000;
    border: none;
    border-radius: var(--border-radius);
    font-size: 0.95rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.2s ease;
    margin-bottom: 12px;
}

.action-btn:hover {
    background: var(--secondary);
    color: #fff;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(116, 185, 255, 0.3);
}

.action-btn.outline {
    background: transparent;
    border: 1px solid var(--primary);
    color: var(--primary);
}

.action-btn.outline:hover {
    background: rgba(116, 185, 255, 0.1);
}

.text-btn {
    background: transparent;
    border: none;
    color: var(--danger);
    font-size: 0.85rem;
    cursor: pointer;
    font-weight: 500;
}

.text-btn:hover {
    text-decoration: underline;
}

/* Main Content */
.main-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    height: 100vh;
    overflow-y: auto;
}

.topbar {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 24px 40px;
    border-bottom: 1px solid var(--border-color);
    background: rgba(10, 15, 26, 0.8);
    backdrop-filter: var(--glass-blur);
    position: sticky;
    top: 0;
    z-index: 10;
}

/* Scaling Control */
.scaling-control {
    width: 300px;
}

.scaling-control label {
    display: block;
    margin-bottom: 12px;
    font-size: 0.9rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.scaling-control label span {
    color: var(--primary);
    font-weight: 700;
}

input[type=range] {
    -webkit-appearance: none;
    width: 100%;
    background: transparent;
    margin-bottom: 8px;
}

input[type=range]::-webkit-slider-thumb {
    -webkit-appearance: none;
    height: 20px;
    width: 20px;
    border-radius: 50%;
    background: var(--primary);
    cursor: pointer;
    margin-top: -8px;
    box-shadow: 0 0 10px rgba(116, 185, 255, 0.5);
    transition: transform 0.1s;
}

input[type=range]::-webkit-slider-thumb:hover {
    transform: scale(1.2);
}

input[type=range]::-webkit-slider-runnable-track {
    width: 100%;
    height: 4px;
    cursor: pointer;
    background: var(--border-color);
    border-radius: 2px;
}

.scale-ticks {
    display: flex;
    justify-content: space-between;
    font-size: 0.75rem;
    color: var(--text-secondary);
}

/* View Toggle */
.view-toggle {
    display: flex;
    background: var(--bg-panel);
    border-radius: 8px;
    padding: 4px;
    border: 1px solid var(--border-color);
}

.toggle-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    padding: 8px 16px;
    border-radius: 6px;
    font-size: 0.9rem;
    font-weight: 500;
    cursor: pointer;
    transition: all 0.2s ease;
}

.toggle-btn.active {
    background: var(--primary);
    color: #000;
}

/* Content Body */
.content-body {
    padding: 40px;
    max-width: 1400px;
    margin: 0 auto;
    width: 100%;
}

/* Provider Comparison Row */
.provider-comparison {
    display: flex;
    gap: 24px;
    margin-bottom: 48px;
    overflow-x: auto;
    padding-bottom: 16px;
}

.provider-card {
    flex: 1;
    min-width: 260px;
    background: linear-gradient(180deg, rgba(255,255,255,0.05) 0%, rgba(255,255,255,0.01) 100%);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 24px;
    position: relative;
    overflow: hidden;
    transition: transform 0.3s ease, box-shadow 0.3s ease;
    display: flex;
    flex-direction: column;
}

.provider-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    border-color: rgba(116, 185, 255, 0.3);
}

.provider-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 4px;
}

#card-aws::before { background: #FF9900; }
#card-gcp::before { background: #4285F4; }
#card-azure::before { background: #00A4EF; }
#card-vercel::before { background: #FFFFFF; }
#card-fly::before { background: #7B16FF; }

.provider-header {
    margin-bottom: 24px;
}

.provider-header h3 {
    font-size: 1.1rem;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 12px;
}

.total-cost {
    font-size: 2.5rem;
    font-weight: 700;
    color: var(--text-primary);
    letter-spacing: -0.02em;
    display: flex;
    align-items: baseline;
    gap: 4px;
}

.total-cost::after {
    content: '/mo';
    font-size: 1rem;
    color: var(--text-secondary);
    font-weight: 500;
}

.yearly-view .total-cost::after {
    content: '/yr';
}

.cost-breakdown {
    list-style: none;
    flex: 1;
    margin-bottom: 24px;
}

.cost-breakdown li {
    display: flex;
    justify-content: space-between;
    font-size: 0.9rem;
    padding: 10px 0;
    border-bottom: 1px solid var(--border-color);
    color: var(--text-secondary);
}

.cost-breakdown li span:last-child {
    color: var(--text-primary);
    font-weight: 500;
}

.cost-breakdown li:last-child {
    border-bottom: none;
}

.free-tier-indicator {
    display: inline-block;
    padding: 6px 12px;
    border-radius: 20px;
    font-size: 0.75rem;
    font-weight: 600;
    background: rgba(0, 206, 201, 0.1);
    color: var(--success);
    text-align: center;
    border: 1px solid rgba(0, 206, 201, 0.2);
    opacity: 0;
    transition: opacity 0.3s;
}

.free-tier-indicator.visible {
    opacity: 1;
}

/* Configured Components */
.section-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: 24px;
}

.section-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.component-list {
    display: flex;
    flex-direction: column;
    gap: 16px;
}

.empty-state {
    text-align: center;
    padding: 64px 24px;
    background: var(--bg-panel);
    border: 1px dashed var(--border-color);
    border-radius: var(--border-radius);
    color: var(--text-secondary);
}

.empty-state svg {
    margin-bottom: 16px;
    color: var(--border-color);
}

.empty-state p {
    font-size: 1.1rem;
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: 8px;
}

.empty-state span {
    font-size: 0.9rem;
}

.component-item {
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    padding: 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    transition: all 0.2s ease;
}

.component-item:hover {
    border-color: var(--primary);
    background: var(--bg-panel-hover);
}

.comp-info {
    display: flex;
    align-items: center;
    gap: 16px;
}

.comp-icon {
    width: 48px;
    height: 48px;
    border-radius: 12px;
    background: rgba(116, 185, 255, 0.1);
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--primary);
    font-size: 1.5rem;
    font-weight: bold;
}

.comp-details h4 {
    font-size: 1.05rem;
    margin-bottom: 4px;
}

.comp-details p {
    font-size: 0.85rem;
    color: var(--text-secondary);
}

.comp-actions {
    display: flex;
    gap: 12px;
    align-items: center;
}

.remove-comp-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    cursor: pointer;
    padding: 8px;
    border-radius: 8px;
    transition: all 0.2s ease;
}

.remove-comp-btn:hover {
    color: var(--danger);
    background: rgba(255, 118, 117, 0.1);
}

/* Modals */
.modal-overlay {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.7);
    backdrop-filter: blur(8px);
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 100;
    opacity: 0;
    pointer-events: none;
    transition: opacity 0.3s ease;
}

.modal-overlay.active {
    opacity: 1;
    pointer-events: all;
}

.modal {
    background: var(--bg-base);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    width: 100%;
    max-width: 500px;
    box-shadow: 0 24px 48px rgba(0, 0, 0, 0.5);
    transform: translateY(20px);
    transition: transform 0.3s ease;
}

.modal-overlay.active .modal {
    transform: translateY(0);
}

.modal-header {
    padding: 24px;
    border-bottom: 1px solid var(--border-color);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.modal-header h2 {
    font-size: 1.25rem;
    font-weight: 600;
}

.close-btn {
    background: transparent;
    border: none;
    color: var(--text-secondary);
    font-size: 1.5rem;
    cursor: pointer;
    transition: color 0.2s;
}

.close-btn:hover {
    color: var(--text-primary);
}

.modal-body {
    padding: 24px;
}

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

.form-group label {
    display: block;
    margin-bottom: 8px;
    font-size: 0.9rem;
    color: var(--text-secondary);
}

.form-control {
    width: 100%;
    padding: 12px 16px;
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 0.95rem;
    transition: border-color 0.2s;
}

.form-control:focus {
    outline: none;
    border-color: var(--primary);
}

select.form-control {
    appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg width='24' height='24' viewBox='0 0 24 24' fill='none' xmlns='http://www.w3.org/2000/svg'%3E%3Cpath d='M6 9L12 15L18 9' stroke='%23A0ABC0' stroke-width='2' stroke-linecap='round' stroke-linejoin='round'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 12px center;
    padding-right: 40px;
}

.modal-footer {
    padding: 24px;
    border-top: 1px solid var(--border-color);
    display: flex;
    justify-content: flex-end;
    gap: 16px;
}

.modal-footer .action-btn {
    width: auto;
    margin-bottom: 0;
    padding: 10px 24px;
}

/* Toast */
.toast {
    position: fixed;
    bottom: 30px;
    right: 30px;
    background: var(--bg-panel);
    border: 1px solid var(--border-color);
    color: var(--text-primary);
    padding: 16px 24px;
    border-radius: 8px;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
    transform: translateY(100px);
    opacity: 0;
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    z-index: 1000;
    backdrop-filter: var(--glass-blur);
}

.toast.visible {
    transform: translateY(0);
    opacity: 1;
}

@media (max-width: 1024px) {
    .app-container {
        flex-direction: column;
    }
    
    .sidebar {
        width: 100%;
        border-right: none;
        border-bottom: 1px solid var(--border-color);
        padding: 20px;
    }
    
    .template-grid {
        grid-template-columns: repeat(4, 1fr);
    }
}

@media (max-width: 768px) {
    .topbar {
        flex-direction: column;
        align-items: flex-start;
        gap: 20px;
    }
    
    .scaling-control {
        width: 100%;
    }
    
    .template-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}