/* 
    Author: Tobias Norheim
    Industrial Design Process Checklist
    Blueprint-inspired visual identity
*/

:root {
    /* Blueprint Color Palette */
    --blueprint-blue: #1e3a8a;
    --blueprint-blue-light: #3b82f6;
    --blueprint-blue-lighter: #60a5fa;
    --blueprint-blue-lightest: #93c5fd;
    --blueprint-gray: #1f2937;
    --blueprint-gray-light: #374151;
    --blueprint-gray-lighter: #4b5563;
    --blueprint-white: #f8fafc;
    --blueprint-cream: #fef3c7;
    --blueprint-line: rgba(59, 130, 246, 0.2);
    --blueprint-line-dark: rgba(30, 58, 138, 0.3);
    
    /* Accent Colors */
    --accent-complete: #10b981;
    --accent-warning: #f59e0b;
    --accent-danger: #ef4444;
    
    /* Spacing */
    --spacing-xs: 0.375rem;
    --spacing-sm: 0.75rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    
    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    
    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0, 0, 0, 0.1);
    --shadow-md: 0 4px 8px rgba(0, 0, 0, 0.15);
    --shadow-lg: 0 8px 16px rgba(0, 0, 0, 0.2);
}

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

body {
    font-family: 'Space Grotesk', sans-serif;
    background: var(--blueprint-white);
    color: var(--blueprint-gray);
    line-height: 1.6;
    min-height: 100vh;
    position: relative;
    overflow-x: hidden;
}

.app-container {
    position: relative;
    min-height: 100vh;
    z-index: 1;
}

/* Blueprint Grid Background */
.blueprint-grid {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(var(--blueprint-line) 1px, transparent 1px),
        linear-gradient(90deg, var(--blueprint-line) 1px, transparent 1px);
    background-size: 40px 40px;
    opacity: 0.3;
    z-index: 0;
    pointer-events: none;
}

.blueprint-grid::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: 
        linear-gradient(var(--blueprint-line-dark) 1px, transparent 1px),
        linear-gradient(90deg, var(--blueprint-line-dark) 1px, transparent 1px);
    background-size: 200px 200px;
    opacity: 0.2;
}

/* Header */
.app-header {
    background: var(--blueprint-white);
    border-bottom: 3px solid var(--blueprint-blue);
    box-shadow: var(--shadow-md);
    position: sticky;
    top: 0;
    z-index: 100;
    padding: var(--spacing-sm) var(--spacing-md);
}

.header-content {
    max-width: 1000px;
    margin: 0 auto;
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: var(--spacing-lg);
    flex-wrap: wrap;
}

.logo-section {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.logo-section i {
    font-size: 1.5rem;
    color: var(--blueprint-blue);
    transform: rotate(-15deg);
}

.title-wrapper {
    display: flex;
    flex-direction: column;
    gap: 0.125rem;
}

.logo-section h1 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--blueprint-blue);
    letter-spacing: -0.02em;
    text-transform: uppercase;
    margin: 0;
    line-height: 1.2;
}

.site-subtitle {
    font-size: 0.75rem;
    font-weight: 400;
    color: var(--blueprint-gray-lighter);
    text-transform: none;
    letter-spacing: 0.02em;
    margin: 0;
    line-height: 1.2;
}

.progress-section {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
    min-width: 200px;
}

.progress-info {
    display: flex;
    justify-content: space-between;
    align-items: baseline;
    gap: var(--spacing-sm);
}

.progress-text {
    font-size: 1.25rem;
    font-weight: 700;
    color: var(--blueprint-blue);
}

.progress-label {
    font-size: 0.75rem;
    color: var(--blueprint-gray-lighter);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.progress-bar-container {
    width: 100%;
}

.progress-bar {
    width: 100%;
    height: 8px;
    background: var(--blueprint-gray-lighter);
    border-radius: var(--radius-sm);
    overflow: hidden;
    position: relative;
    border: 1px solid var(--blueprint-line);
}

.progress-fill {
    height: 100%;
    background: linear-gradient(90deg, var(--blueprint-blue-light) 0%, var(--blueprint-blue) 100%);
    width: 0%;
    transition: width 0.3s ease;
    position: relative;
}

.progress-fill::after {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: repeating-linear-gradient(
        90deg,
        transparent,
        transparent 4px,
        rgba(255, 255, 255, 0.1) 4px,
        rgba(255, 255, 255, 0.1) 8px
    );
}

/* Main Content */
.main-content {
    max-width: 1000px;
    margin: 0 auto;
    padding: var(--spacing-md) var(--spacing-md);
    position: relative;
    z-index: 1;
}

/* Action Buttons */
.action-buttons {
    display: flex;
    gap: var(--spacing-xs);
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
}

.btn {
    display: inline-flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-xs) var(--spacing-sm);
    border: 2px solid;
    border-radius: var(--radius-md);
    font-family: 'Space Grotesk', sans-serif;
    font-size: 0.85rem;
    font-weight: 600;
    cursor: pointer;
    transition: all 0.3s ease;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    background: var(--blueprint-white);
    position: relative;
    overflow: hidden;
}

.btn::before {
    content: '';
    position: absolute;
    top: 0;
    left: -100%;
    width: 100%;
    height: 100%;
    background: linear-gradient(90deg, transparent, rgba(255, 255, 255, 0.3), transparent);
    transition: left 0.5s;
}

.btn:hover::before {
    left: 100%;
}

.btn-primary {
    color: var(--blueprint-white);
    background: var(--blueprint-blue);
    border-color: var(--blueprint-blue);
}

.btn-primary:hover {
    background: var(--blueprint-blue-light);
    border-color: var(--blueprint-blue-light);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn-secondary {
    color: var(--blueprint-blue);
    border-color: var(--blueprint-blue);
}

.btn-secondary:hover {
    background: var(--blueprint-blue);
    color: var(--blueprint-white);
    transform: translateY(-2px);
    box-shadow: var(--shadow-md);
}

.btn i {
    font-size: 0.9rem;
}

/* Checklist Container */
.checklist-container {
    background: var(--blueprint-white);
    border: 2px solid var(--blueprint-blue);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-lg);
    padding: var(--spacing-md);
    position: relative;
}

.checklist-container::before {
    content: '';
    position: absolute;
    top: -2px;
    left: -2px;
    right: -2px;
    bottom: -2px;
    background: linear-gradient(45deg, var(--blueprint-blue-lightest), transparent, var(--blueprint-blue-lightest));
    border-radius: var(--radius-lg);
    z-index: -1;
    opacity: 0.3;
}

.checklist {
    list-style: none;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.checklist-item {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    padding: var(--spacing-sm) var(--spacing-md);
    background: var(--blueprint-white);
    border: 2px solid var(--blueprint-line);
    border-radius: var(--radius-md);
    transition: all 0.3s ease;
    position: relative;
    cursor: pointer;
}

.checklist-item.sub-point {
    margin-left: var(--spacing-lg);
    border-left: 3px solid var(--blueprint-blue-light);
    background: rgba(59, 130, 246, 0.03);
    border-color: var(--blueprint-blue-lightest);
    padding: var(--spacing-xs) var(--spacing-sm) var(--spacing-xs) var(--spacing-md);
}

.checklist-item.sub-point::before {
    display: none;
}

.checklist-item.sub-point:hover {
    border-left-color: var(--blueprint-blue);
    background: rgba(59, 130, 246, 0.05);
}

.checklist-item.sub-point.completed {
    background: rgba(16, 185, 129, 0.05);
    border-left-color: var(--accent-complete);
}

.checklist-item::before {
    content: '';
    position: absolute;
    left: 0;
    top: 0;
    bottom: 0;
    width: 4px;
    background: var(--blueprint-blue);
    transform: scaleY(0);
    transition: transform 0.3s ease;
    border-radius: var(--radius-md) 0 0 var(--radius-md);
}

.checklist-item:hover {
    border-color: var(--blueprint-blue-light);
    box-shadow: var(--shadow-sm);
    transform: translateX(4px);
}

.checklist-item:hover::before {
    transform: scaleY(1);
}

.checklist-item.completed {
    background: rgba(16, 185, 129, 0.05);
    border-color: var(--accent-complete);
}

.checklist-item.completed::before {
    background: var(--accent-complete);
    transform: scaleY(1);
}

.checklist-item.completed .checklist-label {
    text-decoration: line-through;
    color: var(--blueprint-gray-lighter);
}

.checkbox-wrapper {
    position: relative;
    flex-shrink: 0;
}

.checkbox-wrapper input[type="checkbox"] {
    appearance: none;
    width: 20px;
    height: 20px;
    border: 2px solid var(--blueprint-blue);
    border-radius: var(--radius-sm);
    cursor: pointer;
    position: relative;
    transition: all 0.3s ease;
    background: var(--blueprint-white);
}

.checkbox-wrapper input[type="checkbox"]:hover {
    border-color: var(--blueprint-blue-light);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.checkbox-wrapper input[type="checkbox"]:checked {
    background: var(--blueprint-blue);
    border-color: var(--blueprint-blue);
}

.checkbox-wrapper input[type="checkbox"]:checked::after {
    content: '✓';
    position: absolute;
    top: 50%;
    left: 50%;
    transform: translate(-50%, -50%);
    color: var(--blueprint-white);
    font-size: 12px;
    font-weight: bold;
}

.checklist-label {
    flex: 1;
    font-size: 0.9rem;
    font-weight: 500;
    color: var(--blueprint-gray);
    cursor: pointer;
    user-select: none;
    line-height: 1.4;
}

.checklist-item-number {
    font-weight: 700;
    color: var(--blueprint-blue);
    min-width: 20px;
    font-size: 0.8rem;
}

.sub-point-spacer {
    min-width: 24px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.sub-point-spacer::before {
    content: '└';
    color: var(--blueprint-blue-light);
    font-size: 1rem;
}

.item-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    flex-shrink: 0;
}

.add-sub-btn {
    background: transparent;
    border: none;
    color: var(--blueprint-blue);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    flex-shrink: 0;
}

.add-sub-btn:hover {
    background: rgba(59, 130, 246, 0.1);
    color: var(--blueprint-blue-light);
    transform: scale(1.1);
}

.add-sub-btn i {
    font-size: 0.875rem;
}

.remove-btn {
    background: transparent;
    border: none;
    color: var(--blueprint-gray-lighter);
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: var(--radius-sm);
    transition: all 0.3s ease;
    display: flex;
    align-items: center;
    justify-content: center;
    width: 28px;
    height: 28px;
    flex-shrink: 0;
}

.remove-btn:hover {
    background: rgba(239, 68, 68, 0.1);
    color: var(--accent-danger);
    transform: scale(1.1);
}

.remove-btn i {
    font-size: 0.875rem;
}

/* Empty State */
.checklist-empty {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--blueprint-gray-lighter);
}

.checklist-empty i {
    font-size: 3rem;
    margin-bottom: var(--spacing-md);
    color: var(--blueprint-line);
}

.checklist-empty p {
    font-size: 1.1rem;
}

/* Modal */
.modal {
    display: none;
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: 1000;
    align-items: center;
    justify-content: center;
}

.modal[aria-hidden="false"] {
    display: flex;
}

.modal-backdrop {
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background: rgba(0, 0, 0, 0.5);
    backdrop-filter: blur(4px);
}

.modal-content {
    position: relative;
    background: var(--blueprint-white);
    border: 3px solid var(--blueprint-blue);
    border-radius: var(--radius-lg);
    padding: var(--spacing-xl);
    max-width: 500px;
    width: 90%;
    box-shadow: var(--shadow-lg);
    z-index: 1001;
    animation: modalSlideIn 0.3s ease;
}

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

.modal-header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    margin-bottom: var(--spacing-lg);
    padding-bottom: var(--spacing-md);
    border-bottom: 2px solid var(--blueprint-line);
}

.modal-header h2 {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--blueprint-blue);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.modal-close {
    background: transparent;
    border: none;
    color: var(--blueprint-gray-lighter);
    cursor: pointer;
    font-size: 1.5rem;
    padding: var(--spacing-xs);
    transition: all 0.3s ease;
    border-radius: var(--radius-sm);
    width: 36px;
    height: 36px;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-close:hover {
    background: rgba(239, 68, 68, 0.1);
    color: var(--accent-danger);
    transform: rotate(90deg);
}

.modal-form {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-lg);
}

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group label {
    font-weight: 600;
    color: var(--blueprint-gray);
    font-size: 0.95rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-group input {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 2px solid var(--blueprint-line);
    border-radius: var(--radius-md);
    font-family: 'Space Grotesk', sans-serif;
    font-size: 1rem;
    transition: all 0.3s ease;
    background: var(--blueprint-white);
}

.form-group input:focus {
    outline: none;
    border-color: var(--blueprint-blue);
    box-shadow: 0 0 0 4px rgba(59, 130, 246, 0.1);
}

.form-actions {
    display: flex;
    gap: var(--spacing-sm);
    justify-content: flex-end;
    margin-top: var(--spacing-md);
}

/* Responsive Design */
@media screen and (max-width: 768px) {
    .header-content {
        flex-direction: column;
        align-items: flex-start;
    }
    
    .progress-section {
        width: 100%;
    }
    
    .action-buttons {
        flex-direction: column;
    }
    
    .btn {
        width: 100%;
        justify-content: center;
    }
    
    .main-content {
        padding: var(--spacing-md);
    }
    
    .checklist-container {
        padding: var(--spacing-md);
    }
    
    .checklist-item {
        padding: var(--spacing-sm);
    }
    
    .modal-content {
        padding: var(--spacing-md);
        width: 95%;
    }
}

@media screen and (max-width: 480px) {
    .logo-section h1 {
        font-size: 1.5rem;
    }
    
    .progress-text {
        font-size: 1.25rem;
    }
    
    .checklist-label {
        font-size: 0.9rem;
    }
}

/* Footer */
#footer {
    text-align: center;
    padding: 2rem 1rem;
    margin-top: 3rem;
    border-top: 1px solid rgba(0, 0, 0, 0.1);
    background-color: #f8f9fa;
}

.footer-content {
    display: flex;
    flex-direction: column;
    gap: 1rem;
    align-items: center;
    max-width: 1000px;
    margin: 0 auto;
}

.footer-content p {
    margin: 0.25rem 0;
    color: #666;
    font-size: 0.9rem;
}

.footer-subtitle {
    font-size: 0.85rem;
    color: #888;
    font-style: italic;
}

.footer-links {
    display: flex;
    align-items: center;
    gap: 0.75rem;
    flex-wrap: wrap;
    justify-content: center;
}

.footer-links a {
    color: #666;
    text-decoration: none;
    transition: color 0.3s ease;
    font-size: 0.9rem;
}

.footer-links a:hover {
    color: #333;
    text-decoration: underline;
}

.footer-separator {
    color: #999;
    opacity: 0.5;
}

.footer-copyright {
    margin-top: 1rem;
    font-size: 0.85rem;
    color: #888;
}

@media (max-width: 768px) {
    .footer-links {
        flex-direction: column;
        gap: 0.5rem;
    }
    
    .footer-separator {
        display: none;
    }
}