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h4{color:var(--text-primary);margin-bottom:.75rem;font-size:1.1rem;font-weight:600}.info-card p{color:#fffc;font-size:.9rem;line-height:1.6;margin:0}@media (max-width: 1200px){.hero-grid{flex-direction:column;height:auto;padding:5rem 0}}@media (max-width: 800px){.hero-grid .hero-visual{display:none}.hero-grid .hero-actions{justify-content:center}.hero-section{align-items:flex-end}.hero-grid{padding-bottom:0}.hero-content{background:#0003;-webkit-backdrop-filter:blur(3px);backdrop-filter:blur(3px)}.hero-section .hero-bg-image{object-position:-180px center}}@media (max-width: 768px){.feedback-section{padding:2rem 0}.feedback-header h2{font-size:2rem}.feedback-subtitle{font-size:1rem}.feedback-form-container{padding:1.5rem;margin-bottom:2rem}.form-row{grid-template-columns:1fr;gap:1rem}.form-group input,.form-group select,.form-group textarea{padding:.75rem .875rem;font-size:.95rem}.rating-input{justify-content:center;margin-top:.5rem}.star{font-size:1.25rem}.submit-btn{padding:.875rem 2rem;font-size:.95rem;width:100%;max-width:300px}.feedback-success{padding:2rem 1.5rem}.feedback-success h2{font-size:1.75rem}.info-grid{grid-template-columns:1fr;gap:1rem}.info-card{padding:1rem}.feedback-info h3{font-size:1.5rem}}@media (max-width: 480px){.feedback-form-container{padding:1rem}.feedback-header h2{font-size:1.75rem}.feedback-subtitle{font-size:.95rem}.form-group input,.form-group select,.form-group textarea{padding:.625rem .75rem;font-size:.9rem}.star{font-size:1.125rem}.submit-btn{padding:.75rem 1.5rem;font-size:.9rem}}:root{--primary: #002E51;--secondary: #276268;--accent: #39C598;--highlight: #FF6B35;--highlight-dark: #E55A2B;--background: #002E51;--text-primary: #ffffff;--text-secondary: #B8C8D8;--text-light: #000000;--text-on-orange: #ffffff;--text-muted: #8A9BA8;--surface-primary: #1A3A5C;--surface-secondary: #2A4A6C;--surface-accent: #39C598;--surface-dark: #ffffff;--border-light: #3A5A7C;--border-medium: #276268;--border-dark: #1A3A5C;--font-family-heading: 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0;flex-shrink:1;object-fit:contain}.unit-tab-bar{display:flex;background:var(--surface-light);border:2px solid var(--border-light);border-radius:10px;overflow:hidden;padding:4px;gap:4px}.unit-tab{background:transparent;border:none;color:var(--text-muted);padding:var(--space-xs) var(--space-md);cursor:pointer;font-family:var(--font-family-heading);font-size:.875rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;transition:all var(--transition-normal);min-width:50px;position:relative}.unit-tab:hover{background:var(--text-secondary);color:var(--primary)}.unit-tab.active{background:var(--highlight);color:var(--text-on-orange)}.bottom-navigation{background:var(--surface-light);padding:0;position:fixed;bottom:0;left:0;right:0;z-index:100;box-shadow:0 -4px 12px #0000001a}.nav-container{margin:0 auto}.nav-tabs{display:flex;justify-content:center;gap:5px;background:var(--surface-primary);border-radius:var(--radius-md);padding:15px 10px 10px;box-shadow:inset 0 2px 4px 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#ff6b354d;transform:translateY(-2px)}.nav-tab.active .nav-tab-icon{transform:scale(1.05)}.nav-tab.active:before{opacity:0}.nav-tab-icon{display:block;width:20px;height:20px;transition:all var(--transition-normal)}.nav-tab-icon svg{width:100%;height:100%;stroke:currentColor;transition:all var(--transition-normal)}.nav-tab-label{font-size:.75rem;line-height:1;text-align:center;display:block;font-weight:500}.nav-tabs:before{content:"";position:absolute;top:0;left:0;right:0;height:2px;background:linear-gradient(90deg,var(--highlight),var(--accent),var(--highlight));border-radius:var(--radius-lg) var(--radius-lg) 0 0}.nav-tab:first-child{border-top-left-radius:var(--radius-md);border-bottom-left-radius:var(--radius-md)}.nav-tab:last-child{border-top-right-radius:var(--radius-md);border-bottom-right-radius:var(--radius-md)}.app-main{max-width:1200px;margin:0 auto;padding:var(--space-lg);padding-top:120px;padding-bottom:120px;min-height:calc(100vh - 240px);display:flex;flex-direction:column;justify-content:center;align-items:center}.calculator-screen{background:var(--surface-primary);border:3px solid var(--border-medium);border-radius:var(--radius-md);padding:var(--space-xl);box-shadow:var(--shadow-sm);width:100%;max-width:800px;animation:fadeInUp .6s ease-out}.duration-calculator,.speed-to-pace-converter{max-width:525px}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}.screen-header{text-align:center;margin-bottom:var(--space-xl);border-bottom:2px solid var(--accent);padding-bottom:var(--space-md)}.screen-header h2{font-family:var(--font-family-heading);font-size:2rem;margin:0 0 var(--space-xs) 0;font-weight:700;color:var(--text-primary);letter-spacing:-.02em}.screen-header p,.results-section p{font-size:1rem;margin:0 0 var(--space-sm) 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label{font-family:var(--font-family-heading);font-weight:600;font-size:1rem;color:var(--text-primary);text-transform:uppercase;letter-spacing:.05em}.input-with-unit{display:flex;gap:var(--space-xs);align-items:center}.input-with-incrementers{display:flex;align-items:center;background:var(--surface-primary);border:2px solid var(--border-light);border-radius:var(--radius-sm);transition:all var(--transition-normal)}.input-with-incrementers:focus-within{border-color:var(--accent);box-shadow:0 0 0 2px #39c59833}.number-input{background:transparent;border:none;color:var(--text-primary);padding:var(--space-xs);font-size:1rem;flex:1;transition:all 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var(--transition-normal);font-weight:500}.unit-select:focus{outline:none;border-color:var(--accent);box-shadow:0 0 0 2px #39c59833}.unit-select option{background:var(--surface-primary);color:var(--text-primary)}.unit-display{font-size:.85rem;min-width:80px;text-align:center;font-weight:600}.pace-input{display:flex;align-items:center;gap:var(--space-xs)}.pace-input .number-input{font-weight:600}.pace-separator{font-size:1.25rem;font-weight:700;color:var(--text-primary)}.pace-unit{font-size:.875rem;font-weight:500;color:var(--text-secondary)}.distance-checkboxes{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:var(--space-xs)}.checkbox-label{display:flex;align-items:center;gap:var(--space-xs);cursor:pointer;padding:var(--space-xs);border-radius:var(--radius-sm);transition:background-color var(--transition-fast);border:2px solid var(--border-light);font-family:var(--font-family-heading);font-weight:600;text-transform:uppercase;letter-spacing:.05em}.checkbox-label:hover{background:var(--surface-secondary);border-color:var(--accent)}.checkbox-label input[type=checkbox]{width:18px;height:18px;accent-color:var(--accent)}.paces-input{display:flex;flex-direction:column;gap:var(--space-sm)}.pace-input-row{display:flex;align-items:center;gap:var(--space-sm)}.remove-button,.add-button{background:var(--surface-primary);border:2px solid var(--border-light);color:var(--text-primary);padding:var(--space-xs) var(--space-sm);border-radius:var(--radius-sm);cursor:pointer;font-family:var(--font-family-heading);font-size:.875rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;transition:all var(--transition-normal)}.remove-button:hover,.add-button:hover{background:var(--surface-secondary);border-color:var(--highlight)}.add-button{background:var(--highlight);border-color:var(--highlight);color:var(--text-on-orange)}.add-button:hover{background:var(--highlight-dark);border-color:var(--highlight-dark);color:var(--text-on-orange)}.result-card{background:var(--surface-secondary);border:3px solid var(--highlight);border-radius:var(--radius-md);padding:var(--space-lg);text-align:center;box-shadow:var(--shadow-sm)}.result-card h3{font-family:var(--font-family-heading);margin:0 0 var(--space-sm) 0;font-size:1.25rem;font-weight:700;color:var(--text-primary)}.result-value{font-size:2.5rem;font-weight:800;margin-bottom:var(--space-sm);color:var(--accent);font-family:var(--font-family-mono);letter-spacing:-.02em}.result-details{font-size:.875rem;color:var(--text-secondary)}.result-details p{margin:var(--space-xs) 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h3{font-family:var(--font-family-heading);font-size:1.5rem;font-weight:700;margin-bottom:var(--space-xs);color:var(--text-primary);text-align:center}.comparison-table{background:var(--surface-primary);border-radius:var(--radius-md);overflow-x:auto;overflow-y:hidden;border:3px solid var(--border-medium);box-shadow:var(--shadow-sm);min-width:600px}.table-header{display:flex;background:var(--secondary);font-weight:700;white-space:nowrap}.header-cell{padding:var(--space-sm);text-align:center;border-right:2px solid var(--border-dark);letter-spacing:.01em;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex:0 0 140px;min-width:0;background:var(--secondary);flex-grow:1;font-family:var(--font-family-heading);font-size:.875rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em}.header-cell:first-child{flex:0 0 180px;flex-grow:1;position:sticky;left:0;z-index:2}.header-cell:last-child{border-right:none}.table-row{display:flex;transition:background-color var(--transition-fast);white-space:nowrap}.table-row:hover,.table-row:hover .row-label,.table-row:hover .result-cell{background:var(--surface-secondary)}.table-row:last-child{border-bottom:none}.row-label{padding:var(--space-sm);font-weight:700;background:var(--surface-secondary);border-right:2px solid var(--border-light);color:var(--text-primary);white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex:0 0 180px;min-width:0;border-bottom:2px solid var(--border-light);flex-grow:1;font-family:var(--font-family-heading);font-size:.875rem;font-weight:600;position:sticky;left:0;z-index:1;text-transform:uppercase;letter-spacing:.05em}.result-cell{padding:var(--space-sm);text-align:center;border-right:2px solid var(--border-light);font-family:var(--font-family-mono);font-weight:600;color:var(--text-primary);font-size:.875rem;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;flex:0 0 140px;min-width:0;border-bottom:2px solid var(--border-light);flex-grow:1;cursor:pointer;transition:all var(--transition-normal);position:relative}.result-cell:hover{background:var(--accent);color:var(--text-on-orange);transform:scale(1.02)}.result-cell:active{transform:scale(.98)}.result-cell:last-child{border-right:none}@media (max-width: 768px){.nav-tab,.unit-tab,.toggle-button,.add-button,.remove-button{padding:var(--space-sm) var(--space-md)}.logo-container{padding:8px 0}.calculator-form{gap:var(--space-lg)}.input-group{gap:var(--space-sm)}.nav-tab{flex:1;min-width:0;min-height:50px;padding:var(--space-xs) var(--space-sm)}.nav-tab-icon{width:18px;height:18px}.nav-tab-label{font-size:.7rem}.header-container{flex-direction:row;gap:var(--space-sm);align-items:center;justify-content:space-between}.unit-tab-bar{flex-shrink:0}}@media (max-width: 768px){.header-container{padding:0 var(--space-sm);flex-direction:row;justify-content:space-between;align-items:center}.header-nav{gap:var(--space-sm)}.nav-link{font-size:.9rem}.app-logo{height:32px}.unit-tab{padding:var(--space-xs) var(--space-sm);min-width:45px;font-size:.8rem}.nav-tab{width:100%;max-width:300px}.app-main{padding:var(--space-sm);padding-top:100px;padding-bottom:140px;justify-content:flex-start}.calculator-screen{padding:var(--space-md)}.screen-header h2{font-size:1.5rem}.input-with-unit{flex-direction:column;gap:var(--space-xs)}.pace-input-row{align-items:center;gap:var(--space-xs)}.pace-input{justify-content:center}.distance-checkboxes{grid-template-columns:1fr}.form-row{grid-template-columns:1fr;gap:var(--space-sm)}.remove-custom-distance-button{align-self:flex-end}.comparison-table{min-width:100%;overflow-x:auto}.table-header,.table-row{min-width:420px}.header-cell:first-child,.row-label{flex:0 0 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var(--border-medium);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);max-width:600px;width:100%;max-height:80vh;overflow:hidden;animation:modalSlideIn .3s ease-out}.modal-header{display:flex;justify-content:space-between;align-items:center;padding:var(--space-lg);border-bottom:2px solid var(--border-light);background:var(--surface-secondary)}.modal-header h2{font-family:var(--font-family-heading);font-size:1.5rem;font-weight:700;color:var(--text-primary);margin:0;text-transform:uppercase;letter-spacing:.05em}.modal-close{background:var(--surface-primary);border:2px solid var(--border-light);color:var(--text-primary);width:32px;height:32px;border-radius:4px;cursor:pointer;font-size:20px;font-weight:700;display:flex;align-items:center;justify-content:center;transition:all var(--transition-normal);font-family:monospace}.modal-close:hover{background:var(--accent);border-color:var(--accent);color:var(--text-on-orange)}.modal-body{padding:var(--space-sm);overflow-y:auto;max-height:calc(80vh - 80px);padding-bottom:120px}.splits-summary{display:grid;grid-template-columns:repeat(auto-fit,minmax(150px,1fr));gap:var(--space-md);margin-bottom:var(--space-lg);padding:var(--space-md);background:var(--surface-secondary);border-radius:var(--radius-sm);border:2px solid var(--border-light)}.summary-item{display:flex;flex-direction:column;align-items:center;text-align:center}.summary-label{font-family:var(--font-family-heading);font-size:.875rem;font-weight:600;color:var(--text-secondary);text-transform:uppercase;letter-spacing:.05em;margin-bottom:var(--space-xs)}.summary-value{font-family:var(--font-family-mono);font-size:1.125rem;font-weight:700;color:var(--text-primary)}.splits-table-container{overflow-x:auto;border:2px solid var(--border-light);border-radius:var(--radius-sm)}.splits-table{width:100%;border-collapse:collapse;background:var(--surface-primary)}.splits-table th{background:var(--secondary);color:var(--text-primary);padding:var(--space-xs);font-family:var(--font-family-heading);font-size:.75rem;font-weight:700;text-transform:uppercase;letter-spacing:.05em;text-align:center;border-bottom:2px solid var(--border-dark)}.splits-table td{padding:var(--space-xs);text-align:center;border-bottom:1px solid var(--border-light);font-size:.875rem}.splits-table tr:hover{background:var(--surface-secondary)}.splits-table tr:last-child td{border-bottom:none}.split-number{font-weight:700;color:var(--accent)}.split-distance{font-weight:600;color:var(--text-primary)}.cumulative-distance{font-weight:600;color:var(--text-secondary)}.split-time{font-family:var(--font-family-mono);font-weight:600;color:var(--text-primary)}.cumulative-time{font-family:var(--font-family-mono);font-weight:700;color:var(--text-primary)}@keyframes modalSlideIn{0%{opacity:0;transform:scale(.9) translateY(-20px)}to{opacity:1;transform:scale(1) translateY(0)}}.update-prompt-backdrop{position:fixed;inset:0;background:#000c;display:flex;align-items:center;justify-content:center;z-index:2000;padding:var(--space-lg)}.update-prompt{background:var(--surface-primary);border:3px solid var(--accent);border-radius:var(--radius-md);box-shadow:var(--shadow-lg);max-width:400px;width:100%;animation:updatePromptSlideIn .3s ease-out}.update-prompt-header{padding:var(--space-lg);border-bottom:2px solid var(--border-light);background:var(--surface-secondary);text-align:center}.update-prompt-header h3{font-family:var(--font-family-heading);font-size:1.25rem;font-weight:700;color:var(--text-primary);margin:0;text-transform:uppercase;letter-spacing:.05em}.update-prompt-body{padding:var(--space-lg);text-align:center}.update-prompt-body p{font-family:var(--font-family-body);color:var(--text-primary);margin:0 0 var(--space-sm) 0;line-height:1.5}.update-prompt-body p:last-child{margin-bottom:0}.update-prompt-actions{display:flex;gap:var(--space-sm);padding:var(--space-lg);padding-top:0}.update-button{flex:1;padding:var(--space-sm) var(--space-md);border:2px solid var(--border-light);border-radius:var(--radius-sm);font-family:var(--font-family-heading);font-size:.875rem;font-weight:600;text-transform:uppercase;letter-spacing:.05em;cursor:pointer;transition:all var(--transition-normal);outline:none}.update-button:disabled{opacity:.6;cursor:not-allowed}.update-button.secondary{background:var(--surface-primary);color:var(--text-primary);border-color:var(--border-light)}.update-button.secondary:hover:not(:disabled){background:var(--surface-secondary);border-color:var(--border-medium)}.update-button.primary{background:var(--accent);color:var(--text-on-orange);border-color:var(--accent)}.update-button.primary:hover:not(:disabled){background:var(--accent-dark);border-color:var(--accent-dark)}@keyframes updatePromptSlideIn{0%{opacity:0;transform:scale(.8) translateY(-30px)}to{opacity:1;transform:scale(1) translateY(0)}}