:root{--primary: #4361ee;--primary-dark: #3a56d4;--secondary: #4cc9f0;--accent: #f72585;--success: #06d6a0;--warning: #ffd166;--danger: #ef476f;--light: #f8f9fa;--dark: #212529;--gray-100: #f8f9fa;--gray-200: #e9ecef;--gray-300: #dee2e6;--gray-400: #ced4da;--gray-500: #adb5bd;--gray-600: #6c757d;--gray-700: #495057;--gray-800: #343a40;--gray-900: #212529;--body-bg: #f0f2f5;--card-bg: #ffffff;--header-bg: #ffffff;--footer-bg: var(--gray-100);--text-color: #212529;--text-muted: #6c757d;--border-color: #dee2e6;--border-radius: 8px;--border-radius-sm: 4px;--border-radius-lg: 12px;--box-shadow: 0 2px 8px rgba(0, 0, 0, .08);--box-shadow-sm: 0 1px 3px rgba(0, 0, 0, .05);--box-shadow-lg: 0 4px 16px rgba(0, 0, 0, .12);--transition: all .2s ease-in-out;--input-bg-color: #ffffff;--input-border-color: #ced4da;--input-disabled-bg-color: #e9ecef;--input-disabled-text-color: #6c757d;--spacing-xs: 4px;--spacing-sm: 8px;--spacing-md: 16px;--spacing-lg: 24px;--spacing-xl: 32px;--spacing-xxl: 48px;--content-max-width: 1200px;--content-narrow-width: 800px}*,*:before,*:after{margin:0;padding:0;box-sizing:border-box}body{font-family:Inter,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica,Arial,sans-serif;display:flex;flex-direction:column;min-height:100vh;padding-top:80px;padding-bottom:60px;background-color:var(--body-bg);color:var(--text-color);line-height:1.6;overflow-x:hidden;font-size:16px}h1,h2,h3,h4,h5,h6{font-weight:600;line-height:1.3;margin-bottom:var(--spacing-md);color:var(--gray-800)}h1{font-size:2rem}h2{font-size:1.5rem}h3{font-size:1.25rem}h4{font-size:1.125rem}h5{font-size:1rem}h6{font-size:.875rem}p{margin-bottom:var(--spacing-md)}a{color:var(--primary);text-decoration:none;transition:var(--transition)}a:hover{color:var(--primary-dark);text-decoration:underline}img{max-width:100%;height:auto}.text-center{text-align:center}.text-right{text-align:right}.text-left{text-align:left}.text-muted{color:var(--text-muted)}.fw-bold{font-weight:700}.fw-medium{font-weight:500}.fw-normal{font-weight:400}.d-flex{display:flex}.d-none{display:none}.flex-column{flex-direction:column}.flex-wrap{flex-wrap:wrap}.align-items-center{align-items:center}.justify-content-center{justify-content:center}.justify-content-between{justify-content:space-between}.gap-sm{gap:var(--spacing-sm)}.gap-md{gap:var(--spacing-md)}.gap-lg{gap:var(--spacing-lg)}.w-100{width:100%}.mb-0{margin-bottom:0}.mb-1{margin-bottom:var(--spacing-xs)}.mb-2{margin-bottom:var(--spacing-sm)}.mb-3{margin-bottom:var(--spacing-md)}.mb-4{margin-bottom:var(--spacing-lg)}.mt-0{margin-top:0}.mt-1{margin-top:var(--spacing-xs)}.mt-2{margin-top:var(--spacing-sm)}.mt-3{margin-top:var(--spacing-md)}.mt-4{margin-top:var(--spacing-lg)}.mx-auto{margin-left:auto;margin-right:auto}.p-0{padding:0}.p-1{padding:var(--spacing-xs)}.p-2{padding:var(--spacing-sm)}.p-3{padding:var(--spacing-md)}.p-4{padding:var(--spacing-lg)}.visually-hidden{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}body.dark-theme{--body-bg: #121212;--text-color: #e0e0e0;--card-bg: #1e1e1e;--header-bg: #1a1a2e;--footer-bg: #1a1a1a;--border-color: #333;--input-bg-color: #2c2c2c;--input-border-color: #444;--input-disabled-bg-color: #333;--input-disabled-text-color: #888;--gray-100: #252525;--gray-200: #333;--gray-300: #444;--gray-400: #555;--gray-500: #777;--gray-600: #999;--gray-700: #ccc;--gray-800: #e0e0e0;--gray-900: #f0f0f0;--primary: #6b8cff;--primary-dark: #5a7ae6;--box-shadow: 0 2px 8px rgba(0, 0, 0, .3);--box-shadow-sm: 0 1px 3px rgba(0, 0, 0, .2);--box-shadow-lg: 0 4px 16px rgba(0, 0, 0, .4)}body.dark-theme header{border-bottom-color:var(--border-color)}body.dark-theme footer{border-top-color:var(--border-color)}body.dark-theme .card,body.dark-theme .modal-content{background-color:var(--card-bg);border-color:var(--border-color);color:var(--text-color)}body.dark-theme input[type=text],body.dark-theme input[type=email],body.dark-theme select,body.dark-theme textarea{background-color:var(--input-bg-color);color:var(--text-color);border-color:var(--input-border-color)}body.dark-theme h1,body.dark-theme h2,body.dark-theme h3,body.dark-theme h4,body.dark-theme h5,body.dark-theme h6,body.dark-theme label{color:var(--text-color)}body.dark-theme .btn-primary,body.dark-theme .btn-success,body.dark-theme .btn-danger,body.dark-theme .btn-secondary{color:#fff}body.dark-theme .link-button{color:var(--primary)}body.dark-theme #return-button{background-color:var(--gray-200);color:var(--text-color)}body.dark-theme #return-button:hover{background-color:var(--gray-300)}