._authContainer_1lv9n_1{min-height:100vh;display:flex;justify-content:center;align-items:center;background:var(--color-bg);padding:20px}._authForm_1lv9n_10{background:var(--color-surface);border-radius:0;padding:60px 50px;width:100%;max-width:450px;box-shadow:none;border:2px solid var(--color-text)}._iconContainer_1lv9n_20,._userIcon_1lv9n_24{display:none}._title_1lv9n_28{text-align:left;color:var(--color-text);font-size:32px;font-weight:800;margin-bottom:10px;letter-spacing:2px;text-transform:uppercase;padding-bottom:15px;border-bottom:2px solid var(--color-text)}._inputGroup_1lv9n_40{position:relative;margin-bottom:30px}._inputIcon_1lv9n_45{position:absolute;left:0;top:50%;transform:translateY(-50%);color:var(--color-text-secondary);font-size:20px;z-index:1;opacity:.6}._input_1lv9n_40{width:100%;padding:15px 0;border:none;border-bottom:2px solid var(--color-border);border-radius:0;background:transparent;font-size:16px;color:var(--color-text);box-sizing:border-box;transition:border-color .3s;font-weight:400}._input_1lv9n_40:focus{outline:none;border-bottom-color:var(--color-text)}._input_1lv9n_40::placeholder{color:var(--color-text-secondary);opacity:.6;font-weight:400}._checkboxGroup_1lv9n_81{display:flex;align-items:center;margin-bottom:30px}._checkbox_1lv9n_81{width:18px;height:18px;margin-right:10px;cursor:pointer;accent-color:var(--color-text)}._checkboxLabel_1lv9n_95{color:var(--color-text-secondary);font-size:14px;cursor:pointer;font-weight:400}._button_1lv9n_102{width:100%;padding:18px;background:var(--color-text);color:var(--color-bg);border:3px solid var(--color-text);border-radius:0;font-size:16px;font-weight:700;letter-spacing:2px;text-transform:uppercase;cursor:pointer;transition:all .3s;margin-bottom:20px}._button_1lv9n_102:hover:not(:disabled){background:var(--color-bg);color:var(--color-text);transform:translateY(-2px);box-shadow:0 4px 12px #0003}._button_1lv9n_102:active:not(:disabled){transform:translateY(0)}._button_1lv9n_102:disabled{opacity:.5;cursor:not-allowed}._link_1lv9n_134{display:block;text-align:center;color:var(--color-text-secondary);font-size:14px;text-decoration:none;margin-top:15px;transition:color .3s;font-weight:500}._link_1lv9n_134:hover{color:var(--color-text);text-decoration:underline}._error_1lv9n_150{background:var(--color-surface);color:var(--color-error);padding:15px;border-radius:0;margin-bottom:20px;font-size:14px;text-align:center;border:2px solid var(--color-error);font-weight:500}._divider_1lv9n_162{height:2px;background:var(--color-border);margin:30px 0}._switchText_1lv9n_168{text-align:center;color:var(--color-text-secondary);font-size:14px;margin-top:25px;font-weight:400}._switchText_1lv9n_168 ._link_1lv9n_134{display:inline;margin-left:5px;font-weight:600}[data-theme=dark] ._authForm_1lv9n_10{background:var(--color-surface);border:2px solid var(--color-text)}[data-theme=dark] ._input_1lv9n_40{border-bottom-color:var(--color-border)}[data-theme=dark] ._input_1lv9n_40:focus{border-bottom-color:var(--color-text)}[data-theme=dark] ._button_1lv9n_102{background:var(--color-text);color:var(--color-bg)}[data-theme=dark] ._button_1lv9n_102:hover:not(:disabled){background:var(--color-bg);color:var(--color-text)}@media (max-width: 480px){._authForm_1lv9n_10{padding:40px 30px;border-width:1px}._title_1lv9n_28{font-size:28px;padding-bottom:12px}._input_1lv9n_40{padding:12px 12px 12px 35px;font-size:15px}._button_1lv9n_102{padding:15px;font-size:15px}}:root{--color-bg: #ffffff;--color-bg-gradient: #ffffff;--color-surface: #ffffff;--color-primary: #000000;--color-primary-dark: #000000;--color-primary-light: #333333;--color-primary-hover: #666666;--color-text: #000000;--color-text-secondary: #333333;--color-text-on-dark: #ffffff;--color-text-on-light: #000000;--color-border: #e0e0e0;--color-success: #10b981;--color-error: #ef4444;--color-warning: #f59e0b;--card-bg: rgba(255, 255, 255, .95);--card-border: rgba(0, 0, 0, .2);--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .05);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .1);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .1);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .1);--transition: all .3s ease}[data-theme=dark]{--color-bg: #000000;--color-bg-gradient: linear-gradient(135deg, #000000 0%, #1a1a1a 50%, #333333 100%);--color-surface: #1a1a1a;--color-primary: #ffffff;--color-primary-dark: #000000;--color-primary-light: #cccccc;--color-primary-hover: #ffffff;--color-text: #ffffff;--color-text-secondary: #cccccc;--color-text-on-dark: #ffffff;--color-text-on-light: #000000;--color-border: #333333;--card-bg: rgba(26, 26, 26, .95);--card-border: rgba(255, 255, 255, .3);--shadow-sm: 0 1px 2px 0 rgba(0, 0, 0, .3);--shadow-md: 0 4px 6px -1px rgba(0, 0, 0, .3);--shadow-lg: 0 10px 15px -3px rgba(0, 0, 0, .3);--shadow-xl: 0 20px 25px -5px rgba(0, 0, 0, .3)}*{box-sizing:border-box;margin:0;padding:0}html,body{max-width:100vw;overflow-x:hidden;font-family:-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Oxygen,Ubuntu,Cantarell,Fira Sans,Droid Sans,Helvetica Neue,sans-serif;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}body{background:var(--color-bg-gradient);background-attachment:fixed;color:var(--color-text);transition:var(--transition);margin:0;padding:0;min-height:100vh}.container{min-height:100vh;padding:0;margin:0 auto;position:relative;background:transparent}.container:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:#0000001a;pointer-events:none;z-index:0}.container>*{position:relative;z-index:1}.header{text-align:center;margin-bottom:2rem;margin-top:1rem;animation:fadeInDown .6s ease;color:var(--color-text-on-dark)}.subtitle{font-size:1.25rem;color:var(--color-primary-hover);font-weight:300}.title{font-size:2.5rem;font-weight:800;color:var(--color-text-on-dark);margin-bottom:.5rem;display:flex;align-items:center;justify-content:center;gap:.5rem}.icon{font-size:3rem;display:inline-block;animation:bounce 2s infinite}.subtitle{font-size:1.125rem;color:var(--color-primary-hover);font-weight:300}.main{max-width:700px;margin:0 auto;display:flex;flex-direction:column;gap:1.5rem;padding:0 2rem}.theme-toggle{background:var(--color-text);color:var(--color-bg);border:2px solid var(--color-text);border-radius:.5rem;padding:.5rem 1rem;min-width:60px;height:36px;cursor:pointer;transition:var(--transition);box-shadow:0 2px 8px #0003;display:flex;align-items:center;justify-content:center;flex-shrink:0;font-weight:700;letter-spacing:.5px}.theme-toggle:hover{transform:translateY(-2px);box-shadow:0 4px 12px #0000004d;background:var(--color-bg);color:var(--color-text)}.study-form{background:var(--card-bg);padding:2.5rem;border-radius:.5rem;box-shadow:0 4px 20px #0000001a,0 0 0 2px var(--color-text);margin-bottom:1.5rem;animation:fadeInUp .6s ease;border:2px solid var(--color-text);transition:var(--transition);max-width:100%}.study-form:hover{box-shadow:0 8px 30px #00000026,0 0 0 2px var(--color-text);transform:translateY(-4px)}.form-group{margin-bottom:2rem}.form-label{display:block;font-weight:600;margin-bottom:.5rem;color:#000;font-size:1.125rem}.form-input{width:100%;padding:1.125rem 1.25rem;font-size:1.05rem;border:2px solid var(--color-text);border-radius:.5rem;background:var(--color-bg)!important;transition:var(--transition);font-weight:500;box-shadow:none;color:var(--color-text)}.form-input:hover{border-color:var(--color-text);box-shadow:0 0 0 2px var(--color-text)}.form-input:focus{outline:none;border-color:var(--color-text);box-shadow:0 0 0 3px #0000001a;color:var(--color-text)!important;transform:translateY(-1px);background:var(--color-bg)!important}.form-input:disabled{opacity:.6;cursor:not-allowed}.form-input::placeholder{color:var(--color-text-secondary)!important;opacity:.6}.form-input::-webkit-input-placeholder{color:var(--color-text-secondary)!important;opacity:.6}.form-input::-moz-placeholder{color:var(--color-text-secondary)!important;opacity:.6}.form-input:-ms-input-placeholder{color:var(--color-text-secondary)!important;opacity:.6}.mode-toggle{display:flex;align-items:center;gap:.875rem;cursor:pointer;-webkit-user-select:none;user-select:none;padding:.75rem 1rem;background:#000!important;border-radius:1rem;border:2px solid #000000;transition:var(--transition)}.mode-toggle:hover{border-color:#333;background:#333!important;transform:translateY(-1px);box-shadow:0 4px 12px #00000026}.mode-toggle input[type=checkbox]{width:1.25rem;height:1.25rem;cursor:pointer;accent-color:var(--color-primary)}.mode-label{display:flex;align-items:center;gap:.5rem;font-weight:500;color:#fff!important}.mode-icon{font-size:1.25rem}.submit-button{width:100%;padding:1.25rem 2rem;font-size:1.125rem;font-weight:700;color:var(--color-bg);background:var(--color-text);border:3px solid var(--color-text);border-radius:.75rem;cursor:pointer;transition:var(--transition);box-shadow:0 4px 12px #0003;letter-spacing:1px;text-transform:uppercase;font-size:1rem}.submit-button:hover:not(:disabled){transform:translateY(-3px);box-shadow:0 8px 20px #0000004d;background:var(--color-bg);color:var(--color-text);border-color:var(--color-text)}.submit-button:active:not(:disabled){transform:translateY(0)}.submit-button:disabled{opacity:.6;cursor:not-allowed}.loading{text-align:center;padding:3rem;animation:fadeIn .3s ease;color:var(--color-text-on-dark)}.spinner{width:50px;height:50px;margin:0 auto 1rem;border:4px solid rgba(0,0,0,.3);border-top-color:var(--color-primary-hover);border-radius:50%;animation:spin 1s linear infinite}.error{background:var(--card-bg);border:2px solid var(--color-error);border-radius:1.5rem;padding:2rem;margin-bottom:2rem;display:flex;gap:1.25rem;align-items:flex-start;animation:shake .5s ease;box-shadow:0 20px 60px #ef444426,0 0 0 1px #ef44441a;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px)}.error-icon{font-size:2rem;flex-shrink:0}.error h3{color:var(--color-error);margin-bottom:.5rem;font-size:1.125rem}.error p{color:var(--color-text-secondary);line-height:1.6;margin:0}.error code{font-family:Monaco,Courier New,monospace;font-size:.85rem}.results{animation:fadeInUp .6s ease}.results-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1.5rem;flex-wrap:wrap;gap:1rem;padding:1.5rem 1.75rem;background:var(--card-bg);border-radius:1.5rem;box-shadow:0 20px 60px #00000026,0 0 0 1px #0000001a;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);border:1px solid var(--card-border);transition:var(--transition);max-width:100%}.results-header:hover{box-shadow:0 25px 70px #0003,0 0 0 1px #00000026;transform:translateY(-2px)}.results-header h2{font-size:1.5rem;color:var(--color-text)!important;margin:0;font-weight:700}.source-link{color:#000;text-decoration:none;font-weight:600;transition:var(--transition);padding:.5rem 1rem;border-radius:.75rem;border:2px solid #000000;background:#533f670d}.source-link:hover{color:var(--color-text);background:#0000001a;border-color:var(--color-text);text-decoration:none;transform:translateY(-1px)}.section{background:var(--card-bg);padding:2rem;border-radius:.5rem;margin-bottom:1.5rem;box-shadow:0 4px 20px #0000001a,0 0 0 2px var(--color-text);transition:var(--transition);border:2px solid var(--color-text);max-width:100%;width:100%}.section:hover{box-shadow:0 8px 30px #00000026,0 0 0 2px var(--color-text);transform:translateY(-4px)}.section h3{font-size:1.5rem;margin-bottom:1.5rem;color:var(--color-text)!important;font-weight:800;display:flex;align-items:center;gap:.5rem;padding-bottom:1rem;border-bottom:3px solid var(--color-text);text-transform:uppercase;letter-spacing:.5px}.summary-list{list-style:none;padding:0}.summary-item{padding:.875rem 0 .875rem 2rem;position:relative;line-height:1.7;color:var(--color-text)!important;font-size:.95rem;transition:var(--transition);font-weight:600}.summary-item:hover{color:var(--color-text-secondary);padding-left:2.25rem}.summary-item:before{content:"▸";position:absolute;left:.5rem;color:var(--color-primary);font-weight:700;font-size:1.25rem;transition:var(--transition)}.summary-item:hover:before{color:var(--color-primary-hover);transform:translate(4px)}.quiz-question{padding:1.5rem;background:var(--card-bg)!important;border-radius:1.25rem;margin-bottom:1.5rem;border:1px solid var(--color-border);transition:var(--transition);box-shadow:0 4px 16px #00000014;max-width:100%}.quiz-question:hover{border-color:var(--color-primary-hover);box-shadow:0 8px 24px #0003;transform:translateY(-2px)}.quiz-question:last-child{margin-bottom:0}.question-number{font-size:.875rem;font-weight:600;color:var(--color-primary);text-transform:uppercase;margin-bottom:.5rem}.question-text{font-size:1rem;font-weight:600;margin-bottom:1rem;color:var(--color-text)!important}.options{display:flex;flex-direction:column;gap:.75rem;margin-bottom:1rem}.option{padding:1rem 1.125rem;text-align:left;background:var(--card-bg)!important;border:2px solid var(--color-border);border-radius:.875rem;cursor:pointer;transition:var(--transition);font-size:.95rem;color:var(--color-text)!important;font-weight:600;box-shadow:0 2px 8px #0000000d}.option:hover:not(:disabled){border-color:var(--color-primary-hover);transform:translate(4px);background:#0000000d}.option.selected{border-color:var(--color-text);background:var(--color-surface)!important;font-weight:600;color:var(--color-text)!important}.option.correct{border-color:var(--color-success);background:#10b9811a;color:var(--color-text)!important}.option.incorrect{border-color:var(--color-error);background:#ef44441a;color:var(--color-text)!important}.option:disabled{cursor:not-allowed}.check-button{padding:.875rem 1.75rem;background:var(--color-text);color:var(--color-bg);border:3px solid var(--color-text);border-radius:0;font-weight:700;letter-spacing:1px;text-transform:uppercase;cursor:pointer;transition:var(--transition);box-shadow:0 4px 16px #0000004d}.check-button:hover{background:var(--color-bg);color:var(--color-text);transform:translateY(-3px);box-shadow:0 8px 24px #0006}.explanation{margin-top:1rem;padding:1.5rem;border-radius:1rem;border-left:4px solid;animation:fadeIn .3s ease;box-shadow:0 4px 16px #00000014}.explanation.correct{background:#10b98126!important;border-color:var(--color-success)}.explanation.incorrect{background:#ef444426!important;border-color:var(--color-error)}.explanation strong{display:block;margin-bottom:.5rem;color:var(--color-text)!important;font-weight:700}.explanation p{color:var(--color-text)!important;line-height:1.6;font-weight:600;font-size:.95rem}.math-question{padding:1.5rem;background:var(--card-bg)!important;border-radius:1.25rem;box-shadow:0 4px 16px #00000014;border:1px solid var(--color-border);max-width:100%}.math-question .question-text{font-size:1rem;margin-bottom:1.25rem;line-height:1.6;color:var(--color-text)!important;font-weight:600}.math-answer{padding:1.25rem;background:var(--color-surface)!important;border-left:4px solid var(--color-text);border-radius:1rem;margin-bottom:1.25rem;font-size:.95rem;color:var(--color-text)!important;font-weight:600;box-shadow:0 2px 8px #0000000d}.math-answer strong{color:var(--color-text)!important;font-weight:700}.math-explanation{padding:1.25rem;background:var(--card-bg)!important;border-radius:1rem;line-height:1.6;box-shadow:0 2px 8px #0000000d;border:1px solid var(--color-border)}.math-explanation strong{display:block;margin-bottom:.5rem;color:var(--color-text)!important;font-weight:700}.math-explanation p{color:var(--color-text)!important;font-weight:600;font-size:.95rem}.study-tip{font-size:1rem;line-height:1.7;color:var(--color-text)!important;font-weight:600;padding:1.25rem;background:linear-gradient(135deg,#0000001a,#3333330d);border-radius:1rem;border-left:4px solid var(--color-primary);box-shadow:0 2px 8px #0000000d}.history-section{margin-top:3rem;animation:fadeInUp .6s ease .2s both}.history-header{display:flex;justify-content:space-between;align-items:center;margin-bottom:1rem}.history-header h3{font-size:1.25rem;color:var(--color-text-on-dark)}.clear-button{padding:.625rem 1.25rem;background:transparent;color:var(--color-primary-hover);border:2px solid var(--color-primary-hover);border-radius:1rem;font-size:.875rem;cursor:pointer;transition:var(--transition);font-weight:600;box-shadow:0 2px 8px #0003}.clear-button:hover{background:#0003;border-color:var(--color-primary-light);color:var(--color-text-on-dark);transform:translateY(-2px);box-shadow:0 4px 12px #b899d64d}.history-list{display:grid;gap:.75rem}.history-item-wrapper{display:flex;align-items:center;gap:.5rem;position:relative}.history-item{display:flex;justify-content:space-between;align-items:center;padding:1.5rem 1.75rem;background:var(--card-bg);border:1px solid var(--card-border);border-radius:1.5rem;cursor:pointer;transition:var(--transition);text-align:left;flex:1;-webkit-backdrop-filter:blur(20px);backdrop-filter:blur(20px);box-shadow:0 4px 16px #00000014}.history-item:hover{border-color:var(--color-primary-hover);background:var(--color-surface);transform:translate(6px) translateY(-2px);box-shadow:0 12px 32px #00000040,0 0 0 1px #0003;border-width:2px}.history-delete{padding:.625rem;background:transparent;border:2px solid var(--color-error);border-radius:.75rem;cursor:pointer;font-size:1rem;transition:var(--transition);display:flex;align-items:center;justify-content:center;min-width:40px;height:40px;color:var(--color-error);box-shadow:0 2px 8px #ef444433}.history-delete:hover{background:var(--color-error);color:#fff;transform:scale(1.1);box-shadow:0 4px 12px #ef444466}.history-topic{display:flex;align-items:center;gap:.5rem;font-weight:500;color:var(--color-text)}.history-icon{font-size:1.25rem}.history-time{font-size:.875rem;color:var(--color-text-secondary)}.footer{text-align:center;margin-top:4rem;padding-top:2rem;border-top:2px solid var(--card-border);color:var(--color-text-on-dark)}.footer p{margin:.5rem 0;color:var(--color-text-on-dark);font-size:.95rem}.footer-small{font-size:.875rem;opacity:.8;color:var(--color-text-on-dark)}@keyframes fadeIn{0%{opacity:0}to{opacity:1}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(20px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInDown{0%{opacity:0;transform:translateY(-20px)}to{opacity:1;transform:translateY(0)}}@keyframes spin{to{transform:rotate(360deg)}}@keyframes bounce{0%,to{transform:translateY(0)}50%{transform:translateY(-10px)}}@keyframes shake{0%,to{transform:translate(0)}25%{transform:translate(-10px)}75%{transform:translate(10px)}}.landing-page{min-height:100vh;background:linear-gradient(135deg,#000,#1a1a1a,#333);display:flex;flex-direction:column;align-items:center;justify-content:center;padding:2rem;position:relative;overflow:hidden}.landing-nav{position:absolute;top:2rem;right:2rem;z-index:10;display:flex;gap:1rem;align-items:center}.landing-nav-buttons,.landing-nav-user{display:flex;gap:.75rem;align-items:center}.landing-nav-username{color:#ffffffe6;font-size:.95rem;font-weight:500}.landing-nav-button{padding:.75rem 1.5rem;font-size:.95rem;font-weight:600;border:none;border-radius:.5rem;cursor:pointer;transition:var(--transition);text-decoration:none;display:inline-block;letter-spacing:.5px}.landing-nav-button.primary{background:#666;color:#000;box-shadow:0 4px 15px #0000004d}.landing-nav-button.primary:hover{background:#333;transform:translateY(-2px);box-shadow:0 6px 20px #0006}.landing-nav-button.secondary{background:transparent;color:#fff;border:2px solid #666666}.landing-nav-button.secondary:hover{background:#0003;border-color:#333}.landing-nav-button:not(.primary):not(.secondary){background:#000;color:#fff}.landing-nav-button:not(.primary):not(.secondary):hover{background:#666;color:#000}.landing-page:before{content:"";position:absolute;top:0;left:0;right:0;bottom:0;background:radial-gradient(circle at 20% 50%,rgba(0,0,0,.1) 0%,transparent 50%),radial-gradient(circle at 80% 80%,rgba(51,51,51,.1) 0%,transparent 50%);pointer-events:none}.landing-hero{max-width:1200px;width:100%;z-index:1;position:relative}.landing-content{text-align:left;color:#fff;max-width:1400px;margin:0 auto;padding:0 3rem}.landing-title{font-size:5rem;font-weight:900;margin-bottom:1.5rem;display:flex;align-items:flex-start;justify-content:flex-start;gap:1rem;animation:fadeInDown .8s ease;line-height:1.1;max-width:900px}.landing-icon{font-size:4rem;animation:bounce 2s infinite}.landing-subtitle{font-size:1.75rem;color:#ccc;margin-bottom:2rem;font-weight:400;animation:fadeInUp .8s ease .2s both;max-width:800px}.landing-description{font-size:1.25rem;color:#ffffffd9;max-width:750px;margin:0 0 4rem;line-height:1.8;animation:fadeInUp .8s ease .4s both}.landing-features{display:grid;grid-template-columns:repeat(2,1fr);gap:2.5rem;margin:4rem 0;animation:fadeInUp .8s ease .6s both;max-width:1000px}.feature-card{background:#ffffff0d;-webkit-backdrop-filter:blur(10px);backdrop-filter:blur(10px);border:2px solid rgba(255,255,255,.15);border-radius:.5rem;padding:2.5rem;transition:var(--transition);text-align:left}.feature-card:hover{transform:translate(10px) translateY(-3px);background:#ffffff1a;border-color:#ccc;box-shadow:0 10px 30px #0000004d}.feature-icon{font-size:3rem;margin-bottom:1rem}.feature-card h3{font-size:1.5rem;margin-bottom:1rem;color:#fff;font-weight:700;text-transform:uppercase;letter-spacing:.5px}.feature-card p{font-size:1rem;color:#ffffffbf;line-height:1.7}.landing-actions{display:flex;gap:1.5rem;justify-content:flex-start;margin:4rem 0;animation:fadeInUp .8s ease .8s both}.landing-button{padding:1rem 2.5rem;font-size:1.125rem;font-weight:600;border:none;border-radius:.75rem;cursor:pointer;transition:var(--transition);text-decoration:none;display:inline-block}.landing-button.primary{background:#666;color:#000;box-shadow:0 4px 15px #0006}.landing-button.primary:hover{background:#333;transform:translateY(-2px);box-shadow:0 6px 20px #00000080}.landing-button.secondary{background:transparent;color:#fff;border:2px solid #666666}.landing-button.secondary:hover{background:#0003;border-color:#333}.landing-stats{display:flex;justify-content:flex-start;gap:5rem;margin-top:5rem;animation:fadeInUp .8s ease 1s both;border-top:2px solid rgba(255,255,255,.2);padding-top:3rem;max-width:900px}.stat-item{text-align:left}.stat-number{font-size:3rem;font-weight:800;color:#fff;margin-bottom:.75rem;text-transform:uppercase;letter-spacing:1px}.stat-label{font-size:1rem;color:#ffffffb3;text-transform:uppercase;letter-spacing:2px;font-weight:500}@keyframes fadeInDown{0%{opacity:0;transform:translateY(-30px)}to{opacity:1;transform:translateY(0)}}@keyframes fadeInUp{0%{opacity:0;transform:translateY(30px)}to{opacity:1;transform:translateY(0)}}@media (max-width: 768px){.landing-nav{top:1rem;right:1rem;flex-direction:column;gap:.5rem}.landing-nav-buttons{flex-direction:column;width:100%}.landing-nav-button{width:120px;text-align:center;padding:.6rem 1rem;font-size:.875rem}.landing-content{padding:0 1.5rem;text-align:left}.landing-title{font-size:3rem;flex-direction:column;align-items:flex-start;justify-content:flex-start}.landing-icon{font-size:3rem}.landing-subtitle{font-size:1.5rem}.landing-description{font-size:1.1rem;margin:0 0 3rem}.landing-features{grid-template-columns:1fr;gap:2rem}.landing-actions{flex-direction:column;align-items:flex-start}.landing-button{width:100%;max-width:300px}.landing-stats{flex-direction:column;gap:2.5rem;align-items:flex-start}}@media (max-width: 768px){.container{padding:1rem}.title,.icon{font-size:2rem}.theme-toggle{top:1rem;right:1rem;width:45px;height:45px}.study-form{padding:1.5rem}.results-header{flex-direction:column;align-items:flex-start}.section{padding:1.25rem}.history-item{flex-direction:column;align-items:flex-start;gap:.5rem}}@media (prefers-reduced-motion: reduce){*,*:before,*:after{animation-duration:.01ms!important;animation-iteration-count:1!important;transition-duration:.01ms!important}}