:root{--cada-blue:#4badd1;--cada-blue-dark:#3a9ec4;--cada-navy:#1c2b4a;--color-primary:#1c2b4a;--color-accent:#4badd1;--color-accent-hover:#3a9ec4;--color-bg:#fff;--color-surface:#f2f6fa;--color-surface-2:#e8eff6;--color-border:#d4e1ec;--color-text:#1c2b4a;--color-text-muted:#6b7d92;--color-error:#dc2626;--color-error-bg:#fef2f2;--radius-sm:6px;--radius-md:12px;--radius-lg:20px;--shadow-card:0 2px 10px #1c2b4a14;--shadow-fab:0 4px 20px #4badd166;--font-sans:system-ui, -apple-system, BlinkMacSystemFont, "Segoe UI", sans-serif}[data-theme=dark]{--color-bg:#0e1824;--color-surface:#172030;--color-surface-2:#1f2c40;--color-border:#4badd126;--color-text:#e2eaf2;--color-text-muted:#7a94aa;--color-error-bg:#dc26261f;--shadow-card:0 2px 10px #0000004d}html,body,#root{height:100%;font-family:var(--font-sans);color:var(--color-text);background:var(--color-bg);-webkit-font-smoothing:antialiased;font-size:16px;transition:background .25s,color .25s}.btn:active:not(:disabled){transform:scale(.97)}.theme-switch{cursor:pointer;-webkit-user-select:none;user-select:none;flex-shrink:0;align-items:center;gap:.375rem;display:inline-flex}.theme-switch__input{opacity:0;width:0;height:0;position:absolute}.theme-switch__track{background:var(--color-surface-2);border-radius:11px;flex-shrink:0;width:40px;height:22px;transition:background .25s;position:relative}.theme-switch__input:checked+.theme-switch__track{background:var(--cada-blue)}.theme-switch__thumb{background:#fff;border-radius:50%;width:16px;height:16px;transition:transform .25s cubic-bezier(.4,0,.2,1);position:absolute;top:3px;left:3px;box-shadow:0 1px 4px #00000040}.theme-switch__input:checked+.theme-switch__track .theme-switch__thumb{transform:translate(18px)}.theme-switch__icon{font-size:.875rem;line-height:1}.login-view{background:var(--color-bg);flex-direction:column;min-height:100%;display:flex}.login-view__hero{background:var(--color-surface);padding:calc(3rem + env(safe-area-inset-top)) 2rem 2.5rem;flex-direction:column;justify-content:center;align-items:center;display:flex;position:relative;overflow:hidden}.login-view__hero:after{content:"";background:var(--color-bg);border-radius:50% 50% 0 0/100% 100% 0 0;height:40px;transition:background .25s;position:absolute;bottom:-20px;left:0;right:0}.login-view__logo{object-fit:contain;border-radius:var(--radius-md);z-index:1;width:100%;max-width:300px;position:relative}.login-view__body{flex-direction:column;flex:1;align-items:center;padding:2.5rem 1.5rem 2rem;display:flex}.login-view__subtitle{color:var(--color-text-muted);margin-bottom:1.5rem;font-size:1rem;font-weight:500}.login-view__loading{color:var(--color-text-muted);margin-top:1rem}.login-view__submit{width:100%;margin-top:.25rem}.student-selector__label{color:var(--color-text-muted);text-transform:uppercase;letter-spacing:.04em;font-size:.875rem;font-weight:600}.student-selector__select{border:1.5px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-bg);color:var(--color-text);appearance:none;background-image:url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='8' viewBox='0 0 12 8'%3E%3Cpath d='M1 1l5 5 5-5' stroke='%234BADD1' stroke-width='2' fill='none' stroke-linecap='round'/%3E%3C/svg%3E");background-position:right 1rem center;background-repeat:no-repeat;width:100%;padding:.875rem 2.5rem .875rem 1rem;font-size:1rem;transition:border-color .2s}.student-selector__select:focus{border-color:var(--cada-blue);outline:none;box-shadow:0 0 0 3px #4badd12e}.dashboard-view__header{padding:calc(.75rem + env(safe-area-inset-top)) 1.25rem .75rem;border-bottom:1px solid var(--color-border);background:var(--color-bg);z-index:10;align-items:center;gap:.75rem;transition:background .25s,border-color .25s;display:flex;position:sticky;top:0}.dashboard-view__logo{object-fit:contain;border-radius:4px;flex-shrink:0;width:auto;height:30px}.dashboard-view__spacer{flex:1}.dashboard-view__student{color:var(--color-text-muted);white-space:nowrap;text-overflow:ellipsis;max-width:140px;font-size:.8rem;overflow:hidden}.dashboard-view__logout{color:var(--color-accent);cursor:pointer;background:0 0;border:none;padding:.25rem .5rem;font-size:.875rem;font-weight:600}.dashboard-view__version{color:var(--color-text-muted);opacity:.55;letter-spacing:.02em;flex-shrink:0;align-self:flex-end;margin-bottom:2px;font-size:.6rem}.receipt-preview-view__back{cursor:pointer;color:var(--color-text);background:0 0;border:none;font-size:1.25rem}@keyframes indeterminate{0%{left:-50%}to{left:100%}}.skeleton-card__thumb{background:linear-gradient(90deg, var(--color-surface) 25%, var(--color-surface-2) 50%, var(--color-surface) 75%);background-size:200%;width:100%;height:85%;animation:1.4s infinite shimmer}@keyframes shimmer{0%{background-position:200% 0}to{background-position:-200% 0}}*,:before,:after{box-sizing:border-box;margin:0;padding:0}html,body,#root{height:100%;font-family:var(--font-sans);color:var(--color-text);background:var(--color-bg);-webkit-font-smoothing:antialiased;font-size:16px}.btn{border-radius:var(--radius-md);cursor:pointer;border:none;justify-content:center;align-items:center;padding:.75rem 1.5rem;font-size:1rem;font-weight:600;transition:background .2s;display:inline-flex}.btn:disabled{opacity:.5;cursor:not-allowed}.btn--primary{background:var(--color-accent);color:#fff}.btn--primary:hover:not(:disabled){background:var(--color-accent-hover)}.btn--secondary{background:var(--color-surface);color:var(--color-text);border:1px solid var(--color-border)}.login-view{flex-direction:column;justify-content:center;align-items:center;gap:2rem;min-height:100%;padding:2rem 1.5rem;display:flex}.login-view__title{color:var(--color-primary);font-size:2.5rem;font-weight:800}.login-view__subtitle{color:var(--color-text-muted);margin-top:.25rem}.login-view__form{flex-direction:column;gap:1rem;width:100%;max-width:400px;display:flex}.login-view__loading{color:var(--color-text-muted)}.login-view__submit{width:100%}.student-selector{flex-direction:column;gap:.5rem;display:flex}.student-selector__label{font-size:.875rem;font-weight:600}.student-selector__select{border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-bg);color:var(--color-text);width:100%;padding:.75rem 1rem;font-size:1rem}.dashboard-view{flex-direction:column;min-height:100%;display:flex}.dashboard-view__header{border-bottom:1px solid var(--color-border);background:var(--color-bg);z-index:10;align-items:center;gap:.75rem;padding:1rem 1.25rem;display:flex;position:sticky;top:0}.dashboard-view__title{flex:1;font-size:1.125rem;font-weight:700}.dashboard-view__student{color:var(--color-text-muted);font-size:.8rem}.dashboard-view__logout{color:var(--color-accent);cursor:pointer;background:0 0;border:none;padding:.25rem;font-weight:600}.receipt-gallery{grid-template-columns:repeat(3,1fr);gap:2px;padding:2px;display:grid}.receipt-card{background:var(--color-surface);cursor:pointer;aspect-ratio:1;border:none;flex-direction:column;width:100%;display:flex;position:relative;overflow:hidden}.receipt-card__thumb{flex:1;width:100%;overflow:hidden}.receipt-card__thumb-img{object-fit:cover;width:100%;height:100%}.receipt-card__thumb-placeholder{color:#fff;justify-content:center;align-items:center;width:100%;height:100%;font-size:1.5rem;font-weight:700;display:flex}.receipt-card__thumb-placeholder--pdf{background:#e94560}.receipt-card__thumb-placeholder--txt{background:#4a90d9}.receipt-card__thumb-placeholder--unknown{background:#888}.receipt-card__date{color:#fff;text-align:center;background:#0000008c;padding:.25rem .375rem;font-size:.65rem;position:absolute;bottom:0;left:0;right:0}.fab{background:var(--color-accent);color:#fff;cursor:pointer;width:3.5rem;height:3.5rem;box-shadow:var(--shadow-fab);z-index:50;border:none;border-radius:50%;justify-content:center;align-items:center;font-size:2rem;line-height:1;transition:background .2s,transform .1s;display:flex;position:fixed;bottom:1.5rem;right:1.5rem}.fab:active{transform:scale(.94)}.receipt-expanded{z-index:100;background:#000000f2;flex-direction:column;align-items:center;display:flex;position:fixed;inset:0}.receipt-expanded__close{color:#fff;cursor:pointer;z-index:10;background:#ffffff26;border:none;border-radius:50%;width:2.5rem;height:2.5rem;font-size:1.25rem;position:absolute;top:1rem;right:1rem}.receipt-expanded__content{flex:1;justify-content:center;align-items:center;width:100%;padding:4rem 1rem 1rem;display:flex}.receipt-expanded__image{object-fit:contain;max-width:100%;max-height:100%}.receipt-expanded__iframe{border:none;width:100%;height:100%}.receipt-expanded__fallback{text-align:center;color:#fff;flex-direction:column;gap:1rem;display:flex}.receipt-expanded__date{color:#fff9;padding:.75rem;font-size:.875rem}.receipt-preview-view{flex-direction:column;min-height:100%;display:flex}.receipt-preview-view__header{border-bottom:1px solid var(--color-border);align-items:center;gap:1rem;padding:1rem 1.25rem;display:flex}.receipt-preview-view__back{cursor:pointer;background:0 0;border:none;font-size:1.25rem}.receipt-preview-view__title{font-size:1.125rem;font-weight:700}.receipt-preview-view__file-input{display:none}.receipt-preview-view__preview{flex:1;justify-content:center;align-items:center;padding:1rem;display:flex;overflow:auto}.receipt-preview-view__actions{border-top:1px solid var(--color-border);gap:1rem;padding:1rem 1.25rem;display:flex}.receipt-preview-view__actions .btn{flex:1}.receipt-preview-view__loading{text-align:center;color:var(--color-text-muted);padding:2rem}.file-preview__image{object-fit:contain;border-radius:var(--radius-md);max-width:100%;max-height:60vh}.file-preview__pdf{border:1px solid var(--color-border);border-radius:var(--radius-md);width:100%;height:60vh}.file-preview__txt{white-space:pre-wrap;background:var(--color-surface);border-radius:var(--radius-md);width:100%;max-height:60vh;padding:1rem;font-family:monospace;font-size:.875rem;overflow:auto}.file-preview__fallback,.file-preview__unsupported{text-align:center;color:var(--color-text-muted);padding:2rem}.file-preview__filename{color:var(--color-text);font-weight:600}.upload-progress{flex-direction:column;justify-content:center;align-items:center;gap:1rem;min-height:100vh;display:flex}.upload-progress__label{color:var(--color-text-muted);font-size:1rem}.upload-progress__bar{border-radius:3px;width:200px;height:6px}.upload-progress__indeterminate{background:var(--color-border);border-radius:3px;width:200px;height:6px;position:relative;overflow:hidden}.upload-progress__indeterminate:after{content:"";background:var(--color-accent);border-radius:3px;width:50%;height:100%;animation:1.4s ease-in-out infinite indeterminate;position:absolute;top:0;left:-50%}.dialog-overlay{z-index:200;background:#00000080;align-items:flex-end;display:flex;position:fixed;inset:0}.dialog{background:var(--color-bg);border-radius:var(--radius-lg) var(--radius-lg) 0 0;flex-direction:column;gap:1rem;width:100%;padding:1.5rem;display:flex}.dialog__title{font-size:1.125rem;font-weight:700}.dialog__body{color:var(--color-text-muted)}.dialog__actions{gap:.75rem;display:flex}.dialog__btn{border-radius:var(--radius-md);cursor:pointer;border:none;flex:1;padding:.75rem;font-weight:600}.dialog__btn--secondary{background:var(--color-surface);color:var(--color-text)}.dialog__btn--danger{background:var(--color-error);color:#fff}.skeleton-grid{grid-template-columns:repeat(3,1fr);gap:2px;padding:2px;display:grid}.skeleton-card{aspect-ratio:1;background:var(--color-surface);overflow:hidden}.skeleton-card__thumb{background:linear-gradient(90deg,#eee 25%,#f5f5f5 50%,#eee 75%) 0 0/200%;width:100%;height:85%;animation:1.4s infinite shimmer}.skeleton-card__date{background:#e5e5e5;height:15%}.empty-state{flex-direction:column;flex:1;justify-content:center;align-items:center;gap:.5rem;padding:3rem 1.5rem;display:flex}.empty-state__message{color:var(--color-text);text-align:center;font-size:1rem;font-weight:600}.empty-state__hint{color:var(--color-text-muted);text-align:center;font-size:.875rem}.error-message{background:var(--color-error-bg);border:1px solid var(--color-error);border-radius:var(--radius-md);flex-direction:column;gap:.5rem;margin:.75rem 1.25rem;padding:.875rem 1rem;display:flex}.error-message__text{color:var(--color-error);font-size:.875rem}.error-message__retry{color:var(--color-error);cursor:pointer;background:0 0;border:none;align-self:flex-start;font-size:.875rem;font-weight:600;text-decoration:underline}.share-receiver-view{min-height:100vh;color:var(--color-text-muted);justify-content:center;align-items:center;display:flex}.dashboard-view__header{padding-top:calc(.75rem + env(safe-area-inset-top))}.receipt-preview-view__header{padding-top:calc(1rem + env(safe-area-inset-top))}.login-view__hero{padding-top:calc(3rem + env(safe-area-inset-top))}.fab{bottom:calc(1.5rem + env(safe-area-inset-bottom));right:calc(1.5rem + env(safe-area-inset-right))}.receipt-preview-view__actions{padding-bottom:calc(1rem + env(safe-area-inset-bottom))}.receipt-expanded__close{top:calc(1rem + env(safe-area-inset-top));right:calc(1rem + env(safe-area-inset-right))}.receipt-expanded__content{padding:calc(4rem + env(safe-area-inset-top)) 1rem calc(1rem + env(safe-area-inset-bottom))}.dialog{padding-bottom:calc(1.5rem + env(safe-area-inset-bottom))}