:root{--bg: #fbf6f4;--surface: #ffffff;--surface-sunken: #f4ece9;--surface-raised: #ffffff;--ink: #2f2729;--ink-muted: #7d6f6d;--ink-faint: #a89b98;--ink-inverse: #ffffff;--border: #ece0dc;--border-strong: #ddcbc5;--primary: #b8465e;--primary-strong: #9a3850;--primary-soft: #f7e4e8;--primary-tint: #fdf2f4;--period: #b8465e;--period-soft: #f7dfe4;--predicted: #d99aa8;--fertile: #5c9b86;--fertile-soft: #e2f0eb;--ovulation: #3d7f6a;--danger: #b03535;--danger-soft: #fbeaea;--success: #3d7f6a;--focus-ring: #b8465e;--font-ui: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;--font-display: "Iowan Old Style", "Palatino Linotype", Palatino, Georgia, serif}*{margin:0;padding:0;box-sizing:border-box;-webkit-tap-highlight-color:transparent}html{height:100%}body{min-height:100%;background-color:var(--bg);color:var(--ink);font-family:var(--font-ui);font-size:15px;line-height:1.5;-webkit-font-smoothing:antialiased;overscroll-behavior-y:none}body.is-sheet-open{overflow:hidden}button,input,select,textarea{font:inherit;color:inherit}button{background:none;border:none;cursor:pointer}a{color:inherit}:focus-visible{outline:2px solid var(--focus-ring);outline-offset:2px;border-radius:6px}@media(prefers-reduced-motion:reduce){*,*:before,*:after{animation-duration:.01ms!important;transition-duration:.01ms!important}}.page-title{font-size:24px;font-weight:600;letter-spacing:-.02em}.section-title{font-size:17px;font-weight:600;letter-spacing:-.01em}.eyebrow{font-size:11px;font-weight:600;letter-spacing:.12em;text-transform:uppercase;color:var(--ink-faint)}.display-number{font-family:var(--font-display);font-size:64px;font-weight:400;line-height:1;letter-spacing:-.03em}.lead{font-size:17px;color:var(--ink-muted)}.body-text{font-size:15px;color:var(--ink)}.caption{font-size:12px;color:var(--ink-muted);line-height:1.45}.text-muted{color:var(--ink-muted)}.text-danger{color:var(--danger)}.app-shell{min-height:100dvh;display:flex;flex-direction:column}.screen{flex:1;width:100%;max-width:480px;margin:0 auto;padding:24px 16px 112px;padding-top:calc(24px + env(safe-area-inset-top))}.screen--centered{display:flex;flex-direction:column;justify-content:center;padding-bottom:calc(48px + env(safe-area-inset-bottom))}.screen-header{display:flex;align-items:baseline;justify-content:space-between;gap:12px;margin-bottom:24px}.stack{display:flex;flex-direction:column;gap:16px}.stack--tight{display:flex;flex-direction:column;gap:8px}.stack--loose{display:flex;flex-direction:column;gap:24px}.row{display:flex;align-items:center;gap:8px}.row--spread{display:flex;align-items:center;justify-content:space-between;gap:12px}.divider{height:1px;background:var(--border);border:none}.chip,.btn-danger,.btn-ghost,.btn-secondary,.btn-primary{display:inline-flex;align-items:center;justify-content:center;gap:8px;min-height:44px;padding:8px 16px;border-radius:999px;font-size:15px;font-weight:600;text-decoration:none;transition:background-color .12s ease,color .12s ease,opacity .12s ease}.chip:disabled,.btn-danger:disabled,.btn-ghost:disabled,.btn-secondary:disabled,.btn-primary:disabled{opacity:.45;cursor:not-allowed}.btn-primary{background:var(--primary);color:var(--ink-inverse)}.btn-primary:hover:not(:disabled){background:var(--primary-strong)}.btn-secondary{background:var(--surface);color:var(--ink);border:1px solid var(--border-strong)}.btn-secondary:hover:not(:disabled){background:var(--surface-sunken)}.btn-ghost{background:transparent;color:var(--primary);padding-inline:12px}.btn-danger{background:var(--danger-soft);color:var(--danger)}.btn-block{width:100%}.btn-link{background:none;color:var(--primary);font-size:13px;font-weight:500;text-decoration:underline;text-underline-offset:3px;padding:4px}.chip{min-height:36px;padding:4px 12px;background:var(--surface);border:1px solid var(--border);color:var(--ink-muted);font-size:13px;font-weight:500}.chip--selected{background:var(--primary-soft);border-color:var(--primary);color:var(--primary-strong)}.icon-button{display:inline-flex;align-items:center;justify-content:center;width:44px;height:44px;border-radius:999px;color:var(--ink-muted)}.icon-button:hover{background:var(--surface-sunken)}.card{background:var(--surface);border:1px solid var(--border);border-radius:16px;padding:16px;box-shadow:0 1px 2px #3a282a0f}.card--flush{padding:0;overflow:hidden}.card--tinted{background:var(--primary-tint);border-color:var(--primary-soft)}.card-header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:12px}.list-row{display:flex;align-items:center;justify-content:space-between;gap:12px;width:100%;min-height:44px;padding:12px 16px;border-bottom:1px solid var(--border);text-align:left}.list-row:last-child{border-bottom:none}.list-row__label{display:flex;flex-direction:column;gap:2px}.stat-grid{display:grid;grid-template-columns:repeat(3,1fr);gap:8px}.stat-tile{display:flex;flex-direction:column;gap:2px;padding:12px;background:var(--surface);border:1px solid var(--border);border-radius:10px;text-align:center}.stat-tile__value{font-size:20px;font-weight:600;letter-spacing:-.02em}.stat-tile__label{font-size:11px;color:var(--ink-muted);line-height:1.3}.empty-state{display:flex;flex-direction:column;align-items:center;gap:12px;padding:32px 16px;text-align:center;color:var(--ink-muted)}.field{display:flex;flex-direction:column;gap:4px}.field__label{font-size:13px;font-weight:500;color:var(--ink-muted)}.field__hint{font-size:12px;color:var(--ink-faint)}.input{width:100%;min-height:44px;padding:8px 12px;background:var(--surface);border:1px solid var(--border-strong);border-radius:10px;font-size:15px;transition:border-color .12s ease}.input:focus{border-color:var(--primary);outline:none}.input::placeholder{color:var(--ink-faint)}.input--textarea{min-height:88px;resize:vertical;line-height:1.5}.stepper{display:flex;align-items:center;gap:8px}.stepper__button{display:inline-flex;align-items:center;justify-content:center;width:36px;height:36px;border:1px solid var(--border-strong);border-radius:999px;background:var(--surface);font-size:17px;line-height:1}.stepper__button:disabled{opacity:.4}.stepper__value{min-width:64px;text-align:center;font-size:15px;font-weight:600}.switch{position:relative;flex-shrink:0;width:48px;height:28px;border-radius:999px;background:var(--border-strong);transition:background-color .2s ease}.switch:after{content:"";position:absolute;top:3px;left:3px;width:22px;height:22px;border-radius:50%;background:var(--surface);box-shadow:0 1px 2px #3a282a0f;transition:transform .2s ease}.switch--on{background:var(--primary)}.switch--on:after{transform:translate(20px)}.form-error{padding:8px 12px;background:var(--danger-soft);border-radius:10px;color:var(--danger);font-size:13px}.form-success{padding:8px 12px;background:var(--fertile-soft);border-radius:10px;color:var(--success);font-size:13px}.auth-header{display:flex;flex-direction:column;align-items:center;gap:4px;margin-bottom:48px;text-align:center}.auth-brand{font-family:var(--font-display);font-size:32px;font-weight:400;letter-spacing:.02em;color:var(--primary)}.auth-switch{align-self:center;margin-top:8px}.sheet-overlay{position:fixed;inset:0;z-index:50;background:#2f272959;-webkit-backdrop-filter:blur(2px);backdrop-filter:blur(2px);animation:sheet-fade-in .2s ease}.sheet{position:fixed;z-index:51;left:0;right:0;bottom:0;max-height:88dvh;width:100%;max-width:480px;margin:0 auto;padding:8px 16px calc(24px + env(safe-area-inset-bottom));background:var(--surface);border-radius:24px 24px 0 0;box-shadow:0 12px 40px #3a282a24;overflow-y:auto;animation:sheet-slide-up .28s cubic-bezier(.32,.72,0,1)}.sheet__grabber{width:40px;height:4px;margin:4px auto 16px;border-radius:999px;background:var(--border-strong)}.sheet__header{display:flex;align-items:center;justify-content:space-between;gap:12px;margin-bottom:16px}.sheet__footer{display:flex;gap:8px;margin-top:24px}@keyframes sheet-fade-in{0%{opacity:0}to{opacity:1}}@keyframes sheet-slide-up{0%{transform:translateY(100%)}to{transform:translateY(0)}}.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}.dot{display:inline-block;width:8px;height:8px;border-radius:50%;flex-shrink:0}.dot--period{background:var(--period)}.dot--predicted{background:var(--predicted)}.dot--fertile{background:var(--fertile)}.dot--ovulation{background:var(--ovulation)}.legend{display:flex;flex-wrap:wrap;gap:12px}.legend__item{display:flex;align-items:center;gap:4px;font-size:12px;color:var(--ink-muted)}.spinner{width:20px;height:20px;border:2px solid var(--border-strong);border-top-color:var(--primary);border-radius:50%;animation:spin .7s linear infinite}@keyframes spin{to{transform:rotate(360deg)}}