.toast-container{position:fixed;top:var(--space-6);right:var(--space-6);display:flex;flex-direction:column;gap:var(--space-2);z-index:var(--z-toast);pointer-events:none}.toast{display:flex;align-items:flex-start;gap:var(--space-3);padding:var(--space-3) var(--space-4);border-radius:var(--radius-lg);box-shadow:var(--shadow-lg);background:var(--color-bg-surface);border:1px solid var(--color-border);min-width:280px;max-width:420px;pointer-events:all;animation:toast-in var(--transition-slow) ease both}.toast--success{border-left:3px solid var(--color-success)}.toast--error{border-left:3px solid var(--color-error)}.toast--warning{border-left:3px solid var(--color-warning)}.toast--info{border-left:3px solid var(--color-info)}.toast__icon{flex-shrink:0;width:18px;height:18px;margin-top:1px}.toast--success .toast__icon{color:var(--color-success)}.toast--error .toast__icon{color:var(--color-error)}.toast--warning .toast__icon{color:var(--color-warning)}.toast--info .toast__icon{color:var(--color-info)}.toast__message{flex:1;font-size:var(--font-size-sm);font-weight:var(--font-weight-medium);color:var(--color-text);line-height:var(--line-height-normal)}.toast__close{flex-shrink:0;padding:var(--space-1);border-radius:var(--radius-sm);color:var(--color-text-muted);transition:background var(--transition-fast);line-height:1}.toast__close:hover{background:var(--color-bg-subtle);color:var(--color-text)}@keyframes toast-in{0%{opacity:0;transform:translateY(-8px) scale(.97)}to{opacity:1;transform:translateY(0) scale(1)}}@media(max-width:639px){.toast-container{right:var(--space-3);left:var(--space-3);top:var(--space-3)}.toast{min-width:0;max-width:calc(100vw - 2 * var(--space-3));width:100%}}.dialog-backdrop{position:fixed;inset:0;background:#0006;display:flex;align-items:center;justify-content:center;z-index:var(--z-modal);animation:backdrop-in var(--transition-base) ease}.dialog{background:var(--color-bg-surface);border-radius:var(--radius-xl);box-shadow:var(--shadow-xl);padding:var(--space-6);width:min(440px,calc(100vw - var(--space-8)));animation:dialog-in var(--transition-slow) ease}.dialog__title{font-size:var(--font-size-lg);font-weight:var(--font-weight-semibold);color:var(--color-text);margin-bottom:var(--space-2)}.dialog__message{font-size:var(--font-size-sm);color:var(--color-text-muted);line-height:var(--line-height-loose);margin-bottom:var(--space-6)}.dialog__actions{display:flex;justify-content:flex-end;gap:var(--space-2)}@keyframes backdrop-in{0%{opacity:0}to{opacity:1}}@keyframes dialog-in{0%{opacity:0;transform:scale(.96) translateY(6px)}to{opacity:1;transform:scale(1) translateY(0)}}.btn{display:inline-flex;align-items:center;gap:var(--space-2);padding:var(--space-2) var(--space-4);font-size:var(--font-size-sm);font-weight:var(--font-weight-medium);border-radius:var(--radius-md);cursor:pointer;border:1px solid transparent;transition:background var(--transition-fast),border-color var(--transition-fast),color var(--transition-fast),box-shadow var(--transition-fast);white-space:nowrap;-webkit-user-select:none;user-select:none;outline:none}.btn:focus-visible{box-shadow:0 0 0 3px var(--color-primary-light)}.btn:disabled{opacity:.5;cursor:not-allowed}.btn--primary{background:var(--color-primary);color:var(--color-text-inverse);border-color:var(--color-primary)}.btn--primary:hover:not(:disabled){background:var(--color-primary-hover);border-color:var(--color-primary-hover)}.btn--secondary{background:var(--color-bg-surface);color:var(--color-text);border-color:var(--color-border)}.btn--secondary:hover:not(:disabled){background:var(--color-bg-subtle)}.btn--danger{background:var(--color-error);color:var(--color-text-inverse);border-color:var(--color-error)}.btn--danger:hover:not(:disabled){background:color-mix(in srgb,var(--color-error) 85%,#000);border-color:color-mix(in srgb,var(--color-error) 85%,#000)}.btn--ghost{background:transparent;color:var(--color-text-muted);border-color:transparent}.btn--ghost:hover:not(:disabled){background:var(--color-bg-subtle);color:var(--color-text)}.btn--sm{padding:var(--space-1) var(--space-3);font-size:var(--font-size-xs)}.btn--lg{padding:var(--space-3) var(--space-6);font-size:var(--font-size-md)}@media(max-width:639px){.btn{min-height:44px}.btn--sm{min-height:36px}}:root{--color-bg: #FAF9F7;--color-bg-surface: #ffffff;--color-bg-subtle: #F0EBE2;--color-text: #1E293B;--color-text-muted: #44546a;--color-text-inverse: #ffffff;--color-primary: #b5622a;--color-primary-hover: #9e5425;--color-primary-light: #f5e8dc;--color-secondary: #64748B;--color-secondary-hover: #334155;--color-success: #2d6245;--color-success-light: #e4f0ea;--color-warning: #d97706;--color-warning-light: #fef3c7;--color-error: #b83232;--color-error-light: #fdf1f1;--color-info: #0284c7;--color-info-light: #e0f2fe;--color-border: #E8E5DF;--color-border-focus: #b5622a;--color-ink-mid: #334155;--color-ink-faint: #94A3B8;--color-border-strong: #d5cfc6;--color-copper-border: #d9936a;--color-lesson: #4f6ef7;--color-private-lesson: #7c3aed;--color-diagnostic: #0891b2;--color-appointment: #059669;--color-reminder: #d97706;--color-status-active: #16a34a;--color-status-completed: #6b7280;--color-status-unpaid: #d97706;--color-status-cancelled: #dc2626;--space-1: 4px;--space-2: 8px;--space-3: 12px;--space-4: 16px;--space-5: 20px;--space-6: 24px;--space-8: 32px;--space-10: 40px;--space-12: 48px;--space-16: 64px;--spacing-xs: var(--space-1);--spacing-sm: var(--space-2);--spacing-md: var(--space-4);--spacing-lg: var(--space-6);--spacing-xl: var(--space-8);--radius-xs: 3px;--radius-sm: 4px;--radius-md: 8px;--radius-lg: 12px;--radius-xl: 16px;--radius-full: 9999px;--shadow-xs: 0 1px 2px rgba(0, 0, 0, .04);--shadow-sm: 0 1px 3px rgba(0, 0, 0, .08), 0 1px 2px rgba(0, 0, 0, .04);--shadow-md: 0 4px 6px rgba(0, 0, 0, .07), 0 2px 4px rgba(0, 0, 0, .04);--shadow-lg: 0 10px 15px rgba(0, 0, 0, .08), 0 4px 6px rgba(0, 0, 0, .04);--shadow-xl: 0 20px 25px rgba(0, 0, 0, .1), 0 8px 10px rgba(0, 0, 0, .04);--shadow-card: 0 1px 3px rgba(30, 41, 59, .06), 0 1px 2px rgba(30, 41, 59, .04);--shadow-card-hover: 0 8px 24px rgba(30, 41, 59, .1), 0 2px 6px rgba(30, 41, 59, .06);--font-family: "DM Sans", system-ui, -apple-system, sans-serif;--font-family-display: "Outfit", system-ui, -apple-system, sans-serif;--font-family-mono: "JetBrains Mono", "Fira Code", ui-monospace, monospace;--font-size-3xs: 9px;--font-size-2xs: 10px;--font-size-xs: 11px;--font-size-sm: 13px;--font-size-base: 14px;--font-size-md: 15px;--font-size-lg: 17px;--font-size-xl: 20px;--font-size-2xl: 24px;--font-size-3xl: 30px;--font-size-4xl: 28px;--font-size-5xl: 32px;--font-size-6xl: 40px;--font-size-hero: 64px;--font-weight-normal: 400;--font-weight-medium: 500;--font-weight-semibold: 600;--font-weight-bold: 700;--line-height-tight: 1.25;--line-height-normal: 1.5;--line-height-loose: 1.75;--sidebar-width: 240px;--topbar-height: 44px;--content-max-width: 1200px;--session-rail-width: 3px;--transition-fast: 80ms ease;--transition-base: .15s ease;--transition-slow: .3s ease;--z-base: 0;--z-raised: 10;--z-sticky: 300;--z-overlay: 400;--z-sidebar-backdrop: 390;--z-sidebar: 395;--z-modal-backdrop: 490;--z-modal: 500;--z-toast: 600;--z-dropdown: 600}*,*:before,*:after{box-sizing:border-box;margin:0;padding:0}html{font-size:var(--font-size-base);-webkit-text-size-adjust:100%;scroll-behavior:smooth;overflow-x:hidden}body{font-family:var(--font-family);font-size:var(--font-size-base);line-height:var(--line-height-normal);color:var(--color-text);background:var(--color-bg);min-height:100dvh;overflow-x:hidden;-webkit-font-smoothing:antialiased;-moz-osx-font-smoothing:grayscale}h1,h2,h3,h4,h5,h6{font-weight:var(--font-weight-semibold);line-height:var(--line-height-tight);color:var(--color-text)}p{line-height:var(--line-height-normal)}a{color:var(--color-primary);text-decoration:none}a:hover{text-decoration:underline}input,textarea,select,button{font-family:inherit;font-size:inherit}input,textarea,select{width:100%;padding:var(--space-2) var(--space-3);border:1px solid var(--color-border);border-radius:var(--radius-md);background:var(--color-bg-surface);color:var(--color-text);transition:border-color var(--transition-fast),box-shadow var(--transition-fast);outline:none}input:focus,textarea:focus,select:focus{border-color:var(--color-border-focus);box-shadow:0 0 0 3px var(--color-primary-light)}input::placeholder,textarea::placeholder{color:var(--color-text-muted)}button{cursor:pointer;border:none;background:none;border-radius:var(--radius-md);transition:background var(--transition-fast),color var(--transition-fast),box-shadow var(--transition-fast)}button:disabled{opacity:.5;cursor:not-allowed}ul,ol{list-style:none}img,svg{display:block;max-width:100%}.sr-only{position:absolute;width:1px;height:1px;padding:0;margin:-1px;overflow:hidden;clip:rect(0,0,0,0);white-space:nowrap;border:0}.truncate{overflow:hidden;white-space:nowrap;text-overflow:ellipsis}