/* Dark theme (default) */
:root, .dark {
    --accent: #22c55e;
    --accent-rgb: 34, 197, 94;
    --accent-dark: #16a34a;
    --accent-darker: #15803d;
    --background: #09090b;
    --foreground: #fafafa;
    --card: #18181b;
    --card-hover: #27272a;
    --primary: #fafafa;
    --primary-foreground: #18181b;
    --secondary: #27272a;
    --muted: #27272a;
    --muted-foreground: #a1a1aa;
    --border: #27272a;
    --destructive: #7f1d1d;
    --scrollbar-track: #18181b;
    --scrollbar-thumb: #27272a;
    --scrollbar-thumb-hover: #3f3f46;
    --modal-backdrop: rgba(0, 0, 0, 0.8);
}

/* Light theme */
.light {
    --accent: #22c55e;
    --accent-rgb: 34, 197, 94;
    --accent-dark: #16a34a;
    --accent-darker: #15803d;
    --background: #fcfcfd;
    --foreground: #09090b;
    --card: #ffffff;
    --card-hover: #f4f5f7;
    --primary: #18181b;
    --primary-foreground: #fafafa;
    --secondary: #eef1f4;
    --muted: #eef1f4;
    --muted-foreground: #52525b;
    --border: #d7dce2;
    --destructive: #dc2626;
    --scrollbar-track: #f1f5f9;
    --scrollbar-thumb: #cbd5e1;
    --scrollbar-thumb-hover: #a1a1aa;
    --modal-backdrop: rgba(15, 23, 42, 0.35);
}

/* Custom scrollbar */
::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}
::-webkit-scrollbar-track {
    background: var(--scrollbar-track);
}
::-webkit-scrollbar-thumb {
    background: var(--scrollbar-thumb);
    border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
    background: var(--scrollbar-thumb-hover);
}

/* Hide scrollbar only on dashboard routes for mobile while preserving scroll */
@media (max-width: 767px) {
    html.dashboard-mobile-scrollbar-hidden,
    body.dashboard-mobile-scrollbar-hidden {
        -ms-overflow-style: none;
        scrollbar-width: none;
    }

    html.dashboard-mobile-scrollbar-hidden::-webkit-scrollbar,
    body.dashboard-mobile-scrollbar-hidden::-webkit-scrollbar {
        display: none;
        width: 0;
        height: 0;
        background: transparent;
    }
}

/* Prevent pull-to-refresh on touch devices without breaking desktop wheel scroll chaining */
@media (pointer: coarse) {
    body {
        overscroll-behavior-y: contain;
    }
}

/* Prevent horizontal viewport panning on mobile across all pages */
html, body {
    max-width: 100%;
    overflow-x: hidden;
}

/* Safe area for notched phones */
.safe-area-top {
    padding-top: env(safe-area-inset-top);
}
.safe-area-bottom {
    padding-bottom: env(safe-area-inset-bottom);
}

/* Modal backdrop */
.modal-backdrop {
    background: var(--modal-backdrop);
    backdrop-filter: blur(4px);
    overflow-x: hidden;
    overscroll-behavior: contain;
    touch-action: manipulation;
}

/* Keep popup panels locked horizontally on mobile (no side-to-side panning). */
.modal-backdrop > div {
    max-width: 100%;
    overflow-x: hidden;
    overscroll-behavior-x: contain;
}

.modal-backdrop .overflow-y-auto {
    overflow-x: hidden;
    overscroll-behavior-x: contain;
}

/* App splash overlay (launch/resume) */
.app-splash {
    position: fixed;
    inset: 0;
    z-index: 120;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 1.5rem;
    background:
        radial-gradient(circle at 18% 15%, rgba(var(--accent-rgb), 0.18), transparent 42%),
        radial-gradient(circle at 82% 12%, rgba(var(--accent-rgb), 0.12), transparent 38%),
        linear-gradient(160deg, #09090b 0%, #111216 100%);
    color: var(--foreground);
    opacity: 1;
    visibility: visible;
    pointer-events: auto;
    transition: opacity 180ms ease, visibility 180ms ease;
}

.light .app-splash {
    background:
        radial-gradient(circle at 18% 15%, rgba(var(--accent-rgb), 0.14), transparent 42%),
        radial-gradient(circle at 82% 12%, rgba(var(--accent-rgb), 0.1), transparent 38%),
        linear-gradient(160deg, #f8fafc 0%, #eef2f7 100%);
}

.app-splash.is-hidden {
    opacity: 0;
    visibility: hidden;
    pointer-events: none;
}

.app-splash-card {
    width: min(100%, 21rem);
    border: 1px solid rgba(var(--accent-rgb), 0.24);
    background: rgba(9, 9, 11, 0.72);
    backdrop-filter: blur(8px);
    border-radius: 1.25rem;
    padding: 1.25rem 1rem;
    text-align: center;
    box-shadow: 0 20px 50px rgba(0, 0, 0, 0.28);
}

.light .app-splash-card {
    background: rgba(255, 255, 255, 0.78);
    box-shadow: 0 12px 36px rgba(15, 23, 42, 0.14);
}

.app-splash-loader {
    width: 3.65rem;
    height: 3.65rem;
    margin: 0 auto 0.75rem;
    position: relative;
    color: var(--accent);
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    padding: 0.6rem 0.48rem 0.35rem;
    overflow: hidden;
}

.app-splash-loader::before {
    content: "";
    position: absolute;
    left: 0.35rem;
    right: 0.35rem;
    top: 0.36rem;
    height: 2px;
    border-radius: 9999px;
    background: rgba(var(--accent-rgb), 0.36);
}

.app-splash-title {
    font-size: 1.05rem;
    font-weight: 700;
    margin: 0;
    letter-spacing: 0.01em;
}

.app-splash-meta {
    margin-top: 0.55rem;
    display: inline-flex;
    align-items: center;
    font-size: 0.8rem;
    color: var(--muted-foreground);
}

.app-splash-dot {
    width: 0.56rem;
    height: 0.56rem;
    border-radius: 9999px;
    background: rgba(var(--accent-rgb), 0.96);
    box-shadow:
        0 0 0 1px rgba(var(--accent-rgb), 0.24),
        0 6px 16px rgba(var(--accent-rgb), 0.22);
    transform: translateY(0) scale(0.86);
    opacity: 0.22;
    animation: appSplashDotDrip 1.28s cubic-bezier(0.37, 0.06, 0.32, 1) infinite;
}

.app-splash-dot:nth-child(2) {
    animation-delay: 0.16s;
}

.app-splash-dot:nth-child(3) {
    animation-delay: 0.32s;
}

.app-splash-dot:nth-child(4) {
    animation-delay: 0.48s;
}

@keyframes appSplashDotDrip {
    0%,
    18% {
        opacity: 0.2;
        transform: translateY(0) scale(0.86);
    }
    32% {
        opacity: 1;
        transform: translateY(2px) scale(1);
    }
    72% {
        opacity: 0.9;
        transform: translateY(20px) scale(0.94);
    }
    100% {
        opacity: 0;
        transform: translateY(30px) scale(0.72);
    }
}

@media (prefers-reduced-motion: reduce) {
    .app-splash,
    .app-splash-dot {
        transition: none;
        animation: none;
    }

    .app-splash-dot {
        opacity: 0.85;
        transform: translateY(12px) scale(0.82);
    }
}

/* Calendar dot - filled (completed doses) */
.dose-dot {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    display: block;
}

/* Calendar dot - outlined (upcoming/due doses) */
.dose-dot-upcoming {
    width: 6px;
    height: 6px;
    border-radius: 50%;
    background: transparent;
    border: 1.5px solid;
    display: block;
}

.svg-defs-hidden {
    position: absolute;
    overflow: hidden;
}

.tools-folder-menu {
    inset-inline-start: 50%;
    inset-inline-end: auto;
    left: 50% !important;
    right: auto !important;
    width: min(24rem, calc(100% - 2rem));
    transform: translateX(-50%) !important;
    bottom: calc(env(safe-area-inset-bottom, 0px) + 6.5rem);
    transform-origin: center bottom;
}

.tools-folder-menu.animate-scale-in {
    animation: toolsFolderMenuIn 0.3s ease-out forwards;
}

@keyframes toolsFolderMenuIn {
    from {
        opacity: 0;
        transform: translateX(-50%) scale(0.95);
    }
    to {
        opacity: 1;
        transform: translateX(-50%) scale(1);
    }
}

.dashboard-bottom-nav {
    position: fixed;
    left: 50%;
    width: min(56rem, calc(100% - 2rem));
    bottom: calc(env(safe-area-inset-bottom, 0px) + 1.5rem);
    transform: translateX(-50%) translateZ(0);
    -webkit-transform: translateX(-50%) translateZ(0);
    will-change: transform;
}

@supports (bottom: max(0px)) {
    .dashboard-bottom-nav {
        bottom: max(1.5rem, calc(env(safe-area-inset-bottom, 0px) + 0.75rem));
    }
}

.chart-h-180 {
    height: 180px;
}

.chart-h-200 {
    height: 200px;
}

.chart-h-280 {
    height: 280px;
}

.chart-h-320 {
    height: 320px;
}

.chip-accent {
    background-color: rgba(var(--accent-rgb), 0.12);
    color: rgb(var(--accent-rgb));
    border: 1px solid rgba(var(--accent-rgb), 0.35);
}

/* Tap highlight removal */
* {
    -webkit-tap-highlight-color: transparent;
}

/* Touch manipulation - faster touch response */
.touch-manipulation {
    touch-action: manipulation;
}

/* Input styling for iOS */
input, select, textarea {
    font-size: 16px !important;
}

/* Smooth theme transition */
body, .bg-background, .bg-card, .bg-secondary, .text-foreground {
    transition: background-color 0.2s ease, color 0.2s ease;
}

/* Enhanced shadcn-style button classes */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-sizing: border-box;
    border-radius: 0.375rem;
    font-size: 0.875rem;
    font-weight: 500;
    line-height: 1.2;
    padding: 0.5rem 1rem;
    min-height: 2.5rem;
    transition: all 0.15s ease;
    cursor: pointer;
    border: none;
    outline: none;
}
.btn:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}
.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

.btn-primary {
    background-color: var(--primary);
    color: var(--primary-foreground);
}
.btn-primary:hover:not(:disabled) {
    opacity: 0.9;
}

.btn-secondary {
    background-color: var(--secondary);
    color: var(--foreground);
}
.btn-secondary:hover:not(:disabled) {
    background-color: var(--muted);
}

.light .btn-secondary {
    background-color: #eef2f6;
}

.light .btn-secondary:hover:not(:disabled) {
    background-color: #e2e8f0;
}

.btn-destructive {
    background-color: var(--destructive);
    color: #fafafa;
}
.btn-destructive:hover:not(:disabled) {
    opacity: 0.9;
}

.btn-ghost {
    background-color: transparent;
    color: var(--foreground);
}
.btn-ghost:hover:not(:disabled) {
    background-color: var(--secondary);
}

.btn-outline {
    background-color: transparent;
    border: 1px solid var(--border);
    color: var(--foreground);
}
.btn-outline:hover:not(:disabled) {
    background-color: var(--secondary);
}

.light .btn-outline {
    background-color: #ffffff;
    border-color: var(--border);
}

.light .btn-outline:hover:not(:disabled) {
    background-color: #f8fafc;
}

/* User-customizable accent utilities */
.text-green-400,
.text-green-500 {
    color: var(--accent) !important;
}

.bg-green-500,
.bg-green-600 {
    background-color: var(--accent) !important;
}

.bg-green-700,
.bg-green-800 {
    background-color: var(--accent-dark) !important;
}

.hover\:bg-green-700:hover {
    background-color: var(--accent-dark) !important;
}

.active\:bg-green-800:active {
    background-color: var(--accent-darker) !important;
}

.border-green-500\/30,
.border-green-500\/50,
.border-green-500\/70 {
    border-color: rgba(var(--accent-rgb), 0.45) !important;
}

.bg-green-500\/10 {
    background-color: rgba(var(--accent-rgb), 0.10) !important;
}

.bg-green-500\/20 {
    background-color: rgba(var(--accent-rgb), 0.20) !important;
}

/* Button sizes */
.btn-sm {
    padding: 0.25rem 0.75rem;
    font-size: 0.75rem;
    min-height: 2.25rem;
}
.btn-lg {
    padding: 0.75rem 1.5rem;
    font-size: 1rem;
}
.btn-cta {
    padding: 0.625rem 1.125rem;
    font-size: 0.875rem;
    min-height: 2.75rem;
}
.btn-icon {
    padding: 0.625rem;
    width: 2.75rem;
    height: 2.75rem;
}

/* Mobile tap targets */
@media (max-width: 640px) {
    .btn {
        min-height: 44px;
        padding: 0.625rem 1rem;
    }

    .btn-sm {
        min-height: 44px;
        padding: 0.5rem 0.875rem;
        font-size: 0.8125rem;
    }

    .btn-cta {
        min-height: 44px;
        padding: 0.5625rem 0.9375rem;
        font-size: 0.875rem;
    }

    .btn-icon {
        width: 2.75rem;
        height: 2.75rem;
        padding: 0.625rem;
    }

    .btn-gradient {
        min-height: 44px;
        padding: 0.625rem 0.875rem;
    }

    .day-btn {
        min-width: 44px;
        min-height: 44px;
        width: 2.75rem;
        height: 2.75rem;
    }
}

/* ============================================================
   Animations
   ============================================================ */

/* Fade in */
@keyframes fadeIn {
    from {
        opacity: 0;
    }
    to {
        opacity: 1;
    }
}

.animate-fade-in {
    animation: fadeIn 0.5s ease-out forwards;
}

/* Fade in up */
@keyframes fadeInUp {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in-up {
    animation: fadeInUp 0.6s ease-out forwards;
}

/* Fade in down */
@keyframes fadeInDown {
    from {
        opacity: 0;
        transform: translateY(-20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.animate-fade-in-down {
    animation: fadeInDown 0.6s ease-out forwards;
}

/* Scale in */
@keyframes scaleIn {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.animate-scale-in {
    animation: scaleIn 0.3s ease-out forwards;
}

/* Staggered animation delays */
.animate-delay-100 { animation-delay: 0.1s; opacity: 0; }
.animate-delay-200 { animation-delay: 0.2s; opacity: 0; }
.animate-delay-300 { animation-delay: 0.3s; opacity: 0; }
.animate-delay-400 { animation-delay: 0.4s; opacity: 0; }
.animate-delay-500 { animation-delay: 0.5s; opacity: 0; }
.animate-delay-600 { animation-delay: 0.6s; opacity: 0; }

/* Pulse animation for CTAs */
@keyframes pulse {
    0%, 100% {
        transform: scale(1);
    }
    50% {
        transform: scale(1.02);
    }
}

.animate-pulse-subtle {
    animation: pulse 2s ease-in-out infinite;
}

/* Float animation */
@keyframes float {
    0%, 100% {
        transform: translateY(0);
    }
    50% {
        transform: translateY(-10px);
    }
}

.animate-float {
    animation: float 3s ease-in-out infinite;
}

/* Slide in from left */
@keyframes slideInLeft {
    from {
        opacity: 0;
        transform: translateX(-30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.animate-slide-in-left {
    animation: slideInLeft 0.5s ease-out forwards;
}

/* Slide in from right */
@keyframes slideInRight {
    from {
        opacity: 0;
        transform: translateX(30px);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

.animate-slide-in-right {
    animation: slideInRight 0.5s ease-out forwards;
}

/* Modal animations */
.modal-backdrop {
    animation: fadeIn 0.2s ease-out;
}

.modal-backdrop > div > div {
    animation: scaleIn 0.2s ease-out;
}

/* Hover lift effect */
.hover-lift {
    transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.hover-lift:hover {
    transform: translateY(-4px);
    box-shadow: 0 10px 20px rgba(0, 0, 0, 0.2);
}

.light .hover-lift:hover {
    box-shadow: 0 10px 24px rgba(15, 23, 42, 0.08);
}

/* Gradient text */
.gradient-text {
    color: var(--accent);
}

/* Gradient icon (for SVG stroke icons) */
.gradient-icon {
    stroke: url(#icon-gradient);
}

/* Brand syringe icon follows user-selected accent color */
.brand-accent {
    color: var(--accent);
}

/* Calculator page */
.calculator-page .calculator-syringe-wrap {
    width: 300px;
    margin: 0 auto;
}

.calculator-page .syringe-svg {
    display: block;
    margin: 0 auto;
}

.calculator-page .calc-input-shell {
    transition: border-color 0.15s ease, box-shadow 0.15s ease, background-color 0.15s ease;
}

.calculator-page .calc-input-shell:focus-within {
    border-color: var(--primary);
    box-shadow: 0 0 0 2px rgba(var(--accent-rgb), 0.2);
}

.calculator-page .calc-number-input {
    color: var(--foreground);
    -webkit-appearance: none;
    appearance: none;
}

.calculator-page .calc-number-input.is-prefill {
    color: var(--muted-foreground);
}

.dark .calculator-page .calc-input-shell {
    background-color: #18181b;
    border-color: #3f3f46;
}

.dark .calculator-page .calc-unit-pill {
    background-color: #18181b;
    border-left-color: #3f3f46;
}

.dark .calculator-page .calc-number-input {
    color: #fafafa;
    -webkit-text-fill-color: #fafafa;
    caret-color: var(--accent);
    background-color: #18181b !important;
    color-scheme: dark;
}

.dark .calculator-page .calc-number-input.is-prefill {
    color: #a1a1aa;
    -webkit-text-fill-color: #a1a1aa;
    color: var(--muted-foreground);
    -webkit-text-fill-color: var(--muted-foreground);
}

.dark .calculator-page .calc-number-input::placeholder {
    color: var(--muted-foreground);
}

.dark .calculator-page .calc-number-input:-webkit-autofill,
.dark .calculator-page .calc-number-input:-webkit-autofill:hover,
.dark .calculator-page .calc-number-input:-webkit-autofill:focus {
    -webkit-text-fill-color: #fafafa;
    -webkit-box-shadow: 0 0 0px 1000px #18181b inset;
    box-shadow: 0 0 0px 1000px #18181b inset;
    border: 0;
}

.calculator-page .syringe-liquid-transition {
    transition: width 0.5s cubic-bezier(0.4, 0, 0.2, 1), x 0.5s cubic-bezier(0.4, 0, 0.2, 1);
    animation: calculator-liquid-pulse 2s ease-in-out infinite;
}

@keyframes calculator-liquid-pulse {
    0%, 100% { opacity: 0.9; }
    50% { opacity: 1; }
}

.calculator-page .quick-select-btn {
    transition: all 0.15s ease;
}

.calculator-page .quick-select-btn:active {
    transform: scale(0.95);
}

.weight-tracker-page .quick-select-btn {
    transition: all 0.15s ease;
}

.weight-tracker-page .quick-select-btn:active {
    transform: scale(0.95);
}

@media (max-width: 640px) {
    .calculator-page .quick-select-btn {
        min-height: 44px;
        padding: 0.5rem 0.625rem;
    }

    .weight-tracker-page .quick-select-btn {
        min-height: 44px;
        padding: 0.5rem 0.625rem;
    }
}

.calculator-page #copy-volume-btn:hover,
.calculator-page #copy-tick-btn:hover {
    background-color: rgba(var(--accent-rgb), 0.05);
}

.calculator-page #result-concentration,
.calculator-page #result-volume,
.calculator-page #result-tick {
    transition: all 0.3s ease;
}

.calculator-page .results-error {
    background-color: rgba(239, 68, 68, 0.05) !important;
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.calculator-page .text-error {
    color: #ef4444 !important;
    opacity: 0.6;
}

.calculator-page #dose-warning {
    transition: all 0.3s ease;
}

.calculator-page #dose-warning.hidden {
    display: none;
}

.calculator-page .custom-dropdown {
    position: relative;
    border-left: 1px solid var(--border);
}

.calculator-page .custom-dropdown-trigger {
    display: flex;
    align-items: center;
    gap: 0.5rem;
    padding: 0.875rem 0.75rem;
    background: transparent;
    border: none;
    color: var(--muted-foreground);
    font-size: 0.875rem;
    cursor: pointer;
    transition: all 0.15s ease;
    min-width: 4rem;
    justify-content: space-between;
}

.calculator-page .custom-dropdown-trigger:hover {
    color: var(--foreground);
    background-color: var(--card-hover);
}

.calculator-page .custom-dropdown-arrow {
    width: 1rem;
    height: 1rem;
    transition: transform 0.2s ease;
}

.calculator-page .custom-dropdown-menu.open + .custom-dropdown-trigger .custom-dropdown-arrow,
.calculator-page .custom-dropdown-menu.open ~ .custom-dropdown-trigger .custom-dropdown-arrow,
.calculator-page .custom-dropdown:has(.custom-dropdown-menu.open) .custom-dropdown-arrow {
    transform: rotate(180deg);
}

.calculator-page .custom-dropdown-menu {
    position: absolute;
    top: calc(100% + 4px);
    right: 0;
    min-width: 100%;
    background-color: var(--card);
    border: 1px solid var(--border);
    border-radius: 0.75rem;
    box-shadow: 0 10px 15px -3px rgba(0, 0, 0, 0.3), 0 4px 6px -4px rgba(0, 0, 0, 0.2);
    z-index: 100;
    opacity: 0;
    visibility: hidden;
    transform: translateY(-8px);
    transition: all 0.15s ease;
    overflow: hidden;
}

.calculator-page .custom-dropdown-menu.open {
    opacity: 1;
    visibility: visible;
    transform: translateY(0);
}

.calculator-page .custom-dropdown-item {
    padding: 0.625rem 0.875rem;
    font-size: 0.875rem;
    color: var(--muted-foreground);
    cursor: pointer;
    transition: all 0.15s ease;
    white-space: nowrap;
}

.calculator-page .custom-dropdown-item:hover {
    background-color: var(--secondary);
    color: var(--foreground);
}

.calculator-page .custom-dropdown-item.active {
    background-color: rgba(var(--accent-rgb), 0.15);
    color: var(--accent);
}

.calculator-page .custom-dropdown-item:first-child {
    border-radius: 0.75rem 0.75rem 0 0;
}

.calculator-page .custom-dropdown-item:last-child {
    border-radius: 0 0 0.75rem 0.75rem;
}

/* Gradient button */
.btn-gradient {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    min-height: 2.75rem;
    border-radius: 0.5rem;
    padding: 0.625rem 1rem;
    font-size: 0.875rem;
    font-weight: 500;
    background: var(--accent);
    color: white;
    transition: opacity 0.2s, transform 0.1s;
}

.btn-gradient:not(.btn) {
    border: none;
    cursor: pointer;
}

.btn-gradient:hover {
    opacity: 0.9;
}

.btn-gradient:active {
    opacity: 0.8;
    transform: scale(0.98);
}

/* Typing cursor animation */
.typing-cursor {
    display: inline-block;
    color: var(--accent);
    animation: blink 1s step-end infinite;
    margin-left: 2px;
}

@keyframes blink {
    0%, 100% { opacity: 1; }
    50% { opacity: 0; }
}

/* Gradient border */
.gradient-border {
    position: relative;
}

.gradient-border::before {
    content: '';
    position: absolute;
    inset: 0;
    border-radius: inherit;
    padding: 2px;
    background: var(--accent);
    -webkit-mask: linear-gradient(#fff 0 0) content-box, linear-gradient(#fff 0 0);
    -webkit-mask-composite: xor;
    mask-composite: exclude;
}

/* Button loading state */
.btn-loading {
    position: relative;
    color: transparent !important;
    pointer-events: none;
}

.btn-loading::after {
    content: '';
    position: absolute;
    width: 1rem;
    height: 1rem;
    top: 50%;
    left: 50%;
    margin-left: -0.5rem;
    margin-top: -0.5rem;
    border: 2px solid currentColor;
    border-right-color: transparent;
    border-radius: 50%;
    animation: spin 0.75s linear infinite;
}

.dark .btn-loading.btn-primary::after {
    border-color: var(--primary-foreground);
    border-right-color: transparent;
}

.light .btn-loading.btn-primary::after {
    border-color: var(--primary-foreground);
    border-right-color: transparent;
}

@keyframes spin {
    to {
        transform: rotate(360deg);
    }
}

/* Loading overlay */
.loading-overlay {
    position: absolute;
    inset: 0;
    background: var(--background);
    opacity: 0.8;
    display: flex;
    align-items: center;
    justify-content: center;
    z-index: 10;
}

/* Spinner */
.spinner {
    width: 2rem;
    height: 2rem;
    border: 3px solid var(--muted);
    border-top-color: var(--primary);
    border-radius: 50%;
    animation: spin 0.75s linear infinite;
}

.spinner-sm {
    width: 1rem;
    height: 1rem;
    border-width: 2px;
}

.spinner-lg {
    width: 3rem;
    height: 3rem;
    border-width: 4px;
}

/* ============================================================
   Accessibility
   ============================================================ */

/* Skip link for screen readers */
.skip-link {
    position: absolute;
    top: -40px;
    left: 0;
    background: var(--primary);
    color: var(--primary-foreground);
    padding: 0.5rem 1rem;
    z-index: 100;
    transition: top 0.2s;
}

.skip-link:focus {
    top: 0;
}

/* Focus visible ring */
.focus-ring:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Reduced motion */
@media (prefers-reduced-motion: reduce) {
    *,
    *::before,
    *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}

/* Screen reader only */
.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;
}

/* ============================================================
   Confirmation Dialog
   ============================================================ */

.confirm-dialog {
    max-width: 400px;
    width: 90%;
}

.confirm-dialog-destructive .confirm-btn {
    background-color: #dc2626;
    color: white;
}

.confirm-dialog-destructive .confirm-btn:hover {
    background-color: #b91c1c;
}

/* ============================================================
   Info Tooltips
   ============================================================ */

.info-tooltip {
    position: relative;
    display: inline-flex;
    align-items: center;
    justify-content: center;
    width: 16px;
    height: 16px;
    border-radius: 50%;
    background: var(--muted);
    color: var(--muted-foreground);
    font-size: 10px;
    font-weight: 600;
    cursor: pointer;
    margin-left: 4px;
    flex-shrink: 0;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
}

.info-tooltip:hover,
.info-tooltip:focus,
.info-tooltip.active {
    background: var(--primary);
    color: var(--primary-foreground);
}

.info-tooltip-content {
    position: absolute;
    bottom: calc(100% + 8px);
    left: 50%;
    transform: translateX(-50%);
    background: var(--card);
    border: 1px solid var(--border);
    border-radius: 8px;
    padding: 8px 12px;
    font-size: 12px;
    font-weight: 400;
    color: var(--foreground);
    white-space: normal;
    width: max-content;
    max-width: 200px;
    text-align: left;
    z-index: 100;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.3);
    opacity: 0;
    visibility: hidden;
    transition: opacity 0.15s ease, visibility 0.15s ease;
    pointer-events: none;
}

.info-tooltip-content::after {
    content: '';
    position: absolute;
    top: 100%;
    left: 50%;
    transform: translateX(-50%);
    border: 6px solid transparent;
    border-top-color: var(--border);
}

.info-tooltip-content::before {
    content: '';
    position: absolute;
    top: calc(100% - 1px);
    left: 50%;
    transform: translateX(-50%);
    border: 5px solid transparent;
    border-top-color: var(--card);
    z-index: 1;
}

.info-tooltip.active .info-tooltip-content,
.info-tooltip:focus .info-tooltip-content {
    opacity: 1;
    visibility: visible;
}

/* Adjust tooltip position for edge cases */
.info-tooltip-content.tooltip-left {
    left: 0;
    transform: translateX(0);
}

.info-tooltip-content.tooltip-left::after,
.info-tooltip-content.tooltip-left::before {
    left: 12px;
}

.info-tooltip-content.tooltip-right {
    left: auto;
    right: 0;
    transform: translateX(0);
}

.info-tooltip-content.tooltip-right::after,
.info-tooltip-content.tooltip-right::before {
    left: auto;
    right: 12px;
}

/* ============================================================
   Number Pad
   ============================================================ */

/* ============================================================
   Layout Utilities
   ============================================================ */

.page-wrap {
    max-width: 40rem;
    margin: 0 auto;
    padding: 1.5rem 1rem 5rem;
}

.page-wrap-wide {
    max-width: 48rem;
}

@media (min-width: 1024px) {
    .page-wrap {
        max-width: 64rem;
    }
}
.page-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 0.5rem;
    margin-bottom: 1.5rem;
}

.page-header-group {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.page-header-actions {
    display: flex;
    align-items: center;
    gap: 0.5rem;
}

.calendar-card {
    width: 100%;
    max-width: 56rem;
    margin: 0 auto;
}

.section-wrap {
    width: 100%;
    max-width: 56rem;
    margin: 0 auto;
}

.form-error {
    display: flex;
    gap: 0.5rem;
    align-items: flex-start;
    border-radius: 0.75rem;
    padding: 0.75rem;
    border: 1px solid;
    font-size: 0.875rem;
}

.form-error.hidden {
    display: none;
}

#login-splash {
    transition: opacity 0.25s ease;
}

.calendar-day--today {
    background-color: var(--accent);
    color: #ffffff;
    font-weight: 700;
    box-shadow: 0 10px 18px rgba(var(--accent-rgb), 0.28);
}

.light .calendar-day--today {
    background-color: var(--accent-dark);
    color: #ffffff;
    box-shadow: 0 10px 18px rgba(var(--accent-rgb), 0.25);
}
.dark .form-error {
    background: rgba(239, 68, 68, 0.12);
    border-color: rgba(239, 68, 68, 0.35);
    color: #fecaca;
}

.light .form-error {
    background: rgba(239, 68, 68, 0.1);
    border-color: rgba(239, 68, 68, 0.35);
    color: #b91c1c;
}

/* ============================================================
   Toggle Switch
   ============================================================ */

.native-toggle-input,
.toggle-switch-input {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}

.toggle-switch-wrapper {
    position: relative;
    display: inline-flex;
    align-items: center;
    cursor: pointer;
}

.toggle-switch {
    position: relative;
    display: inline-flex;
    align-items: center;
    width: 2.75rem;
    height: 1.5rem;
    border-radius: 9999px;
    background-color: var(--muted);
    border: 1px solid var(--border);
    transition: background-color 0.2s ease, border-color 0.2s ease;
    cursor: pointer;
}

.toggle-switch[aria-pressed="true"] {
    background-color: var(--accent);
    border-color: var(--accent);
}

.toggle-switch-input:checked + .toggle-switch {
    background-color: var(--accent);
    border-color: var(--accent);
}

.toggle-switch-input:focus-visible + .toggle-switch {
    outline: 2px solid var(--accent);
    outline-offset: 2px;
}

.toggle-switch-input:disabled + .toggle-switch {
    opacity: 0.5;
    cursor: not-allowed;
}

.toggle-switch-knob {
    position: absolute;
    left: 2px;
    top: 2px;
    width: 1.125rem;
    height: 1.125rem;
    border-radius: 9999px;
    background-color: var(--foreground);
    box-shadow: 0 1px 3px rgba(0, 0, 0, 0.2);
    transition: transform 0.2s ease, background-color 0.2s ease;
}

.toggle-switch[aria-pressed="true"] .toggle-switch-knob {
    transform: translateX(1.25rem);
    background-color: white;
}

.toggle-switch-input:checked + .toggle-switch .toggle-switch-knob {
    transform: translateX(1.25rem);
    background-color: white;
}

/* ============================================================
   Number Pad
   ============================================================ */

.number-pad-btn {
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 56px;
    font-size: 1.25rem;
    font-weight: 500;
    background-color: var(--secondary);
    border: none;
    border-radius: 0.5rem;
    color: var(--foreground);
    cursor: pointer;
    touch-action: manipulation;
    -webkit-tap-highlight-color: transparent;
    transition: background-color 0.1s ease;
}

.number-pad-btn:hover {
    background-color: var(--card-hover);
}

.number-pad-btn:active {
    background-color: var(--muted);
    transform: scale(0.98);
}



.marketing-wrap {
    max-width: 64rem;
    margin: 0 auto;
    padding: 0 1rem;
}

.marketing-section {
    padding: 2.5rem 0;
}

@media (min-width: 768px) {
    .marketing-section {
        padding: 3.5rem 0;
    }
}

.marketing-section.marketing-section-landing {
    padding-top: 1.25rem;
}

@media (min-width: 768px) {
    .marketing-section.marketing-section-landing {
        padding-top: 1.75rem;
    }
}

.landing-top-shell {
    position: relative;
    isolation: isolate;
    overflow: hidden;
}

.landing-top-shell::before {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background-image: radial-gradient(circle at 1px 1px, rgba(34, 197, 94, 0.16) 1px, transparent 0);
    background-size: 26px 26px;
    background-position: 0 0;
    opacity: 0.45;
}

.landing-top-shell::after {
    content: "";
    position: absolute;
    inset: 0;
    z-index: 0;
    pointer-events: none;
    background: linear-gradient(to bottom, transparent 55%, var(--background) 100%);
}

.landing-top-shell > * {
    position: relative;
    z-index: 1;
}

html.light .landing-top-shell::before {
    background-image: radial-gradient(circle at 1px 1px, rgba(22, 163, 74, 0.22) 1px, transparent 0);
    opacity: 0.62;
}

.marketing-page-shell {
    position: relative;
    isolation: isolate;
}

.marketing-page-shell::before {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: clamp(300px, 44vw, 520px);
    z-index: 0;
    pointer-events: none;
    background-image:
        radial-gradient(circle at 1px 1px, rgba(34, 197, 94, 0.16) 1px, transparent 0),
        linear-gradient(120deg, rgba(34, 197, 94, 0.06), rgba(14, 165, 233, 0.04));
    background-size: 26px 26px, 100% 100%;
    background-position: 0 0, 0 0;
    opacity: 0.55;
}

.marketing-page-shell::after {
    content: "";
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    height: clamp(300px, 44vw, 520px);
    z-index: 0;
    pointer-events: none;
    background: linear-gradient(to bottom, transparent 62%, var(--background) 100%);
}

.marketing-page-shell > :not(.modal-backdrop) {
    position: relative;
    z-index: 1;
}

html.light .marketing-page-shell::before {
    background-image:
        radial-gradient(circle at 1px 1px, rgba(22, 163, 74, 0.2) 1px, transparent 0),
        linear-gradient(120deg, rgba(22, 163, 74, 0.08), rgba(14, 165, 233, 0.06));
    opacity: 0.74;
}


.marketing-hero-title {
    font-size: 2.25rem;
    line-height: 1.2;
    font-weight: 700;
    letter-spacing: -0.02em;
}

@media (min-width: 768px) {
    .marketing-hero-title {
        font-size: 2.75rem;
    }
}

.marketing-hero-subtitle {
    font-size: 1.125rem;
    color: var(--muted-foreground);
    max-width: 48rem;
    margin: 0 auto;
}


.field-error {
    font-size: 0.75rem;
    color: #f87171;
    margin-top: 0.25rem;
}

.light .field-error {
    color: #dc2626;
}

.advanced-toggle summary::-webkit-details-marker {
    display: none;
}

.advanced-toggle[open] .advanced-chevron {
    transform: rotate(180deg);
}