/* ===================================================================
   Epopt — Design Tokens & Global Styles
   All component stylesheets reference these tokens by name.
   Never hard-code raw color, spacing, or typography values.
   =================================================================== */

:root {
    /* --- Color Palette --- */
    --color-primary: hsl(215, 100%, 50%);
    --color-primary-hover: hsl(215, 100%, 40%);
    --color-primary-light: hsl(215, 100%, 95%);
    --color-danger: hsl(0, 75%, 55%);
    --color-danger-hover: hsl(0, 75%, 45%);
    --color-danger-light: hsl(0, 75%, 95%);
    --color-warning: hsl(40, 95%, 50%);
    --color-warning-light: hsl(40, 95%, 92%);
    --color-success: hsl(145, 65%, 42%);
    --color-success-light: hsl(145, 65%, 92%);

    /* --- Domain Colors --- */
    --color-income: hsl(145, 65%, 42%);
    --color-income-light: hsl(145, 65%, 92%);
    --color-expense: hsl(0, 75%, 55%);
    --color-expense-light: hsl(0, 75%, 95%);
    --color-transfer: hsl(215, 100%, 50%);
    --color-transfer-light: hsl(215, 100%, 95%);
    --color-envelope-best: hsl(145, 65%, 42%);
    --color-envelope-worst: hsl(0, 75%, 55%);
    --color-envelope-expected: hsl(215, 100%, 50%);

    /* --- Surfaces --- */
    --color-surface: hsl(0, 0%, 100%);
    --color-surface-alt: hsl(220, 20%, 97%);
    --color-surface-hover: hsl(220, 20%, 94%);
    --color-border: hsl(220, 15%, 85%);
    --color-border-light: hsl(220, 15%, 92%);

    /* --- Text --- */
    --color-text: hsl(220, 25%, 15%);
    --color-text-secondary: hsl(220, 15%, 45%);
    --color-text-muted: hsl(220, 10%, 65%);
    --color-text-inverse: hsl(0, 0%, 100%);

    /* --- Overlays --- */
    --color-backdrop: hsla(220, 25%, 15%, 0.5);

    /* --- Spacing Scale --- */
    --spacing-2xs: 0.125rem;
    --spacing-xs: 0.25rem;
    --spacing-sm: 0.5rem;
    --spacing-md: 1rem;
    --spacing-lg: 1.5rem;
    --spacing-xl: 2rem;
    --spacing-2xl: 3rem;

    /* --- Typography --- */
    --font-family: 'Segoe UI', -apple-system, BlinkMacSystemFont, Roboto, 'Helvetica Neue', sans-serif;
    --font-family-mono: 'Cascadia Code', 'Fira Code', Consolas, monospace;
    --font-size-2xs: 0.625rem;
    --font-size-xs: 0.75rem;
    --font-size-sm: 0.875rem;
    --font-size-md: 1rem;
    --font-size-lg: 1.25rem;
    --font-size-xl: 1.5rem;
    --font-size-2xl: 2rem;
    --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-relaxed: 1.75;
    --letter-spacing-wide: 0.05em;

    /* --- Border Radius --- */
    --radius-sm: 0.25rem;
    --radius-md: 0.5rem;
    --radius-lg: 0.75rem;
    --radius-full: 9999px;

    /* --- Shadows --- */
    --shadow-sm: 0 1px 2px hsla(220, 25%, 15%, 0.06);
    --shadow-md: 0 2px 8px hsla(220, 25%, 15%, 0.1);
    --shadow-lg: 0 4px 16px hsla(220, 25%, 15%, 0.12);

    /* --- Transitions --- */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;

    /* --- Layout --- */
    --nav-width: 250px;
    --nav-width-collapsed: 56px;
    --content-max-width: 1200px;
    --content-max-width-wide: 87.5rem;  /* 1400px */
    --card-stat-col-min: 5.625rem;
    --tabbar-height: 3.5rem;
    --z-tabbar: 50;
    --fab-size: 3.5rem;
    --tap-target-min: 44px;
    --safe-area-top: env(safe-area-inset-top, 0px);
    --safe-area-right: env(safe-area-inset-right, 0px);
    --safe-area-bottom: env(safe-area-inset-bottom, 0px);
    --safe-area-left: env(safe-area-inset-left, 0px);
    --shell-safe-area-top: var(--safe-area-top);

    /* --- Control / Input Sizing --- */
    --control-width-xs: 4.375rem;  /* 70px */
    --control-width-sm: 5rem;      /* 80px */
    --control-width-md: 6.25rem;   /* 100px */
    --control-width-lg: 7.5rem;    /* 120px */
    --control-width-xl: 8.75rem;   /* 140px */
    --control-width-2xl: 10rem;    /* 160px */

    /* --- Grid Track Minimums (minmax(N, 1fr)) --- */
    --grid-col-min-sm: 6.25rem;    /* 100px */
    --grid-col-min-md: 17.5rem;    /* 280px */
    --grid-col-min-lg: 25rem;      /* 400px */

    /* --- Component Geometry --- */
    --modal-width: 31.25rem;       /* 500px */
    --table-min-width: 30rem;      /* 480px */
    --table-max-height: 70vh;      /* sticky-header scroll region cap */
    --icon-chevron: 0.5rem;        /* small chevron/caret box */
    --swatch-width: 0.75rem;       /* 12px chart legend swatch */
    --swatch-height: 0.1875rem;    /* 3px chart legend swatch */

    color-scheme: light;
}

/* --- Dark Mode --- */
[data-theme="dark"] {
    --color-primary: hsl(215, 90%, 60%);
    --color-primary-hover: hsl(215, 90%, 50%);
    --color-primary-light: hsl(215, 50%, 20%);
    --color-danger: hsl(0, 70%, 60%);
    --color-danger-hover: hsl(0, 70%, 50%);
    --color-danger-light: hsl(0, 40%, 20%);
    --color-warning: hsl(40, 90%, 55%);
    --color-warning-light: hsl(40, 40%, 20%);
    --color-success: hsl(145, 55%, 50%);
    --color-success-light: hsl(145, 30%, 20%);

    --color-income: hsl(145, 55%, 50%);
    --color-income-light: hsl(145, 30%, 20%);
    --color-expense: hsl(0, 70%, 60%);
    --color-expense-light: hsl(0, 40%, 20%);
    --color-transfer: hsl(215, 90%, 60%);
    --color-transfer-light: hsl(215, 50%, 20%);

    --color-surface: hsl(220, 20%, 12%);
    --color-surface-alt: hsl(220, 20%, 15%);
    --color-surface-hover: hsl(220, 20%, 20%);
    --color-border: hsl(220, 15%, 28%);
    --color-border-light: hsl(220, 15%, 22%);

    --color-text: hsl(220, 15%, 90%);
    --color-text-secondary: hsl(220, 10%, 65%);
    --color-text-muted: hsl(220, 8%, 50%);
    --color-text-inverse: hsl(0, 0%, 100%);

    --color-backdrop: hsla(0, 0%, 0%, 0.6);

    --shadow-sm: 0 1px 2px hsla(0, 0%, 0%, 0.2);
    --shadow-md: 0 2px 8px hsla(0, 0%, 0%, 0.3);
    --shadow-lg: 0 4px 16px hsla(0, 0%, 0%, 0.4);
}

/* --- CSS Reset & Base --- */

*,
*::before,
*::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 100%;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: var(--font-family);
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-normal);
    line-height: var(--line-height-normal);
    color: var(--color-text);
    background-color: var(--color-surface);
    -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);
}

h1 { font-size: var(--font-size-2xl); }
h2 { font-size: var(--font-size-xl); }
h3 { font-size: var(--font-size-lg); }

a {
    color: var(--color-primary);
    text-decoration: none;
    transition: color var(--transition-fast);
    -webkit-user-select: none;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

a:hover {
    color: var(--color-primary-hover);
    text-decoration: underline;
}

button {
    font-family: inherit;
    font-size: inherit;
    cursor: pointer;
    border: none;
    background: none;
    /* iOS touch handling */
    -webkit-user-select: none;
    user-select: none;
    -webkit-tap-highlight-color: transparent;
    touch-action: manipulation;
}

input, select, textarea {
    font-family: inherit;
    font-size: inherit;
}

input::placeholder {
    font-style: italic;
    color: var(--color-text-muted);
}

/* --- Focus Styles (Accessibility) --- */

:focus-visible {
    outline: 2px solid var(--color-primary);
    outline-offset: 2px;
}

/* --- Utility Classes --- */

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

/* --- Shared Form Primitives --- */

.form-group {
    display: flex;
    flex-direction: column;
    gap: var(--spacing-xs);
}

.form-group label {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    color: var(--color-text-secondary);
}

.form-input {
    padding: var(--spacing-sm) var(--spacing-md);
    border: 1px solid var(--color-border);
    border-radius: var(--radius-md);
    font-size: var(--font-size-md);
    color: var(--color-text);
    background-color: var(--color-surface);
    transition: border-color var(--transition-fast);
}

.form-input:focus {
    border-color: var(--color-primary);
    outline: none;
    box-shadow: 0 0 0 2px var(--color-primary-light);
}

/* Sign-toggle wrapper for number inputs that accept negative values */
.input-with-sign {
    display: flex;
    align-items: stretch;
}

.input-with-sign .form-input {
    flex: 1;
    border-top-left-radius: 0;
    border-bottom-left-radius: 0;
}

.sign-toggle {
    padding: 0 var(--spacing-sm);
    min-width: 2.5rem;
    border: 1px solid var(--color-border);
    border-right: none;
    border-radius: var(--radius-md) 0 0 var(--radius-md);
    background-color: var(--color-surface-alt);
    color: var(--color-text-secondary);
    font-size: var(--font-size-md);
    font-weight: var(--font-weight-semibold);
    cursor: pointer;
    user-select: none;
    touch-action: manipulation;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background-color var(--transition-fast), color var(--transition-fast), border-color var(--transition-fast);
}

.sign-toggle:hover {
    background-color: var(--color-surface-hover);
}

.sign-toggle.is-negative {
    color: var(--color-danger);
    background-color: var(--color-danger-light);
    border-color: var(--color-danger);
}

.form-row {
    display: flex;
    gap: var(--spacing-md);
    flex-wrap: wrap;
}

.form-row .form-group {
    flex: 1;
}

.form-fieldset {
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-md);
    padding: var(--spacing-md);
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.form-fieldset legend {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    color: var(--color-text-secondary);
    padding: 0 var(--spacing-xs);
}

.form-check {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
}

.form-check label {
    font-size: var(--font-size-sm);
    color: var(--color-text-secondary);
    cursor: pointer;
}

.form-actions {
    display: flex;
    justify-content: flex-end;
    gap: var(--spacing-sm);
    margin-top: var(--spacing-sm);
}

.form-hint {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
}

/* --- Shared Card Primitives --- */
/* Balance value colors + the event-card row structure shared by EventCard
   (comfortable density) and TransferEventCard. Status variants (event-cleared,
   event-reserved, …) deliberately stay component-scoped: each card sets `border`
   on its isolated root selector, which out-specifies a global status class. */

.balance-positive {
    color: var(--color-income);
}

.balance-negative {
    color: var(--color-expense);
}

.balance-reserved {
    color: var(--color-warning);
}

.event-card-row {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    flex-wrap: nowrap;
    min-height: calc(var(--spacing-xl) + var(--spacing-sm));
    min-width: 0;
}

.event-card-info {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    flex: 1 1 140px;
    min-width: 0;
}

.event-card-name {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-semibold);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.event-card-stats {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    flex-shrink: 0;
}

.event-card-stat {
    display: flex;
    flex-direction: column;
    gap: 1px;
}

.event-card-label {
    display: none;
}

.event-card-value {
    font-size: var(--font-size-sm);
    font-weight: var(--font-weight-medium);
    font-variant-numeric: tabular-nums;
    white-space: nowrap;
}

.event-card-tags {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    flex-shrink: 0;
}

.event-card-tag {
    font-size: var(--font-size-xs);
    color: var(--color-text-muted);
    background: var(--color-surface-alt);
    border: 1px solid var(--color-border-light);
    border-radius: var(--radius-full);
    padding: 0 var(--spacing-xs);
    white-space: nowrap;
}

.event-card-actions {
    display: flex;
    gap: 0;
    flex-shrink: 0;
}

@media (max-width: 900px) {
    /* Wrap so stats flow onto new lines */
    .event-card-row {
        flex-wrap: wrap;
        gap: var(--spacing-xs) var(--spacing-sm);
        align-items: center;
    }

    .event-card-info {
        order: 1;
        flex: 1 1 0;
        min-width: 0;
    }

    .event-card-actions {
        order: 2;
        flex-shrink: 0;
    }

    /* Stats: full-width row below the name line.
       (TransferEventCard adds align-items: center in its own scoped mobile rule.) */
    .event-card-stats {
        order: 3;
        flex: 0 0 100%;
        display: grid;
        grid-template-columns: repeat(auto-fit, minmax(var(--card-stat-col-min), 1fr));
        gap: var(--spacing-sm);
        margin-top: var(--spacing-xs);
    }

    .event-card-label {
        display: block;
        font-size: var(--font-size-xs);
        color: var(--color-text-muted);
        text-transform: uppercase;
        letter-spacing: var(--letter-spacing-wide);
    }

    .event-card-value {
        font-size: var(--font-size-md);
        font-weight: var(--font-weight-semibold);
    }

    .event-card-tags {
        order: 4;
        flex: 0 0 100%;
        flex-wrap: wrap;
    }
}

/* --- Blazor Infrastructure --- */

#blazor-error-ui {
    background: var(--color-warning-light);
    color: var(--color-text);
    padding: var(--spacing-sm) var(--spacing-md);
    position: fixed;
    bottom: 0;
    left: 0;
    right: 0;
    z-index: 1000;
    display: none;
}

#blazor-error-ui .dismiss {
    cursor: pointer;
    position: absolute;
    right: var(--spacing-md);
    top: var(--spacing-sm);
}