/**
 * Vertico Brand Stylesheet v2.1
 *
 * ARCHITECTURAL OVERVIEW:
 * This stylesheet employs a modern, scalable, and conflict-free CSS strategy.
 *
 * 1.  **CSS Cascade Layers (@layer):** Organizes rules into distinct layers of specificity.
 *     This prevents style conflicts and makes the cascade predictable. The order is:
 *     `reset` -> `base` -> `layout` -> `components`.
 *
 * 2.  **Design Tokens:** All styling decisions (colors, fonts, spacing) are derived
 *     from CSS Custom Properties defined in the `:root` selector within the `base` layer.
 *     This ensures brand consistency and simplifies theming (e.g., dark mode).
 *
 * 3.  **BEM-like Naming:** Components use a `.c-component__element--modifier` naming
 *     convention for clear, scoped styling (e.g., `.c-btn--primary`).
 *
 * 4.  **Layout Utilities:** Layout-specific classes start with `.l-` (e.g., `.l-app`)
 *     to separate structural styles from component styles.
 */

 @layer reset, base, layout, components;

 /* ==========================================================================
    LAYER: RESET
    Establishes a clean, consistent baseline across all browsers.
    ========================================================================== */
 @layer reset {
    /* A modern, gentle reset for sensible defaults. */
    *, *::before, *::after { margin: 0; padding: 0; box-sizing: border-box; }
    /* Provides a clear, consistent focus indicator for accessibility. */
    :focus-visible { outline: var(--focus-outline-width) solid var(--focus-outline-color); outline-offset: var(--focus-outline-offset); }
    /* Respects user preference for reduced motion. */
    @media (prefers-reduced-motion: reduce) { *, *::before, *::after { animation: none !important; transition: none !important; } }
    /* Resets button styles for custom styling. */
    button { font: inherit; cursor: pointer; border: none; background: none; color: inherit; }
    a { color: var(--color-accent); text-decoration: none; }
    img, picture, video, canvas, svg { display: block; max-width: 100%; }
    input, button, textarea, select { font: inherit; }
 }
 
 /* ==========================================================================
    LAYER: BASE
    Defines the project's design tokens and global element styles.
    ========================================================================== */
 @layer base {
    /* --------------------------------------------------------------------------
    - Design Tokens (:root) - The Single Source of Truth for all styles.
    - These variables are synchronized with the canonical Vertico Brand Guide.
    -------------------------------------------------------------------------- */
    :root {
        /* Colors */
        --color-background: #ffffff;
        --color-surface: #f7f7f7;
        --color-text-primary: #333641;
        --color-text-secondary: slategrey;
        --color-text-on-accent: #ffffff;
        --color-accent: #1b97ff;
        --color-accent-dark: #007ae5;
        --color-border: #e5e4e2;
        --color-positive: #28a745;
        --color-negative: #dc3545;
        --color-negative-dark: #c82333;
        --color-warning: #ffc107;
        --color-positive-bg: #f0f9f4;
        --color-negative-bg: #fdf0f2;
        --color-warning-bg: #fff8e1;
        
        /* Typography */
        --font-family-primary: 'Manrope', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
        --font-weight-normal: 400;
        --font-weight-medium: 500;
        --font-weight-bold: 700;
        /* Using clamp() for fluid typography that scales with the viewport. */
        --font-size-h1: clamp(2.5rem, 5vw + 1rem, 4rem);
        --font-size-h2: clamp(1.75rem, 4vw + 1rem, 2.25rem);
        --font-size-h3: 1.5rem;
        --font-size-h4: 1.25rem;
        --font-size-p: 1.1rem;
        --font-size-label: 0.75rem;
        --letter-spacing-wide: 0.1em;
        --line-height-base: 1.6;
        --line-height-heading: 1.2;
 
        /* Spacing (using a consistent scale) */
        --space-xs: 0.25rem; --space-sm: 0.5rem; --space-md: 1rem; --space-lg: 1.5rem; --space-xl: 3rem; --space-xxl: 6rem;
        
        /* Borders & Effects */
        --border-radius: 4px;
        --border-width: 1px;
        --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
        --shadow-md: 0 4px 12px rgba(0,0,0,0.08);
 
        /* Layout & Transitions */
        --layout-sidebar-width: 260px;
        --transition-duration: 0.2s;
        --transition-easing: ease-in-out;
        --transition-duration-long: 0.3s;
        --focus-outline-width: 2px;
        --focus-outline-offset: 2px;
        --focus-outline-color: var(--color-accent);
    }
 
    /* Dark mode theme overrides. Applied when `data-theme="dark"` is on the <html> element. */
    [data-theme="dark"] {
        --color-background: #1c1c1e;
        --color-surface: #2c2c2e;
        --color-text-primary: #f2f2f7;
        --color-text-secondary: #8e8e93;
        --color-border: #3a3a3c;
        --color-accent: #2ab7ff;
        --color-accent-dark: #1b97ff;
        --shadow-sm: 0 2px 4px rgba(0,0,0,0.2);
        --shadow-md: 0 4px 12px rgba(0,0,0,0.25);
        --color-positive-bg: rgba(40, 167, 69, 0.15);
        --color-negative-bg: rgba(220, 53, 69, 0.15);
        --color-warning-bg: rgba(255, 193, 7, 0.15);
    }
 
    /* --------------------------------------------------------------------------
    - Global Styles
    -------------------------------------------------------------------------- */
    body { font-family: var(--font-family-primary); color: var(--color-text-primary); background-color: var(--color-surface); line-height: var(--line-height-base); min-height: 100vh; font-size: 1rem; -webkit-font-smoothing: antialiased; -moz-osx-font-smoothing: grayscale; transition: background-color var(--transition-duration) var(--transition-easing), color var(--transition-duration) var(--transition-easing); }
    /* A special class for the login screen to have a different background. */
    body.is-unauthenticated { background-color: var(--color-background); }
    a:hover { text-decoration: underline; }
    /* A utility class to visually hide elements while keeping them accessible to screen readers. */
    .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; }
    [aria-busy="true"] { cursor: progress; }
 }
 
 /* ==========================================================================
    LAYER: LAYOUT
    Defines the high-level page structure and container styles.
    ========================================================================== */
 @layer layout {
    .l-app { display: grid; grid-template-columns: 1fr; }
    /* `container-type` enables container queries for responsive components. */
    .l-app__content { padding: var(--space-lg); container-type: inline-size; }
    .l-view-header { display: flex; justify-content: space-between; align-items: center; margin-bottom: var(--space-xl); flex-wrap: wrap; gap: var(--space-md); }
    .l-view-header__title { font-size: var(--font-size-h2); font-weight: var(--font-weight-bold); }
 
    /* Layout specific to the authentication screen. */
    .l-auth-layout { display: grid; grid-template-columns: 1fr; min-height: 100vh; animation: fade-in 0.5s var(--transition-easing) forwards; }
    .l-auth-layout__form-panel { display: flex; flex-direction: column; align-items: center; justify-content: center; padding: var(--space-xl); }
    .l-auth-layout__brand-panel { background-color: var(--color-surface); display: flex; flex-direction: column; align-items: center; justify-content: center; padding: var(--space-xl); text-align: center; border-left: var(--border-width) solid var(--color-border); padding-bottom: 15vh; }
 }
 
 /* ==========================================================================
    LAYER: COMPONENTS
    Contains all reusable UI components, from simple buttons to complex tables.
    ========================================================================== */
 @layer components {
    /* --- Base Components --- */
    .c-btn { padding: var(--space-sm) var(--space-lg); border-radius: var(--border-radius); font-weight: var(--font-weight-bold); transition: background-color var(--transition-duration) var(--transition-easing); display: inline-flex; align-items: center; justify-content: center; gap: var(--space-xs); white-space: nowrap; position: relative; overflow: hidden; }
    .c-btn:disabled { opacity: 0.6; cursor: not-allowed; }
    .c-btn--primary { background-color: var(--color-accent); color: var(--color-text-on-accent); }
    .c-btn--primary:hover:not(:disabled) { background-color: var(--color-accent-dark); }
    .c-btn--secondary { background-color: var(--color-border); color: var(--color-text-primary); }
    /* `color-mix()` is a modern CSS feature for mixing colors directly in the browser. */
    .c-btn--secondary:hover:not(:disabled) { background-color: color-mix(in srgb, var(--color-border) 80%, var(--color-text-primary)); }
    .c-btn--danger { background-color: var(--color-negative); color: var(--color-text-on-accent); }
    .c-btn--danger:hover:not(:disabled) { background-color: var(--color-negative-dark); }
    .c-btn--link { color: var(--color-text-secondary); font-weight: var(--font-weight-medium); text-decoration: underline; text-underline-offset: 2px; background: none; border: none; padding: 0; cursor: pointer; transition: color var(--transition-duration) ease; font-size: 0.875rem; }
    .c-btn--link:hover { color: var(--color-accent); }
    /* Loading state: hide the text and show a CSS-only spinner. */
    .c-btn[data-loading="true"] { gap: var(--space-sm); }
    .c-btn[data-loading="true"] .c-btn__text { display: none; }
    .c-btn[data-loading="true"]::before { content: ''; width: 1.25rem; height: 1.25rem; border: 3px solid color-mix(in srgb, var(--color-text-on-accent) 30%, transparent); border-radius: 50%; border-top-color: var(--color-text-on-accent); animation: spin 1s linear infinite; }
    /* The loading text is pulled from the `data-loading-text` attribute. */
    .c-btn[data-loading="true"]::after { content: attr(data-loading-text); }
    .c-form-group { position: relative; text-align: left; margin-bottom: var(--space-lg); }
    .c-form-group__label { display: block; font-size: var(--font-size-label); font-weight: var(--font-weight-bold); text-transform: uppercase; letter-spacing: var(--letter-spacing-wide); margin-bottom: var(--space-sm); color: var(--color-text-secondary); transition: color var(--transition-duration) var(--transition-easing); }
    .c-form-group__input { width: 100%; padding: var(--space-xs) 0 var(--space-sm) 0; border-radius: 0; border: none; border-bottom: var(--border-width) solid var(--color-border); background-color: transparent; font-size: 1rem; color: var(--color-text-primary); transition: all var(--transition-duration) var(--transition-easing); }
    .c-form-group__input:focus-visible { border-bottom-color: var(--color-accent); box-shadow: none; outline: none; }
    .c-form-group--error .c-form-group__label { color: var(--color-negative); }
    .c-form-group--error .c-form-group__input { border-bottom-color: var(--color-negative); }
    .c-form-group__error-message { display: block; color: var(--color-negative); font-size: 0.875rem; min-height: calc(0.875rem + var(--space-xs)); margin-top: var(--space-xs); opacity: 0; transition: opacity var(--transition-duration) ease; }
    .c-form-group--error .c-form-group__error-message { opacity: 1; }
    .c-spinner { border: 3px solid color-mix(in srgb, var(--color-text-on-accent) 30%, transparent); border-radius: 50%; border-top-color: var(--color-text-on-accent); width: 1.25rem; height: 1.25rem; animation: spin 1s linear infinite; }
    .c-spinner--dark { border-color: color-mix(in srgb, var(--color-accent) 20%, transparent); border-top-color: var(--color-accent); }
 
    /* --- Complex Components --- */
    .c-auth-form { width: 100%; max-width: 400px; text-align: left; }
    .c-auth-form__header { text-align: left; margin-bottom: var(--space-xl); }
    .c-auth-form__logo { height: 20px; width: auto; fill: var(--color-text-primary); margin-bottom: var(--space-lg); }
    .c-auth-form__title { font-size: var(--font-size-h2); font-weight: var(--font-weight-medium); margin: 0; }
    .c-auth-form__prompt { color: var(--color-text-secondary); margin-bottom: var(--space-lg); font-size: 0.875rem; }
    .c-auth-form__options { text-align: right; margin-block: var(--space-md); }
    .c-auth-form__submit-btn { margin-top: var(--space-lg); height: auto; width: 100%; padding: var(--space-md) var(--space-lg); text-transform: uppercase; letter-spacing: var(--letter-spacing-wide); font-size: 0.875rem; }
    .c-auth-form__footer { margin-top: var(--space-lg); padding-top: var(--space-lg); font-size: 0.875rem; color: var(--color-text-secondary); text-align: left; border-top: var(--border-width) solid var(--color-border); }
    .c-auth-brand-panel__logo { width: 180px; fill: var(--color-text-primary); margin-bottom: var(--space-lg); }
    .c-auth-brand-panel__text { max-width: 40ch; color: var(--color-text-secondary); font-size: var(--font-size-p); }
    .c-auth-form__error-summary { padding: var(--space-sm) var(--space-md); background-color: var(--color-negative-bg); border: var(--border-width) solid var(--color-negative); color: var(--color-negative); border-radius: var(--border-radius); margin-bottom: var(--space-lg); font-size: 0.875rem; font-weight: var(--font-weight-medium); display: flex; align-items: center; gap: var(--space-sm); }
    /* The shake animation provides clear visual feedback on form submission errors. */
    .c-auth-form__error-summary:not(:empty) { animation: form-shake 0.5s cubic-bezier(.36,.07,.19,.97); }
    .c-auth-form__error-summary:empty { display: none; }
    .c-auth-form__success-content { text-align: center; color: var(--color-text-secondary); margin-block: var(--space-lg); }
    .c-auth-form__success-icon { font-size: 3rem; color: var(--color-positive); }
    /* The auth form "flipper" animates between login, create, and forgot password views. */
    .c-auth-form-flipper { position: relative; overflow: hidden; transition: height 0.4s cubic-bezier(0.65, 0, 0.35, 1); }
    .c-auth-form-panel { width: 100%; transition: opacity 0.4s ease, transform 0.4s cubic-bezier(0.65, 0, 0.35, 1); }
    /* The active panel is controlled by the `data-view` attribute on the flipper. */
    .c-auth-form-flipper[data-view="login"] .c-auth-form-panel--login,
    .c-auth-form-flipper[data-view="create"] .c-auth-form-panel--create,
    .c-auth-form-flipper[data-view="forgot"] .c-auth-form-panel--forgot,
    .c-auth-form-flipper[data-view="success"] .c-auth-form-panel--success { opacity: 1; transform: translateX(0); position: relative; z-index: 1; }
    /* Inactive panels are positioned absolutely and translated off-screen. */
    .c-auth-form-flipper[data-view="login"] .c-auth-form-panel--create, .c-auth-form-flipper[data-view="login"] .c-auth-form-panel--forgot, .c-auth-form-flipper[data-view="login"] .c-auth-form-panel--success, .c-auth-form-flipper[data-view="create"] .c-auth-form-panel--forgot, .c-auth-form-flipper[data-view="create"] .c-auth-form-panel--success, .c-auth-form-flipper[data-view="forgot"] .c-auth-form-panel--create, .c-auth-form-flipper[data-view="forgot"] .c-auth-form-panel--success { opacity: 0; transform: translateX(20px); position: absolute; top: 0; left: 0; z-index: 0; pointer-events: none; }
    .c-auth-form-flipper[data-view="create"] .c-auth-form-panel--login, .c-auth-form-flipper[data-view="forgot"] .c-auth-form-panel--login, .c-auth-form-flipper[data-view="success"] .c-auth-form-panel--login, .c-auth-form-flipper[data-view="success"] .c-auth-form-panel--create, .c-auth-form-flipper[data-view="success"] .c-auth-form-panel--forgot { opacity: 0; transform: translateX(-20px); position: absolute; top: 0; left: 0; z-index: 0; pointer-events: none; }
    .c-sidebar { display: none; }
    .c-sidebar__header { margin-bottom: var(--space-xl); }
    .c-sidebar__logo-link { display: inline-flex; color: var(--color-text-primary); transition: color var(--transition-duration) ease; margin-left: calc(-1 * var(--space-lg)); margin-bottom: var(--space-sm) }
    .c-sidebar__logo-link svg { height: 24px; width: auto; fill: currentColor; }
    .c-sidebar__footer { display: flex; align-items: center; justify-content: flex-end; gap: var(--space-sm); padding-top: var(--space-lg); }
    .c-sidebar__footer-logout { font-size: 0.875rem; font-weight: var(--font-weight-medium); color: var(--color-text-secondary); display: flex; align-items: center; gap: var(--space-xs); padding: var(--space-xs) var(--space-sm); border-radius: var(--border-radius); transition: all var(--transition-duration) var(--transition-easing); }
    .c-sidebar__footer-logout:hover { color: var(--color-negative); background-color: var(--color-negative-bg); }
    /* The theme toggle uses a grid layout to stack two icons, animating them in and out on theme change. */
    .c-theme-toggle { color: var(--color-text-secondary); width: 2.25rem; height: 2.25rem; display: grid; place-content: center; border-radius: var(--border-radius); transition: color var(--transition-duration) ease, background-color var(--transition-duration) ease; }
    .c-theme-toggle:hover { color: var(--color-text-primary); background-color: var(--color-border); }
    .c-theme-toggle .material-symbols-outlined { grid-area: 1 / 1; transition: transform 0.3s ease-out, opacity 0.3s ease-out; }
    [data-theme="light"] .c-theme-toggle__icon--dark { transform: translateY(100%) scale(0.5); opacity: 0; }
    [data-theme="dark"] .c-theme-toggle__icon--light { transform: translateY(-100%) scale(0.5); opacity: 0; }
    .c-main-nav { flex-shrink: 0; }
    .c-main-nav__list { display: flex; gap: var(--space-sm); list-style: none; transition: background-color var(--transition-duration) ease, border-color var(--transition-duration) ease; }
    .c-main-nav__link { display: flex; justify-content: center; align-items: center; color: var(--color-text-secondary); transition: all var(--transition-duration) var(--transition-easing); z-index: 2; text-decoration: none; border-radius: 50%; width: 3rem; height: 3rem; border-left: 3px solid transparent; }
    .c-main-nav__link--active, .c-main-nav__link:hover { color: var(--color-accent); }
    .c-main-nav__link:hover { background-color: var(--color-background); }
    .c-main-nav__link--logout:hover { color: var(--color-negative); background-color: var(--color-negative-bg); }
    .c-main-nav__divider { margin-block: var(--space-xs); height: 1px; background: var(--color-border); }
    .c-main-nav__spacer { flex-grow: 1; }
    .c-stats-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(250px, 1fr)); gap: var(--space-lg); }
    .c-stat-card { background: var(--color-background); padding: var(--space-lg); border-radius: var(--border-radius); border: var(--border-width) solid var(--color-border); display: flex; align-items: center; gap: var(--space-lg); transition: all var(--transition-duration) ease; }
    .c-stat-card__icon { color: var(--color-accent); }
    .c-stat-card__icon .material-symbols-outlined { font-size: 2.5rem; }
    .c-stat-card__title { font-size: 0.875rem; color: var(--color-text-secondary); }
    .c-stat-card__value { font-size: clamp(1.5rem, 4vw, 2.25rem); font-weight: var(--font-weight-bold); line-height: 1.1; }
    /* A container query adjusts the stat card layout on very narrow containers. */
    @container (max-width: 280px) {
        .c-stat-card { flex-direction: column; align-items: flex-start; }
    }
    .c-table-container { background-color: var(--color-background); border-radius: var(--border-radius); border: var(--border-width) solid var(--color-border); overflow-x: auto; transition: all var(--transition-duration) ease; }
    .c-table { width: 100%; border-collapse: collapse; }
    .c-table th, .c-table td { padding: var(--space-md) var(--space-lg); text-align: left; border-bottom: 1px solid var(--color-border); transition: border-color var(--transition-duration) ease, color var(--transition-duration) ease; }
    .c-table th { font-size: 0.875rem; font-weight: var(--font-weight-bold); color: var(--color-text-secondary); text-transform: uppercase; letter-spacing: 0.05em; }
    .c-table td { color: var(--color-text-primary); }
    .c-table tbody tr:last-child td { border-bottom: none; }
    .c-table tbody tr { transition: background-color var(--transition-duration) var(--transition-easing); }
    .c-table tbody tr:hover { background-color: var(--color-surface); }
    .c-table__action-btn { color: var(--color-text-secondary); padding: var(--space-xs); border-radius: 50%; transition: all var(--transition-duration) ease; display: inline-flex; align-items: center; justify-content: center; width: 2rem; height: 2rem; }
    .c-table__action-btn:hover { color: var(--color-text-primary); background-color: var(--color-border); }
    .c-table__action-btn[data-action="delete-item"]:hover { color: var(--color-negative); background-color: var(--color-negative-bg); }
    .c-status-badge { padding: 0.2rem 0.6rem; border-radius: 1rem; font-size: 0.75rem; font-weight: var(--font-weight-bold); text-transform: capitalize; }
    .c-status-badge--active { background-color: var(--color-positive-bg); color: var(--color-positive); }
    .c-status-badge--expired { background-color: var(--color-negative-bg); color: var(--color-negative); }
    .c-status-badge--warning { background-color: var(--color-warning-bg); color: var(--color-warning); }
 
    /* --- Global UI Elements & App Shell --- */
    .c-app-loader { position: fixed; inset: 0; z-index: 9999; background-color: var(--color-surface); display: grid; place-content: center; transition: opacity 0.5s var(--transition-easing); }
    .c-app-loader.is-hiding { opacity: 0; pointer-events: none; }
    .c-app-loader__logo { width: 180px; height: auto; fill: var(--color-text-primary); animation: loader-pulse 2s ease-in-out infinite; transition: fill var(--transition-duration) ease; }
    /* This class blurs the main app content when a modal is open. */
    body.app-shell--blurred > #app-root, body.app-shell--blurred > #auth-root { filter: blur(4px); pointer-events: none; }
    #app-root, #auth-root { transition: filter var(--transition-duration) ease; }
    .c-modal-dialog { border: none; padding: 0; background: transparent; }
    .c-modal-dialog::backdrop { background-color: color-mix(in srgb, var(--color-background) 80%, transparent); backdrop-filter: blur(8px); animation: backdrop-fade-in var(--transition-duration-long) ease forwards; transition: background-color var(--transition-duration) ease; }
    .c-modal-dialog[open] { animation: dialog-fade-in var(--transition-duration-long) cubic-bezier(0.175, 0.885, 0.32, 1.275); }
    .c-modal-dialog { background: var(--color-background); border-radius: var(--border-radius); padding: var(--space-lg); width: 90%; max-width: 500px; box-shadow: var(--shadow-md); transition: background-color var(--transition-duration) ease; }
    .c-modal-dialog__header { display: flex; justify-content: space-between; align-items: center; border-bottom: var(--border-width) solid var(--color-border); padding-bottom: var(--space-md); margin-bottom: var(--space-lg); transition: border-color var(--transition-duration) ease; }
    .c-modal-dialog__title { font-size: 1.5rem; font-weight: var(--font-weight-bold); }
    .c-modal-dialog__close-btn { color: var(--color-text-secondary); font-size: 1.5rem; line-height: 1; }
    .c-modal-dialog__form { display: flex; flex-direction: column; gap: var(--space-md); }
    .c-modal-dialog__footer { display: flex; justify-content: flex-end; gap: var(--space-sm); margin-top: var(--space-lg); padding-top: var(--space-lg); border-top: var(--border-width) solid var(--color-border); transition: border-color var(--transition-duration) ease; }
    #toast-container { position: fixed; bottom: 1.5rem; right: 1.5rem; z-index: 1000; display: flex; flex-direction: column; gap: 0.75rem; }
    .c-toast { padding: var(--space-md) var(--space-lg); border-radius: var(--border-radius); color: var(--color-text-on-accent); box-shadow: var(--shadow-md); animation: toast-in 0.5s ease forwards; min-width: 250px; }
    .c-toast--success { background-color: var(--color-positive); }
    .c-toast--error { background-color: var(--color-negative); }
    .c-toast--info { background-color: var(--color-accent); }
    .c-toast.exiting { animation: toast-out 0.5s ease forwards; }
    .c-sidebar__portal-tag { font-size: 0.75rem; color: var(--color-text-secondary); background: var(--color-border); padding: 2px 6px; border-radius: var(--border-radius); margin-left: var(--space-md);}
    .c-license-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(300px, 1fr)); gap: var(--space-lg); }
    .c-license-card { display: block; background-color: var(--color-background); border: var(--border-width) solid var(--color-border); border-radius: var(--border-radius); padding: var(--space-lg); text-decoration: none; color: var(--color-text-primary); transition: all var(--transition-duration) ease; }
    .c-license-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: var(--color-accent); }
    .c-license-card__product { font-size: 1.25rem; font-weight: var(--font-weight-bold); margin-bottom: var(--space-sm); }
    .c-license-card__usage { color: var(--color-text-secondary); margin-bottom: var(--space-md); }
    .c-license-card__progress-bar { height: 6px; background-color: var(--color-surface); border-radius: 3px; overflow: hidden; }
    .c-license-card__progress-fill { height: 100%; background-color: var(--color-accent); border-radius: 3px; transition: width var(--transition-duration) ease; }
    .c-back-link { display: inline-flex; align-items: center; gap: var(--space-xs); margin-bottom: var(--space-sm); color: var(--color-text-secondary); text-decoration: none; }
    .c-back-link:hover { color: var(--color-text-primary); }
    .c-license-key-display { font-family: monospace; color: var(--color-text-secondary); background-color: var(--color-surface); padding: var(--space-xs) var(--space-sm); border-radius: var(--border-radius); display: inline-block; margin-top: var(--space-xs); }
 
    /* --- Animations & View Transitions --- */
    @keyframes spin { to { transform: rotate(360deg); } }
    @keyframes loader-pulse { 0%, 100% { transform: scale(1); opacity: 0.8; } 50% { transform: scale(1.02); opacity: 1; } }
    @keyframes form-shake { 10%, 90% { transform: translate3d(-1px, 0, 0); } 20%, 80% { transform: translate3d(2px, 0, 0); } 30%, 50%, 70% { transform: translate3d(-4px, 0, 0); } 40%, 60% { transform: translate3d(4px, 0, 0); } }
    @keyframes fade-in-up { from { opacity: 0; transform: translateY(20px); } to { opacity: 1; transform: translateY(0); } }
    /* The `data-animate` attribute is a hook for JavaScript to trigger animations. */
    [data-animate] { opacity: 0; animation-fill-mode: forwards; }
    /* Staggered animations for list items, controlled by the `--stagger-index` custom property. */
    [data-animate].animate-in { animation: fade-in-up 0.7s cubic-bezier(0.215, 0.61, 0.355, 1) forwards; animation-delay: calc(var(--stagger-index, 0) * 80ms); }
    .row-exiting { animation: shrinkAndFadeOut 0.4s ease-out forwards; }
    @keyframes shrinkAndFadeOut { from { opacity: 1; transform: scaleY(1); height: var(--row-height); } to { opacity: 0; transform: scaleY(0.9); height: 0; } }
    .row-exiting td { padding-top: 0; padding-bottom: 0; border: 0; transition: padding 0.4s ease-out; }
    @keyframes dialog-fade-in { from { opacity: 0; transform: scale(0.95); } to { opacity: 1; transform: scale(1); } }
    @keyframes backdrop-fade-in { from { opacity: 0; } to { opacity: 1; } }
    @keyframes toast-in { from { transform: translateY(120%); opacity: 0; } to { transform: translateY(0); opacity: 1; } }
    @keyframes toast-out { from { transform: translateY(0); opacity: 1; } to { transform: translateY(120%); opacity: 0; } }
    .app-is-logging-out { animation: fade-out-then-remove 0.4s ease-out forwards; }
    @keyframes fade-out-then-remove { to { opacity: 0; transform: scale(0.98); } }
    /* View Transition API pseudo-elements for controlling cross-fade animations. */
    ::view-transition-old(root) { animation: fade-out 0.4s cubic-bezier(0.65, 0, 0.35, 1); }
    ::view-transition-new(root) { animation: fade-in 0.4s cubic-bezier(0.65, 0, 0.35, 1); }
    @keyframes fade-in { from { opacity: 0; } }
    @keyframes fade-out { to { opacity: 0; } }
 
    /* --- Media Queries & Responsive Design --- */
    @media (min-width: 62rem) {
        /* Hide mobile-only elements on larger screens. */
        .c-main-nav__link--mobile-only { display: none; }
        /* Make space for the fixed sidebar. */
        body { padding-left: var(--layout-sidebar-width); padding-bottom: 0; }
        body.is-unauthenticated { padding-left: 0; }
        .l-app__content { padding: var(--space-xl); }
        /* Show the full sidebar on larger screens. */
        .c-sidebar { position: fixed; top: 0; left: 0; height: 100vh; width: var(--layout-sidebar-width); z-index: 100; padding: var(--space-xl) var(--space-lg); border-right: var(--border-width) solid var(--color-border); display: flex; flex-direction: column; background-color: var(--color-surface); transition: all var(--transition-duration) ease; }
        .l-app > .c-main-nav { display: none; }
        /* Adapt the main nav for vertical layout inside the sidebar. */
        .c-sidebar .c-main-nav {
            width: 100%;
            flex-grow: 1;
            display: flex;
            flex-direction: column;
        }
        .c-sidebar .c-main-nav__list {
            flex-direction: column;
            gap: var(--space-xs);
            width: 100%;
            border-radius: 0;
            padding: 0;
            background: transparent;
            border: none;
            align-items: stretch;
            flex-grow: 1;
        }
        .c-sidebar .c-main-nav__link { width: 100%; justify-content: flex-start; gap: var(--space-md); padding: var(--space-sm) var(--space-md); height: auto; border-radius: var(--border-radius); }
        /* Show link labels using the ::after pseudo-element. */
        .c-sidebar .c-main-nav__link::after { content: attr(aria-label); font-weight: var(--font-weight-medium); }
        .c-sidebar .c-main-nav__link--active { color: var(--color-text-primary); background-color: var(--color-background); border-left-color: var(--color-accent); }
        .c-sidebar .c-main-nav__link:hover:not(.c-main-nav__link--active) { color: var(--color-text-primary); background-color: var(--color-background); }
        .l-auth-layout { grid-template-columns: 1fr 1fr; }
    }
 
    @media (max-width: 61.9375rem) {
        /* Styles for smaller screens (tablets and mobile). */
        .c-sidebar__footer-logout { display: none; }
        /* Make space for the bottom navigation bar. */
        body { padding-bottom: 80px; }
        body.is-unauthenticated { padding-bottom: 0; }
        .l-view-header { flex-direction: column; align-items: stretch; }
        .l-view-header .c-btn { width: 100%; }
        /* Style the main nav as a fixed "bottom bar". */
        .c-main-nav { position: fixed; inset: auto var(--space-lg) var(--space-lg) var(--space-lg); z-index: 10; }
        .c-main-nav__list { justify-content: space-around; width: 100%; border-radius: 50px; box-shadow: var(--shadow-md); background: var(--color-surface); padding: var(--space-xs); border: var(--border-width) solid var(--color-border); }
        .c-main-nav__link--active { background-color: var(--color-background); }
        /* The brand panel in the auth layout is hidden on smaller screens. */
        .l-auth-layout__brand-panel { display: none; }
    }
 }