@layer reset, base, components, utilities, overrides;

/* ============================================
   Reset
   ============================================ */
@layer reset {
    *,
    *::before,
    *::after {
        box-sizing: border-box;
    }

    * {
        margin: 0;
    }

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

    body {
        line-height: 1.6;
        -webkit-font-smoothing: antialiased;
    }

    img,
    picture,
    video,
    canvas,
    svg {
        display: block;
        max-width: 100%;
    }

    input,
    button,
    textarea,
    select {
        font: inherit;
    }

    p,
    h1,
    h2,
    h3,
    h4,
    h5,
    h6 {
        overflow-wrap: break-word;
    }
}

/* ============================================
   Base - element defaults
   ============================================ */
@layer base {
    body {
        font-family: system-ui, -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, sans-serif;
        background-color: var(--background);
        color: var(--text-primary);
        font-size: var(--font-size-base);
    }

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

    :focus:not(:focus-visible) {
        outline: none;
    }

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

/* ============================================
   Shared components
   ============================================ */
@layer components {

    /* Header */
    .header {
        position: fixed;
        top: 0;
        left: 0;
        right: 0;
        height: var(--header-height);
        background: var(--header-bg);
        border-bottom: none;
        display: flex;
        align-items: center;
        padding: 0 var(--spacing-lg) 0 var(--spacing-sm);
        z-index: 100;
    }

    .header-logo {
        display: flex;
        align-items: center;
        gap: var(--spacing-xs);
        text-decoration: none;
        color: inherit;
    }

    .header-logo-icon {
        flex-shrink: 0;
        color: var(--header-text);
        transform: translateY(-1px);
    }

    .header-logo-img {
        height: 22px;
        width: auto;
        filter: brightness(0) invert(1);
        opacity: 0.85;
        vertical-align: middle;
    }

    .header-logo h1 {
        font-size: var(--font-size-lg);
        font-weight: 600;
        color: var(--header-text-muted);
    }

    /* Header navigation -- positioned above main content area */
    .header-nav {
        display: flex;
        align-items: center;
        gap: var(--spacing-lg);
        height: 100%;
        position: absolute;
        left: calc(var(--sidebar-width) + var(--spacing-xl));
    }

    .header-nav-link {
        display: flex;
        align-items: center;
        gap: var(--spacing-sm);
        color: var(--header-text-muted);
        text-decoration: none;
        font-size: var(--font-size-base);
        font-weight: 600;
        padding: var(--spacing-sm);
        border-radius: var(--radius-sm);
        transition: color var(--transition-base), background-color var(--transition-base);
    }

    button.header-nav-link {
        background: none;
        border: none;
        cursor: pointer;
        font-family: inherit;
    }

    .header-nav-link:hover {
        color: var(--header-text);
        background: rgba(255, 255, 255, 0.1);
    }

    .header-nav-link.active {
        color: var(--header-text);
        background: rgba(255, 255, 255, 0.15);
    }

    .header-nav-link svg {
        flex-shrink: 0;
    }

    .version-info {
        font-size: var(--font-size-xs);
        color: var(--text-secondary);
    }

    .header-user {
        display: flex;
        align-items: center;
        align-self: stretch;
        gap: var(--spacing-lg);
        margin-left: auto;
    }

    /* User menu dropdown */
    .header-user-menu {
        position: relative;
        order: 2;
    }

    .header-user-btn {
        display: flex;
        flex-direction: row-reverse;
        align-items: center;
        gap: var(--spacing-sm);
        background: none;
        border: none;
        cursor: pointer;
        color: var(--header-text-muted);
        padding: 0 var(--spacing-sm);
        border-radius: var(--radius-sm);
        font-size: var(--font-size-base);
        font-weight: 600;
        transition: color var(--transition-base), background-color var(--transition-base);
    }

    .header-user-btn span {
        overflow: hidden;
        text-overflow: ellipsis;
        white-space: nowrap;
        max-width: 20ch;
    }

    .header-user-btn:hover {
        color: var(--header-text);
        background: rgba(255, 255, 255, 0.1);
    }

    .header-user-dropdown {
        display: none;
        position: absolute;
        top: calc(100% + var(--spacing-xs));
        right: 0;
        min-width: 160px;
        background: var(--surface);
        border: 1px solid var(--border-color);
        border-radius: var(--radius-md);
        box-shadow: 0 4px 12px var(--overlay);
        z-index: 100;
        padding: var(--spacing-xs) 0;
    }

    .header-user-dropdown.open {
        display: block;
    }

    .header-user-dropdown-item {
        display: flex;
        align-items: center;
        justify-content: space-between;
        width: 100%;
        padding: var(--spacing-sm) var(--spacing-base);
        background: none;
        border: none;
        cursor: pointer;
        color: var(--text-primary);
        font-size: var(--font-size-sm);
        text-decoration: none;
        transition: background-color var(--transition-base);
    }

    .header-user-dropdown-item:hover {
        background: var(--surface-hover);
    }

    .theme-toggle-label {
        font-size: var(--font-size-lg);
        line-height: 1;
    }

    /* Theme toggle (login page standalone) */
    .theme-toggle-btn {
        background: none;
        border: none;
        cursor: pointer;
        font-size: var(--font-size-lg);
        padding: var(--spacing-xs);
        line-height: 1;
        color: var(--header-text-muted);
        transition: color var(--transition-base), background-color var(--transition-base);
        border-radius: var(--radius-sm);
    }

    .theme-toggle-btn:hover {
        color: var(--header-text);
        background: rgba(255, 255, 255, 0.1);
    }

    /* Header left section */
    .header-left {
        display: flex;
        align-items: center;
        gap: var(--spacing-md);
    }

    /* Main layout */
    .main {
        padding-top: var(--header-height);
        min-height: 100vh;
    }

    /* Right panel toggle (clock + timer) -- absolutely positioned to align
       with the main content area's right edge, independent of doctor name */
    .right-panel-toggle {
        display: none;
        visibility: hidden;
        pointer-events: none;
        position: absolute;
        right: calc(var(--right-panel-width) + var(--spacing-xl));
        top: 50%;
        transform: translateY(-50%);
        background: none;
        border: none;
        border-radius: var(--radius-sm);
        cursor: pointer;
        padding: var(--spacing-sm);
        color: var(--header-text-muted);
        font-family: inherit;
        font-size: var(--font-size-base);
        font-weight: 600;
        align-items: center;
        gap: var(--spacing-sm);
        transition: color var(--transition-base), background-color var(--transition-base);
    }

    .right-panel-toggle svg {
        flex-shrink: 0;
    }

    /* Always visible + active on patient pages (timer is always running) */
    body:has(.right-panel) .right-panel-toggle {
        display: flex;
        visibility: visible;
        pointer-events: auto;
        color: var(--header-text);
        background: rgba(255, 255, 255, 0.15);

        &:hover {
            color: var(--header-text);
        }
    }

    /* When collapsed: visible, muted color, no highlight */
    html.rp-collapsed .right-panel-toggle {
        visibility: visible;
        pointer-events: auto;
        color: var(--header-text-muted);
        background: none;
    }

    /* Timer readout: hidden by default, shown when panel collapsed */
    .rp-toggle-time {
        display: none;
        order: -1;
        font-variant-numeric: tabular-nums;
    }

    .rp-collapsed .rp-toggle-time {
        display: inline;
    }

    /* Buttons */
    .btn {
        display: inline-block;
        padding: var(--spacing-md) var(--spacing-lg);
        border: none;
        border-radius: var(--radius-sm);
        font-size: var(--font-size-base);
        cursor: pointer;
        text-decoration: none;
        transition: background-color var(--transition-base);
    }

    .btn-primary {
        background: var(--primary-dark);
        color: var(--on-primary);
    }

    .btn-primary:hover {
        filter: brightness(1.15);
    }

    .btn-secondary {
        background: transparent;
        color: var(--text-primary);
        border: 1px solid var(--border-color);
    }

    .btn-secondary:hover {
        background: var(--surface-hover);
    }

    .btn-sm {
        padding: var(--spacing-xs) var(--spacing-md);
        font-size: var(--font-size-sm);
    }

    .btn:disabled {
        opacity: 0.4;
        cursor: not-allowed;
    }

    /* Flash messages */
    .flash-messages {
        padding: 0 var(--spacing-lg);
        margin-top: var(--spacing-md);
    }

    .flash {
        padding: var(--spacing-md) var(--spacing-base);
        border-radius: var(--radius-sm);
        margin-bottom: var(--spacing-md);
        font-size: var(--font-size-base);
        display: flex;
        align-items: center;
        gap: var(--spacing-sm);
    }

    .flash svg {
        flex-shrink: 0;
    }

    .flash-error {
        background: var(--error-tint);
        color: var(--error-text);
        border: 1px solid var(--error-text);
    }

    .flash-info {
        background: var(--info-tint);
        color: var(--primary-color);
        border: 1px solid var(--primary-color);
    }

    .flash-success {
        background: var(--success-tint);
        color: var(--success-text);
        border: 1px solid var(--success-text);
    }

    .flash-warning {
        background: var(--warning-tint);
        color: var(--warning-color);
        border: 1px solid var(--warning-color);
    }

    [data-theme="light"] .flash-error {
        background: #ffebee;
    }

    [data-theme="light"] .flash-info {
        background: #e3f2fd;
    }

    [data-theme="light"] .flash-success {
        background: #e8f5e9;
    }

    [data-theme="light"] .flash-warning {
        background: #fff8e1;
    }

    /* Loading states */
    .loading {
        text-align: center;
        color: var(--text-secondary);
        padding: var(--spacing-3xl);
        font-size: var(--font-size-base);
    }

    .content-loader {
        display: flex;
        flex-direction: column;
        align-items: center;
        justify-content: center;
        gap: var(--spacing-lg);
        padding: 80px var(--spacing-lg);
        color: var(--text-secondary);
        font-size: var(--font-size-base);
    }

    .loader-spinner {
        width: 40px;
        height: 40px;
        border: 3px solid var(--border-color);
        border-top-color: var(--primary-color);
        border-radius: var(--radius-full);
        animation: spin 0.8s linear infinite;
    }

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

    /* Error and empty states */
    .error-message,
    .no-data {
        text-align: center;
        padding: var(--spacing-xl) var(--spacing-lg);
        color: var(--text-secondary);
        font-size: var(--font-size-base);
    }

    .error-message svg,
    .no-data svg {
        display: block;
        margin: 0 auto var(--spacing-sm);
        opacity: 0.4;
    }

    .error-message {
        color: var(--error-text);
        background: var(--error-tint);
        border-radius: var(--radius-sm);
    }

    [data-theme="light"] .error-message {
        background: #ffebee;
    }

    /* Force light color scheme for form elements in light mode */
    [data-theme="light"] input[type="checkbox"],
    [data-theme="light"] input[type="text"],
    [data-theme="light"] input[type="password"],
    [data-theme="light"] input[type="search"] {
        color-scheme: light;
    }

} /* end @layer components */

/* ============================================
   Utilities
   ============================================ */
@layer utilities {
    [x-cloak] {
        display: none !important;
    }

    .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;
    }
}

/* ============================================
   Overrides - shared responsive and a11y
   ============================================ */
@layer overrides {

    /* Sidebar collapses at 1230px (matches dashboard.css breakpoint) */
    @media (max-width: 1230px) {
        .header-nav {
            position: static;
            margin-left: var(--spacing-base);
        }
    }

    @media (max-width: 900px) {
        /* Clock button visible on patient pages at mobile */
        body:has(.right-panel) .right-panel-toggle {
            visibility: visible;
            pointer-events: auto;
        }

        .header {
            padding: 0 var(--spacing-base);
        }

        .header-logo-full {
            display: none;
        }

        .header-nav-link {
            font-size: var(--font-size-sm);
        }

        .header-user-btn span {
            font-size: var(--font-size-sm);
        }

        .header-user {
            gap: var(--spacing-md);
        }

        .btn-secondary {
            padding: var(--spacing-sm) var(--spacing-md);
            font-size: var(--font-size-sm);
        }
    }

    @media (max-width: 570px) {
        .header-logo {
            display: none;
        }

        .header-nav-link span,
        .header-user-btn span {
            display: none;
        }
    }

    /* High contrast preference */
    @media (prefers-contrast: more) {
        :root {
            --border-color: #000000;
        }
        [data-theme="light"] {
            --border-color: #000000;
            --text-secondary: #444444;
        }
        .btn {
            border-width: 2px;
        }
    }

    /* Windows High Contrast / forced colors */
    @media (forced-colors: active) {
        .btn {
            border: 2px solid currentColor;
        }
    }

    /* Smooth theme transitions -- only active after first toggle */
    .theme-ready,
    .theme-ready .header,
    .theme-ready .sidebar,
    .theme-ready .right-panel,
    .theme-ready .main-content,
    .theme-ready .dashboard-layout,
    .theme-ready .cycle-card,
    .theme-ready .patient-header-card,
    .theme-ready .info-card,
    .theme-ready .login-container,
    .theme-ready .login-card {
        transition: background-color 0.3s ease, color 0.3s ease, border-color 0.3s ease;
    }

} /* end @layer overrides */

/* Error pages */
.error-page {
    text-align: center;
    padding: var(--spacing-2xl) var(--spacing-base);
}

.error-page h2 {
    font-size: 4rem;
    font-weight: 700;
    color: var(--text-secondary);
    margin-bottom: var(--spacing-sm);
}

.error-page p {
    color: var(--text-secondary);
    margin-bottom: var(--spacing-lg);
}

.error-page a {
    color: var(--color-primary);
}