/**
 * Team Retrospective - Main Stylesheet
 *
 * AIDEV-NOTE: Clean, professional design with good contrast for projector visibility.
 * Uses CSS custom properties for easy theming. Mobile-responsive down to 768px.
 */

/* ========================================
   CSS Custom Properties (Theme)
   ======================================== */
:root {
    /* Colors */
    --color-primary: #2563eb;
    --color-primary-hover: #1d4ed8;
    --color-primary-light: #dbeafe;
    --color-secondary: #64748b;
    --color-secondary-hover: #475569;
    --color-danger: #dc2626;
    --color-danger-hover: #b91c1c;
    --color-success: #16a34a;
    --color-warning: #f59e0b;

    /* Backgrounds */
    --bg-primary: #ffffff;
    --bg-secondary: #f8fafc;
    --bg-tertiary: #f1f5f9;

    /* Text */
    --text-primary: #0f172a;
    --text-secondary: #475569;
    --text-muted: #94a3b8;

    /* Borders */
    --border-color: #e2e8f0;
    --border-radius: 8px;
    --border-radius-lg: 12px;

    /* Shadows */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.05);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.1), 0 2px 4px -2px rgb(0 0 0 / 0.1);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.1), 0 4px 6px -4px rgb(0 0 0 / 0.1);

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

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 200ms ease;
    --transition-slow: 300ms ease;

    /* Layout */
    --max-width: 1200px;
    --header-height: 64px;
}

/* AIDEV-NOTE: Dark mode overrides. Applied via html.dark-mode class.
   System preference is detected via JS; user preference stored in localStorage. */
html.dark-mode {
    /* Colors - brighter primary for dark backgrounds */
    --color-primary: #3b82f6;
    --color-primary-hover: #60a5fa;
    --color-primary-light: #1e3a5f;
    --color-secondary: #94a3b8;
    --color-secondary-hover: #cbd5e1;
    --color-danger: #ef4444;
    --color-danger-hover: #f87171;
    --color-success: #22c55e;
    --color-warning: #fbbf24;

    /* Backgrounds - dark slate palette */
    --bg-primary: #1e293b;
    --bg-secondary: #0f172a;
    --bg-tertiary: #334155;

    /* Text - inverted for readability */
    --text-primary: #f1f5f9;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;

    /* Borders */
    --border-color: #334155;

    /* Shadows - higher opacity for dark mode */
    --shadow-sm: 0 1px 2px 0 rgb(0 0 0 / 0.2);
    --shadow-md: 0 4px 6px -1px rgb(0 0 0 / 0.3), 0 2px 4px -2px rgb(0 0 0 / 0.2);
    --shadow-lg: 0 10px 15px -3px rgb(0 0 0 / 0.4), 0 4px 6px -4px rgb(0 0 0 / 0.3);
}

/* ========================================
   Reset & Base Styles
   ======================================== */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 16px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--bg-secondary);
    color: var(--text-primary);
    line-height: 1.5;
    min-height: 100vh;
}

/* ========================================
   Utility Classes
   ======================================== */
.hidden {
    display: none !important;
}

.view {
    min-height: 100vh;
}

/* ========================================
   Buttons
   ======================================== */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 0.875rem;
    font-weight: 500;
    border: none;
    border-radius: var(--border-radius);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}

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

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

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

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

.btn-danger {
    background-color: var(--color-danger);
    color: white;
}

.btn-danger:hover:not(:disabled) {
    background-color: var(--color-danger-hover);
}

.btn-icon {
    padding: var(--spacing-sm);
    background: transparent;
    color: var(--text-secondary);
}

.btn-icon:hover {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
}

.btn-large {
    padding: var(--spacing-md) var(--spacing-xl);
    font-size: 1rem;
}

.btn-small {
    padding: var(--spacing-xs) var(--spacing-sm);
    font-size: 0.75rem;
}

/* ========================================
   Forms
   ======================================== */
.form-group {
    margin-bottom: var(--spacing-md);
}

.form-group label {
    display: block;
    margin-bottom: var(--spacing-xs);
    font-weight: 500;
    color: var(--text-primary);
}

.form-select,
.form-textarea,
input[type="date"],
input[type="text"] {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-select:focus,
.form-textarea:focus,
input[type="date"]:focus,
input[type="text"]:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

.form-textarea {
    resize: vertical;
    min-height: 80px;
}

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

.char-counter {
    text-align: right;
    font-size: 0.75rem;
    color: var(--text-muted);
    margin-top: var(--spacing-xs);
}

.char-counter.warning {
    color: var(--color-warning);
}

.char-counter.danger {
    color: var(--color-danger);
}

.category-hint {
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
    font-style: italic;
}

/* ========================================
   Cards
   ======================================== */
.card {
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-lg);
    box-shadow: var(--shadow-sm);
}

/* ========================================
   Login View
   ======================================== */
.login-container {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: var(--spacing-xl);
    text-align: center;
}

.login-container h1 {
    font-size: 2.5rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.login-subtitle {
    color: var(--text-secondary);
    font-size: 1.125rem;
    margin-bottom: var(--spacing-xl);
}

/* ========================================
   App Header
   ======================================== */
.app-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    height: var(--header-height);
    padding: 0 var(--spacing-xl);
    background-color: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    position: sticky;
    top: 0;
    z-index: 100;
}

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

.app-title {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--text-primary);
}

.header-right {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
}

.user-info {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.user-avatar {
    width: 32px;
    height: 32px;
    border-radius: 50%;
    object-fit: cover;
}

/* ========================================
   Main Content
   ======================================== */
.main-content {
    max-width: var(--max-width);
    margin: 0 auto;
    padding: var(--spacing-xl);
}

/* ========================================
   Dashboard View
   ======================================== */
.dashboard-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-lg);
}

.dashboard-header h2 {
    font-size: 1.5rem;
    font-weight: 600;
}

/* Retrospective List */
.retro-list {
    display: grid;
    gap: var(--spacing-md);
}

.retro-card {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: var(--spacing-lg);
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius-lg);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.retro-card:hover {
    border-color: var(--color-primary);
    box-shadow: var(--shadow-md);
}

.retro-info {
    flex: 1;
    cursor: pointer;
}

.retro-date {
    font-size: 1.125rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.retro-meta {
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.retro-actions {
    display: flex;
    gap: var(--spacing-sm);
}

/* Empty & Loading States */
.empty-state,
.loading-state {
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    padding: var(--spacing-xl) * 2;
    text-align: center;
}

.empty-message {
    font-size: 1.125rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-sm);
}

.empty-hint {
    color: var(--text-secondary);
}

.spinner {
    width: 40px;
    height: 40px;
    border: 3px solid var(--border-color);
    border-top-color: var(--color-primary);
    border-radius: 50%;
    animation: spin 1s linear infinite;
    margin-bottom: var(--spacing-md);
}

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

/* ========================================
   Data Entry View
   ======================================== */
.data-entry-header {
    display: flex;
    align-items: center;
    gap: var(--spacing-lg);
    margin-bottom: var(--spacing-lg);
}

.data-entry-header h2 {
    flex: 1;
    font-size: 1.25rem;
    font-weight: 600;
}

.entry-form-container {
    margin-bottom: var(--spacing-xl);
}

.my-entries-section h3 {
    font-size: 1.125rem;
    margin-bottom: var(--spacing-md);
}

.entries-list {
    display: grid;
    gap: var(--spacing-sm);
}

.entry-card {
    display: flex;
    align-items: flex-start;
    justify-content: space-between;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
}

.entry-content {
    flex: 1;
}

.entry-text {
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.entry-category {
    font-size: 0.75rem;
    color: var(--text-muted);
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.entry-actions {
    display: flex;
    gap: var(--spacing-xs);
}

/* ========================================
   Runner View
   ======================================== */
.runner-container {
    display: flex;
    flex-direction: column;
    min-height: calc(100vh - var(--header-height));
    padding: var(--spacing-xl);
    position: relative;
}

.runner-exit {
    position: absolute;
    top: var(--spacing-xl);
    right: var(--spacing-xl);
}

.runner-content {
    flex: 1;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
    text-align: center;
    padding: var(--spacing-xl) * 2;
}

.runner-category {
    font-size: 1.25rem;
    font-weight: 600;
    color: var(--color-primary);
    text-transform: uppercase;
    letter-spacing: 0.1em;
    margin-bottom: var(--spacing-xl);
}

.runner-entry {
    font-size: 2rem;
    font-weight: 400;
    color: var(--text-primary);
    max-width: 800px;
    margin: 0;
    padding: var(--spacing-lg);
    border-left: 4px solid var(--color-primary);
    text-align: left;
}

.runner-author {
    font-size: 1rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-lg);
}

.runner-nav {
    display: flex;
    justify-content: center;
    gap: var(--spacing-xl);
    margin-top: var(--spacing-xl);
}

.runner-progress {
    display: flex;
    justify-content: center;
    gap: var(--spacing-lg);
    margin-top: var(--spacing-lg);
    font-size: 0.875rem;
    color: var(--text-secondary);
}

.runner-complete {
    text-align: center;
    padding: var(--spacing-xl);
}

.runner-complete h2 {
    font-size: 2rem;
    color: var(--text-primary);
    margin-bottom: var(--spacing-md);
}

.runner-complete p {
    color: var(--text-secondary);
}

/* ========================================
   Modals
   ======================================== */
.modal {
    position: fixed;
    inset: 0;
    z-index: 1000;
    display: flex;
    align-items: center;
    justify-content: center;
}

.modal-backdrop {
    position: absolute;
    inset: 0;
    background-color: rgba(0, 0, 0, 0.5);
}

.modal-content {
    position: relative;
    background-color: var(--bg-primary);
    border-radius: var(--border-radius-lg);
    padding: var(--spacing-xl);
    min-width: 400px;
    max-width: 90vw;
    box-shadow: var(--shadow-lg);
    animation: modalEnter var(--transition-normal);
}

@keyframes modalEnter {
    from {
        opacity: 0;
        transform: scale(0.95);
    }
    to {
        opacity: 1;
        transform: scale(1);
    }
}

.modal-content h3 {
    font-size: 1.25rem;
    margin-bottom: var(--spacing-md);
}

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

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

/* ========================================
   Toast Notifications
   ======================================== */
#toast-container {
    position: fixed;
    bottom: var(--spacing-xl);
    right: var(--spacing-xl);
    z-index: 2000;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.toast {
    display: flex;
    align-items: center;
    gap: var(--spacing-sm);
    padding: var(--spacing-md) var(--spacing-lg);
    background-color: var(--bg-primary);
    border-radius: var(--border-radius);
    box-shadow: var(--shadow-lg);
    animation: toastEnter var(--transition-normal);
    min-width: 300px;
}

@keyframes toastEnter {
    from {
        opacity: 0;
        transform: translateY(20px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.toast.toast-exit {
    animation: toastExit var(--transition-normal) forwards;
}

@keyframes toastExit {
    from {
        opacity: 1;
        transform: translateY(0);
    }
    to {
        opacity: 0;
        transform: translateY(20px);
    }
}

.toast-success {
    border-left: 4px solid var(--color-success);
}

.toast-error {
    border-left: 4px solid var(--color-danger);
}

.toast-warning {
    border-left: 4px solid var(--color-warning);
}

.toast-message {
    flex: 1;
    color: var(--text-primary);
}

.toast-close {
    background: none;
    border: none;
    color: var(--text-muted);
    cursor: pointer;
    padding: var(--spacing-xs);
}

.toast-close:hover {
    color: var(--text-primary);
}

/* ========================================
   Category Management
   ======================================== */
.modal-large {
    min-width: 500px;
    max-width: 600px;
    max-height: 80vh;
    display: flex;
    flex-direction: column;
}

.modal-header {
    display: flex;
    align-items: center;
    justify-content: space-between;
    margin-bottom: var(--spacing-sm);
}

.modal-header h3 {
    margin-bottom: 0;
}

.modal-description {
    color: var(--text-secondary);
    font-size: 0.875rem;
    margin-bottom: var(--spacing-md);
}

.add-category-btn {
    margin-bottom: var(--spacing-md);
}

.category-form {
    background-color: var(--bg-tertiary);
    padding: var(--spacing-md);
    border-radius: var(--border-radius);
    margin-bottom: var(--spacing-md);
}

.categories-list {
    flex: 1;
    overflow-y: auto;
    display: flex;
    flex-direction: column;
    gap: var(--spacing-sm);
}

.category-item {
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: var(--spacing-md);
    padding: var(--spacing-md);
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    transition: border-color var(--transition-fast);
}

.category-item:hover {
    border-color: var(--color-primary);
}

.category-item.category-inactive {
    opacity: 0.6;
    background-color: var(--bg-tertiary);
}

.category-info {
    flex: 1;
    min-width: 0;
}

.category-name {
    font-weight: 500;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

.category-description {
    font-size: 0.875rem;
    color: var(--text-secondary);
    white-space: nowrap;
    overflow: hidden;
    text-overflow: ellipsis;
}

.category-actions {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    flex-shrink: 0;
}

.category-divider {
    display: flex;
    align-items: center;
    gap: var(--spacing-md);
    padding: var(--spacing-sm) 0;
    color: var(--text-muted);
    font-size: 0.75rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.category-divider::before,
.category-divider::after {
    content: '';
    flex: 1;
    height: 1px;
    background-color: var(--border-color);
}

.category-empty-state {
    text-align: center;
    padding: var(--spacing-xl);
    color: var(--text-secondary);
}

.btn-danger-icon {
    color: var(--color-danger);
}

.btn-danger-icon:hover {
    background-color: rgba(220, 38, 38, 0.1);
    color: var(--color-danger-hover);
}

.form-input {
    width: 100%;
    padding: var(--spacing-sm) var(--spacing-md);
    font-size: 1rem;
    border: 1px solid var(--border-color);
    border-radius: var(--border-radius);
    background-color: var(--bg-primary);
    color: var(--text-primary);
    transition: border-color var(--transition-fast), box-shadow var(--transition-fast);
}

.form-input:focus {
    outline: none;
    border-color: var(--color-primary);
    box-shadow: 0 0 0 3px var(--color-primary-light);
}

/* ========================================
   Responsive Design
   ======================================== */
@media (max-width: 768px) {
    .app-header {
        padding: 0 var(--spacing-md);
    }

    .header-right {
        gap: var(--spacing-sm);
    }

    .user-info {
        display: none;
    }

    .main-content {
        padding: var(--spacing-md);
    }

    .dashboard-header {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-md);
    }

    .retro-card {
        flex-direction: column;
        align-items: stretch;
        gap: var(--spacing-md);
    }

    .retro-actions {
        justify-content: flex-end;
    }

    .data-entry-header {
        flex-wrap: wrap;
    }

    .modal-content {
        min-width: auto;
        margin: var(--spacing-md);
    }

    .runner-entry {
        font-size: 1.5rem;
    }

    .runner-nav {
        gap: var(--spacing-md);
    }

    .btn-large {
        padding: var(--spacing-sm) var(--spacing-md);
    }

    /* Category Management Modal */
    .modal-large {
        min-width: auto;
        max-width: 90vw;
        max-height: 85vh;
    }

    .category-item {
        flex-wrap: wrap;
    }

    .category-actions {
        width: 100%;
        justify-content: flex-end;
        margin-top: var(--spacing-sm);
    }
}