/*
 * Jiminy - Academic Research Assistant
 * "Let your conscience be your guide"
 *
 * Vintage Scholar's Study Aesthetic
 * Warm, trustworthy, gently encouraging
 */

/* =========================================================================
   CSS Custom Properties - Jiminy Theme
   ========================================================================= */

:root {
    /* Primary Colors */
    --color-forest: #2D5A3D;
    --color-forest-dark: #1E3D29;
    --color-forest-light: #3D7A52;

    /* Accent Colors */
    --color-amber: #D4A84B;
    --color-amber-light: #E8C97D;
    --color-amber-dark: #B8922F;

    /* Background Colors */
    --color-cream: #FDF6E3;
    --color-cream-warm: #F5ECD7;
    --color-cream-dark: #EDE4D0;

    /* Text Colors */
    --color-charcoal: #2C2C2C;
    --color-charcoal-light: #4A4A4A;
    --color-charcoal-muted: #6B6B6B;

    /* Secondary Accent */
    --color-teal: #5B9A8B;
    --color-teal-light: #7AB5A7;

    /* State Colors */
    --color-error: #C75B5B;
    --color-error-light: #F5E6E6;
    --color-success: #4A8B5C;
    --color-success-light: #E6F2E9;

    /* Shadows */
    --shadow-warm-sm: 0 1px 3px rgba(44, 44, 44, 0.08), 0 1px 2px rgba(212, 168, 75, 0.04);
    --shadow-warm-md: 0 4px 6px rgba(44, 44, 44, 0.07), 0 2px 4px rgba(212, 168, 75, 0.05);
    --shadow-warm-lg: 0 10px 15px rgba(44, 44, 44, 0.08), 0 4px 6px rgba(212, 168, 75, 0.06);

    /* Transitions */
    --transition-fast: 150ms ease;
    --transition-normal: 250ms ease;
    --transition-slow: 400ms ease;

    /* Border Radius */
    --radius-sm: 4px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-xl: 20px;

    /* Spacing */
    --space-xs: 0.25rem;
    --space-sm: 0.5rem;
    --space-md: 1rem;
    --space-lg: 1.5rem;
    --space-xl: 2rem;
    --space-2xl: 3rem;
}

/* =========================================================================
   Base Styles
   ========================================================================= */

* {
    box-sizing: border-box;
}

html {
    scroll-behavior: smooth;
}

body {
    font-family: 'Source Sans 3', -apple-system, BlinkMacSystemFont, sans-serif;
    font-size: 16px;
    line-height: 1.6;
    color: var(--color-charcoal);
    background-color: var(--color-cream);
    background-image:
        radial-gradient(ellipse at top, rgba(212, 168, 75, 0.03) 0%, transparent 50%),
        linear-gradient(to bottom, var(--color-cream) 0%, var(--color-cream-warm) 100%);
    min-height: 100vh;
}

/* =========================================================================
   Typography
   ========================================================================= */

h1, h2, h3, h4, h5, h6 {
    font-family: 'Fraunces', Georgia, serif;
    font-weight: 600;
    line-height: 1.3;
    color: var(--color-charcoal);
    margin: 0 0 var(--space-md) 0;
}

h1 { font-size: 2.25rem; font-weight: 700; }
h2 { font-size: 1.75rem; }
h3 { font-size: 1.375rem; }
h4 { font-size: 1.125rem; }

p {
    margin: 0 0 var(--space-md) 0;
}

a {
    color: var(--color-forest);
    text-decoration: none;
    transition: color var(--transition-fast);
}

a:hover {
    color: var(--color-forest-dark);
}

code, pre {
    font-family: 'JetBrains Mono', 'Fira Code', monospace;
    font-size: 0.875em;
}

code {
    background: var(--color-cream-dark);
    padding: 0.125em 0.375em;
    border-radius: var(--radius-sm);
}

pre {
    background: var(--color-charcoal);
    color: var(--color-cream);
    padding: var(--space-md);
    border-radius: var(--radius-md);
    overflow-x: auto;
}

pre code {
    background: transparent;
    padding: 0;
}

.text-muted {
    color: var(--color-charcoal-muted);
}

.text-success {
    color: var(--color-success);
}

.text-error {
    color: var(--color-error);
}

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

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.container-narrow {
    max-width: 800px;
}

.container-wide {
    max-width: 1400px;
}

/* =========================================================================
   Navigation
   ========================================================================= */

.nav {
    background: linear-gradient(to bottom, var(--color-forest-dark), var(--color-forest));
    padding: var(--space-md) 0;
    box-shadow: var(--shadow-warm-md);
    position: sticky;
    top: 0;
    z-index: 100;
}

.nav-container {
    display: flex;
    align-items: center;
    justify-content: space-between;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 var(--space-lg);
}

.nav-brand {
    display: flex;
    align-items: center;
    gap: var(--space-sm);
    color: var(--color-cream);
    font-family: 'Fraunces', serif;
    font-size: 1.5rem;
    font-weight: 700;
    text-decoration: none;
}

.nav-brand:hover {
    color: var(--color-amber-light);
}

.nav-brand .cricket-icon {
    font-size: 1.75rem;
}

.nav-links {
    display: flex;
    align-items: center;
    gap: var(--space-lg);
}

.nav-link {
    color: rgba(253, 246, 227, 0.85);
    font-weight: 500;
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    transition: all var(--transition-fast);
}

.nav-link:hover {
    color: var(--color-cream);
    background: rgba(253, 246, 227, 0.1);
}

.nav-link.active {
    color: var(--color-amber);
}

.nav-user {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    color: rgba(253, 246, 227, 0.7);
    font-size: 0.875rem;
}

/* Mobile navigation */
@media (max-width: 768px) {
    .nav-links {
        display: none;
    }

    .nav-mobile-toggle {
        display: block;
    }
}

/* =========================================================================
   Buttons
   ========================================================================= */

.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: var(--space-sm);
    padding: var(--space-sm) var(--space-lg);
    font-family: 'Source Sans 3', sans-serif;
    font-size: 1rem;
    font-weight: 600;
    border: none;
    border-radius: var(--radius-md);
    cursor: pointer;
    transition: all var(--transition-fast);
    text-decoration: none;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

.btn-primary {
    background: linear-gradient(to bottom, var(--color-forest-light), var(--color-forest));
    color: var(--color-cream);
    box-shadow: var(--shadow-warm-sm);
}

.btn-primary:hover:not(:disabled) {
    background: linear-gradient(to bottom, var(--color-forest), var(--color-forest-dark));
    transform: translateY(-1px);
    box-shadow: var(--shadow-warm-md);
}

.btn-secondary {
    background: var(--color-cream);
    color: var(--color-forest);
    border: 2px solid var(--color-forest);
}

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

.btn-amber {
    background: linear-gradient(to bottom, var(--color-amber-light), var(--color-amber));
    color: var(--color-charcoal);
    box-shadow: var(--shadow-warm-sm);
}

.btn-amber:hover:not(:disabled) {
    background: linear-gradient(to bottom, var(--color-amber), var(--color-amber-dark));
    transform: translateY(-1px);
}

.btn-ghost {
    background: transparent;
    color: var(--color-charcoal);
}

.btn-ghost:hover:not(:disabled) {
    background: var(--color-cream-dark);
}

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

.btn-danger:hover:not(:disabled) {
    background: #a84a4a;
}

.btn-sm {
    padding: var(--space-xs) var(--space-md);
    font-size: 0.875rem;
}

.btn-lg {
    padding: var(--space-md) var(--space-xl);
    font-size: 1.125rem;
}

/* =========================================================================
   Cards
   ========================================================================= */

.card {
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-warm-sm);
    border: 1px solid rgba(212, 168, 75, 0.1);
    overflow: hidden;
    transition: all var(--transition-normal);
}

.card:hover {
    box-shadow: var(--shadow-warm-md);
    transform: translateY(-2px);
}

.card-body {
    padding: var(--space-lg);
}

.card-header {
    padding: var(--space-md) var(--space-lg);
    border-bottom: 1px solid var(--color-cream-dark);
    background: var(--color-cream);
}

.card-footer {
    padding: var(--space-md) var(--space-lg);
    border-top: 1px solid var(--color-cream-dark);
    background: var(--color-cream);
}

/* Paper card specific styles */
.paper-card {
    position: relative;
}

.paper-card .paper-year {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    background: var(--color-amber);
    color: var(--color-charcoal);
    padding: var(--space-xs) var(--space-sm);
    border-radius: var(--radius-sm);
    font-size: 0.75rem;
    font-weight: 600;
}

.paper-card .paper-title {
    font-family: 'Fraunces', serif;
    font-size: 1.125rem;
    margin-bottom: var(--space-sm);
    padding-right: 3rem;
}

.paper-card .paper-authors {
    color: var(--color-charcoal-muted);
    font-size: 0.875rem;
    margin-bottom: var(--space-sm);
}

.paper-card .paper-journal {
    color: var(--color-teal);
    font-size: 0.875rem;
    font-style: italic;
}

/* =========================================================================
   Forms
   ========================================================================= */

.form-group {
    margin-bottom: var(--space-lg);
}

.form-label {
    display: block;
    margin-bottom: var(--space-sm);
    font-weight: 600;
    color: var(--color-charcoal);
}

.form-input,
.form-select,
.form-textarea {
    width: 100%;
    padding: var(--space-sm) var(--space-md);
    font-family: inherit;
    font-size: 1rem;
    color: var(--color-charcoal);
    background: white;
    border: 2px solid var(--color-cream-dark);
    border-radius: var(--radius-md);
    transition: all var(--transition-fast);
}

.form-input:focus,
.form-select:focus,
.form-textarea:focus {
    outline: none;
    border-color: var(--color-forest);
    box-shadow: 0 0 0 3px rgba(45, 90, 61, 0.1);
}

.form-input::placeholder {
    color: var(--color-charcoal-muted);
}

.form-textarea {
    resize: vertical;
    min-height: 100px;
}

.form-error {
    color: var(--color-error);
    font-size: 0.875rem;
    margin-top: var(--space-xs);
}

.form-hint {
    color: var(--color-charcoal-muted);
    font-size: 0.875rem;
    margin-top: var(--space-xs);
}

/* =========================================================================
   Alerts
   ========================================================================= */

.alert {
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    margin-bottom: var(--space-lg);
    display: flex;
    align-items: flex-start;
    gap: var(--space-md);
}

.alert-success {
    background: var(--color-success-light);
    border: 1px solid var(--color-success);
    color: var(--color-success);
}

.alert-error {
    background: var(--color-error-light);
    border: 1px solid var(--color-error);
    color: var(--color-error);
}

.alert-info {
    background: rgba(91, 154, 139, 0.1);
    border: 1px solid var(--color-teal);
    color: var(--color-teal);
}

/* =========================================================================
   Search Bar
   ========================================================================= */

.search-container {
    position: relative;
    max-width: 600px;
    margin: 0 auto;
}

.search-input {
    width: 100%;
    padding: var(--space-md) var(--space-xl);
    padding-left: 3rem;
    font-size: 1.125rem;
    border: 2px solid var(--color-cream-dark);
    border-radius: var(--radius-xl);
    background: white;
    box-shadow: var(--shadow-warm-sm);
    transition: all var(--transition-fast);
}

.search-input:focus {
    outline: none;
    border-color: var(--color-forest);
    box-shadow: var(--shadow-warm-md);
}

.search-icon {
    position: absolute;
    left: var(--space-lg);
    top: 50%;
    transform: translateY(-50%);
    color: var(--color-charcoal-muted);
}

.search-btn {
    position: absolute;
    right: var(--space-sm);
    top: 50%;
    transform: translateY(-50%);
}

/* =========================================================================
   Chat Interface
   ========================================================================= */

.chat-container {
    display: flex;
    flex-direction: column;
    height: calc(100vh - 80px);
    max-width: 900px;
    margin: 0 auto;
}

.chat-header {
    display: flex;
    align-items: center;
    gap: var(--space-md);
    padding: var(--space-lg);
    border-bottom: 1px solid var(--color-cream-dark);
    background: white;
}

.chat-header .jiminy-icon {
    font-size: 2.5rem;
    line-height: 1;
}

.chat-header h1 {
    margin: 0;
    font-size: 1.5rem;
}

.chat-header .subtitle {
    color: var(--color-charcoal-muted);
    font-size: 0.875rem;
    margin: 0;
}

.chat-messages {
    flex: 1;
    overflow-y: auto;
    padding: var(--space-lg);
    display: flex;
    flex-direction: column;
    gap: var(--space-lg);
}

.message {
    display: flex;
    gap: var(--space-md);
    max-width: 85%;
    animation: messageSlideIn 0.3s ease;
}

@keyframes messageSlideIn {
    from {
        opacity: 0;
        transform: translateY(10px);
    }
    to {
        opacity: 1;
        transform: translateY(0);
    }
}

.message-user {
    align-self: flex-end;
    flex-direction: row-reverse;
}

.message-jiminy {
    align-self: flex-start;
}

.message-avatar {
    width: 40px;
    height: 40px;
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1.5rem;
    flex-shrink: 0;
}

.message-jiminy .message-avatar {
    background: var(--color-forest);
}

.message-user .message-avatar {
    background: var(--color-amber);
}

.message-content {
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-lg);
    line-height: 1.6;
}

.message-jiminy .message-content {
    background: white;
    border: 1px solid var(--color-cream-dark);
    border-top-left-radius: var(--radius-sm);
}

.message-user .message-content {
    background: var(--color-forest);
    color: var(--color-cream);
    border-top-right-radius: var(--radius-sm);
}

/* Citations in messages */
.citation-link {
    color: var(--color-amber-dark);
    background: rgba(212, 168, 75, 0.15);
    padding: 0.125em 0.375em;
    border-radius: var(--radius-sm);
    font-weight: 600;
    transition: all var(--transition-fast);
}

.citation-link:hover {
    background: var(--color-amber);
    color: var(--color-charcoal);
}

/* Chat status indicator */
.chat-status {
    padding: var(--space-sm) var(--space-lg);
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-charcoal-muted);
    min-height: 32px;
}

.chat-status.status-searching {
    color: var(--color-teal);
}

.chat-status.status-streaming {
    color: var(--color-forest);
}

.chat-status.status-error {
    color: var(--color-error);
}

/* Searching animation */
.searching-indicator {
    display: inline-flex;
    align-items: center;
    gap: var(--space-sm);
}

.searching-indicator::after {
    content: '';
    width: 1em;
    height: 1em;
    border: 2px solid var(--color-teal);
    border-top-color: transparent;
    border-radius: 50%;
    animation: spin 1s linear infinite;
}

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

/* Chat input area */
.chat-input-container {
    display: flex;
    gap: var(--space-md);
    padding: var(--space-lg);
    background: white;
    border-top: 1px solid var(--color-cream-dark);
}

.chat-input-container textarea {
    flex: 1;
    padding: var(--space-md);
    border: 2px solid var(--color-cream-dark);
    border-radius: var(--radius-md);
    resize: none;
    font-family: inherit;
    font-size: 1rem;
    line-height: 1.5;
    min-height: 56px;
    max-height: 200px;
}

.chat-input-container textarea:focus {
    outline: none;
    border-color: var(--color-forest);
}

.input-hint {
    text-align: center;
    padding: 0 var(--space-lg) var(--space-md);
    color: var(--color-charcoal-muted);
    font-size: 0.75rem;
    background: white;
}

/* Example prompts */
.example-prompts {
    list-style: none;
    padding: 0;
    margin: var(--space-md) 0;
}

.example-prompts li {
    margin: var(--space-sm) 0;
}

.prompt-suggestion {
    background: var(--color-cream);
    border: 1px solid var(--color-cream-dark);
    padding: var(--space-sm) var(--space-md);
    border-radius: var(--radius-md);
    cursor: pointer;
    font-size: 0.875rem;
    transition: all var(--transition-fast);
    text-align: left;
    width: 100%;
}

.prompt-suggestion:hover {
    background: var(--color-cream-dark);
    border-color: var(--color-amber);
}

/* =========================================================================
   Upload Zone
   ========================================================================= */

.upload-zone {
    border: 3px dashed var(--color-cream-dark);
    border-radius: var(--radius-lg);
    padding: var(--space-2xl);
    text-align: center;
    transition: all var(--transition-fast);
    background: white;
    cursor: pointer;
}

.upload-zone:hover,
.upload-zone.dragover {
    border-color: var(--color-forest);
    background: rgba(45, 90, 61, 0.02);
}

.upload-zone-icon {
    font-size: 3rem;
    margin-bottom: var(--space-md);
}

.upload-zone-text {
    font-size: 1.125rem;
    color: var(--color-charcoal);
    margin-bottom: var(--space-sm);
}

.upload-zone-hint {
    color: var(--color-charcoal-muted);
    font-size: 0.875rem;
}

/* Upload progress */
.upload-progress {
    margin-top: var(--space-lg);
}

.progress-bar {
    height: 8px;
    background: var(--color-cream-dark);
    border-radius: var(--radius-sm);
    overflow: hidden;
}

.progress-bar-fill {
    height: 100%;
    background: linear-gradient(to right, var(--color-forest), var(--color-teal));
    transition: width 0.3s ease;
}

/* =========================================================================
   Stats Cards
   ========================================================================= */

.stats-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: var(--space-lg);
    margin-bottom: var(--space-xl);
}

.stat-card {
    background: white;
    padding: var(--space-lg);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-warm-sm);
    border-left: 4px solid var(--color-amber);
}

.stat-value {
    font-family: 'Fraunces', serif;
    font-size: 2rem;
    font-weight: 700;
    color: var(--color-forest);
    margin-bottom: var(--space-xs);
}

.stat-label {
    color: var(--color-charcoal-muted);
    font-size: 0.875rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* =========================================================================
   BibTeX Display
   ========================================================================= */

.bibtex-container {
    position: relative;
}

.bibtex-content {
    background: var(--color-charcoal);
    color: var(--color-cream);
    padding: var(--space-lg);
    border-radius: var(--radius-md);
    font-family: 'JetBrains Mono', monospace;
    font-size: 0.875rem;
    overflow-x: auto;
    white-space: pre-wrap;
    word-break: break-word;
}

.bibtex-copy-btn {
    position: absolute;
    top: var(--space-md);
    right: var(--space-md);
    background: rgba(253, 246, 227, 0.1);
    color: var(--color-cream);
    border: none;
    padding: var(--space-sm);
    border-radius: var(--radius-sm);
    cursor: pointer;
    transition: all var(--transition-fast);
}

.bibtex-copy-btn:hover {
    background: rgba(253, 246, 227, 0.2);
}

/* =========================================================================
   Toast Notifications
   ========================================================================= */

.toast-container {
    position: fixed;
    bottom: var(--space-xl);
    right: var(--space-xl);
    z-index: 1000;
    display: flex;
    flex-direction: column;
    gap: var(--space-md);
}

.toast {
    background: white;
    padding: var(--space-md) var(--space-lg);
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-warm-lg);
    display: flex;
    align-items: center;
    gap: var(--space-md);
    animation: toastSlideIn 0.3s ease;
}

@keyframes toastSlideIn {
    from {
        opacity: 0;
        transform: translateX(100%);
    }
    to {
        opacity: 1;
        transform: translateX(0);
    }
}

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

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

/* =========================================================================
   Login/Register Pages
   ========================================================================= */

.auth-container {
    min-height: calc(100vh - 80px);
    display: flex;
    align-items: center;
    justify-content: center;
    padding: var(--space-xl);
}

.auth-card {
    width: 100%;
    max-width: 420px;
    background: white;
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-warm-lg);
    overflow: hidden;
}

.auth-header {
    background: linear-gradient(to bottom right, var(--color-forest-dark), var(--color-forest));
    color: var(--color-cream);
    padding: var(--space-xl);
    text-align: center;
}

.auth-header .jiminy-icon {
    font-size: 4rem;
    margin-bottom: var(--space-md);
    display: block;
}

.auth-header h1 {
    color: var(--color-cream);
    margin-bottom: var(--space-xs);
}

.auth-header .tagline {
    color: var(--color-amber-light);
    font-style: italic;
    font-family: 'Fraunces', serif;
}

.auth-body {
    padding: var(--space-xl);
}

.auth-footer {
    text-align: center;
    padding: var(--space-lg);
    background: var(--color-cream);
    border-top: 1px solid var(--color-cream-dark);
}

/* =========================================================================
   Responsive Design
   ========================================================================= */

@media (max-width: 768px) {
    :root {
        --space-lg: 1rem;
        --space-xl: 1.5rem;
    }

    h1 { font-size: 1.75rem; }
    h2 { font-size: 1.5rem; }

    .container {
        padding: 0 var(--space-md);
    }

    .chat-container {
        height: calc(100vh - 60px);
    }

    .message {
        max-width: 95%;
    }

    .stats-grid {
        grid-template-columns: repeat(2, 1fr);
    }
}

@media (max-width: 480px) {
    .stats-grid {
        grid-template-columns: 1fr;
    }

    .auth-card {
        margin: var(--space-md);
    }
}

/* =========================================================================
   Utility Classes
   ========================================================================= */

.mt-0 { margin-top: 0; }
.mt-1 { margin-top: var(--space-xs); }
.mt-2 { margin-top: var(--space-sm); }
.mt-3 { margin-top: var(--space-md); }
.mt-4 { margin-top: var(--space-lg); }
.mt-5 { margin-top: var(--space-xl); }

.mb-0 { margin-bottom: 0; }
.mb-1 { margin-bottom: var(--space-xs); }
.mb-2 { margin-bottom: var(--space-sm); }
.mb-3 { margin-bottom: var(--space-md); }
.mb-4 { margin-bottom: var(--space-lg); }
.mb-5 { margin-bottom: var(--space-xl); }

.text-center { text-align: center; }
.text-right { text-align: right; }

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-center { justify-content: center; }
.justify-between { justify-content: space-between; }
.gap-1 { gap: var(--space-xs); }
.gap-2 { gap: var(--space-sm); }
.gap-3 { gap: var(--space-md); }
.gap-4 { gap: var(--space-lg); }

.hidden { display: none; }
.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;
}