/* Base Tailwind-like styles */
:root {
    --color-gray-900: #111827;
    --color-gray-800: #1f2937;
    --color-gray-700: #374151;
    --color-gray-600: #4B5563;
    --color-gray-500: #6B7280;
    --color-gray-400: #9CA3AF;
    --color-gray-300: #D1D5DB;
    --color-gray-200: #E5E7EB;
    --color-gray-100: #F3F4F6;
    --color-gray-50: #F9FAFB;
    
    --color-blue-900: #1E3A8A;
    --color-blue-800: #1E40AF;
    --color-blue-700: #1D4ED8;
    --color-blue-600: #2563EB;
    --color-blue-500: #3B82F6;
    --color-blue-400: #60A5FA;
    --color-blue-300: #93C5FD;
    --color-blue-200: #BFDBFE;
    --color-blue-100: #DBEAFE;
    --color-blue-50: #EFF6FF;
    
    --color-yellow-50: #FFFBEB;
    --color-yellow-100: #FEF3C7;
}

/* Global Styles */
.stApp {
    background-color: var(--color-gray-900);
    color: white;
}

/* Main header */
.main-header {
    background-color: black;
    padding: 1rem;
    border-bottom: 1px solid var(--color-gray-700);
}

.title-text {
    font-size: 1.5rem;
    font-weight: bold;
    color: white;
}

/* Content containers */
.content-container {
    background-color: var(--color-gray-800);
    border-radius: 0.75rem;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.2);
    color: white;
}

.blue-container {
    background-color: var(--color-blue-100);
    color: var(--color-gray-900);
    border-radius: 0.75rem;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

.yellow-container {
    background-color: var(--color-yellow-50);
    color: var(--color-gray-900);
    border-radius: 0.75rem;
    padding: 1.5rem;
    margin-bottom: 1.5rem;
}

/* Card grid styles */
.card-grid {
    display: grid;
    grid-template-columns: repeat(1, 1fr);
    gap: 1.5rem;
    margin-bottom: 1.5rem;
}

@media (min-width: 768px) {
    .card-grid {
        grid-template-columns: repeat(3, 1fr);
    }
}

.card {
    background-color: var(--color-gray-700);
    border-radius: 0.5rem;
    padding: 1rem;
    color: white;
}

/* Special containers */
.key-concept {
    background-color: var(--color-gray-700);
    border-radius: 0.5rem;
    padding: 0.75rem;
    margin: 1rem 0;
    border-left: 3px solid var(--color-blue-500);
    color: white;
}

.research-question {
    background-color: var(--color-blue-900);
    border-radius: 0.5rem;
    padding: 0.75rem;
    margin: 1rem 0;
    border-left: 3px solid var(--color-blue-400);
    color: white;
}

.quote-container {
    font-style: italic;
    color: var(--color-gray-300);
    padding: 0.5rem 1rem;
    border-left: 3px solid var(--color-gray-600);
    margin: 1rem 0;
}

/* Navigation */
.nav-container {
    position: fixed;
    bottom: 0;
    left: 0;
    width: 100%;
    background-color: black;
    border-top: 1px solid var(--color-gray-700);
    padding: 0.75rem 1rem;
    display: flex;
    justify-content: space-between;
    z-index: 1000;
}

.nav-buttons {
    display: flex;
    gap: 0.5rem;
}

.prev-button {
    background-color: var(--color-gray-700);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 0.25rem;
    border: none;
    cursor: pointer;
}

.prev-button:hover {
    background-color: var(--color-gray-600);
}

.next-button {
    background-color: var(--color-blue-600);
    color: white;
    padding: 0.5rem 1rem;
    border-radius: 0.25rem;
    border: none;
    cursor: pointer;
}

.next-button:hover {
    background-color: var(--color-blue-700);
}

.nav-dots {
    display: none;
}

@media (min-width: 768px) {
    .nav-dots {
        display: flex;
        gap: 0.25rem;
    }
}

.nav-dot {
    width: 2rem;
    height: 2rem;
    display: flex;
    align-items: center;
    justify-content: center;
    color: var(--color-gray-300);
    border-radius: 0.25rem;
    text-decoration: none;
    font-size: 0.875rem;
}

.nav-dot:hover {
    background-color: var(--color-gray-800);
}

.nav-dot.active {
    background-color: var(--color-blue-800);
    color: white;
    font-weight: 500;
}

/* Override Streamlit Styles */
.stTextInput > div > div > input {
    background-color: var(--color-gray-700);
    color: white;
}

.stSelectbox > div > div > div {
    background-color: var(--color-gray-700);
    color: white;
}

.stCheckbox > div > label {
    color: white;
}

/* Button styling */
.stButton > button {
    background-color: var(--color-blue-600);
    color: white;
}

.stButton > button:hover {
    background-color: var(--color-blue-700);
}

/* Sidebars */
[data-testid="stSidebar"] {
    background-color: var(--color-gray-900);
}

[data-testid="stSidebar"] .stMarkdown {
    color: white;
}

/* Module card styles */
.module-card {
    background-color: var(--color-gray-800);
    border-radius: 0.5rem;
    padding: 1rem;
    margin-bottom: 1rem;
    border-top: 4px solid var(--color-blue-500);
    transition: transform 0.2s;
}

.module-card:hover {
    transform: translateY(-3px);
    box-shadow: 0 4px 8px rgba(0, 0, 0, 0.2);
}

.module-number {
    background-color: var(--color-blue-500);
    color: white;
    font-weight: bold;
    padding: 0.25rem 0.5rem;
    border-radius: 1rem;
    font-size: 0.9rem;
    display: inline-block;
    margin-bottom: 0.5rem;
}

.module-title {
    font-weight: 600;
    margin-bottom: 0.5rem;
    font-size: 1.1rem;
}

/* Add space at bottom for fixed nav */
.main-content {
    padding-bottom: 4rem;
}

/* Tool container styles */
.tool-container {
    background-color: var(--color-gray-800);
    color: white;
    padding: 1.5rem;
    border-radius: 0.5rem;
    border: 1px solid var(--color-gray-700);
    margin-bottom: 1.5rem;
}

/* Upload container */
.upload-container {
    border: 2px dashed var(--color-gray-600);
    padding: 1.5rem;
    text-align: center;
    border-radius: 0.5rem;
    margin-bottom: 1rem;
    background-color: var(--color-gray-700);
}

/* Footer spacing */
.footer-spacer {
    height: 4rem;
}

/* Tabs */
.stTabs [data-baseweb="tab"] {
    color: white;
}

.stTabs [data-baseweb="tab-highlight"] {
    background-color: var(--color-blue-600);
}