/* ===========================
   GLOBAL STYLES & RESET
   =========================== */
   * {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

:root {
    /* Color Palette */
    --primary-color: #FF4500;
    --secondary-color: #0079D3;
    --background: #DAE0E6;
    --card-bg: #FFFFFF;
    --text-primary: #1c1c1c;
    --text-secondary: #7c7c7c;
    --border-color: #ccc;
    --error-color: #ea0027;
    --success-color: #46d160;
    
    /* Spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Shadows */
    --shadow-sm: 0 1px 3px rgba(0,0,0,0.12);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 20px rgba(0,0,0,0.15);
}

body {
    font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
    background-color: var(--background);
    color: var(--text-primary);
    line-height: 1.6;
}

.container {
    max-width: 1400px;
    margin: 0 auto;
    padding: var(--spacing-md);
}

/* ===========================
   HEADER SECTION
   =========================== */
.header {
    text-align: center;
    margin-bottom: var(--spacing-lg);
    padding: var(--spacing-lg) 0;
}

.header h1 {
    font-size: 2.5rem;
    color: var(--primary-color);
    margin-bottom: var(--spacing-xs);
}

.subtitle {
    color: var(--text-secondary);
    font-size: 1.1rem;
}

/* ===========================
   ADD SUBREDDIT SECTION
   =========================== */
.add-subreddit-section {
    background: var(--card-bg);
    padding: var(--spacing-md);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    margin-bottom: var(--spacing-lg);
}

.input-group {
    display: flex;
    gap: var(--spacing-sm);
    margin-bottom: var(--spacing-xs);
}

#subredditInput {
    flex: 1;
    padding: 12px 16px;
    font-size: 1rem;
    border: 2px solid var(--border-color);
    border-radius: 8px;
    outline: none;
    transition: border-color 0.3s;
}

#subredditInput:focus {
    border-color: var(--secondary-color);
}

.btn-primary {
    padding: 12px 24px;
    font-size: 1rem;
    font-weight: 600;
    background-color: var(--primary-color);
    color: white;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    transition: background-color 0.3s, transform 0.1s;
}

.btn-primary:hover {
    background-color: #ff5722;
    transform: translateY(-1px);
}

.btn-primary:active {
    transform: translateY(0);
}

.hint {
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-top: var(--spacing-xs);
}

/* ===========================
   LANES CONTAINER
   =========================== */
.lanes-container {
    display: flex;
    gap: var(--spacing-md);
    overflow-x: auto;
    padding-bottom: var(--spacing-md);
}

/* Custom scrollbar */
.lanes-container::-webkit-scrollbar {
    height: 10px;
}

.lanes-container::-webkit-scrollbar-track {
    background: #f1f1f1;
    border-radius: 10px;
}

.lanes-container::-webkit-scrollbar-thumb {
    background: #888;
    border-radius: 10px;
}

.lanes-container::-webkit-scrollbar-thumb:hover {
    background: #555;
}

/* ===========================
   EMPTY STATE
   =========================== */
.empty-state {
    flex: 1;
    text-align: center;
    padding: var(--spacing-xl) var(--spacing-md);
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow-sm);
}

.empty-icon {
    font-size: 4rem;
    margin-bottom: var(--spacing-sm);
}

.empty-state h3 {
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
}

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

/* ===========================
   SUBREDDIT LANE
   =========================== */
.lane {
    min-width: 350px;
    max-width: 350px;
    background: var(--card-bg);
    border-radius: 12px;
    box-shadow: var(--shadow-md);
    display: flex;
    flex-direction: column;
    max-height: 80vh;
}

.lane-header {
    padding: var(--spacing-md);
    border-bottom: 2px solid var(--background);
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.lane-title {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
}

.lane-title h2 {
    font-size: 1.3rem;
    color: var(--text-primary);
}

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

.btn-icon {
    background: none;
    border: none;
    font-size: 1.2rem;
    cursor: pointer;
    padding: var(--spacing-xs);
    border-radius: 6px;
    transition: background-color 0.2s;
}

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

.lane-content {
    flex: 1;
    overflow-y: auto;
    padding: var(--spacing-sm);
}

.lane-content::-webkit-scrollbar {
    width: 8px;
}

.lane-content::-webkit-scrollbar-track {
    background: transparent;
}

.lane-content::-webkit-scrollbar-thumb {
    background: #ccc;
    border-radius: 4px;
}

.lane-content::-webkit-scrollbar-thumb:hover {
    background: #999;
}

/* ===========================
   LOADING & ERROR STATES
   =========================== */
.loading {
    text-align: center;
    padding: var(--spacing-lg);
}

.spinner {
    border: 4px solid var(--background);
    border-top: 4px solid var(--primary-color);
    border-radius: 50%;
    width: 40px;
    height: 40px;
    animation: spin 1s linear infinite;
    margin: 0 auto var(--spacing-sm);
}

@keyframes spin {
    0% { transform: rotate(0deg); }
    100% { transform: rotate(360deg); }
}

.error-message {
    background-color: #ffebee;
    color: var(--error-color);
    padding: var(--spacing-md);
    border-radius: 8px;
    text-align: center;
}

/* ===========================
   POST CARD
   =========================== */
.post-card {
    background: var(--card-bg);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: var(--spacing-md);
    margin-bottom: var(--spacing-sm);
    transition: transform 0.2s, box-shadow 0.2s;
    cursor: pointer;
}

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

.post-votes {
    display: flex;
    align-items: center;
    gap: var(--spacing-xs);
    color: var(--text-secondary);
    font-size: 0.9rem;
    margin-bottom: var(--spacing-xs);
}

.post-votes span {
    font-weight: 600;
}

.post-title {
    font-size: 1.05rem;
    font-weight: 600;
    color: var(--text-primary);
    margin-bottom: var(--spacing-xs);
    line-height: 1.4;
}

.post-meta {
    display: flex;
    justify-content: space-between;
    align-items: center;
    font-size: 0.85rem;
    color: var(--text-secondary);
    margin-top: var(--spacing-xs);
}

.post-author {
    font-weight: 500;
}

.post-comments {
    display: flex;
    align-items: center;
    gap: 4px;
}

/* ===========================
   RESPONSIVE DESIGN
   =========================== */
@media (max-width: 768px) {
    .header h1 {
        font-size: 1.8rem;
    }
    
    .input-group {
        flex-direction: column;
    }
    
    .lane {
        min-width: 300px;
        max-width: 300px;
    }
}

@media (max-width: 480px) {
    .container {
        padding: var(--spacing-sm);
    }
    
    .lane {
        min-width: 280px;
        max-width: 280px;
    }
}