/* --- 1. CORE THEME & VARIABLES --- */
:root {
    --primary: #2563eb;
    --text: #1e1e1e;
    --light-bg: #f9fafb;
    --border: #e5e7eb;
    --success: #059669; /* For AI labels */
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    line-height: 1.6;
    color: var(--text);
    margin: 0;
    background-color: #f0ecec;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* --- 2. NAVIGATION & HEADER --- */
header {
    border-bottom: 1px solid var(--border);
    padding: 1.5rem 0;
    background: white;
}

nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    font-size: 1.5rem;
    font-weight: bold;
    color: var(--primary);
    text-decoration: none;
}

.nav-links {
    list-style: none;
    display: flex;
    gap: 20px;
    margin: 0;
}

.nav-links a {
    text-decoration: none;
    color: var(--text);
    font-weight: 500;
}

/* --- 3. BLOG POST CARDS --- */
.post-item {
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 20px;
    transition: all 0.3s ease;
    cursor: pointer;
    position: relative;
    top: 0;
}

.post-item:hover {
    top: -5px;
    border-color: var(--primary);
    box-shadow: 0 10px 25px -5px rgba(37, 99, 235, 0.1),
                0 8px 10px -6px rgba(37, 99, 235, 0.1);
}

.post-item:hover h3 a { color: var(--primary); }

/* --- 4. INTERACTIVE DEMO COMPONENT --- */
.interactive-demo {
    width: 100%;
    margin: 2.5rem 0;
    padding: 1.5rem;
    background: #ffffff;
    border: 1px solid var(--border);
    border-radius: 12px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.05);
}

.input-group {
    display: flex;
    gap: 10px;
    margin-bottom: 1rem;
}

.interactive-demo input {
    flex-grow: 1;
    padding: 14px;
    border-radius: 8px;
    border: 1px solid var(--border);
    font-size: 1rem;
    outline: none;
    transition: border-color 0.2s, box-shadow 0.2s;
}

.interactive-demo input:focus {
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(37, 99, 235, 0.1);
}

.interactive-demo button {
    padding: 10px 20px;
    color: white;
    background-color: var(--primary);
    border: none;
    border-radius: 8px;
    cursor: pointer;
    font-weight: 600;
    transition: transform 0.1s, opacity 0.2s;
}

.interactive-demo button:hover:not(:disabled) {
    opacity: 0.9;
    transform: translateY(-1px);
}

.interactive-demo button:disabled {
    background-color: #9ca3af;
    cursor: not-allowed;
}

/* Response Box & Messages */
#responseContainer {
    padding: 1.25rem;
    height: 450px;
    background-color: var(--light-bg);
    color: var(--text);
    border: 1px solid var(--border);
    border-radius: 8px;
    overflow-y: auto;
    font-family: 'Consolas', 'Monaco', monospace;
    font-size: 0.95rem;
    line-height: 1.6;
}

.msg {
    margin-bottom: 1.25rem;
    padding-bottom: 0.75rem;
    border-bottom: 1px solid rgba(0,0,0,0.05);
}

.msg:last-child { border-bottom: none; }

.user-label { color: var(--primary); font-weight: bold; font-size: 0.8rem; text-transform: uppercase; }
.ai-label { color: var(--success); font-weight: bold; font-size: 0.8rem; text-transform: uppercase; }

.msg-text {
    display: block;
    margin-top: 5px;
    white-space: pre-wrap; /* Keeps formatting for lists/code */
}

/* --- 5. ANIMATIONS & LOADERS --- */
#loader {
    display: flex;
    align-items: center;
    gap: 12px;
    padding: 0 0 15px 5px;
    color: var(--primary);
    font-weight: 500;
}

.spinner {
    width: 20px;
    height: 20px;
    border: 3px solid rgba(37, 99, 235, 0.1);
    border-radius: 50%;
    border-top-color: var(--primary);
    animation: spin 0.8s linear infinite;
}

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

/* --- 6. FOOTER --- */
footer {
    text-align: center;
    padding: 3rem 0;
    margin-top: 4rem;
    color: #9ca3af;
    border-top: 1px solid var(--border);
}