/* style.css */
/* Core styling rules for the TES YouTube Companion Dashboard */

:root {
    --bg-primary: #0f0f12;
    --bg-secondary: #1a1a1f;
    --bg-tertiary: #25252e;
    --border-color: #2a2a35;
    
    --text-primary: #f8fafc;
    --text-secondary: #94a3b8;
    --text-muted: #64748b;
    
    --color-purple: #a855f7;
    --color-indigo: #6366f1;
    --color-green: #10b981;
    --color-amber: #f59e0b;
    --color-red: #ef4444;
}

body {
    margin: 0;
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
    background-color: var(--bg-primary);
    color: var(--text-primary);
    -webkit-font-smoothing: antialiased;
}

/* Header & Nav */
.header-nav {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 16px 32px;
    background-color: var(--bg-secondary);
    border-bottom: 1px solid var(--border-color);
}

.logo-section {
    display: flex;
    align-items: center;
    gap: 12px;
}

.logo-text {
    font-size: 18px;
    font-weight: 800;
    background: linear-gradient(135deg, var(--color-purple), var(--color-indigo));
    -webkit-background-clip: text;
    -webkit-text-fill-color: transparent;
    letter-spacing: 0.5px;
}

.nav-links {
    display: flex;
    gap: 24px;
}

.nav-btn {
    background: none;
    border: none;
    color: var(--text-secondary);
    font-size: 14px;
    font-weight: 500;
    cursor: pointer;
    padding: 8px 12px;
    border-radius: 6px;
    transition: all 0.2s;
}

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

/* Layout container */
.main-container {
    max-width: 1200px;
    margin: 32px auto;
    padding: 0 24px;
}

/* Card layout */
.card {
    background-color: var(--bg-secondary);
    border: 1px solid var(--border-color);
    border-radius: 12px;
    padding: 24px;
    margin-bottom: 24px;
    box-shadow: 0 4px 6px -1px rgba(0, 0, 0, 0.1), 0 2px 4px -1px rgba(0, 0, 0, 0.06);
}

.card-title {
    margin-top: 0;
    margin-bottom: 16px;
    font-size: 18px;
    font-weight: 700;
    border-bottom: 1px solid var(--border-color);
    padding-bottom: 12px;
}

/* Inputs & Form controls */
.form-label {
    display: block;
    font-size: 13px;
    font-weight: 600;
    color: var(--text-secondary);
    margin-bottom: 8px;
}

.form-input, .form-textarea {
    width: 100%;
    box-sizing: border-box;
    padding: 10px 14px;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    color: var(--text-primary);
    font-family: inherit;
    font-size: 14px;
    outline: none;
    transition: border-color 0.2s;
}

.form-input:focus, .form-textarea:focus {
    border-color: var(--color-purple);
}

.form-textarea {
    resize: vertical;
    min-height: 120px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 10px 18px;
    font-size: 14px;
    font-weight: 600;
    border-radius: 8px;
    border: none;
    cursor: pointer;
    transition: all 0.2s;
}

.btn-primary {
    background: linear-gradient(135deg, var(--color-purple), var(--color-indigo));
    color: white;
}

.btn-primary:hover {
    opacity: 0.9;
}

.btn-secondary {
    background-color: var(--bg-tertiary);
    color: var(--text-primary);
    border: 1px solid var(--border-color);
}

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

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

.btn-danger:hover {
    opacity: 0.9;
}

/* Grid & Utilities */
.grid-2 {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 24px;
}

.text-success { color: var(--color-green); }
.text-warning { color: var(--color-amber); }
.text-danger { color: var(--color-red); }

/* Diff / Preview styling */
.diff-container {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    background-color: var(--bg-primary);
    border: 1px solid var(--border-color);
    border-radius: 8px;
    padding: 16px;
    font-family: monospace;
    font-size: 12px;
    white-space: pre-wrap;
    overflow-x: auto;
}

.diff-column {
    padding: 12px;
    border-radius: 6px;
}

.diff-old {
    background-color: rgba(239, 68, 68, 0.1);
    border: 1px solid rgba(239, 68, 68, 0.2);
}

.diff-new {
    background-color: rgba(16, 185, 129, 0.1);
    border: 1px solid rgba(16, 185, 129, 0.2);
}