/* ===========================================
   Auto Clustering Tool - Dark Mode
   Brand: Prosperity Media Australia
   Colors: #01d081 (green), #232d33 (dark), #c90f3c (red), #abb8c3 (gray)
   =========================================== */

/* --- Base & Typography --- */
:root {
    --pm-green: #01d081;
    --pm-green-light: #33dda0;
    --pm-green-dark: #00a868;
    --pm-red: #c90f3c;
    --pm-red-light: #e83a68;

    /* Dark mode surfaces */
    --bg-base: #0d1117;
    --bg-surface: #161b22;
    --bg-elevated: #1c2128;
    --bg-overlay: #21262d;
    --bg-input: #0d1117;

    /* Dark mode borders */
    --border-default: #30363d;
    --border-muted: #21262d;
    --border-subtle: rgba(240,246,252,0.04);

    /* Dark mode text */
    --text-primary: #e6edf3;
    --text-secondary: #8b949e;
    --text-muted: #6e7681;
    --text-on-green: #fff;

    /* Shared tokens */
    --pm-radius: 12px;
    --pm-radius-sm: 8px;
    --pm-radius-lg: 16px;
    --pm-shadow: 0 1px 3px rgba(0,0,0,0.2), 0 4px 12px rgba(0,0,0,0.15);
    --pm-shadow-hover: 0 4px 16px rgba(0,0,0,0.25), 0 8px 32px rgba(0,0,0,0.2);
    --pm-shadow-elevated: 0 8px 24px rgba(0,0,0,0.3), 0 16px 48px rgba(0,0,0,0.2);
    --pm-transition: 0.25s cubic-bezier(0.4, 0, 0.2, 1);
}

body {
    font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, sans-serif;
    background-color: var(--bg-base);
    color: var(--text-primary);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* --- Header --- */
header {
    background: var(--bg-surface) !important;
    box-shadow: 0 4px 20px rgba(0,0,0,0.3);
    position: relative;
    overflow: hidden;
    border-top: 3px solid var(--pm-green);
    border-bottom: 1px solid var(--border-default);
}

header::before {
    content: '';
    position: absolute;
    top: -50%;
    right: -10%;
    width: 300px;
    height: 300px;
    background: radial-gradient(circle, rgba(1,208,129,0.06) 0%, transparent 70%);
    pointer-events: none;
}

header h1 {
    font-weight: 700;
    letter-spacing: -0.02em;
    font-size: 1.6rem;
    color: #fff;
}

header p {
    opacity: 0.6;
    font-size: 0.95rem;
    font-weight: 400;
    color: var(--text-secondary);
}

/* --- Cards --- */
.card {
    border: 1px solid var(--border-default);
    border-radius: var(--pm-radius-lg);
    box-shadow: var(--pm-shadow);
    margin-bottom: 1.5rem;
    overflow: hidden;
    background: var(--bg-surface);
    transition: box-shadow var(--pm-transition);
}

.card:hover {
    box-shadow: var(--pm-shadow-hover);
}

.card-header {
    background: var(--bg-elevated) !important;
    border-bottom: 1px solid var(--border-default);
    padding: 1.15rem 1.5rem;
}

.card-header h5 {
    font-weight: 600;
    font-size: 1rem;
    color: var(--text-primary);
    letter-spacing: -0.01em;
}

.card-header h5 i {
    color: var(--pm-green);
}

.card-body {
    padding: 1.5rem;
}

/* --- Alert overrides --- */
.alert-info {
    background: rgba(1,208,129,0.08);
    border: 1px solid rgba(1,208,129,0.15);
    color: var(--text-primary);
    border-radius: var(--pm-radius-sm);
}

.alert-info i {
    color: var(--pm-green);
}

.alert-light {
    background: var(--bg-overlay);
    border-color: var(--border-default);
    color: var(--text-secondary);
}

/* --- Upload Area --- */
.upload-area {
    transition: all var(--pm-transition);
    cursor: pointer;
    background: var(--bg-base);
    border: 2px dashed var(--border-default) !important;
    border-radius: var(--pm-radius-lg) !important;
    padding: 2.5rem !important;
}

.upload-area:hover {
    background: rgba(1,208,129,0.04);
    border-color: var(--pm-green) !important;
    box-shadow: 0 0 0 4px rgba(1,208,129,0.06);
}

.upload-area.dragover {
    background: rgba(1,208,129,0.08);
    border-color: var(--pm-green) !important;
    transform: scale(1.01);
    box-shadow: 0 0 0 6px rgba(1,208,129,0.1);
}

.upload-area i.fa-cloud-upload-alt {
    color: var(--pm-green);
    opacity: 0.6;
    transition: opacity var(--pm-transition), transform var(--pm-transition);
}

.upload-area:hover i.fa-cloud-upload-alt {
    opacity: 1;
    transform: translateY(-2px);
}

.upload-area h4 {
    font-weight: 600;
    font-size: 1.1rem;
    color: var(--text-primary);
    margin-bottom: 0.5rem;
}

.upload-area p {
    font-size: 0.875rem;
    color: var(--text-muted) !important;
}

/* --- Buttons --- */
.btn {
    font-weight: 500;
    letter-spacing: 0.01em;
    transition: all var(--pm-transition);
}

.btn-primary {
    background: var(--pm-green);
    border: none;
    border-radius: 10px;
    padding: 0.7rem 1.75rem;
    font-weight: 600;
    box-shadow: 0 2px 8px rgba(1,208,129,0.2);
    color: #fff;
}

.btn-primary:hover {
    background: var(--pm-green-light);
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(1,208,129,0.3);
}

.btn-primary:active {
    transform: translateY(0);
    box-shadow: 0 1px 4px rgba(1,208,129,0.15);
}

.btn-success {
    background: var(--pm-green);
    border: none;
    border-radius: 10px;
    padding: 0.7rem 1.75rem;
    font-weight: 600;
    color: #fff;
}

.btn-success:hover {
    background: var(--pm-green-light);
    transform: translateY(-1px);
    box-shadow: 0 4px 20px rgba(1,208,129,0.3);
}

.btn-outline-primary {
    color: var(--pm-green);
    border-color: rgba(1,208,129,0.4);
    border-radius: 8px;
    background: transparent;
}

.btn-outline-primary:hover {
    background-color: var(--pm-green);
    border-color: var(--pm-green);
    color: #fff;
}

.btn-outline-danger {
    color: var(--pm-red-light);
    border-color: rgba(201,15,60,0.3);
}

.btn-outline-danger:hover {
    background: var(--pm-red);
    border-color: var(--pm-red);
    color: #fff;
}

.btn-light {
    background: var(--bg-overlay);
    border: 1px solid var(--border-default);
    color: var(--text-primary);
}

.btn-light:hover {
    background: var(--border-default);
    color: var(--text-primary);
}

.btn-lg {
    padding: 0.75rem 2rem;
    font-size: 1rem;
    border-radius: 10px;
}

/* --- Form Controls --- */
.form-label {
    font-weight: 500;
    font-size: 0.875rem;
    color: var(--text-secondary);
    margin-bottom: 0.4rem;
}

.form-control, .form-select {
    border-radius: var(--pm-radius-sm);
    border: 1.5px solid var(--border-default);
    padding: 0.6rem 0.85rem;
    font-size: 0.9rem;
    transition: border-color var(--pm-transition), box-shadow var(--pm-transition);
    background-color: var(--bg-input);
    color: var(--text-primary);
}

.form-control:focus, .form-select:focus {
    border-color: var(--pm-green);
    box-shadow: 0 0 0 3px rgba(1,208,129,0.12);
    background-color: var(--bg-input);
    color: var(--text-primary);
}

.form-select {
    background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 16 16'%3e%3cpath fill='none' stroke='%238b949e' stroke-linecap='round' stroke-linejoin='round' stroke-width='2' d='m2 5 6 6 6-6'/%3e%3c/svg%3e");
}

.form-text {
    font-size: 0.78rem;
    color: var(--text-muted);
    margin-top: 0.3rem;
}

/* Text muted override */
.text-muted {
    color: var(--text-muted) !important;
}

/* --- Statistics Cards --- */
.stat-card {
    text-align: center;
    transition: transform var(--pm-transition), box-shadow var(--pm-transition);
    margin-bottom: 1rem;
    border-radius: var(--pm-radius) !important;
    position: relative;
    overflow: hidden;
    border: 1px solid var(--border-default);
}

.stat-card::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    right: 0;
    bottom: 0;
    background: linear-gradient(135deg, rgba(255,255,255,0.05) 0%, transparent 60%);
    pointer-events: none;
}

.stat-card:hover {
    transform: translateY(-3px);
    box-shadow: var(--pm-shadow-elevated);
}

.stat-card i {
    opacity: 0.5;
    margin-bottom: 0.5rem;
    display: block;
}

.stat-card h3 {
    margin: 0.4rem 0;
    font-weight: 700;
    font-size: 1.5rem;
    letter-spacing: -0.02em;
}

.stat-card p {
    margin: 0;
    font-size: 0.8rem;
    opacity: 0.75;
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 0.03em;
}

/* --- Progress Section --- */
.progress {
    height: 1.5rem;
    border-radius: 10px;
    background-color: var(--bg-overlay);
    overflow: hidden;
    border: 1px solid var(--border-muted);
}

.progress-bar {
    border-radius: 10px;
    background: linear-gradient(90deg, var(--pm-green) 0%, var(--pm-green-light) 100%);
    transition: width 0.4s ease;
    font-weight: 600;
    font-size: 0.8rem;
    color: #fff;
}

#progressText {
    color: var(--text-primary);
}

/* --- Step Indicators --- */
.step-indicator {
    display: flex;
    flex-direction: column;
    align-items: center;
    flex: 1;
    position: relative;
}

.step-indicator::after {
    content: '';
    position: absolute;
    top: 16px;
    left: 50%;
    width: 100%;
    height: 2px;
    background-color: var(--border-default);
    z-index: 0;
    transition: background-color var(--pm-transition);
}

.step-indicator:last-child::after {
    display: none;
}

.step-circle {
    width: 34px;
    height: 34px;
    border-radius: 50%;
    background-color: var(--bg-overlay);
    color: var(--text-muted);
    display: flex;
    align-items: center;
    justify-content: center;
    font-weight: 700;
    font-size: 0.8rem;
    z-index: 1;
    transition: all var(--pm-transition);
    border: 2px solid var(--border-default);
}

.step-indicator.active .step-circle {
    background-color: var(--pm-green);
    color: white;
    border-color: rgba(1,208,129,0.4);
    box-shadow: 0 0 0 5px rgba(1,208,129,0.12);
    animation: stepPulse 2s ease-in-out infinite;
}

.step-indicator.completed .step-circle {
    background-color: var(--pm-green-dark);
    color: white;
    border-color: var(--pm-green-dark);
}

.step-indicator.completed::after {
    background-color: var(--pm-green-dark);
}

.step-indicator small {
    margin-top: 0.5rem;
    font-size: 0.7rem;
    color: var(--text-muted);
    text-align: center;
    font-weight: 500;
}

.step-indicator.active small {
    color: var(--pm-green);
    font-weight: 600;
}

.step-indicator.completed small {
    color: var(--pm-green-dark);
}

@keyframes stepPulse {
    0%, 100% { transform: scale(1); }
    50% { transform: scale(1.08); }
}

/* --- Topic Cards --- */
.topic-card {
    border: 1px solid var(--border-default);
    border-radius: var(--pm-radius);
    margin-bottom: 1rem;
    transition: all var(--pm-transition);
    background: var(--bg-surface);
    overflow: hidden;
}

.topic-card:hover {
    box-shadow: var(--pm-shadow-hover);
    transform: translateY(-2px);
    border-color: rgba(1,208,129,0.2);
}

.topic-header {
    background: var(--bg-elevated);
    color: white;
    padding: 1rem 1.25rem;
    border-bottom: 1px solid var(--border-default);
    border-left: 3px solid var(--pm-green);
}

.topic-header h6 {
    font-size: 0.75rem;
    font-weight: 500;
    opacity: 0.6;
    text-transform: uppercase;
    letter-spacing: 0.05em;
    color: var(--pm-green);
}

.topic-header h5 {
    font-weight: 700;
    font-size: 1.05rem;
    letter-spacing: -0.01em;
    line-height: 1.3;
    color: var(--text-primary);
}

.topic-body {
    padding: 1.15rem 1.25rem;
}

.topic-body strong {
    color: var(--text-secondary);
}

.keyword-tag {
    display: inline-block;
    background-color: var(--bg-overlay);
    color: var(--text-secondary);
    padding: 0.2rem 0.65rem;
    margin: 0.15rem;
    border-radius: 20px;
    font-size: 0.8rem;
    border: 1px solid var(--border-default);
    font-weight: 450;
    transition: all var(--pm-transition);
}

.keyword-tag:hover {
    background-color: rgba(1,208,129,0.1);
    border-color: rgba(1,208,129,0.3);
    color: var(--pm-green-light);
}

.keywords-container {
    max-height: 160px;
    overflow-y: auto;
    scrollbar-width: thin;
    scrollbar-color: var(--border-default) transparent;
}

.keywords-container::-webkit-scrollbar {
    width: 4px;
}

.keywords-container::-webkit-scrollbar-thumb {
    background: var(--border-default);
    border-radius: 4px;
}

/* --- Cluster Statistics --- */
.cluster-stats {
    background: var(--bg-base);
    border-radius: var(--pm-radius-sm);
    padding: 0.75rem 1rem;
    font-size: 0.85rem;
    border: 1px solid var(--border-muted);
}

.cluster-stats .stat-item {
    padding: 3px 0;
    display: flex;
    align-items: center;
    color: var(--text-secondary);
}

.cluster-stats .stat-item i {
    color: var(--pm-green);
    width: 20px;
    font-size: 0.8rem;
}

.cluster-stats .stat-item strong {
    margin-right: 4px;
    color: var(--text-primary);
}

/* --- Chart --- */
.chart-container {
    background: var(--bg-elevated);
    border-radius: var(--pm-radius);
    padding: 1.25rem;
    border: 1px solid var(--border-default);
}

/* --- Cost Estimation Card --- */
.card.border-info {
    border-color: var(--border-default) !important;
}

.card-header.bg-info {
    background: var(--bg-elevated) !important;
    border-bottom: 1px solid var(--border-default);
}

.card-header.bg-info h5 {
    color: var(--text-primary) !important;
}

/* Cost estimation text colors */
#estKeywordCount {
    color: var(--pm-green) !important;
}

.text-success {
    color: var(--pm-green-light) !important;
}

.text-warning {
    color: #d29922 !important;
}

/* --- Loading Animation --- */
@keyframes pulse {
    0% { opacity: 1; }
    50% { opacity: 0.5; }
    100% { opacity: 1; }
}

.loading {
    animation: pulse 2s infinite;
}

/* --- Selected File Alert --- */
.selected-file .alert {
    margin-bottom: 0;
    padding: 0.75rem 1rem;
    border-radius: var(--pm-radius-sm);
}

/* --- Error Section --- */
.alert-danger {
    border-radius: var(--pm-radius-sm);
    border: 1px solid rgba(201,15,60,0.25);
    background: rgba(201,15,60,0.1);
    color: var(--text-primary);
}

.alert-danger strong {
    color: var(--pm-red-light);
}

.alert-warning {
    background: rgba(210,153,34,0.1);
    border-color: rgba(210,153,34,0.25);
    color: var(--text-primary);
}

/* --- Images --- */
img {
    max-width: 100%;
    height: auto;
    border-radius: var(--pm-radius-sm);
}

/* --- Footer --- */
footer {
    border-top: 1px solid var(--border-default);
    background-color: var(--bg-surface) !important;
}

footer p {
    font-size: 0.875rem;
    color: var(--text-muted);
}

/* --- Bootstrap Color Overrides (Brand + Dark) --- */
.bg-primary {
    background-color: var(--pm-green) !important;
}

.bg-light {
    background-color: var(--bg-elevated) !important;
}

.text-primary {
    color: var(--pm-green) !important;
}

.text-white {
    color: #fff !important;
}

.border-primary {
    border-color: var(--pm-green) !important;
}

.bg-info {
    background-color: var(--bg-elevated) !important;
}

.bg-secondary {
    background-color: var(--bg-overlay) !important;
}

.bg-success {
    background-color: rgba(1,208,129,0.15) !important;
}

.bg-warning {
    background-color: rgba(210,153,34,0.15) !important;
}

/* Stat card specific bg overrides for dark mode - left accent border style */
.stat-card.bg-primary {
    background: var(--bg-surface) !important;
    border-color: var(--border-default);
    border-left: 4px solid var(--pm-green) !important;
}

.stat-card.bg-success {
    background: var(--bg-surface) !important;
    border-color: var(--border-default);
    border-left: 4px solid var(--pm-green-dark) !important;
}

.stat-card.bg-info {
    background: var(--bg-surface) !important;
    border-color: var(--border-default);
    border-left: 4px solid #8b949e !important;
}

.stat-card.bg-secondary {
    background: var(--bg-surface) !important;
    border-color: var(--border-default);
    border-left: 4px solid var(--border-default) !important;
}

.stat-card.bg-warning {
    background: var(--bg-surface) !important;
    border-color: var(--border-default);
    border-left: 4px solid #d29922 !important;
}

/* Stat card text colors in dark mode */
.stat-card.bg-primary, .stat-card.bg-success, .stat-card.bg-info,
.stat-card.bg-secondary, .stat-card.bg-warning {
    color: var(--text-primary) !important;
}

.stat-card.bg-primary h3 { color: var(--pm-green) !important; }
.stat-card.bg-success h3 { color: var(--pm-green-dark) !important; }
.stat-card.bg-info h3 { color: #8b949e !important; }
.stat-card.bg-warning h3 { color: #d29922 !important; }

.stat-card.bg-primary p, .stat-card.bg-success p, .stat-card.bg-info p,
.stat-card.bg-secondary p, .stat-card.bg-warning p {
    color: var(--text-secondary) !important;
    opacity: 1;
}

.badge.bg-success {
    background-color: rgba(1,208,129,0.15) !important;
    color: var(--pm-green) !important;
    font-size: 0.7rem;
    vertical-align: middle;
    font-weight: 500;
    letter-spacing: 0.02em;
    border-radius: 6px;
    padding: 0.3em 0.6em;
    border: 1px solid rgba(1,208,129,0.2);
}

/* --- Responsive --- */
@media (max-width: 768px) {
    .stat-card {
        margin-bottom: 0.75rem;
    }

    .stat-card h3 {
        font-size: 1.2rem;
    }

    .topic-card {
        margin-bottom: 0.75rem;
    }

    .btn-lg {
        padding: 0.6rem 1.5rem;
        font-size: 0.95rem;
    }

    header h1 {
        font-size: 1.3rem;
    }

    .chart-container {
        height: 250px !important;
    }

    .upload-area {
        padding: 1.5rem !important;
    }

    .upload-area h4 {
        font-size: 1rem;
    }

    .step-indicator small {
        font-size: 0.6rem;
    }

    .step-circle {
        width: 28px;
        height: 28px;
        font-size: 0.7rem;
    }
}

@media (max-width: 576px) {
    .card-body {
        padding: 1rem;
    }

    .card-header {
        padding: 0.85rem 1rem;
    }
}

/* --- Smooth scrolling --- */
html {
    scroll-behavior: smooth;
}

/* --- Selection color --- */
::selection {
    background: rgba(1,208,129,0.25);
    color: #fff;
}

/* --- Headings in results --- */
.card-body h6 {
    color: var(--text-primary);
}

.card-body h6 i {
    color: var(--pm-green);
}

/* --- Tooltip Dark Styling --- */
.tooltip {
    font-family: 'Inter', sans-serif;
    font-size: 0.8rem;
}

.tooltip-inner {
    background: var(--bg-elevated);
    color: var(--text-primary);
    border: 1px solid var(--border-default);
    border-radius: var(--pm-radius-sm);
    padding: 0.5rem 0.75rem;
    max-width: 260px;
    text-align: left;
    box-shadow: var(--pm-shadow);
}

.tooltip .tooltip-arrow::before {
    border-top-color: var(--bg-elevated);
}

.bs-tooltip-bottom .tooltip-arrow::before {
    border-bottom-color: var(--bg-elevated);
}

.bs-tooltip-start .tooltip-arrow::before {
    border-left-color: var(--bg-elevated);
}

.bs-tooltip-end .tooltip-arrow::before {
    border-right-color: var(--bg-elevated);
}

/* Tooltip info icon styling */
.form-label .fa-info-circle {
    font-size: 0.75rem;
    cursor: help;
    opacity: 0.5;
    transition: opacity var(--pm-transition);
}

.form-label:hover .fa-info-circle {
    opacity: 1;
    color: var(--pm-green) !important;
}

/* --- Global Scrollbar Styling --- */
* {
    scrollbar-width: thin;
    scrollbar-color: var(--border-default) transparent;
}

*::-webkit-scrollbar {
    width: 8px;
    height: 8px;
}

*::-webkit-scrollbar-track {
    background: transparent;
}

*::-webkit-scrollbar-thumb {
    background: var(--border-default);
    border-radius: 4px;
}

*::-webkit-scrollbar-thumb:hover {
    background: var(--text-muted);
}

/* --- Advanced Settings Divider --- */
.card-body h6.text-muted {
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-muted);
    margin-bottom: 0.75rem;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

/* --- Plain-language settings help --- */
.quick-start {
    padding: 1rem 1.25rem;
    background: var(--bg-elevated);
    border: 1px solid var(--pm-green-dark);
    border-left: 4px solid var(--pm-green);
    border-radius: 8px;
}

.quick-start h6 {
    color: var(--text-primary);
    font-weight: 600;
}

.quick-start h6 i {
    color: var(--pm-green);
}

.quick-start p,
.quick-start-steps {
    color: var(--text-secondary);
    font-size: 0.9rem;
}

.quick-start-steps {
    padding-left: 1.25rem;
}

.settings-badge {
    font-weight: 600;
    font-size: 0.75rem;
    padding: 0.4rem 0.65rem;
    border: 1px solid transparent;
}

.settings-badge-recommended {
    color: var(--pm-green);
    background: rgba(1, 208, 129, 0.12);
    border-color: var(--pm-green-dark);
}

.settings-badge-custom {
    color: var(--text-primary);
    background: var(--bg-overlay);
    border-color: var(--border-default);
}

.plain-explainer {
    color: var(--text-secondary);
    font-size: 0.9rem;
    line-height: 1.55;
}

.plain-explainer strong {
    color: var(--text-primary);
}

.settings-heading {
    color: var(--text-secondary);
    padding-bottom: 0.5rem;
    border-bottom: 1px solid var(--border-muted);
    margin-bottom: 0.75rem;
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.05em;
}

.form-label .tech-name {
    color: var(--text-muted);
    font-weight: 400;
    font-size: 0.85em;
}

.recommended-value {
    display: block;
    margin-top: 0.25rem;
    color: var(--pm-green);
    font-weight: 600;
}

.setting-note {
    color: var(--text-secondary);
}

.form-control:disabled {
    opacity: 0.5;
    cursor: not-allowed;
}