/**
 * M2M Portal — Unified Design Token System & Responsive Stylesheet
 * Aligned with Nippon Paint Corporate Identity and Desktop App (NipponTheme.xaml)
 */

:root {
    /* Surface & Canvas Tokens */
    --bg-canvas: #F8FAFC;
    --bg-card: #FFFFFF;
    --bg-subtle: #F1F5F9;
    --bg-topbar: #0F172A;

    /* Primary: Nippon Navy */
    --primary: #1B365D;
    --primary-hover: #132744;
    --primary-soft: #EFF6FF;

    /* Accent: Nippon Red */
    --accent: #E11D48;
    --accent-hover: #BE123C;
    --accent-soft: #FFF1F2;

    /* Typography Tokens */
    --text-main: #0F172A;
    --text-sub: #475569;
    --text-muted: #64748B;

    /* Borders & Dividers */
    --border: #E2E8F0;
    --border-strong: #CBD5E1;

    /* Status Colors */
    --success: #15803D;
    --success-soft: #DCFCE7;
    --success-border: #86EFAC;

    --warning: #B45309;
    --warning-soft: #FEF3C7;
    --warning-border: #FDE68A;

    --danger: #B91C1C;
    --danger-soft: #FEE2E2;
    --danger-border: #FECACA;

    --info: #1D4ED8;
    --info-soft: #DBEAFE;
    --info-border: #BFDBFE;

    /* Shadows & Transitions */
    --shadow-sm: 0 1px 2px rgba(15, 23, 42, 0.05);
    --shadow-md: 0 4px 6px -1px rgba(15, 23, 42, 0.07), 0 2px 4px -2px rgba(15, 23, 42, 0.05);
    --shadow-lg: 0 10px 15px -3px rgba(15, 23, 42, 0.08), 0 4px 6px -4px rgba(15, 23, 42, 0.04);
    --radius-sm: 6px;
    --radius-md: 8px;
    --radius-lg: 12px;
    --radius-full: 9999px;
    --transition: all 0.15s cubic-bezier(0.4, 0, 0.2, 1);
}

/* Base Reset & Typography */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    font-size: 14px;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, "Helvetica Neue", Arial, sans-serif;
    background-color: var(--bg-canvas);
    color: var(--text-main);
    line-height: 1.55;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
    min-height: 100vh;
}

::selection {
    background-color: var(--accent-soft);
    color: var(--accent);
}

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

::-webkit-scrollbar-track {
    background: var(--bg-subtle);
}

::-webkit-scrollbar-thumb {
    background: var(--border-strong);
    border-radius: var(--radius-full);
}

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

/* Headings */
h1, h2, h3, h4, h5, h6 {
    color: var(--text-main);
    font-weight: 700;
    line-height: 1.3;
}

h1 {
    font-size: 1.75rem;
    letter-spacing: -0.02em;
}

h2 {
    font-size: 1.25rem;
    letter-spacing: -0.01em;
}

h3 {
    font-size: 1.05rem;
}

p.sub, .sub {
    font-size: 0.92rem;
    color: var(--text-sub);
    line-height: 1.5;
}

code, .mono {
    font-family: ui-monospace, SFMono-Regular, Menlo, Monaco, Consolas, "Liberation Mono", "Courier New", monospace;
    font-size: 0.88em;
}

/* Topbar Header */
.topbar {
    background-color: var(--bg-topbar);
    color: #FFFFFF;
    padding: 12px 28px;
    display: flex;
    align-items: center;
    justify-content: space-between;
    border-bottom: 1px solid #1E293B;
    position: sticky;
    top: 0;
    z-index: 100;
    box-shadow: 0 2px 4px rgba(0, 0, 0, 0.15);
}

.brand {
    display: flex;
    align-items: center;
    gap: 14px;
    text-decoration: none;
    color: inherit;
}

.brand-logo-box {
    padding: 6px 10px;
    border-radius: var(--radius-md);
    background: #FFFFFF;
    border: 1px solid var(--border);
    display: inline-flex;
    align-items: center;
    justify-content: center;
    box-shadow: var(--shadow-sm);
}

.brand-logo-img {
    height: 28px;
    width: auto;
    display: block;
}

.brand-title {
    font-weight: 700;
    font-size: 1.15rem;
    letter-spacing: 0.01em;
    color: #FFFFFF;
}

.brand-sub {
    font-size: 0.85rem;
    color: #94A3B8;
    margin-top: 1px;
}

.nav-actions {
    display: flex;
    align-items: center;
    gap: 10px;
}

/* Layout Containers */
.container {
    max-width: 1360px;
    margin: 0 auto;
    padding: 24px 24px 60px;
}

/* Card Component */
.card {
    background-color: var(--bg-card);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 22px;
    box-shadow: var(--shadow-sm);
    margin-bottom: 20px;
}

/* Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    gap: 7px;
    min-height: 38px;
    padding: 8px 16px;
    border-radius: var(--radius-md);
    font-size: 0.92rem;
    font-weight: 600;
    text-decoration: none;
    cursor: pointer;
    border: 1px solid transparent;
    transition: var(--transition);
    white-space: nowrap;
    user-select: none;
}

.btn:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

.btn-primary {
    background-color: var(--primary);
    color: #FFFFFF;
    border-color: var(--primary);
}

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

.btn-accent {
    background-color: var(--accent);
    color: #FFFFFF;
    border-color: var(--accent);
}

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

.btn-secondary {
    background-color: #FFFFFF;
    color: var(--text-main);
    border-color: var(--border-strong);
}

.btn-secondary:hover {
    background-color: var(--bg-subtle);
    border-color: var(--text-muted);
}

.btn-outline {
    background-color: transparent;
    color: #E2E8F0;
    border-color: #475569;
}

.btn-outline:hover {
    background-color: #1E293B;
    border-color: #64748B;
    color: #FFFFFF;
}

.btn-success {
    background-color: var(--success);
    color: #FFFFFF;
    border-color: var(--success);
}

.btn-success:hover {
    background-color: #166534;
    border-color: #166534;
}

.btn-danger {
    background-color: var(--danger);
    color: #FFFFFF;
    border-color: var(--danger);
}

.btn-danger:hover {
    background-color: #991B1B;
    border-color: #991B1B;
}

.btn:disabled {
    opacity: 0.6;
    cursor: not-allowed;
}

/* Chip Buttons */
.chips {
    display: flex;
    flex-wrap: wrap;
    gap: 8px;
    margin-bottom: 16px;
}

.chip {
    display: inline-flex;
    align-items: center;
    gap: 5px;
    min-height: 36px;
    padding: 6px 14px;
    border-radius: var(--radius-full);
    font-family: inherit;
    font-size: 0.85rem;
    font-weight: 600;
    background-color: var(--bg-subtle);
    color: var(--text-sub);
    border: 1px solid var(--border);
    cursor: pointer;
    transition: var(--transition);
}

.chip:hover {
    background-color: var(--accent-soft);
    color: var(--accent);
    border-color: #FDA4AF;
}

.chip:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Badges & Status Pills */
.badge {
    display: inline-flex;
    align-items: center;
    gap: 4px;
    padding: 3px 9px;
    border-radius: var(--radius-sm);
    font-size: 0.78rem;
    font-weight: 700;
    line-height: 1.3;
}

.badge-green {
    background-color: var(--success-soft);
    color: var(--success);
    border: 1px solid var(--success-border);
}

.badge-red {
    background-color: var(--danger-soft);
    color: var(--danger);
    border: 1px solid var(--danger-border);
}

.badge-blue {
    background-color: var(--info-soft);
    color: var(--info);
    border: 1px solid var(--info-border);
}

.badge-amber {
    background-color: var(--warning-soft);
    color: var(--warning);
    border: 1px solid var(--warning-border);
}

.pill {
    display: inline-flex;
    align-items: center;
    gap: 6px;
    padding: 5px 13px;
    border-radius: var(--radius-full);
    font-size: 0.82rem;
    font-weight: 600;
}

.pill-ok {
    background-color: rgba(21, 128, 61, 0.2);
    color: #4ADE80;
    border: 1px solid rgba(74, 222, 128, 0.35);
}

.pill-off {
    background-color: rgba(225, 29, 72, 0.2);
    color: #FDA4AF;
    border: 1px solid rgba(253, 164, 175, 0.35);
}

.pill-user {
    background-color: rgba(255, 255, 255, 0.1);
    color: #E2E8F0;
    border: 1px solid rgba(255, 255, 255, 0.15);
}

/* Alerts */
.alert-ok, .alert-err, .alert-info {
    padding: 13px 18px;
    border-radius: var(--radius-md);
    font-size: 0.92rem;
    font-weight: 600;
    margin-bottom: 18px;
    display: flex;
    align-items: flex-start;
    gap: 10px;
    line-height: 1.45;
}

.alert-ok {
    background-color: var(--success-soft);
    border: 1px solid var(--success-border);
    color: #14532D;
}

.alert-err {
    background-color: var(--danger-soft);
    border: 1px solid var(--danger-border);
    color: #7F1D1D;
}

.alert-info {
    background-color: var(--info-soft);
    border: 1px solid var(--info-border);
    color: #1E3A8A;
}

/* Form Controls */
.field {
    margin-bottom: 12px;
}

.field label, label {
    display: block;
    font-size: 0.85rem;
    font-weight: 700;
    color: var(--text-main);
    margin-bottom: 4px;
}

input[type="text"],
input[type="password"],
input[type="number"],
select,
textarea {
    width: 100%;
    min-height: 38px;
    padding: 8px 12px;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-md);
    font-size: 0.92rem;
    font-family: inherit;
    color: var(--text-main);
    background-color: #FFFFFF;
    transition: var(--transition);
}

input:focus,
select:focus,
textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(27, 54, 93, 0.12);
}

input::placeholder,
textarea::placeholder {
    color: #94A3B8;
}

input[type="range"] {
    width: 100%;
    cursor: pointer;
    accent-color: var(--accent);
}

/* Tables */
.table-wrap {
    width: 100%;
    overflow-x: auto;
    -webkit-overflow-scrolling: touch;
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    margin-top: 10px;
    background: #FFFFFF;
}

table {
    width: 100%;
    border-collapse: collapse;
    font-size: 0.88rem;
    text-align: left;
}

th, td {
    padding: 10px 14px;
    border-bottom: 1px solid var(--border);
}

th {
    background-color: var(--bg-subtle);
    font-weight: 700;
    color: var(--text-sub);
    font-size: 0.8rem;
    text-transform: uppercase;
    letter-spacing: 0.03em;
    white-space: nowrap;
}

tr:last-child td {
    border-bottom: none;
}

tbody tr:hover {
    background-color: rgba(241, 245, 249, 0.6);
}

/* Tab Navigation */
.studio-tabs {
    display: flex;
    gap: 8px;
    border-bottom: 1px solid var(--border);
    padding-bottom: 12px;
    margin-bottom: 18px;
    overflow-x: auto;
}

.tab-btn {
    padding: 9px 18px;
    border-radius: var(--radius-md);
    font-size: 0.92rem;
    font-weight: 700;
    border: 1px solid var(--border);
    background-color: var(--bg-subtle);
    color: var(--text-sub);
    cursor: pointer;
    transition: var(--transition);
    white-space: nowrap;
}

.tab-btn:hover {
    background-color: #E2E8F0;
    color: var(--text-main);
}

.tab-btn.active {
    background-color: var(--accent);
    color: #FFFFFF;
    border-color: var(--accent);
}

.tab-btn:focus-visible {
    outline: 2px solid var(--primary);
    outline-offset: 2px;
}

/* Color Palette Swatches & Cards */
.color-card {
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    overflow: hidden;
    background-color: #FFFFFF;
    display: flex;
    flex-direction: column;
    box-shadow: var(--shadow-sm);
    transition: var(--transition);
}

.color-card:hover {
    box-shadow: var(--shadow-md);
    border-color: var(--border-strong);
}

.swatch-header {
    height: 80px;
    padding: 12px 14px;
    display: flex;
    align-items: flex-end;
    justify-content: space-between;
    border-bottom: 1px solid rgba(0, 0, 0, 0.08);
}

.swatch-badge {
    background: rgba(15, 23, 42, 0.82);
    color: #FFFFFF;
    padding: 3px 8px;
    border-radius: var(--radius-sm);
    font-size: 0.78rem;
    font-weight: 700;
}

.color-body {
    padding: 16px;
    flex: 1;
    display: flex;
    flex-direction: column;
    gap: 10px;
}

.formula-mini {
    background-color: var(--bg-canvas);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    padding: 8px 12px;
    font-size: 0.85rem;
}

.formula-row {
    display: flex;
    align-items: center;
    justify-content: space-between;
    padding: 4px 0;
    border-bottom: 1px dashed var(--border);
}

.formula-row:last-child {
    border-bottom: none;
}

.dot {
    width: 12px;
    height: 12px;
    border-radius: 50%;
    display: inline-block;
    border: 1px solid rgba(0, 0, 0, 0.2);
    vertical-align: middle;
    margin-right: 6px;
}

/* Provider Config Cards */
.provider-card {
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 18px;
    background-color: #FAFAFA;
    transition: var(--transition);
}

.provider-card:hover {
    border-color: var(--border-strong);
}

.provider-card.active-default {
    border: 2px solid var(--accent);
    background-color: #FFF9FA;
}

/* Live Diagnostic Result Card */
.test-result-box {
    padding: 14px 16px;
    border-radius: var(--radius-md);
    font-size: 0.88rem;
    line-height: 1.5;
    animation: fadeIn 0.2s ease-out;
}

.test-result-ok {
    background-color: var(--success-soft);
    border: 1px solid var(--success-border);
    color: #14532D;
}

.test-result-err {
    background-color: var(--danger-soft);
    border: 1px solid var(--danger-border);
    color: #7F1D1D;
}

.test-result-wait {
    background-color: var(--info-soft);
    border: 1px solid var(--info-border);
    color: #1E3A8A;
}

@keyframes fadeIn {
    from { opacity: 0; transform: translateY(-4px); }
    to { opacity: 1; transform: translateY(0); }
}

/* Responsive Grids */
.hero-grid {
    display: grid;
    grid-template-columns: 1.35fr 1fr;
    gap: 20px;
    margin-bottom: 24px;
}

.admin-top-grid {
    display: grid;
    grid-template-columns: 1.2fr 1fr;
    gap: 18px;
    margin-bottom: 20px;
}

.provider-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 380px), 1fr));
    gap: 16px;
    margin-top: 14px;
}

.suggest-form-grid {
    display: grid;
    grid-template-columns: 1fr 220px 160px auto;
    gap: 10px;
    margin-bottom: 12px;
    align-items: end;
}

.adjust-form-grid {
    display: grid;
    grid-template-columns: 1.1fr 1fr 180px;
    gap: 12px;
    margin-bottom: 12px;
    align-items: end;
}

.add-provider-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(180px, 1fr));
    gap: 10px;
    align-items: end;
}

.add-user-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(170px, 1fr));
    gap: 10px;
    align-items: end;
}

.results-grid {
    display: grid;
    grid-template-columns: repeat(auto-fill, minmax(min(100%, 350px), 1fr));
    gap: 16px;
    margin-top: 16px;
}

.compare-grid {
    display: grid;
    grid-template-columns: 1fr 1fr;
    gap: 16px;
    margin-top: 16px;
}

/* Download Callout Box */
.dl-box {
    margin-top: 18px;
    padding: 16px 18px;
    border-radius: var(--radius-lg);
    background: var(--bg-canvas);
    border: 1px solid var(--border);
    display: flex;
    align-items: center;
    justify-content: space-between;
    flex-wrap: wrap;
    gap: 14px;
}

/* Login Card Layout */
.login-body {
    background-color: var(--bg-topbar);
    display: flex;
    align-items: center;
    justify-content: center;
    min-height: 100vh;
    padding: 24px;
}

.login-card {
    width: 100%;
    max-width: 440px;
    background-color: #FFFFFF;
    border-radius: var(--radius-lg);
    padding: 32px 30px;
    box-shadow: 0 20px 40px rgba(0, 0, 0, 0.35);
    border: 1px solid rgba(255, 255, 255, 0.1);
}

.login-header {
    display: flex;
    align-items: center;
    gap: 14px;
    margin-bottom: 22px;
}

/* AI Multi-turn Chat Thread & Multiline Input */
.chat-thread {
    max-height: 280px;
    overflow-y: auto;
    padding: 14px;
    background: var(--bg-canvas);
    border: 1px solid var(--border);
    border-radius: var(--radius-md);
    display: flex;
    flex-direction: column;
    gap: 10px;
    margin-bottom: 12px;
}

.chat-bubble {
    max-width: 82%;
    padding: 10px 14px;
    border-radius: 12px;
    font-size: 0.92rem;
    line-height: 1.5;
    white-space: pre-wrap;
    word-break: break-word;
}

.chat-bubble.chat-user {
    align-self: flex-end;
    background: var(--primary-soft);
    border: 1px solid var(--info-border);
    color: var(--text-main);
    border-bottom-right-radius: 4px;
}

.chat-bubble.chat-ai {
    align-self: flex-start;
    background: #FFFFFF;
    border: 1px solid var(--border);
    color: var(--text-main);
    border-bottom-left-radius: 4px;
    box-shadow: var(--shadow-sm);
}

.chat-sender {
    font-size: 0.76rem;
    font-weight: 700;
    margin-bottom: 3px;
    display: flex;
    align-items: center;
    gap: 6px;
}

.chat-user .chat-sender {
    color: var(--info);
}

.chat-ai .chat-sender {
    color: var(--accent);
}

textarea.chat-textarea {
    width: 100%;
    min-height: 54px;
    max-height: 140px;
    padding: 10px 12px;
    border: 1px solid var(--border-strong);
    border-radius: var(--radius-md);
    font-family: inherit;
    font-size: 0.95rem;
    line-height: 1.45;
    color: var(--text-main);
    background: #FFFFFF;
    resize: vertical;
}

textarea.chat-textarea:focus {
    outline: none;
    border-color: var(--primary);
    box-shadow: 0 0 0 3px rgba(27, 54, 93, 0.12);
}

/* Direct Color Slider Panel */
.slider-panel {
    background: var(--bg-canvas);
    border: 1px solid var(--border);
    border-radius: var(--radius-lg);
    padding: 18px 20px;
    margin-bottom: 16px;
}

.slider-ticks {
    display: flex;
    justify-content: space-between;
    font-size: 0.8rem;
    color: var(--text-muted);
    margin-top: 6px;
    font-weight: 500;
}

/* Media Queries for Responsive Behavior */
@media (max-width: 1024px) {
    .hero-grid,
    .admin-top-grid,
    .suggest-form-grid,
    .adjust-form-grid,
    .compare-grid {
        grid-template-columns: 1fr;
    }
}

@media (max-width: 640px) {
    .topbar {
        flex-direction: column;
        align-items: flex-start;
        gap: 12px;
        padding: 12px 16px;
    }

    .nav-actions {
        width: 100%;
        flex-wrap: wrap;
        justify-content: flex-start;
    }

    .container {
        padding: 16px 14px 40px;
    }

    .hero-grid,
    .admin-top-grid,
    .provider-grid,
    .suggest-form-grid,
    .adjust-form-grid,
    .add-provider-grid,
    .add-user-grid,
    .results-grid,
    .compare-grid {
        grid-template-columns: 1fr;
    }

    .login-card {
        padding: 24px 20px;
    }
}

/* Accessibility: Reduced Motion */
@media (prefers-reduced-motion: reduce) {
    *, *::before, *::after {
        animation-duration: 0.01ms !important;
        animation-iteration-count: 1 !important;
        transition-duration: 0.01ms !important;
        scroll-behavior: auto !important;
    }
}