/* ============================================================
   Microsoft 365 Fluent Design Theme
   M365 Copilot ROI Calculator
   ============================================================ */

:root {
    /* Microsoft Brand Colors */
    --ms-blue:         #0078D4;
    --ms-blue-dark:    #005a9e;
    --ms-blue-darker:  #004578;
    --ms-blue-light:   #c7e0f4;
    --ms-blue-xlight:  #eff6fc;

    --ms-teal:         #00BCF2;
    --ms-green:        #107c10;
    --ms-green-light:  #dff6dd;
    --ms-red:          #a4262c;
    --ms-orange:       #ca5010;
    --ms-yellow:       #ffb900;

    /* Neutrals (Fluent neutral ramp) */
    --ms-white:        #ffffff;
    --ms-gray-10:      #faf9f8;
    --ms-gray-20:      #f3f2f1;
    --ms-gray-30:      #edebe9;
    --ms-gray-40:      #e1dfdd;
    --ms-gray-60:      #c8c6c4;
    --ms-gray-90:      #8a8886;
    --ms-gray-130:     #605e5c;
    --ms-gray-160:     #323130;
    --ms-black:        #201f1e;

    /* Legacy aliases — keeps existing HTML references working */
    --copilot-blue:    #0078D4;
    --copilot-cyan:    #00BCF2;
    --copilot-purple:  #7719aa;
    --copilot-orange:  #ca5010;
    --dark-blue:       #005a9e;
    --light-blue:      #c7e0f4;
    --gray:            #605e5c;
    --light-gray:      #f3f2f1;
    --white:           #ffffff;
    --green:           #107c10;
    --red:             #a4262c;
    --shadow:          rgba(0, 0, 0, 0.08);
}

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

/* ── Base ───────────────────────────────────────────────── */
body {
    font-family: 'Segoe UI', system-ui, -apple-system, BlinkMacSystemFont,
                 'Helvetica Neue', Arial, sans-serif;
    font-size: 14px;
    line-height: 1.5;
    color: var(--ms-gray-160);
    background: var(--ms-gray-20);
    min-height: 100vh;
}

/* ── Microsoft Top Bar ──────────────────────────────────── */
.ms-topbar {
    background: var(--ms-black);
    position: sticky;
    top: 0;
    z-index: 1000;
    height: 48px;
    display: flex;
    align-items: center;
}

.ms-topbar-inner {
    width: 100%;
    max-width: 1400px;
    margin: 0 auto;
    padding: 0 1.5rem;
    display: flex;
    align-items: center;
    gap: 0.875rem;
}

.ms-logo {
    display: block;
    flex-shrink: 0;
}

.ms-topbar-brand {
    display: flex;
    align-items: center;
    gap: 0.625rem;
}

.ms-topbar-brand-name {
    font-size: 15px;
    font-weight: 600;
    color: var(--ms-white);
    letter-spacing: -0.01em;
    white-space: nowrap;
}

.ms-topbar-divider {
    color: var(--ms-gray-90);
    font-size: 16px;
    font-weight: 300;
    line-height: 1;
    padding: 0 0.125rem;
}

.ms-topbar-product {
    font-size: 13px;
    color: var(--ms-gray-60);
    font-weight: 400;
    white-space: nowrap;
}

/* ── Page Header (blue gradient band) ──────────────────── */
.ms-page-header {
    background: linear-gradient(135deg, #0078D4 0%, #005a9e 60%, #004578 100%);
    padding: 0;
    position: relative;
    overflow: hidden;
}

.ms-page-header::after {
    content: '';
    position: absolute;
    right: -60px;
    top: -60px;
    width: 360px;
    height: 360px;
    background: rgba(255, 255, 255, 0.04);
    border-radius: 50%;
    pointer-events: none;
}

/* ── Container ──────────────────────────────────────────── */
.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 2rem;
}

/* container inside the page header has top/bottom padding */
.ms-page-header .container {
    padding-top: 1.75rem;
    position: relative;
    z-index: 1;
}

/* container for main content */
.ms-content .container,
body > .container {
    padding-top: 1.75rem;
    padding-bottom: 2.5rem;
}

/* ── Header ─────────────────────────────────────────────── */
header {
    margin-bottom: 0;
    padding: 0;
    background: transparent;
    border-radius: 0;
    box-shadow: none;
}

.header-content {
    display: flex;
    justify-content: space-between;
    align-items: flex-start;
    gap: 2rem;
}

.header-content > div:first-child {
    flex: 1;
    text-align: left;
}

header h1 {
    font-size: 1.875rem;
    color: var(--ms-white);
    margin-bottom: 0.25rem;
    font-weight: 600;
    letter-spacing: -0.02em;
    line-height: 1.2;
}

.subtitle {
    font-size: 0.9375rem;
    color: rgba(255, 255, 255, 0.72);
    font-weight: 400;
}

.header-actions {
    display: flex;
    gap: 0.5rem;
    flex-shrink: 0;
    align-items: flex-start;
    padding-top: 0.25rem;
}

/* ── Action Buttons (header) ────────────────────────────── */
.action-btn {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 0.375rem;
    padding: 0.4rem 0.875rem;
    background: rgba(255, 255, 255, 0.1);
    border: 1px solid rgba(255, 255, 255, 0.28);
    border-radius: 4px;
    color: var(--ms-white);
    cursor: pointer;
    transition: background 0.15s ease;
    font-family: inherit;
    font-size: 13px;
    font-weight: 600;
    white-space: nowrap;
}

.action-btn:hover {
    background: rgba(255, 255, 255, 0.18);
    transform: none;
    box-shadow: none;
}

.action-icon { font-size: 0.9375rem; }
.action-text { font-size: 13px; font-weight: 600; }

/* ── Navigation Tabs ────────────────────────────────────── */
.nav-buttons {
    display: flex;
    gap: 0;
    justify-content: flex-start;
    margin: 0.5rem 0 0;
    flex-wrap: nowrap;
    overflow-x: auto;
    scrollbar-width: none;
    -ms-overflow-style: none;
}

.nav-buttons::-webkit-scrollbar { display: none; }

.nav-btn {
    display: flex;
    flex-direction: row;
    align-items: center;
    gap: 0.4rem;
    padding: 0.75rem 1.125rem;
    background: transparent;
    border: none;
    border-bottom: 3px solid transparent;
    border-radius: 0;
    text-decoration: none;
    color: rgba(255, 255, 255, 0.7);
    transition: color 0.15s ease, background 0.15s ease, border-color 0.15s ease;
    min-width: unset;
    box-shadow: none;
    font-size: 14px;
    font-weight: 600;
    white-space: nowrap;
    cursor: pointer;
}

.nav-btn:hover {
    color: var(--ms-white);
    background: rgba(255, 255, 255, 0.08);
    border-bottom-color: rgba(255, 255, 255, 0.45);
    transform: none;
    box-shadow: none;
}

.nav-btn-active {
    color: var(--ms-white);
    border-bottom-color: var(--ms-white);
    background: transparent;
    box-shadow: none;
}

.nav-btn-active:hover {
    background: rgba(255, 255, 255, 0.08);
    border-bottom-color: var(--ms-white);
    transform: none;
    box-shadow: none;
}

.nav-icon  { font-size: 0.9375rem; }
.nav-text  { font-size: 14px; font-weight: 600; }

/* ── Cards / Sections ───────────────────────────────────── */
.instructions-section {
    background: var(--ms-white);
    border-radius: 6px;
    padding: 1.75rem 2rem;
    box-shadow: 0 1.6px 3.6px rgba(0,0,0,.132), 0 0.3px 0.9px rgba(0,0,0,.108);
    margin-bottom: 1.25rem;
    border: 1px solid var(--ms-gray-40);
}

.instructions-section h2 {
    color: var(--ms-gray-160);
    font-size: 1.25rem;
    font-weight: 600;
    margin-bottom: 1.375rem;
    text-align: left;
}

.step-card {
    display: flex;
    gap: 1.25rem;
    margin-bottom: 1.375rem;
    padding: 1.25rem;
    background: var(--ms-gray-10);
    border-radius: 4px;
    border: 1px solid var(--ms-gray-30);
    border-left: 3px solid var(--ms-blue);
}

.step-number {
    flex-shrink: 0;
    width: 36px;
    height: 36px;
    background: var(--ms-blue);
    color: var(--ms-white);
    border-radius: 4px;
    display: flex;
    align-items: center;
    justify-content: center;
    font-size: 1rem;
    font-weight: 700;
}

.step-content { flex: 1; }

.step-content h3 {
    color: var(--ms-gray-160);
    margin-bottom: 0.5rem;
    font-size: 1rem;
    font-weight: 600;
}

.step-content p {
    margin-bottom: 0.75rem;
    color: var(--ms-gray-130);
    font-size: 14px;
}

.step-content ol {
    margin-left: 1.25rem;
    margin-bottom: 0.75rem;
    color: var(--ms-gray-130);
    font-size: 14px;
}

.step-content li { margin-bottom: 0.35rem; }

/* ── Info Boxes ─────────────────────────────────────────── */
.info-box {
    background: var(--ms-blue-xlight);
    padding: 0.75rem 1rem;
    border-radius: 4px;
    border-left: 3px solid var(--ms-blue);
    margin-top: 0.875rem;
}

.info-box strong { display: inline; color: var(--ms-blue-dark); font-weight: 600; }

.info-box p {
    margin: 0;
    font-size: 13.5px;
    line-height: 1.7;
    color: var(--ms-gray-160);
}

.info-box small { font-size: 12px; color: var(--ms-gray-90); }

.privacy-box {
    display: flex;
    gap: 0.875rem;
    align-items: flex-start;
    border-left-color: var(--ms-green);
    background: var(--ms-green-light);
}

.privacy-box svg { flex-shrink: 0; color: var(--ms-green); margin-top: 0.1rem; }

/* ── Upload Area ────────────────────────────────────────── */
.upload-area {
    border: 2px dashed var(--ms-gray-60);
    border-radius: 6px;
    padding: 2.5rem;
    text-align: center;
    background: var(--ms-gray-10);
    transition: border-color 0.15s ease, background 0.15s ease;
    cursor: pointer;
    margin: 1.25rem 0;
}

.upload-area:hover,
.upload-area.dragover {
    border-color: var(--ms-blue);
    background: var(--ms-blue-xlight);
}

.upload-area svg   { color: var(--ms-blue); margin-bottom: 0.875rem; }
.upload-area p     { margin: 0.35rem 0; color: var(--ms-gray-130); font-size: 14px; }

/* ── Buttons — Fluent style ─────────────────────────────── */
.btn-primary, .btn-secondary {
    padding: 0.5rem 1.25rem;
    font-size: 14px;
    font-weight: 600;
    border-radius: 4px;
    cursor: pointer;
    transition: background 0.15s ease, border-color 0.15s ease;
    display: inline-block;
    font-family: inherit;
    line-height: 1.5;
    text-decoration: none;
}

.btn-primary {
    background: var(--ms-blue);
    color: var(--ms-white);
    border: 1px solid var(--ms-blue);
}

.btn-primary:hover {
    background: var(--ms-blue-dark);
    border-color: var(--ms-blue-dark);
    transform: none;
    box-shadow: none;
}

.btn-secondary {
    background: var(--ms-white);
    color: var(--ms-gray-160);
    border: 1px solid var(--ms-gray-60);
}

.btn-secondary:hover {
    background: var(--ms-gray-20);
    color: var(--ms-gray-160);
    transform: none;
    box-shadow: none;
}

/* ── Config Grid ────────────────────────────────────────── */
.config-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(260px, 1fr));
    gap: 1.25rem;
    margin-top: 1.25rem;
}

.config-item { display: flex; flex-direction: column; }

.config-item label {
    font-weight: 600;
    color: var(--ms-gray-160);
    margin-bottom: 0.375rem;
    font-size: 14px;
}

.config-item input,
.config-item select {
    padding: 0.4375rem 0.75rem;
    font-size: 14px;
    border: 1px solid var(--ms-gray-60);
    border-radius: 4px;
    transition: border-color 0.15s ease, box-shadow 0.15s ease;
    font-family: inherit;
    background-color: var(--ms-white);
    width: 100%;
    color: var(--ms-gray-160);
    height: 32px;
}

.config-item select {
    appearance: none;
    -webkit-appearance: none;
    background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='12' height='12' viewBox='0 0 12 12'%3E%3Cpath fill='%23605E5C' d='M6 9L1 4h10z'/%3E%3C/svg%3E");
    background-repeat: no-repeat;
    background-position: right 0.75rem center;
    padding-right: 2.25rem;
    cursor: pointer;
}

.config-item input[type="range"] { height: auto; padding: 0; border: none; background: none; }

.config-item input:focus,
.config-item select:focus {
    outline: none;
    border-color: var(--ms-blue);
    box-shadow: 0 0 0 1px var(--ms-blue);
}

.config-item small { margin-top: 0.25rem; font-size: 12px; color: var(--ms-gray-90); }

/* ── Loading ────────────────────────────────────────────── */
#loadingState { text-align: center; padding: 3rem; }

.loading-spinner {
    width: 44px;
    height: 44px;
    border: 4px solid var(--ms-gray-30);
    border-top-color: var(--ms-blue);
    border-radius: 50%;
    animation: spin 0.7s linear infinite;
    margin: 0 auto 1rem;
}

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

/* ── Error ──────────────────────────────────────────────── */
.error-box {
    background: #fde7e9;
    border: 1px solid var(--ms-red);
    border-radius: 6px;
    padding: 1.5rem;
    text-align: center;
}

.error-box h3 { color: var(--ms-red); margin-bottom: 0.75rem; font-size: 1.1rem; }

/* ── Results ────────────────────────────────────────────── */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(10px); }
    to   { opacity: 1; transform: translateY(0); }
}

.results-container { animation: fadeIn 0.25s ease; }

.metrics-grid {
    display: grid;
    grid-template-columns: repeat(auto-fit, minmax(200px, 1fr));
    gap: 1rem;
    margin-bottom: 1.5rem;
}

.metric-card {
    background: var(--ms-white);
    padding: 1.25rem 1.375rem;
    border-radius: 6px;
    box-shadow: 0 1.6px 3.6px rgba(0,0,0,.132), 0 0.3px 0.9px rgba(0,0,0,.108);
    text-align: left;
    border: 1px solid var(--ms-gray-40);
    border-top: 3px solid var(--ms-blue);
}

.metric-value {
    font-size: 1.875rem;
    font-weight: 700;
    color: var(--ms-blue);
    margin: 0.25rem 0;
    letter-spacing: -0.025em;
    line-height: 1.15;
}

.metric-label {
    font-size: 10.5px;
    color: var(--ms-gray-90);
    text-transform: uppercase;
    letter-spacing: 0.08em;
    font-weight: 600;
}

.metric-sublabel { font-size: 12px; color: var(--ms-gray-90); margin-top: 0.25rem; }

/* ── ROI Table ──────────────────────────────────────────── */
.roi-table-container {
    background: var(--ms-white);
    padding: 1.5rem 1.75rem;
    border-radius: 6px;
    box-shadow: 0 1.6px 3.6px rgba(0,0,0,.132), 0 0.3px 0.9px rgba(0,0,0,.108);
    margin-bottom: 1.5rem;
    border: 1px solid var(--ms-gray-40);
}

.roi-table-container h2 {
    color: var(--ms-gray-160);
    margin-bottom: 1.125rem;
    text-align: left;
    font-size: 1.0625rem;
    font-weight: 600;
}

table { width: 100%; border-collapse: collapse; font-size: 14px; }

th {
    background: var(--ms-gray-10);
    color: var(--ms-gray-130);
    padding: 0.5rem 0.875rem;
    text-align: left;
    font-weight: 600;
    font-size: 11.5px;
    text-transform: uppercase;
    letter-spacing: 0.06em;
    border-bottom: 2px solid var(--ms-gray-40);
}

th.sortable { cursor: pointer; user-select: none; transition: background 0.15s ease; }
th.sortable:hover { background: var(--ms-gray-20); }
th.sortable .sort-icon { font-size: 0.8em; margin-left: 0.2rem; color: var(--ms-gray-90); }
th.sortable.sort-asc, th.sortable.sort-desc { background: var(--ms-gray-20); color: var(--ms-blue); }

td {
    padding: 0.5625rem 0.875rem;
    border-bottom: 1px solid var(--ms-gray-30);
    color: var(--ms-gray-160);
    font-size: 14px;
}

tr:last-child td { border-bottom: none; }
tr:hover td { background: var(--ms-gray-10); }

.highlight-row td { background: var(--ms-blue-xlight); font-weight: 600; }
.highlight-row:hover td { background: #d7ebf9; }

/* ── Leaderboard ────────────────────────────────────────── */
.leaderboard-container {
    background: var(--ms-white);
    padding: 1.5rem 1.75rem;
    border-radius: 6px;
    box-shadow: 0 1.6px 3.6px rgba(0,0,0,.132), 0 0.3px 0.9px rgba(0,0,0,.108);
    margin-bottom: 1.5rem;
    border: 1px solid var(--ms-gray-40);
}

.leaderboard-container h2 {
    color: var(--ms-gray-160);
    margin-bottom: 1.125rem;
    font-size: 1.0625rem;
    font-weight: 600;
}

.leaderboard-item {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding: 0.6875rem 0.5rem;
    border-bottom: 1px solid var(--ms-gray-30);
    transition: background 0.15s ease;
    border-radius: 4px;
}

.leaderboard-item:last-child { border-bottom: none; }
.leaderboard-item:hover { background: var(--ms-gray-10); }

.leaderboard-rank  { font-size: 1rem; font-weight: 700; color: var(--ms-blue); min-width: 30px; }
.leaderboard-name  { flex: 1; font-weight: 600; color: var(--ms-gray-160); font-size: 14px; }
.leaderboard-value { font-size: 1rem; font-weight: 700; color: var(--ms-green); }
.leaderboard-subvalue { font-size: 12px; color: var(--ms-gray-90); margin-left: 0.75rem; }

/* ── Footer ─────────────────────────────────────────────── */
footer {
    text-align: center;
    padding: 1.25rem 1.5rem;
    color: var(--ms-gray-90);
    font-size: 12px;
    border-top: 1px solid var(--ms-gray-40);
    margin-top: 2rem;
    background: transparent;
}

footer a { color: var(--ms-blue); text-decoration: none; font-weight: 600; }
footer a:hover { text-decoration: underline; }

/* ── Toggle Switch — Fluent ─────────────────────────────── */
.toggle-switch {
    position: relative;
    display: inline-block;
    width: 44px;
    height: 22px;
}

.toggle-switch input { opacity: 0; width: 0; height: 0; }

.toggle-slider {
    position: absolute;
    cursor: pointer;
    inset: 0;
    background-color: var(--ms-gray-90);
    transition: 0.2s;
    border-radius: 22px;
}

.toggle-slider:before {
    position: absolute;
    content: "";
    height: 16px;
    width: 16px;
    left: 3px;
    bottom: 3px;
    background-color: var(--ms-white);
    transition: 0.2s;
    border-radius: 50%;
}

input:checked + .toggle-slider { background-color: var(--ms-blue); }
input:checked + .toggle-slider:before { transform: translateX(22px); }
.toggle-slider:hover { box-shadow: 0 0 0 3px rgba(0, 120, 212, 0.2); }

/* ── Print ──────────────────────────────────────────────── */
@media print {
    .ms-topbar, .ms-page-header .nav-buttons,
    .header-actions, .action-btn, button { display: none !important; }
    .ms-page-header { background: none !important; }
    header h1 { color: var(--ms-gray-160) !important; }
    .subtitle { color: var(--ms-gray-130) !important; }
    .page-break { page-break-before: always; }
    .phase-card, .month-card, .insight-card, .scenario-card,
    img, .timeline-visual, .month-grid { page-break-inside: avoid; }
}

/* ── Responsive ─────────────────────────────────────────── */
@media (max-width: 768px) {
    .container { padding-left: 1rem; padding-right: 1rem; }
    header h1  { font-size: 1.375rem; }

    .header-content {
        flex-direction: column;
        gap: 0.875rem;
        align-items: flex-start;
    }

    .header-actions { justify-content: flex-start; }
    .step-card      { flex-direction: column; }
    .config-grid    { grid-template-columns: 1fr; }
    .metrics-grid   { grid-template-columns: 1fr 1fr; }
    .ms-topbar-product { display: none; }
}

@media (max-width: 480px) {
    .metrics-grid { grid-template-columns: 1fr; }
}