/* ============================================================
   ToolFlow — Design System: "The Fluid Architect"
   Stitch MCP generated tokens. DO NOT modify visual values.
   ============================================================ */

@import url('https://fonts.googleapis.com/css2?family=Manrope:wght@400;500;600;700;800&family=Inter:wght@400;500;600&display=swap');

/* ── Design Tokens ── */
:root {
  --color-primary:              #004ac6;
  --color-primary-container:    #2563eb;
  --color-on-primary:           #ffffff;
  --color-on-primary-container: #eeefff;
  --color-secondary:            #495c95;
  --color-secondary-container:  #acbfff;
  --color-on-secondary:         #ffffff;
  --color-on-secondary-container: #394c84;
  --color-tertiary:             #943700;
  --color-tertiary-container:   #bc4800;
  --color-on-tertiary:          #ffffff;
  --color-error:                #ba1a1a;
  --color-error-container:      #ffdad6;
  --color-surface:              #faf8ff;
  --color-surface-bright:       #faf8ff;
  --color-surface-dim:          #d9d9e5;
  --color-surface-tint:         #0053db;
  --color-surface-lowest:       #ffffff;
  --color-surface-low:          #f3f3fe;
  --color-surface-container:    #ededf9;
  --color-surface-high:         #e7e7f3;
  --color-surface-highest:      #e1e2ed;
  --color-on-surface:           #191b23;
  --color-on-surface-variant:   #434655;
  --color-outline:              #737686;
  --color-outline-variant:      rgba(195, 198, 215, 0.20);
  --color-inverse-surface:      #2e3039;
  --color-inverse-on-surface:   #f0f0fb;
  --color-inverse-primary:      #b4c5ff;

  --gradient-primary: linear-gradient(135deg, var(--color-primary) 0%, var(--color-primary-container) 100%);

  --font-headline: 'Manrope', sans-serif;
  --font-body:     'Inter', sans-serif;

  --radius-sm:  4px;
  --radius-md:  8px;
  --radius-lg:  12px;
  --radius-full: 9999px;

  --shadow-ambient: 0 4px 32px rgba(25, 27, 35, 0.06);
  --shadow-float:   0 8px 32px rgba(25, 27, 35, 0.10);

  --nav-height: 64px;
  --sidebar-width: 300px;
  --content-max: 1200px;
}

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

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  background: var(--color-surface);
  color: var(--color-on-surface);
  font-size: 0.9375rem;
  line-height: 1.6;
  -webkit-font-smoothing: antialiased;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-headline);
  color: var(--color-on-surface);
  line-height: 1.2;
}

a { color: var(--color-primary); text-decoration: none; }
a:hover { color: var(--color-primary-container); }

img { max-width: 100%; display: block; }

/* ── Navigation ── */
.nav {
  position: sticky;
  top: 0;
  z-index: 100;
  height: var(--nav-height);
  background: rgba(243, 243, 254, 0.85);
  backdrop-filter: blur(12px);
  -webkit-backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  padding: 0 2rem;
  gap: 1.5rem;
}

.nav__logo {
  font-family: var(--font-headline);
  font-size: 1.375rem;
  font-weight: 800;
  background: var(--gradient-primary);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  white-space: nowrap;
  text-decoration: none;
}

.nav__search {
  flex: 1;
  max-width: 480px;
  position: relative;
}

.nav__search input {
  width: 100%;
  padding: 0.5rem 1rem 0.5rem 2.75rem;
  background: var(--color-surface-high);
  border: none;
  border-radius: var(--radius-full);
  font-family: var(--font-body);
  font-size: 0.875rem;
  color: var(--color-on-surface);
  outline: none;
  transition: background 0.2s, box-shadow 0.2s;
}

.nav__search input:focus {
  background: var(--color-surface-lowest);
  box-shadow: 0 0 0 2px var(--color-primary);
}

.nav__search input::placeholder { color: var(--color-on-surface-variant); }

.nav__search-icon {
  position: absolute;
  left: 0.875rem;
  top: 50%;
  transform: translateY(-50%);
  color: var(--color-on-surface-variant);
  font-size: 1.1rem;
  pointer-events: none;
  font-family: 'Material Symbols Outlined';
  font-weight: 400;
  font-style: normal;
}

.nav__links {
  display: flex;
  gap: 0.25rem;
  list-style: none;
  margin-left: auto;
}

.nav__links a {
  font-size: 0.8125rem;
  font-weight: 500;
  color: var(--color-on-surface-variant);
  padding: 0.375rem 0.75rem;
  border-radius: var(--radius-md);
  transition: background 0.15s, color 0.15s;
  white-space: nowrap;
}

.nav__links a:hover {
  background: var(--color-surface-container);
  color: var(--color-on-surface);
}

/* ── Buttons ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  border: none;
  border-radius: var(--radius-md);
  cursor: pointer;
  transition: opacity 0.2s, transform 0.1s;
  padding: 0.75rem 1.75rem;
}

.btn:active { transform: scale(0.98); }

.btn-primary {
  background: var(--gradient-primary);
  color: var(--color-on-primary);
}
.btn-primary:hover { opacity: 0.92; }

.btn-secondary {
  background: var(--color-secondary-container);
  color: var(--color-on-secondary-container);
}
.btn-secondary:hover { opacity: 0.88; }

.btn-lg {
  font-size: 1rem;
  padding: 0.875rem 2.25rem;
}

.btn:disabled {
  opacity: 0.45;
  cursor: not-allowed;
  transform: none;
}

/* ── Ad Zone Placeholders ── */
.ad-zone {
  background: var(--color-surface-high);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  font-weight: 500;
  color: var(--color-on-surface-variant);
  letter-spacing: 0.05em;
  text-transform: uppercase;
  overflow: hidden;
}

.ad-zone--banner {
  width: 100%;
  height: 90px;
  margin: 1.5rem 0;
}

.ad-zone--sidebar {
  width: 100%;
  height: 250px;
  margin-bottom: 1rem;
}

/* ── Affiliate Banners ── */
.affiliate-banner {
  background: var(--color-surface-container);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.5rem;
  display: flex;
  align-items: center;
  gap: 1rem;
  margin: 1.5rem 0;
  cursor: pointer;
  transition: background 0.15s;
}
.affiliate-banner:hover { background: var(--color-surface-high); }
.affiliate-banner__icon {
  font-size: 2rem;
  flex-shrink: 0;
}
.affiliate-banner__text strong {
  display: block;
  font-family: var(--font-headline);
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-on-surface);
}
.affiliate-banner__text span {
  font-size: 0.8125rem;
  color: var(--color-on-surface-variant);
}
.affiliate-banner__cta {
  margin-left: auto;
  background: var(--gradient-primary);
  color: var(--color-on-primary);
  padding: 0.4rem 1rem;
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  white-space: nowrap;
}

/* ── Tool Card ── */
.tool-card {
  background: var(--color-surface-lowest);
  border-radius: var(--radius-lg);
  padding: 1.25rem 1.25rem 1rem;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  cursor: pointer;
  transition: background 0.15s, box-shadow 0.15s;
  text-decoration: none;
}
.tool-card:hover {
  background: var(--color-surface-bright);
  box-shadow: var(--shadow-ambient);
}
.tool-card__icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-md);
  background: var(--color-surface-container);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Material Symbols Outlined';
  font-size: 1.375rem;
  color: var(--color-primary);
  margin-bottom: 0.25rem;
}
.tool-card__name {
  font-family: var(--font-headline);
  font-size: 0.9375rem;
  font-weight: 700;
  color: var(--color-on-surface);
}
.tool-card__desc {
  font-size: 0.8125rem;
  color: var(--color-on-surface-variant);
  line-height: 1.45;
}

/* ── Upload Zone ── */
.upload-zone {
  background: var(--color-surface-lowest);
  border-radius: var(--radius-lg);
  padding: 3rem 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 1rem;
  text-align: center;
  cursor: pointer;
  transition: background 0.15s;
  outline: 2px dashed rgba(195, 198, 215, 0.5);
  outline-offset: -2px;
}
.upload-zone:hover,
.upload-zone.drag-over {
  background: var(--color-surface-low);
  outline-color: var(--color-primary);
}
.upload-zone__icon {
  font-family: 'Material Symbols Outlined';
  font-size: 3rem;
  color: var(--color-primary);
}
.upload-zone__title {
  font-family: var(--font-headline);
  font-size: 1.125rem;
  font-weight: 700;
  color: var(--color-on-surface);
}
.upload-zone__sub {
  font-size: 0.8125rem;
  color: var(--color-on-surface-variant);
}
.upload-zone input[type="file"] { display: none; }

/* ── File Info ── */
.file-info {
  background: var(--color-surface-container);
  border-radius: var(--radius-md);
  padding: 0.875rem 1.25rem;
  display: flex;
  align-items: center;
  gap: 0.875rem;
  margin-top: 1rem;
}
.file-info__icon {
  font-family: 'Material Symbols Outlined';
  font-size: 1.5rem;
  color: var(--color-primary);
}
.file-info__name {
  font-weight: 600;
  font-size: 0.9375rem;
  color: var(--color-on-surface);
  flex: 1;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.file-info__meta {
  font-size: 0.8125rem;
  color: var(--color-on-surface-variant);
}
.file-info__remove {
  font-family: 'Material Symbols Outlined';
  font-size: 1.25rem;
  color: var(--color-on-surface-variant);
  cursor: pointer;
  padding: 0.25rem;
  border-radius: var(--radius-sm);
  background: none;
  border: none;
  line-height: 1;
}
.file-info__remove:hover { background: var(--color-surface-high); }

/* ── Progress ── */
.progress-wrap {
  margin-top: 1rem;
}
.progress-bar {
  height: 6px;
  background: var(--color-surface-high);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.progress-bar__fill {
  height: 100%;
  background: var(--gradient-primary);
  border-radius: var(--radius-full);
  width: 0%;
  transition: width 0.3s ease;
}
.progress-label {
  font-size: 0.8125rem;
  color: var(--color-on-surface-variant);
  margin-top: 0.5rem;
  text-align: center;
}

/* ── Results Area ── */
.result-area {
  background: var(--color-surface-lowest);
  border-radius: var(--radius-lg);
  padding: 2rem;
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: 1rem;
  text-align: center;
  margin-top: 1.5rem;
}
.result-area__icon {
  width: 56px;
  height: 56px;
  background: #d1fae5;
  border-radius: var(--radius-full);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Material Symbols Outlined';
  font-size: 1.75rem;
  color: #059669;
}
.result-area__title {
  font-family: var(--font-headline);
  font-size: 1.25rem;
  font-weight: 700;
}
.result-area__meta {
  font-size: 0.875rem;
  color: var(--color-on-surface-variant);
}
.result-area__savings {
  font-family: var(--font-headline);
  font-size: 1rem;
  font-weight: 700;
  color: #059669;
}

/* ── Page Layout (Tool Page) ── */
.page-layout {
  max-width: calc(var(--content-max) + var(--sidebar-width) + 2rem);
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
  display: grid;
  grid-template-columns: 1fr var(--sidebar-width);
  gap: 2rem;
  align-items: start;
}

.page-main { min-width: 0; }

.page-sidebar {
  position: sticky;
  top: calc(var(--nav-height) + 1.5rem);
  display: flex;
  flex-direction: column;
  gap: 1rem;
}

/* ── Tool Header ── */
.tool-header {
  padding: 2.5rem 0 1.5rem;
}
.tool-header__breadcrumb {
  font-size: 0.8125rem;
  color: var(--color-on-surface-variant);
  margin-bottom: 0.75rem;
}
.tool-header__breadcrumb a { color: var(--color-primary); }
.tool-header h1 {
  font-size: clamp(1.75rem, 3vw, 2.5rem);
  font-weight: 800;
  margin-bottom: 0.5rem;
}
.tool-header__desc {
  font-size: 1rem;
  color: var(--color-on-surface-variant);
  max-width: 600px;
}

/* ── Tool Canvas (white working area) ── */
.tool-canvas {
  background: var(--color-surface-lowest);
  border-radius: var(--radius-lg);
  padding: 2rem;
  box-shadow: var(--shadow-ambient);
}

/* ── Section Headings ── */
.section-heading {
  font-family: var(--font-headline);
  font-size: 1.375rem;
  font-weight: 800;
  color: var(--color-on-surface);
  margin-bottom: 1.25rem;
}

/* ── Related Tools Section ── */
.related-tools {
  padding: 2.5rem 0 0;
}
.related-tools__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1rem;
}

/* ── Homepage Layout ── */
.home-layout {
  max-width: calc(var(--content-max) + var(--sidebar-width) + 2rem);
  margin: 0 auto;
  padding: 0 1.5rem 4rem;
  display: grid;
  grid-template-columns: 1fr var(--sidebar-width);
  gap: 2rem;
}

.home-main { min-width: 0; }

/* ── Hero ── */
.hero {
  padding: 4rem 0 2rem;
}
.hero h1 {
  font-size: clamp(2rem, 4vw, 3.25rem);
  font-weight: 800;
  margin-bottom: 1rem;
  max-width: 700px;
}
.hero p {
  font-size: 1.125rem;
  color: var(--color-on-surface-variant);
  margin-bottom: 2rem;
  max-width: 560px;
}
.hero__search {
  display: flex;
  max-width: 600px;
  background: var(--color-surface-lowest);
  border-radius: var(--radius-full);
  box-shadow: var(--shadow-float);
  overflow: hidden;
}
.hero__search input {
  flex: 1;
  padding: 0.875rem 1.5rem;
  border: none;
  background: transparent;
  font-family: var(--font-body);
  font-size: 1rem;
  color: var(--color-on-surface);
  outline: none;
}
.hero__search input::placeholder { color: var(--color-on-surface-variant); }
.hero__search button {
  background: var(--gradient-primary);
  color: var(--color-on-primary);
  border: none;
  padding: 0 1.75rem;
  font-family: var(--font-body);
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: opacity 0.2s;
}
.hero__search button:hover { opacity: 0.9; }

/* ── Category Section ── */
.category-section {
  margin-bottom: 3rem;
}
.category-section__header {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  margin-bottom: 1.25rem;
}
.category-section__icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-md);
  background: var(--color-surface-container);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: 'Material Symbols Outlined';
  font-size: 1.25rem;
  color: var(--color-primary);
}
.category-section__title {
  font-family: var(--font-headline);
  font-size: 1.25rem;
  font-weight: 800;
}
.tools-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 1rem;
}

/* ── Benefits Section ── */
.benefits {
  background: var(--color-surface-container);
  border-radius: var(--radius-lg);
  padding: 2.5rem 2rem;
  margin: 2rem 0 3rem;
}
.benefits h2 {
  font-size: 1.5rem;
  font-weight: 800;
  margin-bottom: 1.5rem;
}
.benefits-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(200px, 1fr));
  gap: 1.25rem;
}
.benefit-card {
  background: var(--color-surface-lowest);
  border-radius: var(--radius-md);
  padding: 1.25rem;
}
.benefit-card__icon {
  font-family: 'Material Symbols Outlined';
  font-size: 1.75rem;
  color: var(--color-primary);
  margin-bottom: 0.75rem;
}
.benefit-card__title {
  font-family: var(--font-headline);
  font-size: 1rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}
.benefit-card__desc {
  font-size: 0.8125rem;
  color: var(--color-on-surface-variant);
}

/* ── Footer ── */
.footer {
  background: var(--color-inverse-surface);
  color: var(--color-inverse-on-surface);
  padding: 3rem 1.5rem 1.5rem;
}
.footer__inner {
  max-width: var(--content-max);
  margin: 0 auto;
}
.footer__grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(180px, 1fr));
  gap: 2rem;
  margin-bottom: 2.5rem;
}
.footer__col h4 {
  font-family: var(--font-headline);
  font-size: 0.875rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.08em;
  margin-bottom: 1rem;
  color: var(--color-inverse-on-surface);
  opacity: 0.7;
}
.footer__col ul { list-style: none; display: flex; flex-direction: column; gap: 0.5rem; }
.footer__col a {
  font-size: 0.875rem;
  color: var(--color-inverse-on-surface);
  opacity: 0.85;
  transition: opacity 0.15s;
}
.footer__col a:hover { opacity: 1; }
.footer__bottom {
  border-top: 1px solid rgba(240, 240, 251, 0.1);
  padding-top: 1.25rem;
  display: flex;
  align-items: center;
  justify-content: space-between;
  flex-wrap: wrap;
  gap: 0.5rem;
}
.footer__bottom p {
  font-size: 0.8125rem;
  color: var(--color-inverse-on-surface);
  opacity: 0.6;
}

/* ── NordVPN Sidebar Banner ── */
.nordvpn-banner {
  background: linear-gradient(135deg, #4687ff 0%, #003e9b 100%);
  border-radius: var(--radius-lg);
  padding: 1.25rem;
  color: #fff;
  text-align: center;
}
.nordvpn-banner h4 {
  font-family: var(--font-headline);
  font-size: 1rem;
  font-weight: 800;
  color: #fff;
  margin-bottom: 0.25rem;
}
.nordvpn-banner p { font-size: 0.8125rem; opacity: 0.9; margin-bottom: 1rem; }
.nordvpn-banner a {
  display: inline-block;
  background: #fff;
  color: #003e9b;
  font-weight: 700;
  font-size: 0.875rem;
  padding: 0.5rem 1.25rem;
  border-radius: var(--radius-full);
}

/* ── Utility Classes ── */
.hidden { display: none !important; }
.text-center { text-align: center; }
.mt-1 { margin-top: 0.5rem; }
.mt-2 { margin-top: 1rem; }
.mt-3 { margin-top: 1.5rem; }
.mt-4 { margin-top: 2rem; }

/* ── Compression Option Cards ── */
.compression-options {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 0.75rem;
  margin: 1.25rem 0;
}
.compression-option {
  background: var(--color-surface-container);
  border-radius: var(--radius-md);
  padding: 1rem;
  cursor: pointer;
  transition: background 0.15s;
  text-align: center;
}
.compression-option:hover { background: var(--color-surface-high); }
.compression-option.active {
  background: var(--color-surface-lowest);
  box-shadow: 0 0 0 2px var(--color-primary);
}
.compression-option__level {
  font-family: var(--font-headline);
  font-size: 0.9375rem;
  font-weight: 700;
  margin-bottom: 0.25rem;
}
.compression-option__desc {
  font-size: 0.75rem;
  color: var(--color-on-surface-variant);
}

/* ── Merge File List ── */
.merge-list {
  list-style: none;
  display: flex;
  flex-direction: column;
  gap: 0.5rem;
  margin: 1rem 0;
}
.merge-list__item {
  background: var(--color-surface-container);
  border-radius: var(--radius-md);
  padding: 0.75rem 1rem;
  display: flex;
  align-items: center;
  gap: 0.875rem;
  cursor: grab;
  transition: background 0.15s;
}
.merge-list__item:active { cursor: grabbing; }
.merge-list__item.drag-target { background: var(--color-surface-high); }
.merge-list__drag {
  font-family: 'Material Symbols Outlined';
  font-size: 1.25rem;
  color: var(--color-on-surface-variant);
}
.merge-list__icon {
  font-family: 'Material Symbols Outlined';
  font-size: 1.25rem;
  color: var(--color-primary);
}
.merge-list__name {
  flex: 1;
  font-size: 0.9375rem;
  font-weight: 500;
  white-space: nowrap;
  overflow: hidden;
  text-overflow: ellipsis;
}
.merge-list__meta {
  font-size: 0.8125rem;
  color: var(--color-on-surface-variant);
  white-space: nowrap;
}
.merge-list__remove {
  font-family: 'Material Symbols Outlined';
  font-size: 1.125rem;
  color: var(--color-on-surface-variant);
  background: none;
  border: none;
  cursor: pointer;
  padding: 0.25rem;
  border-radius: var(--radius-sm);
  line-height: 1;
}
.merge-list__remove:hover { background: var(--color-surface-high); color: var(--color-error); }

/* ── Responsive ── */
@media (max-width: 900px) {
  .page-layout,
  .home-layout {
    grid-template-columns: 1fr;
  }
  .page-sidebar { position: static; }
  .nav__links { display: none; }
}

@media (max-width: 600px) {
  .nav { padding: 0 1rem; gap: 0.75rem; }
  .page-layout,
  .home-layout { padding: 0 1rem 3rem; }
  .hero { padding: 2rem 0 1.5rem; }
  .hero h1 { font-size: 1.75rem; }
  .hero__search { flex-direction: column; border-radius: var(--radius-lg); }
  .hero__search button { padding: 0.75rem; border-radius: 0 0 var(--radius-lg) var(--radius-lg); }
  .compression-options { grid-template-columns: 1fr; }
  .tool-canvas { padding: 1.25rem; }
}