/* Smart2Office — style.css */

/* ── NAV / HEADER ── */
.s2o-header {
  position: sticky; top: 0; z-index: 100;
  background: var(--bg); border-bottom: 1px solid var(--border);
  backdrop-filter: blur(12px); -webkit-backdrop-filter: blur(12px);
}
.s2o-header-inner {
  display: flex; align-items: center; gap: 0.75rem;
  height: 58px; max-width: 1280px;
  margin: 0 auto; padding: 0 1rem;
}
@media (min-width:1024px) { .s2o-header-inner { padding: 0 1.5rem; } }

.s2o-logo { display: flex; align-items: center; gap: 0.5rem; text-decoration: none; }
.s2o-logo-mark {
  width: 34px; height: 34px; border-radius: 9px;
  background: var(--primary); color: var(--primary-text);
  display: flex; align-items: center; justify-content: center;
  font-family: 'Clash Display', system-ui, sans-serif;
  font-weight: 700; font-size: 12px; flex-shrink: 0;
}
.s2o-logo-text {
  font-family: 'Clash Display', system-ui, sans-serif;
  font-weight: 700; font-size: 17px; color: var(--text-primary);
}
.s2o-logo-text span { color: var(--primary); }

.s2o-nav { display: none; align-items: center; gap: 0.1rem; }
@media (min-width:768px) { .s2o-nav { display: flex; } }

.s2o-nav a, .s2o-nav-btn {
  padding: 0.4rem 0.7rem; border-radius: 0.55rem;
  font-size: 0.875rem; color: var(--text-secondary);
  transition: color 0.2s, background 0.2s;
  background: none; border: none; cursor: pointer;
  text-decoration: none; white-space: nowrap;
}
.s2o-nav a:hover, .s2o-nav-btn:hover,
.s2o-nav a.active { color: var(--text-primary); background: var(--surface); }

/* Categories dropdown */
.s2o-dropdown { position: relative; }
.s2o-dropdown-menu {
  position: absolute; top: calc(100% + 6px); left: 0;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 0.85rem; padding: 0.4rem;
  min-width: 210px; box-shadow: var(--shadow);
  display: none; flex-direction: column; gap: 0.1rem; z-index: 200;
}
.s2o-dropdown-menu.open { display: flex; }
.s2o-dropdown-menu a {
  padding: 0.5rem 0.85rem; border-radius: 0.55rem;
  font-size: 0.86rem; color: var(--text-secondary);
  transition: background 0.15s, color 0.15s; text-decoration: none;
}
.s2o-dropdown-menu a:hover { background: var(--surface); color: var(--text-primary); }

/* Search */
.s2o-search-wrap {
  position: relative; flex: 1; max-width: 300px; margin-left: auto;
}
.s2o-search-input {
  width: 100%; padding: 0.45rem 0.9rem 0.45rem 2.2rem;
  border-radius: 999px; background: var(--surface);
  border: 1px solid var(--border); color: var(--text-primary);
  font-size: 0.85rem; outline: none; transition: border-color 0.2s;
  font-family: inherit;
}
.s2o-search-input:focus { border-color: var(--primary); }
.s2o-search-icon {
  position: absolute; left: 0.75rem; top: 50%; transform: translateY(-50%);
  color: var(--text-secondary); pointer-events: none; font-size: 0.8rem;
}
.s2o-search-results {
  position: absolute; top: calc(100% + 6px); left: 0; right: 0;
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 0.85rem; box-shadow: var(--shadow);
  display: none; flex-direction: column; z-index: 300; overflow: hidden;
  max-height: 380px; overflow-y: auto;
}
.s2o-search-results.open { display: flex; }
.s2o-search-item {
  padding: 0.6rem 0.9rem; font-size: 0.85rem;
  color: var(--text-primary); text-decoration: none;
  transition: background 0.15s; border-bottom: 1px solid var(--border);
  display: flex; align-items: center; gap: 0.5rem;
}
.s2o-search-item:last-child { border-bottom: none; }
.s2o-search-item:hover, .s2o-search-item:focus { background: var(--surface); outline: none; }

/* Header actions */
.s2o-header-actions { display: flex; align-items: center; gap: 0.4rem; flex-shrink: 0; }
.s2o-theme-btn {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 50%; width: 34px; height: 34px;
  display: flex; align-items: center; justify-content: center;
  cursor: pointer; color: var(--text-secondary); font-size: 0.9rem;
  transition: all 0.2s;
}
.s2o-theme-btn:hover { border-color: var(--primary); color: var(--primary); }

/* Hamburger */
.s2o-menu-btn {
  display: flex; flex-direction: column; gap: 4px;
  background: none; border: none; cursor: pointer; padding: 4px;
}
@media (min-width:768px) { .s2o-menu-btn { display: none; } }
.s2o-menu-btn span { width: 20px; height: 2px; background: var(--text-primary); border-radius: 2px; transition: all 0.2s; }

/* Mobile nav */
.s2o-mobile-nav {
  display: none; flex-direction: column; gap: 0.2rem;
  padding: 0.75rem 1rem; border-top: 1px solid var(--border); background: var(--bg);
}
.s2o-mobile-nav.open { display: flex; }
.s2o-mobile-nav a {
  padding: 0.5rem 0.7rem; border-radius: 0.55rem;
  color: var(--text-secondary); text-decoration: none; font-size: 0.875rem;
  transition: background 0.15s;
}
.s2o-mobile-nav a:hover { background: var(--surface); color: var(--text-primary); }
.s2o-mobile-cat {
  font-size: 0.72rem; font-weight: 600; text-transform: uppercase;
  letter-spacing: 0.05em; color: var(--text-secondary); padding: 0.5rem 0.7rem 0.2rem;
}

/* ── FOOTER ── */
.s2o-footer {
  margin-top: auto; background: var(--surface);
  border-top: 1px solid var(--border); padding: 2.5rem 1rem 1.5rem;
}
.s2o-footer-grid {
  max-width: 1280px; margin: 0 auto;
  display: grid; grid-template-columns: 1fr; gap: 1.75rem;
}
@media (min-width:640px) { .s2o-footer-grid { grid-template-columns: 2fr 1fr 1fr 1fr; } }
@media (min-width:1024px) { .s2o-footer-grid { padding: 0 1.5rem; } }
.s2o-footer-brand p { color: var(--text-secondary); font-size: 0.85rem; line-height: 1.6; margin-top: 0.65rem; }
.s2o-footer-col h4 { font-size: 0.78rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--text-secondary); margin-bottom: 0.6rem; }
.s2o-footer-col ul { list-style: none; margin: 0; padding: 0; display: flex; flex-direction: column; gap: 0.35rem; }
.s2o-footer-col ul li a { color: var(--text-secondary); font-size: 0.85rem; text-decoration: none; transition: color 0.2s; }
.s2o-footer-col ul li a:hover { color: var(--primary); }
.s2o-footer-bottom {
  max-width: 1280px; margin: 1.5rem auto 0;
  padding-top: 1.25rem; border-top: 1px solid var(--border);
  display: flex; flex-wrap: wrap; gap: 0.5rem;
  justify-content: space-between; align-items: center;
}
@media (min-width:1024px) { .s2o-footer-bottom { padding-left: 1.5rem; padding-right: 1.5rem; } }
.s2o-footer-bottom p { color: var(--text-secondary); font-size: 0.78rem; }
.s2o-footer-bottom a { color: var(--text-secondary); text-decoration: none; }
.s2o-footer-bottom a:hover { color: var(--primary); }

/* ── HERO ── */
.s2o-hero {
  padding: 4rem 1rem 3rem; text-align: center;
  position: relative; overflow: hidden;
}
@media (min-width:768px) { .s2o-hero { padding: 5rem 1.5rem 4rem; } }
.s2o-hero-grid-bg {
  position: absolute; inset: 0; pointer-events: none;
  background-image: linear-gradient(var(--border) 1px, transparent 1px),
                    linear-gradient(90deg, var(--border) 1px, transparent 1px);
  background-size: 56px 56px;
  mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
  -webkit-mask-image: radial-gradient(ellipse at center, black 0%, transparent 70%);
  opacity: 0.5;
}
.s2o-hero h1 { font-size: clamp(2rem, 5vw, 3.25rem); line-height: 1.15; margin-bottom: 0.85rem; }
.s2o-hero p { font-size: 1.05rem; color: var(--text-secondary); max-width: 540px; margin: 0 auto 1.75rem; line-height: 1.6; }
.s2o-hero-tags { display: flex; flex-wrap: wrap; gap: 0.4rem; justify-content: center; margin-bottom: 0; }

/* ── SECTIONS ── */
.s2o-section { padding: 2rem 1rem; max-width: 1280px; margin: 0 auto; }
@media (min-width:768px)  { .s2o-section { padding: 2.25rem 1.25rem; } }
@media (min-width:1024px) { .s2o-section { padding: 2.5rem 1.5rem; } }

.s2o-section-header { display: flex; align-items: baseline; gap: 0.75rem; margin-bottom: 1.1rem; flex-wrap: wrap; }
.s2o-section-header h2 { font-size: 1.25rem; }
.s2o-section-header a { font-size: 0.83rem; color: var(--primary); margin-left: auto; text-decoration: none; }
.s2o-section-header a:hover { text-decoration: underline; }
.s2o-badge { font-size: 0.68rem; font-weight: 600; background: var(--primary); color: var(--primary-text); padding: 0.18rem 0.5rem; border-radius: 999px; }

/* Tool grid */
.s2o-tool-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(165px, 1fr)); gap: 0.75rem; }
.s2o-tool-card {
  background: var(--bg); border: 1px solid var(--border); border-radius: 0.9rem;
  padding: 1.1rem 0.9rem; text-decoration: none; color: inherit;
  transition: all 0.22s ease; display: flex; flex-direction: column; gap: 0.4rem;
}
.s2o-tool-card:hover { transform: translateY(-2px); border-color: var(--primary); box-shadow: var(--shadow); }
.s2o-tool-icon { font-size: 1.5rem; }
.s2o-tool-name { font-weight: 600; font-size: 0.875rem; line-height: 1.3; }
.s2o-tool-desc { font-size: 0.78rem; color: var(--text-secondary); line-height: 1.4; }

/* ── CATEGORY PAGE ── */
.s2o-cat-header {
  padding: 2.5rem 1rem 1.75rem; text-align: center;
  border-bottom: 1px solid var(--border);
}
.s2o-cat-header h1 { font-size: 1.85rem; margin-bottom: 0.4rem; }
.s2o-cat-header p { color: var(--text-secondary); font-size: 0.95rem; }
.s2o-cat-icon { font-size: 2.25rem; margin-bottom: 0.6rem; }

/* ── TOOL PAGE ── */
.s2o-tool-page { max-width: 820px; margin: 0 auto; padding: 2rem 1rem 3.5rem; }
@media (min-width:768px) { .s2o-tool-page { padding: 2.25rem 1.25rem 4rem; } }
.s2o-tool-page-header { margin-bottom: 1.5rem; }
.s2o-tool-page-header h1 { font-size: clamp(1.4rem, 3vw, 2rem); margin-bottom: 0.35rem; }
.s2o-tool-page-header p { color: var(--text-secondary); font-size: 0.92rem; line-height: 1.6; }

.s2o-breadcrumb {
  display: flex; gap: 0.35rem; align-items: center;
  font-size: 0.78rem; color: var(--text-secondary); margin-bottom: 0.85rem; flex-wrap: wrap;
}
.s2o-breadcrumb a { color: var(--text-secondary); text-decoration: none; }
.s2o-breadcrumb a:hover { color: var(--primary); }

/* Tool action area */
.s2o-tool-area {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 1.1rem; padding: 1.5rem; margin-bottom: 1.5rem;
}
.s2o-tool-status { margin-top: 0.85rem; font-size: 0.85rem; color: var(--text-secondary); line-height: 1.5; }
.s2o-result {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 0.7rem; padding: 1.1rem; font-size: 1rem; line-height: 1.6;
}
.s2o-result strong { color: var(--primary); font-size: 1.15rem; }
.s2o-pre {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 0.7rem; padding: 0.9rem;
  font-family: 'JetBrains Mono', monospace; font-size: 0.83rem;
  overflow-x: auto; white-space: pre-wrap; word-break: break-all;
}
.s2o-error { color: #b91c1c; font-size: 0.875rem; }
.s2o-note { font-size: 0.78rem; color: var(--text-secondary); margin-top: 0.4rem; }

/* Stats grid */
.s2o-stat-grid { display: flex; flex-wrap: wrap; gap: 0.75rem; }
.s2o-stat {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 0.7rem; padding: 0.75rem 1.1rem;
  display: flex; flex-direction: column; gap: 0.15rem; min-width: 110px;
}
.s2o-stat b { font-size: 1.3rem; font-family: 'Clash Display', system-ui, sans-serif; color: var(--primary); }
.s2o-stat span { font-size: 0.73rem; color: var(--text-secondary); }

/* Palette / color */
.s2o-palette { display: flex; gap: 0.4rem; flex-wrap: wrap; margin-top: 0.5rem; }
.s2o-palette-swatch { width: 54px; height: 54px; border-radius: 0.65rem; border: 1px solid var(--border); }
#colorSwatch { width: 100%; height: 72px; border-radius: 0.7rem; border: 1px solid var(--border); margin-bottom: 0.85rem; transition: background 0.2s; }

/* Unit grid */
.s2o-unit-grid { display: grid; grid-template-columns: 1fr auto 1fr; gap: 0.85rem; align-items: end; margin-bottom: 0.85rem; }
@media (max-width:480px) { .s2o-unit-grid { grid-template-columns: 1fr; } }
.s2o-unit-arrow { font-size: 1.3rem; text-align: center; color: var(--primary); padding-bottom: 0.5rem; }

/* Calculator */
.s2o-calc-grid { display: grid; gap: 0.85rem; margin-bottom: 1.1rem; }
.s2o-label { font-size: 0.83rem; font-weight: 500; margin-bottom: 0.3rem; display: block; color: var(--text-secondary); }
.s2o-field-group { display: flex; flex-direction: column; }

/* Formatter */
#toolInput {
  width: 100%; min-height: 170px; resize: vertical;
  padding: 0.75rem 0.9rem; border-radius: 0.7rem;
  background: var(--bg); border: 1px solid var(--border); color: var(--text-primary);
  font-family: 'JetBrains Mono', monospace; font-size: 0.83rem;
  outline: none; transition: border-color 0.2s;
}
#toolInput:focus { border-color: var(--primary); }
.s2o-btn-row { display: flex; flex-wrap: wrap; gap: 0.45rem; margin: 0.65rem 0; }

/* Case converter */
.s2o-case-grid { display: flex; flex-wrap: wrap; gap: 0.4rem; margin-bottom: 0.85rem; }

/* How-to / formula */
.s2o-info-section { margin-bottom: 1.5rem; }
.s2o-info-section h2 { font-size: 1.1rem; margin-bottom: 0.65rem; }
.s2o-steps { display: flex; flex-direction: column; gap: 0.5rem; }
.s2o-step {
  display: flex; gap: 0.65rem; align-items: flex-start;
  padding: 0.65rem 0.9rem; background: var(--surface);
  border-radius: 0.7rem; border: 1px solid var(--border);
}
.s2o-step-num {
  width: 20px; height: 20px; border-radius: 50%; flex-shrink: 0;
  background: var(--primary); color: var(--primary-text);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.68rem; font-weight: 700; margin-top: 2px;
}
.s2o-formula {
  background: var(--surface); border: 1px solid var(--border);
  border-left: 3px solid var(--primary); border-radius: 0.7rem;
  padding: 0.9rem 1.1rem; font-family: 'JetBrains Mono', monospace; font-size: 0.85rem;
}

/* Related tools & blogs */
.s2o-related { margin-top: 2rem; }
.s2o-related h2 { font-size: 1.05rem; margin-bottom: 0.75rem; }
.s2o-related-grid { display: flex; flex-wrap: wrap; gap: 0.5rem; }
.s2o-related-chip {
  padding: 0.4rem 0.85rem; border-radius: 999px;
  background: var(--surface); border: 1px solid var(--border);
  font-size: 0.8rem; color: var(--text-secondary); text-decoration: none;
  transition: all 0.18s;
}
.s2o-related-chip:hover { border-color: var(--primary); color: var(--primary); }

/* ── BLOG ── */
.s2o-blog-header {
  padding: 2.5rem 1rem 1.75rem; text-align: center;
  border-bottom: 1px solid var(--border);
}
.s2o-blog-header h1 { font-size: 1.85rem; margin-bottom: 0.4rem; }
.s2o-blog-header p { color: var(--text-secondary); }
.s2o-blog-grid { display: grid; grid-template-columns: repeat(auto-fill, minmax(268px, 1fr)); gap: 1.1rem; }
.s2o-blog-card {
  background: var(--bg); border: 1px solid var(--border);
  border-radius: 0.9rem; overflow: hidden; text-decoration: none; color: inherit;
  transition: all 0.22s ease; display: flex; flex-direction: column;
}
.s2o-blog-card:hover { transform: translateY(-2px); border-color: var(--primary); box-shadow: var(--shadow); }
.s2o-blog-card-img { width: 100%; height: 152px; object-fit: cover; display: block; }
.s2o-blog-card-body { padding: 1.1rem; flex: 1; display: flex; flex-direction: column; gap: 0.35rem; }
.s2o-blog-cat { font-size: 0.7rem; font-weight: 600; text-transform: uppercase; letter-spacing: 0.06em; color: var(--primary); }
.s2o-blog-title { font-weight: 700; font-size: 0.92rem; line-height: 1.35; }
.s2o-blog-excerpt { font-size: 0.8rem; color: var(--text-secondary); line-height: 1.5; flex: 1; }
.s2o-blog-meta { font-size: 0.73rem; color: var(--text-secondary); margin-top: 0.4rem; }

/* Blog post page */
.s2o-blog-post { max-width: 730px; margin: 0 auto; padding: 2rem 1rem 3.5rem; }
@media (min-width:768px) { .s2o-blog-post { padding: 2.25rem 1.25rem 4rem; } }
.s2o-blog-post-hero { width: 100%; border-radius: 0.9rem; object-fit: cover; height: 260px; display: block; margin-bottom: 1.75rem; }
.s2o-blog-post h1 { font-size: clamp(1.4rem, 3vw, 1.9rem); margin-bottom: 0.65rem; line-height: 1.25; }
.s2o-blog-post-meta { color: var(--text-secondary); font-size: 0.83rem; margin-bottom: 1.75rem; display: flex; gap: 0.85rem; flex-wrap: wrap; }
.s2o-blog-body { color: var(--text-secondary); line-height: 1.75; font-size: 0.95rem; }
.s2o-blog-body p { margin-bottom: 0.9rem; }
.s2o-blog-body h2 { font-size: 1.25rem; color: var(--text-primary); margin: 1.75rem 0 0.65rem; }
.s2o-blog-body h3 { font-size: 1.05rem; color: var(--text-primary); margin: 1.35rem 0 0.45rem; }
.s2o-blog-body ul { margin: 0.4rem 0 0.9rem 1.15rem; }
.s2o-blog-body li { margin-bottom: 0.3rem; }

/* CTA banner */
.s2o-tool-cta {
  background: var(--surface); border: 1px solid var(--border);
  border-radius: 0.9rem; padding: 1.25rem; margin: 2rem 0;
  display: flex; flex-wrap: wrap; gap: 0.85rem; align-items: center;
}
.s2o-tool-cta div { flex: 1; min-width: 180px; }
.s2o-tool-cta h3 { font-size: 0.95rem; margin-bottom: 0.25rem; }
.s2o-tool-cta p { font-size: 0.82rem; color: var(--text-secondary); }

/* ── STATIC PAGES ── */
.s2o-static-page { max-width: 720px; margin: 0 auto; padding: 2.5rem 1rem 4rem; }
@media (min-width:768px) { .s2o-static-page { padding: 2.5rem 1.25rem 4rem; } }
.s2o-static-page h1 { font-size: 1.85rem; margin-bottom: 0.45rem; }
.s2o-static-page .lead { color: var(--text-secondary); font-size: 0.97rem; line-height: 1.65; margin-bottom: 2rem; }
.s2o-static-page h2 { font-size: 1.15rem; margin: 1.75rem 0 0.5rem; }
.s2o-static-page p, .s2o-static-page li { color: var(--text-secondary); line-height: 1.7; font-size: 0.93rem; }
.s2o-static-page ul { margin: 0.4rem 0 0.9rem 1.15rem; }

/* Contact form */
.s2o-contact-form { display: flex; flex-direction: column; gap: 0.85rem; margin-top: 1.25rem; }
.s2o-form-row { display: grid; gap: 0.85rem; }
@media (min-width:600px) { .s2o-form-row { grid-template-columns: 1fr 1fr; } }
#contactNote { display: none; margin-top: 0.65rem; padding: 0.65rem 0.9rem; border-radius: 0.7rem; background: var(--surface); border: 1px solid var(--primary); font-size: 0.85rem; color: var(--text-secondary); }
#contactNote.show { display: block; }

/* ── DROPZONE ── */
.s2o-dropzone {
  border: 2px dashed var(--border); border-radius: 0.9rem;
  padding: 2rem 1.25rem; text-align: center; cursor: pointer;
  transition: border-color 0.2s, background 0.2s; background: var(--bg);
}
.s2o-dropzone:hover, .s2o-dropzone.drag { border-color: var(--primary); background: var(--surface); }

/* Chips */
.s2o-chip {
  display: inline-flex; align-items: center; gap: .3rem;
  padding: .3rem .7rem; border-radius: 999px;
  background: var(--surface); border: 1px solid var(--border);
  font-size: 0.8rem; color: var(--text-secondary);
}

/* Inputs */
.s2o-input {
  width: 100%; padding: 0.55rem 0.85rem; border-radius: 0.6rem;
  background: var(--bg); border: 1px solid var(--border);
  color: var(--text-primary); font-size: 0.875rem; outline: none;
  transition: border-color .2s; font-family: inherit;
}
.s2o-input:focus { border-color: var(--primary); }
select.s2o-input { cursor: pointer; }
textarea.s2o-input { resize: vertical; }

/* ── UTILITIES ── */
.flex-center { display: flex; align-items: center; justify-content: center; }
.mt-2 { margin-top: 0.4rem; }
.mt-4 { margin-top: 0.85rem; }
.mb-4 { margin-bottom: 0.85rem; }
.text-center { text-align: center; }
.s2o-divider { border: none; border-top: 1px solid var(--border); margin: 1.5rem 0; }
.s2o-page-wrap { min-height: 100vh; display: flex; flex-direction: column; }
.s2o-content { flex: 1; }
.tagline { color: var(--primary); font-weight: 600; }
.mono { font-family: 'JetBrains Mono', monospace; font-size: 0.85em; background: var(--surface); padding: 0.1em 0.4em; border-radius: 0.3em; }