/* ============================================================
   Sections: About, Security, Portfolio, Founder, Contact, Footer
   ============================================================ */

/* ── ABOUT TRUSTDESK ─────────────────────────────────────── */
.about-section { background: var(--gray-50); }

.philosophy-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-4);
  margin-top: var(--space-10);
}
.philosophy-item {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: var(--space-5);
  transition: all var(--t-base);
  position: relative;
  overflow: hidden;
}
.philosophy-item::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--blue-700), var(--green-700));
  opacity: 0;
  transition: opacity var(--t-base);
}
.philosophy-item:hover { box-shadow: var(--shadow-md); transform: translateY(-2px); }
.philosophy-item:hover::before { opacity: 1; }

.phi-icon {
  width: 40px; height: 40px;
  border-radius: var(--r-sm);
  background: var(--blue-50);
  border: 1px solid var(--blue-100);
  display: flex;
  align-items: center;
  justify-content: center;
  margin-bottom: var(--space-4);
  color: var(--blue-700);
}
.phi-title  { font-size: 0.9rem; font-weight: 700; margin-bottom: 4px; }
.phi-desc   { font-size: 0.8rem; color: var(--text-secondary); line-height: 1.55; }

.about-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: start;
  margin-top: var(--space-16);
}
.about-left .section-desc { max-width: 100%; }
.about-feature-list { margin-top: var(--space-8); display: flex; flex-direction: column; gap: var(--space-3); }
.about-feature {
  display: flex;
  align-items: flex-start;
  gap: var(--space-3);
  padding: var(--space-4);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--white);
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
}
.about-feature:hover { border-color: var(--blue-200, #c7d7ff); box-shadow: var(--shadow-sm); }
.af-icon {
  width: 32px; height: 32px;
  border-radius: var(--r-sm);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  font-size: 0.9rem;
}
.af-icon-blue  { background: var(--blue-50); color: var(--blue-700); }
.af-icon-green { background: var(--green-50); color: var(--green-700); }
.af-body .fw-semi { font-size: 0.9rem; margin-bottom: 2px; display: block; }
.af-body p { font-size: 0.82rem; color: var(--text-secondary); line-height: 1.5; }

.about-right-visual {
  position: sticky;
  top: calc(var(--nav-h) + var(--space-6));
}
.about-code-card {
  background: var(--gray-900);
  border-radius: var(--r-lg);
  overflow: hidden;
  box-shadow: var(--shadow-xl);
}
.code-titlebar {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-5);
  border-bottom: 1px solid rgba(255,255,255,0.06);
  background: var(--gray-800);
}
.code-dot {
  width: 10px; height: 10px;
  border-radius: 50%;
}
.code-dot-red    { background: #ff5f56; }
.code-dot-yellow { background: #ffbd2e; }
.code-dot-green  { background: #27c93f; }
.code-filename   { font-family: var(--font-mono); font-size: 0.78rem; color: var(--gray-400); margin-left: auto; }
.code-body {
  padding: var(--space-6);
  font-family: var(--font-mono);
  font-size: 0.82rem;
  line-height: 1.8;
  color: #abb2bf;
  overflow-x: auto;
}
.code-comment { color: #5c6370; }
.code-keyword { color: #c678dd; }
.code-string  { color: #98c379; }
.code-type    { color: #e5c07b; }
.code-method  { color: #61afef; }
.code-num     { color: #d19a66; }
.code-op      { color: #56b6c2; }

@media (max-width: 1024px) {
  .philosophy-grid { grid-template-columns: repeat(2, 1fr); }
  .about-layout { grid-template-columns: 1fr; }
  .about-right-visual { position: static; }
}
@media (max-width: 640px) {
  .philosophy-grid { grid-template-columns: 1fr; }
}

/* ── SECURITY ────────────────────────────────────────────── */
.security-section {
  background: var(--white);
  position: relative;
  overflow: hidden;
}
.security-section::before {
  content: '';
  position: absolute;
  inset: 0;
  background: radial-gradient(ellipse 70% 50% at 100% 50%, rgba(22,163,74,0.04) 0%, transparent 70%);
  pointer-events: none;
}

.security-layout {
  display: grid;
  grid-template-columns: 380px 1fr;
  gap: var(--space-16);
  align-items: start;
  margin-top: var(--space-12);
}

.security-principles {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.sec-item {
  display: flex;
  gap: var(--space-4);
  padding: var(--space-5);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  background: var(--white);
  transition: all var(--t-base);
  cursor: default;
}
.sec-item:hover {
  border-color: var(--blue-100);
  box-shadow: var(--shadow-md);
  transform: translateX(4px);
}
.sec-num {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: var(--blue-50);
  border: 1.5px solid var(--blue-100);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.78rem;
  font-weight: 700;
  color: var(--blue-700);
  font-family: var(--font-mono);
  flex-shrink: 0;
  margin-top: 2px;
}
.sec-body {}
.sec-title {
  font-size: 0.92rem;
  font-weight: 700;
  margin-bottom: 4px;
  color: var(--gray-800);
}
.sec-desc {
  font-size: 0.81rem;
  color: var(--text-secondary);
  line-height: 1.55;
}

.security-right {}
.arch-diagram {
  background: var(--gray-50);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: var(--space-8);
}
.arch-title { font-size: 0.85rem; font-weight: 700; color: var(--gray-700); margin-bottom: var(--space-6); display: flex; align-items: center; gap: var(--space-2); }
.arch-title svg { color: var(--blue-700); }

.arch-stack {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
}
.arch-layer {
  padding: var(--space-4) var(--space-5);
  border-radius: var(--r-md);
  border: 1.5px solid;
  display: flex;
  align-items: center;
  justify-content: space-between;
  font-size: 0.85rem;
  font-weight: 600;
  transition: transform var(--t-fast), box-shadow var(--t-fast);
}
.arch-layer:hover { transform: scale(1.01); box-shadow: var(--shadow-sm); }
.arch-layer-blue  { background: var(--blue-50);  border-color: var(--blue-100);  color: var(--blue-800); }
.arch-layer-green { background: var(--green-50); border-color: var(--green-100); color: var(--green-900); }
.arch-layer-gray  { background: var(--gray-100); border-color: var(--gray-200);  color: var(--gray-700); }
.arch-layer-tag {
  font-size: 0.7rem;
  font-family: var(--font-mono);
  font-weight: 500;
  opacity: 0.7;
}
.arch-connector {
  display: flex;
  justify-content: center;
  padding: 2px 0;
  color: var(--gray-300);
  font-size: 1rem;
}

.sec-badges {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-top: var(--space-6);
}

@media (max-width: 1024px) {
  .security-layout { grid-template-columns: 1fr; }
}

/* ── PORTFOLIO ───────────────────────────────────────────── */
.portfolio-section { background: var(--gray-50); }

.portfolio-filter {
  display: flex;
  gap: var(--space-2);
  flex-wrap: wrap;
  margin-bottom: var(--space-8);
}
.filter-btn {
  padding: 6px 16px;
  border-radius: var(--r-full);
  font-size: 0.82rem;
  font-weight: 600;
  border: 1.5px solid var(--border-strong);
  color: var(--gray-600);
  background: var(--white);
  transition: all var(--t-fast);
}
.filter-btn:hover  { border-color: var(--blue-700); color: var(--blue-700); }
.filter-btn.active { background: var(--blue-700); border-color: var(--blue-700); color: var(--white); }

.apps-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-5);
}

.app-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-lg);
  padding: var(--space-5);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: all var(--t-base);
  position: relative;
  overflow: hidden;
}
.app-card::before {
  content: '';
  position: absolute;
  top: 0; left: 0; right: 0;
  height: 3px;
  background: linear-gradient(90deg, var(--blue-700), var(--green-700));
  opacity: 0;
  transition: opacity var(--t-base);
}
.app-card:hover {
  box-shadow: var(--shadow-lg);
  transform: translateY(-4px);
  border-color: transparent;
}
.app-card:hover::before { opacity: 1; }

.app-card-header {
  display: flex;
  align-items: flex-start;
  justify-content: space-between;
}
.app-icon {
  width: 48px; height: 48px;
  border-radius: var(--r-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 1.4rem;
  flex-shrink: 0;
}
.app-name {
  font-size: 0.95rem;
  font-weight: 700;
  color: var(--gray-900);
  letter-spacing: -0.01em;
  line-height: 1.3;
  margin-top: var(--space-3);
  margin-bottom: var(--space-2);
}
.app-desc {
  font-size: 0.8rem;
  color: var(--text-secondary);
  line-height: 1.6;
  flex: 1;
}
.app-card-footer {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-3);
  border-top: 1px solid var(--gray-100);
  gap: var(--space-2);
}

/* Icon bg colors */
.icon-bg-1 { background: #eff6ff; }
.icon-bg-2 { background: #f0fdf4; }
.icon-bg-3 { background: #fff7ed; }
.icon-bg-4 { background: #fdf4ff; }
.icon-bg-5 { background: #fef2f2; }
.icon-bg-6 { background: #f0f9ff; }

/* Hidden filter */
.app-card[data-hidden="true"] {
  display: none;
}

@media (max-width: 1100px) { .apps-grid { grid-template-columns: repeat(3, 1fr); } }
@media (max-width: 800px)  { .apps-grid { grid-template-columns: repeat(2, 1fr); } }
@media (max-width: 520px)  { .apps-grid { grid-template-columns: 1fr; } }

/* ── FOUNDER ─────────────────────────────────────────────── */
.founder-section { background: var(--white); }

.founder-layout {
  display: grid;
  grid-template-columns: 360px 1fr;
  gap: var(--space-16);
  align-items: start;
  margin-top: var(--space-12);
}

.founder-card {
  background: var(--gray-50);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: var(--space-8);
  text-align: center;
  position: sticky;
  top: calc(var(--nav-h) + var(--space-6));
}
.founder-avatar {
  width: 88px; height: 88px;
  border-radius: 50%;
  margin: 0 auto var(--space-4);
  background: linear-gradient(135deg, var(--blue-700) 0%, var(--green-700) 100%);
  display: flex; align-items: center; justify-content: center;
  font-size: 2rem;
  font-weight: 800;
  color: var(--white);
  letter-spacing: -0.03em;
  box-shadow: 0 8px 24px rgba(31,79,216,0.2);
}
.founder-name {
  font-size: 1.25rem;
  font-weight: 700;
  letter-spacing: -0.02em;
  margin-bottom: 4px;
}
.founder-role {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: var(--space-5);
}
.founder-location {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-full);
  padding: 4px 12px;
  font-size: 0.78rem;
  color: var(--gray-600);
  font-weight: 500;
  margin-bottom: var(--space-6);
}
.founder-divider { border: none; border-top: 1px solid var(--border); margin: var(--space-5) 0; }
.founder-stats {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 1px;
  background: var(--border);
  border-radius: var(--r-md);
  overflow: hidden;
  border: 1px solid var(--border);
}
.f-stat {
  background: var(--white);
  padding: var(--space-4);
  text-align: center;
}
.f-stat-value { font-size: 1.4rem; font-weight: 800; letter-spacing: -0.03em; color: var(--blue-700); }
.f-stat-label { font-size: 0.72rem; color: var(--text-muted); font-weight: 500; }

.founder-content {}
.founder-bio {
  font-size: 1.05rem;
  color: var(--gray-600);
  line-height: 1.8;
  margin-bottom: var(--space-8);
}
.founder-section-title {
  font-size: 0.75rem;
  font-weight: 700;
  letter-spacing: 0.08em;
  text-transform: uppercase;
  color: var(--gray-400);
  margin-bottom: var(--space-4);
}

.mission-vision {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-4);
  margin-bottom: var(--space-8);
}
.mv-card {
  padding: var(--space-5);
  border-radius: var(--r-md);
  border: 1px solid;
}
.mv-card-blue  { background: var(--blue-50); border-color: var(--blue-100); }
.mv-card-green { background: var(--green-50); border-color: var(--green-100); }
.mv-icon { font-size: 1.3rem; margin-bottom: var(--space-3); }
.mv-label { font-size: 0.72rem; font-weight: 700; letter-spacing: 0.06em; text-transform: uppercase; margin-bottom: var(--space-2); }
.mv-card-blue .mv-label { color: var(--blue-700); }
.mv-card-green .mv-label { color: var(--green-700); }
.mv-text { font-size: 0.9rem; color: var(--gray-700); line-height: 1.6; font-weight: 500; }

.skills-grid {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-2);
  margin-bottom: var(--space-8);
}
.skill-tag {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  background: var(--gray-50);
  border: 1.5px solid var(--gray-200);
  border-radius: var(--r-full);
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--gray-700);
  transition: all var(--t-fast);
}
.skill-tag:hover {
  background: var(--blue-50);
  border-color: var(--blue-100);
  color: var(--blue-700);
}
.skill-tag .dot {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--blue-700);
  opacity: 0.5;
}

@media (max-width: 1024px) {
  .founder-layout { grid-template-columns: 1fr; }
  .founder-card { position: static; }
  .mission-vision { grid-template-columns: 1fr; }
}

/* ── CONTACT ─────────────────────────────────────────────── */
.contact-section { background: var(--gray-50); }

.contact-layout {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-16);
  align-items: center;
  margin-top: var(--space-12);
}
.contact-points {
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}
.contact-point {
  display: flex;
  gap: var(--space-4);
  align-items: flex-start;
  padding: var(--space-5);
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-md);
  transition: box-shadow var(--t-fast);
}
.contact-point:hover { box-shadow: var(--shadow-sm); }
.cp-icon {
  width: 36px; height: 36px;
  border-radius: var(--r-sm);
  background: var(--blue-50);
  border: 1px solid var(--blue-100);
  color: var(--blue-700);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
}
.cp-label { font-size: 0.75rem; font-weight: 700; color: var(--text-muted); text-transform: uppercase; letter-spacing: 0.06em; margin-bottom: 2px; }
.cp-value { font-size: 0.9rem; font-weight: 600; color: var(--gray-800); }
.cp-value a { transition: color var(--t-fast); }
.cp-value a:hover { color: var(--blue-700); }

.contact-form-card {
  background: var(--white);
  border: 1px solid var(--border);
  border-radius: var(--r-xl);
  padding: var(--space-8);
  box-shadow: var(--shadow-md);
}
.form-title { font-size: 1.1rem; font-weight: 700; margin-bottom: var(--space-6); }
.form-group { margin-bottom: var(--space-4); }
.form-label {
  display: block;
  font-size: 0.82rem;
  font-weight: 600;
  color: var(--gray-700);
  margin-bottom: var(--space-2);
}
.form-input, .form-select, .form-textarea {
  width: 100%;
  padding: 0.65rem 0.9rem;
  border: 1.5px solid var(--border-strong);
  border-radius: var(--r-sm);
  font-size: 0.9rem;
  color: var(--gray-800);
  background: var(--white);
  transition: border-color var(--t-fast), box-shadow var(--t-fast);
  outline: none;
  appearance: none;
}
.form-input:focus, .form-select:focus, .form-textarea:focus {
  border-color: var(--blue-700);
  box-shadow: 0 0 0 3px rgba(31,79,216,0.1);
}
.form-input::placeholder, .form-textarea::placeholder { color: var(--gray-300); }
.form-textarea { resize: vertical; min-height: 100px; }
.form-select { background-image: url("data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' fill='none' viewBox='0 0 20 20'%3e%3cpath stroke='%236b7194' stroke-linecap='round' stroke-linejoin='round' stroke-width='1.5' d='M6 8l4 4 4-4'/%3e%3c/svg%3e"); background-repeat: no-repeat; background-position: right 0.75rem center; background-size: 16px; padding-right: 2.5rem; }

.form-note { font-size: 0.78rem; color: var(--text-muted); margin-top: var(--space-3); }

@media (max-width: 768px) { .contact-layout { grid-template-columns: 1fr; } }

/* ── FOOTER ──────────────────────────────────────────────── */
footer {
  background: var(--gray-900);
  color: var(--gray-400);
  padding: var(--space-16) var(--space-6) var(--space-8);
}
.footer-inner { max-width: var(--max-w); margin: 0 auto; }

.footer-top {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: var(--space-12);
  padding-bottom: var(--space-12);
  border-bottom: 1px solid rgba(255,255,255,0.08);
}
.footer-brand .logo-text { font-size: 1.3rem; }
.footer-brand .logo-trust { color: #6a9af5; }
.footer-brand .logo-desk  { color: #4ade80; }
.footer-tagline {
  font-size: 0.85rem;
  color: var(--gray-500);
  margin-top: var(--space-3);
  line-height: 1.6;
  max-width: 260px;
}
.footer-social { display: flex; gap: var(--space-3); margin-top: var(--space-6); }
.social-link {
  width: 34px; height: 34px;
  border-radius: var(--r-sm);
  border: 1px solid rgba(255,255,255,0.1);
  display: flex; align-items: center; justify-content: center;
  color: var(--gray-400);
  transition: all var(--t-fast);
}
.social-link:hover { background: rgba(255,255,255,0.08); color: var(--white); border-color: rgba(255,255,255,0.2); }

.footer-col-title {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
  text-transform: uppercase;
  color: var(--white);
  margin-bottom: var(--space-5);
}
.footer-links {
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}
.footer-links a {
  font-size: 0.87rem;
  color: var(--gray-500);
  transition: color var(--t-fast);
}
.footer-links a:hover { color: var(--white); }

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: var(--space-8);
  flex-wrap: wrap;
  gap: var(--space-4);
}
.footer-copy { font-size: 0.82rem; color: var(--gray-600); }
.footer-legal {
  display: flex;
  gap: var(--space-6);
}
.footer-legal a {
  font-size: 0.82rem;
  color: var(--gray-600);
  transition: color var(--t-fast);
}
.footer-legal a:hover { color: var(--white); }

@media (max-width: 900px) {
  .footer-top { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 540px) {
  .footer-top { grid-template-columns: 1fr; }
  .footer-bottom { flex-direction: column; align-items: flex-start; }
}

/* ── MISC / SHARED ───────────────────────────────────────── */
.back-to-top {
  position: fixed;
  bottom: var(--space-6); right: var(--space-6);
  width: 44px; height: 44px;
  border-radius: 50%;
  background: var(--blue-700);
  color: var(--white);
  display: flex; align-items: center; justify-content: center;
  box-shadow: var(--shadow-blue);
  opacity: 0;
  transform: translateY(10px);
  pointer-events: none;
  transition: all var(--t-base);
  z-index: 50;
}
.back-to-top.visible { opacity: 1; transform: none; pointer-events: all; }
.back-to-top:hover   { background: var(--blue-800); transform: translateY(-2px); }

/* Cookie notice */
.cookie-notice {
  position: fixed;
  bottom: var(--space-6); left: 50%; transform: translateX(-50%);
  background: var(--gray-900);
  color: var(--gray-300);
  border-radius: var(--r-lg);
  padding: var(--space-4) var(--space-6);
  display: flex;
  align-items: center;
  gap: var(--space-6);
  font-size: 0.83rem;
  box-shadow: var(--shadow-xl);
  z-index: 200;
  max-width: 560px;
  width: calc(100% - var(--space-8));
  opacity: 0;
  transform: translateX(-50%) translateY(20px);
  pointer-events: none;
  transition: all var(--t-slow);
}
.cookie-notice.visible { opacity: 1; transform: translateX(-50%) translateY(0); pointer-events: all; }
.cookie-notice p { flex: 1; line-height: 1.5; }
.cookie-notice strong { color: var(--white); }

/* Section divider accent */
.section-divider {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border), transparent);
}

/* Tooltip */
[data-tooltip] { position: relative; }
[data-tooltip]::after {
  content: attr(data-tooltip);
  position: absolute;
  bottom: 125%;
  left: 50%;
  transform: translateX(-50%) translateY(4px);
  background: var(--gray-800);
  color: var(--white);
  font-size: 0.75rem;
  padding: 4px 10px;
  border-radius: var(--r-sm);
  white-space: nowrap;
  pointer-events: none;
  opacity: 0;
  transition: all var(--t-fast);
}
[data-tooltip]:hover::after {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

/* Focus styles for accessibility */
:focus-visible {
  outline: 2px solid var(--blue-700);
  outline-offset: 2px;
}