/* ================================================================
   PEDRO BUNGA PAULO — SHARED DESIGN SYSTEM
   Todas as páginas referenciam este ficheiro.
   ================================================================ */

/* ── CSS VARIABLES ───────────────────────────────────────────── */
:root {
  --primary:                   #adc6ff;
  --primary-container:         #4b8eff;
  --on-primary:                #002e69;
  --on-primary-container:      #00285c;

  --secondary:                 #c7c6cb;
  --secondary-container:       #46464b;
  --on-secondary-container:    #b5b4ba;

  --tertiary:                  #b3c5ff;
  --tertiary-container:        #5e8bff;
  --on-tertiary:               #002b75;

  --background:                #131313;
  --surface:                   #131313;
  --surface-container-lowest:  #0e0e0e;
  --surface-container-low:     #1c1b1b;
  --surface-container:         #201f1f;
  --surface-container-high:    #2a2a2a;
  --surface-container-highest: #353534;
  --on-surface:                #e5e2e1;
  --on-surface-variant:        #c1c6d7;
  --surface-variant:           #353534;

  --outline:                   #8b90a0;
  --outline-variant:           #414755;

  --error:                     #ffb4ab;
  --success:                   #4ade80;

  --zinc-100: #f4f4f5;
  --zinc-400: #a1a1aa;
  --zinc-500: #71717a;
  --zinc-600: #52525b;
  --zinc-700: #3f3f46;
  --zinc-800: #27272a;
  --zinc-900: #18181b;
  --zinc-950: #09090b;

  --gradient: linear-gradient(135deg, #adc6ff 0%, #4b8eff 100%);
  --gradient-warm: linear-gradient(135deg, #b3c5ff 0%, #5e8bff 50%, #4b8eff 100%);

  --radius-sm:  0.5rem;
  --radius-md:  1rem;
  --radius-lg:  1.5rem;
  --radius-xl:  2rem;
  --radius-2xl: 3rem;
  --radius-full: 9999px;

  --shadow-sm:  0 2px 8px rgba(0,0,0,0.3);
  --shadow-md:  0 8px 24px rgba(0,0,0,0.4);
  --shadow-lg:  0 20px 60px rgba(0,0,0,0.5);
  --shadow-glow: 0 0 40px rgba(173,198,255,0.2);
}

/* ── RESET ───────────────────────────────────────────────────── */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; }
body {
  background: var(--background);
  color: var(--on-surface);
  font-family: 'Inter', sans-serif;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}
h1,h2,h3,h4,h5,h6 { font-family: 'Lexend', sans-serif; }
a { text-decoration: none; color: inherit; }
img { display: block; max-width: 100%; }
button { cursor: pointer; border: none; font-family: inherit; background: none; }
ul { list-style: none; }
::selection { background: var(--primary-container); color: var(--on-primary-container); }

/* ── UTILITIES ───────────────────────────────────────────────── */
.glass-panel {
  background: rgba(53,53,52,0.6);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
}
.kinetic-gradient { background: var(--gradient); }
.text-gradient {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}
.section-label {
  display: block;
  color: var(--primary);
  font-family: 'Inter', sans-serif;
  font-size: 0.7rem;
  letter-spacing: 0.3em;
  text-transform: uppercase;
  font-weight: 700;
  margin-bottom: 1rem;
}
.container {
  max-width: 80rem;
  margin: 0 auto;
  padding: 0 2rem;
}

/* ── BUTTONS ─────────────────────────────────────────────────── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.5rem;
  font-family: 'Lexend', sans-serif;
  font-weight: 700;
  border-radius: var(--radius-md);
  transition: transform 0.15s, box-shadow 0.2s, background 0.2s;
  cursor: pointer;
  border: none;
}
.btn-primary {
  background: var(--gradient);
  color: var(--on-primary);
  padding: 0.875rem 2rem;
  font-size: 0.9rem;
}
.btn-primary:hover { box-shadow: var(--shadow-glow); transform: translateY(-1px); }
.btn-primary:active { transform: scale(0.96); }

.btn-outline {
  background: transparent;
  color: var(--on-surface);
  border: 1.5px solid rgba(65,71,85,0.40);
  padding: 0.875rem 2rem;
  font-size: 0.9rem;
}
.btn-outline:hover { background: var(--surface-container-high); }

.btn-ghost {
  background: transparent;
  color: var(--primary);
  padding: 0.5rem 1rem;
  font-size: 0.875rem;
}
.btn-ghost:hover { background: rgba(173,198,255,0.08); }

.btn-lg { padding: 1.25rem 3rem; font-size: 1.1rem; border-radius: var(--radius-lg); }
.btn-sm { padding: 0.5rem 1.25rem; font-size: 0.8rem; border-radius: var(--radius-sm); }

/* ── TAG / BADGE ─────────────────────────────────────────────── */
.tag {
  display: inline-flex;
  align-items: center;
  padding: 0.3rem 0.875rem;
  border-radius: var(--radius-full);
  font-size: 0.7rem;
  font-weight: 700;
  font-family: 'Inter', sans-serif;
  letter-spacing: 0.05em;
}
.tag-primary   { background: rgba(173,198,255,0.12); color: var(--primary); }
.tag-secondary { background: var(--secondary-container); color: var(--on-secondary-container); }
.tag-surface   { background: var(--surface-container-highest); color: var(--on-surface); }
.tag-success   { background: rgba(74,222,128,0.12); color: #4ade80; }
.tag-error     { background: rgba(255,180,171,0.12); color: var(--error); }

/* ── MATERIAL ICONS ──────────────────────────────────────────── */
.material-symbols-outlined {
  font-variation-settings: 'FILL' 0, 'wght' 400, 'GRAD' 0, 'opsz' 24;
  vertical-align: middle;
  font-size: inherit;
}

/* ════════════════════════════════════════════════════════════════
   NAVIGATION
   ════════════════════════════════════════════════════════════════ */
.topnav {
  position: fixed;
  top: 0;
  width: 100%;
  z-index: 100;
  background: rgba(9,9,11,0.85);
  backdrop-filter: blur(24px);
  -webkit-backdrop-filter: blur(24px);
  border-bottom: 1px solid rgba(255,255,255,0.04);
  transition: all 0.3s;
}
.nav-inner {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 0 2rem;
  height: 5rem;
  max-width: 80rem;
  margin: 0 auto;
}
.nav-logo {
  font-size: 1.125rem;
  font-weight: 800;
  letter-spacing: -0.05em;
  color: var(--zinc-100);
  font-family: 'Lexend', sans-serif;
}
.nav-links {
  display: flex;
  gap: 2.5rem;
  align-items: center;
}
.nav-links a {
  color: var(--zinc-400);
  font-family: 'Lexend', sans-serif;
  font-weight: 500;
  font-size: 0.85rem;
  letter-spacing: -0.01em;
  transition: color 0.2s;
  position: relative;
}
.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 1.5px;
  background: var(--primary);
  transition: width 0.2s;
}
.nav-links a:hover { color: var(--zinc-100); }
.nav-links a:hover::after,
.nav-links a.active::after { width: 100%; }
.nav-links a.active { color: var(--zinc-100); }

.nav-hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: 6px;
  border-radius: 6px;
}
.nav-hamburger span {
  display: block;
  width: 22px;
  height: 2px;
  background: var(--zinc-100);
  transition: all 0.3s;
  border-radius: 2px;
}
.nav-hamburger.open span:nth-child(1) { transform: rotate(45deg) translate(5px,5px); }
.nav-hamburger.open span:nth-child(2) { opacity: 0; }
.nav-hamburger.open span:nth-child(3) { transform: rotate(-45deg) translate(5px,-5px); }

.nav-mobile {
  display: none;
  flex-direction: column;
  background: rgba(9,9,11,0.98);
  border-top: 1px solid rgba(255,255,255,0.05);
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.35s ease;
}
.nav-mobile.open { display: flex; max-height: 400px; }
.nav-mobile a {
  color: var(--zinc-400);
  font-family: 'Lexend', sans-serif;
  font-weight: 500;
  font-size: 1rem;
  padding: 1rem 2rem;
  border-bottom: 1px solid rgba(255,255,255,0.04);
  transition: color 0.2s, background 0.2s;
}
.nav-mobile a:hover { color: var(--zinc-100); background: rgba(255,255,255,0.02); }

/* ════════════════════════════════════════════════════════════════
   FOOTER
   ════════════════════════════════════════════════════════════════ */
.sitefooter {
  background: var(--zinc-950);
  padding: 3rem 2rem;
  border-top: 1px solid rgba(39,39,42,0.4);
}
.footer-inner {
  max-width: 80rem;
  margin: 0 auto;
  display: flex;
  justify-content: space-between;
  align-items: center;
  gap: 1.5rem;
  flex-wrap: wrap;
}
.footer-logo {
  font-size: 1rem;
  font-weight: 900;
  color: var(--zinc-100);
  font-family: 'Lexend', sans-serif;
  text-transform: uppercase;
  letter-spacing: -0.03em;
}
.footer-links { display: flex; gap: 2rem; }
.footer-links a {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--zinc-500);
  transition: color 0.2s;
}
.footer-links a:hover { color: #60a5fa; }
.footer-copy {
  font-size: 0.7rem;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--zinc-500);
}

/* ════════════════════════════════════════════════════════════════
   PAGE HERO (shared across pages)
   ════════════════════════════════════════════════════════════════ */
.page-hero {
  padding: 8rem 2rem 5rem;
  position: relative;
  overflow: hidden;
}
.page-hero::before {
  content: '';
  position: absolute;
  top: 0; left: 50%;
  transform: translateX(-50%);
  width: 600px; height: 400px;
  background: radial-gradient(ellipse, rgba(173,198,255,0.07) 0%, transparent 70%);
  pointer-events: none;
}
.page-hero-inner { max-width: 80rem; margin: 0 auto; }
.page-hero h1 {
  font-size: clamp(2.5rem, 6vw, 5rem);
  font-weight: 900;
  line-height: 1.05;
  letter-spacing: -0.04em;
  margin-bottom: 1.5rem;
}
.page-hero p {
  color: var(--on-surface-variant);
  font-size: 1.15rem;
  max-width: 40rem;
  line-height: 1.75;
}

/* ════════════════════════════════════════════════════════════════
   AI FLOATING WIDGET
   ════════════════════════════════════════════════════════════════ */
#ai-fab {
  position: fixed;
  bottom: 2rem;
  right: 2rem;
  z-index: 9999;
}

.ai-fab-btn {
  width: 60px;
  height: 60px;
  border-radius: 50%;
  background: var(--gradient);
  border: none;
  cursor: pointer;
  display: flex;
  align-items: center;
  justify-content: center;
  box-shadow: 0 4px 24px rgba(75,142,255,0.5), 0 0 0 0 rgba(173,198,255,0.4);
  transition: transform 0.25s, box-shadow 0.25s;
  animation: fab-pulse 3s infinite;
  position: relative;
}
.ai-fab-btn:hover {
  transform: scale(1.1);
  box-shadow: 0 6px 32px rgba(75,142,255,0.7);
  animation: none;
}
.ai-fab-btn:active { transform: scale(0.95); }

@keyframes fab-pulse {
  0%,100% { box-shadow: 0 4px 24px rgba(75,142,255,0.5), 0 0 0 0 rgba(173,198,255,0.35); }
  50%      { box-shadow: 0 4px 24px rgba(75,142,255,0.5), 0 0 0 12px rgba(173,198,255,0); }
}

.ai-fab-icon {
  width: 28px;
  height: 28px;
  fill: #002e69;
}

.ai-fab-tooltip {
  position: absolute;
  right: calc(100% + 12px);
  top: 50%;
  transform: translateY(-50%);
  background: var(--surface-container-highest);
  color: var(--on-surface);
  font-family: 'Lexend', sans-serif;
  font-size: 0.75rem;
  font-weight: 600;
  white-space: nowrap;
  padding: 0.5rem 0.875rem;
  border-radius: var(--radius-sm);
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.2s;
  border: 1px solid rgba(65,71,85,0.3);
}
.ai-fab-btn:hover .ai-fab-tooltip { opacity: 1; }

/* ── Chat Panel ──────────────────────────────────────────────── */
.ai-chat-panel {
  position: fixed;
  bottom: 5.5rem;
  right: 2rem;
  width: 380px;
  max-height: 560px;
  border-radius: var(--radius-xl);
  background: var(--surface-container-low);
  border: 1px solid rgba(65,71,85,0.25);
  box-shadow: 0 32px 80px rgba(0,0,0,0.6), 0 0 0 1px rgba(173,198,255,0.05);
  display: flex;
  flex-direction: column;
  overflow: hidden;
  z-index: 9998;
  transform: scale(0.85) translateY(20px);
  transform-origin: bottom right;
  opacity: 0;
  pointer-events: none;
  transition: transform 0.3s cubic-bezier(0.34,1.56,0.64,1), opacity 0.25s;
}
.ai-chat-panel.open {
  transform: scale(1) translateY(0);
  opacity: 1;
  pointer-events: all;
}

.ai-chat-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1.25rem 1.5rem 1rem;
  background: var(--surface-container);
  border-bottom: 1px solid rgba(65,71,85,0.2);
  flex-shrink: 0;
}
.ai-chat-header-left { display: flex; align-items: center; gap: 0.75rem; }
.ai-chat-avatar {
  width: 36px;
  height: 36px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex;
  align-items: center;
  justify-content: center;
  flex-shrink: 0;
}
.ai-chat-avatar svg { width: 18px; height: 18px; fill: #002e69; }
.ai-chat-title { font-family: 'Lexend', sans-serif; font-weight: 700; font-size: 0.9rem; }
.ai-chat-subtitle { font-size: 0.7rem; color: var(--zinc-500); display: flex; align-items: center; gap: 4px; }
.ai-online-dot {
  width: 6px; height: 6px; border-radius: 50%;
  background: #4ade80;
  animation: pulse 2s infinite;
}
@keyframes pulse { 0%,100%{opacity:1} 50%{opacity:0.4} }

.ai-chat-close {
  width: 28px; height: 28px;
  border-radius: 50%;
  background: rgba(255,255,255,0.05);
  display: flex; align-items: center; justify-content: center;
  font-size: 1rem;
  color: var(--zinc-400);
  transition: background 0.2s, color 0.2s;
}
.ai-chat-close:hover { background: rgba(255,255,255,0.1); color: var(--on-surface); }

.ai-chat-messages {
  flex: 1;
  overflow-y: auto;
  padding: 1.25rem;
  display: flex;
  flex-direction: column;
  gap: 1rem;
  scroll-behavior: smooth;
}
.ai-chat-messages::-webkit-scrollbar { width: 4px; }
.ai-chat-messages::-webkit-scrollbar-track { background: transparent; }
.ai-chat-messages::-webkit-scrollbar-thumb { background: rgba(255,255,255,0.1); border-radius: 2px; }

.chat-msg {
  display: flex;
  gap: 0.625rem;
  align-items: flex-end;
  animation: msgIn 0.25s ease;
}
@keyframes msgIn { from { opacity:0; transform:translateY(8px); } to { opacity:1; transform:none; } }

.chat-msg.user { flex-direction: row-reverse; }

.chat-msg-avatar {
  width: 26px; height: 26px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex; align-items: center; justify-content: center;
  font-size: 0.65rem;
  font-weight: 700;
  color: #002e69;
  font-family: 'Lexend', sans-serif;
  flex-shrink: 0;
}
.chat-msg.user .chat-msg-avatar {
  background: var(--surface-container-highest);
  color: var(--on-surface);
  font-size: 0.7rem;
}

.chat-bubble {
  max-width: 78%;
  padding: 0.75rem 1rem;
  border-radius: 1rem;
  font-size: 0.85rem;
  line-height: 1.55;
}
.chat-msg.ai .chat-bubble {
  background: var(--surface-container-high);
  color: var(--on-surface);
  border-bottom-left-radius: 0.25rem;
}
.chat-msg.user .chat-bubble {
  background: var(--gradient);
  color: #001a41;
  font-weight: 500;
  border-bottom-right-radius: 0.25rem;
}

.chat-typing {
  display: flex;
  gap: 4px;
  align-items: center;
  padding: 0.875rem 1rem;
}
.chat-typing span {
  width: 6px; height: 6px;
  border-radius: 50%;
  background: var(--zinc-500);
  animation: typing 1.2s infinite;
}
.chat-typing span:nth-child(2) { animation-delay: 0.2s; }
.chat-typing span:nth-child(3) { animation-delay: 0.4s; }
@keyframes typing {
  0%,60%,100% { transform: translateY(0); opacity:0.4; }
  30% { transform: translateY(-5px); opacity:1; }
}

/* Quick reply suggestions */
.ai-suggestions {
  padding: 0 1.25rem 0.75rem;
  display: flex;
  flex-wrap: wrap;
  gap: 0.5rem;
  flex-shrink: 0;
}
.ai-suggestion-btn {
  padding: 0.4rem 0.875rem;
  border-radius: var(--radius-full);
  border: 1px solid rgba(173,198,255,0.2);
  color: var(--primary);
  font-size: 0.75rem;
  font-family: 'Lexend', sans-serif;
  font-weight: 600;
  background: rgba(173,198,255,0.05);
  transition: background 0.2s, border-color 0.2s;
  cursor: pointer;
}
.ai-suggestion-btn:hover { background: rgba(173,198,255,0.12); border-color: rgba(173,198,255,0.4); }

/* Input area */
.ai-chat-input-area {
  display: flex;
  align-items: center;
  gap: 0.75rem;
  padding: 1rem 1.25rem;
  border-top: 1px solid rgba(65,71,85,0.2);
  background: var(--surface-container);
  flex-shrink: 0;
}
.ai-chat-input {
  flex: 1;
  background: var(--surface-container-highest);
  border: 1.5px solid rgba(65,71,85,0.3);
  border-radius: var(--radius-full);
  padding: 0.625rem 1rem;
  color: var(--on-surface);
  font-family: 'Inter', sans-serif;
  font-size: 0.85rem;
  outline: none;
  transition: border-color 0.2s;
}
.ai-chat-input::placeholder { color: var(--zinc-600); }
.ai-chat-input:focus { border-color: var(--primary); }

.ai-chat-send {
  width: 36px; height: 36px;
  border-radius: 50%;
  background: var(--gradient);
  display: flex; align-items: center; justify-content: center;
  color: #002e69;
  font-size: 1.1rem;
  flex-shrink: 0;
  transition: transform 0.15s, box-shadow 0.2s;
}
.ai-chat-send:hover { transform: scale(1.1); box-shadow: 0 0 16px rgba(75,142,255,0.4); }
.ai-chat-send:active { transform: scale(0.9); }
.ai-chat-send:disabled { opacity: 0.4; cursor: not-allowed; transform: none; }

/* ── RESPONSIVE ──────────────────────────────────────────────── */
@media (max-width: 768px) {
  .nav-links, .nav-actions .btn-primary { display: none; }
  .nav-hamburger { display: flex; }

  .ai-chat-panel {
    right: 1rem;
    left: 1rem;
    width: auto;
    bottom: 5rem;
  }
  #ai-fab { right: 1.25rem; bottom: 1.25rem; }

  .footer-inner { flex-direction: column; text-align: center; }
  .footer-links { flex-wrap: wrap; justify-content: center; gap: 1.25rem; }
}

@media (max-width: 480px) {
  .nav-inner { padding: 0 1.25rem; }
  .container { padding: 0 1.25rem; }
  .page-hero { padding: 7rem 1.25rem 4rem; }
}