/* 
   DOTTOR DANILO CARPENTIERI - WEBSITE DESIGN SYSTEM
   Premium Corporate CSS Stylesheet (Minimal Dark Theme, Bronze Accents)
*/

@import url('https://fonts.googleapis.com/css2?family=Outfit:wght@300;400;500;600;700&family=Inter:wght@300;400;500;600;700&family=JetBrains+Mono:wght@400;500&display=swap');

/* ==========================================================================
   CSS VARIABLES & DESIGN TOKENS
   ========================================================================== */
:root {
  /* Color Palette */
  --bg-base: #08090b;            /* Obsidian carbon background */
  --bg-panel: #0f1115;           /* Graphite dark gray */
  --bg-panel-light: #16191f;     /* Slate panel light */
  --bg-panel-glass: rgba(15, 17, 21, 0.8);
  --border-color: #1c1f26;       /* Clean dark borders */
  --border-color-light: #2c313c;
  
  --color-primary: #c4a478;      /* Muted Satin Bronze / Gold */
  --color-primary-dim: #987b55;  /* Darker Satin Bronze */
  --color-primary-glow: rgba(196, 164, 120, 0.08);
  --color-accent: #c4a478;       
  
  --text-main: #f8fafc;          /* High contrast white */
  --text-muted: #94a3b8;         /* Slate grey */
  --text-dim: #475569;           /* Slate dim */
  
  /* Typography */
  --font-display: 'Outfit', sans-serif;
  --font-body: 'Inter', sans-serif;
  --font-mono: 'JetBrains Mono', monospace;
  
  /* Layout & Spacing */
  --max-width: 1180px;           /* Cleaner, more centered container */
  --header-height: 80px;
  --radius-sm: 4px;              /* Minimalist sharp corners */
  --radius-md: 8px;
  --radius-lg: 12px;
  
  /* Transitions */
  --transition-smooth: all 0.4s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-fast: all 0.2s ease;
}

/* ==========================================================================
   BASE & RESET
   ========================================================================== */
* {
  box-sizing: border-box;
  margin: 0;
  padding: 0;
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg-base);
  color: var(--text-main);
  font-family: var(--font-body);
  font-size: 15px;               /* More compact and professional */
  line-height: 1.65;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
}

/* Scrollbar Styles */
::-webkit-scrollbar {
  width: 8px;
  height: 8px;
}
::-webkit-scrollbar-track {
  background: var(--bg-base);
}
::-webkit-scrollbar-thumb {
  background: var(--border-color);
  border-radius: 4px;
}
::-webkit-scrollbar-thumb:hover {
  background: var(--color-primary-dim);
}

a {
  color: inherit;
  text-decoration: none;
  transition: var(--transition-fast);
}

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

ul {
  list-style: none;
}

button, input, textarea, select {
  font-family: inherit;
  font-size: inherit;
  color: inherit;
  background: transparent;
  border: none;
  outline: none;
}

/* Typography elements */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  font-weight: 500;              /* Cleaner medium weight */
  line-height: 1.2;
  letter-spacing: -0.01em;
  color: var(--text-main);
}

p {
  color: var(--text-muted);
}

strong {
  color: var(--text-main);
  font-weight: 600;
}

/* Focus states */
*:focus-visible {
  outline: 1px solid var(--color-primary);
  outline-offset: 4px;
}

/* ==========================================================================
   LAYOUT UTILITIES
   ========================================================================== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 32px;
}

.grid {
  display: grid;
  gap: 32px;
}

@media (min-width: 640px) {
  .grid-2 { grid-template-columns: repeat(2, 1fr); }
}

@media (min-width: 1024px) {
  .grid-3 { grid-template-columns: repeat(3, 1fr); }
  .grid-4 { grid-template-columns: repeat(4, 1fr); }
  .grid-12 { grid-template-columns: repeat(12, 1fr); }
}

.flex { display: flex; }
.flex-col { flex-direction: column; }
.items-center { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center { justify-content: center; }

.section {
  padding: 100px 0;
}

.text-center { text-align: center; }
.mono-tag {
  font-family: var(--font-mono);
  font-size: 11px;
  font-weight: 500;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  color: var(--color-primary);
}

.section-title {
  font-size: 2rem;
  margin-top: 16px;
  margin-bottom: 24px;
  font-weight: 500;
}
@media (min-width: 768px) {
  .section-title {
    font-size: 2.6rem;
  }
}

/* Premium Minimal Separator */
.ruler {
  height: 1px;
  background: linear-gradient(90deg, transparent, var(--border-color), transparent);
  width: 100%;
}

/* ==========================================================================
   NAVIGATION BAR (GLASSMORPHIC MINIMAL)
   ========================================================================== */
#topnav {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  height: var(--header-height);
  z-index: 100;
  transition: var(--transition-smooth);
  border-bottom: 1px solid transparent;
}

#topnav.scrolled {
  background: var(--bg-panel-glass);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border-color);
  height: 70px;
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 100%;
}

.logo {
  display: flex;
  align-items: center;
  gap: 12px;
  font-family: var(--font-display);
  font-weight: 500;
  font-size: 18px;
  color: var(--text-main);
  letter-spacing: -0.01em;
}

.logo-badge {
  font-family: var(--font-display);
  font-size: 13px;
  font-weight: 600;
  color: var(--color-primary);
  border-bottom: 1.5px solid var(--color-primary);
  padding-bottom: 1px;
}

.nav-links {
  display: none;
  gap: 28px;
}
@media (min-width: 768px) {
  .nav-links {
    display: flex;
  }
}

.nav-link {
  font-size: 13.5px;
  font-weight: 400;
  color: var(--text-muted);
  position: relative;
  padding: 6px 0;
}
.nav-link:hover, .nav-link.active {
  color: var(--text-main);
}
.nav-link::after {
  content: "";
  position: absolute;
  bottom: 0;
  left: 50%;
  transform: translateX(-50%);
  width: 0;
  height: 1px;
  background-color: var(--color-primary);
  transition: var(--transition-fast);
}
.nav-link:hover::after, .nav-link.active::after {
  width: 100%;
}

.nav-cta {
  display: none;
}
@media (min-width: 768px) {
  .nav-cta {
    display: inline-flex;
  }
}

/* Mobile Hamburger Menu */
.menu-btn {
  display: flex;
  align-items: center;
  justify-content: center;
  width: 36px;
  height: 36px;
  cursor: pointer;
  transition: var(--transition-fast);
}
@media (min-width: 768px) {
  .menu-btn {
    display: none;
  }
}

/* Mobile Menu Panel */
#mobileMenu {
  position: fixed;
  top: 70px;
  left: 0;
  right: 0;
  background: var(--bg-panel);
  border-bottom: 1px solid var(--border-color);
  padding: 24px 32px;
  display: flex;
  flex-direction: column;
  gap: 18px;
  z-index: 99;
  opacity: 0;
  transform: translateY(-10px);
  pointer-events: none;
  transition: var(--transition-smooth);
}
#mobileMenu.open {
  opacity: 1;
  transform: translateY(0);
  pointer-events: auto;
}
#mobileMenu a {
  font-size: 15px;
  font-weight: 400;
  color: var(--text-muted);
  padding: 4px 0;
}
#mobileMenu a:hover, #mobileMenu a.active {
  color: var(--text-main);
}

/* ==========================================================================
   BUTTONS & ACTIONS (MINIMAL FLAT)
   ========================================================================== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  font-size: 13.5px;
  font-weight: 500;
  border-radius: var(--radius-sm);
  cursor: pointer;
  transition: var(--transition-fast);
}

.btn-primary {
  background-color: var(--color-primary);
  color: #0d0e10;
}
.btn-primary:hover {
  background-color: #dcc29b;
}

.btn-secondary {
  border: 1px solid var(--border-color);
  color: var(--text-main);
  background: transparent;
}
.btn-secondary:hover {
  border-color: var(--color-primary);
  color: var(--color-primary);
}

.btn-accent {
  background-color: var(--color-primary);
  color: #0d0e10;
}
.btn-accent:hover {
  background-color: #dcc29b;
}

.btn-icon {
  width: 36px;
  height: 36px;
  border-radius: var(--radius-sm);
  border: 1px solid var(--border-color);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--text-muted);
  transition: var(--transition-fast);
}
.btn-icon:hover {
  color: var(--color-primary);
  border-color: var(--color-primary);
}

/* ==========================================================================
   CARDS & HOVERS (CORPORATE CLEAN)
   ========================================================================== */
.card {
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 36px;
  position: relative;
  transition: var(--transition-smooth);
}

.card-glass {
  background: rgba(15, 17, 21, 0.4);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  border: 1px solid rgba(255, 255, 255, 0.03);
}

.card-hover:hover {
  border-color: var(--border-color-light);
  transform: translateY(-4px);
  box-shadow: 0 12px 30px rgba(0,0,0,0.4);
}

.card-icon {
  width: 44px;
  height: 44px;
  border-radius: var(--radius-sm);
  background: rgba(196, 164, 120, 0.05);
  border: 1px solid rgba(196, 164, 120, 0.15);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  margin-bottom: 24px;
}

.card-title {
  font-size: 18px;
  font-weight: 500;
  margin-bottom: 12px;
  color: var(--text-main);
}

/* ==========================================================================
   HERO / SPLIT HERO (CORPORATE PRESENTATION)
   ========================================================================== */
.hero-wrapper {
  position: relative;
  padding-top: calc(var(--header-height) + 60px);
  padding-bottom: 80px;
}

.hero-tagline {
  margin-bottom: 16px;
  color: var(--color-primary);
}

.hero-title {
  font-size: 2.6rem;
  line-height: 1.15;
  font-weight: 600;
  max-width: 750px;
}
@media (min-width: 768px) {
  .hero-title {
    font-size: 3.8rem;
  }
}

.hero-description {
  font-size: 17px;
  max-width: 620px;
  margin-top: 24px;
  margin-bottom: 40px;
  line-height: 1.7;
}

.hero-bivio {
  display: grid;
  gap: 32px;
  margin-top: 48px;
}
@media (min-width: 768px) {
  .hero-bivio {
    grid-template-columns: repeat(2, 1fr);
  }
}

.bivio-card {
  padding: 40px;
  border-radius: var(--radius-md);
  border: 1px solid var(--border-color);
  background: var(--bg-panel);
}

.bivio-tag {
  font-family: var(--font-mono);
  font-size: 10px;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  margin-bottom: 16px;
  display: inline-block;
  color: var(--color-primary);
}

.bivio-title {
  font-size: 22px;
  font-weight: 500;
  margin-bottom: 16px;
}

.bivio-desc {
  margin-bottom: 28px;
  font-size: 14.5px;
  line-height: 1.6;
}

.bivio-list {
  margin-bottom: 32px;
  font-size: 13.5px;
  display: flex;
  flex-direction: column;
  gap: 10px;
}
.bivio-list li {
  display: flex;
  align-items: center;
  gap: 10px;
  color: var(--text-muted);
}
.bivio-list li::before {
  content: "";
  width: 4px;
  height: 4px;
  border-radius: 50%;
  background-color: var(--color-primary);
  flex-shrink: 0;
}

/* ==========================================================================
   STATISTICS
   ========================================================================== */
.stats-bar {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
  padding: 40px 0;
}
@media (min-width: 768px) {
  .stats-bar {
    grid-template-columns: repeat(4, 1fr);
  }
}

.stat-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
}
.stat-number {
  font-family: var(--font-display);
  font-size: 32px;
  font-weight: 600;
  color: var(--text-main);
  margin-bottom: 4px;
}
.stat-label {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  color: var(--text-muted);
  letter-spacing: 0.05em;
}

/* ==========================================================================
   TIMELINE (CORPORATE HISTORY)
   ========================================================================== */
.timeline {
  position: relative;
  max-width: 750px;
  margin: 48px auto 0;
}
.timeline::before {
  content: "";
  position: absolute;
  top: 0;
  bottom: 0;
  left: 20px;
  width: 1px;
  background: var(--border-color);
}
@media (min-width: 768px) {
  .timeline::before {
    left: 50%;
    transform: translateX(-50%);
  }
}

.timeline-item {
  position: relative;
  margin-bottom: 40px;
}

.timeline-badge {
  position: absolute;
  top: 6px;
  left: 17px;
  width: 7px;
  height: 7px;
  border-radius: 50%;
  background: var(--color-primary);
  z-index: 5;
}
@media (min-width: 768px) {
  .timeline-badge {
    left: 50%;
    transform: translateX(-50%);
  }
}

.timeline-content {
  width: calc(100% - 50px);
  float: right;
  padding: 24px;
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}
@media (min-width: 768px) {
  .timeline-content {
    width: 44%;
    float: left;
  }
  .timeline-item:nth-child(even) .timeline-content {
    float: right;
  }
}

.timeline-date {
  font-family: var(--font-mono);
  font-size: 13px;
  font-weight: 500;
  color: var(--color-primary);
  margin-bottom: 6px;
  display: block;
}

.timeline-title {
  font-size: 16px;
  font-weight: 500;
  margin-bottom: 8px;
}

/* ==========================================================================
   BOOKS SHOWCASE (CLEAN 3D PERSPECTIVE)
   ========================================================================== */
.book-showcase-grid {
  display: grid;
  gap: 32px;
}
@media (min-width: 640px) {
  .book-showcase-grid {
    grid-template-columns: repeat(2, 1fr);
  }
}
@media (min-width: 1024px) {
  .book-showcase-grid {
    grid-template-columns: repeat(3, 1fr);
  }
}

.book-card {
  display: flex;
  flex-direction: column;
  cursor: pointer;
}

.book-cover-container {
  position: relative;
  perspective: 1000px;
  margin-bottom: 20px;
  aspect-ratio: 2/3;
  width: 100%;
  max-width: 220px;
  margin-left: auto;
  margin-right: auto;
}

.book-cover-img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  border-radius: var(--radius-sm);
  box-shadow: -6px 6px 18px rgba(0,0,0,0.5);
  transform-style: preserve-3d;
  transition: var(--transition-smooth);
  border: 1px solid var(--border-color);
}

.book-card:hover .book-cover-img {
  transform: rotateY(-6deg) translateY(-6px);
  box-shadow: -15px 15px 28px rgba(0,0,0,0.6);
}

.book-badge {
  position: absolute;
  top: 8px;
  right: 8px;
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  color: var(--color-primary);
  padding: 3px 8px;
  border-radius: var(--radius-sm);
  font-family: var(--font-mono);
  font-size: 9px;
  text-transform: uppercase;
}

.book-title {
  font-size: 16px;
  font-weight: 500;
  margin-bottom: 6px;
}
.book-author {
  font-size: 12.5px;
  color: var(--text-dim);
  margin-bottom: 8px;
  font-family: var(--font-mono);
}
.book-desc {
  font-size: 13.5px;
  line-height: 1.5;
}

/* ==========================================================================
   FORMS & INPUTS
   ========================================================================== */
.form-group {
  margin-bottom: 24px;
}

.form-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 11px;
  text-transform: uppercase;
  color: var(--text-muted);
  margin-bottom: 8px;
  letter-spacing: 0.05em;
}

.form-control {
  width: 100%;
  padding: 12px 16px;
  background: rgba(255, 255, 255, 0.01);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-main);
  transition: var(--transition-fast);
}
.form-control:focus {
  border-color: var(--color-primary);
  background: rgba(196, 164, 120, 0.01);
}

textarea.form-control {
  min-height: 130px;
  resize: vertical;
}

.form-select {
  appearance: none;
  background-image: url("data:image/svg+xml;charset=UTF-8,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 24 24' fill='none' stroke='%2394a3b8' stroke-width='1.5' stroke-linecap='round' stroke-linejoin='round'%3e%3cpolyline points='6 9 12 15 18 9'%3e%3c/polyline%3e%3c/svg%3e");
  background-repeat: no-repeat;
  background-position: right 16px center;
  background-size: 14px;
  padding-right: 48px;
}

/* ==========================================================================
   CONTACT DETAILS & MAP
   ========================================================================== */
.contact-info-grid {
  display: grid;
  gap: 16px;
}

.contact-item {
  display: flex;
  align-items: center;
  gap: 16px;
  padding: 20px;
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
}
.contact-item:hover {
  border-color: var(--border-color-light);
}

.contact-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-sm);
  background: var(--bg-panel-light);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--color-primary);
  flex-shrink: 0;
}

.contact-label {
  display: block;
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  color: var(--text-dim);
  letter-spacing: 0.05em;
  margin-bottom: 2px;
}
.contact-val {
  font-size: 14px;
  font-weight: 500;
  color: var(--text-main);
  word-break: break-all;
}

.map-container {
  height: 300px;
  background: var(--bg-panel);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  position: relative;
  overflow: hidden;
}

.map-placeholder {
  position: absolute;
  inset: 0;
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  padding: 30px;
  text-align: center;
  background: var(--bg-panel);
}
.map-placeholder svg {
  margin-bottom: 12px;
  color: var(--color-primary);
}

/* ==========================================================================
   FOOTER (MINIMAL CORPORATE)
   ========================================================================== */
#footer {
  border-top: 1px solid var(--border-color);
  padding: 60px 0 30px;
  background: var(--bg-base);
}

.footer-top {
  display: flex;
  flex-direction: column;
  gap: 32px;
  margin-bottom: 40px;
}
@media (min-width: 768px) {
  .footer-top {
    flex-direction: row;
    justify-content: space-between;
    align-items: flex-start;
  }
}

.footer-desc {
  max-width: 360px;
  font-size: 13.5px;
}

.footer-logo {
  font-size: 20px;
  font-weight: 500;
  margin-bottom: 12px;
}

.footer-bottom {
  display: flex;
  flex-direction: column;
  gap: 16px;
  align-items: center;
  border-top: 1px solid var(--border-color);
  padding-top: 30px;
}
@media (min-width: 768px) {
  .footer-bottom {
    flex-direction: row;
    justify-content: space-between;
  }
}

.footer-copyright {
  font-family: var(--font-mono);
  font-size: 10px;
  color: var(--text-dim);
}

/* ==========================================================================
   SCROLL REVEAL ANIMATIONS
   ========================================================================== */
.reveal {
  opacity: 0;
  transform: translateY(12px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1), transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

.reveal.in {
  opacity: 1;
  transform: translateY(0);
}

/* ==========================================================================
   IA & TRAINING ADDITIONS
   ========================================================================== */
.badge-group {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-top: 20px;
}
.badge-custom {
  font-family: var(--font-mono);
  font-size: 10px;
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 4px 10px;
  color: var(--text-muted);
  background: rgba(255,255,255,0.01);
}

.course-box {
  border-left: 2px solid var(--color-primary);
  padding-left: 20px;
  margin: 32px 0;
}

.table-glass {
  width: 100%;
  border-collapse: collapse;
  margin: 24px 0;
  font-size: 13.5px;
}
.table-glass th, .table-glass td {
  padding: 12px 16px;
  text-align: left;
  border-bottom: 1px solid var(--border-color);
}
.table-glass th {
  font-family: var(--font-mono);
  font-size: 10px;
  text-transform: uppercase;
  color: var(--color-primary);
  font-weight: 500;
}
.table-glass td {
  color: var(--text-muted);
}
.table-glass tr:hover td {
  color: var(--text-main);
}