/* === PHIERS ORIENTATION LAYER (ChatGPT) === */
.orientation-panel {
    background: #0f172a;
    color: #e5e7eb;
    padding: 14px 18px;
    border-bottom: 1px solid #1e293b;
    font-size: 0.95rem;
}
.orientation-panel strong { color:#fff; }
.orientation-panel span { display:block; margin-top:4px; color:#cbd5f5; }

.section-marker {
    font-size: 0.75rem;
    letter-spacing: 0.08em;
    text-transform: uppercase;
    color: #64748b;
    margin-bottom: 6px;
}

.orientation-panel {
    position: sticky;
    top: 0;
    z-index: 999;
}

/* === GLOBAL RESET === */
* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

/* === BODY === */
body {
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
    background: linear-gradient(135deg, #1a1a2e 0%, #16213e 50%, #0f3460 100%);
    color: #e0e0e0;
    line-height: 1.6;
    min-height: 100vh;
}

.container {
    max-width: 900px;
    margin: 0 auto;
    padding: 20px;
}

/* === HEADER === */
header {
    text-align: center;
    padding: 40px 20px;
    background: linear-gradient(135deg, rgba(15, 52, 96, 0.8), rgba(22, 33, 62, 0.8));
    border-radius: 10px;
    margin-bottom: 30px;
    border: 2px solid rgba(76, 175, 80, 0.3);
}

.logo {
    height: 140px;
    width: auto;
    margin: 20px auto;
    display: block;
}

h1 {
    font-size: 2.2em;
    margin-bottom: 10px;
    color: #4caf50;
    text-shadow: 0 0 20px rgba(76, 175, 80, 0.3);
}

.tagline {
    font-size: 1em;
    color: #81c784;
    margin-bottom: 10px;
}

.subtitle {
    font-size: 0.85em;
    color: #a5d6a7;
}

/* === NAVIGATION === */
.nav-menu {
    display: flex;
    justify-content: center;
    gap: 20px;
    flex-wrap: wrap;
    margin: 25px 0;
    padding: 20px;
    background: rgba(26, 26, 46, 0.6);
    border-radius: 10px;
    border: 2px solid rgba(76, 175, 80, 0.2);
}

.nav-item {
    cursor: pointer;
    padding: 10px 18px;
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.15), rgba(129, 199, 132, 0.15));
    border: 2px solid rgba(76, 175, 80, 0.3);
    border-radius: 8px;
    color: #4caf50;
    font-weight: bold;
    font-size: 0.9em;
    transition: all 0.3s ease;
    user-select: none;
}

/* === NAV SPACING FIX === */
.nav-menu {
    display: flex;
    flex-wrap: wrap;
    justify-content: center;
    gap: 16px; /* controls spacing between buttons */
}

.nav-item {
    margin: 4px; /* small outer margin to prevent crowding */
}


.nav-item:hover {
    background: linear-gradient(135deg, rgba(76, 175, 80, 0.4), rgba(129, 199, 132, 0.4));
    box-shadow: 0 0 15px rgba(76, 175, 80, 0.3);
}

.nav-item.active {
    background: linear-gradient(135deg, #4caf50, #45a049);
    color: white;
}

/* === SECTION LAYOUT === */
section {
    background: linear-gradient(135deg, rgba(26, 26, 46, 0.9), rgba(22, 33, 62, 0.9));
    border-left: 4px solid #4caf50;
    padding: 30px;
    margin-bottom: 30px;
    border-radius: 8px;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.4);
    display: none;
}

section.active {
    display: block;
    animation: fadeIn 0.3s ease;
}

@keyframes fadeIn {
    from { opacity: 0; }
    to { opacity: 1; }
}

h2 {
    color: #4caf50;
    margin-bottom: 20px;
    margin-top: 10px;
    font-size: 1.8em;
    font-weight: 600;
    border-bottom: 2px solid #4caf50;
    padding-bottom: 10px;
    line-height: 1.3;
}

h3 {
    color: #81c784;
    margin-top: 30px;
    margin-bottom: 15px;
    font-size: 1.3em;
    font-weight: 600;
    line-height: 1.4;
}

h4 {
    color: #4caf50;
    margin-top: 20px;
    margin-bottom: 12px;
    font-size: 1.1em;
    font-weight: 600;
    line-height: 1.4;
}

p {
    line-height: 1.7;
    margin-bottom: 15px;
}

/* === BUTTONS === */
.button-group {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
    margin: 25px 0;
    justify-content: center;
}

.btn {
    padding: 12px 25px;
    font-size: 0.95em;
    font-weight: bold;
    border: none;
    border-radius: 8px;
    cursor: pointer;
    text-decoration: none;
    display: inline-block;
    transition: all 0.3s ease;
    box-shadow: 0 4px 15px rgba(0, 0, 0, 0.3);
}

.btn-primary {
    background: linear-gradient(135deg, #4caf50, #45a049);
    color: white;
}

.btn-primary:hover {
    background: linear-gradient(135deg, #45a049, #3d8b40);
    transform: translateY(-2px);
    box-shadow: 0 6px 20px rgba(76, 175, 80, 0.4);
}

.btn-secondary {
    background: linear-gradient(135deg, #2196f3, #1976d2);
    color: white;
}

.btn-secondary:hover {
    background: linear-gradient(135deg, #1976d2, #1565c0);
    transform: translateY(-2px);
}

.btn-danger {
    background: linear-gradient(135deg, #d32f2f, #c62828);
    color: white;
}

.btn-danger:hover {
    background: linear-gradient(135deg, #c62828, #b71c1c);
    transform: translateY(-2px);
}

/* === NAV UL FIX (SPACING) === */
nav ul {
  display: flex;
  flex-wrap: wrap;
  gap: 12px;
  padding: 0;
  margin: 0;
  list-style: none;
}

nav ul li a {
  padding: 8px 14px;
  background: #f2f2f2;
  border-radius: 6px;
  text-decoration: none;
  font-weight: 600;
  color: #333;
}

nav ul li a:hover {
  background: #e0e0e0;
}

.nav-menu {
    display: flex;
    flex-wrap: wrap;
    gap: 14px;
    justify-content: center;
}

.nav-item {
    display: inline-block;
    margin: 4px;
}

footer {
    text-align: center;
    margin-top: 40px;
    padding: 20px;
    color: #a5d6a7;
    font-size: 0.9em;
}

footer a {
    color: #4caf50;
    text-decoration: none;
    font-weight: bold;
}

footer a:hover {
    text-decoration: underline;
}

.page-title {
    text-align: center;
    font-size: 2.2rem;
    font-weight: 700;
    color: #4caf50;
    margin-top: 30px;
    margin-bottom: 20px;
    text-shadow: 0 0 12px rgba(76, 175, 80, 0.25);
}