/* ============================================
   GLOBAL CSS — Friends Management Design System
   ============================================ */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;400;500;600;700;800;900&family=Poppins:wght@400;600;700;800;900&display=swap');

:root {
  /* Colors */
  --bg: #050c10;
  --bg-secondary: #07121a;
  --surface: rgba(255, 255, 255, 0.04);
  --surface-hover: rgba(255, 255, 255, 0.07);
  --border: rgba(255, 255, 255, 0.08);
  --border-glow: rgba(6, 182, 212, 0.3);

  /* Accents */
  --purple: #06b6d4;
  --blue: #0ea5e9;
  --pink: #0891b2;
  --cyan: #06b6d4;
  --green: #10b981;

  /* Gradients */
  --gradient: linear-gradient(135deg, #06b6d4, #0891b2);
  --gradient-blue: linear-gradient(135deg, #0ea5e9, #06b6d4);
  --gradient-glow: linear-gradient(135deg, rgba(6,182,212,0.3), rgba(8,145,178,0.3));

  /* Text */
  --text-primary: #e2f8fc;
  --text-secondary: #94a3b8;
  --text-muted: #475569;

  /* Typography */
  --font-body: 'Inter', sans-serif;
  --font-display: 'Poppins', sans-serif;

  /* Spacing */
  --radius-sm: 8px;
  --radius: 16px;
  --radius-lg: 24px;
  --radius-xl: 32px;

  /* Shadows */
  --shadow-glow: 0 0 30px rgba(6, 182, 212, 0.2);
  --shadow-card: 0 8px 32px rgba(0, 0, 0, 0.4);
  --shadow-button: 0 4px 20px rgba(6, 182, 212, 0.4);
}

/* ============ RESET ============ */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-font-smoothing: antialiased;
}

html {
  scroll-behavior: smooth;
}

body {
  background-color: var(--bg);
  color: var(--text-primary);
  font-family: var(--font-body);
  font-size: 17px; /* Increased for bolder look */
  line-height: 1.6;
  overflow-x: hidden;
}

a {
  color: inherit;
  text-decoration: none;
}

button {
  cursor: pointer;
  font-family: var(--font-body);
  border: none;
  outline: none;
}

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

/* ============ SCROLLBAR ============ */
::-webkit-scrollbar {
  width: 6px;
}
::-webkit-scrollbar-track {
  background: var(--bg);
}
::-webkit-scrollbar-thumb {
  background: var(--cyan);
  border-radius: 3px;
}

/* ============ TYPOGRAPHY ============ */
h1, h2, h3, h4, h5, h6 {
  font-family: var(--font-display);
  line-height: 1.2;
  font-weight: 700;
  color: var(--text-primary);
}

.gradient-text {
  background: var(--gradient);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ============ BUTTONS ============ */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 15px 32px; /* Large, bold buttons */
  border-radius: 50px;
  font-weight: 700; /* Bolder font */
  font-size: 1rem;
  letter-spacing: 0.5px;
  transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
  cursor: pointer;
  border: none;
  position: relative;
  overflow: hidden;
}

.btn::before {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0.1);
  opacity: 0;
  transition: opacity 0.3s;
}

.btn:hover::before {
  opacity: 1;
}

.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: var(--shadow-button);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(6, 182, 212, 0.6);
}

.btn-outline {
  background: transparent;
  color: var(--text-primary);
  border: 1.5px solid var(--border);
  backdrop-filter: blur(8px);
}

.btn-outline:hover {
  border-color: var(--cyan);
  transform: translateY(-2px);
  box-shadow: 0 0 15px rgba(6, 182, 212, 0.2);
}

.btn-ghost {
  background: var(--surface);
  color: var(--text-primary);
  backdrop-filter: blur(8px);
}

.btn-ghost:hover {
  background: var(--surface-hover);
  transform: translateY(-2px);
}

.btn-success {
  background: linear-gradient(135deg, #10b981, #06b6d4);
  color: #fff;
  box-shadow: 0 4px 20px rgba(16, 185, 129, 0.4);
}

.btn-success:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(16, 185, 129, 0.5);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.85rem;
}

.btn-lg {
  padding: 18px 40px;
  font-size: 1.05rem;
}

.btn-full {
  width: 100%;
}

.btn-icon {
  padding: 12px;
  width: 44px;
  height: 44px;
  border-radius: 50%;
}

/* ============ GLASS CARD ============ */
.glass-card {
  background: var(--surface);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  transition: all 0.3s ease;
}

.glass-card:hover {
  border-color: var(--border-glow);
  box-shadow: var(--shadow-glow), var(--shadow-card);
  transform: translateY(-4px);
}

/* ============ BADGE ============ */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 4px 12px;
  border-radius: 50px;
  font-size: 0.75rem;
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.badge-purple {
  background: rgba(6, 182, 212, 0.15);
  color: var(--cyan);
  border: 1px solid rgba(6, 182, 212, 0.3);
}

.badge-green {
  background: rgba(16, 185, 129, 0.15);
  color: var(--green);
  border: 1px solid rgba(16, 185, 129, 0.3);
}

.badge-pink {
  background: rgba(8, 145, 178, 0.15);
  color: var(--pink);
  border: 1px solid rgba(8, 145, 178, 0.3);
}

.badge-blue {
  background: rgba(59, 130, 246, 0.15);
  color: var(--blue);
  border: 1px solid rgba(59, 130, 246, 0.3);
}

.badge-yellow {
  background: rgba(245, 158, 11, 0.15);
  color: #f59e0b;
  border: 1px solid rgba(245, 158, 11, 0.3);
}

/* ============ FORM ELEMENTS ============ */
.form-group {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.form-label {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--text-secondary);
}

.form-input {
  background: rgba(255, 255, 255, 0.05);
  border: 1px solid var(--border);
  border-radius: var(--radius-sm);
  padding: 14px 16px;
  color: var(--text-primary);
  font-size: 0.95rem;
  font-family: var(--font-body);
  width: 100%;
  transition: all 0.2s ease;
}

.form-input:focus {
  outline: none;
  border-color: var(--cyan);
  box-shadow: 0 0 0 3px rgba(6, 182, 212, 0.15);
  background: rgba(255, 255, 255, 0.07);
}

.form-input::placeholder {
  color: var(--text-muted);
}

select.form-input option {
  background: #1e293b;
  color: var(--text-primary);
}

textarea.form-input {
  resize: vertical;
  min-height: 100px;
}

/* Range Slider */
.range-slider {
  -webkit-appearance: none;
  width: 100%;
  height: 6px;
  border-radius: 3px;
  background: var(--border);
  outline: none;
  cursor: pointer;
}
.range-slider::-webkit-slider-thumb {
  -webkit-appearance: none;
  width: 22px;
  height: 22px;
  border-radius: 50%;
  background: var(--gradient);
  cursor: pointer;
  box-shadow: 0 0 10px rgba(6,182,212,0.5);
  border: 2px solid rgba(255,255,255,0.3);
}

/* ============ LAYOUT ============ */
.container {
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.section {
  padding: 120px 0; /* Generous spacing for a premium feel */
}

.section-sm {
  padding: 80px 0;
}

.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-header h2 {
  font-size: clamp(2rem, 4vw, 3rem);
  margin-bottom: 16px;
}

.section-header p {
  font-size: 1.1rem;
  color: var(--text-secondary);
  max-width: 560px;
  margin: 0 auto;
}

.grid-3 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(320px, 1fr));
  gap: 24px;
}

.grid-2 {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(420px, 1fr));
  gap: 32px;
}

.flex-center {
  display: flex;
  align-items: center;
  justify-content: center;
}

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

/* ============ DIVIDER ============ */
.divider {
  height: 1px;
  background: var(--border);
  margin: 40px 0;
}

/* ============ LOADING SKELETON ============ */
.skeleton {
  background: linear-gradient(90deg, rgba(255,255,255,0.04) 25%, rgba(255,255,255,0.08) 50%, rgba(255,255,255,0.04) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.5s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

@keyframes shimmer {
  0% { background-position: 200% 0; }
  100% { background-position: -200% 0; }
}

/* ============ ANIMATIONS ============ */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(30px); }
  to { opacity: 1; transform: translateY(0); }
}

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

@keyframes float {
  0%, 100% { transform: translateY(0); }
  50% { transform: translateY(-10px); }
}

@keyframes glow-pulse {
  0%, 100% { box-shadow: 0 0 20px rgba(6,182,212,0.3); }
  50% { box-shadow: 0 0 40px rgba(6,182,212,0.6); }
}

@keyframes spin {
  to { transform: rotate(360deg); }
}

@keyframes checkmark {
  from { stroke-dashoffset: 100; }
  to { stroke-dashoffset: 0; }
}

@keyframes scale-in {
  from { opacity: 0; transform: scale(0.9); }
  to { opacity: 1; transform: scale(1); }
}

.animate-fade-up {
  animation: fadeUp 0.6s cubic-bezier(0.16, 1, 0.3, 1) forwards;
}

.animate-float {
  animation: float 3s ease-in-out infinite;
}

/* ============ NOISE OVERLAY ============ */
body::before {
  content: '';
  position: fixed;
  inset: 0;
  background-image: url("data:image/svg+xml,%3Csvg viewBox='0 0 256 256' xmlns='http://www.w3.org/2000/svg'%3E%3Cfilter id='noise'%3E%3CfeTurbulence type='fractalNoise' baseFrequency='0.9' numOctaves='4' stitchTiles='stitch'/%3E%3C/filter%3E%3Crect width='100%25' height='100%25' filter='url(%23noise)' opacity='0.03'/%3E%3C/svg%3E");
  background-size: 150px;
  pointer-events: none;
  z-index: 9999;
  opacity: 0.4;
}

/* ============ RESPONSIVE ============ */
@media (max-width: 768px) {
  .section { padding: 60px 0; }
  .section-header { margin-bottom: 40px; }
  .grid-3 { grid-template-columns: 1fr; }
  .grid-2 { grid-template-columns: 1fr; }
  .container { padding: 0 24px; }
  .btn-lg { padding: 18px 36px; font-size: 1.1rem; }
}

@media (max-width: 480px) {
  .section { padding: 50px 0; }
  body { font-size: 16px; }
}