/* ============================================================
   FITNESSIFY AI — GLOBAL DESIGN SYSTEM
   Premium wellness platform styles
   ============================================================ */

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

/* ---- CSS VARIABLES (Light Mode) ---- */
:root {
  --primary: #6C63FF;
  --primary-dark: #5A52E0;
  --primary-light: #8B80FF;
  --primary-glow: rgba(108, 99, 255, 0.25);
  --primary-subtle: rgba(108, 99, 255, 0.08);

  --accent: #00D9A7;
  --accent-dark: #00B589;
  --accent-light: #33E5BE;
  --accent-glow: rgba(0, 217, 167, 0.25);
  --accent-subtle: rgba(0, 217, 167, 0.08);

  --gradient: linear-gradient(135deg, #6C63FF 0%, #00D9A7 100%);
  --gradient-text: linear-gradient(135deg, #8B80FF 0%, #00D9A7 100%);
  --gradient-hover: linear-gradient(135deg, #8B80FF 0%, #33E5BE 100%);

  --success: #10B981;
  --warning: #F59E0B;
  --error: #EF4444;
  --info: #3B82F6;

  /* Light Mode Surfaces */
  --bg:          #F0F2FF;
  --bg-surface:  #FFFFFF;
  --bg-card:     #FFFFFF;
  --bg-input:    #F5F6FF;
  --bg-nav:      rgba(255,255,255,0.88);

  --text-primary:   #1A1A2E;
  --text-secondary: #4B5563;
  --text-muted:     #9CA3AF;

  --border:       rgba(108, 99, 255, 0.18);
  --border-solid: #E5E7EB;

  --shadow-sm: 0 2px 8px rgba(108,99,255,0.08);
  --shadow:    0 4px 24px rgba(108,99,255,0.12);
  --shadow-lg: 0 8px 48px rgba(108,99,255,0.2);

  /* Typography */
  --font-sans:    'Inter', system-ui, sans-serif;
  --font-display: 'Space Grotesk', system-ui, sans-serif;

  /* Radii */
  --radius-sm: 8px;
  --radius:    14px;
  --radius-lg: 20px;
  --radius-xl: 28px;
  --radius-full: 9999px;

  /* Transitions */
  --ease: cubic-bezier(0.4, 0, 0.2, 1);
  --ease-bounce: cubic-bezier(0.34, 1.56, 0.64, 1);
  --transition:      all 0.25s var(--ease);
  --transition-slow: all 0.4s var(--ease);
}

/* ---- DARK MODE OVERRIDES ---- */
[data-theme="dark"] {
  --bg:         #080A18;
  --bg-surface: #0F1226;
  --bg-card:    #161930;
  --bg-input:   #0B0D1E;
  --bg-nav:     rgba(15,18,38,0.92);

  --text-primary:   #EEEEF7;
  --text-secondary: #9CA3AF;
  --text-muted:     #6B7280;

  --border:       rgba(108, 99, 255, 0.22);
  --border-solid: #252845;

  --shadow-sm: 0 2px 8px rgba(0,0,0,0.35);
  --shadow:    0 4px 24px rgba(0,0,0,0.5);
  --shadow-lg: 0 8px 48px rgba(0,0,0,0.65);
}

/* ---- RESET ---- */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }
html { scroll-behavior: smooth; font-size: 16px; }
body {
  font-family: var(--font-sans);
  background: var(--bg);
  color: var(--text-primary);
  line-height: 1.65;
  min-height: 100vh;
  transition: background 0.35s var(--ease), color 0.35s var(--ease);
  -webkit-font-smoothing: antialiased;
}
img, video { display: block; max-width: 100%; }
button { cursor: pointer; font-family: inherit; }
a { text-decoration: none; color: inherit; }
ul, ol { list-style: none; }
input, textarea, select { font-family: inherit; }

/* ---- TYPOGRAPHY ---- */
.font-display { font-family: var(--font-display); }

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

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

/* ---- BUTTONS ---- */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 24px;
  border: none;
  border-radius: var(--radius-full);
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  font-weight: 600;
  cursor: pointer;
  transition: var(--transition);
  white-space: nowrap;
  position: relative;
  overflow: hidden;
  letter-spacing: -0.01em;
}
.btn::after {
  content: '';
  position: absolute;
  inset: 0;
  background: rgba(255,255,255,0);
  transition: var(--transition);
}
.btn:hover::after { background: rgba(255,255,255,0.07); }
.btn:active { transform: scale(0.97); }

.btn-primary {
  background: var(--gradient);
  color: #fff;
  box-shadow: 0 4px 20px var(--primary-glow);
}
.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 32px rgba(108,99,255,0.4);
}

.btn-secondary {
  background: var(--bg-card);
  color: var(--text-primary);
  border: 1.5px solid var(--border-solid);
}
.btn-secondary:hover {
  border-color: var(--primary);
  color: var(--primary);
  background: var(--primary-subtle);
}

.btn-ghost {
  background: transparent;
  color: var(--text-secondary);
  padding: 10px 18px;
}
.btn-ghost:hover { color: var(--primary); background: var(--primary-subtle); }

.btn-outline {
  background: transparent;
  border: 1.5px solid var(--primary);
  color: var(--primary);
}
.btn-outline:hover { background: var(--primary); color: #fff; }

.btn-accent {
  background: linear-gradient(135deg, #00D9A7, #6C63FF);
  color: #fff;
  box-shadow: 0 4px 20px var(--accent-glow);
}
.btn-accent:hover { transform: translateY(-2px); box-shadow: 0 8px 32px var(--accent-glow); }

.btn-danger { background: #EF4444; color: #fff; }
.btn-danger:hover { background: #DC2626; }

.btn-lg { padding: 16px 36px; font-size: 1.0625rem; }
.btn-sm { padding: 8px 16px; font-size: 0.8125rem; }
.btn-xs { padding: 6px 12px; font-size: 0.75rem; }

.btn-icon {
  padding: 10px;
  border-radius: var(--radius);
  width: 42px;
  height: 42px;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  transform: none !important;
}

.btn-loading {
  pointer-events: none;
  opacity: 0.8;
}
.btn-loading::before {
  content: '';
  width: 16px;
  height: 16px;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.6s linear infinite;
  display: inline-block;
}

/* ---- CARDS ---- */
.card {
  background: var(--bg-card);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 24px;
  box-shadow: var(--shadow-sm);
  transition: var(--transition);
}
.card:hover { box-shadow: var(--shadow); transform: translateY(-2px); }

.card-glass {
  background: rgba(255,255,255,0.06);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border: 1px solid rgba(255,255,255,0.12);
}

/* ---- INPUTS ---- */
.input-group {
  display: flex;
  flex-direction: column;
  gap: 6px;
  margin-bottom: 18px;
}
.input-label {
  font-size: 0.8125rem;
  font-weight: 600;
  color: var(--text-secondary);
  letter-spacing: 0.02em;
  text-transform: uppercase;
}
.input {
  background: var(--bg-input);
  border: 1.5px solid var(--border-solid);
  border-radius: var(--radius);
  padding: 13px 16px;
  font-family: var(--font-sans);
  font-size: 0.9375rem;
  color: var(--text-primary);
  width: 100%;
  transition: var(--transition);
  outline: none;
  appearance: none;
}
.input:focus {
  border-color: var(--primary);
  box-shadow: 0 0 0 3px var(--primary-glow);
  background: var(--bg-surface);
}
.input::placeholder { color: var(--text-muted); }
.input:hover { border-color: var(--primary-light); }

textarea.input {
  resize: vertical;
  min-height: 100px;
  line-height: 1.6;
}

.input-icon-wrap {
  position: relative;
}
.input-icon-wrap .input { padding-left: 44px; }
.input-icon-wrap .icon {
  position: absolute;
  left: 14px;
  top: 50%;
  transform: translateY(-50%);
  color: var(--text-muted);
  pointer-events: none;
}

/* ---- MODALS ---- */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.55);
  backdrop-filter: blur(10px);
  -webkit-backdrop-filter: blur(10px);
  z-index: 1000;
  display: flex;
  align-items: center;
  justify-content: center;
  padding: 20px;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.3s var(--ease);
}
.modal-overlay.active {
  opacity: 1;
  pointer-events: all;
}
.modal {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 40px;
  width: 100%;
  max-width: 480px;
  box-shadow: var(--shadow-lg);
  transform: scale(0.93) translateY(24px);
  transition: transform 0.4s var(--ease-bounce), opacity 0.3s var(--ease);
}
.modal-overlay.active .modal {
  transform: scale(1) translateY(0);
}

/* ---- BADGE ---- */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  padding: 6px 14px;
  border-radius: var(--radius-full);
  font-size: 0.8125rem;
  font-weight: 600;
  background: var(--primary-subtle);
  color: var(--primary);
  border: 1px solid var(--border);
}
.badge-accent { background: var(--accent-subtle); color: var(--accent-dark); }
.badge-success { background: rgba(16,185,129,0.1); color: var(--success); }
.badge-warning { background: rgba(245,158,11,0.1); color: var(--warning); }
.badge-error   { background: rgba(239,68,68,0.1);  color: var(--error); }

/* ---- DIVIDER ---- */
.divider {
  display: flex;
  align-items: center;
  gap: 12px;
  color: var(--text-muted);
  font-size: 0.8125rem;
  margin: 20px 0;
}
.divider::before, .divider::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border-solid);
}

/* ---- PROGRESS BAR ---- */
.progress-track {
  height: 6px;
  background: var(--border-solid);
  border-radius: var(--radius-full);
  overflow: hidden;
}
.progress-fill {
  height: 100%;
  background: var(--gradient);
  border-radius: var(--radius-full);
  transition: width 0.5s var(--ease-bounce);
}

/* ---- TOAST NOTIFICATIONS ---- */
#toast-container {
  position: fixed;
  bottom: 24px;
  right: 24px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  pointer-events: none;
}
.toast {
  background: var(--bg-surface);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 14px 18px;
  box-shadow: var(--shadow-lg);
  font-size: 0.875rem;
  display: flex;
  align-items: center;
  gap: 10px;
  animation: slideInRight 0.4s var(--ease-bounce);
  max-width: 340px;
  pointer-events: all;
  color: var(--text-primary);
  font-weight: 500;
}
.toast.success { border-left: 3px solid var(--accent); }
.toast.error   { border-left: 3px solid var(--error); }
.toast.info    { border-left: 3px solid var(--primary); }
.toast.warning { border-left: 3px solid var(--warning); }
.toast-icon { font-size: 1.1rem; flex-shrink: 0; }
.toast-out { animation: slideOutRight 0.3s var(--ease) forwards; }

/* ---- SCROLLBAR ---- */
::-webkit-scrollbar { width: 5px; height: 5px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--border-solid); border-radius: var(--radius-full); }
::-webkit-scrollbar-thumb:hover { background: var(--primary); }

/* ---- ANIMATIONS ---- */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(28px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}
@keyframes fadeDown {
  from { opacity: 0; transform: translateY(-20px); }
  to   { opacity: 1; transform: translateY(0); }
}
@keyframes fadeLeft {
  from { opacity: 0; transform: translateX(20px); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes float {
  0%, 100% { transform: translateY(0px); }
  50%       { transform: translateY(-12px); }
}
@keyframes float2 {
  0%, 100% { transform: translateY(0px) rotate(0deg); }
  50%       { transform: translateY(-8px) rotate(3deg); }
}
@keyframes spin {
  to { transform: rotate(360deg); }
}
@keyframes shimmer {
  0%   { background-position: -200% center; }
  100% { background-position: 200% center; }
}
@keyframes slideInRight {
  from { opacity: 0; transform: translateX(40px); }
  to   { opacity: 1; transform: translateX(0); }
}
@keyframes slideOutRight {
  from { opacity: 1; transform: translateX(0); }
  to   { opacity: 0; transform: translateX(40px); }
}
@keyframes pulse {
  0%, 100% { transform: scale(1); opacity: 1; }
  50%       { transform: scale(1.05); opacity: 0.8; }
}
@keyframes orbFloat {
  0%, 100% { transform: translate(0, 0) scale(1); }
  33%       { transform: translate(30px, -40px) scale(1.05); }
  66%       { transform: translate(-20px, 20px) scale(0.95); }
}
@keyframes typing {
  0%, 80%, 100% { transform: scale(0.6); opacity: 0.4; }
  40%            { transform: scale(1);   opacity: 1; }
}

/* Animation utilities */
.animate-fade-up  { animation: fadeUp  0.65s var(--ease) both; }
.animate-fade-in  { animation: fadeIn  0.4s  var(--ease) both; }
.animate-fade-down{ animation: fadeDown 0.4s  var(--ease) both; }
.animate-fade-left{ animation: fadeLeft 0.4s  var(--ease) both; }
.animate-float    { animation: float   5s    ease-in-out infinite; }
.animate-float-2  { animation: float2  7s    ease-in-out infinite; }

.delay-100 { animation-delay: 0.1s; }
.delay-200 { animation-delay: 0.2s; }
.delay-300 { animation-delay: 0.3s; }
.delay-400 { animation-delay: 0.4s; }
.delay-500 { animation-delay: 0.5s; }
.delay-600 { animation-delay: 0.6s; }

/* ---- SKELETON LOADING ---- */
.skeleton {
  background: linear-gradient(90deg, var(--border-solid) 25%, var(--bg) 50%, var(--border-solid) 75%);
  background-size: 400% 100%;
  animation: shimmer 1.8s ease-in-out infinite;
  border-radius: var(--radius-sm);
  color: transparent !important;
}

/* ---- RESPONSIVE CONTAINER ---- */
.container {
  width: 100%;
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ---- UTILITY ---- */
.sr-only        { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }
.text-center    { text-align: center; }
.text-right     { text-align: right; }
.text-sm        { font-size: 0.875rem; }
.text-xs        { font-size: 0.75rem; }
.text-lg        { font-size: 1.125rem; }
.text-xl        { font-size: 1.25rem; }
.text-muted     { color: var(--text-muted); }
.text-secondary { color: var(--text-secondary); }
.text-primary-c { color: var(--primary); }
.text-accent    { color: var(--accent); }
.text-success   { color: var(--success); }
.text-error     { color: var(--error); }
.font-bold      { font-weight: 700; }
.font-semibold  { font-weight: 600; }
.font-medium    { font-weight: 500; }

.flex           { display: flex; }
.flex-col       { display: flex; flex-direction: column; }
.items-center   { align-items: center; }
.items-start    { align-items: flex-start; }
.justify-center { justify-content: center; }
.justify-between{ justify-content: space-between; }
.justify-end    { justify-content: flex-end; }
.flex-wrap      { flex-wrap: wrap; }
.flex-1         { flex: 1; }
.gap-1          { gap: 4px; }
.gap-2          { gap: 8px; }
.gap-3          { gap: 12px; }
.gap-4          { gap: 16px; }
.gap-6          { gap: 24px; }
.gap-8          { gap: 32px; }

.w-full         { width: 100%; }
.h-full         { height: 100%; }
.min-h-screen   { min-height: 100vh; }

.mt-1 { margin-top: 4px; }
.mt-2 { margin-top: 8px; }
.mt-4 { margin-top: 16px; }
.mt-6 { margin-top: 24px; }
.mt-8 { margin-top: 32px; }
.mb-2 { margin-bottom: 8px; }
.mb-4 { margin-bottom: 16px; }
.mb-6 { margin-bottom: 24px; }
.ml-auto { margin-left: auto; }

.p-4  { padding: 16px; }
.p-6  { padding: 24px; }
.pt-4 { padding-top: 16px; }
.pb-4 { padding-bottom: 16px; }

.hidden          { display: none !important; }
.invisible       { visibility: hidden; }
.opacity-0       { opacity: 0; }
.overflow-hidden { overflow: hidden; }
.relative        { position: relative; }
.absolute        { position: absolute; }
.fixed           { position: fixed; }

.rounded    { border-radius: var(--radius); }
.rounded-lg { border-radius: var(--radius-lg); }
.rounded-xl { border-radius: var(--radius-xl); }
.rounded-full { border-radius: var(--radius-full); }

.truncate { overflow: hidden; text-overflow: ellipsis; white-space: nowrap; }
.pointer  { cursor: pointer; }
.no-select{ user-select: none; }

/* Grid helper */
.grid-2 { display: grid; grid-template-columns: repeat(2, 1fr); gap: 20px; }
.grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 20px; }

@media (max-width: 768px) {
  .grid-2, .grid-3 { grid-template-columns: 1fr; }
  .hide-mobile { display: none !important; }
}
@media (max-width: 480px) {
  .container { padding: 0 16px; }
}