/* =========================================================
   I-Chat — Global Styles & Design Tokens
   Based on Figma Marketing Design System
   ========================================================= */

@import url('https://fonts.googleapis.com/css2?family=Inter:wght@300;320;330;340;400;450;480;540;700&family=JetBrains+Mono:wght@400;500&display=swap');

:root {
  /* ---- Brand & Accent (Monochrome Core) ---- */
  --primary: #000000;
  --on-primary: #FFFFFF;
  --accent-magenta: #E91E8C;

  /* ---- Surface ---- */
  --canvas: #FFFFFF;
  --inverse-canvas: #000000;
  --surface-soft: #F5F5F5;
  --hairline: rgba(0, 0, 0, 0.10);
  --hairline-soft: rgba(0, 0, 0, 0.06);

  /* ---- Color Blocks (Signature) ---- */
  --block-lime: #D4EDAA;
  --block-lilac: #E8E0F0;
  --block-cream: #FDF6E3;
  --block-mint: #D1F4E0;
  --block-pink: #FDE8EF;
  --block-coral: #FFD4CC;
  --block-navy: #1E2A4A;

  /* ---- Text ---- */
  --ink: #000000;
  --inverse-ink: #FFFFFF;
  --on-inverse-soft: rgba(255, 255, 255, 0.16);

  /* ---- Semantic ---- */
  --success: #24B461;
  --danger: #DC3545;
  --warning: #D97C09;
  --overlay-scrim: rgba(0, 0, 0, 0.60);

  /* ---- Typography ---- */
  --font-sans: 'Inter', -apple-system, BlinkMacSystemFont, 'SF Pro Display', system-ui, sans-serif;
  --font-mono: 'JetBrains Mono', 'SF Mono', 'Menlo', monospace;

  /* ---- Spacing (8px base unit) ---- */
  --spacing-hair: 1px;
  --spacing-xxs: 4px;
  --spacing-xs: 8px;
  --spacing-sm: 12px;
  --spacing-md: 16px;
  --spacing-lg: 24px;
  --spacing-xl: 32px;
  --spacing-xxl: 48px;
  --spacing-section: 96px;

  /* ---- Border Radius ---- */
  --rounded-xs: 2px;
  --rounded-sm: 6px;
  --rounded-md: 8px;
  --rounded-lg: 24px;
  --rounded-xl: 32px;
  --rounded-pill: 50px;
  --rounded-full: 9999px;

  /* ---- Elevation ---- */
  --shadow-soft: 0 4px 16px rgba(0, 0, 0, 0.06);
  --shadow-lift: 0 8px 32px rgba(0, 0, 0, 0.08);
  --shadow-modal: 0 16px 48px rgba(0, 0, 0, 0.12);

  /* ---- Transitions ---- */
  --ease: cubic-bezier(0.22, 1, 0.36, 1);
}

/* ---- Dark Theme Override ---- */
[data-theme="dark"] {
  --canvas: #0B0B0B;
  --inverse-canvas: #FFFFFF;
  --surface-soft: #1A1A1A;
  --hairline: rgba(255, 255, 255, 0.12);
  --hairline-soft: rgba(255, 255, 255, 0.06);

  --block-lime: #3D4A2F;
  --block-lilac: #3A3450;
  --block-cream: #2E2C26;
  --block-mint: #2A3E32;
  --block-pink: #3E2A34;
  --block-coral: #3E2E2A;
  --block-navy: #0D1424;

  --ink: #FFFFFF;
  --inverse-ink: #000000;

  --shadow-soft: 0 4px 16px rgba(0, 0, 0, 0.24);
  --shadow-lift: 0 8px 32px rgba(0, 0, 0, 0.32);
  --shadow-modal: 0 16px 48px rgba(0, 0, 0, 0.40);
}

/* ---- Reset ---- */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html {
  scroll-behavior: smooth;
  overflow-x: hidden;
  -webkit-text-size-adjust: 100%;
}

@media (prefers-reduced-motion: reduce) {
  html { scroll-behavior: auto; }
  *, *::before, *::after {
    animation-duration: 0.01ms !important;
    transition-duration: 0.01ms !important;
  }
}

/* ---- Base ---- */
body {
  font-family: var(--font-sans);
  background: var(--canvas);
  color: var(--ink);
  min-height: 100vh;
  font-weight: 320;
  font-size: 18px;
  line-height: 1.45;
  letter-spacing: -0.26px;
  transition: background 0.3s var(--ease), color 0.3s var(--ease);
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
  font-feature-settings: 'kern' 1, 'liga' 1;
}

.auth-brand-top {
    display: flex;
    align-items: center;
    gap: 12px;
}

.brand-logo {
    display: flex;
    align-items: center;
    gap: 10px;
    font-size: 2rem;
    font-weight: 700;
    color: #fff;
}

.logo-mark{
    width:48px;
    height:48px;
    background:#ffffff;
    border-radius:12px;
    display:flex;
    align-items:center;
    justify-content:center;
    padding:6px;
}

.logo-mark img{
    width:40px;
    height:40px;
    filter: drop-shadow(0 0 6px rgba(255,255,255,.8));
}

/* ---- Typography Hierarchy ---- */
h1, h2, h3, h4 {
  font-family: var(--font-sans);
  font-weight: 340;
  color: var(--ink);
  font-feature-settings: 'kern' 1;
}

.display-xl {
  font-size: 86px;
  font-weight: 340;
  line-height: 1.00;
  letter-spacing: -1.72px;
}

.display-lg {
  font-size: 64px;
  font-weight: 340;
  line-height: 1.10;
  letter-spacing: -0.96px;
}

.headline {
  font-size: 26px;
  font-weight: 540;
  line-height: 1.35;
  letter-spacing: -0.26px;
}

.subhead {
  font-size: 26px;
  font-weight: 340;
  line-height: 1.35;
  letter-spacing: -0.26px;
}

.body-lg {
  font-size: 20px;
  font-weight: 330;
  line-height: 1.40;
  letter-spacing: -0.14px;
}

.body {
  font-size: 18px;
  font-weight: 320;
  line-height: 1.45;
  letter-spacing: -0.26px;
}

.body-sm {
  font-size: 16px;
  font-weight: 330;
  line-height: 1.45;
  letter-spacing: -0.14px;
}

.card-title {
  font-size: 24px;
  font-weight: 700;
  line-height: 1.45;
  letter-spacing: 0;
}

/* ---- Mono (Taxonomy only) ---- */
.eyebrow {
  font-family: var(--font-mono);
  font-size: 18px;
  font-weight: 400;
  line-height: 1.30;
  letter-spacing: 0.54px;
  text-transform: uppercase;
}

.caption {
  font-family: var(--font-mono);
  font-size: 12px;
  font-weight: 400;
  line-height: 1.00;
  letter-spacing: 0.60px;
  text-transform: uppercase;
}

/* ---- Links ---- */
a {
  color: inherit;
  text-decoration: none;
}

.link {
  font-size: 20px;
  font-weight: 480;
  line-height: 1.40;
  letter-spacing: -0.10px;
  color: var(--ink);
  transition: opacity 0.15s var(--ease);
}

.link:hover {
  opacity: 0.7;
}

/* ---- Buttons (Pill Only) ---- */
button {
  font-family: inherit;
  cursor: pointer;
  border: none;
  background: none;
  color: inherit;
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 10px 20px;
  border-radius: var(--rounded-pill);
  font-size: 20px;
  font-weight: 480;
  line-height: 1.40;
  letter-spacing: -0.10px;
  transition: transform 0.15s var(--ease), background 0.2s var(--ease);
  white-space: nowrap;
  border: none;
  cursor: pointer;
}

.btn:active {
  transform: scale(0.97);
}

.btn-primary {
  background: var(--primary);
  color: var(--on-primary);
}

.btn-primary:hover {
  opacity: 0.9;
}

.btn-secondary {
  background: var(--canvas);
  color: var(--ink);
  border: none;
  padding: 8px 18px 10px;
}

.btn-secondary:hover {
  background: var(--surface-soft);
}

.btn-ghost {
  background: transparent;
  color: var(--ink);
  padding: 8px 16px;
}

.btn-ghost:hover {
  background: var(--surface-soft);
}

.btn-icon {
  width: 40px;
  height: 40px;
  border-radius: var(--rounded-full);
  display: inline-flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-soft);
  color: var(--ink);
  transition: background 0.2s var(--ease);
}

.btn-icon:hover {
  background: var(--hairline);
}

.btn-icon-inverse {
  background: var(--on-inverse-soft);
  color: var(--inverse-ink);
}

.btn-icon-inverse:hover {
  background: rgba(255, 255, 255, 0.24);
}

.btn-block {
  width: 100%;
}

.btn:disabled {
  opacity: 0.4;
  cursor: not-allowed;
  transform: none !important;
}

.btn-sm {
  padding: 7px 14px;
  font-size: 14px;
  font-weight: 480;
}

/* ---- Inputs ---- */
input, textarea, select {
  font-family: inherit;
  color: var(--ink);
}

.field {
  margin-bottom: 18px;
  text-align: left;
}

.field label {
  display: block;
  font-size: 18px;
  font-weight: 330;
  color: var(--ink);
  margin-bottom: 8px;
}

.input-wrap {
  position: relative;
  display: flex;
  align-items: center;
}

.input-wrap i.leading {
  position: absolute;
  left: 16px;
  color: var(--ink);
  opacity: 0.4;
  font-size: 16px;
}

.field input,
.field select {
  width: 100%;
  padding: 12px 14px;
  padding-left: 44px;
  border-radius: var(--rounded-md);
  background: var(--canvas);
  border: 1px solid var(--hairline);
  color: var(--ink);
  font-size: 16px;
  font-weight: 320;
  line-height: 1.45;
  transition: border-color 0.2s var(--ease), box-shadow 0.2s var(--ease);
}

.field input:focus,
.field select:focus {
  outline: none;
  border-color: var(--primary);
  box-shadow: 0 0 0 2px var(--primary);
}

.field input::placeholder {
  color: var(--ink);
  opacity: 0.35;
}

.input-wrap .toggle-visibility {
  position: absolute;
  right: 12px;
  color: var(--ink);
  opacity: 0.4;
  padding: 4px;
  background: none;
  border: none;
  cursor: pointer;
}

.input-wrap .toggle-visibility:hover {
  opacity: 0.7;
}

.field-hint {
  font-size: 14px;
  color: var(--ink);
  opacity: 0.5;
  margin-top: 6px;
}

.field-error {
  font-size: 14px;
  color: var(--danger);
  margin-top: 6px;
  display: none;
}

.field.has-error input {
  border-color: var(--danger);
}

.field.has-error .field-error {
  display: block;
}

/* ---- Color Block Sections (Signature) ---- */
.color-block {
  border-radius: var(--rounded-lg);
  padding: var(--spacing-xxl);
  width: 100%;
}

.color-block-lime {
  background: var(--block-lime);
}

.color-block-lilac {
  background: var(--block-lilac);
}

.color-block-cream {
  background: var(--block-cream);
}

.color-block-mint {
  background: var(--block-mint);
}

.color-block-pink {
  background: var(--block-pink);
}

.color-block-coral {
  background: var(--block-coral);
}

.color-block-navy {
  background: var(--block-navy);
  color: var(--inverse-ink);
}

/* ---- Cards ---- */
.card {
  background: var(--canvas);
  border: 1px solid var(--hairline);
  border-radius: var(--rounded-lg);
  padding: var(--spacing-lg);
}

.card-soft {
  background: var(--surface-soft);
  border-radius: var(--rounded-md);
  padding: var(--spacing-md);
}

/* ---- Toasts ---- */
#toast-container {
  position: fixed;
  top: 20px;
  right: 20px;
  z-index: 9999;
  display: flex;
  flex-direction: column;
  gap: 10px;
  max-width: 340px;
}

.toast {
  display: flex;
  align-items: center;
  gap: 10px;
  padding: 14px 16px;
  border-radius: var(--rounded-md);
  background: var(--canvas);
  border: 1px solid var(--hairline);
  font-size: 14px;
  font-weight: 330;
  opacity: 0;
  transform: translateX(30px);
  transition: opacity 0.3s var(--ease), transform 0.3s var(--ease);
}

.toast.show {
  opacity: 1;
  transform: translateX(0);
}

.toast-success i { color: var(--success); }
.toast-error i { color: var(--danger); }
.toast-info i { color: var(--primary); }
.toast-warning i { color: var(--warning); }

/* ---- Loading ---- */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid var(--hairline);
  border-top-color: var(--ink);
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
}

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

.skeleton {
  background: linear-gradient(90deg, var(--surface-soft) 25%, var(--hairline) 50%, var(--surface-soft) 75%);
  background-size: 200% 100%;
  animation: shimmer 1.6s infinite;
  border-radius: var(--rounded-sm);
}

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

/* ---- Presence Ring ---- */
.avatar-ring {
  position: relative;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  flex-shrink: 0;
}

.avatar-ring::before {
  content: '';
  position: absolute;
  inset: -3px;
  border-radius: 50%;
  padding: 2px;
  background: var(--success);
  -webkit-mask-composite: xor;
  mask-composite: exclude;
  opacity: 0;
  transition: opacity 0.3s var(--ease);
}

.avatar-ring.online::before {
  opacity: 1;
}

.avatar-ring.offline::before {
  opacity: 0;
}

.avatar-ring img,
.avatar-ring .avatar-fallback {
  width: 100%;
  height: 100%;
  border-radius: 50%;
  object-fit: cover;
  border: 2px solid var(--canvas);
}

.avatar-ring .avatar-fallback {
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--surface-soft);
  color: var(--ink);
  font-weight: 540;
}

.status-dot {
  position: absolute;
  bottom: 0;
  right: 0;
  width: 12px;
  height: 12px;
  border-radius: 50%;
  border: 2.5px solid var(--canvas);
  background: var(--ink);
  opacity: 0.35;
}

.status-dot.online {
  background: var(--success);
  opacity: 1;
}

/* ---- Page Transition ---- */
.page-enter {
  animation: page-in 0.5s var(--ease) both;
}

@keyframes page-in {
  from { opacity: 0; transform: translateY(12px); }
  to { opacity: 1; transform: translateY(0); }
}

/* ---- Utility ---- */
.text-dim {
  color: var(--ink);
  opacity: 0.5;
}

.text-center {
  text-align: center;
}

.hidden {
  display: none !important;
}

/* ---- Scrollbar ---- */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: transparent;
}

::-webkit-scrollbar-thumb {
  background: var(--hairline);
  border-radius: var(--rounded-full);
}

::-webkit-scrollbar-thumb:hover {
  background: var(--ink);
  opacity: 0.3;
}

/* ---- Focus Visibility ---- */
:focus-visible {
  outline: 2px solid var(--primary);
  outline-offset: 2px;
  border-radius: var(--rounded-xs);
}