/* ═══════════════════════════════════════════════════════════════════════════
   D-DEY PMS — UNIFIED DESIGN SYSTEM v4.0
   Phase 1: Design Tokens, Typography, Base Components
   Font stack: DM Serif Display (headings) + DM Sans (body) — consistent
   Color: Medical Teal, clean neutrals, clinical precision
   Motion: Apple-grade spring physics, 60fps GPU-accelerated
═══════════════════════════════════════════════════════════════════════════ */

/* ── GOOGLE FONTS IMPORT ─────────────────────────────────────────────── */
@import url('https://fonts.googleapis.com/css2?family=DM+Serif+Display:ital@0;1&family=DM+Sans:opsz,wght@9..40,300;9..40,400;9..40,500;9..40,600;9..40,700&family=JetBrains+Mono:wght@400;500;600&display=swap');

/* ── DESIGN TOKENS: LIGHT MODE ─────────────────────────────────────────── */
:root {
  /* Brand */
  --brand-teal:       #0D9488;
  --brand-teal-dark:  #0F766E;
  --brand-teal-deep:  #134E4A;
  --brand-teal-light: #CCFBF1;
  --brand-sky:        #0EA5E9;

  /* Semantic */
  --primary:          #0D9488;
  --primary-dark:     #0F766E;
  --secondary:        #0EA5E9;
  --warning:          #F59E0B;
  --danger:           #EF4444;
  --success:          #10B981;

  /* Surfaces */
  --bg:               #F5F7FA;
  --bg-gradient:      linear-gradient(160deg, #F0FDFA 0%, #EEF2F7 100%);
  --surface:          #FFFFFF;
  --surface-raised:   #FFFFFF;
  --surface-overlay:  rgba(255,255,255,0.85);
  --card-bg:          #FFFFFF;
  --input-bg:         #F8FAFC;

  /* Typography */
  --text-main:        #0F172A;
  --text-secondary:   #475569;
  --text-light:       #94A3B8;
  --text-inverse:     #FFFFFF;

  /* Borders */
  --border:           #E2E8F0;
  --border-focus:     #0D9488;

  /* Shadows — layered, ultra-realistic depth */
  --shadow-xs:        0 1px 2px rgba(15,23,42,0.05), 0 0 1px rgba(15,23,42,0.08);
  --shadow-sm:        0 1px 3px rgba(15,23,42,0.06), 0 4px 12px rgba(15,23,42,0.06);
  --shadow-md:        0 2px 4px rgba(15,23,42,0.04), 0 8px 24px rgba(15,23,42,0.08);
  --shadow-lg:        0 4px 8px rgba(15,23,42,0.04), 0 16px 40px rgba(15,23,42,0.10);
  --shadow-xl:        0 8px 16px rgba(15,23,42,0.06), 0 32px 56px rgba(15,23,42,0.12);
  --shadow-primary:   0 4px 14px rgba(13,148,136,0.22), 0 8px 28px rgba(13,148,136,0.14);
  --shadow-modal:     0 24px 48px rgba(15,23,42,0.18), 0 48px 80px rgba(15,23,42,0.14);
  --shadow-hover:     0 8px 24px rgba(15,23,42,0.10), 0 20px 48px rgba(15,23,42,0.08);

  /* Radius */
  --radius-xs:  6px;
  --radius-sm:  10px;
  --radius-md:  14px;
  --radius-lg:  20px;
  --radius-xl:  24px;
  --radius-2xl: 32px;
  --radius-full: 9999px;

  /* Motion — Apple-grade spring physics */
  --ease-spring:    cubic-bezier(0.34, 1.56, 0.64, 1);
  --ease-smooth:    cubic-bezier(0.22, 1, 0.36, 1);
  --ease-in-out:    cubic-bezier(0.4, 0, 0.2, 1);
  --ease-out:       cubic-bezier(0, 0, 0.2, 1);
  --ease-bounce:    cubic-bezier(0.175, 0.885, 0.32, 1.275);
  --ease-expo:      cubic-bezier(0.16, 1, 0.3, 1);
  --t-fast:         100ms;
  --t-base:         180ms;
  --t-slow:         320ms;
  --t-page:         380ms;

  /* Layout */
  --nav-height:     68px;
  --header-height:  60px;
  --safe-bottom:    env(safe-area-inset-bottom, 0px);
  --safe-top:       env(safe-area-inset-top, 0px);

  /* Teal glow for active states */
  --glow-teal:      0 0 0 3px rgba(13,148,136,0.15), 0 0 16px rgba(13,148,136,0.08);
}

/* ── DESIGN TOKENS: DARK MODE ─────────────────────────────────────────── */
body.dark-mode {
  --bg:               #080E14;
  --bg-gradient:      linear-gradient(160deg, #0A1628 0%, #0D1B2A 100%);
  --surface:          #101E2E;
  --surface-raised:   #162336;
  --surface-overlay:  rgba(16,30,46,0.92);
  --card-bg:          #111E30;
  --input-bg:         #0E1A28;

  --text-main:        #F0F6FC;
  --text-secondary:   #8BA4BE;
  --text-light:       #4A6478;

  --border:           #1E3044;
  --border-focus:     #2DD4BF;

  --primary:          #2DD4BF;
  --primary-dark:     #14B8A6;

  --shadow-xs:        0 1px 2px rgba(0,0,0,0.25), 0 0 1px rgba(0,0,0,0.35);
  --shadow-sm:        0 1px 3px rgba(0,0,0,0.3), 0 4px 12px rgba(0,0,0,0.25);
  --shadow-md:        0 2px 4px rgba(0,0,0,0.2), 0 8px 24px rgba(0,0,0,0.35);
  --shadow-lg:        0 4px 8px rgba(0,0,0,0.2), 0 16px 40px rgba(0,0,0,0.4);
  --shadow-xl:        0 8px 16px rgba(0,0,0,0.25), 0 32px 56px rgba(0,0,0,0.5);
  --shadow-primary:   0 4px 14px rgba(45,212,191,0.18), 0 8px 28px rgba(45,212,191,0.12);
  --shadow-modal:     0 24px 48px rgba(0,0,0,0.55), 0 48px 80px rgba(0,0,0,0.4);
  --shadow-hover:     0 8px 24px rgba(0,0,0,0.35), 0 20px 48px rgba(0,0,0,0.25);
  --glow-teal:        0 0 0 3px rgba(45,212,191,0.15), 0 0 16px rgba(45,212,191,0.08);
}

/* ── GLOBAL RESET & BASE ─────────────────────────────────────────────── */
*, *::before, *::after {
  margin: 0; padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

html {
  font-size: 14px;
  scroll-behavior: smooth;
  height: 100%;
  /* Enable momentum scrolling globally */
  -webkit-overflow-scrolling: touch;
}

body {
  font-family: 'DM Sans', system-ui, -apple-system, sans-serif;
  font-weight: 400;
  background: var(--bg-gradient);
  color: var(--text-main);
  height: 100dvh;
  overflow: hidden;
  display: flex;
  flex-direction: column;
  /* Hardware accelerate the body */
  transform: translateZ(0);
}

.hidden { display: none !important; }

/* ── TYPOGRAPHY SYSTEM ────────────────────────────────────────────────── */
/* Headings use DM Serif Display */
h1, h2, h3, .ds-heading {
  font-family: 'DM Serif Display', Georgia, serif;
  letter-spacing: -0.02em;
  line-height: 1.15;
}

/* Body text uses DM Sans */
p, span, label, input, select, button, .ds-body {
  font-family: 'DM Sans', system-ui, sans-serif;
}

/* Monospace for numbers/codes */
.ds-mono, .mono-num {
  font-family: 'JetBrains Mono', 'SF Mono', monospace;
  font-variant-numeric: tabular-nums;
}

/* ── SCROLLBAR STYLING ────────────────────────────────────────────────── */
::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb {
  background: var(--border);
  border-radius: var(--radius-full);
  transition: background var(--t-base);
}
::-webkit-scrollbar-thumb:hover { background: var(--text-light); }

/* ── SELECTION ────────────────────────────────────────────────────────── */
::selection {
  background: rgba(13,148,136,0.2);
  color: var(--text-main);
}

/* ── FOCUS RING ───────────────────────────────────────────────────────── */
:focus-visible {
  outline: none;
  box-shadow: var(--glow-teal);
  transition: box-shadow var(--t-base) var(--ease-out);
}

/* ── SHARED ANIMATION KEYFRAMES ───────────────────────────────────────── */
@keyframes fadeIn {
  from { opacity: 0; }
  to { opacity: 1; }
}

@keyframes slideUp {
  from { opacity: 0; transform: translateY(20px); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes slideUpSpring {
  from { opacity: 0; transform: translateY(100%); }
  to { opacity: 1; transform: translateY(0); }
}

@keyframes scaleIn {
  from { opacity: 0; transform: scale(0.92); }
  to { opacity: 1; transform: scale(1); }
}

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

@keyframes livePulse {
  0%, 100% { opacity: 1; transform: scale(1); }
  50% { opacity: 0.5; transform: scale(0.85); }
}

@keyframes spinPulse {
  0% { transform: rotate(0deg) scale(1); }
  50% { transform: rotate(180deg) scale(1.05); }
  100% { transform: rotate(360deg) scale(1); }
}

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

@keyframes toastIn {
  from { opacity: 0; transform: translateX(110%); }
  to { opacity: 1; transform: translateX(0); }
}

@keyframes toastOut {
  from { opacity: 1; transform: translateX(0); }
  to { opacity: 0; transform: translateX(110%); }
}

/* ── BUTTONS — DESIGN SYSTEM ─────────────────────────────────────────── */
.ds-btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 7px;
  border: none;
  border-radius: var(--radius-md);
  font-family: 'DM Sans', sans-serif;
  font-weight: 600;
  font-size: 0.88rem;
  letter-spacing: 0.01em;
  cursor: pointer;
  transition:
    background var(--t-base) var(--ease-out),
    box-shadow var(--t-slow) var(--ease-smooth),
    transform var(--t-fast) var(--ease-spring),
    opacity var(--t-base);
  will-change: transform;
  user-select: none;
  white-space: nowrap;
  backface-visibility: hidden;
  -webkit-backface-visibility: hidden;
}

.ds-btn:active { transform: scale(0.96); }
.ds-btn:disabled { opacity: 0.45; pointer-events: none; }

/* Primary */
.ds-btn-primary {
  background: var(--primary);
  color: var(--text-inverse);
  box-shadow: var(--shadow-primary);
  padding: 13px 20px;
}
.ds-btn-primary:hover {
  background: var(--primary-dark);
  box-shadow: 0 6px 24px rgba(13,148,136,0.38);
}

/* Secondary */
.ds-btn-secondary {
  background: var(--surface);
  color: var(--text-main);
  border: 1px solid var(--border);
  box-shadow: var(--shadow-sm);
  padding: 13px 20px;
}
.ds-btn-secondary:hover { background: var(--input-bg); }

/* Ghost */
.ds-btn-ghost {
  background: transparent;
  color: var(--primary);
  padding: 10px 16px;
}
.ds-btn-ghost:hover { background: rgba(13,148,136,0.08); }

/* Danger */
.ds-btn-danger {
  background: rgba(239,68,68,0.10);
  color: var(--danger);
  padding: 10px 16px;
  border: 1px solid rgba(239,68,68,0.20);
}
.ds-btn-danger:hover { background: rgba(239,68,68,0.18); }

/* Icon btn */
.ds-icon-btn {
  width: 40px; height: 40px;
  border-radius: var(--radius-sm);
  background: transparent;
  border: none;
  color: var(--text-secondary);
  display: flex; align-items: center; justify-content: center;
  cursor: pointer;
  transition: background var(--t-fast), color var(--t-fast), transform var(--t-fast) var(--ease-spring);
}
.ds-icon-btn:hover { background: var(--input-bg); color: var(--text-main); }
.ds-icon-btn:active { transform: scale(0.90); }

/* ── CARD SYSTEM ──────────────────────────────────────────────────────── */
.ds-card {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-sm);
  overflow: hidden;
  transition:
    transform var(--t-slow) var(--ease-smooth),
    box-shadow var(--t-slow) var(--ease-smooth),
    border-color var(--t-base) var(--ease-out);
  will-change: transform;
}
.ds-card:hover {
  transform: translateY(-2px);
  box-shadow: var(--shadow-md);
}

.ds-card-elevated {
  background: var(--card-bg);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-md);
}

/* ── INPUT SYSTEM ─────────────────────────────────────────────────────── */
.ds-input {
  width: 100%;
  background: var(--input-bg);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-md);
  color: var(--text-main);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.9rem;
  font-weight: 400;
  padding: 12px 14px;
  outline: none;
  transition: border-color var(--t-base), box-shadow var(--t-base), background var(--t-base);
  -webkit-appearance: none;
}
.ds-input::placeholder { color: var(--text-light); }
.ds-input:focus {
  border-color: var(--primary);
  box-shadow: var(--glow-teal);
  background: var(--surface);
}

/* ── BADGE / PILL ─────────────────────────────────────────────────────── */
.ds-badge {
  display: inline-flex;
  align-items: center;
  gap: 4px;
  padding: 3px 10px;
  border-radius: var(--radius-full);
  font-family: 'DM Sans', sans-serif;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
}

.ds-badge-teal {
  background: rgba(13,148,136,0.12);
  color: var(--primary);
  border: 1px solid rgba(13,148,136,0.22);
}

.ds-badge-warning {
  background: rgba(245,158,11,0.12);
  color: var(--warning);
  border: 1px solid rgba(245,158,11,0.22);
}

.ds-badge-danger {
  background: rgba(239,68,68,0.12);
  color: var(--danger);
  border: 1px solid rgba(239,68,68,0.22);
}

/* ── DIVIDER ──────────────────────────────────────────────────────────── */
.ds-divider {
  height: 1px;
  background: var(--border);
  border: none;
  margin: 0;
}

/* ── SECTION LABEL ────────────────────────────────────────────────────── */
.ds-section-label {
  font-family: 'DM Sans', sans-serif;
  font-size: 0.68rem;
  font-weight: 700;
  letter-spacing: 0.10em;
  text-transform: uppercase;
  color: var(--text-light);
  display: flex;
  align-items: center;
  gap: 8px;
  padding: 0 0 8px;
}
.ds-section-label::after {
  content: '';
  flex: 1;
  height: 1px;
  background: var(--border);
}

/* ── TOAST NOTIFICATION ───────────────────────────────────────────────── */
.ds-toast-container {
  position: fixed;
  top: calc(var(--safe-top) + 16px);
  right: 16px;
  z-index: 99999;
  display: flex;
  flex-direction: column;
  gap: 8px;
  pointer-events: none;
}

.ds-toast {
  pointer-events: all;
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-md);
  box-shadow: var(--shadow-xl);
  padding: 12px 16px;
  display: flex;
  align-items: center;
  gap: 10px;
  max-width: 300px;
  animation: toastIn var(--t-slow) var(--ease-smooth) both;
  backdrop-filter: blur(20px);
}

.ds-toast.exit { animation: toastOut var(--t-base) var(--ease-in-out) both; }

.ds-toast-icon {
  width: 30px; height: 30px;
  border-radius: var(--radius-sm);
  display: flex; align-items: center; justify-content: center;
  flex-shrink: 0;
  font-size: 1rem;
}

.ds-toast.success .ds-toast-icon { background: rgba(16,185,129,0.12); color: var(--success); }
.ds-toast.error .ds-toast-icon { background: rgba(239,68,68,0.12); color: var(--danger); }
.ds-toast.warning .ds-toast-icon { background: rgba(245,158,11,0.12); color: var(--warning); }
.ds-toast.info .ds-toast-icon { background: rgba(13,148,136,0.12); color: var(--primary); }

.ds-toast-body { flex: 1; }
.ds-toast-title { font-weight: 600; font-size: 0.82rem; color: var(--text-main); }
.ds-toast-msg { font-size: 0.75rem; color: var(--text-secondary); margin-top: 1px; }

/* ── LOADING SKELETON ─────────────────────────────────────────────────── */
.ds-skeleton {
  background: linear-gradient(
    90deg,
    var(--border) 25%,
    var(--input-bg) 50%,
    var(--border) 75%
  );
  background-size: 200% 100%;
  animation: shimmer 1.8s ease-in-out infinite;
  border-radius: var(--radius-sm);
}

/* ── ROLE BADGE ───────────────────────────────────────────────────────── */
.role-badge {
  font-size: 0.60rem;
  background: rgba(13,148,136,0.12);
  color: var(--primary);
  padding: 2px 8px;
  border-radius: var(--radius-full);
  font-weight: 700;
  letter-spacing: 0.05em;
  text-transform: uppercase;
  border: 1px solid rgba(13,148,136,0.20);
  align-self: flex-start;
  font-family: 'DM Sans', sans-serif;
}