/* SaferRun App — Design System Mobile First */
:root {
  --bg: #0B0F19;
  --bg2: #111827;
  --bg3: #1a2235;
  --border: rgba(255,255,255,0.07);
  --text: #F1F5F9;
  --muted: #94A3B8;
  --primary: #FF6B35;
  --primary-dim: rgba(255,107,53,0.12);
  --green: #00E5A0;
  --purple: #8B5CF6;
  --yellow: #FBBF24;
  --red: #EF4444;
  --gradient: linear-gradient(135deg,#FF6B35,#FF9F1C);
  --radius: 16px;
  --radius-sm: 10px;
  --font: 'Inter',system-ui,sans-serif;
  --nav-h: 72px;
}

*,*::before,*::after{box-sizing:border-box;margin:0;padding:0;}
html{height:100%;-webkit-tap-highlight-color:transparent;}
body{
  font-family:var(--font);background:var(--bg);color:var(--text);
  min-height:100%;max-width:430px;margin:0 auto;
  -webkit-font-smoothing:antialiased;overflow-x:hidden;
  padding-bottom:var(--nav-h);
}

/* Scrollbar */
::-webkit-scrollbar{width:4px;}
::-webkit-scrollbar-track{background:transparent;}
::-webkit-scrollbar-thumb{background:var(--border);border-radius:4px;}

/* Typography */
h1{font-size:1.75rem;font-weight:800;line-height:1.2;}
h2{font-size:1.35rem;font-weight:700;line-height:1.3;}
h3{font-size:1.1rem;font-weight:700;}
p{line-height:1.6;}

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

/* Cards */
.card{
  background:var(--bg2);border:1px solid var(--border);
  border-radius:var(--radius);padding:20px;
}
.card-sm{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px;}

/* Buttons */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:8px;
  padding:14px 24px;border-radius:var(--radius-sm);
  font-family:var(--font);font-size:1rem;font-weight:600;
  border:none;cursor:pointer;text-decoration:none;
  transition:all 0.25s ease;width:100%;
}
.btn-primary{background:var(--gradient);color:#fff;box-shadow:0 4px 20px rgba(255,107,53,0.3);}
.btn-primary:active{transform:scale(0.97);}
.btn-ghost{background:rgba(255,255,255,0.05);color:var(--text);border:1px solid var(--border);}
.btn-ghost:active{background:rgba(255,255,255,0.1);}
.btn-sm{padding:10px 18px;font-size:0.875rem;}
.btn-icon{width:44px;height:44px;padding:0;border-radius:12px;}

/* Inputs */
.input-group{margin-bottom:16px;}
.input-label{font-size:0.8rem;font-weight:600;color:var(--muted);text-transform:uppercase;letter-spacing:1px;margin-bottom:8px;display:block;}
.input{
  width:100%;padding:14px 16px;border-radius:var(--radius-sm);
  background:var(--bg3);border:1px solid var(--border);
  color:var(--text);font-family:var(--font);font-size:1rem;
  outline:none;transition:border-color 0.2s;
}
.input:focus{border-color:var(--primary);}
.input::placeholder{color:var(--muted);}
select.input{cursor:pointer;}

/* Tags / Pills */
.tag{
  display:inline-flex;align-items:center;gap:4px;
  padding:4px 12px;border-radius:50px;font-size:0.75rem;font-weight:700;
}
.tag-orange{background:var(--primary-dim);color:var(--primary);}
.tag-green{background:rgba(0,229,160,0.12);color:var(--green);}
.tag-purple{background:rgba(139,92,246,0.12);color:var(--purple);}
.tag-red{background:rgba(239,68,68,0.12);color:var(--red);}

/* Bottom Navigation */
.bottom-nav{
  position:fixed;bottom:0;left:50%;transform:translateX(-50%);
  width:100%;max-width:430px;height:var(--nav-h);
  background:rgba(17,24,39,0.95);backdrop-filter:blur(20px);
  border-top:1px solid var(--border);
  display:flex;align-items:center;justify-content:space-around;
  padding:0 8px;z-index:100;
}
.nav-item{
  display:flex;flex-direction:column;align-items:center;gap:4px;
  padding:8px 16px;border-radius:12px;text-decoration:none;
  color:var(--muted);font-size:0.65rem;font-weight:600;
  text-transform:uppercase;letter-spacing:0.5px;
  transition:all 0.2s;flex:1;
}
.nav-item.active{color:var(--primary);}
.nav-item i{font-size:1.35rem;}
.nav-item.active i{filter:drop-shadow(0 0 6px var(--primary));}

/* Top Header */
.top-header{
  position:sticky;top:0;z-index:50;
  display:flex;align-items:center;justify-content:space-between;
  padding:16px 20px;
  background:rgba(11,15,25,0.9);backdrop-filter:blur(20px);
  border-bottom:1px solid var(--border);
}
.top-header .logo{display:flex;align-items:center;gap:8px;font-weight:800;font-size:1.1rem;}
.top-header .logo-icon{width:32px;height:32px;border-radius:9px;background:var(--gradient);display:flex;align-items:center;justify-content:center;font-size:1rem;}

/* Page container */
.page{padding:0 20px 24px;animation:fadeIn 0.3s ease;}
@keyframes fadeIn{from{opacity:0;transform:translateY(10px);}to{opacity:1;transform:translateY(0);}}

/* Section header */
.section-header{display:flex;align-items:center;justify-content:space-between;margin-bottom:14px;}
.section-title{font-size:0.8rem;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:1.5px;}
.section-link{font-size:0.8rem;color:var(--primary);font-weight:600;}

/* Progress bar */
.progress{height:6px;border-radius:6px;background:rgba(255,255,255,0.08);overflow:hidden;margin-top:8px;}
.progress-bar{height:100%;border-radius:6px;background:var(--gradient);transition:width 1s ease;}

/* Avatar */
.avatar{border-radius:50%;object-fit:cover;background:var(--bg3);}

/* Divider */
.divider{height:1px;background:var(--border);margin:20px 0;}

/* Empty state */
.empty-state{text-align:center;padding:40px 20px;color:var(--muted);}
.empty-state i{font-size:3rem;opacity:0.3;margin-bottom:12px;display:block;}

/* Toast */
.toast{
  position:fixed;top:20px;left:50%;transform:translateX(-50%) translateY(-80px);
  background:var(--bg3);border:1px solid var(--border);
  padding:14px 20px;border-radius:var(--radius-sm);
  font-size:0.9rem;font-weight:600;z-index:999;
  transition:transform 0.35s cubic-bezier(0.34,1.56,0.64,1);
  white-space:nowrap;box-shadow:0 10px 40px rgba(0,0,0,0.4);
}
.toast.show{transform:translateX(-50%) translateY(0);}
.toast.success{border-color:var(--green);color:var(--green);}
.toast.error{border-color:var(--red);color:var(--red);}

/* Skeleton loading */
.skeleton{
  background:linear-gradient(90deg,var(--bg2) 25%,var(--bg3) 50%,var(--bg2) 75%);
  background-size:200% 100%;animation:shimmer 1.5s infinite;
  border-radius:8px;
}
@keyframes shimmer{0%{background-position:200% 0;}100%{background-position:-200% 0;}}

/* Metric grid */
.metrics{display:grid;grid-template-columns:repeat(3,1fr);gap:12px;margin-bottom:20px;}
.metric{background:var(--bg2);border:1px solid var(--border);border-radius:var(--radius-sm);padding:14px;text-align:center;}
.metric-value{font-size:1.5rem;font-weight:800;color:var(--primary);display:block;}
.metric-label{font-size:0.65rem;font-weight:700;color:var(--muted);text-transform:uppercase;letter-spacing:1px;margin-top:2px;}

/* Chat bubbles */
.chat-bubble{padding:12px 16px;border-radius:16px;max-width:82%;font-size:0.9rem;line-height:1.5;margin-bottom:10px;}
.chat-bubble.bot{background:rgba(139,92,246,0.1);border:1px solid rgba(139,92,246,0.15);align-self:flex-start;border-bottom-left-radius:4px;color:var(--muted);}
.chat-bubble.user{background:rgba(255,107,53,0.12);border:1px solid rgba(255,107,53,0.2);align-self:flex-end;border-bottom-right-radius:4px;}

/* Workout type colors */
.type-easy_run{color:#00E5A0;}
.type-interval{color:#FF6B35;}
.type-long_run{color:#8B5CF6;}
.type-tempo{color:#FBBF24;}
.type-recovery{color:#94A3B8;}
.type-rest{color:#475569;}
.type-strength{color:#EF4444;}

/* Step indicator */
.steps{display:flex;align-items:center;gap:8px;margin-bottom:28px;}
.step-dot{width:8px;height:8px;border-radius:50%;background:var(--bg3);border:1px solid var(--border);transition:all 0.3s;}
.step-dot.active{background:var(--primary);border-color:var(--primary);width:24px;border-radius:4px;}
.step-dot.done{background:var(--green);border-color:var(--green);}

/* Swipeable workout card */
.workout-day-card{
  display:flex;gap:14px;align-items:flex-start;
  background:var(--bg2);border:1px solid var(--border);
  border-radius:var(--radius);padding:16px;margin-bottom:12px;
  transition:all 0.2s;
}
.workout-day-card:active{transform:scale(0.99);}
.workout-day{text-align:center;min-width:40px;}
.workout-day .day-name{font-size:0.65rem;font-weight:700;color:var(--muted);text-transform:uppercase;}
.workout-day .day-num{font-size:1.2rem;font-weight:800;}
.workout-info{flex:1;}
.workout-title{font-weight:700;margin-bottom:4px;}
.workout-meta{display:flex;gap:12px;font-size:0.78rem;color:var(--muted);}
.workout-meta i{color:var(--primary);}
.workout-status{margin-left:auto;font-size:1.2rem;}

/* Pill tabs */
.tabs{display:flex;gap:8px;margin-bottom:20px;overflow-x:auto;padding-bottom:2px;}
.tabs::-webkit-scrollbar{display:none;}
.tab{padding:8px 16px;border-radius:50px;font-size:0.8rem;font-weight:700;white-space:nowrap;cursor:pointer;border:none;background:var(--bg2);color:var(--muted);border:1px solid var(--border);}
.tab.active{background:var(--primary-dim);color:var(--primary);border-color:var(--primary);}