/* ============================================================
   FaultTreeNexus — Main Stylesheet
   InstruNexus Process Safety Suite
   ============================================================ */

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

:root {
  --navy:         #182D46;
  --navy-dark:    #0F1D2F;
  --navy-mid:     #1E4F7A;
  --slate:        #414F5E;
  --off-white:    #F6F5F2;
  --warm-grey:    #C8C2C2;
  --mid-grey:     #9FA3A8;
  --teal:         #1E7A6E;
  --teal-lt:      #27AE9E;
  --amber:        #C17D0E;
  --amber-lt:     #E67E22;
  --white:        #ffffff;
  --danger:       #B4382F;
  --danger-lt:    #E74C3C;
  --success:      #1D7A4A;
  --success-lt:   #27AE60;
  --warning:      #C17D0E;
  --warning-lt:   #E67E22;
  --extreme:      #6C3483;
  --info:         #1A5EA6;
  --info-lt:      #2980B9;
  --text-dark:    #12202E;
  --text-mid:     #414F5E;
  --text-light:   #6E757E;
  --border:       #E0DEDA;
  --border-dark:  #C8C2C2;
  --radius:       10px;
  --radius-sm:    6px;
  --radius-lg:    14px;
  --shadow-sm:    0 1px 4px rgba(24,45,70,.08);
  --shadow:       0 3px 12px rgba(24,45,70,.10);
  --shadow-md:    0 6px 24px rgba(24,45,70,.14);
  --shadow-lg:    0 12px 40px rgba(24,45,70,.18);
  --sidebar-w:    262px;
  --topbar-h:     62px;
  --transition:   0.2s ease;
}

html{font-size:15px;-webkit-text-size-adjust:100%}
body{
  font-family:'Inter',-apple-system,BlinkMacSystemFont,'Segoe UI',sans-serif;
  background:var(--off-white);
  color:var(--text-dark);
  line-height:1.65;
  -webkit-font-smoothing:antialiased;
  overflow-x:hidden;
}
a{color:var(--navy-mid);text-decoration:none}
a:hover{color:var(--teal);text-decoration:underline}
img{max-width:100%;height:auto}

/* ── Layout ── */
.sidebar{
  position:fixed;top:0;left:0;bottom:0;
  width:var(--sidebar-w);
  background:linear-gradient(180deg,#1A3F5C 0%,#182D46 45%,#0F1D2F 100%);
  display:flex;flex-direction:column;
  z-index:200;
  transition:transform var(--transition);
  overflow-y:auto;overflow-x:hidden;
  border-right:1px solid rgba(255,255,255,.04);
  -webkit-overflow-scrolling:touch;
}
.main-wrapper{margin-left:var(--sidebar-w);min-height:100vh;display:flex;flex-direction:column}
.topbar{
  position:sticky;top:0;
  height:var(--topbar-h);
  background:var(--white);
  border-bottom:2px solid var(--border);
  border-top:3px solid var(--teal);
  display:flex;align-items:center;
  padding:0 28px;gap:12px;
  z-index:100;
  box-shadow:0 2px 12px rgba(24,45,70,.08);
}
.content{padding:30px 34px;flex:1}

/* ── Sidebar Brand ── */
.sidebar-brand{
  display:flex;align-items:center;gap:12px;
  padding:22px 20px 20px;
  border-bottom:1px solid rgba(255,255,255,.06);
  background:rgba(0,0,0,.15);
  position:relative;
  flex-shrink:0;
}
.sidebar-brand::after{
  content:'';position:absolute;bottom:0;left:16px;right:16px;
  height:1px;
  background:linear-gradient(90deg,transparent,rgba(30,122,110,.5),transparent);
}
.brand-logo{
  width:44px;height:44px;border-radius:10px;overflow:hidden;
  flex-shrink:0;
  background:linear-gradient(135deg,#1E7A6E,#155E54);
  display:flex;align-items:center;justify-content:center;
  box-shadow:0 4px 12px rgba(0,0,0,.35);
  border:1.5px solid rgba(255,255,255,.12);
}
.brand-logo svg{width:100%;height:100%}
.brand-text{display:flex;flex-direction:column;gap:2px}
.brand-name{color:#fff;font-weight:800;font-size:15px;letter-spacing:-.2px}
.brand-sub{color:rgba(200,194,194,.5);font-size:9.5px;font-weight:500;letter-spacing:.8px;text-transform:uppercase}

/* ── Sidebar Nav ── */
.sidebar-nav{flex:1;padding:6px 0 16px;overflow-y:auto;-webkit-overflow-scrolling:touch}
.nav-section-label{
  display:flex;align-items:center;gap:10px;
  color:rgba(30,122,110,.7);
  font-size:9px;font-weight:700;letter-spacing:2px;text-transform:uppercase;
  padding:18px 18px 6px;
}
.nav-section-label::after{content:'';flex:1;height:1px;background:rgba(255,255,255,.06)}
.nav-item{
  display:flex;align-items:center;gap:10px;
  padding:9px 10px;margin:2px 10px;
  color:rgba(246,245,242,.55);
  font-size:13.5px;font-weight:400;
  border-radius:8px;
  transition:all var(--transition);
  text-decoration:none;
  -webkit-tap-highlight-color:transparent;
  touch-action:manipulation;
}
.nav-item:hover,.nav-item:focus{background:rgba(255,255,255,.07);color:rgba(246,245,242,.92);text-decoration:none}
.nav-item.active{
  background:rgba(30,122,110,.2);
  color:#fff;font-weight:600;
  border-left:3px solid var(--teal-lt);
  padding-left:7px;
}
.nav-icon-box{
  width:22px;height:22px;flex-shrink:0;
  display:flex;align-items:center;justify-content:center;
}
.nav-icon-box svg{width:15px;height:15px}
.nav-label{flex:1}
.nav-logout{margin-top:4px;color:rgba(180,56,47,.6)}
.nav-logout:hover{background:rgba(180,56,47,.1);color:rgba(220,80,60,.9)}

/* ── Sidebar Footer ── */
.sidebar-footer{
  padding:14px 16px;border-top:1px solid rgba(255,255,255,.06);
  display:flex;align-items:center;gap:10px;
  flex-shrink:0;
}
.user-avatar-sm{
  width:32px;height:32px;border-radius:50%;
  background:var(--teal);
  color:#fff;font-weight:700;font-size:13px;
  display:flex;align-items:center;justify-content:center;
  flex-shrink:0;
}
.sidebar-user-info{display:flex;flex-direction:column;gap:1px;min-width:0}
.sidebar-user-name{color:#fff;font-size:13px;font-weight:600;white-space:nowrap;overflow:hidden;text-overflow:ellipsis}
.sidebar-user-role{color:rgba(200,194,194,.5);font-size:10px;text-transform:uppercase;letter-spacing:.5px}

/* ── Topbar ── */
.sidebar-toggle{
  background:none;border:none;cursor:pointer;
  padding:6px;display:none;flex-direction:column;gap:5px;
  flex-shrink:0;border-radius:6px;
  -webkit-tap-highlight-color:transparent;
  touch-action:manipulation;
}
.sidebar-toggle span{
  display:block;width:22px;height:2px;
  background:var(--slate);border-radius:2px;
  transition:transform .25s ease, opacity .25s ease;
  transform-origin:center;
}
/* Hamburger → X when sidebar open */
.sidebar-toggle.is-open span:nth-child(1){transform:translateY(7px) rotate(45deg)}
.sidebar-toggle.is-open span:nth-child(2){opacity:0;transform:scaleX(0)}
.sidebar-toggle.is-open span:nth-child(3){transform:translateY(-7px) rotate(-45deg)}

.topbar-title{font-size:15px;font-weight:700;color:var(--navy);flex:1;white-space:nowrap;overflow:hidden;text-overflow:ellipsis;min-width:0}
.topbar-right{display:flex;align-items:center;gap:8px;flex-shrink:0}
.topbar-user{display:flex;align-items:center;gap:8px;cursor:pointer;position:relative;padding:4px 6px;border-radius:8px;transition:var(--transition);-webkit-tap-highlight-color:transparent}
.topbar-user:hover{background:var(--off-white)}
.user-avatar{
  width:34px;height:34px;border-radius:50%;
  background:var(--navy);color:#fff;
  font-weight:700;font-size:13px;
  display:flex;align-items:center;justify-content:center;
  flex-shrink:0;
}
.user-name-top{font-size:13px;font-weight:500;color:var(--navy);max-width:120px;overflow:hidden;text-overflow:ellipsis;white-space:nowrap}
.user-dropdown{
  display:none;position:absolute;top:calc(100% + 8px);right:0;
  background:#fff;border:1px solid var(--border);border-radius:var(--radius);
  box-shadow:var(--shadow-md);min-width:160px;overflow:hidden;
  z-index:300;
}
.user-dropdown.open{display:block}
.user-dropdown a{display:block;padding:12px 16px;font-size:13px;color:var(--text-mid)}
.user-dropdown a:hover{background:var(--off-white);color:var(--navy)}
.user-dropdown hr{border:none;border-top:1px solid var(--border);margin:4px 0}

/* ── Sidebar Overlay ── */
.sidebar-overlay{display:none;position:fixed;inset:0;background:rgba(0,0,0,.5);z-index:190;backdrop-filter:blur(2px);-webkit-backdrop-filter:blur(2px)}
.sidebar-overlay.open{display:block}

/* ── Responsive Layout Grid helpers ── */
/* Use these classes instead of hardcoded inline grid styles */
.page-aside-grid      {display:grid;grid-template-columns:360px 1fr;gap:20px}
.page-aside-wide      {display:grid;grid-template-columns:400px 1fr;gap:20px}
.page-aside-right     {display:grid;grid-template-columns:1fr 320px;gap:20px}
.page-aside-right-sm  {display:grid;grid-template-columns:1fr 300px;gap:20px}
.page-main-side       {display:grid;grid-template-columns:2fr 1fr;gap:20px}
.page-2col-grid       {display:grid;grid-template-columns:1fr 1fr;gap:20px}
.page-3col-grid       {display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px}

/* ── Buttons ── */
.btn{
  display:inline-flex;align-items:center;justify-content:center;gap:6px;
  padding:8px 18px;border-radius:var(--radius-sm);
  font-size:13.5px;font-weight:600;
  cursor:pointer;border:1.5px solid transparent;
  transition:all var(--transition);text-decoration:none;line-height:1.4;
  white-space:nowrap;
  -webkit-tap-highlight-color:transparent;
  touch-action:manipulation;
  user-select:none;
}
.btn:hover{text-decoration:none;transform:translateY(-1px);box-shadow:var(--shadow-sm)}
.btn:active{transform:none}
.btn-primary{background:var(--navy);color:#fff;border-color:var(--navy)}
.btn-primary:hover{background:var(--navy-mid);border-color:var(--navy-mid);color:#fff}
.btn-secondary{background:var(--slate);color:#fff;border-color:var(--slate)}
.btn-secondary:hover{background:#35424f;color:#fff}
.btn-teal{background:var(--teal);color:#fff;border-color:var(--teal)}
.btn-teal:hover{background:var(--teal-lt);color:#fff}
.btn-ghost{background:transparent;color:var(--slate);border-color:var(--border)}
.btn-ghost:hover{background:var(--off-white);color:var(--navy)}
.btn-danger{background:var(--danger);color:#fff;border-color:var(--danger)}
.btn-danger:hover{background:#9a2f27;color:#fff}
.btn-warning{background:var(--amber);color:#fff;border-color:var(--amber)}
.btn-warning:hover{background:#a06a0b;color:#fff}
.btn-sm{padding:5px 12px;font-size:12px}
.btn-lg{padding:12px 24px;font-size:15px}
.btn-block{width:100%;display:flex;justify-content:center}
.btn:disabled{opacity:.55;cursor:not-allowed;transform:none}

/* ── Cards ── */
.card{
  background:var(--white);border-radius:var(--radius);
  box-shadow:var(--shadow-sm);border:1px solid var(--border);
  overflow:hidden;
}
.card-header{
  display:flex;align-items:center;justify-content:space-between;flex-wrap:wrap;gap:8px;
  padding:16px 22px;border-bottom:1px solid var(--border);
}
.card-header h3{font-size:15px;font-weight:700;color:var(--navy);margin:0}
.card-body{padding:22px}
.card-footer{padding:14px 22px;border-top:1px solid var(--border);background:var(--off-white)}
.mb-24{margin-bottom:24px}

/* ── Stats Grid ── */
.stats-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(190px,1fr));gap:16px;margin-bottom:24px}
.stat-card{
  background:var(--white);border-radius:var(--radius);
  box-shadow:var(--shadow-sm);border:1px solid var(--border);
  padding:18px 22px;display:flex;align-items:center;gap:16px;
}
.stat-icon{
  width:44px;height:44px;border-radius:10px;
  display:flex;align-items:center;justify-content:center;
  font-size:20px;flex-shrink:0;
}
.stat-icon.navy{background:rgba(24,45,70,.1);color:var(--navy)}
.stat-icon.teal{background:rgba(30,122,110,.1);color:var(--teal)}
.stat-icon.green{background:rgba(29,122,74,.1);color:var(--success)}
.stat-icon.amber{background:rgba(193,125,14,.1);color:var(--amber)}
.stat-icon.danger{background:rgba(180,56,47,.1);color:var(--danger)}
.stat-number{font-size:26px;font-weight:800;color:var(--navy);line-height:1}
.stat-label{font-size:12px;color:var(--text-light);margin-top:3px}

/* ── Tables ── */
.table-wrap{overflow-x:auto;-webkit-overflow-scrolling:touch;max-width:100%}
.data-table{width:100%;border-collapse:collapse;font-size:13.5px;min-width:500px}
.data-table th{
  background:var(--off-white);color:var(--slate);
  font-size:11px;font-weight:700;letter-spacing:.5px;text-transform:uppercase;
  padding:10px 16px;text-align:left;border-bottom:2px solid var(--border);
  white-space:nowrap;position:sticky;top:0;
}
.data-table td{padding:10px 16px;border-bottom:1px solid var(--border);vertical-align:middle}
.data-table tr:last-child td{border-bottom:none}
.data-table tbody tr:hover{background:rgba(24,45,70,.025)}
.text-muted{color:var(--text-light)}
.text-sm{font-size:12px}
.actions{display:flex;gap:6px;flex-wrap:wrap}

/* ── Forms ── */
.form-group{margin-bottom:16px}
.form-label{display:block;font-size:13px;font-weight:600;color:var(--navy);margin-bottom:6px}
.form-label .req{color:var(--danger)}
.form-control{
  width:100%;padding:10px 12px;
  border:1.5px solid var(--border);border-radius:var(--radius-sm);
  font-size:14px;font-family:inherit;color:var(--text-dark);
  background:#fff;transition:border-color var(--transition);
  line-height:1.5;
  /* Prevent iOS zoom on focus (font-size ≥16px) */
  font-size:max(16px,14px);
  -webkit-appearance:none;
}
.form-control:focus{outline:none;border-color:var(--navy);box-shadow:0 0 0 3px rgba(24,45,70,.08)}
.form-control::placeholder{color:var(--mid-grey)}
textarea.form-control{resize:vertical;min-height:80px}
select.form-control{cursor:pointer}
.form-hint{font-size:11.5px;color:var(--text-light);margin-top:4px}
.form-row{display:grid;grid-template-columns:1fr 1fr;gap:16px}
.form-row-3{display:grid;grid-template-columns:1fr 1fr 1fr;gap:16px}
.is-invalid{border-color:var(--danger) !important}
.invalid-feedback{font-size:11.5px;color:var(--danger);margin-top:3px}

/* ── Badges ── */
.badge{
  display:inline-block;padding:2px 9px;border-radius:20px;
  font-size:11px;font-weight:700;letter-spacing:.3px;text-transform:uppercase;white-space:nowrap;
}
.badge-primary  {background:rgba(24,45,70,.12);color:var(--navy)}
.badge-secondary{background:rgba(65,79,94,.1);color:var(--slate)}
.badge-success  {background:rgba(29,122,74,.12);color:var(--success)}
.badge-warning  {background:rgba(193,125,14,.12);color:var(--amber)}
.badge-danger   {background:rgba(180,56,47,.12);color:var(--danger)}
.badge-extreme  {background:rgba(108,52,131,.12);color:var(--extreme)}
.badge-muted    {background:rgba(159,163,168,.15);color:var(--mid-grey)}
.badge-info     {background:rgba(26,94,166,.1);color:var(--info)}
.badge-teal     {background:rgba(30,122,110,.12);color:var(--teal)}

/* ── Alerts ── */
.alert{
  padding:12px 16px;border-radius:var(--radius-sm);
  font-size:13.5px;margin-bottom:16px;
  display:flex;align-items:flex-start;gap:8px;
}
.alert-success {background:#ECFDF5;color:#065F46;border:1px solid #A7F3D0}
.alert-error   {background:#FEF2F2;color:#991B1B;border:1px solid #FECACA}
.alert-warning {background:#FFFBEB;color:#92400E;border:1px solid #FDE68A}
.alert-info    {background:#EFF6FF;color:#1E40AF;border:1px solid #BFDBFE}

/* ── Page Header ── */
.page-header{
  display:flex;align-items:center;justify-content:space-between;
  margin-bottom:24px;flex-wrap:wrap;gap:12px;
}
.page-header h1{font-size:22px;font-weight:800;color:var(--navy);margin:0}
.page-header-sub{font-size:13px;color:var(--text-light);margin-top:3px}
.breadcrumb{display:flex;align-items:center;gap:6px;font-size:12px;color:var(--text-light);margin-bottom:6px;flex-wrap:wrap}
.breadcrumb a{color:var(--navy-mid)}
.breadcrumb .sep{color:var(--warm-grey)}

/* Page header actions — stack buttons on small screens */
.page-header-actions{display:flex;align-items:center;gap:8px;flex-wrap:wrap}

/* ── Empty State ── */
.empty-state{padding:60px 24px;text-align:center;color:var(--text-light)}
.empty-icon{font-size:40px;margin-bottom:16px;opacity:.4}
.empty-state h3{font-size:17px;color:var(--navy);margin-bottom:8px}
.empty-state p{font-size:13.5px;margin-bottom:20px}

/* ── Pagination ── */
.pagination{display:flex;align-items:center;gap:10px;padding:16px 22px;border-top:1px solid var(--border);flex-wrap:wrap}
.page-info{font-size:13px;color:var(--text-light)}

/* ── Auth Pages ── */
.auth-body{background:var(--navy);min-height:100vh;display:flex;align-items:center;justify-content:center;padding:16px}
.auth-card{
  background:#fff;border-radius:var(--radius-lg);
  box-shadow:var(--shadow-lg);width:100%;max-width:440px;overflow:hidden;
}
.auth-card-header{padding:28px 28px 16px;text-align:center;border-bottom:1px solid var(--border)}
.auth-logo{margin-bottom:12px}
.auth-logo svg,.auth-logo img{width:56px;height:56px}
.auth-tagline{font-size:13px;color:var(--text-light);margin:0}
.auth-card-body{padding:24px 28px}
.auth-card-footer{padding:16px 28px;text-align:center;background:var(--off-white);font-size:13px;color:var(--text-light)}
.auth-card-footer a{color:var(--navy-mid);font-weight:600}
.auth-heading{font-size:20px;font-weight:800;color:var(--navy);margin-bottom:4px}
.auth-sub{font-size:13px;color:var(--text-light);margin-bottom:20px}
.auth-divider{display:flex;align-items:center;gap:12px;margin:18px 0;color:var(--mid-grey);font-size:12px}
.auth-divider::before,.auth-divider::after{content:'';flex:1;height:1px;background:var(--border)}

/* ── Landing Page ── */
.landing-body{background:var(--navy);margin:0;min-height:100vh;overflow-x:hidden}
.landing-nav{
  display:flex;align-items:center;justify-content:space-between;
  padding:14px 40px;background:rgba(15,29,47,.7);
  position:sticky;top:0;z-index:50;backdrop-filter:blur(8px);-webkit-backdrop-filter:blur(8px);
  border-bottom:1px solid rgba(255,255,255,.07);
}
.landing-logo{
  display:flex;align-items:center;gap:10px;
  color:#F6F5F2;font-size:17px;font-weight:800;letter-spacing:-.3px;
  text-decoration:none;
}
.landing-nav-links{display:flex;align-items:center;gap:20px}
.landing-nav-links a{color:rgba(246,245,242,.65);font-size:14px;text-decoration:none}
.landing-nav-links a:hover{color:#F6F5F2}
/* Mobile hamburger for landing page */
.landing-menu-btn{
  display:none;background:none;border:none;cursor:pointer;
  padding:6px;color:#F6F5F2;flex-direction:column;gap:4px;
}
.landing-menu-btn span{display:block;width:22px;height:2px;background:#F6F5F2;border-radius:2px}
.landing-mobile-menu{
  display:none;position:fixed;top:0;right:0;bottom:0;width:260px;
  background:var(--navy-dark);z-index:1000;padding:24px 20px;
  box-shadow:-8px 0 24px rgba(0,0,0,.4);
  flex-direction:column;gap:4px;overflow-y:auto;
}
.landing-mobile-menu.open{display:flex}
.landing-mobile-menu a{color:#F6F5F2;font-size:15px;padding:12px 8px;border-bottom:1px solid rgba(255,255,255,.07);text-decoration:none}
.landing-mobile-menu-close{color:rgba(255,255,255,.5);font-size:22px;cursor:pointer;align-self:flex-end;background:none;border:none;margin-bottom:16px}
.hero{padding:100px 40px 80px;text-align:center;max-width:860px;margin:0 auto;color:#F6F5F2}
.hero h1{font-size:52px;font-weight:900;line-height:1.1;letter-spacing:-1.5px;margin-bottom:22px;color:#fff}
.hero p{font-size:18px;color:rgba(246,245,242,.72);line-height:1.7;margin-bottom:36px;max-width:620px;margin-left:auto;margin-right:auto}
.hero-btns{display:flex;gap:14px;justify-content:center;flex-wrap:wrap}
.btn-white{background:#fff;color:var(--navy);border-color:#fff}
.btn-white:hover{background:rgba(255,255,255,.9);color:var(--navy)}
.btn-outline{background:transparent;color:#F6F5F2;border-color:rgba(246,245,242,.4)}
.btn-outline:hover{background:rgba(255,255,255,.08);color:#fff}
.features-section{padding:80px 40px;background:#F6F5F2}
.features-section h2{text-align:center;font-size:34px;font-weight:800;color:var(--navy);margin-bottom:10px}
.features-section .sub{text-align:center;color:var(--text-light);font-size:16px;margin-bottom:50px}
.features-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(260px,1fr));gap:24px;max-width:1100px;margin:0 auto}
.feature-card{background:#fff;padding:24px;border-radius:var(--radius);box-shadow:var(--shadow-sm);border:1px solid var(--border)}
.feature-card .feature-icon{font-size:28px;margin-bottom:12px}
.feature-card h3{font-size:15px;font-weight:700;color:var(--navy);margin-bottom:8px}
.feature-card p{font-size:13.5px;color:var(--text-light);line-height:1.6}
.pricing-section{padding:80px 40px;background:var(--navy)}
.pricing-section h2{text-align:center;font-size:34px;font-weight:800;color:#fff;margin-bottom:10px}
.pricing-section .sub{text-align:center;color:rgba(246,245,242,.6);font-size:16px;margin-bottom:50px}
.pricing-grid{display:grid;grid-template-columns:repeat(auto-fill,minmax(240px,1fr));gap:20px;max-width:900px;margin:0 auto}
.pricing-card{background:#fff;border-radius:var(--radius-lg);padding:28px;position:relative}
.pricing-card.popular{border:2px solid var(--teal);transform:scale(1.02)}
.pricing-popular-badge{position:absolute;top:-12px;left:50%;transform:translateX(-50%);background:var(--teal);color:#fff;font-size:11px;font-weight:700;padding:3px 14px;border-radius:20px;white-space:nowrap}
.pricing-plan-name{font-size:16px;font-weight:700;color:var(--navy);margin-bottom:6px}
.pricing-price{font-size:36px;font-weight:900;color:var(--navy)}
.pricing-price span{font-size:16px;font-weight:400;color:var(--text-light)}
.pricing-period{font-size:12px;color:var(--text-light);margin-bottom:20px}
.pricing-features{list-style:none;margin-bottom:24px}
.pricing-features li{padding:6px 0;font-size:13.5px;color:var(--text-mid);border-bottom:1px solid var(--border)}
.pricing-features li:last-child{border:none}
.pricing-features li.disabled{color:var(--warm-grey);text-decoration:line-through}
.pricing-features li::before{content:'✓ ';color:var(--teal);font-weight:700}
.pricing-features li.disabled::before{content:'✗ ';color:var(--warm-grey)}
.cta-section{padding:80px 40px;text-align:center;background:linear-gradient(135deg,#1E7A6E,#182D46)}
.cta-section h2{font-size:34px;font-weight:800;color:#fff;margin-bottom:12px}
.cta-section p{font-size:17px;color:rgba(255,255,255,.72);margin-bottom:28px}
.landing-footer{padding:24px 40px;text-align:center;font-size:13px;color:rgba(246,245,242,.4);border-top:1px solid rgba(255,255,255,.07)}
.landing-footer a{color:rgba(246,245,242,.6)}

/* ── Fault Tree Builder ── */
.ft-builder-wrap{display:flex;height:calc(100vh - var(--topbar-h) - 40px);gap:0;border-radius:var(--radius);overflow:hidden;box-shadow:var(--shadow-md);border:1px solid var(--border)}
.ft-sidebar{width:280px;background:#fff;border-right:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0;overflow-y:auto;-webkit-overflow-scrolling:touch}
.ft-sidebar-section{padding:12px 16px;border-bottom:1px solid var(--border)}
.ft-sidebar-section h4{font-size:11px;font-weight:700;color:var(--text-light);text-transform:uppercase;letter-spacing:.8px;margin-bottom:8px}
.ft-canvas-wrap{flex:1;background:#F8F9FA;position:relative;overflow:hidden}
.ft-canvas{width:100%;height:100%;cursor:grab;touch-action:none}
.ft-canvas:active{cursor:grabbing}
.ft-toolbar{
  position:absolute;top:12px;left:50%;transform:translateX(-50%);
  display:flex;align-items:center;gap:6px;
  background:#fff;padding:6px 10px;border-radius:30px;
  box-shadow:var(--shadow-md);border:1px solid var(--border);
  z-index:10;overflow-x:auto;max-width:calc(100% - 24px);
  -webkit-overflow-scrolling:touch;
}
.ft-toolbar-btn{
  width:36px;height:36px;border:none;background:none;cursor:pointer;
  border-radius:6px;display:flex;align-items:center;justify-content:center;
  color:var(--slate);font-size:16px;transition:all var(--transition);
  flex-shrink:0;-webkit-tap-highlight-color:transparent;
}
.ft-toolbar-btn:hover{background:var(--off-white);color:var(--navy)}
.ft-toolbar-btn.active{background:var(--navy);color:#fff}
.ft-toolbar-sep{width:1px;height:20px;background:var(--border);margin:0 2px;flex-shrink:0}
.ft-props-panel{width:300px;background:#fff;border-left:1px solid var(--border);display:flex;flex-direction:column;flex-shrink:0;overflow-y:auto;-webkit-overflow-scrolling:touch}
.ft-props-header{padding:14px 16px;border-bottom:1px solid var(--border);display:flex;align-items:center;justify-content:space-between}
.ft-props-header h4{font-size:13px;font-weight:700;color:var(--navy);margin:0}
/* Mobile panel switcher tabs (hidden on desktop) */
.ft-mobile-tabs{display:none;border-bottom:2px solid var(--border);background:#fff}
.ft-mobile-tab{flex:1;padding:10px;font-size:12px;font-weight:600;color:var(--text-light);background:none;border:none;cursor:pointer;border-bottom:2px solid transparent;margin-bottom:-2px}
.ft-mobile-tab.active{color:var(--teal);border-bottom-color:var(--teal)}

/* ── Gate / Event Palette Items ── */
.palette-item{
  display:flex;align-items:center;gap:10px;
  padding:10px 10px;border-radius:var(--radius-sm);
  cursor:grab;border:1px solid var(--border);margin-bottom:6px;
  background:#fff;transition:all var(--transition);user-select:none;
  -webkit-tap-highlight-color:transparent;
  touch-action:manipulation;
}
.palette-item:hover{border-color:var(--navy);box-shadow:var(--shadow-sm)}
.palette-icon{width:32px;height:32px;flex-shrink:0;display:flex;align-items:center;justify-content:center}
.palette-item span{font-size:12.5px;font-weight:500;color:var(--text-mid)}

/* ── SVG Tree Nodes ── */
.ft-node{cursor:pointer;transition:opacity .15s}
.ft-node:hover .node-body{filter:drop-shadow(0 4px 8px rgba(24,45,70,.25))}
.ft-node.selected .node-body{stroke-width:3;stroke:var(--teal)}
.ft-node-label{font-family:'Inter',sans-serif;font-size:11px;fill:var(--text-dark);font-weight:500;text-anchor:middle}
.ft-node-id{font-family:'Inter',sans-serif;font-size:9px;fill:var(--text-light);text-anchor:middle}
.ft-edge{stroke:var(--slate);stroke-width:1.5;fill:none;marker-end:url(#arrowhead)}

/* ── Calc Result Panels ── */
.calc-result-box{
  background:linear-gradient(135deg,var(--navy),#1E4F7A);
  color:#fff;border-radius:var(--radius);padding:24px 28px;margin-bottom:20px;
}
.calc-result-box .prob-label{font-size:13px;opacity:.75;margin-bottom:6px}
.calc-result-box .prob-value{font-size:32px;font-weight:900;letter-spacing:-1px}
.calc-result-box .prob-sci{font-size:16px;opacity:.8}
.mcs-table .mcs-row{display:flex;align-items:center;padding:10px 16px;border-bottom:1px solid var(--border)}
.mcs-table .mcs-row:last-child{border:none}
.mcs-rank{width:40px;font-weight:700;color:var(--navy)}
.mcs-events{flex:1;font-size:13px;color:var(--text-mid)}
.mcs-prob{font-size:12px;color:var(--text-light);font-family:monospace}
.mcs-order{width:60px;text-align:center}
.importance-bar{height:8px;border-radius:4px;background:var(--off-white);overflow:hidden;margin-top:4px}
.importance-fill{height:100%;background:var(--teal);border-radius:4px}

/* ── Probability Input Group ── */
.prob-input-group{display:flex;gap:8px;align-items:center}
.prob-input-group .form-control{flex:1}
.prob-input-group .prob-unit{font-size:12px;color:var(--text-light);white-space:nowrap}

/* ── Utility ── */
.text-center{text-align:center}
.text-right{text-align:right}
.flex{display:flex}
.items-center{align-items:center}
.justify-between{justify-content:space-between}
.gap-8{gap:8px}
.gap-12{gap:12px}
.gap-16{gap:16px}
.mt-8{margin-top:8px}
.mt-16{margin-top:16px}
.mt-24{margin-top:24px}
.mb-8{margin-bottom:8px}
.mb-16{margin-bottom:16px}
.mb-24{margin-bottom:24px}
.w-full{width:100%}
.p-0{padding:0}
hr.divider{border:none;border-top:1px solid var(--border);margin:20px 0}
.mono{font-family:'Courier New',monospace;font-size:13px}
.highlight{background:rgba(30,122,110,.08);border-left:3px solid var(--teal);padding:12px 16px;border-radius:4px;font-size:13.5px;line-height:1.6}
.formula-box{background:var(--navy);color:#F6F5F2;border-radius:var(--radius-sm);padding:14px 18px;font-family:'Courier New',monospace;font-size:13px;line-height:1.8;overflow-x:auto}

/* ── Dark Mode Toggle ── */
body.dark-mode{
  --off-white:#1a1f2e;--white:#232836;--border:#2e3549;
  --text-dark:#e8eaf0;--text-mid:#a0a8bc;--text-light:#636c84;
  background:#1a1f2e;
}
body.dark-mode .card,body.dark-mode .topbar,body.dark-mode .user-dropdown{background:#232836}
body.dark-mode .data-table th{background:#1a1f2e}

/* ── Tabs ── */
.tabs{display:flex;border-bottom:2px solid var(--border);margin-bottom:24px;gap:0;overflow-x:auto;-webkit-overflow-scrolling:touch;flex-wrap:nowrap;scroll-behavior:smooth}
.tab-btn{
  padding:10px 20px;font-size:13.5px;font-weight:600;color:var(--text-light);
  background:none;border:none;cursor:pointer;
  border-bottom:2px solid transparent;margin-bottom:-2px;
  transition:all var(--transition);white-space:nowrap;
  -webkit-tap-highlight-color:transparent;flex-shrink:0;
}
.tab-btn:hover{color:var(--navy)}
.tab-btn.active{color:var(--teal);border-bottom-color:var(--teal)}
.tab-panel{display:none}
.tab-panel.active{display:block}

/* ── Progress Bar ── */
.progress{height:8px;background:var(--off-white);border-radius:4px;overflow:hidden}
.progress-bar{height:100%;background:var(--teal);border-radius:4px;transition:width .3s ease}

/* ── Tooltip ── */
[data-tip]{position:relative;cursor:help}
[data-tip]::after{
  content:attr(data-tip);position:absolute;bottom:calc(100% + 6px);left:50%;transform:translateX(-50%);
  background:var(--navy);color:#fff;font-size:11px;padding:5px 10px;border-radius:5px;
  white-space:nowrap;pointer-events:none;opacity:0;transition:opacity .15s;z-index:1000;
}
[data-tip]:hover::after{opacity:1}

/* ── Mobile bottom notification toast ── */
.toast-notify{
  position:fixed;bottom:20px;left:50%;transform:translateX(-50%);
  padding:12px 22px;border-radius:10px;font-weight:600;font-size:14px;
  z-index:9999;box-shadow:0 4px 20px rgba(0,0,0,.3);
  white-space:nowrap;max-width:calc(100vw - 32px);text-align:center;
}

/* ── Responsive: Tablet (≤900px) ── */
@media (max-width: 900px) {
  :root{--sidebar-w:0px}
  .sidebar{transform:translateX(-100%);width:280px;z-index:300}
  .sidebar.open{transform:translateX(0);box-shadow:8px 0 32px rgba(0,0,0,.4)}
  .main-wrapper{margin-left:0}
  .sidebar-toggle{display:flex}
  .sidebar-overlay.open{display:block}
  .content{padding:20px 16px}
  .topbar{padding:0 16px;gap:10px}

  /* Hide AI assist button text, keep icon */
  .topbar-ai-btn .btn-text{display:none}

  /* All layout grids collapse to single column */
  .page-aside-grid,
  .page-aside-wide,
  .page-aside-right,
  .page-aside-right-sm,
  .page-main-side,
  .page-2col-grid,
  .page-3col-grid{grid-template-columns:1fr}
  .form-row,.form-row-3{grid-template-columns:1fr}

  /* Hero */
  .hero h1{font-size:34px;letter-spacing:-0.5px}
  .hero p{font-size:16px}
  .hero{padding:60px 20px 50px}
  .landing-nav{padding:12px 20px}
  .landing-nav-links{display:none}
  .landing-menu-btn{display:flex}
  .features-section,.pricing-section,.cta-section{padding:50px 20px}

  /* Fault tree builder panels */
  .ft-builder-wrap,.ft-container{
    flex-direction:column !important;
    height:auto !important;
    min-height:calc(100vh - var(--topbar-h));
  }
  .ft-mobile-tabs{display:flex}
  .ft-sidebar{
    width:100% !important;max-height:220px;height:220px;
    border-right:none;border-bottom:1px solid var(--border);
    display:none;
    order:2;
  }
  .ft-sidebar.mobile-active{display:flex}
  .ft-canvas-wrap{height:55vh !important;min-height:300px;flex:none !important;order:3}
  .ft-props-panel{
    width:100% !important;
    border-left:none;border-top:1px solid var(--border);
    display:none;max-height:320px;
    order:4;
  }
  .ft-props-panel.mobile-active{display:flex}
  .ft-mobile-tabs{order:1}

  /* Calc result smaller on tablet */
  .calc-result-box .prob-value{font-size:24px}

  /* Stats */
  .stats-grid{grid-template-columns:1fr 1fr}
}

/* ── Responsive: Mobile (≤600px) ── */
@media (max-width: 600px) {
  html{font-size:14px}
  .content{padding:16px 12px}
  .topbar{padding:0 12px;gap:8px}

  /* Hide page title from topbar (redundant with page-header h1) */
  .topbar-title{display:none}

  /* User dropdown becomes full-width */
  .user-dropdown{position:fixed;top:auto;bottom:0;left:0;right:0;border-radius:var(--radius-lg) var(--radius-lg) 0 0;min-width:unset;padding-bottom:env(safe-area-inset-bottom,0)}

  /* Stats single column */
  .stats-grid{grid-template-columns:1fr}
  .stat-card{padding:14px 16px;gap:12px}
  .stat-number{font-size:22px}

  /* Cards */
  .card-body{padding:16px}
  .card-header{padding:14px 16px}
  .card-footer{padding:12px 16px}

  /* Page header stack */
  .page-header{flex-direction:column;align-items:flex-start;gap:10px}
  .page-header h1{font-size:18px}
  .page-header > .btn, .page-header > a{width:100%;justify-content:center}

  /* Tables: allow horizontal scroll, tighter cells */
  .data-table th,.data-table td{padding:8px 12px}

  /* Auth cards */
  .auth-card-body{padding:20px 18px}
  .auth-card-header{padding:20px 18px 14px}
  .auth-card-footer{padding:14px 18px}

  /* Landing */
  .hero h1{font-size:26px}
  .hero p{font-size:14px}
  .hero{padding:50px 16px 40px}
  .hero-btns{flex-direction:column;align-items:center}
  .hero-btns .btn{width:100%;max-width:280px}
  .landing-footer{padding:20px 16px}
  .features-section h2,.pricing-section h2,.cta-section h2{font-size:24px}

  /* Fault tree toolbar wraps/scrolls */
  .ft-toolbar{gap:3px;padding:4px 8px}
  .ft-toolbar-btn{width:30px;height:30px;font-size:14px}
  .ft-canvas-wrap{height:50vh}

  /* Calc result */
  .calc-result-box{padding:18px 20px}
  .calc-result-box .prob-value{font-size:20px}

  /* Modals — full-screen bottom sheet */
  [id$="Modal"] > div,
  .modal-inner{
    border-radius:var(--radius-lg) var(--radius-lg) 0 0 !important;
    position:fixed !important;bottom:0 !important;left:0 !important;right:0 !important;
    top:auto !important;width:100% !important;max-width:100% !important;
    max-height:92vh;overflow-y:auto;-webkit-overflow-scrolling:touch;
  }

  /* Tab buttons smaller */
  .tab-btn{padding:8px 14px;font-size:12.5px}

  /* Topbar */
  .user-name-top{display:none}
  .topbar-right .btn-sm:not(.always-show){display:none}

  /* Form controls */
  .form-row{grid-template-columns:1fr}

  /* Calc popup in fault tree builder */
  #calcPopup{
    left:10px !important;right:10px !important;
    bottom:10px !important;min-width:unset !important;
    width:auto !important;
  }
  /* AI modal → bottom sheet */
  #aiFtModal > div{
    border-radius:var(--radius-lg) var(--radius-lg) 0 0 !important;
    position:fixed !important;bottom:0 !important;left:0 !important;right:0 !important;
    top:auto !important;width:100% !important;max-width:100% !important;
    max-height:92vh;overflow-y:auto;-webkit-overflow-scrolling:touch;
  }
  /* Payment modal → bottom sheet */
  #paymentModal > div{
    border-radius:var(--radius-lg) var(--radius-lg) 0 0 !important;
    position:fixed !important;bottom:0 !important;left:0 !important;right:0 !important;
    top:auto !important;width:100% !important;max-width:100% !important;
    max-height:92vh;overflow-y:auto;-webkit-overflow-scrolling:touch;
  }
  /* Filter bars stack vertically */
  .filter-bar{flex-direction:column}
  .filter-bar .form-control,.filter-bar select,.filter-bar .btn{width:100%}
  /* Selects inside card header actions */
  .card-header select.form-control{width:auto;max-width:160px}
  /* Action button rows in tables */
  .actions{justify-content:flex-start}
}

/* ── Responsive: Small phones (≤400px) ── */
@media (max-width: 400px) {
  .content{padding:12px 10px}
  .topbar{padding:0 10px}
  .badge{font-size:10px;padding:1px 7px}
  .btn-sm{padding:4px 10px;font-size:11px}
  .stat-card{flex-direction:column;text-align:center;gap:8px;padding:14px}
  .stat-icon{width:36px;height:36px;font-size:16px}
  .page-header h1{font-size:16px}
}

/* ── Filter / action toolbars (all screen sizes) ── */
.filter-bar{display:flex;gap:8px;flex-wrap:wrap;align-items:center;margin-bottom:16px}
.filter-bar .form-control{flex:1;min-width:160px}

/* ── Safe area insets (iPhone notch/home indicator) ── */
.sidebar{padding-top:env(safe-area-inset-top,0);padding-left:env(safe-area-inset-left,0)}
.topbar{padding-top:env(safe-area-inset-top,0)}
body{padding-bottom:env(safe-area-inset-bottom,0)}

/* ── Print: always full-width ── */
@media print{
  .sidebar,.topbar,.sidebar-overlay{display:none !important}
  .main-wrapper{margin-left:0 !important}
  .content{padding:0 !important}
}