/* =========================================================
   WhatsApp Campaign Manager — Premium SaaS Dark Theme
   ========================================================= */

:root {
  /* Premium Dark Palette */
  --bg-base:      #0B1120;
  --bg-surface:   #131B2C;
  --bg-surface-2: #1E293B;
  
  --ink:          #F8FAFC;
  --ink-soft:     #94A3B8;
  --muted:        #64748B;
  
  --line:         #1E293B;
  --line-2:       #334155;
  
  /* Accents */
  --primary:      #10B981;
  --primary-d:    #059669;
  --primary-l:    #34D399;
  --primary-bg:   rgba(16, 185, 129, 0.1);
  
  --danger:       #EF4444;
  --danger-bg:    rgba(239, 68, 68, 0.1);
  --warning:      #F59E0B;
  --info:         #3B82F6;

  /* Effects */
  --shadow-sm:    0 1px 2px 0 rgba(0, 0, 0, 0.4);
  --shadow:       0 4px 6px -1px rgba(0, 0, 0, 0.3), 0 2px 4px -1px rgba(0, 0, 0, 0.2);
  --shadow-lg:    0 10px 25px -3px rgba(0, 0, 0, 0.5), 0 4px 10px -2px rgba(0, 0, 0, 0.3);
  --shadow-glow:  0 0 20px rgba(16, 185, 129, 0.15);
  
  --radius-sm:    8px;
  --radius:       12px;
  --radius-lg:    20px;
  
  /* Fonts */
  --font-sans:    'Inter', system-ui, -apple-system, sans-serif;
  --font-display: 'Outfit', var(--font-sans);
}

* { box-sizing: border-box; margin: 0; padding: 0; }

body {
  font-family: var(--font-sans);
  color: var(--ink);
  background-color: var(--bg-base);
  /* Modern soft radial glow background */
  background-image: 
    radial-gradient(circle at 15% 0%, rgba(16, 185, 129, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 85% 100%, rgba(59, 130, 246, 0.04) 0%, transparent 40%);
  background-attachment: fixed;
  min-height: 100vh;
  -webkit-font-smoothing: antialiased;
  line-height: 1.5;
}

/* ---------- Typography ---------- */
h1, h2, h3, h4, .stat span, .brand-text h1 {
  font-family: var(--font-display);
  font-weight: 700;
  letter-spacing: -0.02em;
}

/* ---------- Icons ---------- */
.ic { 
  width: 18px; height: 18px; vertical-align: -4px; 
  stroke: currentColor; fill: none;
  stroke-width: 2; stroke-linecap: round; stroke-linejoin: round; 
  display: inline-block; 
}
button .ic { pointer-events: none; }

/* ---------- Header ---------- */
header {
  position: sticky; top: 0; z-index: 50;
  display: flex; justify-content: space-between; align-items: center; gap: 16px;
  padding: 14px clamp(16px, 4vw, 40px);
  background: rgba(19, 27, 44, 0.85);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--line);
  box-shadow: 0 4px 30px rgba(0,0,0,0.4);
}
.brand { display: flex; align-items: center; gap: 14px; }
.brand-logo {
  width: 44px; height: 44px; border-radius: 12px;
  background: linear-gradient(135deg, var(--primary-l), var(--primary)); 
  display: grid; place-items: center;
  flex-shrink: 0; 
  box-shadow: 0 4px 14px rgba(16, 185, 129, 0.3);
  transform: rotate(-3deg);
}
.brand-logo svg { width: 26px; height: 26px; color: #fff; }
.brand-text h1 { font-size: 20px; line-height: 1.1; color: var(--ink); }
.brand-text p { font-size: 13px; color: var(--ink-soft); font-weight: 400; margin-top: 2px; }

.wa-status { display: flex; align-items: center; gap: 12px; flex-wrap: wrap; }
.status-pill {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(0,0,0,0.3); border: 1px solid var(--line);
  padding: 6px 14px; border-radius: 999px;
  font-size: 13px; font-weight: 500; color: var(--ink-soft);
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.2);
}
.dot { width: 8px; height: 8px; border-radius: 50%; display: inline-block; position: relative; }
.dot.off { background: var(--danger); box-shadow: 0 0 8px var(--danger); }
.dot.on  { background: var(--primary); box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.7); animation: pulse 2s infinite; }
@keyframes pulse {
  0%   { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0.6); }
  70%  { box-shadow: 0 0 0 6px rgba(16, 185, 129, 0); }
  100% { box-shadow: 0 0 0 0 rgba(16, 185, 129, 0); }
}

/* ---------- Layout ---------- */
main {
  display: grid; grid-template-columns: 1.1fr 0.9fr;
  gap: clamp(20px, 3vw, 32px);
  padding: clamp(20px, 4vw, 40px);
  max-width: 1400px; margin: 0 auto;
  align-items: start;
}
.col { display: flex; flex-direction: column; gap: clamp(20px, 3vw, 28px); }
.sticky-col { position: sticky; top: 100px; }

/* ---------- Cards ---------- */
.card {
  background: var(--bg-surface);
  border: 1px solid var(--line);
  border-radius: var(--radius-lg);
  padding: clamp(20px, 3vw, 32px);
  box-shadow: var(--shadow);
  transition: box-shadow 0.3s ease, border-color 0.3s ease;
}
.card:hover { 
  box-shadow: var(--shadow-lg), var(--shadow-glow); 
  border-color: var(--line-2);
}
.card h2 {
  display: flex; align-items: center; gap: 12px;
  font-size: 18px; color: var(--ink);
}
.card h3 { font-size: 14px; font-weight: 600; margin: 16px 0 10px; color: var(--ink-soft); }
.badge {
  width: 28px; height: 28px; border-radius: 8px; flex-shrink: 0;
  background: linear-gradient(135deg, var(--primary-l), var(--primary-d));
  color: #fff; font-size: 14px; font-family: var(--font-display);
  display: grid; place-items: center;
  box-shadow: 0 4px 10px rgba(16, 185, 129, 0.3);
}
.hint { font-size: 13px; color: var(--muted); margin: 6px 0 16px; line-height: 1.5; }
code {
  background: var(--bg-surface-2); color: var(--primary-l); font-weight: 500;
  padding: 2px 6px; border-radius: 6px; font-size: 12.5px;
  border: 1px solid var(--line);
}

/* ---------- Form controls ---------- */
label { display: block; font-size: 13px; font-weight: 500; color: var(--ink-soft); margin-bottom: 16px; }
input, select, textarea {
  width: 100%; padding: 12px 16px; margin-top: 6px;
  background: var(--bg-base); border: 1px solid var(--line); border-radius: var(--radius);
  color: var(--ink); font-size: 14px; font-family: inherit; font-weight: 400;
  transition: all 0.2s;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.1);
}
select option { background: var(--bg-surface); color: var(--ink); }
input::placeholder, textarea::placeholder { color: var(--muted); }
input:focus, select:focus, textarea:focus {
  outline: none; border-color: var(--primary); background: var(--bg-surface);
  box-shadow: 0 0 0 3px rgba(16, 185, 129, 0.15);
}
textarea { resize: vertical; line-height: 1.6; min-height: 100px; }
input[type="file"] {
  padding: 24px; border: 1.5px dashed var(--line-2); cursor: pointer; text-align: center;
  background: rgba(0,0,0,0.2); color: var(--ink-soft); box-shadow: none;
}
input[type="file"]:hover { border-color: var(--primary); background: var(--primary-bg); }
input[type="file"]::file-selector-button {
  margin-right: 16px; padding: 8px 16px; border: none; border-radius: var(--radius-sm);
  background: var(--primary); color: #fff; font-weight: 600; cursor: pointer;
  transition: 0.2s;
}
input[type="file"]::file-selector-button:hover { background: var(--primary-l); }
.grid2 { display: grid; grid-template-columns: 1fr 1fr; gap: 16px; }
.row { display: flex; gap: 12px; margin-top: 8px; flex-wrap: wrap; }

/* ---------- Buttons ---------- */
.btn {
  display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  padding: 12px 20px; border: none; border-radius: var(--radius);
  background: var(--bg-surface-2); color: var(--ink); cursor: pointer;
  font-size: 14px; font-weight: 600; font-family: inherit;
  transition: all 0.2s ease;
  border: 1px solid var(--line);
}
.btn:hover { 
  transform: translateY(-2px); 
  background: var(--line-2);
  box-shadow: var(--shadow);
}
.btn:active { transform: translateY(0); }
.btn.primary {
  background: linear-gradient(135deg, var(--primary-l), var(--primary-d));
  color: #fff; border: none;
  box-shadow: 0 6px 16px rgba(16, 185, 129, 0.25);
  text-shadow: 0 1px 2px rgba(0,0,0,0.2);
}
.btn.primary:hover { box-shadow: 0 8px 24px rgba(16, 185, 129, 0.4); filter: brightness(1.1); }
.btn.light { 
  background: var(--ink); color: var(--bg-base); border: none;
}
.btn.light:hover { background: #fff; box-shadow: 0 4px 14px rgba(255,255,255,0.2); }
.btn.danger { 
  background: var(--danger); color: #fff; border: none;
  box-shadow: 0 6px 16px rgba(239, 68, 68, 0.2); 
}
.btn.danger:hover { background: #DC2626; box-shadow: 0 8px 24px rgba(239, 68, 68, 0.35); }
.btn.ghost { background: transparent; border: 1px solid var(--line-2); color: var(--ink-soft); }
.btn.ghost:hover { border-color: var(--primary); color: var(--primary); background: var(--primary-bg); }
.btn.small { padding: 8px 16px; font-size: 13px; border-radius: var(--radius-sm); }
.btn:disabled { opacity: 0.5; cursor: not-allowed; transform: none; box-shadow: none; pointer-events: none; }

.hidden { display: none !important; }

/* ---------- File info ---------- */
.file-info {
  font-size: 13.5px; padding: 14px 16px; margin: 16px 0 8px;
  background: var(--primary-bg); border: 1px solid rgba(16, 185, 129, 0.3); 
  border-radius: var(--radius);
  color: var(--primary-l); font-weight: 500;
}

/* ---------- Preview table ---------- */
.table-scroll { 
  overflow-x: auto; 
  border: 1px solid var(--line); 
  border-radius: var(--radius); 
  background: var(--bg-base);
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.1);
  /* Scroll shadow hints */
  background-image: linear-gradient(to right, var(--bg-base), var(--bg-base)), linear-gradient(to right, var(--bg-base), var(--bg-base)), linear-gradient(to right, rgba(0,0,0,0.2), rgba(255,255,255,0)), linear-gradient(to left, rgba(0,0,0,0.2), rgba(255,255,255,0));
  background-position: left center, right center, left center, right center;
  background-repeat: no-repeat;
  background-color: var(--bg-base);
  background-size: 20px 100%, 20px 100%, 10px 100%, 10px 100%;
  background-attachment: local, local, scroll, scroll;
}
table { border-collapse: collapse; width: 100%; font-size: 13px; }
th, td { padding: 12px 16px; border-bottom: 1px solid var(--line); text-align: left; white-space: nowrap; }
th { 
  background: var(--bg-surface-2); color: var(--ink-soft); font-weight: 600; 
  position: sticky; top: 0; font-family: var(--font-display); letter-spacing: 0.02em;
}
tr:last-child td { border-bottom: none; }
tbody tr:hover, table tr:hover { background: rgba(255,255,255,0.02); }

/* ---------- QR / connection box ---------- */
.qr-box {
  display: flex; align-items: center; justify-content: center; text-align: center;
  min-height: 250px; padding: 24px;
  background: var(--bg-base);
  border: 1px dashed var(--line-2); border-radius: var(--radius);
  position: relative; overflow: hidden;
}
.qr-box::before {
  content: ''; position: absolute; inset: 0;
  background: radial-gradient(circle at center, var(--primary-bg) 0%, transparent 70%);
  opacity: 0.5; pointer-events: none;
}
.qr-box img {
  width: 240px; height: 240px; background: #fff; padding: 12px;
  border-radius: 16px; box-shadow: var(--shadow-lg); border: 1px solid var(--line);
  position: relative; z-index: 2;
}
.qr-box .hint { margin: 0; max-width: 320px; position: relative; z-index: 2; }

/* ---------- Progress ---------- */
.progress-bar { 
  height: 10px; background: var(--bg-base); 
  border-radius: 999px; overflow: hidden; margin: 12px 0;
  box-shadow: inset 0 2px 4px rgba(0,0,0,0.2);
}
#progressFill {
  height: 100%; width: 0;
  background: linear-gradient(90deg, var(--primary), var(--primary-l));
  border-radius: 999px; transition: width 0.4s ease;
  box-shadow: 0 0 10px rgba(16, 185, 129, 0.4);
}
.stats { display: flex; gap: 16px; margin-top: 24px; }
.stat {
  flex: 1; text-align: center; padding: 16px 10px; border-radius: var(--radius);
  background: var(--bg-base); border: 1px solid var(--line);
  box-shadow: var(--shadow-sm); transition: transform 0.2s;
}
.stat:hover { transform: translateY(-2px); }
.stat span { font-size: 32px; font-weight: 700; display: block; line-height: 1; margin-bottom: 8px; }
.stat label { font-size: 12px; font-weight: 600; color: var(--muted); text-transform: uppercase; letter-spacing: 0.5px; }
.stat.success { background: linear-gradient(180deg, var(--bg-base) 0%, var(--primary-bg) 200%); border-color: rgba(16, 185, 129, 0.3); }
.stat.success span { color: var(--primary-l); }
.stat.fail span { color: var(--danger); }
.stat.total span { color: var(--info); }

/* ---------- Tabs + reports ---------- */
.tabs { display: flex; gap: 8px; margin-bottom: 16px; background: var(--bg-base); padding: 6px; border-radius: var(--radius); border: 1px solid var(--line); }
.tab {
  flex: 1; display: inline-flex; align-items: center; justify-content: center; gap: 8px;
  background: transparent; border: none; color: var(--ink-soft);
  padding: 10px 16px; border-radius: var(--radius-sm); cursor: pointer; font-size: 13.5px; font-weight: 600;
  transition: all 0.2s;
}
.tab:hover:not(.active) { color: var(--ink); background: rgba(255,255,255,0.03); }
.tab.active { background: var(--bg-surface-2); color: var(--ink); box-shadow: var(--shadow-sm); }
.report-list { max-height: 280px; overflow-y: auto; border-radius: var(--radius); border: 1px solid var(--line); background: var(--bg-base); }
.report-list:empty::after {
  content: 'No results yet.'; display: block; text-align: center;
  color: var(--muted); font-size: 13px; padding: 32px;
}
.report-item {
  padding: 14px 16px; border-bottom: 1px solid var(--line);
  display: flex; justify-content: space-between; gap: 12px; align-items: center;
  font-size: 13.5px;
}
.report-item:last-child { border-bottom: none; }
.report-item:hover { background: rgba(255,255,255,0.02); }
.report-item span:first-child { font-weight: 600; }
.report-item .reason { color: var(--danger); font-size: 12px; font-weight: 500; text-align: right; background: var(--danger-bg); padding: 4px 8px; border-radius: 4px; }

/* ---------- Live log ---------- */
.log-box {
  background: #020617; border-radius: var(--radius); padding: 16px;
  height: 280px; overflow-y: auto;
  font-family: 'JetBrains Mono', 'Fira Code', 'Consolas', monospace; font-size: 12px; line-height: 1.7;
  border: 1px solid var(--line);
  box-shadow: inset 0 4px 10px rgba(0,0,0,0.3);
}
.log-line { white-space: pre-wrap; color: var(--ink-soft); }
.log-line .t { color: var(--muted); }
.log-line.success { color: var(--primary-l); }
.log-line.error { color: var(--danger); }
.log-line.warn { color: var(--warning); }

/* ---------- Message sequence steps ---------- */
#sequence { margin-bottom: 20px; }
.step {
  background: var(--bg-base); border: 1px solid var(--line); border-left: 4px solid var(--primary);
  border-radius: var(--radius); padding: 20px; margin-bottom: 16px;
  transition: transform 0.2s, box-shadow 0.2s;
  box-shadow: var(--shadow-sm);
}
.step:hover { box-shadow: var(--shadow); transform: translateX(2px); }
.step-head { display: flex; justify-content: space-between; align-items: center; margin-bottom: 14px; }
.step-head strong { font-size: 14px; color: var(--primary-l); font-weight: 700; font-family: var(--font-display); }
.step .delay-row { display: flex; align-items: center; gap: 12px; font-size: 13.5px; color: var(--ink-soft); margin-bottom: 12px; font-weight: 500; }
.step .delay-row input { width: 90px; margin: 0; padding: 8px 12px; background: var(--bg-surface); }
.step .rm {
  background: var(--bg-surface); border: 1px solid var(--line-2); width: 30px; height: 30px;
  border-radius: 8px; color: var(--danger); cursor: pointer; font-size: 18px; line-height: 1;
  display: grid; place-items: center; transition: all 0.2s;
}
.step .rm:hover { background: var(--danger); color: #fff; border-color: var(--danger); transform: scale(1.05); }

/* scrollbars */
::-webkit-scrollbar { width: 8px; height: 8px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--line-2); border-radius: 999px; border: 2px solid var(--bg-surface); }
::-webkit-scrollbar-thumb:hover { background: var(--muted); }
.log-box::-webkit-scrollbar-thumb { border-color: #020617; }

/* =========================================================
   Responsive Design Breakpoints
   ========================================================= */

/* ---- Laptop/Tablet (≤ 1024px) ---- */
@media (max-width: 1024px) {
  main { grid-template-columns: 1fr; }
  .sticky-col { position: static; }
}

/* ---- Mobile (≤ 768px) ---- */
@media (max-width: 768px) {
  /* Header adjustments */
  header {
    flex-wrap: wrap;
    padding: 16px;
    gap: 16px;
  }
  .brand { width: 100%; justify-content: center; }
  .wa-status {
    width: 100%;
    justify-content: center;
  }
  
  /* Make buttons full width on small screens */
  .wa-status .btn { flex: 1; }
  .wa-status div { display: none; } /* hide separator */

  /* Cards */
  .card { padding: 20px; border-radius: 16px; }
  main { padding: 16px; gap: 16px; }
  .col { gap: 16px; }

  /* Form Elements */
  .grid2 { grid-template-columns: 1fr; gap: 12px; }
  input, select, textarea { font-size: 15px; padding: 14px 16px; } /* larger touch targets */
  .btn { padding: 14px 20px; font-size: 15px; width: 100%; } /* full width buttons */
  
  .row { flex-direction: column; gap: 10px; }
  .row .btn { width: 100%; }

  /* QR Box */
  .qr-box { padding: 20px; }
  .qr-box img { width: 200px; height: 200px; }

  /* Stats */
  .stats { gap: 10px; }
  .stat { padding: 14px 8px; }
  .stat span { font-size: 26px; }
  
  /* Tables */
  th, td { padding: 10px 12px; font-size: 13px; }
}

/* ---- Small Mobile (≤ 480px) ---- */
@media (max-width: 480px) {
  header { padding: 12px; }
  .brand-logo { width: 36px; height: 36px; border-radius: 10px; }
  .brand-logo svg { width: 20px; height: 20px; }
  .brand-text h1 { font-size: 18px; }
  
  .card { padding: 16px; }
  main { padding: 12px; }
  
  .stats { flex-direction: column; }
  .stat { padding: 16px; display: flex; align-items: center; justify-content: space-between; text-align: left; }
  .stat span { margin: 0; font-size: 24px; }
  
  .step { padding: 16px; }
  .step .delay-row { flex-direction: column; align-items: flex-start; }
  .step .delay-row input { width: 100%; }
}