/* ============================================================
   STACKD — main.css
   Global styles, CSS variables, typography, layout utilities
   ============================================================ */

/* ── GOOGLE FONTS ── */
@import url('https://fonts.googleapis.com/css2?family=Plus+Jakarta+Sans:wght@400;500;600;700;800&display=swap');

/* ── CSS VARIABLES ── */
:root {
  /* Brand */
  --accent:        #A855F7;
  --accent-2:      #EC4899;
  --accent-glow:   rgba(168, 85, 247, 0.35);
  --grad:          linear-gradient(135deg, #A855F7, #EC4899);
  --grad-subtle:   linear-gradient(135deg, rgba(168,85,247,0.12), rgba(236,72,153,0.08));

  /* Surfaces */
  --bg:            #0D0D0D;
  --surface:       #181818;
  --surface-2:     #222222;
  --surface-3:     #2A2A2A;

  /* Text */
  --text:          #FFFFFF;
  --text-muted:    #888888;
  --text-dim:      #555555;

  /* Borders */
  --border:        rgba(255, 255, 255, 0.08);
  --border-accent: rgba(168, 85, 247, 0.3);

  /* Status */
  --success:       #22C55E;
  --warning:       #F59E0B;
  --danger:        #EF4444;

  /* Sizing */
  --radius-sm:     8px;
  --radius:        12px;
  --radius-lg:     16px;
  --radius-xl:     22px;
  --radius-full:   100px;

  /* Typography */
  --font:          'Plus Jakarta Sans', system-ui, -apple-system, sans-serif;

  /* Transitions */
  --transition:    all 0.2s ease;
  --transition-bounce: all 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

/* ── RESET ── */
*, *::before, *::after {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
  -webkit-tap-highlight-color: transparent;
}

html {
  scroll-behavior: smooth;
  font-size: 16px;
}

body {
  font-family: var(--font);
  background: var(--bg);
  color: var(--text);
  min-height: 100vh;
  overflow-x: hidden;
  -webkit-font-smoothing: antialiased;
  -moz-osx-font-smoothing: grayscale;
}

img, svg { display: block; max-width: 100%; }
a { color: inherit; text-decoration: none; }
button { font-family: var(--font); }

/* ── TYPOGRAPHY ── */
h1 {
  font-size: clamp(2.4rem, 9vw, 3.6rem);
  font-weight: 800;
  letter-spacing: -2px;
  line-height: 1.05;
}

h2 {
  font-size: clamp(1.75rem, 5vw, 2.3rem);
  font-weight: 800;
  letter-spacing: -1px;
  line-height: 1.1;
}

h3 { font-size: 1rem; font-weight: 800; }
h4 { font-size: 0.88rem; font-weight: 700; }

p { line-height: 1.6; }

.text-muted   { color: var(--text-muted); }
.text-accent  { color: var(--accent); }
.text-success { color: var(--success); }
.text-danger  { color: var(--danger); }
.text-center  { text-align: center; }
.text-sm      { font-size: 0.82rem; }
.text-xs      { font-size: 0.72rem; }

.grad-text {
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* ── LAYOUT ── */
.container {
  width: 100%;
  max-width: 480px;
  margin: 0 auto;
  padding: 0 1.25rem;
}

.section { padding: 3.5rem 1.25rem; }

.divider {
  height: 1px;
  background: var(--border);
  margin: 0 1.25rem;
}

/* ── NAV ── */
.nav {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 200;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 0 1.25rem;
  height: 56px;
  background: rgba(13, 13, 13, 0.92);
  backdrop-filter: blur(20px);
  -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid var(--border);
}

.nav-logo {
  font-size: 1.3rem;
  font-weight: 800;
  letter-spacing: -0.5px;
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.nav-right {
  display: flex;
  align-items: center;
  gap: 0.5rem;
}

/* ── BUTTONS ── */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 0.4rem;
  font-family: var(--font);
  font-weight: 700;
  border: none;
  cursor: pointer;
  transition: var(--transition);
  text-decoration: none;
  white-space: nowrap;
  -webkit-appearance: none;
}

.btn:disabled {
  opacity: 0.5;
  cursor: not-allowed;
  pointer-events: none;
}

/* Sizes */
.btn-xs  { padding: 0.35rem 0.75rem; border-radius: var(--radius-full); font-size: 0.72rem; }
.btn-sm  { padding: 0.45rem 1rem;    border-radius: var(--radius-full); font-size: 0.82rem; }
.btn-md  { padding: 0.7rem 1.4rem;   border-radius: var(--radius-full); font-size: 0.9rem;  }
.btn-lg  { padding: 0.88rem 1.75rem; border-radius: var(--radius-full); font-size: 0.95rem; width: 100%; }

/* Variants */
.btn-grad {
  background: var(--grad);
  color: #fff;
  box-shadow: 0 4px 20px var(--accent-glow);
}
.btn-grad:hover {
  transform: translateY(-1px);
  box-shadow: 0 6px 28px rgba(168,85,247,0.5);
}
.btn-grad:active { transform: translateY(0); }

.btn-ghost {
  background: var(--surface-2);
  color: var(--text);
}
.btn-ghost:hover { background: var(--surface-3); }

.btn-outline {
  background: transparent;
  color: var(--text);
  border: 1.5px solid var(--border);
  border-radius: var(--radius-full);
}
.btn-outline:hover { border-color: var(--accent); color: var(--accent); }

.btn-danger {
  background: rgba(239,68,68,0.12);
  color: var(--danger);
  border: 1px solid rgba(239,68,68,0.2);
}
.btn-danger:hover { background: rgba(239,68,68,0.22); }

.btn-success {
  background: rgba(34,197,94,0.12);
  color: var(--success);
  border: 1px solid rgba(34,197,94,0.2);
}

/* ── CARDS ── */
.card {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
}

.card-sm {
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius-lg);
  padding: 1rem;
}

.card-accent {
  background: var(--grad-subtle);
  border: 1px solid var(--border-accent);
  border-radius: var(--radius-xl);
  padding: 1.5rem;
}

/* ── FORM ELEMENTS ── */
.field { margin-bottom: 1rem; }

.field label {
  display: block;
  font-size: 0.75rem;
  font-weight: 600;
  color: var(--text-muted);
  margin-bottom: 0.4rem;
  letter-spacing: 0.03em;
}

.field input,
.field textarea,
.field select {
  width: 100%;
  background: var(--surface-2);
  border: 1px solid var(--border);
  border-radius: var(--radius);
  padding: 0.72rem 0.95rem;
  color: var(--text);
  font-family: var(--font);
  font-size: 0.9rem;
  outline: none;
  transition: border-color 0.2s, box-shadow 0.2s;
  -webkit-appearance: none;
}

.field input:focus,
.field textarea:focus,
.field select:focus {
  border-color: var(--accent);
  box-shadow: 0 0 0 3px rgba(168,85,247,0.1);
}

.field textarea {
  resize: none;
  height: 72px;
  line-height: 1.5;
}

.field select {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='10' height='10' fill='%23888' viewBox='0 0 16 16'%3E%3Cpath d='M7.247 11.14 2.451 5.658C1.885 5.013 2.345 4 3.204 4h9.592a1 1 0 0 1 .753 1.659l-4.796 5.48a1 1 0 0 1-1.506 0z'/%3E%3C/svg%3E");
  background-repeat: no-repeat;
  background-position: right 0.9rem center;
  padding-right: 2.2rem;
  cursor: pointer;
}

.field select option { background: var(--surface-2); }

.field-row {
  display: flex;
  gap: 0.5rem;
}

.field-row .field { flex: 1; margin-bottom: 0; }

.field-hint {
  font-size: 0.72rem;
  color: var(--text-muted);
  margin-top: 0.3rem;
}

.field-error {
  font-size: 0.72rem;
  color: var(--danger);
  margin-top: 0.3rem;
}

/* ── BADGES ── */
.badge {
  display: inline-flex;
  align-items: center;
  gap: 0.3rem;
  padding: 0.25rem 0.7rem;
  border-radius: var(--radius-full);
  font-size: 0.72rem;
  font-weight: 700;
}

.badge-accent {
  background: rgba(168,85,247,0.12);
  border: 1px solid rgba(168,85,247,0.28);
  color: #C084FC;
}

.badge-success {
  background: rgba(34,197,94,0.1);
  border: 1px solid rgba(34,197,94,0.25);
  color: var(--success);
}

.badge-pro {
  background: var(--grad);
  color: #fff;
  font-size: 0.65rem;
  letter-spacing: 0.06em;
  text-transform: uppercase;
}

/* ── SECTION HEADERS ── */
.eyebrow {
  text-align: center;
  font-size: 0.7rem;
  font-weight: 700;
  letter-spacing: 0.12em;
  text-transform: uppercase;
  color: var(--accent);
  margin-bottom: 0.5rem;
}

.section-sub {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.9rem;
  line-height: 1.6;
  max-width: 290px;
  margin: 0.5rem auto 2.5rem;
}

/* ── TOAST ── */
#toast {
  position: fixed;
  bottom: calc(1.5rem + env(safe-area-inset-bottom));
  left: 50%;
  transform: translateX(-50%) translateY(80px);
  background: #fff;
  color: #000;
  font-family: var(--font);
  font-weight: 700;
  font-size: 0.85rem;
  padding: 0.72rem 1.4rem;
  border-radius: var(--radius-full);
  opacity: 0;
  transition: var(--transition-bounce);
  z-index: 9999;
  white-space: nowrap;
  box-shadow: 0 8px 32px rgba(0,0,0,0.4);
  pointer-events: none;
}

#toast.show {
  opacity: 1;
  transform: translateX(-50%) translateY(0);
}

#toast.toast-error {
  background: var(--danger);
  color: #fff;
}

#toast.toast-success {
  background: var(--success);
  color: #fff;
}

/* ── MODAL ── */
.modal-overlay {
  position: fixed;
  inset: 0;
  background: rgba(0,0,0,0.75);
  backdrop-filter: blur(8px);
  z-index: 500;
  display: flex;
  align-items: flex-end;
  justify-content: center;
  opacity: 0;
  pointer-events: none;
  transition: opacity 0.25s;
}

.modal-overlay.open {
  opacity: 1;
  pointer-events: all;
}

.modal {
  background: var(--surface);
  border: 1px solid var(--border);
  border-radius: var(--radius-xl) var(--radius-xl) 0 0;
  padding: 1.5rem 1.25rem calc(1.5rem + env(safe-area-inset-bottom));
  width: 100%;
  max-width: 480px;
  transform: translateY(100%);
  transition: transform 0.3s cubic-bezier(0.34, 1.56, 0.64, 1);
}

.modal-overlay.open .modal {
  transform: translateY(0);
}

.modal-handle {
  width: 36px;
  height: 4px;
  background: var(--border);
  border-radius: 2px;
  margin: 0 auto 1.5rem;
}

.modal-title {
  font-weight: 800;
  font-size: 1.1rem;
  margin-bottom: 1rem;
}

/* ── LOADING SPINNER ── */
.spinner {
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255,255,255,0.2);
  border-top-color: #fff;
  border-radius: 50%;
  animation: spin 0.7s linear infinite;
  display: inline-block;
}

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

/* ── LIVE INDICATOR ── */
.live-dot {
  display: inline-flex;
  align-items: center;
  gap: 5px;
  font-size: 0.68rem;
  font-weight: 700;
  text-transform: uppercase;
  letter-spacing: 0.1em;
  color: var(--text-muted);
}

.live-dot::before {
  content: '';
  width: 6px;
  height: 6px;
  border-radius: 50%;
  background: var(--success);
  box-shadow: 0 0 6px var(--success);
  animation: blink 1.5s ease-in-out infinite;
}

@keyframes blink { 0%,100%{opacity:1} 50%{opacity:0.3} }

/* ── UTILITY ── */
.hidden   { display: none !important; }
.sr-only  { position: absolute; width: 1px; height: 1px; overflow: hidden; clip: rect(0,0,0,0); }
.flex     { display: flex; }
.flex-col { display: flex; flex-direction: column; }
.items-center  { align-items: center; }
.justify-between { justify-content: space-between; }
.justify-center  { justify-content: center; }
.gap-1  { gap: 0.5rem; }
.gap-2  { gap: 1rem; }
.w-full { width: 100%; }
.mt-1   { margin-top: 0.5rem; }
.mt-2   { margin-top: 1rem; }
.mt-3   { margin-top: 1.5rem; }
.mb-1   { margin-bottom: 0.5rem; }
.mb-2   { margin-bottom: 1rem; }
.mb-3   { margin-bottom: 1.5rem; }
.p-1    { padding: 0.5rem; }
.p-2    { padding: 1rem; }
.p-3    { padding: 1.5rem; }

/* ── ANIMATIONS ── */
@keyframes fadeUp {
  from { opacity: 0; transform: translateY(10px); }
  to   { opacity: 1; transform: translateY(0); }
}

@keyframes fadeIn {
  from { opacity: 0; }
  to   { opacity: 1; }
}

@keyframes pulse {
  0%,100% { transform: scale(1); opacity: 0.7; }
  50%     { transform: scale(1.05); opacity: 1; }
}

.animate-fadeUp { animation: fadeUp 0.3s ease forwards; }
.animate-fadeIn { animation: fadeIn 0.3s ease forwards; }

/* ── PRO GATE OVERLAY ── */
.pro-gate {
  position: relative;
  overflow: hidden;
}

.pro-gate-overlay {
  position: absolute;
  inset: 0;
  background: rgba(13,13,13,0.85);
  backdrop-filter: blur(4px);
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
  gap: 0.75rem;
  border-radius: inherit;
  z-index: 10;
}

.pro-gate-overlay .badge-pro { margin-bottom: 0.25rem; }
.pro-gate-overlay p { font-size: 0.82rem; color: var(--text-muted); text-align: center; max-width: 200px; }

/* ── FOOTER ── */
.footer {
  border-top: 1px solid var(--border);
  padding: 1.5rem 1.25rem;
  text-align: center;
}

.footer-logo {
  font-size: 1.1rem;
  font-weight: 800;
  background: var(--grad);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
  margin-bottom: 0.65rem;
}

.footer p {
  font-size: 0.75rem;
  color: var(--text-muted);
  margin-bottom: 0.65rem;
}

.footer-links {
  display: flex;
  justify-content: center;
  gap: 1.2rem;
  flex-wrap: wrap;
}

.footer-links a {
  font-size: 0.75rem;
  color: var(--text-muted);
  transition: color 0.2s;
}

.footer-links a:hover { color: var(--accent); }

/* ── SCROLLBAR ── */
::-webkit-scrollbar { width: 4px; height: 4px; }
::-webkit-scrollbar-track { background: transparent; }
::-webkit-scrollbar-thumb { background: var(--surface-3); border-radius: 2px; }