/* =============================================
   آیاد | یادگیری عمیق از کتاب
   tn/web/css/main.css  v1.0.0
   ============================================= */

@font-face {
  font-family: 'IRANSans';
  src: url('../fonts/IRANSans.eot');
  src: url('../fonts/IRANSans.eot?#iefix') format('embedded-opentype'),
       url('../fonts/IRANSans.woff2') format('woff2'),
       url('../fonts/IRANSans.woff') format('woff'),
       url('../fonts/IRANSans.ttf') format('truetype');
  font-weight: 400; font-style: normal; font-display: swap;
}
@font-face {
  font-family: 'IRANSans';
  src: url('../fonts/IRANSans_Bold.eot');
  src: url('../fonts/IRANSans_Bold.eot?#iefix') format('embedded-opentype'),
       url('../fonts/IRANSans_Bold.woff2') format('woff2'),
       url('../fonts/IRANSans_Bold.woff') format('woff'),
       url('../fonts/IRANSans_Bold.ttf') format('truetype');
  font-weight: 700; font-style: normal; font-display: swap;
}

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

:root {
  /* رنگ اصلی: آبی اقیانوسی + نارنجی */
  --c-primary:    #0369a1;
  --c-primary-l:  #0ea5e9;
  --c-primary-d:  #0c4a6e;
  --c-accent:     #f97316;
  --c-accent-l:   #fb923c;
  --c-green:      #10b981;
  --c-green-l:    #d1fae5;
  --c-red:        #ef4444;
  --c-red-l:      #fee2e2;
  --c-teal:       #0891b2;
  --c-teal-l:     #e0f7fa;

  --text-dark:    #0c2340;
  --text-mid:     #0369a1;
  --text-body:    #334155;
  --text-light:   #64748b;
  --bg-white:     #ffffff;
  --bg-light:     #f0f9ff;
  --bg-dark:      #0c2340;
  --bg-darker:    #060f1e;

  --radius-sm:  6px;
  --radius-md:  14px;
  --radius-lg:  22px;
  --radius-xl:  36px;
  --shadow-sm:  0 2px 8px rgba(91,33,182,.08);
  --shadow-md:  0 8px 32px rgba(91,33,182,.14);
  --shadow-lg:  0 24px 64px rgba(91,33,182,.18);
  --transition: .25s cubic-bezier(.4,0,.2,1);
  --font: 'IRANSans', Tahoma, sans-serif;
}

html { scroll-behavior: smooth; overflow-x: hidden; }
body {
  font-family: var(--font);
  font-size: 16px;
  line-height: 1.75;
  color: var(--text-body);
  background: var(--bg-white);
  direction: rtl;
  overflow-x: hidden;
}
img { max-width: 100%; display: block; }
a { text-decoration: none; color: inherit; }
ul { list-style: none; }
.container { width: min(1140px, 92%); margin: 0 auto; }
.section { padding: 96px 0; }
.section--dark  { background: var(--bg-dark); color: #fff; }
.section--light { background: var(--bg-light); }

/* ---- Section Header ---- */
.section-header { text-align: center; max-width: 640px; margin: 0 auto 64px; }
.section-tag {
  display: inline-block; font-size: 12px; font-weight: 700;
  letter-spacing: .08em; text-transform: uppercase;
  color: var(--c-primary-l); background: rgba(124,58,237,.1);
  padding: 5px 16px; border-radius: 99px; margin-bottom: 18px;
}
.section--dark .section-tag { background: rgba(255,255,255,.1); color: rgba(255,255,255,.8); }
.section-title { font-size: clamp(24px, 4vw, 36px); font-weight: 700; line-height: 1.3; margin-bottom: 16px; color: var(--text-dark); }
.section--dark .section-title { color: #fff; }
.section-desc { font-size: 17px; color: var(--text-body); line-height: 1.85; }
.section--dark .section-desc { color: rgba(255,255,255,.7); }

/* ============================================
   BUTTONS
   ============================================ */
.btn {
  display: inline-flex; align-items: center; gap: 8px;
  padding: 12px 28px; border-radius: var(--radius-md);
  font-family: var(--font); font-size: 15px; font-weight: 700;
  cursor: pointer; border: 2px solid transparent;
  transition: all var(--transition); text-decoration: none;
}
.btn-primary {
  background: linear-gradient(135deg, var(--c-primary-l), var(--c-primary));
  color: #fff; border-color: transparent;
  box-shadow: 0 4px 16px rgba(124,58,237,.35);
}
.btn-primary:hover { transform: translateY(-2px); box-shadow: 0 8px 28px rgba(124,58,237,.45); }
.btn-outline {
  background: transparent; color: var(--c-primary);
  border-color: var(--c-primary);
}
.btn-outline:hover { background: var(--c-primary); color: #fff; transform: translateY(-2px); }
.btn-ghost {
  background: rgba(255,255,255,.12); color: #fff;
  border-color: rgba(255,255,255,.25);
}
.btn-ghost:hover { background: rgba(255,255,255,.2); transform: translateY(-2px); }
.btn-lg { padding: 16px 40px; font-size: 16px; border-radius: var(--radius-lg); }
.btn-full { width: 100%; justify-content: center; }
.btn-primary-sm {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 22px;
  background: linear-gradient(135deg, var(--c-primary-l), var(--c-primary));
  color: #fff; border-radius: var(--radius-md);
  font-weight: 700; font-size: 14px; transition: all var(--transition);
}
.btn-primary-sm:hover { transform: translateY(-1px); box-shadow: var(--shadow-md); }

/* ============================================
   NAVBAR
   ============================================ */
.navbar {
  position: fixed; top: 0; right: 0; left: 0; z-index: 900;
  background: rgba(255,255,255,.93);
  backdrop-filter: blur(20px); -webkit-backdrop-filter: blur(20px);
  border-bottom: 1px solid rgba(91,33,182,.08);
  transition: box-shadow var(--transition);
}
.navbar.scrolled { box-shadow: var(--shadow-sm); }
.nav-inner { display: flex; align-items: center; gap: 24px; height: 68px; }
.logo { display: flex; align-items: center; gap: 10px; flex-shrink: 0; }
.logo-mark {
  width: 38px; height: 38px;
  background: linear-gradient(135deg, var(--c-primary-l), var(--c-primary-d));
  color: #fff; border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 18px; font-weight: 700; font-family: Georgia, serif;
  flex-shrink: 0; letter-spacing: -1px;
}
.logo-titles { display: flex; flex-direction: column; gap: 1px; }
.logo-text { font-size: 17px; font-weight: 700; color: var(--c-primary); font-family: IranSans,Georgia, serif; line-height: 1.1; }
.logo-sub  { font-size: 10px; color: var(--text-light); white-space: nowrap; }
.nav-links { display: flex; align-items: center; gap: 2px; margin-right: auto; }
.nav-links a {
  font-size: 13px; font-weight: 500; color: var(--text-body);
  padding: 6px 12px; border-radius: var(--radius-sm); transition: all var(--transition);
}
.nav-links a:hover { color: var(--c-primary); background: rgba(91,33,182,.06); }
.nav-cta { display: flex; align-items: center; }
.hamburger {
  display: none; flex-direction: column; gap: 5px;
  background: none; border: none; cursor: pointer; padding: 4px; margin-right: auto;
}
.hamburger span { display: block; width: 24px; height: 2px; background: var(--text-dark); border-radius: 2px; transition: all var(--transition); }

/* ============================================
   HERO
   ============================================ */
.hero {
  position: relative; min-height: 100vh;
  display: flex; flex-direction: column; justify-content: center;
  padding: 140px 0 80px; overflow: hidden;
  background: linear-gradient(145deg, #0f0a23 0%, #1e1b4b 45%, #2d1b6e 100%);
  color: #fff;
}
.hero-bg { position: absolute; inset: 0; pointer-events: none; }
.hero-shapes { position: absolute; inset: 0; }
.shape {
  position: absolute; border-radius: 50%;
  background: radial-gradient(circle, rgba(124,58,237,.3), transparent 70%);
  animation: float 8s ease-in-out infinite;
}
.shape-1 { width: 600px; height: 600px; top: -200px; right: -100px; animation-delay: 0s; }
.shape-2 { width: 400px; height: 400px; bottom: -100px; left: 10%; animation-delay: -3s; background: radial-gradient(circle, rgba(245,158,11,.15), transparent 70%); }
.shape-3 { width: 300px; height: 300px; top: 30%; left: 60%; animation-delay: -6s; background: radial-gradient(circle, rgba(14,165,233,.2), transparent 70%); }
@keyframes float {
  0%,100% { transform: translateY(0) scale(1); }
  50%      { transform: translateY(-30px) scale(1.05); }
}

.hero-inner { position: relative; z-index: 1; text-align: center; max-width: 760px; margin: 0 auto; }
.hero-badge {
  display: inline-flex; align-items: center; gap: 8px;
  background: rgba(245,158,11,.15); border: 1px solid rgba(245,158,11,.3);
  color: var(--c-accent-l); font-size: 13px; font-weight: 700;
  padding: 7px 18px; border-radius: 99px; margin-bottom: 32px;
}
.badge-dot {
  width: 7px; height: 7px; background: var(--c-accent-l);
  border-radius: 50%; animation: pulse 2s infinite;
}
@keyframes pulse { 0%,100%{opacity:1;transform:scale(1)} 50%{opacity:.5;transform:scale(1.4)} }

.hero-title {
  font-size: clamp(34px, 6vw, 64px); font-weight: 700;
  line-height: 1.2; margin-bottom: 28px;
  text-shadow: 0 2px 20px rgba(0,0,0,.3);
}
.hero-title .highlight {
  background: linear-gradient(135deg, var(--c-accent-l), var(--c-accent));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text;
}
.hero-desc {
  font-size: 18px; line-height: 1.9; color: rgba(255,255,255,.78);
  margin-bottom: 44px; max-width: 620px; margin-left: auto; margin-right: auto;
}
.hero-actions { display: flex; justify-content: center; gap: 14px; flex-wrap: wrap; }

.hero-scroll-hint {
  position: absolute; bottom: 32px; left: 50%; transform: translateX(-50%);
  display: flex; flex-direction: column; align-items: center; gap: 6px;
  color: rgba(255,255,255,.4); font-size: 12px; animation: bounce 2s infinite;
}
@keyframes bounce { 0%,100%{transform:translateX(-50%) translateY(0)} 50%{transform:translateX(-50%) translateY(6px)} }

/* ============================================
   WHY
   ============================================ */
.why-grid {
  display: grid; grid-template-columns: repeat(3,1fr); gap: 24px;
  margin-bottom: 48px;
}
.why-card {
  background: var(--bg-light);
  border: 1.5px solid rgba(91,33,182,.1);
  border-radius: var(--radius-lg);
  padding: 36px 28px; text-align: center;
  transition: all var(--transition);
}
.why-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: rgba(91,33,182,.25); }
.why-num {
  font-size: 52px; font-weight: 700;
  background: linear-gradient(135deg, var(--c-primary-l), var(--c-accent));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; line-height: 1; margin-bottom: 16px;
}
.why-card p { font-size: 15px; color: var(--text-body); line-height: 1.85; margin-bottom: 16px; }
.why-src {
  font-size: 12px; color: var(--text-light);
  border-top: 1px solid rgba(91,33,182,.1); padding-top: 12px; margin-top: 8px;
  font-style: italic;
}
.why-conclusion {
  background: linear-gradient(135deg, rgba(91,33,182,.07), rgba(245,158,11,.05));
  border: 1.5px solid rgba(91,33,182,.12);
  border-radius: var(--radius-lg); padding: 28px 36px; text-align: center;
}
.why-conclusion p { font-size: 17px; color: var(--text-body); line-height: 1.9; }
.why-conclusion strong { color: var(--c-primary); }

/* ============================================
   DEMO / QUIZ
   ============================================ */
.demo { background: var(--bg-light); }

.quiz-container {
  max-width: 760px; margin: 0 auto;
  background: var(--bg-white);
  border-radius: var(--radius-xl);
  box-shadow: var(--shadow-lg);
  overflow: hidden;
}
.quiz-card { display: none; padding: 44px; }
.quiz-card.active { display: block; }

.quiz-book {
  display: flex; align-items: center; gap: 10px;
  margin-bottom: 24px; flex-wrap: wrap;
}
.book-label {
  font-size: 15px; font-weight: 700; color: var(--c-primary);
  background: rgba(91,33,182,.08); padding: 4px 14px; border-radius: 99px;
}
.book-author { font-size: 13px; color: var(--text-light); }
.book-genre {
  font-size: 12px; color: var(--c-teal);
  background: var(--c-teal-l); padding: 3px 12px; border-radius: 99px;
  margin-right: auto;
}
.quiz-question {
  font-size: 19px; font-weight: 700; color: var(--text-dark);
  line-height: 1.6; margin-bottom: 28px;
}
.quiz-options { display: flex; flex-direction: column; gap: 12px; margin-bottom: 20px; }
.quiz-opt {
  display: block; width: 100%;
  text-align: right; padding: 14px 20px;
  background: var(--bg-light); border: 2px solid rgba(91,33,182,.1);
  border-radius: var(--radius-md); font-family: var(--font);
  font-size: 15px; color: var(--text-body);
  cursor: pointer; transition: all var(--transition); line-height: 1.6;
}
.quiz-opt:hover:not(:disabled) {
  border-color: var(--c-primary-l);
  background: rgba(91,33,182,.05);
}
.quiz-opt.correct {
  background: var(--c-green-l); border-color: var(--c-green);
  color: #065f46; font-weight: 700;
}
.quiz-opt.wrong {
  background: var(--c-red-l); border-color: var(--c-red);
  color: #7f1d1d;
}
.quiz-opt:disabled { cursor: default; }

.quiz-explain {
  background: rgba(91,33,182,.06);
  border-right: 3px solid var(--c-primary-l);
  border-radius: 0 var(--radius-md) var(--radius-md) 0;
  padding: 14px 18px; font-size: 14px;
  color: var(--text-body); line-height: 1.8; margin-top: 16px;
}

.quiz-nav {
  display: flex; align-items: center; justify-content: space-between;
  padding: 20px 44px; border-top: 1px solid rgba(91,33,182,.08);
  background: var(--bg-light);
}
.quiz-prev, .quiz-next {
  display: inline-flex; align-items: center; gap: 6px;
  padding: 9px 20px; border-radius: var(--radius-md);
  font-family: var(--font); font-size: 14px; font-weight: 600;
  border: 1.5px solid rgba(91,33,182,.2); background: var(--bg-white);
  color: var(--c-primary); cursor: pointer; transition: all var(--transition);
}
.quiz-prev:hover:not(:disabled), .quiz-next:hover:not(:disabled) {
  background: var(--c-primary); color: #fff; border-color: var(--c-primary);
}
.quiz-prev:disabled, .quiz-next:disabled { opacity: .35; cursor: default; }
.quiz-dots { display: flex; gap: 8px; }
.qdot {
  width: 8px; height: 8px; border-radius: 50%;
  background: rgba(91,33,182,.2); transition: all var(--transition);
}
.qdot.active { background: var(--c-primary-l); transform: scale(1.3); }

.demo-cta {
  text-align: center; margin-top: 40px;
  display: flex; flex-direction: column; align-items: center; gap: 16px;
}
.demo-cta p { font-size: 15px; color: var(--text-light); }

/* ============================================
   HOW
   ============================================ */
.how-steps {
  display: flex; align-items: flex-start;
  justify-content: center; gap: 0; flex-wrap: wrap;
}
.how-step {
  flex: 1; min-width: 200px; max-width: 280px;
  text-align: center; padding: 32px 24px;
  background: rgba(255,255,255,.05);
  border: 1px solid rgba(255,255,255,.1);
  border-radius: var(--radius-lg);
  transition: all var(--transition);
}
.how-step:hover { background: rgba(255,255,255,.09); transform: translateY(-4px); }
.how-num {
  display: inline-flex; align-items: center; justify-content: center;
  width: 36px; height: 36px; border-radius: 50%;
  background: rgba(245,158,11,.2); color: var(--c-accent-l);
  font-size: 15px; font-weight: 700; margin: 0 auto 16px;
  border: 1.5px solid rgba(245,158,11,.3);
}
.how-icon {
  width: 52px; height: 52px; margin: 0 auto 18px;
  background: rgba(255,255,255,.08); border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center; color: rgba(255,255,255,.7);
}
.how-icon svg { width: 26px; height: 26px; }
.how-step h3 { font-size: 17px; font-weight: 700; margin-bottom: 10px; color: #fff; }
.how-step p  { font-size: 14px; color: rgba(255,255,255,.6); line-height: 1.8; }
.how-arrow {
  display: flex; align-items: center; padding: 0 8px;
  font-size: 22px; color: rgba(255,255,255,.2); margin-top: 80px;
}

/* ============================================
   WHO
   ============================================ */
.who-grid {
  display: grid; grid-template-columns: repeat(3,1fr); gap: 20px;
}
.who-card {
  background: var(--bg-white);
  border: 1.5px solid rgba(91,33,182,.1);
  border-radius: var(--radius-lg);
  padding: 28px; transition: all var(--transition);
}
.who-card:hover { transform: translateY(-4px); box-shadow: var(--shadow-md); border-color: rgba(91,33,182,.25); }
.who-icon { font-size: 32px; margin-bottom: 14px; }
.who-card h3 { font-size: 17px; font-weight: 700; color: var(--text-dark); margin-bottom: 8px; }
.who-card p  { font-size: 14px; color: var(--text-body); line-height: 1.85; }

/* ============================================
   PUBLISHERS
   ============================================ */
.publishers-inner {
  display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: center;
}
.pub-text h2 { font-size: 28px; font-weight: 700; color: var(--text-dark); margin-bottom: 16px; line-height: 1.35; }
.pub-text p  { font-size: 16px; color: var(--text-body); margin-bottom: 28px; line-height: 1.85; }
.pub-visual {
  display: flex; flex-direction: column; gap: 20px;
}
.pub-stat {
  background: linear-gradient(135deg, rgba(91,33,182,.06), rgba(245,158,11,.04));
  border: 1.5px solid rgba(91,33,182,.12);
  border-radius: var(--radius-lg); padding: 20px 28px;
  display: flex; align-items: center; gap: 20px;
  font-size: 15px; color: var(--text-body);
  transition: all var(--transition);
}
.pub-stat:hover { border-color: rgba(91,33,182,.3); box-shadow: var(--shadow-sm); }
.pub-stat span {
  font-size: 32px; font-weight: 700;
  background: linear-gradient(135deg, var(--c-primary-l), var(--c-accent));
  -webkit-background-clip: text; -webkit-text-fill-color: transparent;
  background-clip: text; min-width: 60px;
}

/* ============================================
   SIGNUP
   ============================================ */
.signup {
  background: linear-gradient(145deg, #0f0a23 0%, #1e1b4b 60%, #2d1b6e 100%);
  color: #fff;
}
.signup-box {
  display: grid; grid-template-columns: 1fr 1fr; gap: 72px; align-items: start;
}
.signup-text h2 { font-size: 30px; font-weight: 700; margin-bottom: 14px; color: #fff; line-height: 1.3; }
.signup-text p  { font-size: 16px; color: rgba(255,255,255,.7); margin-bottom: 28px; }
.signup-perks { display: flex; flex-direction: column; gap: 10px; }
.signup-perks li {
  font-size: 15px; color: rgba(255,255,255,.8);
  display: flex; align-items: center; gap: 10px;
}
.signup-perks li::before {
  content: '✓'; color: var(--c-green);
  font-weight: 700; flex-shrink: 0;
}

.signup-form { display: flex; flex-direction: column; gap: 14px; }
.signup-form input,
.signup-form select {
  padding: 14px 18px;
  border-radius: var(--radius-md);
  border: 1.5px solid rgba(255,255,255,.15);
  background: rgba(255,255,255,.07);
  color: #fff; font-family: var(--font); font-size: 14px;
  outline: none; transition: border-color var(--transition); width: 100%;
}
.signup-form input::placeholder { color: rgba(255,255,255,.4); }
.signup-form select { cursor: pointer; }
.signup-form select option { background: var(--bg-dark); color: #fff; }
.signup-form input:focus,
.signup-form select:focus { border-color: var(--c-primary-l); }
.form-note { font-size: 12px; color: rgba(255,255,255,.4); text-align: center; }

/* ============================================
   FOOTER
   ============================================ */
.footer { background: var(--bg-darker); color: rgba(255,255,255,.65); padding: 64px 0 0; }
.footer-inner {
  display: grid; grid-template-columns: 2fr 1fr 1fr 1fr; gap: 40px;
  padding-bottom: 48px; border-bottom: 1px solid rgba(255,255,255,.07);
}
.footer-brand { max-width: 260px; }
.footer-brand p  { font-size: 13px; line-height: 1.7; margin-bottom: 8px; }
.footer-pub { font-size: 12px; color: rgba(255,255,255,.4); }
.footer-pub a { color: var(--c-accent-l); }
.footer-pub a:hover { text-decoration: underline; }
.footer-logo-wrap { display: flex; align-items: center; gap: 10px; margin-bottom: 12px; }
.footer-logo-mark {
  width: 34px; height: 34px;
  background: linear-gradient(135deg, var(--c-primary-l), var(--c-primary-d));
  color: #fff; border-radius: var(--radius-md);
  display: flex; align-items: center; justify-content: center;
  font-size: 16px; font-weight: 700; font-family: Georgia, serif;
}
.footer-logo-text { font-size: 16px; font-weight: 700; color: #fff; font-family: Georgia, serif; }
.footer-links h4 { color: #fff; font-size: 14px; margin-bottom: 14px; }
.footer-links a  { display: block; font-size: 13px; color: rgba(255,255,255,.5); margin-bottom: 9px; transition: color var(--transition); }
.footer-links a:hover { color: var(--c-accent-l); }
.footer-bottom { padding: 20px 0; font-size: 13px; color: rgba(255,255,255,.3); text-align: center; }
.footer-bottom-inner { display: flex; justify-content: center; gap: 16px; }
.footer-ver { font-size: 11px; color: rgba(255,255,255,.15); direction: ltr; }

/* ============================================
   RESPONSIVE
   ============================================ */
@media (max-width: 960px) {
  .why-grid    { grid-template-columns: 1fr; max-width: 480px; margin: 0 auto 48px; }
  .who-grid    { grid-template-columns: 1fr 1fr; }
  .publishers-inner { grid-template-columns: 1fr; gap: 40px; }
  .signup-box  { grid-template-columns: 1fr; gap: 40px; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
}

@media (max-width: 768px) {
  .section { padding: 64px 0; }
  .nav-links, .nav-cta { display: none; }
  .hamburger { display: flex; }
  .nav-links.open {
    display: flex; flex-direction: column;
    position: absolute; top: 68px; right: 0; left: 0;
    background: #fff; padding: 16px;
    border-top: 1px solid rgba(91,33,182,.08);
    box-shadow: var(--shadow-md); gap: 4px; z-index: 999;
  }
  .hero { padding: 110px 0 64px; min-height: auto; }
  .hero-title { font-size: 30px; }
  .hero-desc  { font-size: 15px; }
  .hero-actions { flex-direction: column; align-items: center; }
  .hero-actions .btn-lg { width: 100%; justify-content: center; }
  .hero-scroll-hint { display: none; }
  .quiz-card  { padding: 24px; }
  .quiz-nav   { padding: 16px 24px; }
  .quiz-question { font-size: 16px; }
  .who-grid   { grid-template-columns: 1fr; }
  .how-steps  { flex-direction: column; align-items: stretch; gap: 12px; }
  .how-step   { max-width: 100%; }
  .how-arrow  { display: none; }
  .footer-inner { grid-template-columns: 1fr 1fr; }
  .footer-brand { grid-column: span 2; }
}

@media (max-width: 480px) {
  .who-grid { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; }
  .footer-brand { grid-column: span 1; }
  .section-title { font-size: 22px; }
}