/* ===========================
   NGHỀ TRADING – style.css
   =========================== */

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

:root {
  --black: #0d0d0d;
  --off-black: #141414;
  --dark: #1a1a1a;
  --mid: #2e2e2e;
  --border: #e5e5e5;
  --text: #1a1a1a;
  --muted: #666;
  --white: #ffffff;
  --accent: #ffffff;
  --green: #22a047;
  --red: #d93025;
  --be: #888;
  --font-display: 'Playfair Display', Georgia, serif;
  --font-body: 'Inter', system-ui, sans-serif;
  --nav-h: 60px;
}

html { scroll-behavior: smooth; }

body {
  font-family: var(--font-body);
  color: var(--text);
  background: #fff;
  line-height: 1.6;
  font-size: 15px;
}

a { color: inherit; text-decoration: none; }
ul { list-style: none; }
img { display: block; max-width: 100%; }

.container {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
}

/* ===== NAVBAR ===== */
.navbar {
  position: fixed;
  top: 0; left: 0; right: 0;
  z-index: 100;
  background: var(--black);
  border-bottom: 1px solid #2a2a2a;
  transition: box-shadow .3s;
}
.navbar.scrolled { box-shadow: 0 2px 20px rgba(0,0,0,.4); }
.nav-inner {
  max-width: 1100px;
  margin: 0 auto;
  padding: 0 24px;
  height: var(--nav-h);
  display: flex;
  align-items: center;
  gap: 40px;
}
.logo {
  font-family: var(--font-body);
  font-weight: 700;
  font-size: 14px;
  letter-spacing: .15em;
  color: var(--white);
  white-space: nowrap;
}
.nav-links {
  display: flex;
  gap: 28px;
  flex: 1;
  justify-content: center;
}
.nav-links a {
  color: rgba(255,255,255,.65);
  font-size: 13px;
  font-weight: 500;
  letter-spacing: .06em;
  transition: color .2s;
  text-transform: capitalize;
}
.nav-links a:hover,
.nav-links a.active { color: var(--white); border-bottom: 1px solid #fff; padding-bottom: 1px; }
.search-btn {
  background: none;
  border: none;
  color: rgba(255,255,255,.65);
  cursor: pointer;
  display: flex;
  align-items: center;
  transition: color .2s;
}
.search-btn:hover { color: #fff; }
.hamburger {
  display: none;
  flex-direction: column;
  gap: 5px;
  background: none;
  border: none;
  cursor: pointer;
  padding: 4px;
}
.hamburger span {
  display: block;
  width: 22px; height: 2px;
  background: #fff;
  border-radius: 2px;
  transition: .3s;
}
.mobile-menu {
  display: none;
  background: var(--off-black);
  padding: 16px 24px 24px;
}
.mobile-menu.open { display: block; }
.mobile-menu ul { display: flex; flex-direction: column; gap: 16px; }
.mobile-menu a {
  color: rgba(255,255,255,.75);
  font-size: 14px;
  font-weight: 500;
  letter-spacing: .05em;
}

/* ===== HERO ===== */
.hero {
  background: var(--black);
  padding-top: var(--nav-h);
  min-height: 520px;
}
.hero-content {
  max-width: 1100px;
  margin: 0 auto;
  padding: 72px 24px 80px;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
}
.hero-text h1 {
  font-family: var(--font-display);
  font-size: clamp(32px, 4vw, 52px);
  line-height: 1.2;
  color: var(--white);
  font-weight: 700;
  margin-bottom: 24px;
}
.hero-text h1 em {
  font-style: italic;
  font-weight: 400;
  opacity: .9;
}
.hero-text p {
  color: rgba(255,255,255,.6);
  font-size: 15px;
  line-height: 1.7;
  max-width: 380px;
  margin-bottom: 36px;
}
.btn-primary {
  display: inline-block;
  background: var(--white);
  color: var(--black);
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .12em;
  padding: 14px 28px;
  border: 2px solid #fff;
  transition: background .2s, color .2s;
}
.btn-primary:hover {
  background: transparent;
  color: #fff;
}

/* chart mockup */
.hero-visual {
  display: flex;
  flex-direction: column;
  gap: 24px;
}
.chart-mockup {
  background: #1c1c1c;
  border: 1px solid #2a2a2a;
  border-radius: 4px;
  padding: 24px;
  position: relative;
  overflow: hidden;
}
.chart-svg { width: 100%; height: auto; }
.lamp-glow {
  position: absolute;
  bottom: -40px; right: -20px;
  width: 160px; height: 160px;
  background: radial-gradient(circle, rgba(255,255,255,.06) 0%, transparent 70%);
  pointer-events: none;
}
.hero-quote {
  background: #1c1c1c;
  border-left: 2px solid rgba(255,255,255,.3);
  padding: 20px 24px;
}
.quote-mark {
  font-family: var(--font-display);
  font-size: 40px;
  color: rgba(255,255,255,.2);
  line-height: 1;
  display: block;
  margin-bottom: 8px;
}
.hero-quote p {
  color: rgba(255,255,255,.7);
  font-size: 13px;
  line-height: 1.6;
  font-style: italic;
  margin-bottom: 8px;
}
.hero-quote cite {
  color: rgba(255,255,255,.4);
  font-size: 12px;
  font-style: normal;
  font-weight: 500;
}

/* ===== PILLARS ===== */
.pillars {
  background: var(--white);
  border-bottom: 1px solid var(--border);
  padding: 0;
}
.pillar-grid {
  display: flex;
  align-items: stretch;
}
.pillar {
  flex: 1;
  display: flex;
  gap: 20px;
  padding: 40px 32px;
}
.pillar-divider {
  width: 1px;
  background: var(--border);
  flex-shrink: 0;
}
.pillar-icon {
  color: var(--text);
  opacity: .55;
  flex-shrink: 0;
  padding-top: 3px;
}
.pillar-body h3 {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  margin-bottom: 10px;
  color: var(--text);
}
.pillar-body p {
  font-size: 13px;
  color: var(--muted);
  line-height: 1.6;
  margin-bottom: 14px;
}
.link-arrow {
  font-size: 13px;
  font-weight: 500;
  color: var(--text);
  text-decoration: underline;
  text-underline-offset: 3px;
  transition: opacity .2s;
}
.link-arrow:hover { opacity: .6; }

/* ===== CONTENT SECTION ===== */
.content-section { padding: 56px 0 72px; }
.content-grid {
  display: grid;
  grid-template-columns: 1fr 320px;
  gap: 48px;
  align-items: start;
}
.section-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  margin-bottom: 24px;
}
.section-header h2 {
  font-size: 13px;
  font-weight: 700;
  letter-spacing: .12em;
  color: var(--text);
}
.see-all {
  font-size: 13px;
  color: var(--muted);
  transition: color .2s;
}
.see-all:hover { color: var(--text); }

/* articles */
.articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}
.article-card { display: flex; flex-direction: column; }
.article-img {
  width: 100%;
  aspect-ratio: 16/10;
  background-size: cover;
  background-position: center;
  background-color: #e8e5e0;
  margin-bottom: 14px;
}
.chess-bg-1 {
  background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='120'%3E%3Crect width='200' height='120' fill='%23222'/%3E%3Cg fill='%23333'%3E%3Crect x='0' y='0' width='25' height='25'/%3E%3Crect x='50' y='0' width='25' height='25'/%3E%3Crect x='100' y='0' width='25' height='25'/%3E%3Crect x='150' y='0' width='25' height='25'/%3E%3Crect x='25' y='25' width='25' height='25'/%3E%3Crect x='75' y='25' width='25' height='25'/%3E%3Crect x='125' y='25' width='25' height='25'/%3E%3Crect x='175' y='25' width='25' height='25'/%3E%3C/g%3E%3C/svg%3E");
  background-color: #1a1a1a;
}
.chess-bg-2 { background-color: #2a2a2a; background-image: url("data:image/svg+xml,%3Csvg xmlns='http://www.w3.org/2000/svg' width='200' height='120'%3E%3Crect width='200' height='120' fill='%231e1e1e'/%3E%3Cg fill='%232e2e2e'%3E%3Crect x='25' y='0' width='25' height='25'/%3E%3Crect x='75' y='0' width='25' height='25'/%3E%3Crect x='125' y='0' width='25' height='25'/%3E%3Crect x='175' y='0' width='25' height='25'/%3E%3Crect x='0' y='25' width='25' height='25'/%3E%3Crect x='50' y='25' width='25' height='25'/%3E%3Crect x='100' y='25' width='25' height='25'/%3E%3Crect x='150' y='25' width='25' height='25'/%3E%3C/g%3E%3C/svg%3E"); }
.notebook-bg { background-color: #111; }
.article-meta .tag {
  font-size: 10px;
  font-weight: 700;
  letter-spacing: .1em;
  color: var(--muted);
  display: block;
  margin-bottom: 8px;
}
.article-meta h4 {
  font-size: 14px;
  font-weight: 600;
  line-height: 1.4;
  margin-bottom: 8px;
  color: var(--text);
}
.article-meta p {
  font-size: 12px;
  color: var(--muted);
  line-height: 1.5;
  margin-bottom: 10px;
}
.article-meta time {
  font-size: 11px;
  color: #aaa;
}

/* journal table */
.journal-table-wrap { overflow-x: auto; }
.journal-table {
  width: 100%;
  border-collapse: collapse;
  font-size: 13px;
}
.journal-table th {
  text-align: left;
  font-size: 11px;
  font-weight: 600;
  letter-spacing: .08em;
  color: var(--muted);
  border-bottom: 1px solid var(--border);
  padding: 10px 12px;
}
.journal-table td {
  padding: 13px 12px;
  border-bottom: 1px solid #f0f0f0;
  color: var(--text);
}
.journal-table tr:last-child td { border-bottom: none; }
.result {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .05em;
  padding: 3px 8px;
  border-radius: 3px;
}
.result.win { color: var(--green); background: #f0faf3; }
.result.loss { color: var(--red); background: #fdf2f2; }
.result.be { color: var(--be); background: #f5f5f5; }

/* ===== SIDEBAR ===== */
.sidebar { display: flex; flex-direction: column; gap: 24px; }
.signup-box {
  border: 1px solid var(--border);
  padding: 24px;
}
.signup-box h3 {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  margin-bottom: 10px;
}
.signup-box p {
  font-size: 13px;
  color: var(--muted);
  margin-bottom: 16px;
  line-height: 1.5;
}
.signup-box input {
  width: 100%;
  border: 1px solid var(--border);
  padding: 10px 14px;
  font-size: 13px;
  font-family: var(--font-body);
  outline: none;
  margin-bottom: 10px;
  transition: border-color .2s;
}
.signup-box input:focus { border-color: #999; }
.btn-dark {
  width: 100%;
  background: var(--black);
  color: #fff;
  border: none;
  padding: 12px;
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  cursor: pointer;
  font-family: var(--font-body);
  transition: opacity .2s;
}
.btn-dark:hover { opacity: .8; }

.sidebar-quote {
  background: #f9f9f9;
  border-left: 2px solid var(--text);
  padding: 20px 20px 20px 24px;
}
.quote-mark-dark {
  font-family: var(--font-display);
  font-size: 36px;
  color: #ccc;
  line-height: 1;
  display: block;
  margin-bottom: 8px;
}
.sidebar-quote p {
  font-size: 13px;
  font-style: italic;
  color: var(--text);
  line-height: 1.6;
  margin-bottom: 10px;
}
.sidebar-quote cite,
.hero-quote cite {
  font-size: 12px;
  color: var(--muted);
  font-style: normal;
  font-weight: 500;
}

.sidebar-stats {
  border: 1px solid var(--border);
  padding: 24px;
}
.sidebar-stats h3 {
  font-size: 12px;
  font-weight: 700;
  letter-spacing: .1em;
  margin-bottom: 16px;
}
.stat-row {
  display: flex;
  justify-content: space-between;
  align-items: center;
  padding: 10px 0;
  border-bottom: 1px solid #f0f0f0;
  font-size: 13px;
}
.stat-row:last-child { border-bottom: none; }
.stat-row span { color: var(--muted); }
.stat-row strong { font-weight: 600; }
.green { color: var(--green); }

/* ===== FOOTER ===== */
.footer {
  background: var(--black);
  color: rgba(255,255,255,.7);
  padding: 56px 0 32px;
}
.footer-grid {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr 1fr;
  gap: 40px;
  margin-bottom: 48px;
}
.footer-brand .logo {
  color: #fff;
  font-size: 14px;
  letter-spacing: .15em;
  margin-bottom: 16px;
  display: block;
}
.footer-brand p {
  font-size: 13px;
  line-height: 1.6;
  color: rgba(255,255,255,.45);
  max-width: 240px;
}
.footer-col h4 {
  font-size: 11px;
  font-weight: 700;
  letter-spacing: .12em;
  color: rgba(255,255,255,.4);
  margin-bottom: 16px;
}
.footer-col ul { display: flex; flex-direction: column; gap: 10px; }
.footer-col a {
  font-size: 13px;
  color: rgba(255,255,255,.65);
  transition: color .2s;
}
.footer-col a:hover { color: #fff; }
.social-icons { display: flex; gap: 10px; }
.social-icon {
  width: 36px; height: 36px;
  border: 1px solid rgba(255,255,255,.2);
  border-radius: 50%;
  display: flex; align-items: center; justify-content: center;
  color: rgba(255,255,255,.65);
  transition: border-color .2s, color .2s;
}
.social-icon:hover { border-color: #fff; color: #fff; }
.footer-bottom {
  border-top: 1px solid rgba(255,255,255,.1);
  padding-top: 24px;
  font-size: 11px;
  color: rgba(255,255,255,.3);
  letter-spacing: .05em;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  .hero-content { grid-template-columns: 1fr; gap: 32px; }
  .hero-visual { order: -1; }
  .hero-text p { max-width: 100%; }
  .content-grid { grid-template-columns: 1fr; }
  .sidebar { order: -1; }
  .footer-grid { grid-template-columns: 1fr 1fr; gap: 32px; }
  .articles-grid { grid-template-columns: 1fr 1fr; }
}
@media (max-width: 640px) {
  .nav-links { display: none; }
  .search-btn { display: none; }
  .hamburger { display: flex; margin-left: auto; }
  .pillar-grid { flex-direction: column; }
  .pillar-divider { width: 100%; height: 1px; }
  .articles-grid { grid-template-columns: 1fr; }
  .footer-grid { grid-template-columns: 1fr; }
  .hero-text h1 { font-size: 28px; }
}

/* scroll animation */
.fade-in {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity .5s ease, transform .5s ease;
}
.fade-in.visible { opacity: 1; transform: translateY(0); }