/* ============================================
   NUMBER FORGE - 数字熔炉 主样式表
   CSS前缀: nf-
   风格: 密码破译风 / 军绿深底 + 荧光数字绿
   ============================================ */

/* --- Google Fonts 本地化替代 --- */
@font-face {
  font-family: 'NF Mono';
  src: local('Courier New'), local('monospace');
  font-display: swap;
}

/* --- CSS Variables --- */
:root {
  --nf-bg-primary: #1A2A22;
  --nf-bg-secondary: #0F1A14;
  --nf-bg-card: #1E3329;
  --nf-bg-card-hover: #243D30;
  --nf-accent-green: #39FF14;
  --nf-accent-amber: #FFBF00;
  --nf-accent-red: #FF073A;
  --nf-text-primary: #E0E8E4;
  --nf-text-secondary: #8FA89A;
  --nf-text-dim: #5A7568;
  --nf-border: #2A4A38;
  --nf-shadow-green: 0 2px 15px rgba(57, 255, 20, 0.1);
  --nf-shadow-green-hover: 0 4px 25px rgba(57, 255, 20, 0.2);
  --nf-radius-card: 4px;
  --nf-radius-btn: 2px;
  --nf-radius-avatar: 50%;
  --nf-radius-panel: 0px;
  --nf-spacing-module: 48px;
  --nf-spacing-card: 16px;
  --nf-font-title: 'Courier New', 'NF Mono', monospace;
  --nf-font-body: -apple-system, 'Segoe UI', 'Noto Sans SC', 'PingFang SC', 'Microsoft YaHei', sans-serif;
  --nf-font-data: 'Courier New', 'NF Mono', monospace;
  --nf-nav-height: 60px;
}

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

html {
  font-size: 16px;
  scroll-behavior: smooth;
  -webkit-text-size-adjust: 100%;
}

body {
  font-family: var(--nf-font-body);
  background-color: var(--nf-bg-primary);
  color: var(--nf-text-primary);
  line-height: 1.7;
  overflow-x: hidden;
  min-height: 100vh;
}

a {
  color: var(--nf-accent-green);
  text-decoration: none;
  transition: color 0.2s ease;
}

a:hover {
  color: var(--nf-accent-amber);
}

img {
  max-width: 100%;
  height: auto;
  display: block;
}

h1, h2, h3, h4, h5, h6 {
  font-family: var(--nf-font-title);
  color: var(--nf-accent-green);
  line-height: 1.3;
  margin-bottom: 16px;
}

h1 { font-size: 2.2rem; }
h2 { font-size: 1.8rem; }
h3 { font-size: 1.4rem; }
h4 { font-size: 1.2rem; }

p {
  margin-bottom: 16px;
  color: var(--nf-text-primary);
}

/* --- Container --- */
.nf-container {
  width: 100%;
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

/* --- Navigation --- */
#nf-header {
  width: 100%;
  height: var(--nf-nav-height);
  background: rgba(26, 42, 34, 0.92);
  backdrop-filter: blur(8px);
  z-index: 1000;
  border-bottom: 1px solid var(--nf-border);
  position: relative;
}

.nf-nav {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: var(--nf-nav-height);
  max-width: 1280px;
  margin: 0 auto;
  padding: 0 24px;
}

.nf-nav-brand {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nf-nav-brand img {
  width: 36px;
  height: 36px;
  border-radius: 4px;
}

.nf-nav-brand-text {
  font-family: var(--nf-font-title);
  font-size: 1.1rem;
  color: var(--nf-accent-green);
  font-weight: bold;
  letter-spacing: 1px;
}

.nf-nav-links {
  display: flex;
  align-items: center;
  gap: 4px;
  list-style: none;
}

.nf-nav-links a {
  display: block;
  padding: 8px 12px;
  font-size: 0.88rem;
  color: var(--nf-text-secondary);
  transition: color 0.2s ease;
  position: relative;
  white-space: nowrap;
}

.nf-nav-links a:hover,
.nf-nav-links a.nf-active {
  color: var(--nf-accent-green);
}

.nf-nav-links a.nf-active::after {
  content: '';
  position: absolute;
  bottom: 0;
  left: 12px;
  right: 12px;
  height: 2px;
  background: var(--nf-accent-green);
}

/* --- Mobile Navigation --- */
.nf-hamburger {
  display: none;
  background: none;
  border: none;
  cursor: pointer;
  padding: 8px;
  z-index: 1100;
}

.nf-hamburger span {
  display: block;
  width: 24px;
  height: 2px;
  background: var(--nf-accent-green);
  margin: 5px 0;
  transition: all 0.3s ease;
}

.nf-mobile-nav {
  display: none;
  position: fixed;
  top: 0;
  right: -100%;
  width: 100%;
  height: 100vh;
  background: rgba(15, 26, 20, 0.95);
  backdrop-filter: blur(12px);
  z-index: 1050;
  transition: right 0.3s ease;
  padding: 80px 32px 32px;
}

.nf-mobile-nav.nf-open {
  right: 0;
}

.nf-mobile-nav-close {
  position: absolute;
  top: 16px;
  right: 24px;
  background: none;
  border: none;
  color: var(--nf-accent-green);
  font-size: 28px;
  cursor: pointer;
  font-family: var(--nf-font-title);
}

.nf-mobile-nav a {
  display: block;
  padding: 16px 0;
  font-size: 18px;
  font-family: var(--nf-font-title);
  color: var(--nf-text-primary);
  border-bottom: 1px solid var(--nf-border);
  line-height: 56px;
}

.nf-mobile-nav a:hover {
  color: var(--nf-accent-green);
}

/* --- Banner / Slider --- */
#nf-banner {
  position: relative;
  width: 100%;
  height: 65vh;
  overflow: hidden;
  background: var(--nf-bg-secondary);
}

.nf-slide {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  opacity: 0;
  transition: opacity 0.8s ease;
  display: flex;
  align-items: center;
  justify-content: center;
}

.nf-slide.nf-active {
  opacity: 1;
}

.nf-slide-bg {
  position: absolute;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  object-fit: cover;
  filter: brightness(0.5);
}

.nf-slide-content {
  position: relative;
  z-index: 2;
  text-align: center;
  padding: 0 24px;
  max-width: 800px;
}

.nf-slide-title {
  font-size: 2.4rem;
  color: var(--nf-accent-green);
  margin-bottom: 16px;
  text-shadow: 0 0 20px rgba(57, 255, 20, 0.4);
}

.nf-slide-desc {
  font-size: 1.05rem;
  color: var(--nf-text-primary);
  margin-bottom: 24px;
  line-height: 1.8;
}

.nf-slide-btn {
  display: inline-block;
  padding: 12px 32px;
  background: var(--nf-accent-green);
  color: var(--nf-bg-primary);
  font-family: var(--nf-font-title);
  font-weight: bold;
  font-size: 0.95rem;
  border-radius: var(--nf-radius-btn);
  transition: all 0.3s ease;
  text-transform: uppercase;
  letter-spacing: 1px;
}

.nf-slide-btn:hover {
  background: var(--nf-accent-amber);
  color: var(--nf-bg-primary);
  box-shadow: 0 0 20px rgba(255, 191, 0, 0.4);
}

.nf-banner-dots {
  position: absolute;
  bottom: 24px;
  left: 50%;
  transform: translateX(-50%);
  display: flex;
  gap: 10px;
  z-index: 3;
}

.nf-banner-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--nf-text-dim);
  cursor: pointer;
  transition: background 0.3s ease;
  border: none;
}

.nf-banner-dot.nf-active {
  background: var(--nf-accent-green);
  box-shadow: 0 0 8px rgba(57, 255, 20, 0.6);
}

/* --- Section Common --- */
.nf-section {
  padding: var(--nf-spacing-module) 0;
}

.nf-section-title {
  text-align: center;
  font-size: 1.8rem;
  margin-bottom: 32px;
  color: var(--nf-accent-green);
  position: relative;
}

.nf-section-title::after {
  content: '';
  display: block;
  width: 60px;
  height: 2px;
  background: var(--nf-accent-green);
  margin: 12px auto 0;
}

/* --- Card --- */
.nf-card {
  background: var(--nf-bg-card);
  border: 1px solid var(--nf-border);
  border-radius: var(--nf-radius-card);
  padding: var(--nf-spacing-card);
  box-shadow: var(--nf-shadow-green);
  transition: all 0.3s ease;
}

.nf-card:hover {
  border-color: var(--nf-accent-green);
  box-shadow: var(--nf-shadow-green-hover);
  background: var(--nf-bg-card-hover);
}

/* --- Draw Wall (Module 2) --- */
.nf-draw-wall {
  display: flex;
  gap: 16px;
  overflow-x: auto;
  padding-bottom: 16px;
  scroll-snap-type: x mandatory;
}

.nf-draw-card {
  min-width: 280px;
  scroll-snap-align: start;
  background: var(--nf-bg-card);
  border: 1px solid var(--nf-border);
  border-radius: var(--nf-radius-panel);
  padding: 20px;
  position: relative;
}

.nf-draw-card-title {
  font-family: var(--nf-font-title);
  font-size: 1rem;
  color: var(--nf-accent-green);
  margin-bottom: 8px;
}

.nf-draw-number {
  font-family: var(--nf-font-data);
  font-size: 2rem;
  color: var(--nf-accent-amber);
  letter-spacing: 2px;
  margin: 12px 0;
}

.nf-draw-info {
  font-size: 0.85rem;
  color: var(--nf-text-secondary);
}

.nf-draw-countdown {
  font-family: var(--nf-font-data);
  color: var(--nf-accent-red);
  font-size: 1.2rem;
}

/* --- Articles Grid (Module 3) --- */
.nf-articles-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.nf-article-card {
  position: relative;
  overflow: hidden;
}

.nf-article-card img {
  width: 100%;
  height: 180px;
  object-fit: cover;
  border-radius: var(--nf-radius-card) var(--nf-radius-card) 0 0;
}

.nf-article-stamp {
  position: absolute;
  top: 12px;
  right: 12px;
  background: var(--nf-accent-red);
  color: #fff;
  font-size: 0.7rem;
  padding: 4px 8px;
  border-radius: 2px;
  font-family: var(--nf-font-title);
  transform: rotate(5deg);
}

.nf-article-body {
  padding: 16px;
}

.nf-article-title {
  font-size: 1.05rem;
  color: var(--nf-accent-green);
  margin-bottom: 8px;
  line-height: 1.4;
}

.nf-article-meta {
  font-size: 0.8rem;
  color: var(--nf-text-dim);
  margin-bottom: 8px;
}

.nf-article-excerpt {
  font-size: 0.9rem;
  color: var(--nf-text-secondary);
  line-height: 1.6;
}

/* --- Heatmap (Module 4) --- */
.nf-heatmap-controls {
  display: flex;
  gap: 16px;
  margin-bottom: 24px;
  flex-wrap: wrap;
}

.nf-select {
  background: var(--nf-bg-card);
  border: 1px solid var(--nf-border);
  color: var(--nf-text-primary);
  padding: 8px 16px;
  border-radius: var(--nf-radius-btn);
  font-family: var(--nf-font-title);
  font-size: 0.9rem;
  cursor: pointer;
}

.nf-heatmap-grid {
  display: grid;
  grid-template-columns: repeat(7, 1fr);
  gap: 6px;
}

.nf-heatmap-cell {
  aspect-ratio: 1;
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--nf-font-data);
  font-size: 1.1rem;
  font-weight: bold;
  border-radius: 2px;
  cursor: pointer;
  transition: transform 0.2s ease;
  position: relative;
}

.nf-heatmap-cell:hover {
  transform: scale(1.1);
  z-index: 2;
}

.nf-heat-cold { background: #1a3a5c; color: #6ab0e8; }
.nf-heat-cool { background: #1a4a4a; color: #5cc8c8; }
.nf-heat-warm { background: #3a4a1a; color: #b8d84a; }
.nf-heat-hot { background: #5a3a1a; color: #ffbf00; }
.nf-heat-fire { background: #5a1a1a; color: #ff073a; }

/* --- Countdown (Module 5) --- */
#nf-countdown {
  background: var(--nf-bg-secondary);
  text-align: center;
  padding: 64px 24px;
  position: relative;
  overflow: hidden;
}

.nf-countdown-timer {
  font-family: var(--nf-font-data);
  font-size: 4.5rem;
  color: var(--nf-accent-green);
  text-shadow: 0 0 30px rgba(57, 255, 20, 0.5);
  letter-spacing: 8px;
  margin: 24px 0;
  animation: nf-pulse 2s ease-in-out infinite;
}

@keyframes nf-pulse {
  0%, 100% { opacity: 1; }
  50% { opacity: 0.7; }
}

/* --- Accordion (Module 6) --- */
.nf-accordion {
  max-width: 800px;
  margin: 0 auto;
}

.nf-accordion-item {
  border: 1px solid var(--nf-border);
  margin-bottom: 8px;
  border-radius: var(--nf-radius-card);
  overflow: hidden;
}

.nf-accordion-header {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 16px 20px;
  background: var(--nf-bg-card);
  cursor: pointer;
  font-family: var(--nf-font-title);
  color: var(--nf-accent-green);
  font-size: 1rem;
  border: none;
  width: 100%;
  text-align: left;
  transition: background 0.2s ease;
}

.nf-accordion-header:hover {
  background: var(--nf-bg-card-hover);
}

.nf-accordion-icon {
  color: var(--nf-accent-green);
  transition: transform 0.3s ease;
  font-size: 1.2rem;
}

.nf-accordion-item.nf-open .nf-accordion-icon {
  transform: rotate(45deg);
}

.nf-accordion-body {
  max-height: 0;
  overflow: hidden;
  transition: max-height 0.4s ease;
  background: var(--nf-bg-secondary);
}

.nf-accordion-item.nf-open .nf-accordion-body {
  max-height: 600px;
}

.nf-accordion-content {
  padding: 20px;
  font-size: 0.95rem;
  color: var(--nf-text-secondary);
  line-height: 1.8;
}

/* --- Prediction Express (Module 7) --- */
.nf-predict-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(240px, 1fr));
  gap: 20px;
}

.nf-predict-card {
  text-align: center;
  padding: 24px;
  cursor: pointer;
}

.nf-predict-icon {
  width: 64px;
  height: 64px;
  margin: 0 auto 16px;
  border-radius: 50%;
  background: var(--nf-bg-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--nf-font-data);
  font-size: 1.4rem;
  color: var(--nf-accent-green);
  border: 2px solid var(--nf-accent-green);
}

.nf-predict-numbers {
  font-family: var(--nf-font-data);
  font-size: 1.6rem;
  color: var(--nf-accent-amber);
  margin: 12px 0;
  letter-spacing: 2px;
}

.nf-predict-rate {
  font-size: 0.85rem;
  color: var(--nf-accent-green);
}

/* --- Community BBS (Module 8) --- */
.nf-bbs-container {
  display: grid;
  grid-template-columns: 2fr 1fr;
  gap: 24px;
}

.nf-bbs-list {
  background: var(--nf-bg-secondary);
  border: 1px solid var(--nf-border);
  border-radius: var(--nf-radius-panel);
  font-family: var(--nf-font-title);
  max-height: 400px;
  overflow-y: auto;
}

.nf-bbs-item {
  padding: 12px 16px;
  border-bottom: 1px solid var(--nf-border);
  display: flex;
  gap: 12px;
  align-items: baseline;
  font-size: 0.9rem;
}

.nf-bbs-item:hover {
  background: var(--nf-bg-card);
}

.nf-bbs-author {
  color: var(--nf-accent-amber);
  min-width: 80px;
  font-size: 0.8rem;
}

.nf-bbs-title-text {
  color: var(--nf-text-primary);
  flex: 1;
}

.nf-bbs-time {
  color: var(--nf-text-dim);
  font-size: 0.75rem;
  min-width: 60px;
  text-align: right;
}

.nf-tag-cloud {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  padding: 16px;
}

.nf-tag {
  padding: 6px 14px;
  background: var(--nf-bg-card);
  border: 1px solid var(--nf-border);
  border-radius: 2px;
  font-size: 0.85rem;
  color: var(--nf-text-secondary);
  cursor: pointer;
  transition: all 0.2s ease;
}

.nf-tag:hover {
  border-color: var(--nf-accent-green);
  color: var(--nf-accent-green);
}

/* --- Algorithm Lab (Module 9) --- */
.nf-algo-list {
  display: flex;
  flex-direction: column;
  gap: 16px;
}

.nf-algo-item {
  display: grid;
  grid-template-columns: 1fr auto auto;
  gap: 16px;
  align-items: center;
  padding: 20px;
}

.nf-algo-name {
  font-family: var(--nf-font-title);
  color: var(--nf-accent-green);
  font-size: 1.05rem;
}

.nf-algo-status {
  padding: 4px 12px;
  border-radius: 2px;
  font-size: 0.8rem;
  font-family: var(--nf-font-title);
}

.nf-status-testing {
  background: rgba(255, 191, 0, 0.15);
  color: var(--nf-accent-amber);
  border: 1px solid var(--nf-accent-amber);
}

.nf-status-online {
  background: rgba(57, 255, 20, 0.1);
  color: var(--nf-accent-green);
  border: 1px solid var(--nf-accent-green);
}

.nf-algo-accuracy {
  font-family: var(--nf-font-data);
  color: var(--nf-accent-amber);
  font-size: 1.1rem;
}

/* --- Certification (Module 10) --- */
.nf-cert-grid {
  display: flex;
  justify-content: center;
  gap: 32px;
  flex-wrap: wrap;
}

.nf-cert-item {
  text-align: center;
  width: 140px;
  cursor: pointer;
}

.nf-cert-item img {
  width: 80px;
  height: 80px;
  margin: 0 auto 12px;
  border-radius: 50%;
  filter: grayscale(100%);
  transition: filter 0.3s ease, transform 0.3s ease;
}

.nf-cert-item:hover img {
  filter: grayscale(0%);
  transform: scale(1.1);
}

.nf-cert-name {
  font-size: 0.8rem;
  color: var(--nf-text-secondary);
  line-height: 1.4;
}

/* --- Button --- */
.nf-btn {
  display: inline-block;
  padding: 12px 28px;
  background: var(--nf-accent-green);
  color: var(--nf-bg-primary);
  font-family: var(--nf-font-title);
  font-weight: bold;
  font-size: 0.9rem;
  border: none;
  border-radius: var(--nf-radius-btn);
  cursor: pointer;
  transition: all 0.3s ease;
  letter-spacing: 1px;
}

.nf-btn:hover {
  background: var(--nf-accent-amber);
  color: var(--nf-bg-primary);
  box-shadow: 0 0 15px rgba(255, 191, 0, 0.3);
}

.nf-btn-outline {
  background: transparent;
  border: 1px solid var(--nf-accent-green);
  color: var(--nf-accent-green);
}

.nf-btn-outline:hover {
  background: var(--nf-accent-green);
  color: var(--nf-bg-primary);
}

.nf-btn-pulse {
  animation: nf-btn-glow 2s ease-in-out infinite;
}

@keyframes nf-btn-glow {
  0%, 100% { box-shadow: 0 0 5px rgba(57, 255, 20, 0.3); }
  50% { box-shadow: 0 0 20px rgba(57, 255, 20, 0.6); }
}

/* --- Footer --- */
#nf-footer {
  background: var(--nf-bg-secondary);
  border-top: 1px solid var(--nf-border);
  padding: 48px 0 0;
}

.nf-footer-grid {
  display: grid;
  grid-template-columns: 1.5fr 1fr 1fr;
  gap: 40px;
  padding-bottom: 40px;
}

.nf-footer-brand img {
  width: 40px;
  height: 40px;
  margin-bottom: 12px;
}

.nf-footer-slogan {
  font-family: var(--nf-font-title);
  color: var(--nf-accent-green);
  font-size: 0.95rem;
  margin-bottom: 12px;
}

.nf-footer-copyright {
  font-size: 0.8rem;
  color: var(--nf-text-dim);
  line-height: 1.8;
}

.nf-footer-title {
  font-family: var(--nf-font-title);
  color: var(--nf-accent-green);
  font-size: 1rem;
  margin-bottom: 16px;
}

.nf-footer-links {
  list-style: none;
}

.nf-footer-links li {
  margin-bottom: 8px;
}

.nf-footer-links a {
  color: var(--nf-text-secondary);
  font-size: 0.88rem;
  transition: color 0.2s ease;
}

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

.nf-footer-bottom {
  border-top: 1px solid var(--nf-border);
  padding: 24px 0;
}

.nf-footer-badges {
  display: flex;
  justify-content: center;
  gap: 40px;
  flex-wrap: wrap;
}

.nf-footer-badge {
  text-align: center;
  cursor: pointer;
}

.nf-footer-badge img {
  width: 48px;
  height: 48px;
  margin: 0 auto 8px;
  border-radius: 50%;
  filter: grayscale(100%);
  transition: filter 0.3s ease;
}

.nf-footer-badge:hover img {
  filter: grayscale(0%);
}

.nf-footer-badge-text {
  font-size: 0.7rem;
  color: var(--nf-text-dim);
  max-width: 100px;
  line-height: 1.3;
}

/* --- Hash Decoder Page --- */
.nf-decoder-form {
  max-width: 700px;
  margin: 0 auto;
  padding: 32px;
  background: var(--nf-bg-card);
  border: 1px solid var(--nf-border);
  border-radius: var(--nf-radius-card);
}

.nf-form-group {
  margin-bottom: 20px;
}

.nf-form-label {
  display: block;
  font-family: var(--nf-font-title);
  color: var(--nf-accent-green);
  font-size: 0.9rem;
  margin-bottom: 8px;
}

.nf-form-input {
  width: 100%;
  padding: 12px 16px;
  background: var(--nf-bg-secondary);
  border: 1px solid var(--nf-border);
  border-radius: var(--nf-radius-btn);
  color: var(--nf-text-primary);
  font-family: var(--nf-font-data);
  font-size: 0.95rem;
  transition: border-color 0.2s ease;
}

.nf-form-input:focus {
  outline: none;
  border-color: var(--nf-accent-green);
  box-shadow: 0 0 8px rgba(57, 255, 20, 0.2);
}

.nf-decoder-result {
  max-width: 700px;
  margin: 24px auto 0;
  padding: 24px;
  background: var(--nf-bg-secondary);
  border: 1px solid var(--nf-border);
  border-radius: var(--nf-radius-panel);
  font-family: var(--nf-font-data);
  min-height: 100px;
  display: none;
}

.nf-result-success {
  color: var(--nf-accent-green);
}

.nf-result-fail {
  color: var(--nf-accent-red);
}

/* --- Inner Page Content --- */
.nf-page-hero {
  background: var(--nf-bg-secondary);
  padding: 48px 0;
  text-align: center;
  border-bottom: 1px solid var(--nf-border);
}

.nf-page-content {
  padding: 48px 0;
}

.nf-page-content article {
  max-width: 900px;
  margin: 0 auto;
}

.nf-page-content article p {
  margin-bottom: 20px;
  line-height: 1.9;
  font-size: 1rem;
}

.nf-page-content article h2 {
  margin-top: 40px;
  margin-bottom: 16px;
  padding-bottom: 8px;
  border-bottom: 1px solid var(--nf-border);
}

.nf-page-content article h3 {
  margin-top: 28px;
  margin-bottom: 12px;
}

.nf-page-content article img {
  margin: 24px auto;
  border-radius: var(--nf-radius-card);
  border: 1px solid var(--nf-border);
}

/* --- Data Table --- */
.nf-data-table {
  width: 100%;
  border-collapse: collapse;
  font-family: var(--nf-font-data);
  font-size: 0.88rem;
}

.nf-data-table th {
  background: var(--nf-bg-secondary);
  color: var(--nf-accent-green);
  padding: 12px 16px;
  text-align: left;
  border-bottom: 2px solid var(--nf-accent-green);
  font-weight: normal;
}

.nf-data-table td {
  padding: 10px 16px;
  border-bottom: 1px solid var(--nf-border);
  color: var(--nf-text-primary);
}

.nf-data-table tr:hover td {
  background: var(--nf-bg-card);
}

/* --- Comments Section --- */
.nf-comments {
  max-width: 900px;
  margin: 40px auto 0;
  padding-top: 32px;
  border-top: 1px solid var(--nf-border);
}

.nf-comment {
  display: flex;
  gap: 16px;
  padding: 16px 0;
  border-bottom: 1px solid var(--nf-border);
}

.nf-comment-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--nf-radius-avatar);
  background: var(--nf-bg-card);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--nf-font-title);
  color: var(--nf-accent-green);
  font-size: 0.9rem;
  flex-shrink: 0;
}

.nf-comment-body {
  flex: 1;
}

.nf-comment-header {
  display: flex;
  gap: 12px;
  align-items: center;
  margin-bottom: 8px;
}

.nf-comment-name {
  font-family: var(--nf-font-title);
  color: var(--nf-accent-amber);
  font-size: 0.9rem;
}

.nf-comment-rank {
  font-size: 0.7rem;
  padding: 2px 8px;
  background: rgba(57, 255, 20, 0.1);
  color: var(--nf-accent-green);
  border-radius: 2px;
}

.nf-comment-date {
  font-size: 0.75rem;
  color: var(--nf-text-dim);
}

.nf-comment-text {
  font-size: 0.9rem;
  color: var(--nf-text-secondary);
  line-height: 1.7;
}

.nf-comment-actions {
  display: flex;
  gap: 16px;
  margin-top: 8px;
}

.nf-comment-action {
  font-size: 0.8rem;
  color: var(--nf-text-dim);
  cursor: pointer;
  background: none;
  border: none;
  font-family: var(--nf-font-body);
}

.nf-comment-action:hover {
  color: var(--nf-accent-green);
}

/* --- APP Download Page --- */
.nf-app-hero {
  min-height: 100vh;
  display: flex;
  align-items: center;
  justify-content: center;
  position: relative;
  overflow: hidden;
  padding: 80px 24px;
}

.nf-app-content {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: center;
  max-width: 1100px;
}

.nf-app-info h2 {
  font-size: 2.2rem;
  margin-bottom: 8px;
}

.nf-app-slogan {
  font-size: 1.1rem;
  color: var(--nf-accent-amber);
  margin-bottom: 24px;
  font-family: var(--nf-font-title);
}

.nf-app-features {
  list-style: none;
  margin-bottom: 32px;
}

.nf-app-features li {
  padding: 8px 0;
  color: var(--nf-text-secondary);
  font-size: 0.95rem;
  position: relative;
  padding-left: 24px;
}

.nf-app-features li::before {
  content: '>';
  position: absolute;
  left: 0;
  color: var(--nf-accent-green);
  font-family: var(--nf-font-title);
}

.nf-app-downloads {
  display: flex;
  gap: 24px;
}

.nf-app-qr {
  text-align: center;
}

.nf-app-qr img {
  width: 120px;
  height: 120px;
  border: 2px solid var(--nf-border);
  border-radius: 4px;
}

.nf-app-qr-label {
  font-size: 0.8rem;
  color: var(--nf-text-dim);
  margin-top: 8px;
}

.nf-app-mockup {
  text-align: center;
}

.nf-app-mockup img {
  max-height: 500px;
  margin: 0 auto;
  filter: drop-shadow(0 0 30px rgba(57, 255, 20, 0.2));
}

/* --- Scrollbar --- */
::-webkit-scrollbar {
  width: 6px;
  height: 6px;
}

::-webkit-scrollbar-track {
  background: var(--nf-bg-secondary);
}

::-webkit-scrollbar-thumb {
  background: var(--nf-border);
  border-radius: 3px;
}

::-webkit-scrollbar-thumb:hover {
  background: var(--nf-accent-green);
}

/* ============================================
   Responsive Breakpoints (Mobile-First)
   - 480px: Small phones
   - 768px: Tablets
   - 1024px: Desktop small
   - 1280px: Desktop large
   ============================================ */

@media (max-width: 1024px) {
  .nf-nav-links {
    display: none;
  }
  .nf-hamburger {
    display: block;
  }
  .nf-mobile-nav {
    display: block;
  }
  .nf-articles-grid {
    grid-template-columns: repeat(2, 1fr);
  }
  .nf-footer-grid {
    grid-template-columns: 1fr 1fr;
  }
  .nf-bbs-container {
    grid-template-columns: 1fr;
  }
}

@media (max-width: 768px) {
  h1 { font-size: 1.6rem; }
  h2 { font-size: 1.4rem; }
  h3 { font-size: 1.2rem; }

  #nf-banner {
    height: 45vh;
  }

  .nf-slide-title {
    font-size: 1.5rem;
  }

  .nf-slide-desc {
    font-size: 0.9rem;
  }

  .nf-articles-grid {
    grid-template-columns: 1fr;
  }

  .nf-countdown-timer {
    font-size: 2.8rem;
    letter-spacing: 4px;
  }

  .nf-footer-grid {
    grid-template-columns: 1fr;
    gap: 24px;
  }

  .nf-app-content {
    grid-template-columns: 1fr;
    text-align: center;
  }

  .nf-app-downloads {
    justify-content: center;
  }

  .nf-heatmap-grid {
    grid-template-columns: repeat(7, 1fr);
    gap: 4px;
  }

  .nf-heatmap-cell {
    font-size: 0.85rem;
  }

  .nf-cert-grid {
    gap: 20px;
  }

  .nf-cert-item {
    width: 100px;
  }

  .nf-footer-badges {
    gap: 20px;
  }

  .nf-algo-item {
    grid-template-columns: 1fr;
    gap: 8px;
  }
}

@media (max-width: 480px) {
  .nf-container {
    padding: 0 16px;
  }

  .nf-section {
    padding: 32px 0;
  }

  .nf-countdown-timer {
    font-size: 2rem;
    letter-spacing: 2px;
  }

  .nf-draw-card {
    min-width: 240px;
  }

  .nf-predict-grid {
    grid-template-columns: 1fr;
  }

  .nf-app-downloads {
    flex-direction: column;
    align-items: center;
  }
}