/* ===================================
   GrimoChat LP - Stylesheet
   =================================== */

:root {
  --color-primary: #009B8D;
  --color-primary-dark: #007A6E;
  --color-primary-light: #E6F7F5;
  --color-secondary: #1A2E44;
  --color-accent: #FF6B35;
  --color-text: #1A2E44;
  --color-text-muted: #6B7A8D;
  --color-bg: #FFFFFF;
  --color-bg-light: #F7FAFA;
  --color-bg-section: #F0F9F8;
  --color-border: #E0EDEB;
  --color-white: #FFFFFF;
  --font-family: 'Noto Sans JP', 'Hiragino Kaku Gothic ProN', 'Yu Gothic', sans-serif;
  --font-size-base: 16px;
  --border-radius: 12px;
  --border-radius-sm: 6px;
  --shadow: 0 4px 24px rgba(0, 155, 141, 0.10);
  --shadow-lg: 0 8px 40px rgba(0, 0, 0, 0.12);
  --transition: 0.3s ease;
  --max-width: 1120px;
}

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

html {
  scroll-behavior: smooth;
  font-size: var(--font-size-base);
}

body {
  font-family: var(--font-family);
  color: var(--color-text);
  background: var(--color-bg);
  line-height: 1.75;
  -webkit-font-smoothing: antialiased;
}

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

/* ===== LAYOUT ===== */
.container {
  max-width: var(--max-width);
  margin: 0 auto;
  padding: 0 24px;
}

section {
  padding: 80px 0;
}

/* ===== HEADER ===== */
.site-header {
  position: sticky;
  top: 0;
  z-index: 100;
  background: rgba(255,255,255,0.95);
  backdrop-filter: blur(8px);
  border-bottom: 1px solid var(--color-border);
}

.header-inner {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 72px;
}

.logo {
  font-size: 1.5rem;
  font-weight: 800;
  color: #111;
  letter-spacing: -0.02em;
}

.logo span {
  color: inherit;
}

.header-nav {
  display: flex;
  align-items: center;
  gap: 32px;
}

.nav-links {
  display: flex;
  gap: 28px;
}

.nav-links a {
  font-size: 0.9rem;
  font-weight: 500;
  color: var(--color-text-muted);
  transition: color var(--transition);
}

.nav-links a:hover {
  color: var(--color-primary);
}

.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
  padding: 12px 28px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  transition: all var(--transition);
  border: none;
  text-decoration: none;
  white-space: nowrap;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-white);
}

.btn-primary:hover {
  background: var(--color-primary-dark);
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(0, 155, 141, 0.4);
}

.btn-secondary {
  background: transparent;
  color: var(--color-primary);
  border: 2px solid var(--color-primary);
}

.btn-secondary:hover {
  background: var(--color-primary-light);
  transform: translateY(-2px);
}

.btn-accent {
  background: var(--color-accent);
  color: var(--color-white);
}

.btn-accent:hover {
  background: #E55A28;
  transform: translateY(-2px);
  box-shadow: 0 6px 20px rgba(255, 107, 53, 0.4);
}

.btn-lg {
  padding: 16px 40px;
  font-size: 1.05rem;
}

.btn-sm {
  padding: 8px 20px;
  font-size: 0.85rem;
}

/* ===== HERO SECTION ===== */
.hero {
  background: linear-gradient(135deg, #F0F9F8 0%, #E6F7F5 40%, #F7FAFA 100%);
  padding: 80px 0 100px;
  overflow: hidden;
  position: relative;
}

.hero::before {
  content: '';
  position: absolute;
  top: -120px;
  right: -120px;
  width: 500px;
  height: 500px;
  border-radius: 50%;
  background: rgba(0, 155, 141, 0.08);
}

.hero::after {
  content: '';
  position: absolute;
  bottom: -80px;
  right: 10%;
  width: 300px;
  height: 300px;
  border-radius: 50%;
  background: rgba(0, 155, 141, 0.05);
}

.hero-inner {
  display: flex;
  flex-direction: column;
  align-items: center;
  text-align: center;
  position: relative;
  z-index: 1;
  max-width: 800px;
  margin: 0 auto;
}

.hero-badge {
  display: inline-flex;
  flex-direction: column;
  align-items: center;
  gap: 4px;
  background: var(--color-primary-light);
  border: 1.5px solid var(--color-primary);
  color: var(--color-primary-dark);
  padding: 10px 24px;
  border-radius: 50px;
  margin-bottom: 24px;
}

.hero-badge-service {
  font-size: 0.78rem;
  font-weight: 700;
  letter-spacing: 0.06em;
}

.hero-badge-name {
  font-size: 1.05rem;
  font-weight: 900;
  letter-spacing: 0.04em;
  color: var(--color-secondary);
}

.hero-reading {
  font-size: 0.85em;
  font-weight: 500;
  color: var(--color-text-muted);
}

.hero-title {
  font-size: 2.8rem;
  font-weight: 900;
  line-height: 1.3;
  color: var(--color-secondary);
  letter-spacing: -0.02em;
  margin-bottom: 24px;
}

.hero-title .highlight {
  color: var(--color-primary);
  position: relative;
}

.hero-subtitle {
  font-size: 1.1rem;
  color: var(--color-text-muted);
  margin-bottom: 36px;
  line-height: 1.8;
}

.hero-ctas {
  display: flex;
  flex-wrap: wrap;
  justify-content: center;
  gap: 16px;
  margin-bottom: 48px;
}

.hero-stats {
  display: flex;
  gap: 32px;
}

.stat-item {
  text-align: center;
}

.stat-number {
  font-size: 2rem;
  font-weight: 900;
  color: var(--color-primary);
  line-height: 1;
}

.stat-label {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  margin-top: 4px;
}

/* ===== SCREENSHOT CAROUSEL ===== */
.section-screenshots {
  background: var(--color-bg-light);
}

.ss-carousel {
  position: relative;
  max-width: 960px;
  margin: 0 auto;
  padding: 0 48px;
}

.ss-carousel-track-wrap {
  overflow: hidden;
  border-radius: 16px;
  box-shadow: var(--shadow-lg);
  border: 1px solid var(--color-border);
  background: var(--color-secondary);
}

.ss-carousel-track {
  display: flex;
  transition: transform 0.45s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}

.ss-carousel-slide {
  min-width: 100%;
}

.ss-frame {
  display: block;
  position: relative;
  margin: 0;
  line-height: 0;
}

.ss-frame img {
  width: 100%;
  height: auto;
  display: block;
  /* aspect-ratio: 16 / 9; */
  object-fit: cover;
}

.ss-frame figcaption {
  position: absolute;
  bottom: 0;
  left: 0;
  right: 0;
  background: rgba(26, 46, 68, 0.88);
  color: white;
  text-align: center;
  padding: 12px 24px;
  font-size: 0.9rem;
  line-height: 1.5;
  backdrop-filter: blur(4px);
}

.ss-carousel-btn {
  position: absolute;
  top: 50%;
  transform: translateY(-50%);
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: white;
  border: 1px solid var(--color-border);
  box-shadow: var(--shadow);
  cursor: pointer;
  font-size: 1.6rem;
  color: var(--color-secondary);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 10;
  transition: var(--transition);
  line-height: 1;
  padding: 0 0 2px;
}

.ss-carousel-btn:hover {
  background: var(--color-primary);
  color: white;
  border-color: var(--color-primary);
}

.ss-carousel-prev { left: 0; }
.ss-carousel-next { right: 0; }

.ss-carousel-dots {
  display: flex;
  justify-content: center;
  gap: 8px;
  margin-top: 24px;
}

.ss-dot {
  width: 10px;
  height: 10px;
  border-radius: 50%;
  background: var(--color-border);
  border: none;
  cursor: pointer;
  transition: var(--transition);
  padding: 0;
}

.ss-dot.active {
  background: var(--color-primary);
  transform: scale(1.3);
}

@media (max-width: 640px) {
  .ss-carousel { padding: 0 36px; }
  .ss-carousel-btn { width: 36px; height: 36px; font-size: 1.3rem; }
  .ss-frame figcaption { font-size: 0.8rem; padding: 8px 16px; }
}

/* ===== SECTION HEADER ===== */
.section-header {
  text-align: center;
  margin-bottom: 60px;
}

.section-tag {
  display: inline-block;
  background: var(--color-primary-light);
  color: var(--color-primary);
  padding: 4px 16px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 16px;
  letter-spacing: 0.05em;
}

.section-title {
  font-size: 2rem;
  font-weight: 900;
  color: var(--color-secondary);
  line-height: 1.35;
  letter-spacing: -0.02em;
}

.section-desc {
  font-size: 1rem;
  color: var(--color-text-muted);
  margin-top: 16px;
  max-width: 600px;
  margin-left: auto;
  margin-right: auto;
}

/* ===== PROBLEMS SECTION ===== */
.section-problems {
  background: var(--color-bg);
}

.problems-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.problem-card {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 28px;
  position: relative;
  overflow: hidden;
  transition: box-shadow var(--transition);
}

.problem-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  width: 4px;
  height: 100%;
}

.problem-card:nth-child(1)::before { background: #FF6B35; }
.problem-card:nth-child(2)::before { background: #F59E0B; }
.problem-card:nth-child(3)::before { background: #6366F1; }
.problem-card:nth-child(4)::before { background: #009B8D; }

.problem-card:hover {
  box-shadow: var(--shadow);
}

.problem-icon {
  font-size: 1.8rem;
  margin-bottom: 12px;
}

.problem-title {
  font-size: 1.05rem;
  font-weight: 700;
  color: var(--color-secondary);
  margin-bottom: 10px;
}

.problem-desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ===== ABOUT SECTION ===== */
.section-about {
  background: var(--color-bg-section);
}

.about-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 60px;
  align-items: center;
}

.about-content {}

.about-lead {
  font-size: 1.2rem;
  font-weight: 700;
  color: var(--color-secondary);
  margin-bottom: 20px;
  line-height: 1.6;
  border-left: 4px solid var(--color-primary);
  padding-left: 20px;
}

.about-desc {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  line-height: 1.8;
  margin-bottom: 16px;
}

.about-sources {
  display: flex;
  gap: 16px;
  margin-top: 28px;
  flex-wrap: wrap;
}

.source-chip {
  display: flex;
  align-items: center;
  gap: 8px;
  background: white;
  border: 1px solid var(--color-border);
  border-radius: 8px;
  padding: 10px 16px;
  font-size: 0.85rem;
  font-weight: 600;
  color: var(--color-text);
}

.source-chip .icon { font-size: 1.1rem; }

.about-visual {
  background: white;
  border-radius: 16px;
  padding: 32px;
  box-shadow: var(--shadow);
  border: 1px solid var(--color-border);
}

.rag-flow {
  display: flex;
  align-items: center;
  gap: 12px;
  margin-bottom: 24px;
}

.rag-step {
  flex: 1;
  text-align: center;
}

.rag-step-num {
  width: 48px;
  height: 48px;
  background: var(--color-primary);
  color: white;
  border-radius: 50%;
  font-size: 1.2rem;
  font-weight: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 10px;
}

.rag-step-label {
  font-size: 0.8rem;
  font-weight: 700;
  color: var(--color-secondary);
  margin-bottom: 4px;
}

.rag-step-desc {
  font-size: 0.75rem;
  color: var(--color-text-muted);
}

.rag-arrow {
  color: var(--color-primary);
  font-size: 1.4rem;
  flex-shrink: 0;
}

.rag-note {
  background: var(--color-primary-light);
  border-radius: 8px;
  padding: 14px 18px;
  font-size: 0.85rem;
  color: var(--color-primary-dark);
  font-weight: 600;
  text-align: center;
}

/* ===== FEATURES SECTION ===== */
.section-features {
  background: var(--color-bg);
}

.features-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 24px;
}

.feature-card {
  background: white;
  border: 1px solid var(--color-border);
  border-radius: var(--border-radius);
  padding: 32px 28px;
  transition: all var(--transition);
  position: relative;
  overflow: hidden;
}

.feature-card::after {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 3px;
  background: var(--color-primary);
  transform: scaleX(0);
  transition: transform var(--transition);
}

.feature-card:hover::after {
  transform: scaleX(1);
}

.feature-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-4px);
}

.feature-icon {
  width: 52px;
  height: 52px;
  background: var(--color-primary-light);
  border-radius: 12px;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.5rem;
  margin-bottom: 18px;
}

.feature-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-secondary);
  margin-bottom: 10px;
}

.feature-desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ===== USE CASES SECTION ===== */
.section-usecases {
  background: var(--color-bg-section);
}

.usecases-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 20px;
}

.usecase-card {
  background: white;
  border-radius: var(--border-radius);
  padding: 28px;
  border: 1px solid var(--color-border);
  transition: all var(--transition);
}

.usecase-card:hover {
  box-shadow: var(--shadow);
  transform: translateY(-3px);
}

.usecase-icon {
  font-size: 1.8rem;
  margin-bottom: 12px;
}

.usecase-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-secondary);
  margin-bottom: 10px;
}

.usecase-desc {
  font-size: 0.875rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

/* ===== SECURITY SECTION ===== */
.section-security {
  background: var(--color-secondary);
  color: white;
}

.section-security .section-title {
  color: white;
}

.section-security .section-desc {
  color: rgba(255,255,255,0.7);
}

.section-security .section-tag {
  background: rgba(0,155,141,0.3);
  color: #7FFFD4;
}

.security-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 24px;
}

.security-card {
  background: rgba(255,255,255,0.06);
  border: 1px solid rgba(255,255,255,0.12);
  border-radius: var(--border-radius);
  padding: 28px;
  transition: background var(--transition);
}

.security-card:hover {
  background: rgba(255,255,255,0.1);
}

.security-icon {
  font-size: 1.8rem;
  margin-bottom: 14px;
}

.security-title {
  font-size: 1rem;
  font-weight: 700;
  color: white;
  margin-bottom: 10px;
}

.security-desc {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.7);
  line-height: 1.7;
}

/* ===== STEPS SECTION ===== */
.section-steps {
  background: var(--color-bg);
}

.steps-list {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 0;
  position: relative;
}

.steps-list::before {
  content: '';
  position: absolute;
  top: 48px;
  left: calc(12.5% + 24px);
  right: calc(12.5% + 24px);
  height: 2px;
  background: var(--color-primary);
  z-index: 0;
}

.step-item {
  text-align: center;
  padding: 0 16px;
  position: relative;
  z-index: 1;
}

.step-num {
  width: 96px;
  height: 96px;
  background: var(--color-primary);
  color: white;
  border-radius: 50%;
  font-size: 2rem;
  font-weight: 900;
  display: flex;
  align-items: center;
  justify-content: center;
  margin: 0 auto 20px;
  box-shadow: 0 4px 16px rgba(0,155,141,0.35);
}

.step-title {
  font-size: 1rem;
  font-weight: 700;
  color: var(--color-secondary);
  margin-bottom: 10px;
}

.step-desc {
  font-size: 0.85rem;
  color: var(--color-text-muted);
  line-height: 1.7;
}

.steps-note {
  text-align: center;
  margin-top: 48px;
  background: var(--color-primary-light);
  border-radius: var(--border-radius);
  padding: 20px 32px;
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-primary-dark);
  display: inline-block;
  margin-left: auto;
  margin-right: auto;
  width: 100%;
  max-width: 640px;
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 8px;
}

/* ===== MONITOR SECTION ===== */
.section-monitor {
  background: linear-gradient(135deg, #E6F7F5 0%, #F0F9F8 100%);
}

.monitor-inner {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 48px;
  align-items: start;
}

.monitor-badge {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  background: var(--color-accent);
  color: white;
  padding: 6px 16px;
  border-radius: 50px;
  font-size: 0.8rem;
  font-weight: 700;
  margin-bottom: 16px;
}

.monitor-title {
  font-size: 1.6rem;
  font-weight: 900;
  color: var(--color-secondary);
  margin-bottom: 16px;
  line-height: 1.4;
}

.monitor-desc {
  font-size: 0.95rem;
  color: var(--color-text-muted);
  margin-bottom: 28px;
  line-height: 1.8;
}

.monitor-benefits {
  display: flex;
  flex-direction: column;
  gap: 12px;
}

.benefit-item {
  display: flex;
  align-items: flex-start;
  gap: 12px;
}

.benefit-check {
  width: 24px;
  height: 24px;
  background: var(--color-primary);
  color: white;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.75rem;
  flex-shrink: 0;
  margin-top: 2px;
}

.benefit-text {
  font-size: 0.95rem;
  font-weight: 600;
  color: var(--color-secondary);
}

.monitor-disclaimer {
  background: rgba(255,255,255,0.8);
  border: 1px solid #FDE68A;
  border-radius: var(--border-radius);
  padding: 24px;
}

.disclaimer-title {
  font-size: 0.9rem;
  font-weight: 700;
  color: #92400E;
  margin-bottom: 12px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.disclaimer-list {
  display: flex;
  flex-direction: column;
  gap: 8px;
}

.disclaimer-list li {
  font-size: 0.85rem;
  color: #78350F;
  padding-left: 16px;
  position: relative;
  line-height: 1.6;
}

.disclaimer-list li::before {
  content: '・';
  position: absolute;
  left: 0;
}

/* ===== CTA FORM SECTION ===== */
.section-cta {
  background: var(--color-bg);
  padding: 80px 0;
}

.cta-tabs {
  display: flex;
  justify-content: center;
  gap: 12px;
  margin-bottom: 48px;
  flex-wrap: wrap;
}

.cta-tab {
  padding: 12px 32px;
  border-radius: 50px;
  font-size: 0.95rem;
  font-weight: 700;
  cursor: pointer;
  border: 2px solid var(--color-border);
  background: white;
  color: var(--color-text-muted);
  transition: all var(--transition);
}

.cta-tab.active, .cta-tab:hover {
  border-color: var(--color-primary);
  background: var(--color-primary);
  color: white;
}

.contact-form-wrap {
  max-width: 680px;
  margin: 0 auto;
  background: white;
  border: 1px solid var(--color-border);
  border-radius: 20px;
  padding: 48px;
  box-shadow: var(--shadow-lg);
}

.form-title {
  font-size: 1.4rem;
  font-weight: 900;
  color: var(--color-secondary);
  margin-bottom: 8px;
  text-align: center;
}

.form-subtitle {
  font-size: 0.9rem;
  color: var(--color-text-muted);
  text-align: center;
  margin-bottom: 32px;
}

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

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--color-secondary);
  margin-bottom: 8px;
}

.form-label .required {
  color: var(--color-accent);
  margin-left: 4px;
  font-size: 0.75rem;
}

.form-input, .form-textarea, .form-select {
  width: 100%;
  padding: 12px 16px;
  border: 1.5px solid var(--color-border);
  border-radius: 8px;
  font-size: 0.95rem;
  font-family: var(--font-family);
  color: var(--color-text);
  transition: border-color var(--transition);
  background: white;
}

.form-input:focus, .form-textarea:focus, .form-select:focus {
  outline: none;
  border-color: var(--color-primary);
  box-shadow: 0 0 0 3px rgba(0,155,141,0.1);
}

.form-textarea {
  min-height: 120px;
  resize: vertical;
}

.form-row {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: 16px;
}

.form-submit {
  width: 100%;
  padding: 16px;
  font-size: 1.05rem;
  font-weight: 700;
  border-radius: 50px;
  border: none;
  cursor: pointer;
  transition: all var(--transition);
}

.form-note {
  font-size: 0.8rem;
  color: var(--color-text-muted);
  text-align: center;
  margin-top: 16px;
}

.form-note a {
  color: var(--color-primary);
  text-decoration: underline;
}

/* Form states */
.form-success {
  display: none;
  text-align: center;
  padding: 32px;
}

.form-success.show {
  display: block;
}

.form-success-icon {
  font-size: 3rem;
  margin-bottom: 16px;
}

.form-success-title {
  font-size: 1.3rem;
  font-weight: 700;
  color: var(--color-secondary);
  margin-bottom: 8px;
}

.form-success-desc {
  font-size: 0.9rem;
  color: var(--color-text-muted);
}

/* ===== FOOTER ===== */
.site-footer {
  background: var(--color-secondary);
  color: white;
  padding: 48px 0 24px;
}

.footer-inner {
  display: grid;
  grid-template-columns: 2fr 1fr 1fr;
  gap: 48px;
  padding-bottom: 40px;
  border-bottom: 1px solid rgba(255,255,255,0.1);
  margin-bottom: 24px;
}

.footer-brand .logo {
  color: white;
  font-size: 1.4rem;
  margin-bottom: 12px;
  display: block;
}

.footer-brand .logo span { color: var(--color-primary); }

.footer-tagline {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.6);
  line-height: 1.7;
  margin-bottom: 20px;
}

.footer-contact-link {
  display: flex;
  align-items: center;
  gap: 8px;
  font-size: 0.875rem;
  color: rgba(255,255,255,0.8);
}

.footer-links-title {
  font-size: 0.85rem;
  font-weight: 700;
  color: rgba(255,255,255,0.5);
  text-transform: uppercase;
  letter-spacing: 0.05em;
  margin-bottom: 16px;
}

.footer-links {
  display: flex;
  flex-direction: column;
  gap: 10px;
}

.footer-links a {
  font-size: 0.875rem;
  color: rgba(255,255,255,0.7);
  transition: color var(--transition);
}

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

.footer-bottom {
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  color: rgba(255,255,255,0.4);
}

/* ===== UTILITIES ===== */
.text-center { text-align: center; }
.mt-8 { margin-top: 8px; }
.mt-16 { margin-top: 16px; }
.mt-24 { margin-top: 24px; }
.mt-32 { margin-top: 32px; }
.mb-8 { margin-bottom: 8px; }
.mb-16 { margin-bottom: 16px; }

/* Error message */
.error-msg {
  color: #dc2626;
  font-size: 0.8rem;
  margin-top: 4px;
  display: none;
}

.error-msg.show { display: block; }

.loading-spinner {
  display: none;
  width: 20px;
  height: 20px;
  border: 2px solid rgba(255,255,255,0.4);
  border-top-color: white;
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

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

.btn.loading .loading-spinner { display: inline-block; }
.btn.loading .btn-text { display: none; }

/* ===== RESPONSIVE ===== */
@media (max-width: 900px) {
  section { padding: 60px 0; }

  .hero-title { font-size: 2rem; }

  .about-inner { grid-template-columns: 1fr; }
  .problems-grid { grid-template-columns: 1fr; }
  .features-grid { grid-template-columns: repeat(2, 1fr); }
  .usecases-grid { grid-template-columns: repeat(2, 1fr); }
  .security-grid { grid-template-columns: 1fr; }
  .steps-list { grid-template-columns: repeat(2, 1fr); gap: 32px; }
  .steps-list::before { display: none; }
  .monitor-inner { grid-template-columns: 1fr; }
  .footer-inner { grid-template-columns: 1fr; gap: 32px; }

  .nav-links { display: none; }

  .contact-form-wrap { padding: 32px 24px; }
  .form-row { grid-template-columns: 1fr; }
}

@media (max-width: 600px) {
  .features-grid { grid-template-columns: 1fr; }
  .usecases-grid { grid-template-columns: 1fr; }
  .steps-list { grid-template-columns: 1fr; }
  .hero-ctas { flex-direction: column; }
  .hero-stats { flex-direction: column; gap: 16px; }
  .section-title { font-size: 1.6rem; }
  .hero-title { font-size: 1.75rem; }
}