/* ==========================================================================
   TUNE STUDIO (tunestudio.pl) - GŁÓWNY ARKUSZ STYLÓW
   Ultra-lekki, nowoczesny, ciemny styl agencyjny z akcentami neonowymi
   ========================================================================== */

:root {
  --bg-primary: #090B0E;
  --bg-secondary: #11141A;
  --bg-card: rgba(17, 20, 26, 0.75);
  --bg-card-hover: rgba(26, 31, 41, 0.85);
  --border-color: rgba(255, 255, 255, 0.08);
  --border-focus: #00F5A0;

  --text-primary: #F8FAFC;
  --text-secondary: #94A3B8;
  --text-muted: #64748B;

  --accent-green: #00F5A0;
  --accent-cyan: #00D9F5;
  --accent-glow: rgba(0, 245, 160, 0.15);
  --gradient-accent: linear-gradient(135deg, #00F5A0 0%, #00D9F5 100%);
  --gradient-dark: linear-gradient(180deg, #090B0E 0%, #11141A 100%);

  --radius-sm: 8px;
  --radius-md: 14px;
  --radius-lg: 24px;
  --radius-full: 9999px;

  --shadow-sm: 0 4px 12px rgba(0, 0, 0, 0.3);
  --shadow-glow: 0 0 30px rgba(0, 245, 160, 0.2);
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.5);

  --transition-fast: 0.2s cubic-bezier(0.16, 1, 0.3, 1);
  --transition-smooth: 0.35s cubic-bezier(0.16, 1, 0.3, 1);
}

/* Light Theme Variables (Toggleable) */
[data-theme="light"] {
  --bg-primary: #F8FAFC;
  --bg-secondary: #EEF2F6;
  --bg-card: rgba(255, 255, 255, 0.85);
  --bg-card-hover: rgba(255, 255, 255, 1);
  --border-color: rgba(0, 0, 0, 0.08);
  --text-primary: #0F172A;
  --text-secondary: #475569;
  --text-muted: #94A3B8;
  --shadow-card: 0 10px 30px -10px rgba(0, 0, 0, 0.08);
}

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

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

body {
  font-family: 'Plus Jakarta Sans', 'Inter', -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, sans-serif;
  background-color: var(--bg-primary);
  color: var(--text-primary);
  line-height: 1.6;
  overflow-x: hidden;
  position: relative;
  background-image: 
    radial-gradient(circle at 15% 15%, rgba(0, 245, 160, 0.05) 0%, transparent 40%),
    radial-gradient(circle at 85% 65%, rgba(0, 217, 245, 0.04) 0%, transparent 40%);
  background-attachment: fixed;
}

/* Container */
.container {
  width: 100%;
  max-width: 1240px;
  margin: 0 auto;
  padding: 0 24px;
}

/* Typography Utilities */
h1, h2, h3, h4, h5, h6 {
  color: var(--text-primary);
  font-weight: 800;
  line-height: 1.2;
}

.gradient-text {
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  display: inline-block;
}

.section-tag {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 6px 14px;
  background: rgba(0, 245, 160, 0.08);
  border: 1px solid rgba(0, 245, 160, 0.25);
  border-radius: var(--radius-full);
  color: var(--accent-green);
  font-size: 0.825rem;
  font-weight: 700;
  letter-spacing: 1px;
  text-transform: uppercase;
  margin-bottom: 16px;
}

.section-header {
  text-align: center;
  max-width: 760px;
  margin: 0 auto 56px auto;
}

.section-header h2 {
  font-size: 2.5rem;
  margin-bottom: 16px;
  letter-spacing: -0.5px;
}

.section-header p {
  color: var(--text-secondary);
  font-size: 1.1rem;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: 10px;
  padding: 14px 28px;
  font-size: 0.95rem;
  font-weight: 700;
  border-radius: var(--radius-full);
  text-decoration: none;
  cursor: pointer;
  transition: all var(--transition-fast);
  border: none;
  outline: none;
}

.btn-primary {
  background: var(--gradient-accent);
  color: #090B0E;
  box-shadow: 0 4px 20px rgba(0, 245, 160, 0.3);
}

.btn-primary:hover {
  transform: translateY(-2px);
  box-shadow: 0 8px 30px rgba(0, 245, 160, 0.45);
}

.btn-secondary {
  background: rgba(255, 255, 255, 0.05);
  color: var(--text-primary);
  border: 1px solid var(--border-color);
  backdrop-filter: blur(10px);
}

.btn-secondary:hover {
  background: rgba(255, 255, 255, 0.1);
  border-color: rgba(255, 255, 255, 0.2);
  transform: translateY(-2px);
}

.btn-sm {
  padding: 8px 18px;
  font-size: 0.85rem;
}

/* ==========================================================================
   HEADER & NAVBAR
   ========================================================================== */
.site-header {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  z-index: 100;
  background: rgba(9, 11, 14, 0.8);
  backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--border-color);
  transition: all var(--transition-smooth);
}

.site-header.scrolled {
  padding: 10px 0;
  background: rgba(9, 11, 14, 0.95);
  border-bottom-color: rgba(0, 245, 160, 0.15);
}

.nav-container {
  display: flex;
  align-items: center;
  justify-content: space-between;
  height: 76px;
}

.logo-link {
  display: flex;
  align-items: center;
  text-decoration: none;
}

.logo-link img {
  height: 38px;
  width: auto;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: 32px;
  list-style: none;
}

.nav-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.95rem;
  font-weight: 600;
  transition: color var(--transition-fast);
  position: relative;
}

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

.nav-links a.active::after {
  content: '';
  position: absolute;
  bottom: -6px;
  left: 0;
  width: 100%;
  height: 2px;
  background: var(--gradient-accent);
  border-radius: 2px;
}

.nav-actions {
  display: flex;
  align-items: center;
  gap: 16px;
}

/* Hamburger button */
.mobile-toggle {
  display: none;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.5rem;
  cursor: pointer;
}

/* ==========================================================================
   HERO SECTION
   ========================================================================== */
.hero-section {
  padding-top: 170px;
  padding-bottom: 100px;
  position: relative;
  text-align: center;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 8px 18px;
  background: rgba(0, 245, 160, 0.08);
  border: 1px solid rgba(0, 245, 160, 0.25);
  border-radius: var(--radius-full);
  font-size: 0.875rem;
  font-weight: 600;
  color: var(--accent-green);
  margin-bottom: 24px;
}

.pulse-dot {
  width: 8px;
  height: 8px;
  background-color: var(--accent-green);
  border-radius: 50%;
  box-shadow: 0 0 10px var(--accent-green);
  animation: pulseAnimation 2s infinite;
}

@keyframes pulseAnimation {
  0% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 245, 160, 0.7); }
  70% { transform: scale(1.15); box-shadow: 0 0 0 10px rgba(0, 245, 160, 0); }
  100% { transform: scale(0.95); box-shadow: 0 0 0 0 rgba(0, 245, 160, 0); }
}

.hero-title {
  font-size: clamp(2.5rem, 5vw, 4.2rem);
  letter-spacing: -1.5px;
  max-width: 960px;
  margin: 0 auto 24px auto;
}

.hero-description {
  font-size: 1.25rem;
  color: var(--text-secondary);
  max-width: 680px;
  margin: 0 auto 40px auto;
}

.hero-cta-group {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 16px;
  margin-bottom: 64px;
}

/* Soundwave Equalizer Graphic */
.soundwave-visualizer {
  display: flex;
  align-items: center;
  justify-content: center;
  gap: 6px;
  height: 48px;
  margin-bottom: 40px;
}

.soundwave-bar {
  width: 4px;
  background: var(--gradient-accent);
  border-radius: 4px;
  animation: soundWaveAnim 1.2s ease-in-out infinite alternate;
}

.soundwave-bar:nth-child(2) { animation-delay: 0.2s; height: 35px; }
.soundwave-bar:nth-child(3) { animation-delay: 0.4s; height: 48px; }
.soundwave-bar:nth-child(4) { animation-delay: 0.1s; height: 28px; }
.soundwave-bar:nth-child(5) { animation-delay: 0.5s; height: 42px; }
.soundwave-bar:nth-child(6) { animation-delay: 0.3s; height: 20px; }

@keyframes soundWaveAnim {
  0% { transform: scaleY(0.3); opacity: 0.4; }
  100% { transform: scaleY(1); opacity: 1; }
}

/* Hero Stats Bar */
.hero-stats-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 20px;
  max-width: 1060px;
  margin: 0 auto;
  padding: 30px;
  background: var(--bg-card);
  backdrop-filter: blur(16px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  box-shadow: var(--shadow-card);
}

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

.stat-item:not(:last-child)::after {
  content: '';
  position: absolute;
  right: 0;
  top: 15%;
  height: 70%;
  width: 1px;
  background: var(--border-color);
}

.stat-number {
  font-size: 2.2rem;
  font-weight: 800;
  color: var(--text-primary);
  margin-bottom: 4px;
}

.stat-label {
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 600;
}

/* ==========================================================================
   PORTFOLIO SECTION
   ========================================================================== */
.portfolio-section {
  padding: 120px 0;
  position: relative;
}

.portfolio-filters {
  display: flex;
  align-items: center;
  justify-content: center;
  flex-wrap: wrap;
  gap: 12px;
  margin-bottom: 48px;
}

.filter-btn {
  padding: 10px 22px;
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  color: var(--text-secondary);
  border-radius: var(--radius-full);
  font-size: 0.9rem;
  font-weight: 600;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.filter-btn:hover, .filter-btn.active {
  background: rgba(0, 245, 160, 0.12);
  border-color: var(--accent-green);
  color: var(--accent-green);
}

.portfolio-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(360px, 1fr));
  gap: 32px;
}

.portfolio-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  overflow: hidden;
  transition: all var(--transition-smooth);
  display: flex;
  flex-direction: column;
  position: relative;
}

.portfolio-card:hover {
  transform: translateY(-8px);
  border-color: rgba(0, 245, 160, 0.4);
  box-shadow: var(--shadow-glow);
}

.portfolio-thumb {
  position: relative;
  overflow: hidden;
  aspect-ratio: 16 / 10;
  background: #0E1218;
}

.portfolio-thumb img {
  width: 100%;
  height: 100%;
  object-fit: cover;
  transition: transform var(--transition-smooth);
}

.portfolio-card:hover .portfolio-thumb img {
  transform: scale(1.04);
}

.portfolio-badge {
  position: absolute;
  top: 14px;
  left: 14px;
  padding: 6px 12px;
  background: rgba(9, 11, 14, 0.85);
  backdrop-filter: blur(8px);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-full);
  font-size: 0.75rem;
  font-weight: 700;
  color: var(--accent-green);
  text-transform: uppercase;
}

.portfolio-content {
  padding: 24px;
  display: flex;
  flex-direction: column;
  flex-grow: 1;
}

.portfolio-title {
  font-size: 1.35rem;
  margin-bottom: 8px;
}

.portfolio-desc {
  font-size: 0.925rem;
  color: var(--text-secondary);
  margin-bottom: 20px;
  line-height: 1.5;
}

.portfolio-tags {
  display: flex;
  flex-wrap: wrap;
  gap: 8px;
  margin-bottom: 20px;
}

.tag {
  padding: 4px 10px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  border-radius: 6px;
  font-size: 0.75rem;
  color: var(--text-muted);
  font-weight: 600;
}

.portfolio-card-footer {
  margin-top: auto;
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding-top: 16px;
  border-top: 1px solid var(--border-color);
}

.case-study-btn {
  display: inline-flex;
  align-items: center;
  gap: 6px;
  color: var(--accent-green);
  font-size: 0.875rem;
  font-weight: 700;
  text-decoration: none;
  background: none;
  border: none;
  cursor: pointer;
  transition: gap var(--transition-fast);
}

.case-study-btn:hover {
  gap: 10px;
}

/* ==========================================================================
   SERVICES SECTION
   ========================================================================== */
.services-section {
  padding: 120px 0;
  background: var(--bg-secondary);
  position: relative;
}

.services-grid {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(280px, 1fr));
  gap: 28px;
}

.service-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 36px 28px;
  transition: all var(--transition-smooth);
  position: relative;
}

.service-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 245, 160, 0.35);
  background: var(--bg-card-hover);
}

.service-icon {
  width: 56px;
  height: 56px;
  border-radius: 12px;
  background: rgba(0, 245, 160, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.6rem;
  color: var(--accent-green);
  margin-bottom: 24px;
}

.service-title {
  font-size: 1.25rem;
  margin-bottom: 12px;
}

.service-desc {
  color: var(--text-secondary);
  font-size: 0.925rem;
  margin-bottom: 20px;
  line-height: 1.6;
}

.service-features {
  list-style: none;
  margin-top: 16px;
}

.service-features li {
  display: flex;
  align-items: center;
  gap: 10px;
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 8px;
}

.service-features li::before {
  content: '✓';
  color: var(--accent-green);
  font-weight: bold;
}

/* ==========================================================================
   INTERACTIVE CALCULATOR / WYCENA
   ========================================================================== */
.calculator-section {
  padding: 120px 0;
  position: relative;
}

.calculator-wrapper {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 48px;
  box-shadow: var(--shadow-card);
  backdrop-filter: blur(16px);
  display: grid;
  grid-template-columns: 1.4fr 1fr;
  gap: 48px;
}

.calc-step {
  margin-bottom: 36px;
}

.calc-step-title {
  font-size: 1.1rem;
  font-weight: 700;
  margin-bottom: 16px;
  display: flex;
  align-items: center;
  gap: 10px;
}

.step-num {
  width: 26px;
  height: 26px;
  background: var(--accent-green);
  color: #090B0E;
  border-radius: 50%;
  display: inline-flex;
  align-items: center;
  justify-content: center;
  font-size: 0.8rem;
  font-weight: 800;
}

.calc-options-grid {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: 14px;
}

.calc-option {
  position: relative;
  background: rgba(255, 255, 255, 0.03);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  padding: 16px;
  cursor: pointer;
  transition: all var(--transition-fast);
}

.calc-option:hover {
  border-color: rgba(0, 245, 160, 0.3);
}

.calc-option input[type="radio"],
.calc-option input[type="checkbox"] {
  position: absolute;
  opacity: 0;
}

.calc-option.selected {
  background: rgba(0, 245, 160, 0.1);
  border-color: var(--accent-green);
}

.option-name {
  display: block;
  font-weight: 700;
  font-size: 0.95rem;
  margin-bottom: 4px;
}

.option-hint {
  display: block;
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* Range Slider */
.calc-slider-wrapper {
  margin-top: 10px;
}

.calc-slider {
  width: 100%;
  height: 6px;
  background: rgba(255, 255, 255, 0.1);
  border-radius: 4px;
  outline: none;
  -webkit-appearance: none;
  accent-color: var(--accent-green);
}

.slider-val-display {
  display: flex;
  justify-content: space-between;
  margin-top: 8px;
  font-size: 0.85rem;
  color: var(--text-secondary);
  font-weight: 600;
}

/* Calculator Summary Box */
.calc-summary-card {
  background: var(--bg-secondary);
  border: 1px solid rgba(0, 245, 160, 0.25);
  border-radius: var(--radius-md);
  padding: 36px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
  text-align: center;
  position: relative;
  overflow: hidden;
}

.calc-summary-card::before {
  content: '';
  position: absolute;
  top: 0;
  left: 0;
  right: 0;
  height: 4px;
  background: var(--gradient-accent);
}

.summary-title {
  font-size: 1.1rem;
  color: var(--text-secondary);
  margin-bottom: 12px;
}

.calculated-price {
  font-size: 3rem;
  font-weight: 800;
  color: var(--accent-green);
  margin-bottom: 8px;
}

.price-subtext {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 30px;
}

.calc-included-list {
  text-align: left;
  list-style: none;
  margin-bottom: 32px;
}

.calc-included-list li {
  font-size: 0.85rem;
  color: var(--text-secondary);
  margin-bottom: 10px;
  display: flex;
  align-items: center;
  gap: 8px;
}

.calc-included-list li span {
  color: var(--accent-green);
  font-weight: bold;
}

/* ==========================================================================
   PROCESS / WORKFLOW
   ========================================================================== */
.process-section {
  padding: 120px 0;
  background: var(--bg-secondary);
}

.process-grid {
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: 24px;
}

.process-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px 24px;
  position: relative;
  transition: all var(--transition-smooth);
}

.process-card:hover {
  transform: translateY(-6px);
  border-color: rgba(0, 245, 160, 0.3);
}

.process-step-num {
  font-size: 2.8rem;
  font-weight: 900;
  background: var(--gradient-accent);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  opacity: 0.3;
  margin-bottom: 12px;
}

.process-card:hover .process-step-num {
  opacity: 1;
}

.process-title {
  font-size: 1.15rem;
  margin-bottom: 10px;
}

.process-desc {
  font-size: 0.875rem;
  color: var(--text-secondary);
  line-height: 1.5;
}

/* ==========================================================================
   TESTIMONIALS & FAQ
   ========================================================================== */
.testimonials-section {
  padding: 120px 0;
}

.testimonials-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: 28px;
}

.testimonial-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-md);
  padding: 32px;
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.testimonial-stars {
  color: #F59E0B;
  font-size: 1rem;
  margin-bottom: 16px;
  letter-spacing: 2px;
}

.testimonial-quote {
  font-size: 0.95rem;
  color: var(--text-secondary);
  font-style: italic;
  margin-bottom: 24px;
  line-height: 1.6;
}

.client-info {
  display: flex;
  align-items: center;
  gap: 14px;
}

.client-avatar {
  width: 44px;
  height: 44px;
  border-radius: 50%;
  background: var(--gradient-accent);
  display: flex;
  align-items: center;
  justify-content: center;
  font-weight: 800;
  color: #090B0E;
  font-size: 0.9rem;
}

.client-name {
  font-weight: 700;
  font-size: 0.95rem;
}

.client-role {
  font-size: 0.8rem;
  color: var(--text-muted);
}

/* FAQ Accordion */
.faq-section {
  padding: 120px 0;
  background: var(--bg-secondary);
}

.faq-accordion {
  max-width: 820px;
  margin: 0 auto;
}

.faq-item {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  margin-bottom: 16px;
  overflow: hidden;
  transition: border-color var(--transition-fast);
}

.faq-item.active {
  border-color: rgba(0, 245, 160, 0.4);
}

.faq-question {
  width: 100%;
  padding: 22px 24px;
  background: none;
  border: none;
  color: var(--text-primary);
  font-size: 1.05rem;
  font-weight: 700;
  text-align: left;
  display: flex;
  justify-content: space-between;
  align-items: center;
  cursor: pointer;
}

.faq-icon {
  font-size: 1.4rem;
  color: var(--accent-green);
  transition: transform var(--transition-fast);
}

.faq-item.active .faq-icon {
  transform: rotate(45deg);
}

.faq-answer {
  max-height: 0;
  overflow: hidden;
  transition: max-height var(--transition-smooth), padding var(--transition-smooth);
}

.faq-item.active .faq-answer {
  padding: 0 24px 22px 24px;
}

.faq-answer p {
  color: var(--text-secondary);
  font-size: 0.95rem;
  line-height: 1.6;
}

/* ==========================================================================
   CONTACT / BRIEF FORM
   ========================================================================== */
.contact-section {
  padding: 120px 0;
  position: relative;
}

.contact-grid {
  display: grid;
  grid-template-columns: 1fr 1.3fr;
  gap: 56px;
}

.contact-info-card {
  display: flex;
  flex-direction: column;
  justify-content: space-between;
}

.contact-detail-item {
  display: flex;
  align-items: flex-start;
  gap: 16px;
  margin-bottom: 28px;
}

.contact-icon {
  width: 44px;
  height: 44px;
  border-radius: 10px;
  background: rgba(0, 245, 160, 0.1);
  display: flex;
  align-items: center;
  justify-content: center;
  color: var(--accent-green);
  font-size: 1.2rem;
  flex-shrink: 0;
}

.contact-detail-title {
  font-size: 0.85rem;
  color: var(--text-muted);
  margin-bottom: 4px;
  text-transform: uppercase;
  letter-spacing: 0.5px;
}

.contact-detail-value {
  font-size: 1.1rem;
  font-weight: 700;
  color: var(--text-primary);
  text-decoration: none;
}

.contact-detail-value:hover {
  color: var(--accent-green);
}

.contact-form-card {
  background: var(--bg-card);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  padding: 40px;
  backdrop-filter: blur(16px);
}

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

.form-label {
  display: block;
  font-size: 0.875rem;
  font-weight: 700;
  margin-bottom: 8px;
  color: var(--text-primary);
}

.form-control {
  width: 100%;
  padding: 14px 18px;
  background: rgba(255, 255, 255, 0.04);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-sm);
  color: var(--text-primary);
  font-family: inherit;
  font-size: 0.95rem;
  transition: all var(--transition-fast);
}

.form-control:focus {
  outline: none;
  border-color: var(--accent-green);
  background: rgba(255, 255, 255, 0.07);
  box-shadow: 0 0 0 3px rgba(0, 245, 160, 0.15);
}

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

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

/* Toast notification */
.toast-msg {
  position: fixed;
  bottom: 24px;
  right: 24px;
  padding: 16px 24px;
  background: #00F5A0;
  color: #090B0E;
  font-weight: 700;
  border-radius: var(--radius-sm);
  box-shadow: 0 10px 30px rgba(0, 0, 0, 0.5);
  transform: translateY(100px);
  opacity: 0;
  transition: all var(--transition-smooth);
  z-index: 1000;
}

.toast-msg.show {
  transform: translateY(0);
  opacity: 1;
}

/* ==========================================================================
   MODAL / CASE STUDY POPUP
   ========================================================================== */
.modal-overlay {
  position: fixed;
  top: 0;
  left: 0;
  right: 0;
  bottom: 0;
  background: rgba(9, 11, 14, 0.85);
  backdrop-filter: blur(12px);
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  opacity: 0;
  visibility: hidden;
  transition: all var(--transition-smooth);
  padding: 24px;
}

.modal-overlay.active {
  opacity: 1;
  visibility: visible;
}

.modal-card {
  background: var(--bg-secondary);
  border: 1px solid var(--border-color);
  border-radius: var(--radius-lg);
  max-width: 900px;
  width: 100%;
  max-height: 90vh;
  overflow-y: auto;
  position: relative;
  box-shadow: var(--shadow-card);
  transform: scale(0.95);
  transition: transform var(--transition-smooth);
}

.modal-overlay.active .modal-card {
  transform: scale(1);
}

.modal-close {
  position: absolute;
  top: 20px;
  right: 20px;
  background: rgba(255, 255, 255, 0.08);
  border: none;
  color: var(--text-primary);
  width: 38px;
  height: 38px;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  font-size: 1.2rem;
  cursor: pointer;
  z-index: 10;
  transition: background var(--transition-fast);
}

.modal-close:hover {
  background: rgba(255, 255, 255, 0.2);
}

.modal-body {
  padding: 40px;
}

.modal-image {
  width: 100%;
  border-radius: var(--radius-md);
  margin-bottom: 24px;
  border: 1px solid var(--border-color);
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.site-footer {
  padding: 60px 0 30px 0;
  background: #06070A;
  border-top: 1px solid var(--border-color);
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  margin-bottom: 40px;
  flex-wrap: wrap;
  gap: 24px;
}

.footer-links {
  display: flex;
  gap: 24px;
  list-style: none;
}

.footer-links a {
  color: var(--text-secondary);
  text-decoration: none;
  font-size: 0.9rem;
  transition: color var(--transition-fast);
}

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

.footer-bottom {
  text-align: center;
  color: var(--text-muted);
  font-size: 0.85rem;
  padding-top: 24px;
  border-top: 1px solid rgba(255, 255, 255, 0.05);
}

/* ==========================================================================
   RESPONSIVE DESIGN (MEDIA QUERIES)
   ========================================================================== */
@media (max-width: 1024px) {
  .hero-stats-grid { grid-template-columns: repeat(2, 1fr); gap: 24px; }
  .stat-item:nth-child(2)::after { display: none; }
  .calculator-wrapper { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: repeat(2, 1fr); }
  .testimonials-grid { grid-template-columns: 1fr; }
  .contact-grid { grid-template-columns: 1fr; }
}

@media (max-width: 768px) {
  .nav-links {
    position: fixed;
    top: 76px;
    left: 0;
    right: 0;
    background: var(--bg-primary);
    border-bottom: 1px solid var(--border-color);
    flex-direction: column;
    padding: 30px;
    gap: 20px;
    display: none;
  }
  .nav-links.active { display: flex; }
  .mobile-toggle { display: block; }
  .hero-title { font-size: 2.4rem; }
  .calc-options-grid { grid-template-columns: 1fr; }
  .form-row { grid-template-columns: 1fr; }
  .process-grid { grid-template-columns: 1fr; }
  .hero-stats-grid { grid-template-columns: 1fr; }
  .stat-item::after { display: none !important; }
}