/* =============================================
   Penobscot Temperature Controls — Design Tokens
   Steel blue palette with teal accent
   ============================================= */

:root {
  /* Type Scale */
  --text-xs:   clamp(0.75rem,  0.7rem  + 0.25vw, 0.875rem);
  --text-sm:   clamp(0.875rem, 0.8rem  + 0.35vw, 1rem);
  --text-base: clamp(1rem,     0.95rem + 0.25vw, 1.125rem);
  --text-lg:   clamp(1.125rem, 1rem    + 0.75vw, 1.5rem);
  --text-xl:   clamp(1.5rem,   1.2rem  + 1.25vw, 2.25rem);
  --text-2xl:  clamp(2rem,     1.2rem  + 2.5vw,  3.5rem);
  --text-3xl:  clamp(2.5rem,   1rem    + 4vw,    5rem);

  /* Spacing (4px base) */
  --space-1:  0.25rem;
  --space-2:  0.5rem;
  --space-3:  0.75rem;
  --space-4:  1rem;
  --space-5:  1.25rem;
  --space-6:  1.5rem;
  --space-8:  2rem;
  --space-10: 2.5rem;
  --space-12: 3rem;
  --space-16: 4rem;
  --space-20: 5rem;
  --space-24: 6rem;
  --space-32: 8rem;

  /* Radius */
  --radius-sm: 0.375rem;
  --radius-md: 0.5rem;
  --radius-lg: 0.75rem;
  --radius-xl: 1rem;
  --radius-full: 9999px;

  /* Transitions */
  --transition-interactive: 180ms cubic-bezier(0.16, 1, 0.3, 1);

  /* Content widths */
  --content-narrow: 640px;
  --content-default: 960px;
  --content-wide: 1200px;
  --content-full: 100%;

  /* Fonts */
  --font-display: 'Plus Jakarta Sans', 'Helvetica Neue', sans-serif;
  --font-body: 'Work Sans', 'Helvetica Neue', sans-serif;
}

/* =============================================
   LIGHT MODE — Steel Blue + Teal Accent
   ============================================= */
:root, [data-theme="light"] {
  /* Surfaces */
  --color-bg:             #f4f7fa;
  --color-surface:        #ffffff;
  --color-surface-2:      #f8fafb;
  --color-surface-offset: #e8eef4;
  --color-surface-offset-2: #dce5ee;
  --color-divider:        #c8d4e0;
  --color-border:         #b8c8d8;

  /* Text */
  --color-text:           #1a2332;
  --color-text-muted:     #5a6b7d;
  --color-text-faint:     #8e9bab;
  --color-text-inverse:   #f4f7fa;

  /* Primary — Steel Blue */
  --color-primary:        #3d6b8e;
  --color-primary-hover:  #2d5577;
  --color-primary-active: #1e3f5e;
  --color-primary-light:  #e0ecf5;

  /* Accent — Teal */
  --color-accent:         #0d877e;
  --color-accent-hover:   #096e67;
  --color-accent-active:  #065650;
  --color-accent-light:   #d8f0ee;

  /* Shadows */
  --shadow-sm: 0 1px 3px rgba(26, 35, 50, 0.06);
  --shadow-md: 0 4px 12px rgba(26, 35, 50, 0.08);
  --shadow-lg: 0 12px 32px rgba(26, 35, 50, 0.12);
}

/* =============================================
   DARK MODE
   ============================================= */
[data-theme="dark"] {
  --color-bg:             #0f1520;
  --color-surface:        #151d2a;
  --color-surface-2:      #1a2435;
  --color-surface-offset: #1e2840;
  --color-surface-offset-2: #243050;
  --color-divider:        #2a3550;
  --color-border:         #354060;

  --color-text:           #c8d4e2;
  --color-text-muted:     #7e8da0;
  --color-text-faint:     #556070;
  --color-text-inverse:   #1a2332;

  --color-primary:        #6a9cc0;
  --color-primary-hover:  #83b0d0;
  --color-primary-active: #5088b0;
  --color-primary-light:  #1e2840;

  --color-accent:         #3db8ae;
  --color-accent-hover:   #55ccca;
  --color-accent-active:  #2aa098;
  --color-accent-light:   #1a2c2b;

  --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.25);
  --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.35);
  --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.45);
}

@media (prefers-color-scheme: dark) {
  :root:not([data-theme]) {
    --color-bg:             #0f1520;
    --color-surface:        #151d2a;
    --color-surface-2:      #1a2435;
    --color-surface-offset: #1e2840;
    --color-surface-offset-2: #243050;
    --color-divider:        #2a3550;
    --color-border:         #354060;
    --color-text:           #c8d4e2;
    --color-text-muted:     #7e8da0;
    --color-text-faint:     #556070;
    --color-text-inverse:   #1a2332;
    --color-primary:        #6a9cc0;
    --color-primary-hover:  #83b0d0;
    --color-primary-active: #5088b0;
    --color-primary-light:  #1e2840;
    --color-accent:         #3db8ae;
    --color-accent-hover:   #55ccca;
    --color-accent-active:  #2aa098;
    --color-accent-light:   #1a2c2b;
    --shadow-sm: 0 1px 3px rgba(0, 0, 0, 0.25);
    --shadow-md: 0 4px 12px rgba(0, 0, 0, 0.35);
    --shadow-lg: 0 12px 32px rgba(0, 0, 0, 0.45);
  }
}

/* =============================================
   COMPONENT STYLES
   ============================================= */

/* --- Header / Nav --- */
.site-header {
  position: sticky;
  top: 0;
  z-index: 50;
  background: color-mix(in srgb, var(--color-bg) 92%, transparent);
  backdrop-filter: blur(16px);
  -webkit-backdrop-filter: blur(16px);
  border-bottom: 1px solid var(--color-divider);
  transition: box-shadow 0.3s ease;
}

.site-header--scrolled {
  box-shadow: var(--shadow-md);
}

.header-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-4) var(--space-6);
  display: flex;
  align-items: center;
  justify-content: space-between;
  gap: var(--space-4);
}

.logo-group {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}

.logo-group svg {
  flex-shrink: 0;
}

.logo-text {
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-sm);
  line-height: 1.2;
  letter-spacing: -0.01em;
}

.logo-text span {
  display: block;
  font-weight: 500;
  font-size: var(--text-xs);
  color: var(--color-accent);
  letter-spacing: 0.04em;
  text-transform: uppercase;
}

.nav-links {
  display: flex;
  align-items: center;
  gap: var(--space-6);
  list-style: none;
}

.nav-links a {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  text-decoration: none;
  position: relative;
}

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

.nav-links a::after {
  content: '';
  position: absolute;
  bottom: -4px;
  left: 0;
  width: 0;
  height: 2px;
  background: var(--color-accent);
  transition: width 0.3s ease;
}

.nav-links a:hover::after {
  width: 100%;
}

.header-cta {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-5);
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text-inverse);
  background: var(--color-primary);
  border-radius: var(--radius-md);
  text-decoration: none;
  white-space: nowrap;
}

.header-cta:hover {
  background: var(--color-primary-hover);
}

.theme-toggle {
  padding: var(--space-2);
  color: var(--color-text-muted);
  border-radius: var(--radius-md);
  display: flex;
  align-items: center;
  justify-content: center;
}

.theme-toggle:hover {
  color: var(--color-text);
  background: var(--color-surface-offset);
}

/* Mobile menu toggle */
.mobile-toggle {
  display: none;
  flex-direction: column;
  gap: 5px;
  padding: var(--space-2);
}

.mobile-toggle span {
  width: 22px;
  height: 2px;
  background: var(--color-text);
  border-radius: 2px;
  transition: all 0.3s ease;
}

@media (max-width: 768px) {
  .mobile-toggle {
    display: flex;
  }
  .nav-links {
    display: none;
    position: absolute;
    top: 100%;
    left: 0;
    right: 0;
    flex-direction: column;
    background: var(--color-surface);
    border-bottom: 1px solid var(--color-divider);
    padding: var(--space-6);
    gap: var(--space-4);
    box-shadow: var(--shadow-lg);
  }
  .nav-links.active {
    display: flex;
  }
  .header-cta {
    display: none;
  }
}

/* --- Hero --- */
.hero {
  position: relative;
  min-height: 85vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.hero-bg {
  position: absolute;
  inset: 0;
  z-index: 0;
}

.hero-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.hero-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    135deg,
    rgba(15, 21, 32, 0.85) 0%,
    rgba(15, 21, 32, 0.6) 50%,
    rgba(15, 21, 32, 0.3) 100%
  );
}

.hero-content {
  position: relative;
  z-index: 1;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-24) var(--space-6) var(--space-16);
  color: #f4f7fa;
}

.hero-badge {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-2) var(--space-4);
  background: rgba(13, 135, 126, 0.2);
  border: 1px solid rgba(13, 135, 126, 0.4);
  border-radius: var(--radius-full);
  font-size: var(--text-xs);
  font-weight: 600;
  color: #3db8ae;
  text-transform: uppercase;
  letter-spacing: 0.06em;
  margin-bottom: var(--space-6);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 800;
  line-height: 1.05;
  letter-spacing: -0.02em;
  max-width: 14ch;
  margin-bottom: var(--space-6);
}

.hero p {
  font-size: var(--text-lg);
  color: rgba(200, 212, 226, 0.9);
  max-width: 42ch;
  margin-bottom: var(--space-8);
  line-height: 1.6;
}

.hero-actions {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  align-items: center;
}

.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
  font-weight: 700;
  color: #fff;
  background: var(--color-accent);
  border-radius: var(--radius-md);
  text-decoration: none;
  border: none;
  cursor: pointer;
}

.btn-primary:hover {
  background: var(--color-accent-hover);
  transform: translateY(-1px);
  box-shadow: 0 8px 24px rgba(13, 135, 126, 0.3);
}

.btn-outline {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
  font-weight: 600;
  color: #f4f7fa;
  background: transparent;
  border: 2px solid rgba(244, 247, 250, 0.3);
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
}

.btn-outline:hover {
  border-color: rgba(244, 247, 250, 0.6);
  background: rgba(244, 247, 250, 0.08);
}

/* --- Trust Bar --- */
.trust-bar {
  background: var(--color-surface);
  border-bottom: 1px solid var(--color-divider);
  padding: var(--space-8) var(--space-6);
}

.trust-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(4, 1fr);
  gap: var(--space-8);
  text-align: center;
}

.trust-item {
  display: flex;
  flex-direction: column;
  align-items: center;
  gap: var(--space-2);
}

.trust-number {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-primary);
}

.trust-label {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
  text-transform: uppercase;
  letter-spacing: 0.06em;
  font-weight: 500;
}

@media (max-width: 640px) {
  .trust-inner {
    grid-template-columns: repeat(2, 1fr);
    gap: var(--space-6);
  }
}

/* --- Section Shared --- */
.section {
  padding: clamp(var(--space-12), 8vw, var(--space-24)) var(--space-6);
}

.section-header {
  max-width: var(--content-wide);
  margin: 0 auto var(--space-12);
  text-align: center;
}

.section-label {
  font-size: var(--text-xs);
  font-weight: 700;
  color: var(--color-accent);
  text-transform: uppercase;
  letter-spacing: 0.1em;
  margin-bottom: var(--space-3);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  color: var(--color-text);
  letter-spacing: -0.02em;
  margin-bottom: var(--space-4);
}

.section-desc {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 56ch;
  margin: 0 auto;
}

/* --- Services Grid --- */
.services-grid {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.service-card {
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  padding: var(--space-8);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
  transition: transform 0.3s ease, box-shadow 0.3s ease;
}

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

.service-icon {
  width: 56px;
  height: 56px;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-light);
  border-radius: var(--radius-md);
  color: var(--color-primary);
}

.service-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 700;
  color: var(--color-text);
}

.service-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.7;
}

@media (max-width: 768px) {
  .services-grid {
    grid-template-columns: 1fr;
  }
}

/* --- About / Split Layout --- */
.about-section {
  background: var(--color-surface);
}

.about-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-12);
  align-items: center;
}

.about-image {
  border-radius: var(--radius-lg);
  overflow: hidden;
  aspect-ratio: 4/3;
}

.about-image img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.about-content h2 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 800;
  color: var(--color-text);
  margin-bottom: var(--space-4);
}

.about-content p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  margin-bottom: var(--space-4);
  line-height: 1.7;
}

.about-list {
  list-style: none;
  padding: 0;
  margin: var(--space-6) 0;
  display: flex;
  flex-direction: column;
  gap: var(--space-3);
}

.about-list li {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-size: var(--text-sm);
  color: var(--color-text);
  font-weight: 500;
}

.about-list li svg {
  flex-shrink: 0;
  color: var(--color-accent);
}

@media (max-width: 768px) {
  .about-inner {
    grid-template-columns: 1fr;
    gap: var(--space-8);
  }
}

/* --- Comfort Section (full-bleed image) --- */
.comfort-section {
  position: relative;
  min-height: 60vh;
  display: flex;
  align-items: center;
  overflow: hidden;
}

.comfort-bg {
  position: absolute;
  inset: 0;
}

.comfort-bg img {
  width: 100%;
  height: 100%;
  object-fit: cover;
}

.comfort-overlay {
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to right,
    rgba(15, 21, 32, 0.9) 0%,
    rgba(15, 21, 32, 0.5) 60%,
    rgba(15, 21, 32, 0.2) 100%
  );
}

.comfort-content {
  position: relative;
  z-index: 1;
  max-width: var(--content-wide);
  margin: 0 auto;
  padding: var(--space-16) var(--space-6);
  color: #f4f7fa;
  max-width: 55ch;
}

.comfort-content h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

.comfort-content p {
  font-size: var(--text-base);
  color: rgba(200, 212, 226, 0.9);
  line-height: 1.7;
  margin-bottom: var(--space-6);
}

/* --- Why Choose Us --- */
.features-grid {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--space-6);
}

.feature-card {
  display: flex;
  gap: var(--space-5);
  padding: var(--space-6);
  background: var(--color-surface);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
}

.feature-icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-accent-light);
  border-radius: var(--radius-md);
  color: var(--color-accent);
}

.feature-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-2);
}

.feature-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
}

@media (max-width: 768px) {
  .features-grid {
    grid-template-columns: 1fr;
  }
}

/* --- Testimonials --- */
.testimonials-section {
  background: var(--color-surface);
}

.testimonials-grid {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.testimonial-card {
  padding: var(--space-6);
  background: var(--color-bg);
  border: 1px solid var(--color-divider);
  border-radius: var(--radius-lg);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.testimonial-stars {
  display: flex;
  gap: 2px;
  color: #e8a73e;
}

.testimonial-card blockquote {
  font-size: var(--text-sm);
  color: var(--color-text);
  line-height: 1.7;
  font-style: italic;
}

.testimonial-author {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  margin-top: auto;
}

.testimonial-avatar {
  width: 40px;
  height: 40px;
  border-radius: var(--radius-full);
  background: var(--color-primary-light);
  display: flex;
  align-items: center;
  justify-content: center;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-sm);
  color: var(--color-primary);
}

.testimonial-name {
  font-size: var(--text-sm);
  font-weight: 600;
  color: var(--color-text);
}

.testimonial-location {
  font-size: var(--text-xs);
  color: var(--color-text-muted);
}

@media (max-width: 768px) {
  .testimonials-grid {
    grid-template-columns: 1fr;
  }
}

/* --- CTA Section --- */
.cta-section {
  background: var(--color-primary);
  color: #fff;
  text-align: center;
}

.cta-inner {
  max-width: var(--content-default);
  margin: 0 auto;
}

.cta-section h2 {
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 800;
  margin-bottom: var(--space-4);
  letter-spacing: -0.02em;
}

.cta-section p {
  font-size: var(--text-base);
  color: rgba(255, 255, 255, 0.8);
  max-width: 48ch;
  margin: 0 auto var(--space-8);
}

.cta-actions {
  display: flex;
  justify-content: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.btn-white {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
  font-weight: 700;
  color: var(--color-primary);
  background: #fff;
  border-radius: var(--radius-md);
  text-decoration: none;
  border: none;
  cursor: pointer;
}

.btn-white:hover {
  background: rgba(255, 255, 255, 0.9);
  transform: translateY(-1px);
}

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: var(--space-2);
  padding: var(--space-4) var(--space-8);
  font-size: var(--text-base);
  font-weight: 600;
  color: #fff;
  background: transparent;
  border: 2px solid rgba(255, 255, 255, 0.3);
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
}

.btn-ghost:hover {
  border-color: rgba(255, 255, 255, 0.6);
  background: rgba(255, 255, 255, 0.08);
}

/* --- Contact Info Bar --- */
.contact-bar {
  background: var(--color-surface-offset);
}

.contact-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
}

.contact-item {
  display: flex;
  align-items: flex-start;
  gap: var(--space-4);
}

.contact-icon {
  width: 48px;
  height: 48px;
  flex-shrink: 0;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-primary-light);
  border-radius: var(--radius-md);
  color: var(--color-primary);
}

.contact-item h3 {
  font-family: var(--font-display);
  font-size: var(--text-sm);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.contact-item p,
.contact-item a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
  line-height: 1.5;
}

.contact-item a:hover {
  color: var(--color-primary);
}

@media (max-width: 768px) {
  .contact-inner {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }
}

/* --- Footer --- */
.site-footer {
  background: var(--color-surface);
  border-top: 1px solid var(--color-divider);
  padding: var(--space-10) var(--space-6) var(--space-6);
}

.footer-inner {
  max-width: var(--content-wide);
  margin: 0 auto;
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.footer-top {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-4);
}

.footer-logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  text-decoration: none;
  color: var(--color-text);
}

.footer-logo .logo-text {
  font-size: var(--text-xs);
}

.footer-links {
  display: flex;
  gap: var(--space-6);
  list-style: none;
}

.footer-links a {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  text-decoration: none;
}

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

.footer-divider {
  height: 1px;
  background: var(--color-divider);
}

.footer-bottom {
  display: flex;
  justify-content: space-between;
  align-items: center;
  flex-wrap: wrap;
  gap: var(--space-3);
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer-bottom a {
  color: var(--color-text-muted);
  text-decoration: none;
}

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

.footer-credits {
  display: flex;
  gap: var(--space-4);
  align-items: center;
  flex-wrap: wrap;
}

.footer-credits span {
  color: var(--color-divider);
}

/* --- Scroll animations --- */
.reveal {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

.reveal.visible {
  opacity: 1;
  transform: translateY(0);
}

/* --- Utility --- */
.bg-alt {
  background: var(--color-bg);
}