/* ======================================
   plano B — Brand Design System
   Primary: #21409a (deep blue)
   Font: Poppins
   ====================================== */

: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;

  /* Fonts — Poppins per brand guide */
  --font-display: 'Poppins', 'Helvetica Neue', sans-serif;
  --font-body: 'Poppins', 'Helvetica Neue', sans-serif;
}

/* ========== LIGHT THEME (DEFAULT) ========== */
:root, [data-theme="light"] {
  --color-bg:             #f5f6fa;
  --color-surface:        #ffffff;
  --color-surface-2:      #eef0f7;
  --color-surface-offset: #e8eaf3;
  --color-divider:        #d8dbe8;
  --color-border:         #c8ccdd;

  --color-text:           #0c0e1a;
  --color-text-muted:     #4a5070;
  --color-text-faint:     #8890aa;
  --color-text-inverse:   #ffffff;

  /* Primary: Brand Blue #21409a */
  --color-primary:        #21409a;
  --color-primary-hover:  #1a3580;
  --color-primary-active: #152c6a;
  --color-primary-highlight: #e0e4f5;

  /* Brand blue for solid backgrounds */
  --color-brand:          #21409a;
  --color-brand-light:    #90a0cd;
  --color-brand-lighter:  #bac6e4;

  /* Success */
  --color-success:        #437a22;

  /* Accent (maroon from brand) */
  --color-accent:         #6d1b23;

  /* Shadows */
  --shadow-sm: 0 1px 2px rgba(33,64,154,0.06);
  --shadow-md: 0 4px 12px rgba(33,64,154,0.08);
  --shadow-lg: 0 12px 32px rgba(33,64,154,0.12);
}

/* ========== DARK THEME ========== */
[data-theme="dark"] {
  --color-bg:             #0c0e1a;
  --color-surface:        #121630;
  --color-surface-2:      #181d3a;
  --color-surface-offset: #151a32;
  --color-divider:        #1e2444;
  --color-border:         #2a3158;

  --color-text:           #e6e8f0;
  --color-text-muted:     #90a0cd;
  --color-text-faint:     #556080;
  --color-text-inverse:   #ffffff;

  --color-primary:        #4a6fd4;
  --color-primary-hover:  #5e80e0;
  --color-primary-active: #3a5cba;
  --color-primary-highlight: #1a2650;

  --color-brand:          #21409a;
  --color-brand-light:    #90a0cd;
  --color-brand-lighter:  #bac6e4;

  --color-success:        #5a9a3f;
  --color-accent:         #6d1b23;

  --shadow-sm: 0 1px 2px rgba(0,0,0,0.3);
  --shadow-md: 0 4px 12px rgba(0,0,0,0.4);
  --shadow-lg: 0 12px 32px rgba(0,0,0,0.5);
}

/* ========== GLOBAL STYLES ========== */

a {
  color: var(--color-primary);
  text-decoration: none;
}
a:hover {
  color: var(--color-primary-hover);
}

/* ========== HEADER ========== */
.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 color-mix(in srgb, var(--color-border) 30%, transparent);
}

.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;
}

.logo {
  display: flex;
  align-items: center;
  gap: var(--space-3);
  font-family: var(--font-display);
  font-weight: 700;
  font-size: var(--text-lg);
  color: var(--color-text);
  text-decoration: none;
}

.logo-text-lower {
  font-weight: 400;
}

.logo-text-upper {
  font-weight: 700;
}

.logo-img {
  height: 40px;
  width: auto;
  display: block;
}

[data-theme="dark"] .logo-img {
  filter: brightness(0) invert(1);
}

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

.lang-toggle {
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-text-muted);
  padding: var(--space-1) var(--space-3);
  border-radius: var(--radius-full);
  border: 1px solid var(--color-border);
  cursor: pointer;
  background: transparent;
}
.lang-toggle:hover {
  color: var(--color-text);
  border-color: var(--color-text-muted);
}

.theme-toggle {
  color: var(--color-text-muted);
  padding: var(--space-1);
  display: flex;
  align-items: center;
}
.theme-toggle:hover {
  color: var(--color-text);
}

/* ========== 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;
  opacity: 0.25;
}

.hero-bg::after {
  content: '';
  position: absolute;
  inset: 0;
  background: linear-gradient(
    to bottom,
    color-mix(in srgb, var(--color-bg) 30%, transparent) 0%,
    color-mix(in srgb, var(--color-bg) 70%, transparent) 50%,
    var(--color-bg) 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);
  display: grid;
  grid-template-columns: 1fr;
  gap: var(--space-8);
}

.hero-tagline {
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 500;
  color: var(--color-brand-light);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: var(--space-2);
}

.hero h1 {
  font-family: var(--font-display);
  font-size: var(--text-3xl);
  font-weight: 700;
  color: var(--color-text);
  max-width: 18ch;
  line-height: 1.05;
}

.hero h1 span {
  color: var(--color-primary);
}

.hero-description {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  max-width: 50ch;
  line-height: 1.7;
}

.cta-group {
  display: flex;
  flex-wrap: wrap;
  gap: var(--space-4);
  margin-top: var(--space-4);
}

/* ========== BUTTONS ========== */
.btn {
  display: inline-flex;
  align-items: center;
  justify-content: center;
  gap: var(--space-2);
  font-family: var(--font-body);
  font-size: var(--text-sm);
  font-weight: 600;
  padding: var(--space-3) var(--space-6);
  border-radius: var(--radius-md);
  text-decoration: none;
  cursor: pointer;
  border: none;
  white-space: nowrap;
  min-height: 48px;
}

.btn-primary {
  background: var(--color-primary);
  color: var(--color-text-inverse);
}
.btn-primary:hover {
  background: var(--color-primary-hover);
  color: var(--color-text-inverse);
}

.btn-outline {
  background: transparent;
  color: var(--color-text);
  border: 1px solid var(--color-border);
}
.btn-outline:hover {
  border-color: var(--color-text-muted);
  background: var(--color-surface);
}

/* ========== SECTIONS ========== */
.section {
  padding-block: clamp(var(--space-12), 8vw, var(--space-24));
  padding-inline: var(--space-6);
}

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

.section-label {
  font-family: var(--font-body);
  font-size: var(--text-xs);
  font-weight: 600;
  color: var(--color-primary);
  text-transform: uppercase;
  letter-spacing: 0.12em;
  margin-bottom: var(--space-3);
}

.section-title {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-text);
  margin-bottom: var(--space-8);
  max-width: 28ch;
}

/* ========== PROBLEM SECTION ========== */
.problem-grid {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-8);
  align-items: start;
}

.problem-stats {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.stat-item {
  padding: var(--space-6);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid color-mix(in srgb, var(--color-border) 30%, transparent);
}

.stat-number {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: var(--color-primary);
  margin-bottom: var(--space-1);
}

.stat-label {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}

.problem-text {
  display: flex;
  flex-direction: column;
  gap: var(--space-6);
}

.problem-text p {
  font-size: var(--text-base);
  color: var(--color-text-muted);
  line-height: 1.7;
}

.problem-text .highlight-quote {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  padding-left: var(--space-6);
  border-left: 3px solid var(--color-primary);
  line-height: 1.4;
}

/* ========== SERVICES ========== */
.services-grid {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-6);
}

.service-card {
  padding: var(--space-8);
  background: var(--color-surface);
  border-radius: var(--radius-lg);
  border: 1px solid color-mix(in srgb, var(--color-border) 30%, transparent);
  display: flex;
  flex-direction: column;
  gap: var(--space-4);
}

.service-icon {
  width: 48px;
  height: 48px;
  color: var(--color-primary);
}

.service-card h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
}

.service-card p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.6;
  flex: 1;
}

.service-tag {
  font-size: var(--text-xs);
  color: var(--color-primary);
  font-weight: 600;
  text-transform: uppercase;
  letter-spacing: 0.06em;
}

/* ========== HOW IT WORKS ========== */
.steps {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--space-8);
  counter-reset: step;
}

.step {
  counter-increment: step;
  position: relative;
  padding-top: var(--space-8);
}

.step::before {
  content: counter(step, decimal-leading-zero);
  font-family: var(--font-display);
  font-size: var(--text-2xl);
  font-weight: 700;
  color: color-mix(in srgb, var(--color-primary) 20%, transparent);
  position: absolute;
  top: 0;
  left: 0;
}

.step h3 {
  font-family: var(--font-display);
  font-size: var(--text-lg);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-3);
  padding-top: var(--space-4);
}

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

/* ========== VALUES ========== */
.values-list {
  display: grid;
  grid-template-columns: 1fr 1fr;
  gap: var(--space-6);
}

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

.value-icon {
  width: 24px;
  height: 24px;
  color: var(--color-primary);
  flex-shrink: 0;
  margin-top: 2px;
}

.value-item h3 {
  font-family: var(--font-display);
  font-size: var(--text-base);
  font-weight: 600;
  color: var(--color-text);
  margin-bottom: var(--space-1);
}

.value-item p {
  font-size: var(--text-sm);
  color: var(--color-text-muted);
  line-height: 1.5;
}

/* ========== CTA BANNER ========== */
.cta-banner {
  background: var(--color-brand);
  border-radius: var(--radius-xl);
  padding: var(--space-12) var(--space-8);
  text-align: left;
  display: grid;
  grid-template-columns: 1fr auto;
  align-items: center;
  gap: var(--space-8);
}

.cta-banner h2 {
  font-family: var(--font-display);
  font-size: var(--text-xl);
  font-weight: 700;
  color: #ffffff;
  margin-bottom: var(--space-3);
}

.cta-banner p {
  font-size: var(--text-base);
  color: var(--color-brand-lighter);
  line-height: 1.6;
  max-width: 50ch;
}

.cta-details {
  display: flex;
  flex-direction: column;
  gap: var(--space-2);
  margin-top: var(--space-4);
}

.cta-detail {
  display: flex;
  align-items: center;
  gap: var(--space-2);
  font-size: var(--text-sm);
  color: var(--color-brand-lighter);
}

.cta-detail svg {
  width: 16px;
  height: 16px;
  color: #bac6e4;
  flex-shrink: 0;
}

.cta-banner .btn-primary {
  background: #ffffff;
  color: var(--color-brand);
}
.cta-banner .btn-primary:hover {
  background: #eef0f7;
  color: var(--color-brand);
}

/* ========== FOOTER ========== */
.footer {
  padding: var(--space-8) var(--space-6);
  border-top: 1px solid var(--color-divider);
}

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

.footer-left {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.footer-copy {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
}

.footer-right {
  display: flex;
  align-items: center;
  gap: var(--space-6);
}

.footer-right a {
  font-size: var(--text-xs);
  color: var(--color-text-faint);
  text-decoration: none;
}
.footer-right a:hover {
  color: var(--color-text-muted);
}

/* ========== SCROLL ANIMATIONS ========== */
.reveal {
  opacity: 0;
  transform: translateY(20px);
  transition: opacity 0.6s cubic-bezier(0.16, 1, 0.3, 1),
              transform 0.6s cubic-bezier(0.16, 1, 0.3, 1);
}

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

/* ========== MOBILE ========== */
@media (max-width: 768px) {
  .hero-content {
    padding: var(--space-16) var(--space-5) var(--space-12);
  }

  .hero h1 {
    font-size: var(--text-2xl);
  }

  .problem-grid {
    grid-template-columns: 1fr;
    gap: var(--space-6);
  }

  .services-grid {
    grid-template-columns: 1fr;
  }

  .steps {
    grid-template-columns: 1fr;
    gap: var(--space-10);
  }

  .values-list {
    grid-template-columns: 1fr;
  }

  .cta-banner {
    grid-template-columns: 1fr;
    text-align: left;
    padding: var(--space-8) var(--space-6);
  }

  .cta-banner .btn {
    align-self: start;
  }

  .footer-inner {
    flex-direction: column;
    align-items: flex-start;
    gap: var(--space-4);
  }

  .header-inner {
    padding: var(--space-3) var(--space-4);
  }
}

@media (max-width: 480px) {
  .cta-group {
    flex-direction: column;
  }
  .cta-group .btn {
    width: 100%;
  }
}