/* =============================================
   BrandDid Digital – style.css
   Core: variables, reset, typography, utilities, buttons
   ============================================= */

/* ===== CSS VARIABLES ===== */
:root {
  --bg-dark:       #FFFFFF;
  --bg-secondary:  #F8FAFC;
  --bg-card:       #FFFFFF;
  --primary:       #ff5a00;
  --primary-dark:  #e14d00;
  --primary-soft:  #ffefe5;
  --green:         #22c55e;
  --blue:          #00bfff;
  --orange:        #ff5a00;
  --white:         #FFFFFF;
  --gray:          #475569;
  --gray-dim:      #94A3B8;
  --border:        #E5E7EB;
  --heading-color: #0F172A;
  --glow-primary:  rgba(255,90,0,0.10);
  --glow-secondary:rgba(225,77,0,0.08);
  --font-display:  'Inter', sans-serif;
  --font-body:     'Inter', sans-serif;
  --radius:        16px;
  --radius-sm:     10px;
  --shadow-card:   0 4px 24px rgba(15,23,42,0.08);
  --shadow-hover:  0 12px 40px rgba(15,23,42,0.14);
  --transition:    0.35s cubic-bezier(0.4,0,0.2,1);
}

/* ===== RESET & BASE ===== */
*, *::before, *::after { box-sizing: border-box; margin: 0; padding: 0; }

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

body {
  font-family: var(--font-body);
  background-color: var(--bg-dark);
  color: var(--heading-color);
  overflow-x: hidden;
  line-height: 1.65;
  -webkit-font-smoothing: antialiased;
}

a { color: inherit; text-decoration: none; }
img { display: block; max-width: 100%; }
ul { list-style: none; }
button { font-family: inherit; cursor: pointer; border: none; background: none; }

/* ===== LOGO IMAGE ===== */
.site-logo {
  height: 40px;
  width: auto;
  display: block;
  image-rendering: -webkit-optimize-contrast;
}
.site-logo--footer {
  height: 36px;
  filter: brightness(0) invert(1);
}

/* ===== SCROLLBAR ===== */
::-webkit-scrollbar { width: 6px; }
::-webkit-scrollbar-track { background: #F1F5F9; }
::-webkit-scrollbar-thumb { background: var(--primary); border-radius: 10px; }

/* ===== UTILITY ===== */
.container {
  max-width: 1200px;
  margin: 0 auto;
  padding: 0 24px;
}

.gradient-text {
  background: linear-gradient(135deg, #ff5a00 0%, #e14d00 100%);
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

.glass-card {
  background: #FFFFFF;
  border: 1px solid var(--border);
  border-radius: var(--radius);
  box-shadow: var(--shadow-card);
}

.section-overline {
  font-family: var(--font-display);
  font-size: 0.8rem;
  font-weight: 600;
  letter-spacing: 0.18em;
  text-transform: uppercase;
  color: var(--primary);
  margin-bottom: 12px;
}

.section-header {
  text-align: center;
  max-width: 680px;
  margin: 0 auto 64px;
}

.section-title {
  font-family: var(--font-display);
  font-size: clamp(2rem, 4vw, 3rem);
  font-weight: 800;
  line-height: 1.2;
  letter-spacing: -0.02em;
  margin-bottom: 16px;
  color: var(--heading-color);
}

.section-subtitle {
  color: var(--gray);
  font-size: 1.05rem;
  line-height: 1.7;
}

.mt-4 { margin-top: 32px; }

/* ===== BUTTONS ===== */
.btn-primary {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  background: linear-gradient(135deg, #ff5a00 0%, #e14d00 100%);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: 50px;
  transition: var(--transition);
  position: relative;
  overflow: hidden;
  box-shadow: 0 4px 18px rgba(255,90,0,0.30);
}
.btn-primary:hover { transform: translateY(-4px) scale(1.03); box-shadow: 0 10px 28px rgba(255,90,0,0.35); }

.btn-ghost {
  display: inline-flex;
  align-items: center;
  gap: 8px;
  padding: 14px 28px;
  background: transparent;
  color: var(--heading-color);
  font-family: var(--font-display);
  font-weight: 600;
  font-size: 0.95rem;
  border: 1.5px solid var(--border);
  border-radius: 50px;
  transition: var(--transition);
}
.btn-ghost:hover {
  transform: translateY(-4px) scale(1.03);
  box-shadow: 0 8px 20px rgba(15,23,42,0.10);
}

.btn-lg { padding: 16px 36px; font-size: 1rem; }
.btn-xl { padding: 18px 44px; font-size: 1.1rem; }
.btn-full { width: 100%; justify-content: center; }

.btn-whatsapp {
  display: inline-flex;
  align-items: center;
  gap: 10px;
  padding: 14px 28px;
  background: linear-gradient(135deg, #25D366, #128C7E);
  color: #fff;
  font-family: var(--font-display);
  font-weight: 700;
  font-size: 0.95rem;
  border-radius: 50px;
  margin-top: 28px;
  transition: var(--transition);
  box-shadow: 0 0 20px rgba(37,211,102,0.2);
}
.btn-whatsapp:hover { transform: translateY(-2px); box-shadow: 0 0 36px rgba(37,211,102,0.4); }

/* ===== BACK TO TOP ===== */
.back-to-top {
  position: fixed;
  bottom: 20px;
  left: 20px;
  right: auto;
  width: 44px; height: 44px;
  background: linear-gradient(135deg, #ff5a00, #e14d00);
  color: #fff;
  border-radius: 50%;
  display: flex;
  align-items: center;
  justify-content: center;
  z-index: 999;
  opacity: 0;
  transform: translateY(20px);
  transition: opacity var(--transition), transform var(--transition);
  box-shadow: 0 4px 20px rgba(255,90,0,0.35);
}
.back-to-top.visible { opacity: 1; transform: translateY(0); }
.back-to-top:hover { transform: translateY(-4px); box-shadow: 0 8px 30px rgba(255,90,0,0.45); }