/* ============================================
   BATU Teknologi Kreatif — Design Tokens
   Source: batuteknologi.web.id (WordPress theme v2.0)
   Updated: 2026-07-30
   ============================================ */

:root {
  /* ------------------------------------------
     1. COLOR PALETTE
     ------------------------------------------ */
  /* Brand / Primary */
  --btk-primary: #6366f1;
  --btk-primary-dark: #4f46e5;
  --btk-primary-light: #a5b4fc;
  --btk-secondary: #8b5cf6;

  /* Semantic */
  --btk-success: #10b981;
  --btk-warning: #f59e0b;
  --btk-error: #ef4444;

  /* Backgrounds */
  --btk-bg-dark: #0c0a1d;
  --btk-bg-dark-mid: #1a1a3e;
  --btk-bg-dark-end: #0f0c29;
  --btk-bg-white: #ffffff;
  --btk-bg-light: #f8fafc;
  --btk-bg-surface: #ffffff;

  /* Text */
  --btk-text-primary: #1e293b;
  --btk-text-secondary: #64748b;
  --btk-text-muted: #94a3b8;
  --btk-text-medium: #475569;
  --btk-text-on-dark: #ffffff;

  /* Borders */
  --btk-border: #e2e8f0;
  --btk-border-dark: #cbd5e1;

  /* Primary alpha utilities */
  --btk-primary-03: rgba(99, 102, 241, 0.03);
  --btk-primary-06: rgba(99, 102, 241, 0.06);
  --btk-primary-08: rgba(99, 102, 241, 0.08);
  --btk-primary-10: rgba(99, 102, 241, 0.10);
  --btk-primary-12: rgba(99, 102, 241, 0.12);
  --btk-primary-15: rgba(99, 102, 241, 0.15);
  --btk-primary-20: rgba(99, 102, 241, 0.20);
  --btk-primary-30: rgba(99, 102, 241, 0.30);
  --btk-primary-35: rgba(99, 102, 241, 0.35);
  --btk-primary-85: rgba(99, 102, 241, 0.85);

  /* White alpha utilities */
  --btk-white-06: rgba(255, 255, 255, 0.06);
  --btk-white-08: rgba(255, 255, 255, 0.08);
  --btk-white-12: rgba(255, 255, 255, 0.12);
  --btk-white-15: rgba(255, 255, 255, 0.15);
  --btk-white-20: rgba(255, 255, 255, 0.20);
  --btk-white-30: rgba(255, 255, 255, 0.30);
  --btk-white-40: rgba(255, 255, 255, 0.40);
  --btk-white-45: rgba(255, 255, 255, 0.45);
  --btk-white-55: rgba(255, 255, 255, 0.55);
  --btk-white-92: rgba(255, 255, 255, 0.92);

  /* ------------------------------------------
     2. GRADIENTS
     ------------------------------------------ */
  --btk-gradient-hero: linear-gradient(135deg, #0c0a1d 0%, #1a1a3e 40%, #0f0c29 100%);
  --btk-gradient-card-bar: linear-gradient(90deg, #6366f1, #8b5cf6);
  --btk-gradient-placeholder: linear-gradient(135deg, #1e1b4b, #312e81);

  /* ------------------------------------------
     3. TYPOGRAPHY
     ------------------------------------------ */
  --btk-font-family: 'Inter', -apple-system, BlinkMacSystemFont, 'Segoe UI', sans-serif;
  --btk-font-mono: 'JetBrains Mono', 'Fira Code', monospace;

  /* Font weights */
  --btk-weight-regular: 400;
  --btk-weight-medium: 500;
  --btk-weight-semibold: 600;
  --btk-weight-bold: 700;
  --btk-weight-extrabold: 800;

  /* Font sizes (fluid scale) */
  --btk-text-xs: 0.75rem;       /* 12px */
  --btk-text-sm: 0.8125rem;     /* 13px */
  --btk-text-base: 0.875rem;    /* 14px */
  --btk-text-md: 0.9375rem;     /* 15px */
  --btk-text-lg: 1rem;          /* 16px */
  --btk-text-xl: 1.0625rem;     /* 17px */
  --btk-text-2xl: 1.25rem;      /* 20px */
  --btk-text-3xl: 1.75rem;      /* 28px */
  --btk-text-4xl: 2rem;         /* 32px */
  --btk-text-5xl: 2.375rem;     /* 38px */
  --btk-text-6xl: 3.75rem;      /* 60px */

  /* Line heights */
  --btk-leading-tight: 1.12;
  --btk-leading-normal: 1.5;
  --btk-leading-relaxed: 1.7;
  --btk-leading-loose: 1.8;

  /* ------------------------------------------
     4. SPACING
     ------------------------------------------ */
  --btk-space-1: 0.25rem;      /* 4px */
  --btk-space-2: 0.5rem;       /* 8px */
  --btk-space-3: 0.75rem;      /* 12px */
  --btk-space-4: 1rem;         /* 16px */
  --btk-space-5: 1.25rem;      /* 20px */
  --btk-space-6: 1.5rem;       /* 24px */
  --btk-space-8: 2rem;         /* 32px */
  --btk-space-10: 2.5rem;      /* 40px */
  --btk-space-12: 3rem;        /* 48px */
  --btk-space-14: 3.5rem;      /* 56px */
  --btk-space-16: 4rem;        /* 64px */
  --btk-space-20: 5rem;        /* 80px */
  --btk-space-24: 6rem;        /* 96px */
  --btk-space-28: 7rem;        /* 112px */

  /* ------------------------------------------
     5. CONTAINER & LAYOUT
     ------------------------------------------ */
  --btk-container-max: 1140px;
  --btk-container-padding-desktop: 24px;
  --btk-container-padding-tablet: 16px;
  --btk-container-padding-mobile: 14px;

  /* Section spacing */
  --btk-section-padding-desktop: 100px;
  --btk-section-padding-tablet: 56px;
  --btk-section-padding-mobile: 48px;

  /* ------------------------------------------
     6. BORDER RADIUS
     ------------------------------------------ */
  --btk-radius-sm: 6px;
  --btk-radius-md: 10px;
  --btk-radius-lg: 16px;
  --btk-radius-xl: 20px;
  --btk-radius-pill: 30px;
  --btk-radius-full: 50%;

  /* ------------------------------------------
     7. SHADOWS
     ------------------------------------------ */
  --btk-shadow-sm: 0 1px 30px rgba(0, 0, 0, 0.06);
  --btk-shadow-md: 0 8px 25px rgba(99, 102, 241, 0.35);
  --btk-shadow-lg: 0 12px 40px rgba(0, 0, 0, 0.12);
  --btk-shadow-card-hover: 0 12px 40px rgba(99, 102, 241, 0.10);
  --btk-shadow-portfolio-hover: 0 12px 40px rgba(0, 0, 0, 0.06);
  --btk-shadow-testimonial-hover: 0 8px 30px rgba(0, 0, 0, 0.04);
  --btk-shadow-badge: 0 10px 30px rgba(99, 102, 241, 0.30);
  --btk-shadow-focus: 0 0 0 4px rgba(99, 102, 241, 0.08);

  /* ------------------------------------------
     8. TRANSITIONS
     ------------------------------------------ */
  --btk-transition-fast: all 0.3s ease;
  --btk-transition-slow: all 0.4s ease;
  --btk-transition-dropdown: all 0.25s ease;

  /* ------------------------------------------
     9. Z-INDEX LAYERS
     ------------------------------------------ */
  --btk-z-dropdown: 1000;
  --btk-z-navbar: 1000;
  --btk-z-mobile-menu: 999;
  --btk-z-overlay: 100;

  /* ------------------------------------------
     10. ICON SIZES
     ------------------------------------------ */
  --btk-icon-sm: 16px;
  --btk-icon-md: 20px;
  --btk-icon-lg: 24px;
}

/* ============================================
   UTILITY CLASSES
   ============================================ */

/* Container */
.btk-container {
  max-width: var(--btk-container-max);
  margin: 0 auto;
  padding: 0 var(--btk-container-padding-desktop);
}

@media (max-width: 768px) {
  .btk-container {
    padding: 0 var(--btk-container-padding-tablet);
  }
}

@media (max-width: 480px) {
  .btk-container {
    padding: 0 var(--btk-container-padding-mobile);
  }
}

/* Grid helpers */
.btk-grid-2 {
  display: grid;
  grid-template-columns: repeat(2, 1fr);
  gap: var(--btk-space-10);
}

.btk-grid-3 {
  display: grid;
  grid-template-columns: repeat(3, 1fr);
  gap: var(--btk-space-5);
}

@media (max-width: 1024px) {
  .btk-grid-3 { grid-template-columns: repeat(2, 1fr); }
}

@media (max-width: 768px) {
  .btk-grid-2,
  .btk-grid-3 { grid-template-columns: 1fr; }
}

/* Section padding */
.btk-section {
  padding: var(--btk-section-padding-desktop) 0;
}

@media (max-width: 768px) {
  .btk-section { padding: var(--btk-section-padding-tablet) 0; }
}

@media (max-width: 480px) {
  .btk-section { padding: var(--btk-section-padding-mobile) 0; }
}

/* Section tag (eyebrow pill) */
.btk-section-tag {
  display: inline-block;
  padding: 6px 16px;
  border-radius: var(--btk-radius-xl);
  background: var(--btk-primary-08);
  color: var(--btk-primary);
  font-size: var(--btk-text-xs);
  font-weight: var(--btk-weight-semibold);
  text-transform: uppercase;
  letter-spacing: 0.5px;
  margin-bottom: var(--btk-space-4);
}

/* ============================================
   BUTTONS
   ============================================ */

.btk-btn {
  display: inline-block;
  padding: 5px 32px;
  border-radius: var(--btk-radius-md);
  font-size: var(--btk-text-md);
  font-weight: var(--btk-weight-semibold);
  text-decoration: none;
  border: 2px solid transparent;
  cursor: pointer;
  transition: var(--btk-transition-fast);
  line-height: 1.5;
}

@media (max-width: 768px) {
  .btk-btn {
    padding: 11px 24px;
    border-radius: 9px;
    font-size: var(--btk-text-base);
  }
}

@media (max-width: 480px) {
  .btk-btn {
    padding: 11px 18px;
  }
}

.btk-btn-primary {
  background: var(--btk-primary);
  color: var(--btk-text-on-dark);
  border-color: var(--btk-primary);
}

.btk-btn-primary:hover {
  background: var(--btk-primary-dark);
  border-color: var(--btk-primary-dark);
  transform: translateY(-2px);
  box-shadow: var(--btk-shadow-md);
}

.btk-btn-outline {
  background: transparent;
  color: var(--btk-text-on-dark);
  border-color: var(--btk-white-20);
}

.btk-btn-outline:hover {
  border-color: var(--btk-text-on-dark);
  background: var(--btk-white-08);
  transform: translateY(-2px);
}

.btk-btn-lg {
  padding: 14px 32px;
  font-size: var(--btk-text-lg);
}

.btk-btn-block {
  width: 100%;
}

/* ============================================
   FORM ELEMENTS
   ============================================ */

.btk-input {
  padding: 12px 16px;
  border: 1.5px solid var(--btk-border);
  border-radius: var(--btk-radius-md);
  font-size: var(--btk-text-base);
  font-family: inherit;
  transition: var(--btk-transition-fast);
  outline: none;
  background: var(--btk-bg-light);
  color: var(--btk-text-primary);
}

.btk-input:focus {
  border-color: var(--btk-primary);
  background: var(--btk-bg-white);
  box-shadow: var(--btk-shadow-focus);
}

.btk-textarea {
  resize: vertical;
  min-height: 110px;
}

.btk-form-group {
  display: flex;
  flex-direction: column;
  gap: var(--btk-space-3);
}

/* ============================================
   CARDS
   ============================================ */

.btk-card {
  background: var(--btk-bg-white);
  border-radius: var(--btk-radius-lg);
  border: 1px solid var(--btk-border);
  transition: var(--btk-transition-slow);
}

.btk-card:hover {
  transform: translateY(-6px);
  box-shadow: var(--btk-shadow-card-hover);
}