/*!
 * common.css
 * Shared base styles used across ALL portfolio templates.
 * Keep this file generic (resets, variables, reusable components).
 * Template-specific look & feel belongs in each template's own
 * assets/css/style.css so templates never fight each other.
 */

/* ---------------------------------------------------
   1. Global design tokens (override per-template via
   a scoped [data-theme] block or by redeclaring in style.css)
--------------------------------------------------- */
:root {
  --font-base: "Segoe UI", Roboto, Helvetica, Arial, sans-serif;
  --color-bg: #ffffff;
  --color-text: #1a1a1a;
  --color-muted: #6c757d;
  --color-primary: #6d28d9;
  --color-primary-dark: #4c1d95;
  --transition-fast: 0.2s ease;
  --transition-med: 0.4s ease;
  --radius-sm: 6px;
  --radius-md: 12px;
  --radius-lg: 24px;
  --section-spacing: 6rem;
}

/* ---------------------------------------------------
   2. Reset / base
--------------------------------------------------- */
html {
  scroll-behavior: smooth;
}

body {
  font-family: var(--font-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  overflow-x: hidden;
}

img {
  max-width: 100%;
  height: auto;
}

a {
  text-decoration: none;
}

section {
  padding-top: var(--section-spacing);
  padding-bottom: var(--section-spacing);
}

.section-title {
  font-weight: 700;
  margin-bottom: 2.5rem;
}

/* ---------------------------------------------------
   3. Reusable components
--------------------------------------------------- */

/* Preloader */
#preloader {
  position: fixed;
  inset: 0;
  z-index: 9999;
  display: flex;
  align-items: center;
  justify-content: center;
  background: var(--color-bg);
  transition: opacity var(--transition-med), visibility var(--transition-med);
}

#preloader.is-hidden {
  opacity: 0;
  visibility: hidden;
  pointer-events: none;
}

.spinner {
  width: 42px;
  height: 42px;
  border: 4px solid rgba(0, 0, 0, 0.1);
  border-top-color: var(--color-primary);
  border-radius: 50%;
  animation: spin 0.8s linear infinite;
}

@keyframes spin {
  to {
    transform: rotate(360deg);
  }
}

/* Back to top button */
.btn-back-to-top {
  position: fixed;
  right: 1.5rem;
  bottom: 1.5rem;
  width: 46px;
  height: 46px;
  display: flex;
  align-items: center;
  justify-content: center;
  border-radius: 50%;
  background: var(--color-primary);
  color: #fff;
  font-size: 1.25rem;
  border: none;
  box-shadow: 0 6px 16px rgba(0, 0, 0, 0.2);
  opacity: 0;
  visibility: hidden;
  transform: translateY(12px);
  transition: opacity var(--transition-fast), transform var(--transition-fast),
    visibility var(--transition-fast);
  z-index: 999;
}

.btn-back-to-top.is-visible {
  opacity: 1;
  visibility: visible;
  transform: translateY(0);
}

.btn-back-to-top:hover {
  background: var(--color-primary-dark);
  color: #fff;
}

/* Scroll reveal (paired with common.js IntersectionObserver) */
[data-reveal] {
  opacity: 0;
  transform: translateY(24px);
  transition: opacity 0.6s ease, transform 0.6s ease;
}

[data-reveal].is-visible {
  opacity: 1;
  transform: translateY(0);
}

/* Sticky navbar shrink-on-scroll hook */
.navbar.is-scrolled {
  box-shadow: 0 2px 12px rgba(0, 0, 0, 0.08);
}

/* Simple utility helpers */
.text-muted-2 {
  color: var(--color-muted);
}

.rounded-lg {
  border-radius: var(--radius-lg) !important;
}

.rounded-md {
  border-radius: var(--radius-md) !important;
}