:root {
  --color-accent-from: #30dddd;
  --color-accent-to: #a966ef;

  /* === LIGHT MODE === */
  --color-bg: #ffffff;
  --color-bg-secondary: #f5f5f5;
  --color-text: #111111;
  --color-text-muted: rgba(17, 17, 17, 0.6);
  --color-border: rgba(17, 17, 17, 0.15);
  --color-btn-hover-text: #ffffff;
}

[data-theme="dark"] {
  --color-bg: #111111;
  --color-bg-secondary: #1c1c1c;
  --color-text: #f0f0f0;
  --color-text-muted: rgba(240, 240, 240, 0.55);
  --color-border: rgba(240, 240, 240, 0.15);
  --color-btn-hover-text: #ffffff;
}

/* === BASE === */
body {
  background-color: var(--color-bg);
  color: var(--color-text);
  transition:
    background-color 0.3s ease,
    color 0.3s ease;
}

/* === GRADIENT-TEXT HELPER === */
.gradient-text {
  background: linear-gradient(
    to right,
    var(--color-accent-from),
    var(--color-accent-to)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* === NAV LINK HOVER === */
.nav-link {
  position: relative;
  transition: opacity 0.2s ease;
}
.nav-link:hover {
  background: linear-gradient(
    to right,
    var(--color-accent-from),
    var(--color-accent-to)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}

/* === OUTLINE BUTTON === */
.btn-outline-custom {
  border: 1px solid var(--color-border);
  border-radius: 9999px;
  padding: 0.75rem 3rem;
  font-size: 1rem;
  font-weight: 300;
  letter-spacing: 0.1em;
  text-transform: uppercase;
  background: transparent;
  color: var(--color-text);
  cursor: pointer;
  transition: all 0.3s ease;
  display: inline-block;
  text-decoration: none;
}
.btn-outline-custom:hover {
  border-color: transparent;
  background: linear-gradient(
    to right,
    rgba(48, 221, 221, 0.6),
    rgba(169, 102, 239, 0.6)
  );
  color: var(--color-btn-hover-text);
}

/* === CARD === */
.project-card {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  border-radius: 1rem;
  overflow: hidden;
  transition:
    transform 0.3s ease,
    box-shadow 0.3s ease;
}
.project-card:hover {
  transform: scale(1.04);
  box-shadow: 0 20px 40px rgba(0, 0, 0, 0.12);
}

/* === THEME TOGGLE BUTTON === */
#theme-toggle {
  background-color: var(--color-bg);
  border: 1px solid var(--color-border);
  color: var(--color-text);
  border-radius: 9999px;
  width: 3.25rem;
  height: 3.25rem;
  display: flex;
  align-items: center;
  justify-content: center;
  cursor: pointer;
  transition: all 0.3s ease;
  box-shadow: 0 4px 12px rgba(0, 0, 0, 0.1);
}
#theme-toggle:hover {
  box-shadow: 0 6px 20px rgba(0, 0, 0, 0.15);
}

/* === MOBILE MENU === */
#mobile-menu {
  background-color: var(--color-bg);
}

/* === FOOTER LINKS === */
.footer-link:hover {
  background: linear-gradient(
    to right,
    var(--color-accent-from),
    var(--color-accent-to)
  );
  -webkit-background-clip: text;
  -webkit-text-fill-color: transparent;
  background-clip: text;
}