:root {
  /* Typography */
  --font_family: 'Inter', sans-serif;
  --font_size: 16px;

  /* Background */
  --background_color: #0d1117;
  --background_image: url("../img/wallpaper.jpg");
  --background_overlay: rgba(13, 17, 23, 0.8);

  /* Text */
  --title_color: #ffffff;
  --description_color: #a5b4fc; /* Light Indigo */
  --text_color: #e5e7eb; /* Gray-200 */
  --muted_text_color: #9ca3af; /* Gray-400 */

  /* Image */
  --image_border_color: rgba(255, 255, 255, 0.05);
  --image_border_px: 2px;
  --image_width: 160px;
  --image_height: 160px;

  /* Icons */
  --svg_color: #d1d5db; /* Gray-300 */

  /* Menu */
  --menu_background_color: rgba(255, 255, 255, 0.04);
  --menu_text_color: #d1d5db;
  --menu_active_text_color: #6366f1; /* Indigo-500 */

  /* Buttons */
  --button_background_color: rgba(255, 255, 255, 0.06);
  --button_text_color: #ffffff;
  --button_text_hover_color: #6366f1;

  /* Footer */
  --footer_background_color: rgba(255, 255, 255, 0.03);
  --footer_text_color: #cbd5e1; /* Gray-300 */
  --footer_link_text_color: #6366f1;

  /* UI */
  --border_radius: 0.6rem;
  --shadow: 0 4px 16px rgba(0, 0, 0, 0.2);
  --transition: 0.2s ease-in-out;
}


/* ===== BASE ===== */
body {
  padding-top: 50px;
  font: var(--font_size) var(--font_family);
  font-weight: 400;
  line-height: 1.6;
  /* background: linear-gradient(135deg, #0f172a, #4338ca); */

  background: linear-gradient(304deg, #000715, #43312b); /* Clean slate-blue gradient */
  color: var(--text_color);
  min-height: 100vh;
  display: flex;
  flex-direction: column;
}

/* ===== FLEX HELPERS ===== */
.flex_column_center {
  display: flex;
  flex-direction: column;
  align-items: center;
  justify-content: center;
}

.flex_row_center {
  display: flex;
  flex-direction: row;
  flex-wrap: wrap;
  justify-content: center;
  align-items: center;
}

.flex_no_wrap_row_center {
  display: flex;
  flex-direction: row;
  flex-wrap: nowrap;
  justify-content: center;
  align-items: center;
}

/* ===== HEADER ===== */
.header_img {
  padding-top: 1em;
}

.header_img img {
  height: var(--image_height);
  width: var(--image_width);
  border: var(--image_border_px) solid var(--image_border_color);
  border-radius: 50%;
  object-fit: cover;
  box-shadow: var(--shadow);
  margin-bottom: 0.5em;
}

.header_text h1 {
  font-size: 2rem;
  font-weight: 700;
  color: var(--title_color);
  margin: 0.3em 0;
}

.header_text h2 {
  font-size: 1.1rem;
  font-weight: 500;
  color: var(--description_color);
  margin: 0;
}

/* ===== SOCIAL ICONS ===== */
.header_svg_list {
  padding-top: 1em;
  display: flex;
  gap: 1em;
}

.header_svg_item {
  width: 2.1em;
  height: 2.1em;
  transition: transform var(--transition);
  cursor: pointer;
}

.header_svg_item svg {
  fill: var(--svg_color);
  transition: fill var(--transition);
}

.header_svg_item:hover {
  transform: scale(1.15);
}

/* ===== MENU ===== */
.header_nav_menu_list {
  display: flex;
  justify-content: center;
  padding-top: 1em;
  margin: 0 1em;
  gap: 0.5em;
  flex-wrap: wrap;
}

.header_nav_menu_item {
  background-color: var(--menu_background_color);
  color: var(--menu_text_color);
  padding: 0.6em 1.2em;
  font-size: 1rem;
  border-radius: var(--border_radius);
  cursor: pointer;
  transition: all var(--transition);
}

.header_nav_menu_item:hover {
  color: var(--menu_active_text_color);
  background-color: rgba(255, 255, 255, 0.08);
}

#header_nav_menu_item_1 {
  color: var(--menu_active_text_color);
}

/* ===== MAIN ===== */
main {
  margin-bottom: auto;
}

#main_section_container_2, #main_section_container_3 {
 display: none;
}


.main_a_item {
  text-decoration: none;
}

.main_text_item,
.main_button_item,
.main_small_button_item {
  color: var(--button_text_color);
  background-color: var(--button_background_color);
  padding: 1em;
  margin-top: 1em;
  text-align: center;
  border-radius: var(--border_radius);
  box-shadow: var(--shadow);
  transition: all var(--transition);
  width: 41em;
  min-height: 3.7em;
}

.main_button_item,
.main_small_button_item {
  cursor: pointer;
}

.main_button_item:hover,
.main_small_button_item:hover {
  color: var(--button_text_hover_color);
  background-color: rgba(255, 255, 255, 0.08);
  transform: translateY(-2px);
}

.main_small_button_list {
  display: flex;
  flex-direction: row;
  gap: 10px;
  margin-top: 1em;
}

.main_small_button_item {
  width: calc(41em / 2 - 5px);
}

/* ===== FOOTER ===== */
.footer_div_item {
  background: var(--footer_background_color);
  color: var(--footer_text_color);
  padding: 1em;
  margin-top: 2em;
  text-align: center;
  font-size: 0.9rem;
}

.footer_a_item {
  color: var(--footer_link_text_color);
  text-decoration: underline;
  transition: color var(--transition);
}

.footer_a_item:hover {
  color: var(--button_text_hover_color);
}

/* ===== RESPONSIVE ===== */
@media (max-width: 768px) {
  .main_text_item,
  .main_button_item,
  .main_small_button_item {
    width: 92vw;
  }

  .main_small_button_item {
    width: calc(92vw / 2 - 5px);
  }

  .header_h_item {
    width: 92vw;
    text-align: center;
  }

  .header_nav_menu_list {
    flex-direction: column;
    gap: 0.6em;
  }
}