/* -------- GLOBAL RESET -------- */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

html, body {
  background: #0e1625;
  font-family: "Inter", system-ui, sans-serif;
  color: #f2f5fa;
  min-height: 100%;
  scroll-behavior: smooth;
}

/* -------- TOP NAVIGATION BAR -------- */
.top-nav {
  width: 100%;
  background: #0d1524;
  border-bottom: 1px solid #1d2944;
  padding: 12px 20px;
  display: flex;
  justify-content: space-between;
  align-items: center;
  position: sticky;
  top: 0;
  z-index: 999;
}

.nav-left {
  display: flex;
  align-items: center;
  gap: 10px;
}

.nav-logo {
  width: 32px;
  height: 32px;
  border-radius: 8px;
}

.nav-title {
  font-size: 18px;
  font-weight: 600;
  color: #dce7f7;
}

.nav-links a {
  color: #a9c4e2;
  margin: 0 12px;
  text-decoration: none;
  font-size: 16px;
  transition: 0.2s;
}

.nav-links a:hover {
  color: #7fc6ff;
}

.nav-links a:not(:last-child)::after {
  content: "|";
  color: #3c4e6e;
  margin-left: 12px;
  font-weight: 300;
}

/* MOBILE NAV */
.hamburger {
  display: none;
  font-size: 26px;
  color: #dce7f7;
  cursor: pointer;
}

@media (max-width: 850px) {
  .nav-links {
    display: none;
    position: absolute;
    top: 58px;
    right: 0;
    background: #0d1524;
    width: 100%;
    padding: 15px 0;
    text-align: center;
    flex-direction: column;
  }

  .nav-links a {
    display: block;
    padding: 12px 0;
    font-size: 18px;
  }

  .nav-links a:not(:last-child)::after {
    display: none;
  }

  .hamburger {
    display: block;
  }
}

.nav-links.active {
  display: flex !important;
}

/* -------- HEADER -------- */
.head {
  text-align: center;
  padding: 40px 10px 20px;
}

.logo {
  width: 70px;
  height: 70px;
  margin-bottom: 10px;
}

.tagline {
  color: #b6bdc9;
  font-size: 14px;
  margin-top: 6px;
}

/* -------- TOOL LAYOUT -------- */
.tool-container {
  max-width: 1200px;
  margin: auto;
  padding: 20px;
  display: grid;
  grid-template-columns: 1fr 320px 1fr;
  gap: 25px;
}

@media (max-width: 900px) {
  .tool-container {
    grid-template-columns: 1fr;
  }
}

/* -------- UPLOAD / DRAG AREA -------- */
.drop-area {
  border: 2px dashed #3a4459;
  background: #111a2e;
  padding: 40px 15px;
  text-align: center;
  border-radius: 10px;
  cursor: pointer;
  transition: 0.2s;
}

.drop-area:hover {
  background: #16223b;
  border-color: #4ad2ff;
}

.drop-area h2 {
  font-size: 22px;
  margin-bottom: 8px;
}

.drop-area p {
  color: #a3abba;
  font-size: 14px;
}

.drop-area.active {
  border-color: #00c3ff;
  background: #102742;
}

/* -------- SETTINGS PANEL -------- */
.settings {
  background: #131d32;
  padding: 20px;
  border-radius: 10px;
  height: fit-content;
  border: 1px solid #1d2944;
}

.settings h3 {
  margin-bottom: 12px;
  color: #7fc6ff;
}

.settings label {
  display: block;
  margin-top: 14px;
  margin-bottom: 6px;
  font-size: 14px;
  color: #c2c8d6;
}

.settings input,
.settings select {
  width: 100%;
  padding: 10px;
  border-radius: 8px;
  border: 1px solid #2b3b5a;
  background: #0f1829;
  color: #e8ecf4;
  font-size: 14px;
}

.settings input:focus,
.settings select:focus {
  outline: none;
  border-color: #4ad2ff;
}

/* Target-size input */
#targetSizeKB {
  appearance: textfield;
  -moz-appearance: textfield;
}

/* -------- PREVIEW SECTION -------- */
.preview-section {
  background: #111a2e;
  padding: 20px;
  border-radius: 10px;
  border: 1px solid #1d2944;
  text-align: center;
}

.preview-section h3 {
  margin-bottom: 15px;
  color: #7fc6ff;
}

.preview-img {
  max-width: 100%;
  max-height: 350px;
  border-radius: 10px;
  border: 1px solid #1e2c47;
  display: block;
  margin: auto;
}

#previewInfo {
  margin-top: 12px;
  color: #a3abba;
  font-size: 14px;
}

/* -------- BUTTONS -------- */
.actions {
  text-align: center;
  margin: 25px 0;
}

.btn {
  padding: 12px 25px;
  margin: 0 10px;
  background: #1f2a44;
  color: #d7e3ff;
  font-size: 15px;
  border-radius: 8px;
  border: 1px solid #324364;
  cursor: pointer;
  transition: 0.2s;
}

.btn:hover {
  background: #273556;
}

.btn.disabled {
  opacity: 0.45;
  cursor: not-allowed;
}

/* -------- LOADING OVERLAY -------- */
.loading-overlay {
  position: fixed;
  top: 0;
  left: 0;
  width: 100%;
  height: 100%;
  background: rgba(5, 10, 20, 0.8);
  backdrop-filter: blur(6px);
  display: flex;
  flex-direction: column;
  justify-content: center;
  align-items: center;
  z-index: 9999;
  opacity: 1;
  transition: opacity 0.3s ease;
}

.loading-overlay.hidden {
  opacity: 0;
  pointer-events: none;
}

.spinner {
  width: 60px;
  height: 60px;
  border: 6px solid rgba(255, 255, 255, 0.2);
  border-top-color: #4acbff;
  border-radius: 50%;
  animation: spin 0.9s linear infinite;
  margin-bottom: 15px;
}

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

.loading-overlay p {
  color: #d0e7ff;
  font-size: 16px;
  letter-spacing: 0.5px;
}

/* -------- SEO SECTION -------- */
.seo-section {
  max-width: 900px;
  margin: 50px auto;
  padding: 25px;
  background: #101a2e;
  border: 1px solid #1c2a44;
  border-radius: 14px;
  color: #d6deea;
  line-height: 1.7;
}

.seo-section h2 {
  font-size: 28px;
  margin-bottom: 15px;
  color: #7fc6ff;
}

.seo-section h3 {
  font-size: 22px;
  margin-top: 25px;
  margin-bottom: 10px;
  color: #9ac9ff;
}

/* -------- FOOTER -------- */
footer {
  text-align: center;
  padding: 25px 10px;
  font-size: 13px;
  color: #8f9ab2;
}

/* -------- SCROLLBAR -------- */
::-webkit-scrollbar {
  width: 8px;
}
::-webkit-scrollbar-track {
  background: #0b1220;
}
::-webkit-scrollbar-thumb {
  background: #23324d;
  border-radius: 10px;
}
::-webkit-scrollbar-thumb:hover {
  background: #2f4368;
}
/* -------- CONTACT FORM -------- */

.contact-form {
  margin-top: 20px;
  background: #0f1829;
  padding: 25px;
  border-radius: 12px;
  border: 1px solid #243550;
}

.contact-form .form-group {
  margin-bottom: 18px;
}

.contact-form label {
  display: block;
  margin-bottom: 6px;
  font-size: 14px;
  color: #c2c8d6;
}

.contact-form input,
.contact-form textarea {
  width: 100%;
  padding: 12px;
  border-radius: 8px;
  border: 1px solid #2b3b5a;
  background: #111a2e;
  color: #e8ecf4;
  font-size: 15px;
}

.contact-form input:focus,
.contact-form textarea:focus {
  outline: none;
  border-color: #4ad2ff;
}

.contact-form textarea {
  height: 130px;
  resize: vertical;
}

/* Button */
.send-btn {
  display: inline-block;
  padding: 12px 26px;
  background: #1f2a44;
  border: 1px solid #324364;
  border-radius: 8px;
  color: #d7e3ff;
  font-size: 15px;
  cursor: pointer;
  transition: 0.2s ease;
}

.send-btn:hover {
  background: #273556;
}
.vertical-footer {
  padding: 30px 0;
  text-align: center;
  background: #0d1524;
  border-top: 1px solid #1d2944;
  margin-top: 40px;
}

.vertical-footer ul {
  list-style: none;
  padding: 0;
  margin: 0;
}

.vertical-footer ul li {
  margin: 8px 0;
}

.vertical-footer ul li a {
  color: #a9c4e2;
  text-decoration: none;
  font-size: 16px;
  transition: 0.2s;
}

.vertical-footer ul li a:hover {
  color: #7fc6ff;
}

.vertical-footer p {
  margin-top: 18px;
  font-size: 13px;
  color: #8f9ab2;
}

/* Dropdown container */
.dropdown {
  position: relative;
  display: inline-block;
}

/* Dropdown button */
.dropbtn {
  background: none;
  border: none;
  color: #a9c4e2;
  font-size: 16px;
  cursor: pointer;
  padding: 8px 12px;
}

.dropbtn:hover {
  color: #7fc6ff;
}

/* Dropdown content */
.dropdown-content {
  display: none;
  position: absolute;
  background-color: #0d1524;
  min-width: 180px;
  border: 1px solid #1d2944;
  border-radius: 8px;
  z-index: 9999;
  text-align: left;
}

.dropdown-content a {
  color: #a9c4e2;
  padding: 10px 14px;
  text-decoration: none;
  display: block;
  font-size: 15px;
}

.dropdown-content a:hover {
  background: #16223b;
  color: #7fc6ff;
}

/* Show dropdown on hover (desktop) */
.dropdown:hover .dropdown-content {
  display: block;
}

/* MOBILE SUPPORT */
@media (max-width: 850px) {
  .dropdown {
    width: 100%;
  }

  .dropdown-content {
    position: relative;
    width: 100%;
    border: none;
    background: transparent;
  }

  .dropdown-content a {
    padding: 14px 0;
    border-bottom: 1px solid #1d2944;
  }
}
/* ---------------- DROPDOWN MENU ---------------- */
.dropdown {
  position: relative;
  display: inline-block;
}

.dropbtn {
  background: none;
  border: none;
  color: #a9c4e2;
  font-size: 16px;
  cursor: pointer;
  padding: 10px 14px;
}

.dropbtn:hover {
  color: #7fc6ff;
}

.dropdown-content {
  display: none;
  position: absolute;
  background: #0d1524;
  min-width: 180px;
  border: 1px solid #1d2944;
  border-radius: 8px;
  box-shadow: 0px 8px 16px rgba(0,0,0,0.4);
  z-index: 9999;
}

.dropdown-content a {
  display: block;
  padding: 10px 14px;
  text-decoration: none;
  color: #dce7f7;
  font-size: 15px;
}

.dropdown-content a:hover {
  background: #16223b;
}

.dropdown:hover .dropdown-content {
  display: block;
}

/* -------- MOBILE MENU SUPPORT -------- */
@media (max-width: 850px) {
  .dropdown-content {
    position: relative;
    width: 100%;
    border-radius: 0;
    box-shadow: none;
    border: none;
  }
}