/* ===== ROOT VARIABLES ===== */
:root {
  --bg: #f4f6fb;
  --text: #222;
  --card: #fff;
  --accent: #4f5bff;
  --border: #dcdfff;

  --footer-bg: #222;
  --footer-text: #aaa;
}

/* ===== DARK MODE ===== */
@media (prefers-color-scheme: dark) {
  :root {
    --bg: #0f1115;
    --text: #eaeaea;
    --card: #232730;
    --border: #3a3f8f;

    --footer-bg: #000;
    --footer-text: rgba(255, 255, 255, 0.7);
  }
}

/* ===== RESET ===== */
* {
  box-sizing: border-box;
  font-family: Arial, sans-serif;
  margin: 0;
  padding: 0;
}

html, body {
  min-height: 100%;
}

/* ===== BODY ===== */
body {
  background: var(--bg);
  color: var(--text);
  padding: 0;
  padding-top: 72px; /* ✅ navbar space fix */
}

/* ===== NAVBAR ===== */
.navbar{
  position:fixed;      /* ✅ FIXED */
  top:0;
  left:0;
  width:100%;
  z-index:1000;
  background:rgba(0,0,0,0.35);
  backdrop-filter:blur(10px);
}

@media (prefers-color-scheme: dark){
  .navbar{
    background:rgba(0,0,0,0.6);
  }
}

.nav-container{
  max-width:1100px;
  margin:auto;
  padding:14px 18px;
  display:flex;
  align-items:center;
  justify-content:space-between;
}

.logo{
  color:#fff;
  font-size:18px;
  font-weight:bold;
  text-decoration:none;
}

/* ===== HAMBURGER BUTTON ===== */
.menu-btn{
  width:28px;
  height:22px;
  position:relative;
  cursor:pointer;
}

.menu-btn span{
  position:absolute;
  height:3px;
  width:100%;
  background:#fff;
  border-radius:2px;
  transition:0.3s;
}

.menu-btn span:nth-child(1){ top:0 }
.menu-btn span:nth-child(2){ top:9px }
.menu-btn span:nth-child(3){ top:18px }

/* ===== CROSS STATE ===== */
.menu-btn.active span:nth-child(1){
  transform:rotate(45deg);
  top:9px;
}
.menu-btn.active span:nth-child(2){
  opacity:0;
}
.menu-btn.active span:nth-child(3){
  transform:rotate(-45deg);
  top:9px;
}

/* ===== MENU ===== */
.nav-menu{
  display:none;
  flex-direction:column;
  background:rgba(0,0,0,0.95);
}

.nav-menu a{
  padding:14px 20px;
  color:#fff;
  text-decoration:none;
  border-bottom:1px solid rgba(255,255,255,0.1);
}

.nav-menu a:hover{
  background:rgba(255,255,255,0.1);
}

/* ===== DESKTOP ===== */
@media(min-width:768px){
  .menu-btn{display:none}

  .nav-menu{
    display:flex !important;
    flex-direction:row;
    background:none;
    justify-content:center;
    padding-bottom:10px;
  }

  .nav-menu a{
    border:none;
    padding:0 14px;
  }
}

/* ===== CONTAINER ===== */
.container {
  max-width: 850px;
  margin: 20px auto;
  background: var(--card);
  padding: 20px;
  border-radius: 14px;
}

/* ===== HEADINGS ===== */
h1 {
  text-align: center;
}

.sub {
  text-align: center;
  font-size: 14px;
  opacity: 0.8;
}

/* ===== BUTTON ===== */
.btn {
  background: var(--accent);
  color: #fff;
  border: none;
  padding: 10px 16px;
  border-radius: 6px;
  cursor: pointer;
  font-weight: bold;
  margin: 5px 0;
  text-decoration: none;
  display: inline-block;
}

/* ===== UPLOAD BOX ===== */
.upload-box {
  border: 2px dashed var(--accent);
  padding: 20px;
  text-align: center;
  margin: 20px 0;
  border-radius: 10px;
}

input[type="file"] {
  display: none;
}

/* ===== OPTIONS ===== */
.options {
  margin: 15px 0;
  font-size: 14px;
}

.options-row {
  display: flex;
  align-items: center;
  gap: 8px;
  margin: 8px 0;
}

.options-row input[type="number"],
.options-row select {
  width: 80px;
  padding: 6px;
}

/* ===== SIZE BUTTONS ===== */
.sizes {
  display: grid;
  grid-template-columns: repeat(auto-fit, minmax(110px, 1fr));
  gap: 10px;
  margin: 15px 0;
}

.size-btn {
  border: 1px solid var(--border);
  padding: 8px;
  text-align: center;
  cursor: pointer;
  border-radius: 6px;
}

.size-btn.active {
  background: var(--accent);
  color: #fff;
}

/* ===== PREVIEW ===== */
.preview {
  display: none;
  margin-top: 15px;
}

.preview img {
  max-width: 100%;
  border: 1px solid var(--border);
  border-radius: 8px;
}

/* ===== PROCESSING ===== */
#processing {
  display: none;
  color: var(--accent);
  margin-top: 10px;
  text-align: center;
}

/* ===== SEO TEXT ===== */
.seo-text {
  margin-top: 30px;
  font-size: 15px;
  line-height: 1.6;
  background: var(--card);
  color: var(--text);
  padding: 20px;
  border-radius: 10px;
  border: 1px solid var(--border);
}

/* ===== FOOTER ===== */
footer {
  background: var(--footer-bg);
  color: var(--footer-text);
  text-align: center;
  padding: 15px;
  font-size: 15px;
  width:100%;
  margin-top:30px;
}

footer a {
  color: var(--footer-text);
  text-decoration: none;
  margin: 0 6px;
}

footer a:hover {
  text-decoration: underline;
}

/* ===== RESPONSIVE ===== */
@media (max-width: 600px) {
  body {
    padding-top: 72px;
  }
  .container {
    padding: 16px;
  }
}