* {
    margin: 0;
    padding: 0;
    font-family: 'Segoe UI', Tahoma, Geneva, Verdana, sans-serif;
}

body {
    background: linear-gradient(135deg, #1e1e2f, #252538);
    padding-left: 20px;
    padding-right: 20px;
}

main {
    max-width: 800px;
    margin: auto;
    background: #2c2c44;
    padding: 25px;
    border-radius: 14px;
    box-shadow: 0 6px 12px rgba(0,0,0,0.6);
    margin-top: 20px;
}

.header {
  background-color: #222 !important;
  padding: 15px 20px !important;
}

.nav {
  display: flex !important;
  justify-content: center !important;
  gap: 30px !important;
  flex-wrap: wrap !important;
}

.nav-link {
  color: white !important;
  text-decoration: none !important;
  font-weight: 600 !important;
  font-size: 1.1rem !important;
  transition: color 0.3s !important;
  padding: 6px 10px !important;
  border-radius: 8px !important;
}

.nav-link:hover {
  color: #ffcc00 !important;
}

.nav-link.active {
  background-color: #ffcc00 !important;
  color: #222 !important;
}

.slider__title {
    text-align: center;
    color: #58a6ff;
    text-shadow: 0 2px 5px rgba(88, 166, 255, 0.5);
}

.slider__form {
    display: flex;
    flex-direction: column;
    gap: 15px;
    margin-top: 20px;
}

.file-input {
    padding: 14px;
    border: 2px dashed #555;
    border-radius: 12px;
    text-align: center;
    cursor: pointer;
    background: #1e1e2f;
    color: #ccc;
    transition: border-color 0.3s, background 0.3s;
}

.file-input:hover {
    border-color: #58a6ff;
    background: #252538;
}

.slider__btn {
    background: #58a6ff;
    color: #fff;
    border: none;
    padding: 12px;
    border-radius: 12px;
    cursor: pointer;
    font-size: 16px;
    font-weight: 700;
    box-shadow: 0 5px 15px rgba(88,166,255,0.5);
    transition: background 0.3s, box-shadow 0.3s;
}

.slider__btn:hover {
    background: #3f7ed4;
    box-shadow: 0 7px 20px rgba(88,166,255,0.7);
}

.preview-container {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 20px;
    margin-bottom: 20px;
    justify-content: center;
}

.preview-item {
    position: relative;
    width: 150px;
    height: 100px;
    border-radius: 12px;
    overflow: hidden;
    box-shadow: 0 4px 8px rgba(0,0,0,0.6);
    background: #1e1e2f;
}

.preview-item img {
    width: 100%;
    height: 100%;
    object-fit: cover;
}

.remove-btn {
    position: absolute;
    top: 5px;
    right: 5px;
    background: rgba(0,0,0,0.7);
    color: white;
    border: none;
    border-radius: 50%;
    width: 26px;
    height: 26px;
    cursor: pointer;
    font-size: 14px;
    display: flex;
    align-items: center;
    justify-content: center;
    transition: background 0.3s;
}

.remove-btn:hover {
    background: rgba(229, 83, 83, 0.9);
}

.slider__button {
    display: flex;
    margin: 0 auto;
    font-size: 18px;
    background-color: #ffcc00;
    color: #222;
    font-weight: 700;
    transition: all 0.3s ease-in-out;
    cursor: pointer;
    padding: 10px 20px;
    border-radius: 12px;
    border: none;
    box-shadow: 0 5px 15px rgba(255, 204, 0, 0.6);
}

.slider__button:hover {
    background-color: #e1b505;
    box-shadow: 0 7px 20px rgba(225, 181, 5, 0.8);
}

.slider-item {
    display: inline-block;
    margin: 10px;
    border: 1px solid #ddd;
    padding: 5px;
    border-radius: 8px;
    overflow: hidden;
    width: 200px;
    height: 150px;
}

.slider-img {
    width: 100%;
    height: 100%;
    object-fit: cover;
    display: block;
    border-radius: 8px;
}

.slider-item {
    display: inline-block;
    position: relative;
    margin: 10px;
    border: 1px solid #ddd;
    border-radius: 8px;
    overflow: hidden;
}

.slider-img {
    display: block;
    max-width: 250px;
    height: auto;
}

.slider-del-btn {
    display: block;
    width: 100%;
    padding: 8px;
    background-color: #d9534f;
    color: white;
    border: none;
    cursor: pointer;
    font-size: 14px;
    transition: background 0.3s;
    position: absolute;
    bottom: 1px;
}

.slider-del-btn:hover {
    background-color: #c9302c;
}

@media (max-width: 600px) {
  .nav {
    flex-direction: column;
    align-items: center;
    gap: 15px;
  }
  .nav-link {
    font-size: 1.2rem;
  }
}