/* Color Variables (Theme from your previous input) */
:root {
    --dark-blue: #1a2035;
    --medium-blue: #232a41;
    --light-blue: #3e4a6e;
    --green: #1fc226;
    --red-bin: #ff1100;
    --red-dead: #1f0200;
    --orange-unknown: #ff9800;
    --yellow-btn: #ffc107;
    --orange-btn: #fd7e14;
    --text-color-light: #f8f9fa;
    --text-color-dark: #212529;
    --light: var(--dark-blue);
    --border: var(--light-blue);
    --shadow: rgba(0, 0, 0, 0.3);
    --lighter: var(--medium-blue);
    --text-muted: #aaaaaa;
    --text: var(--text-color-light);
}

/* Base & Typography */
*,
:after,
:before {
    box-sizing: border-box;
}

html {
    font-family: sans-serif;
    -ms-text-size-adjust: 100%;
    -webkit-text-size-adjust: 100%;
}

body {
    font-family: 'Poppins', sans-serif;
    background-color: var(--dark-blue);
    margin: 0;
    color: var(--text-color-light);
    padding: 20px;
}

/* Layout & Grid System */
.container {
    margin-right: auto;
    margin-left: auto;
    padding-left: 20px;
    padding-right: 20px;
}

@media (min-width:768px) {
    .container {
        width: 750px;
    }
}

@media (min-width:992px) {
    .container {
        width: 970px;
    }
    .col-md-4,
    .col-md-6,
    .col-md-8 {
        float: left;
    }
    .col-md-8 {
        width: 66.66666667%;
    }
    .col-md-6 {
        width: 50%;
    }
    .col-md-4 {
        width: 33.33333333%;
    }
    .col-md-offset-2 {
        margin-left: 16.66666667%;
    }
}

@media (min-width:1200px) {
    .container {
        width: 1170px;
    }
}

/*
    *** এইখানে পরিবর্তন করা হয়েছে ***
    কলামের মাঝখানের গ্যাপ কমানোর জন্য `row` এর নেগেটিভ মার্জিন এবং `col-*` এর প্যাডিং এর মান কমানো হয়েছে।
    আগে ছিল -15px/-15px এবং 15px/15px, এখন তা কমিয়ে -5px/-5px এবং 5px/5px করা হয়েছে।
*/
.row {
    margin-left: -5px;
    margin-right: -5px;
}

.col-md-4,
.col-md-6,
.col-md-8 {
    position: relative;
    min-height: 1px;
    padding-left: 5px;
    padding-right: 5px;
}

/*Navigation (Header)*/
.navigations {
    display: flex;
    justify-content: space-between;
    align-items: center;
    background-color: var(--medium-blue);
    padding: 0 2rem;
    height: 80px;
    margin-bottom: 30px;
    box-shadow: 0 2px 5px rgba(0, 0, 0, 0.2);
}

.site-header {
    display: flex;
    align-items: center;
    color: var(--text-color-light);
    font-size: 24px;
    font-weight: bold;
}

.menu-container {
    position: relative;
    display: inline-block;
    z-index: 999;
}

.header-logo {
    height: 50px;
    margin-right: 15px;
}

.menu-toggle:hover {
    background: rgba(255, 255, 255, 0.2);
}

.menu-container {
    position: relative;
    display: inline-block;
    z-index: 999;
}

.menu-toggle {
    font-size: 26px;
    cursor: pointer;
    color: white;
    padding: 8px 12px;
    transition: background 0.3s;
}

/* Dropdown menu base style */
.dropdown-menu {
    position: absolute;
    right: 0;
    top: 110%;
    background-color: #060079;
    box-shadow: 0 4px 12px rgba(0,0,0,0.2);
    border-radius: 6px;
    padding: 0;
    margin: 0;
    list-style: none;
    min-width: 220px;
    opacity: 0;
    transform: translateY(-10px);
    visibility: hidden;
    pointer-events: none;
    transition: opacity 0.3s ease, transform 0.3s ease, visibility 0.3s;
}

/* Show dropdown */
.dropdown-menu.show {
    opacity: 1;
    transform: translateY(0);
    visibility: visible;
    pointer-events: auto;
}

.dropdown-menu li a {
    display: block;
    padding: 12px 16px;
    text-decoration: none;
    color: white;
    font-weight: 500;
    border-bottom: 1px solid #eee;
    transition: background 0.2s;
}

.dropdown-menu li a:hover {
    background-color: #f5f5f5;
}

.dropdown-menu li:last-child a {
    border-bottom: none;
}

.dropdown-menu li a:hover {
    background-color: #fa0707;
}

.dropdown-menu li:last-child a {
    border-bottom: none;
}

/* Form Elements */
label {
    display: inline-block;
    max-width: 100%;
    margin-bottom: 5px;
    color: var(--text-color-light);
    font-weight: 700;
}

.form-control {
    display: block;
    width: 100%;
    height: 45px;
    padding: 10px 15px;
    font-size: 15px;
    line-height: 1.42857143;
    color: var(--text-color-light);
    background-color: var(--medium-blue);
    background-image: none;
    border: 1px solid var(--light-blue);
    border-radius: 4px;
    box-shadow: inset 0 1px 1px rgba(0, 0, 0, .075);
    transition: border-color .15s ease-in-out, box-shadow .15s ease-in-out;
}

textarea.form-control {
    height: 335px;
    resize: vertical;
}

input[type=search] {
    -webkit-appearance: none;
}

.form-group {
    margin-bottom: 15px;
    width: 100%;
}

.input-group {
    position: relative;
    display: flex;
    flex-wrap: nowrap;
    align-items: center;
    gap: 10px;
    width: 100%;
}

.input-group-addon {
    width: auto;
    flex-shrink: 0;
    padding: 10px 15px;
    font-size: 15px;
    font-weight: 400;
    line-height: 1;
    color: #2c3e50;
    background-color: var(--medium-blue);
    border: 1px solid var(--light-blue);
    border-radius: 4px;
}

.input-group-field {
    display: flex;
    flex-grow: 1;
    min-width: 0;
    vertical-align: middle;
    border-radius: 4px;
}

/* Date সেকশনের দুটি সিলেক্টকে পাশাপাশি রাখতে */
.input-group > select.form-control,
.input-group-field > select.form-control {
    flex-grow: 1;
    min-width: 0;
    width: auto;
}

/* CVC ইনপুটকে উপলব্ধ স্থান ব্যবহার করতে দিন */
.input-group > input.form-control {
    flex-grow: 1;
    min-width: 0;
    width: auto;
}

/* Buttons Styling */
.btn {
    display: inline-block;
    margin-bottom: 0;
    font-weight: 400;
    text-align: center;
    vertical-align: middle;
    touch-action: manipulation;
    cursor: pointer;
    background-image: none;
    border: 1px solid transparent;
    white-space: nowrap;
    padding: 10px 15px;
    font-size: 15px;
    line-height: 1.42857143;
    border-radius: 4px;
    -webkit-user-select: none;
    -moz-user-select: none;
    -ms-user-select: none;
    user-select: none;
}

.btn-primary {
    color: var(--text-color-dark);
    background: linear-gradient(45deg, var(--yellow-btn), var(--orange-btn));
    border-color: #000000;
}

.btn-block {
    display: block;
    width: 100%;
}

.btn-block+.btn-block {
    margin-top: 5px;
}

.btn-link {
    display: inline-block;
    text-decoration: none;
    background: var(--green);
    padding: 5px 10px;
    border-radius: 8px;
    font-size: 16px;
    font-weight: 600;
    color: var(--text-color-light);
    text-align: center;
    cursor: pointer;
    border: 2px solid transparent;
}

.form-group .btn {
    font-weight: 700;
}

.btn-link i {
    margin-right: 5px;
}

/* BIN Section */
.bin-section {
    padding: 5px 2px;
    background-color: var(--dark-blue);
    border-bottom: 1px solid var(--light-blue);
}

.bin-dropdown-container {
    display: flex;
    flex-wrap: wrap;
    gap: 15px;
    margin-top: 3px;
}

.bin-dropdown-card {
    flex: 1;
    min-width: 250px;
    font-family: Arial, sans-serif;
    border-radius: 8px;
    box-shadow: 0 2px 10px var(--shadow);
    overflow: hidden;
    margin-bottom: 1px;
    background-color: var(--medium-blue);
    border: 1px solid var(--light-blue);
}

.bin-dropdown-header {
    background-color: var(--red-bin);
    color: var(--text-color-light);
    padding: 10px 12px;
    display: flex;
    justify-content: space-between;
    align-items: center;
    cursor: pointer;
}

.bin-dropdown-title {
    font-weight: bold;
    font-size: 14px;
}

.bin-dropdown-arrow {
    transition: transform 0.3s ease;
    font-size: 12px;
}

.bin-dropdown-arrow.down {
    transform: rotate(180deg);
}

.bin-dropdown-details {
    background-color: var(--medium-blue);
    padding: 0;
    max-height: 0;
    overflow: hidden;
    transition: max-height 0.3s ease, padding 0.3s ease;
}

.bin-dropdown-details.show {
    padding: 12px 15px;
    max-height: 500px;
}

.bin-dropdown-row {
    display: flex;
    justify-content: space-between;
    margin-bottom: 6px;
    font-size: 13px;
}

.bin-dropdown-label {
    font-weight: bold;
    color: var(--text-muted);
    min-width: 80px;
}

.bin-dropdown-value {
    color: var(--text-color-light);
    text-align: right;
    font-family: monospace;
    cursor: pointer;
}

.bin-live {
    color: var(--green);
    font-weight: bold;
}
.bin-dead {
    color: var(--red-dead);
    font-weight: bold;
}

/* Toast Notification */
.toast-notification {
    position: fixed;
    bottom: 20px;
    left: 50%;
    transform: translateX(-50%) translateY(100px);
    background-color: var(--medium-blue);
    color: var(--text-color-light);
    padding: 12px 24px;
    border-radius: 8px;
    box-shadow: 0 4px 20px rgba(0, 0, 0, 0.25);
    z-index: 9999;
    opacity: 0;
    transition: all 0.4s cubic-bezier(0.68, -0.55, 0.27, 1.55);
    font-family: 'Poppins', sans-serif;
    pointer-events: none;
    max-width: 90%;
    text-align: center;
    border-left: 4px solid var(--green);
}

.toast-notification.show {
    opacity: 1;
    transform: translateX(-50%) translateY(0);
}

/* Copyable Elements */
.copyable,
.bin-dropdown-value,
.bin-dropdown-bin,
.bin-item code,
.bin-detail code {
    cursor: pointer;
    position: relative;
    transition: all 0.2s;
}

/* Clearfix */
.container:after,
.container:before,
.nav:after,
.nav:before,
.row:after,
.row:before {
    content: " ";
    display: table;
}

.container:after,
.nav:after,
.row:after {
    clear: both;
}

/* Footer Styling */
.main-footer {
    text-align: center;
    margin-top: 30px;
    padding: 20px;
    background-color: var(--medium-blue);
    border-top: 2px solid var(--light-blue);
    color: var(--text-color-light);
}

.main-footer p {
    margin: 0;
    font-size: 14px;
}

.main-footer a {
    color: var(--green);
    text-decoration: none;
    font-weight: bold;
}

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

/* Social Links */
.social-links {
    margin-top: 15px;
    display: flex;
    justify-content: center;
    gap: 20px;
}

.social-links a {
    color: var(--text-color-light);
    font-size: 24px;
    transition: color 0.3s ease;
}

.social-links a:hover {
    color: var(--green);
}

/* Colors for live/dead/unknown (Used within BIN section) */
.live {
    color: var(--green);
}
.dead {
    color: var(--red-dead);
}
.unknown {
    color: var(--orange-unknown);
}

/*
    *** এইখানেও পরিবর্তন করা হয়েছে ***
    CVC এবং Quantity ফিল্ডের কলামগুলোকে ছোট স্ক্রিনে পাশাপাশি এবং ঠিকঠাক রাখার জন্য
    flexbox এবং নির্দিষ্ট প্রস্থ ব্যবহার করা হয়েছে।
*/
@media (max-width: 768px) {
    /* Header layout for small screens */
    .navigations {
        flex-direction: row;
        align-items: center;
        height: 60px;
        padding: 0 1rem;
        justify-content: space-between;
    }

    .site-header {
        width: 100%;
        justify-content: flex-start;
        margin-bottom: 10px;
        font-size: 20px;
    }

    .header-logo {
        height: 40px;
        margin-right: 10px;
    }

    .col-md-8,
    .col-md-4,
    .col-md-6 {
        width: auto;
        float: none;
        padding-left: 5px;
        padding-right: 5px;
        box-sizing: border-box;
    }

    .row {
        display: flex;
        flex-wrap: nowrap;
        align-items: flex-start;
        margin-left: -5px;
        margin-right: -5px;
    }

    .form-group .input-group > select.form-control,
    .form-group .input-group .input-group-field > select.form-control {
        flex-grow: 1;
        min-width: 0;
        width: auto;
    }

    .row > .col-md-8 {
        width: 60%;
        flex-basis: 60%;
        max-width: 60%;
    }

    .row > .col-md-4 {
        width: 40%;
        flex-basis: 40%;
        max-width: 40%;
    }

    .col-md-8 .input-group {
        display: flex;
        align-items: center;
        gap: 10px;
        flex-wrap: nowrap;
        width: 100%;
    }

    .col-md-8 .input-group .input-group-addon {
        flex-shrink: 0;
        width: auto;
        padding: 10px 10px;
        display: flex;
        justify-content: center;
        align-items: center;
    }

    .col-md-8 .input-group input.form-control {
        flex-grow: 1;
        width: auto;
    }

    .form-group > input.form-control {
        width: 100%;
        box-sizing: border-box;
    }

    .col-md-4 .form-group > input.form-control {
        width: 100%;
        box-sizing: border-box;
    }
}