:root {
  --fs-base: clamp(0.875rem, 1vw, 1rem); 
  --fs-h1: 2rem;
  --fs-h2: 1.5rem;
  --fs-h3: 1.25rem;
  --fs-h4: 1.125rem;
  --fs-h5: 1rem;
  --fs-h6: 0.875rem;
  --color-text: #333; 
  --color-bg: #fff;   
}


html {
  box-sizing: border-box;
  font-size: 100%; 
  font-weight: normal;
  scroll-behavior: smooth; 
  overflow-y: scroll; 
}

*, *:before, *:after {
  margin: 0;
  padding: 0;
  box-sizing: inherit;
}


body {
  font-size: var(--fs-base);
  color: var(--color-text);
  background-color: var(--color-bg);
  line-height: 1.6;
}


h1 { font-size: var(--fs-h1); }
h2 { font-size: var(--fs-h2); }
h3 { font-size: var(--fs-h3); }
h4 { font-size: var(--fs-h4); }
h5 { font-size: var(--fs-h5); }
h6 { font-size: var(--fs-h6); }
h1, h2, h3, h4, h5, h6 {
  line-height: 1.5;
}


html, body, body div, span, object, iframe, h1, h2, h3, h4, h5, h6, p,
blockquote, pre, abbr, address, cite, code, del, dfn, em, img, ins, kbd,
q, samp, small, strong, sub, sup, var, b, i, dl, dt, dd, ol, ul, li,
fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr,
th, td, article, aside, figure, footer, header, menu, nav, section,
time, mark, audio, video, details, summary {
  border: 0;
  vertical-align: baseline;
  background: transparent;
}



select, input, textarea {
  font-family: inherit;
  font-size: inherit;
}


input, select {
  vertical-align: middle;
}


button, input, select, textarea {
  margin: 0;
}


article, aside, figure, footer, header, nav, section, details, summary {
  display: block;
}


img, object, embed {
  max-width: 100%;
}


ul {
  list-style: none;
}

blockquote, q {
  quotes: none;
}

blockquote:before,
blockquote:after,
q:before,
q:after {
  content: '';
  content: none;
}


p {
  margin-bottom: 1rem;
}


a {
  color: inherit;
  text-decoration: none;
}


a:hover {
  text-decoration: underline;
}


del {
  text-decoration: line-through;
}


abbr[title], dfn[title] {
  border-bottom: 1px dotted #000;
  cursor: help;
}


strong {
  font-weight: bold;
}


small {
  font-size: 85%;
}


sub, sup {
  font-size: 75%;
  line-height: 0;
  position: relative;
}

sup {
  top: -0.5em;
}

sub {
  bottom: -0.25em;
}


pre, code, kbd, samp {
  font-family: monospace, sans-serif;
}


table {
  border-collapse: collapse;
  border-spacing: 0;
  font-size: inherit;
  font: 100%;
}

th {
  font-weight: bold;
  vertical-align: bottom;
}

td {
  font-weight: normal;
  vertical-align: top;
}

td, td img {
  vertical-align: top;
}



pre {
  white-space: pre-wrap;
  word-wrap: break-word;
}


input[type="radio"] {
  vertical-align: text-bottom;
}

input[type="checkbox"] {
  vertical-align: bottom;
}


input[type=button],
input[type=submit],
input[type=file],
button,
label,
.clickable {
  cursor: pointer;
}

button, input[type=button] {
  width: auto;
  overflow: visible;
}




.clearfix:before,
.clearfix:after {
  content: "\0020";
  display: block;
  height: 0;
  overflow: hidden;
}

.clearfix:after {
  clear: both;
}

.clearfix {
  zoom: 1; 
}


fieldset {
  border: none;
  margin: 0;
  padding: 0;
}

legend {
  padding: 0;
}


:focus-visible {
  outline: 2px solid #000;
  outline-offset: 2px;
}

hr {
  display: block;
  height: 1px;
  border: 0;
  border-top: 1px solid #ccc;
  margin: 1em 0;
  padding: 0;
}
/* Nền trắng */
.bg-white {
    background-color: #ffffff;
}

/* Nền xám nhạt để phân biệt section */
.bg-light {
    background-color: #f5f5f5;
}

/* SECTION */
.small-banner-section {
    position: relative;
    padding: 0;
    overflow: hidden;
}

.small-banner-section .container-fluid {
    background: linear-gradient(to right, #2c5f8f 0%, #357abd 50%, #4a90e2 100%);
    position: relative;
}

/* BANNER */
.small-banner {
    position: relative;
    background: transparent;
    z-index: 2;
}

/* TYPOGRAPHY */
.cta-head {
    font-family: 'Poppins', 'Segoe UI', sans-serif;
    font-weight: 700;
    font-style: italic;
    font-size: 36px;
    letter-spacing: 1px;
    color: #ffffff;
    text-shadow: 
        0 2px 4px rgba(0, 0, 0, 0.4),
        0 4px 8px rgba(0, 0, 0, 0.3),
        0 0 20px rgba(255, 255, 255, 0.2);
    line-height: 1.2;
    margin-bottom: 10px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.cta-sub {
    font-family: 'Inter', 'Segoe UI', sans-serif;
    font-size: 17px;
    color: #ffffff;
    opacity: 0.98;
    line-height: 1.6;
    font-weight: 500;
    margin-bottom: 0;
    letter-spacing: 0.3px;
    text-shadow: 0 1px 3px rgba(0, 0, 0, 0.3);
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

/* BUTTON */
.btn-cta-contact {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    background-color: #ffffff;
    color: #357abd;
    padding: 14px 32px;
    border-radius: 50px;
    font-weight: 600;
    font-size: 15px;
    box-shadow: 0 2px 8px rgba(0, 0, 0, 0.12);
    border: none;
    transition: all 0.3s ease;
    text-decoration: none;
    white-space: nowrap;
    letter-spacing: 0.2px;
    -webkit-font-smoothing: antialiased;
    -moz-osx-font-smoothing: grayscale;
}

.btn-cta-contact:hover {
    background-color: #ffffff;
    color: #2c5f8f;
    transform: translateY(-2px);
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.15);
}

.btn-cta-contact:hover i {
    color: #2c5f8f !important;
}

.btn-cta-contact:active {
    transform: translateY(0);
    box-shadow: 0 2px 6px rgba(0, 0, 0, 0.12);
}

.btn-cta-contact i {
    font-size: 15px !important;
    margin-right: 8px !important;
    color: #357abd !important;
    display: inline-block !important;
    vertical-align: middle !important;
    line-height: 1 !important;
    opacity: 1 !important;
    visibility: visible !important;
    font-family: "Font Awesome 6 Free", "Font Awesome 6 Pro" !important;
    font-weight: 900 !important;
    width: auto !important;
    height: auto !important;
}

/* RESPONSIVE */
@media (max-width: 991px) {
    .small-banner {
        padding: 40px 0 !important;
    }
    
    .cta-head {
        font-size: 30px;
        text-align: center;
        letter-spacing: 0.8px;
    }
    
    .cta-sub {
        font-size: 16px;
        text-align: center;
        line-height: 1.6;
    }
    
    .btn-cta-contact {
        padding: 14px 30px;
        font-size: 15px;
    }
}

@media (max-width: 575px) {
    .small-banner {
        padding: 35px 0 !important;
    }
    
    .cta-head {
        font-size: 26px;
        margin-bottom: 12px;
        letter-spacing: 0.6px;
    }
    
    .cta-sub {
        font-size: 15px;
        margin-bottom: 20px;
        line-height: 1.6;
    }
    
    .btn-cta-contact {
        padding: 14px 28px;
        font-size: 15px;
        width: 100%;
        max-width: 100%;
    }
}