/* ==========================================================================
   Tâm An Dental - Youthful & Vibrant Theme
   ========================================================================== */
   @import url('https://fonts.googleapis.com/css2?family=Be+Vietnam+Pro:wght@400;600;700;800;900&display=swap');

   :root {
       --primary-blue: #0056D2; 
       --cyan: #00A5FF; 
       --cyan-light: #EBF7FF;
       --yellow: #FFDB00;
       --yellow-light: #FFF8CC;
       --red: #FF3B3B;
       --red-light: #FFE5E5;
       --green: #00B96B;
       --white: #FFFFFF;
       --gray: #6C757D;
       --gray-light: #F8F9FA;
       --dark: #121F33;
   }
   
   * { box-sizing: border-box; margin: 0; padding: 0; font-family: 'Be Vietnam Pro', sans-serif;}
   body { color: var(--dark); line-height: 1.6; background-color: var(--white); overflow-x: hidden; }
   a { text-decoration: none; }
   ul { list-style: none; }
   
   /* UTILS */
   .text-primary { color: var(--primary-blue); }
   .text-cyan { color: var(--cyan); }
   .text-yellow { color: var(--yellow); }
   .text-red { color: var(--red); }
   .text-dark { color: var(--dark); }
   .text-white { color: var(--white); }
   .text-gray { color: var(--gray); text-align: left;}
   .text-muted { color: #8F9CAE; }
   .text-center { text-align: center; }
   .text-left { text-align: left; }
   .fw-bold { font-weight: 800; }
   .fw-medium { font-weight: 600; }
   
   .bg-cyan { background-color: var(--cyan); }
   .bg-light-cyan { background-color: var(--cyan-light); }
   .bg-yellow { background-color: var(--yellow); }
   .bg-light-yellow { background-color: var(--yellow-light); }
   .bg-red { background-color: var(--red); }
   .bg-light-red { background-color: var(--red-light); }
   .bg-white { background-color: var(--white); }
   .bg-dark { background-color: var(--dark); }
   .bg-transparent { background-color: transparent !important;}
   .bg-glow { box-shadow: 0 0 15px rgba(0, 165, 255, 0.5); }
   
   /* Layout Specific */
   .container { max-width: 1100px; margin: 0 auto; padding: 0 20px; position:relative; z-index: 2;}
   .flex-row { display: flex; flex-wrap: wrap; gap: 30px; }
   .half-col { flex: 1; min-width: 320px; }
   .d-flex-center { display: flex; align-items: center; justify-content: center; }
   .d-flex { display: flex; }
   .align-items-center { align-items: center; }
   .justify-content-center { justify-content: center; }
   
   .section-padding { padding: 90px 0; }
   .p-0 { padding: 0 !important; } .p-2 { padding: 0.5rem; } .p-3 { padding: 1rem; } .p-4 { padding: 2rem; } .p-5 { padding: 3rem; }
   .pt-3 { padding-top: 1rem; } .pt-4 { padding-top: 1.5rem; } .pt-5 { padding-top: 4rem; } 
   .pb-2 { padding-bottom: 0.5rem; } .pb-5 { padding-bottom: 4rem; }
   .pe-4 { padding-right: 1.5rem; } .pr-5 { padding-right: 3rem; } .pl-lg-5 { padding-left: 3rem; }
   .padding-right-lg { padding-right: 2.5rem; } .padding-left-lg { padding-left: 2.5rem; }
   .px-5 { padding-left: 3rem; padding-right: 3rem; } .py-3 { padding-top: 1rem; padding-bottom: 1rem; }
   
   .mt-1 { margin-top: 0.5rem;} .mt-2 { margin-top: 0.8rem;} .mt-3 { margin-top: 1rem; } .mt-4 { margin-top: 2rem; } .mt-5 { margin-top: 4rem; }
   .mb-0 { margin-bottom: 0 !important; } .mb-1 { margin-bottom: 0.3rem; } .mb-2 { margin-bottom: 0.5rem; } .mb-3 { margin-bottom: 1rem; } .mb-4 { margin-bottom: 2rem; } .mb-5 { margin-bottom: 4rem; }
   
   .ms-3 { margin-left: 1rem; }
   .ms-4-margin { margin-left: 1rem; }
   .me-4 { margin-right: 1.5rem; } .gap-2 { gap: 0.5rem;}
   
   .img-fluid { max-width: 100%; height: auto; display: block;}
   .border-white { border: 6px solid var(--white); }
   .border-cyan { border: 4px solid var(--cyan); }
   .border-yellow { border: 4px solid var(--yellow); }
   .border-left-white { border-left: 6px solid var(--white) !important; }
   .border-light-cyan { border: 8px solid var(--cyan-light); }
   .border-secondary { border-color: #334155 !important; }
   .border-top { border-top: 1px solid #ddd; }
   .border-0 { border: none !important; }
   
   .rounded { border-radius: 16px; }
   .rounded-lg { border-radius: 24px; }
   .rounded-pill { border-radius: 50px; }
   .rounded-circle { border-radius: 50%; }
   .shadow-soft { box-shadow: 0 10px 40px rgba(0,0,0,0.06); }
   .shadow-md { box-shadow: 0 15px 35px rgba(0,0,0,0.1); }
   .shadow-lg { box-shadow: 0 15px 40px rgba(0, 0, 0, 0.15); }
   .shadow-xl { box-shadow: 0 25px 60px rgba(0, 0, 0, 0.3); }
   .drop-shadow-lg { filter: drop-shadow(0 20px 30px rgba(0,0,0,0.15)); }
   .drop-shadow-xl { filter: drop-shadow(0 20px 40px rgba(0,0,0,0.3)); }
   .overflow-hidden { overflow: hidden; }
   .position-relative, .relative-z { position: relative; z-index: 2; }
   .opacity-50 { opacity: 0.5; }
   .opacity-75 { opacity: 0.75; }
   
   /* TYPOGRAPHY */
   .title-youthful { font-size: 4rem; color: var(--white); font-weight: 900; letter-spacing: 1px; -webkit-text-stroke: 2px var(--primary-blue); text-shadow: 3px 6px 0px rgba(0, 86, 210, 0.2); line-height: 1.1; }
   .title-sub-youthful { font-size: 3.5rem; color: var(--yellow); font-weight: 900; -webkit-text-stroke: 1.5px var(--primary-blue); text-shadow: 2px 4px 0px var(--primary-blue); line-height: 1.1; }
   .title-section { font-size: 2.2rem; font-weight: 900; text-transform: uppercase; color: var(--dark); line-height:1.2;}
   .sale-ribbon { display:inline-block; background: var(--cyan); color: var(--white); padding: 5px 20px; font-weight: 900; font-size: 1.5rem; transform: skew(-10deg); box-shadow: 3px 3px 0 var(--dark);}
   
   .fs-2 { font-size: 2.5rem !important;}
   .fs-4 { font-size: 1.5rem !important;}
   .fs-5 { font-size: 1.1rem !important;}
   .display-3 { font-size: 4rem !important;}
   .float-start { float: left;}
   .small { font-size: 0.9rem; }
   .lh-lg { line-height: 1.8; }
   
   /* BUTTONS & BADGES */
   .btn { padding: 16px 30px; font-size: 1.2rem; font-weight: 800; border: none; cursor: pointer; transition: all 0.3s; text-transform: uppercase; border-radius: 12px; display:inline-block;}
   .btn-yellow { background: var(--yellow); color: var(--primary-blue); box-shadow: 0 6px 0px #CCA100;}
   .btn-yellow:active { transform: translateY(6px); box-shadow: 0 0px 0px #CCA100;}
   
   .btn-cyan { background: var(--cyan); color: var(--white); box-shadow: 0 6px 0px #0081C9;}
   .btn-cyan:active { transform: translateY(6px); box-shadow: 0 0px 0px #0081C9;}
   
   .btn-red { background: var(--red); color: var(--white); box-shadow: 0 6px 0px #C91A1A; border-radius: 50px;}
   .btn-red:active { transform: translateY(6px); box-shadow: 0 0px 0px #C91A1A;}
   
   .btn-outline-cyan { padding: 10px 20px; border: 2px solid var(--cyan); color: var(--cyan); font-weight: 700; background: transparent; font-size: 1rem;}
   .w-100 { width: 100%; }
   
   .badge-tag { display: inline-block; padding: 8px 18px; font-weight: 800; border-radius: 30px; font-size: 0.9rem; margin-bottom: 10px; letter-spacing: 1px;}
   .tag-red { background: var(--red-light); color: var(--red); }
   .tag-cyan { background: var(--cyan-light); color: var(--cyan); }
   
   /* NAVBAR */
   .navbar { position: fixed; top: 0; left: 0; right: 0; background: rgba(255, 255, 255, 0.95); backdrop-filter: blur(10px); z-index: 100; box-shadow: 0 2px 15px rgba(0,0,0,0.05); padding: 15px 0; }
   .nav-container { display: flex; justify-content: space-between; align-items: center; }
   .logo { font-size: 1.5rem; font-weight: 900; color: var(--dark); display: flex; align-items: center; gap: 8px;}
   
   /* BACKGROUNDS & SLANTS & BLOBS */
   .hero-section { padding: 140px 0 80px 0; background: linear-gradient(110deg, var(--white) 0%, var(--white) 50%, var(--primary-blue) 50.1%, var(--cyan) 100%); overflow: hidden; position: relative; }
   .slanted-bg-rev { background: linear-gradient(-5deg, var(--cyan-light) 0%, var(--white) 50%, var(--white) 100%); }
   .blob-bg { position: absolute; width: 300px; height: 300px; border-radius: 50%; filter: blur(50px); top: 50%; left: 50%; transform: translate(-50%, -50%); z-index: 1;}
   
   /* CARDS & GRIDS */
   .grid-3 { display: grid; grid-template-columns: repeat(3, 1fr); gap: 15px; }
   .grid-card-5 { display: flex; flex-wrap: wrap; justify-content: center; gap: 20px;}
   
   .mini-card { border-radius: 16px; overflow: hidden; text-align: center; border-width: 3px; border-style: solid; }
   .mini-card i { height: 50px; display: flex; align-items: center; justify-content: center;}
   .mini-card-lbl { padding: 8px; font-weight: 800; font-size: 0.8rem; }
   
   .benefit-card { flex: 1; min-width: 200px; padding: 30px 20px; border-radius: 20px; border-top: 5px solid var(--cyan); transition: 0.3s; }
   .benefit-card:hover { transform: translateY(-10px); box-shadow: var(--shadow-xl);}
   .icon-circle { width: 60px; height: 60px; border-radius: 50%; display: flex; align-items: center; justify-content: center; font-size: 1.5rem; margin: 0 auto; box-shadow: 0 5px 15px rgba(0,0,0,0.1);}
   
   /* LISTS */
   .warning-list, .check-list { display: flex; flex-direction: column; gap: 15px; }
   .warning-item, .check-list li { font-size: 1.15rem; background: var(--white); padding: 15px 20px; border-radius: 12px; box-shadow: var(--shadow-md); display: flex; align-items: flex-start; gap: 15px; color: var(--dark);}
   .warning-item i, .check-list li i { font-size: 1.4rem; margin-top: 3px;}
   .check-list-sm { gap: 10px;}
   .check-list-sm li { padding: 10px 15px; font-size: 1rem; box-shadow: none; border: 1px solid #eee; }
   
   /* COMPARE BOX */
   .compare-wrapper { display: flex; border-radius: 24px; overflow: hidden; }
   .compare-img { flex: 1; position: relative; }
   .compare-img img { width: 100%; display: block; }
   .compare-label {
       position: absolute; bottom: 20px; left: 50%; transform: translateX(-50%);
       padding: 10px 20px; font-weight: 800; border-radius: 30px; color: var(--white);
       font-size: 1rem; white-space: nowrap; box-shadow: var(--shadow-md);
       border: 3px solid var(--white);
   }
   
   /* FORM */
   .custom-input { width: 100%; padding: 16px 20px; border-radius: 10px; border: 2px solid #ddd; font-size: 1.1rem; background: var(--gray-light); transition: all 0.3s; }
   .custom-input:focus { outline: none; border-color: var(--cyan); background: var(--white); box-shadow: 0 0 0 4px var(--cyan-light); }
   
   /* BADGE */
   .floating-badge { position: absolute; top: -30px; right: 20px; background: var(--white); padding: 25px 20px; border-radius: 20px; text-align: center; border: 5px solid var(--cyan); box-shadow: var(--shadow-xl); font-weight: 900; z-index: 10; }
   .floating-badge .text-big { font-size: 2rem; color: var(--cyan); }
   
   /* ==========================================================================
      ANIMATIONS (STATIC & WOW EFFECTS)
      ========================================================================== */
   
   /* Twinkling Stars Background */
   .stars-bg {
       position: absolute; top: 0; left: 0; right: 0; bottom: 0;
       background-image: 
           radial-gradient(2px 2px at 20px 30px, #ffffff, rgba(0,0,0,0)),
           radial-gradient(2px 2px at 40px 70px, #ffffff, rgba(0,0,0,0)),
           radial-gradient(2px 2px at 50px 160px, #ffffff, rgba(0,0,0,0)),
           radial-gradient(3px 3px at 90px 40px, #ffffff, rgba(0,0,0,0)),
           radial-gradient(2px 2px at 130px 80px, #ffffff, rgba(0,0,0,0)),
           radial-gradient(3px 3px at 160px 120px, #ffffff, rgba(0,0,0,0));
       background-repeat: repeat;
       background-size: 200px 200px;
       animation: twinkle 4s infinite linear;
       opacity: 0.8;
       z-index: 1;
   }
   @keyframes twinkle {
       0% { opacity: 0.5; transform: scale(1); }
       50% { opacity: 1; transform: scale(1.05); }
       100% { opacity: 0.5; transform: scale(1); }
   }
   
   /* 3D Rotating Implant */
   .implant-showcase {
       position: relative;
       width: 300px; height: 300px;
       display: flex; align-items: center; justify-content: center;
   }
   .glow-orb {
       position: absolute; width: 150px; height: 150px; border-radius: 50%;
       filter: blur(40px); opacity: 0.5; z-index: -1; animation: popHeart 2s infinite;
   }
   .implant-anim {
       animation: spin3D 8s infinite linear;
       transform-style: preserve-3d;
   }
   @keyframes spin3D {
       0% { transform: rotateY(0deg) translateY(0); filter: drop-shadow(0 20px 40px rgba(0,0,0,0.3)); }
       25% { transform: rotateY(20deg) translateY(-10px); filter: drop-shadow(20px 30px 40px rgba(0,0,0,0.2));}
       50% { transform: rotateY(0deg) translateY(0); filter: drop-shadow(0 20px 40px rgba(0,0,0,0.3));}
       75% { transform: rotateY(-20deg) translateY(10px); filter: drop-shadow(-20px 10px 40px rgba(0,0,0,0.2));}
       100% { transform: rotateY(0deg) translateY(0); filter: drop-shadow(0 20px 40px rgba(0,0,0,0.3));}
   }
   
   /* UI Pulses */
   @keyframes popHeart { 0%, 100% {transform: scale(1);} 50% {transform: scale(1.05);} }
   .heartbeat { animation: popHeart 1.5s infinite; }
   
   @keyframes pulseColor { 0% {box-shadow: 0 0 0 0 rgba(255, 59, 59, 0.7);} 70% {box-shadow: 0 0 0 15px rgba(255, 59, 59, 0);} 100% {box-shadow: 0 0 0 0 transparent;} }
   .pulse-red { animation: pulseColor 2s infinite; }
   
   .floating-anim { animation: floaty 4s ease-in-out infinite; }
   @keyframes floaty { 0% {transform: translateY(0);} 50% {transform: translateY(-20px);} 100% {transform: translateY(0);} }
   
   /* RESPONSIVE */
   @media (max-width: 900px) {
       body { font-size: 14px; }
       .container { width: 100%; max-width: 100%; padding: 0 15px; overflow-x: hidden; }
       .half-col { min-width: 100%; width: 100%; padding-right: 0 !important; padding-left: 0 !important; margin-bottom: 20px;}
       .pr-5, .pl-lg-5, .padding-right-lg, .padding-left-lg { padding-right: 0 !important; padding-left: 0 !important; }
       
       .hero-section { background: var(--cyan); padding: 120px 0 60px 0; }
       .hero-content { text-align: center !important; }
       .title-youthful { font-size: 2.5rem; -webkit-text-stroke: 1px var(--primary-blue); }
       .title-sub-youthful { font-size: 2rem; -webkit-text-stroke: 1px var(--primary-blue); }
       .hero-cta-wrapper { justify-content: center; }
       
       .compare-wrapper { flex-direction: column; }
       .compare-img { border-right: none; border-bottom: 0; }
       .border-left-white { border-left: none !important; border-top: 6px solid var(--white);}
       
       .navbar { position: relative; } /* Mobile navbar không nên sticky nếu lấn diện tích */
       .logo-wrapper img { height: 40px !important; }
       .section-padding { padding: 50px 0; }
       .display-6 { font-size: 1.5rem !important; }
       .fs-2 { font-size: 1.8rem !important; }
       .award-card { min-width: 100% !important; margin-bottom: 15px;}
       .flex-row { gap: 15px; }
   }