/* --- HỆ THỐNG BIẾN MÀU SẮC & CÀI ĐẶT CHUNG --- */
:root {
    --primary-black: #111111;
    --primary-yellow: #FBBC05;
    --primary-orange: #ff6600;
    --text-color: #333333;
    --font-main: 'Segoe UI', Roboto, Helvetica, Arial, sans-serif;
    
    --hero-bg: #000000;
    --text-white: #ffffff;
    --btn-blue: #00d2ff;
    --btn-pink: #ff0051;
}

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
}

body {
    font-family: var(--font-main);
    color: var(--text-color);
    background-color: #f2f2f9;
}

.container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

/* --- HEADER --- */
.header {
    background-color: #ffffff;
    box-shadow: 0 2px 15px rgba(0, 0, 0, 0.05);
    position: sticky;
    top: 0;
    z-index: 1000;
}

.header__container {
    max-width: 1200px;
    margin: 0 auto;
    padding: 15px 20px;
    display: flex;
    justify-content: space-between;
    align-items: center;
}

.logo {
    text-decoration: none;
    font-size: 36px;
    font-weight: 900;
    color: var(--primary-yellow);
    display: flex;
    align-items: flex-start;
    letter-spacing: -1px;
}

.logo__highlight { color: var(--primary-yellow); }
.logo__icon { color: var(--primary-yellow); font-size: 22px; margin-left: 4px; margin-top: 4px; }

.navbar__list {
    list-style: none;
    display: flex;
    gap: 40px;
    align-items: center;
}

.navbar__link {
    text-decoration: none;
    color: var(--primary-black);
    font-size: 16px;
    font-weight: 500;
    transition: color 0.3s ease;
    padding: 10px 0;
    display: flex;
    align-items: center;
    gap: 6px;
}

.navbar__link:hover { color: var(--primary-orange); }
.navbar__arrow { font-size: 12px; transition: transform 0.3s ease; }

.dropdown-parent { position: relative; }
.dropdown {
    position: absolute;
    top: 100%;
    left: -50px;
    background-color: #ffffff;
    box-shadow: 0 10px 30px rgba(0, 0, 0, 0.1);
    min-width: 450px;
    border-radius: 8px;
    padding: 20px;
    display: flex;
    gap: 30px;
    opacity: 0;
    visibility: hidden;
    transform: translateY(15px);
    transition: all 0.3s ease;
}

.dropdown-parent:hover .dropdown { opacity: 1; visibility: visible; transform: translateY(0); }
.dropdown-parent:hover .navbar__arrow { transform: rotate(180deg); }

.dropdown__column { list-style: none; flex: 1; }
.dropdown__heading {
    font-size: 14px; font-weight: 700; color: var(--primary-orange); text-transform: uppercase;
    letter-spacing: 1px; padding-bottom: 10px; margin-bottom: 10px; border-bottom: 2px solid #f4f7f6; pointer-events: none;
}

.dropdown__column a {
    text-decoration: none; color: var(--text-color); padding: 10px 12px; border-radius: 6px;
    transition: all 0.3s ease; font-size: 15px; display: flex; align-items: center; gap: 12px; white-space: nowrap;
}

.dropdown__column a:hover { background-color: #fff5f0; color: var(--primary-orange); transform: translateX(5px); }
.dropdown__icon { font-size: 18px; width: 20px; text-align: center; }
.dropdown__icon--fb { color: #1877F2; }
.dropdown__icon--gg { color: #DB4437; }
.dropdown__icon--tt { color: #000000; text-shadow: 1px 1px 0 #FF00E7, -1px -1px 0 #0078FF; }

.cta-button {
    background-color: var(--primary-orange); color: #ffffff; text-decoration: none;
    padding: 12px 28px; border-radius: 50px; font-weight: 700; font-size: 16px;
    display: flex; align-items: center; gap: 8px; transition: all 0.3s ease; box-shadow: 0 4px 10px rgba(255, 102, 0, 0.3);
}

.cta-button:hover { background-color: #e65c00; transform: translateY(-2px); }

/* --- HERO SECTION --- */
.hero {
    background-color: var(--hero-bg);
    color: var(--text-white);
    position: relative;
    padding: 100px 0 180px 0;
    overflow: hidden;
}

.hero__wrapper {
    display: flex;
    justify-content: space-between;
    align-items: center;
    gap: 40px;
}

.hero__content {
    flex: 1.2;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
}

.hero__title {
    font-size: 48px;
    font-weight: 800;
    margin-bottom: 25px;
    line-height: 1.2;
    text-transform: uppercase;
}

.highlight-brand { color: var(--primary-yellow); }

.hero__actions {
    display: flex;
    gap: 20px;
}

.btn-gradient {
    display: inline-flex;
    align-items: center;
    padding: 15px 40px;
    font-size: 16px;
    font-weight: 700;
    color: #ffffff;
    text-decoration: none;
    border-radius: 50px;
    background: linear-gradient(135deg, var(--btn-blue), var(--btn-pink));
    box-shadow: 0 4px 15px rgba(255, 0, 81, 0.4);
    transition: all 0.3s ease;
}

.btn-gradient:hover { transform: translateY(-3px); box-shadow: 0 6px 20px rgba(255, 0, 81, 0.5); }

.btn-outline {
    display: inline-flex;
    align-items: center;
    padding: 15px 40px;
    font-size: 16px;
    font-weight: 700;
    color: var(--primary-yellow);
    text-decoration: none;
    border-radius: 50px;
    border: 2px solid var(--primary-yellow);
    transition: all 0.3s ease;
}

.btn-outline:hover { background: rgba(251, 188, 5, 0.1); transform: translateY(-3px); }

.hero__image {
    flex: 0.9;
    position: relative;
}

.hero__image-card {
    border: 1px solid #2d2d2e;
    background: rgba(32, 31, 31, 0.5);
    backdrop-filter: blur(20px);
    padding: 10px;
    border-radius: 12px;
    overflow: hidden;
}

.hero__dashboard-img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 6px;
}

.hero__light {
    position: absolute;
    border-radius: 50%;
    filter: blur(80px);
    z-index: 0;
    width: 200px;
    height: 200px;
}
.hero__light--blue { background-color: rgba(0, 210, 255, 0.3); bottom: -50px; left: -50px; }
.hero__light--pink { background-color: rgba(255, 0, 81, 0.3); top: -50px; right: -50px; }

.hero__shape-divider {
    position: absolute;
    bottom: -1px;
    left: 0;
    width: 100%;
    line-height: 0;
}
.hero__shape-divider svg { width: 100%; height: 90px; }

/* --- CORE SERVICES GRID --- */
.core-services {
    padding: 80px 0 40px 0;
    background-color: #f2f2f9;
}
.services-grid-three a {
    text-decoration: none;
}
.section-header h2 {
    font-size: 34px;
    font-weight: 800;
    color: var(--primary-black);
    margin-bottom: 40px;
    display: inline-block;
    border-bottom: 3px solid var(--primary-orange);
    padding-bottom: 5px;
}

.services-grid-three {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    gap: 30px;
}

.service-card {
    background: #ffffff;
    border: 1px solid #e1e1e8;
    padding: 40px 30px;
    border-radius: 12px;
    display: flex;
    flex-direction: column;
    align-items: flex-start;
    transition: all 0.3s ease;
}

.service-card:hover {
    transform: translateY(-5px);
    border-color: var(--primary-orange);
    box-shadow: 0 10px 25px rgba(0,0,0,0.05);
}

.service-card__icon {
    width: 50px;
    height: 50px;
    background: #fff5f0;
    color: var(--primary-orange);
    border-radius: 8px;
    display: flex;
    justify-content: center;
    align-items: center;
    font-size: 22px;
    margin-bottom: 25px;
}

.service-card__title { font-size: 22px; font-weight: 700; color: var(--primary-black); margin-bottom: 15px; }
.service-card__desc { font-size: 15px; line-height: 1.6; color: #555555; }

/* --- SERVICES GRID (COMBOS) --- */
.services-grid {
    background-color: #f2f2f9;
    padding-bottom: 80px;
}

.grid-row {
    display: flex;
    align-items: center;
    gap: 60px;
    margin-bottom: 60px;
    background: #ffffff;
    padding: 40px;
    border-radius: 16px;
    border: 1px solid #e1e1e8;
}

.grid-row--reverse { flex-direction: row-reverse; }
.grid-col { flex: 1; }

.grid-col--image img {
    width: 100%;
    height: auto;
    display: block;
    border-radius: 8px;
}

.grid-col--text { display: flex; flex-direction: column; align-items: flex-start; }
.sub-heading { font-size: 14px; font-weight: 700; color: var(--primary-orange); text-transform: uppercase; margin-bottom: 15px; }
.heading { font-size: 28px; font-weight: 800; color: var(--primary-black); margin-bottom: 25px; }

.feature-list { list-style: none; display: flex; flex-direction: column; gap: 15px; margin-bottom: 30px; }
.feature-list li { display: flex; gap: 12px; align-items: flex-start; }
.feature-icon { color: var(--primary-orange); font-size: 18px; margin-top: 3px; }
.feature-list p { font-size: 15px; line-height: 1.5; color: #444444; }

.combo-footer { width: 100%; display: flex; justify-content: space-between; align-items: center; border-top: 1px solid #eeeeee; padding-top: 20px; }
.combo-offer { font-size: 15px; font-weight: 600; color: var(--primary-orange); font-style: italic; }

.btn-gradient-small {
    background: linear-gradient(90deg, var(--btn-pink), #ff3366);
    color: #ffffff; font-weight: 700; font-size: 14px; padding: 12px 24px; text-decoration: none; border-radius: 6px; transition: all 0.3s;
}
.btn-gradient-small:hover { transform: translateY(-2px); box-shadow: 0 5px 15px rgba(255, 0, 81, 0.3); }

/* --- METRICS BAR --- */
.metrics-bar {
    background: var(--primary-black);
    color: #ffffff;
    padding: 60px 0;
}

.metrics-bar__grid {
    display: grid;
    grid-template-columns: repeat(3, 1fr);
    text-align: center;
}

.metric-item { display: flex; flex-direction: column; gap: 10px; border-right: 1px solid #333333; }
.metric-item:last-child { border-right: none; }
.metric-number { font-size: 48px; font-weight: 900; color: var(--primary-yellow); }
.metric-label { font-size: 13px; font-weight: 700; letter-spacing: 1px; color: #aaaaaa; }

/* --- TESTIMONIALS --- */
.testimonials { padding: 80px 0; background: #ffffff; }
.testimonials-grid { display: grid; grid-template-columns: repeat(3, 1fr); gap: 30px; }

.testimonial-card {
    background: #f8fafc;
    border: 1px solid #e2e8f0;
    padding: 30px;
    border-radius: 12px;
}

.testimonial-card__header { display: flex; gap: 15px; align-items: center; margin-bottom: 15px; }
.testimonial-card__header img { width: 55px; height: 55px; border-radius: 50%; object-fit: cover; border: 2px solid var(--primary-yellow); }
.testimonial-card__header h4 { font-size: 16px; font-weight: 700; color: var(--primary-black); }
.testimonial-card__header p { font-size: 13px; color: #666666; }

.testimonial-card__stars { color: var(--primary-yellow); font-size: 14px; margin-bottom: 15px; }
.testimonial-card__text { font-size: 14.5px; line-height: 1.6; color: #444444; font-style: italic; }

/* --- CONTACT SECTION --- */
.contact-section {
    padding: 80px 0;
    background: linear-gradient(135deg, #fffcf9 0%, #fff0e6 100%);
    border-top: 1px solid #e1e1e8;
}

.contact-wrapper { display: flex; gap: 60px; align-items: center; }
.contact-info { flex: 1; }
.contact-info h2 { font-size: 34px; font-weight: 800; color: var(--primary-black); margin-bottom: 15px; }
.contact-info__desc { font-size: 16px; color: #555555; margin-bottom: 40px; }

.contact-details { display: flex; flex-direction: column; gap: 25px; }
.contact-detail-item { display: flex; gap: 15px; align-items: center; }
.contact-icon { width: 45px; height: 45px; background: #ffffff; border-radius: 50%; display: flex; justify-content: center; align-items: center; color: var(--primary-orange); box-shadow: 0 4px 10px rgba(0,0,0,0.05); font-size: 16px; }
.contact-detail-item h4 { font-size: 14px; text-transform: uppercase; color: #777777; margin-bottom: 2px; }
.contact-detail-item p { font-size: 16px; font-weight: 600; color: var(--primary-black); }

.contact-form-container { flex: 1; background: #ffffff; padding: 40px; border-radius: 12px; box-shadow: 0 10px 30px rgba(0,0,0,0.05); border: 1px solid #e1e1e8; }
.contact-form { display: flex; flex-direction: column; gap: 25px; }

.form-group { position: relative; }
.form-group input, .form-group textarea {
    width: 100%; padding: 10px 0; background: transparent; border: none; border-bottom: 2px solid #e1e1e8;
    font-size: 16px; color: var(--primary-black); transition: all 0.3s; outline: none;
}

.form-group label {
    position: absolute; top: 10px; left: 0; color: #999999; font-size: 16px; pointer-events: none; transition: all 0.3s;
}

.form-group input:focus ~ label, .form-group input:not(:placeholder-shown) ~ label,
.form-group textarea:focus ~ label, .form-group textarea:not(:placeholder-shown) ~ label {
    top: -15px; font-size: 12px; color: var(--primary-orange); font-weight: 700;
}

.form-group input:focus, .form-group textarea:focus { border-bottom-color: var(--primary-orange); }
.form-submit-btn {
    background: var(--primary-black); color: #ffffff; border: none; padding: 15px 35px; font-weight: 700; font-size: 15px;
    text-transform: uppercase; border-radius: 6px; cursor: pointer; transition: all 0.3s; width: fit-content; align-self: flex-end;
}
.form-submit-btn:hover { background: var(--primary-orange); }

/* --- FOOTER --- */
.footer { background-color: #ffffff; padding: 60px 20px; border-top: 1px solid #e1e1e8; }
.footer__container { max-width: 1200px; margin: 0 auto; display: flex; justify-content: space-between; align-items: center; }
.footer__brand-info { display: flex; flex-direction: column; gap: 15px; }
.footer__logo { color: var(--primary-yellow); font-size: 36px; font-weight: 900; letter-spacing: -1px; }
.footer__details p { color: #555555; font-size: 14.5px; margin-bottom: 6px; }
.footer__links { list-style: none; display: flex; gap: 30px; }
.footer__links a { text-decoration: none; color: var(--primary-black); font-size: 15px; font-weight: 500; transition: color 0.3s; }
.footer__links a:hover { color: var(--primary-orange); }

/* --- MÀN HÌNH DI ĐỘNG RESPONSIVE --- */
@media (max-width: 900px) {
    .navbar { display: none; }
    .hero__wrapper, .grid-row, .grid-row--reverse, .contact-wrapper { flex-direction: column; gap: 40px; }
    .services-grid-three, .testimonials-grid, .metrics-bar__grid { grid-template-columns: 1fr; gap: 20px; }
    .metric-item { border-right: none; border-bottom: 1px solid #333333; padding-bottom: 15px; }
    .metric-item:last-child { border-bottom: none; }
    .hero__content { align-items: center; text-align: center; }
    .hero__title { font-size: 32px; }
    .footer__container { flex-direction: column; align-items: flex-start; gap: 30px; }
    .footer__links { flex-direction: column; gap: 12px; }
}