:root {
    --primary-color: #000957;
    --secondary-color: #FFF7D1;
    --third-color: #00FFDE;
    --text-color: #A27B5C;
    --fourth-color: #AED2FF;
    
    /* Common spacing */
    --spacing-xs: 0.5rem;
    --spacing-sm: 1rem;
    --spacing-md: 1.5rem;
    --spacing-lg: 2rem;
    --spacing-xl: 3rem;
    
    /* Common borders */
    --border-thin: 2px solid var(--text-color);
    --border-medium: 4px solid var(--text-color);
    --border-thick: 5px solid var(--text-color);
    
    /* Common border-radius */
    --radius-sm: 0.5rem;
    --radius-md: 1rem;
    --radius-lg: 2rem;
    
    /* Common transitions */
    --transition-fast: all 0.2s ease;
    --transition-normal: all 0.3s ease;
}

/* ===== GLOBAL STYLES ===== */
h1, h2, h3, h4, h5, h6 {
    color: var(--third-color);
}

li {
    list-style: none;
}

a {
    text-decoration: none;
    color: var(--third-color);
}

p {
    color: var(--text-color);
}

body {
    background-color: var(--third-color);
    color: var(--text-color);
    margin: 0 auto;
    padding: 0;
    font-family: 'Roboto', sans-serif;
    font-size: 16px;
    line-height: 1.5;
    font-weight: 400;
    text-rendering: optimizeLegibility;
    max-width: 800px;
}

/* ===== LAYOUT COMPONENTS ===== */
header, footer {
    border: var(--border-thick);
    background-color: black;
    margin: 20px auto;
}

.container {
    border: var(--border-thick);
    background-color: black;
}

/* ===== HEADER STYLES ===== */
.header__container {
    padding: var(--spacing-lg);
    margin: 0 var(--spacing-lg);
}

/* ===== HERO & ABOUT SECTIONS ===== */
.hero__container, .hero__title, .hero__description,
.about__container, .projects__container, .contact__container {
    margin: 20px var(--spacing-lg);
}

.hero__container, .hero__title, .hero__description {
    text-align: center;
}

/* ===== TIME & LOCATION CONTAINER ===== */
.hero__time-location {
    justify-content: space-around;
    align-items: center;
    margin-bottom: var(--spacing-md);
    flex-wrap: wrap;
    gap: var(--spacing-md);
}

/* ===== TIME & LOCATION ITEMS ===== */
.hero__time,
.hero__location {
    display: flex;
    align-items: center;
    flex-direction: row;
    gap: var(--spacing-sm);
    border-radius: var(--radius-md);
    min-width: 60px;
    justify-content: center;
    transition: var(--transition-normal);
}

/* ===== ICONS ===== */
.hero__time i,
.hero__location i {
    color: var(--third-color);
    font-size: 1.3rem;
    min-width: 20px;
}

/* ===== TEXT CONTENT ===== */
.hero__time span,
.hero__location span {
    color: var(--text-color);
    font-size: 0.9rem;
    font-weight: 500;
    line-height: 1.4;
}

/* ===== SPECIFIC ELEMENTS ===== */
#current-time {
    font-size: 1.2rem !important;
    font-weight: 700 !important;
    color: var(--third-color) !important;
    font-family: 'Jersey 10', monospace;
    letter-spacing: 1px;
}

#current-date {
    color: var(--fourth-color) !important;
    font-weight: 600 !important;
    text-transform: capitalize;
}

#current-location {
    color: var(--secondary-color) !important;
    font-weight: 600 !important;
}

#timezone {
    color: var(--text-color) !important;
    font-size: 0.8rem !important;
    opacity: 0.8;
    font-style: italic;
}

/* ===== CONTACT SECTION ===== */
.contact__list {
    display: flex;
    justify-content: space-evenly;
    align-items: center;
    padding: 0;
}

.footer__container {
    margin: 0 var(--spacing-lg);
}

.footer__text {
    text-align: center;
    color: var(--third-color);
}

/* ===== RESPONSIVE DESIGN ===== */
@media (max-width: 1024px) {
    .hero__time-location {
        gap: var(--spacing-sm);
    }
    
    .hero__time,
    .hero__location {
        min-width: 200px;
        padding: var(--spacing-sm);
    }
}

@media (max-width: 768px) {
    body {
        max-width: 100%;
        margin: 0 30px
    }
   
    .hero__info {
        margin: var(--spacing-md) var(--spacing-sm);
        padding: var(--spacing-sm);
    }
    
    .hero__time-location {
        flex-direction: column;
        gap: var(--spacing-sm);
        width: 85%;
        align-items: center;
    }
    
    .hero__time,
    .hero__location {
        min-width: 100%;
        justify-content: flex-start;
        padding: var(--spacing-md);
    }
    
    /* Cải thiện layout cho mobile */
    .hero__time span,
    .hero__location span {
        font-size: 0.95rem;
    }
    
    #current-time {
        font-size: 1.1rem !important;
    }
}

@media (max-width: 480px) {
    .hero__info {
        margin: var(--spacing-sm);
        padding: var(--spacing-sm);
        border-radius: var(--radius-sm);
    }
    
    .hero__time,
    .hero__location {
        padding: var(--spacing-sm);
        border-radius: var(--radius-sm);
    }
    
    .hero__time i,
    .hero__location i {
        font-size: 1.1rem;
        min-width: 16px;
    }
    
    .hero__time span,
    .hero__location span {
        font-size: 0.85rem;
    }
    
    #current-time {
        font-size: 1rem !important;
        letter-spacing: 0.5px;
    }
    
    #current-date {
        font-size: 0.85rem !important;
    }
    
    #timezone {
        font-size: 0.75rem !important;
    }
}

@media (max-width: 360px) {
    .hero__info {
        margin: var(--spacing-xs);
        padding: var(--spacing-xs);
    }
    
    .hero__time,
    .hero__location {
        padding: var(--spacing-xs);
        gap: var(--spacing-xs);
    }
    
    .hero__time span,
    .hero__location span {
        font-size: 0.8rem;
    }
    
    #current-time {
        font-size: 0.95rem !important;
    }
}