:root {
    /* Colors */
    --color-primary: #192a56;
    --color-primary-light: #273c75;
    --color-accent: #ff7f50;
    --color-accent-hover: #ff6b35;
    --color-blue-btn: #40739e;
    --color-text-main: #2f3542;
    --color-text-light: #747d8c;
    --color-white: #ffffff;
    --color-bg-light: #f1f2f6;
    --color-border: #dfe4ea;
    
    /* Info Box Colors */
    --color-info-bg: #e1f5fe;
    --color-info-border: #0288d1;
    --color-success-bg: #e8f5e9;
    --color-success-border: #388e3c;
    --color-warning-bg: #fff8e1;
    --color-warning-border: #ffa000;
    --color-danger-bg: #ffebee;
    --color-danger-border: #d32f2f;

    /* Typography */
    --font-main: 'Inter', system-ui, -apple-system, sans-serif;
    --fz-base: 1rem;
    --fz-lg: 1.125rem;
    --fz-xl: clamp(1.5rem, 4vw, 2.5rem);
    --fz-xxl: clamp(2rem, 5vw, 3rem);

    /* Spacing & Layout */
    --spacing-xs: 0.3125rem; /* 5px */
    --spacing-sm: 0.625rem; /* 10px */
    --spacing-md: 1.25rem; /* 20px */
    --spacing-lg: 1.875rem; /* 30px */
    --spacing-xl: 2.5rem; /* 40px */
    --container-width: 75rem; /* 1200px */
    --radius-sm: 0.3125rem;
    --radius-md: 0.625rem;
    --radius-lg: 1.25rem;

    /* Shadows */
    --shadow-sm: 0 2px 4px rgba(0,0,0,0.05);
    --shadow-md: 0 4px 6px rgba(0,0,0,0.1);
    --shadow-lg: 0 10px 15px rgba(0,0,0,0.1);
    --shadow-hover: 0 15px 30px rgba(0,0,0,0.15);
}

/* --- Reset & Base Styles --- */
*, *::before, *::after {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

html {
    scroll-behavior: smooth;
    font-size: 16px;
}

body {
    font-family: var(--font-main);
    color: var(--color-text-main);
    background-color: var(--color-bg-light);
    line-height: 1.6;
    -webkit-font-smoothing: antialiased;
}

img, svg {
    display: block;
    max-width: 100%;
    height: auto;
}

a {
    text-decoration: none;
    color: inherit;
    transition: all 0.3s ease;
}

ul {
    list-style: none;
}

/* --- Layout Wrappers --- */
.wrap, .wrap_2 {
    width: 100%;
    max-width: var(--container-width);
    margin: 0 auto;
    padding-left: var(--spacing-md);
    padding-right: var(--spacing-md);
}

.wrap_2 {
    max-width: 60rem; /* Narrower for reading content */
    background: var(--color-white);
    border-radius: var(--radius-lg);
    box-shadow: var(--shadow-sm);
    margin-top: -2rem; /* Overlap header slightly */
    position: relative;
    z-index: 10;
}

/* --- Utility Classes (Mapped from HTML) --- */
.flex { display: flex; }
.aic { align-items: center; }
.jcc { justify-content: center; }
.fxs { flex-shrink: 0; }
.fxg { flex-grow: 1; }

.block { display: block; }
.hide { display: none; }

/* Spacing Utilities */
.mr-20 { margin-right: var(--spacing-md); }
.ml-10 { margin-left: var(--spacing-sm); }
.mb-30 { margin-bottom: var(--spacing-lg); }
.mt-40 { margin-top: var(--spacing-xl); }
.pt-10 { padding-top: var(--spacing-sm); }
.pb-10 { padding-bottom: var(--spacing-sm); }
.pt-20 { padding-top: var(--spacing-md); }
.pb-20 { padding-bottom: var(--spacing-md); }
.pl-20 { padding-left: var(--spacing-md); }
.pr-20 { padding-right: var(--spacing-md); }

/* Typography Utilities */
.fz18 { font-size: 1.125rem; }
.fw500 { font-weight: 500; }
.text-fff { color: var(--color-white); }
.text-white { color: var(--color-white); }
.no-under { text-decoration: none; }
.ttu { text-transform: uppercase; }
.center { text-align: center; }
.lh140 { line-height: 1.4; }

/* Visual Utilities */
.bg-blue-049 { background-color: rgba(255, 255, 255, 0.1); backdrop-filter: blur(5px); }
.bg-orang { background: linear-gradient(135deg, var(--color-accent) 0%, var(--color-accent-hover) 100%); }
.bg-blue { background: linear-gradient(135deg, var(--color-primary-light) 0%, var(--color-primary) 100%); }
.round-20 { border-radius: var(--radius-lg); }
.h-42 { height: 2.625rem; }

/* --- Header Styles --- */
.header-content {
    background: var(--color-primary);
    color: var(--color-white);
    padding: var(--spacing-md) 0 var(--spacing-xl) 0; /* Extra bottom padding for overlap */
    position: relative;
    box-shadow: var(--shadow-md);
}

.logo img {
    height: 3rem;
    transition: transform 0.3s ease;
}

.logo:hover img {
    transform: scale(1.05);
}

/* Navigation Menu */
.menu-main ul {
    padding: 0.5rem 1rem;
    flex-wrap: wrap;
    gap: 1rem;
}

.menu-main a {
    display: flex;
    align-items: center;
    padding: 0.5rem 1rem;
    border-radius: var(--radius-sm);
    position: relative;
    overflow: hidden;
}

.menu-main a:hover {
    background-color: rgba(255, 255, 255, 0.15);
}

.menu-main a svg {
    height: 1.25rem;
    width: auto;
    fill: currentColor;
    margin-right: 0.5rem;
    transition: transform 0.3s ease;
}

.menu-main a:hover svg {
    transform: translateY(-2px);
}

/* Header Buttons (Login/Reg) */
.head-top-left a {
    transition: all 0.3s cubic-bezier(0.4, 0, 0.2, 1);
    box-shadow: 0 4px 10px rgba(0,0,0,0.2);
    font-size: 0.875rem;
    letter-spacing: 0.05em;
}

.head-top-left a:hover {
    transform: translateY(-2px);
    box-shadow: 0 6px 15px rgba(0,0,0,0.3);
    filter: brightness(1.1);
}

/* Hamburger Menu (Hidden by default on desktop) */
.open-menu {
    cursor: pointer;
    padding: 0.5rem;
}

/* --- Main Content & Article --- */
.main {
    padding-bottom: 4rem;
}

article h1 {
    font-size: var(--fz-xxl);
    font-weight: 800;
    color: var(--color-primary);
    margin-bottom: 2rem;
    letter-spacing: -0.02em;
    position: relative;
    padding-bottom: 1rem;
}

article h1::after {
    content: '';
    position: absolute;
    bottom: 0;
    left: 50%;
    transform: translateX(-50%);
    width: 60px;
    height: 4px;
    background: var(--color-accent);
    border-radius: 2px;
}

article h2 {
    font-size: var(--fz-xl);
    color: var(--color-primary);
    margin-top: 3rem;
    margin-bottom: 1.5rem;
    font-weight: 700;
}

article p {
    margin-bottom: 1.5rem;
    color: var(--color-text-main);
    font-size: 1.05rem;
}

/* Content Buttons */
.btn {
    display: inline-flex;
    align-items: center;
    justify-content: center;
    padding: 1rem 2.5rem;
    font-size: 1.125rem;
    font-weight: 700;
    border-radius: 50px;
    box-shadow: 0 10px 20px rgba(255, 107, 0, 0.3);
    transition: all 0.3s cubic-bezier(0.175, 0.885, 0.32, 1.275);
    border: 2px solid transparent;
}

.btn:hover {
    transform: translateY(-3px) scale(1.02);
    box-shadow: 0 15px 25px rgba(255, 107, 0, 0.4);
    filter: brightness(1.1);
}

.btn:active {
    transform: translateY(-1px);
}

/* Images in Content */
figure.image {
    margin: 2rem 0;
    text-align: center;
}

figure.image img {
    border-radius: var(--radius-md);
    box-shadow: var(--shadow-lg);
    transition: transform 0.4s ease, box-shadow 0.4s ease;
    margin: 0 auto;
}

figure.image img:hover {
    transform: scale(1.02);
    box-shadow: var(--shadow-hover);
}

/* --- Info Boxes --- */
.info-box {
    padding: 1.5rem;
    border-radius: var(--radius-sm);
    margin: 2rem 0;
    border-left: 5px solid transparent;
    font-size: 0.95rem;
    position: relative;
    overflow: hidden;
}

.info-box::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    opacity: 0.5;
    z-index: 0;
    pointer-events: none;
}

.info-box-content {
    position: relative;
    z-index: 1;
}

.info-box p:last-child {
    margin-bottom: 0;
}

.info-box-info {
    background-color: var(--color-info-bg);
    border-left-color: var(--color-info-border);
    color: #01579b;
}

.info-box-success {
    background-color: var(--color-success-bg);
    border-left-color: var(--color-success-border);
    color: #1b5e20;
}

.info-box-warning {
    background-color: var(--color-warning-bg);
    border-left-color: var(--color-warning-border);
    color: #e65100;
}

.info-box-danger {
    background-color: var(--color-danger-bg);
    border-left-color: var(--color-danger-border);
    color: #b71c1c;
}

/* --- Footer --- */
footer {
    background-color: var(--color-primary);
    padding: 3rem 0;
    margin-top: auto;
}

.copy {
    text-align: center;
    font-size: 0.875rem;
    color: var(--color-text-light);
    border-top: 1px solid var(--color-border);
    padding-top: 2rem;
}

/* --- Responsive Media Queries --- */

/* Tablet & Mobile Menu Toggle Logic */
@media (max-width: 992px) {
    .hide_992 { display: none !important; }
    .show_992 { display: block !important; }
    
    .menu-main {
        display: none; /* Hide main nav items on tablet/mobile by default */
    }
    
    .head {
        justify-content: space-between;
    }

    .wrap_2 {
        margin-top: -1rem;
        border-radius: var(--radius-lg) var(--radius-lg) 0 0;
    }

    article h1 {
        font-size: 2rem;
    }
}

/* Mobile Specific */
@media (max-width: 768px) {
    .hide_550 { display: none !important; }
    
    .mr-20 { margin-right: 0.5rem; }
    
    .logo img {
        height: 2.5rem;
    }

    .header-content {
        padding-bottom: var(--spacing-lg);
    }

    .wrap, .wrap_2 {
        padding-left: 1rem;
        padding-right: 1rem;
    }

    .btn {
        width: 100%;
        padding: 0.8rem 1rem;
        font-size: 1rem;
    }

    figure.image img {
        width: 100%;
    }
    
    .info-box {
        padding: 1rem;
    }
}

/* Animations */
@keyframes fadeIn {
    from { opacity: 0; transform: translateY(20px); }
    to { opacity: 1; transform: translateY(0); }
}

article {
    animation: fadeIn 0.8s ease-out forwards;
}