/* Reset & Basics */
* {
    box-sizing: border-box;
    margin: 0;
    padding: 0;
}

:root {
    --sidebar-width: 300px;
    --font-heading: 'Merriweather', serif;
    --font-body: 'Roboto', sans-serif;
    
    /* Colors */
    --color-bg: #f4f4f4;
    --color-sidebar: #001f3f; /* Dark Navy Blue */
    --color-sidebar-text: #ffffff;
    --color-text: #333333;
    --color-text-light: #666666;
    
    /* Journal Colors */
    --color-arthatama: #001f3f; /* Dark Navy Blue */
    --color-horizon: #d35400;   /* Dark Orange */
    --color-economic: #3a77ae;  /* New Blue for EBH */
    --color-integra: #2F318B;   /* Indigo for IBR, EIR, FID */
    --color-ldi: #A02F49;       /* Crimson for Law and Democracy Insight */
    --color-nes: #0D8472;       /* Teal for Nusantara Education Studies */
    --color-jaei: #5E6064;      /* Slate for Journal of Advanced Engineering */
    
    --color-primary: #001f3f; /* Dark Navy Blue */
    --color-primary-dark: #001429;
}

body {
    font-family: var(--font-body);
    background-color: var(--color-bg);
    color: var(--color-text);
    line-height: 1.6;
    overflow-x: hidden;
}

h1, h2, h3, h4 {
    font-family: var(--font-heading);
    font-weight: 700;
    margin-bottom: 1rem;
    color: inherit;
}

a {
    text-decoration: none;
    color: inherit;
    transition: color 0.2s ease;
}

ul {
    list-style: none;
}

/* Sidebar */
#sidebar {
    position: fixed;
    top: 0;
    left: 0;
    width: var(--sidebar-width);
    height: 100vh;
    background: var(--color-sidebar);
    color: var(--color-sidebar-text);
    padding: 2.5rem;
    display: flex;
    flex-direction: column;
    justify-content: center;
    z-index: 100;
}

.sidebar-inner {
    display: flex;
    flex-direction: column;
    height: 100%;
    justify-content: space-between;
}

#sidebar header .sidebar-logo {
    max-width: 100%;
    height: auto;
    margin-bottom: 1rem;
    display: block;
}

#sidebar header p {
    font-size: 0.9rem;
    color: rgba(255, 255, 255, 0.6);
}

#sidebar ul {
    margin: 2rem 0;
}

#sidebar ul li {
    margin-bottom: 1rem;
}

#sidebar ul li a {
    display: block;
    padding: 0.5rem 0;
    color: rgba(255, 255, 255, 0.6); /* Reduced opacity for normal state */
    font-weight: 500;
    border-bottom: 1px solid transparent;
}

#sidebar ul li a:hover,
#sidebar ul li a.active {
    color: #ffffff; /* Explicit white on hover/active */
    border-bottom-color: #ffffff;
}

#sidebar footer p {
    font-size: 0.8rem;
    color: rgba(255, 255, 255, 0.4);
}

/* Main Content Wrapper */
#wrapper {
    margin-left: var(--sidebar-width);
    width: calc(100% - var(--sidebar-width));
}

/* Panels / Sections */
.panel {
    min-height: 100vh;
    padding: 6rem 4rem;
    display: flex;
    align-items: center;
    position: relative;
    overflow: hidden;
}

.content {
    max-width: 1200px;
    width: 100%;
    z-index: 2;
    position: relative;
}

/* Hero Section */
#intro {
    background-color: var(--color-primary);
    color: #ffffff;
    justify-content: flex-start; /* Align top/left somewhat */
}

#intro h1 {
    font-size: 3.5rem;
    margin-bottom: 1.5rem;
    line-height: 1.2;
}

#intro p {
    font-size: 1.25rem;
    max-width: 800px;
    margin-bottom: 2rem;
    opacity: 0.9;
}

.button {
    display: inline-block;
    padding: 0.8rem 2rem;
    background: #ffffff;
    color: var(--color-primary);
    border-radius: 4px;
    font-weight: 700;
    text-transform: uppercase;
    letter-spacing: 1px;
    transition: background 0.3s ease, transform 0.2s ease;
}

.button:hover {
    background: #f0f0f0;
    transform: translateY(-2px);
}

/* What We Do Section */
#about {
    background-color: #d35400; /* Dark Orange */
    color: #ffffff;
}

#about h2 {
    font-size: 2.5rem;
    border-bottom: 2px solid rgba(255,255,255,0.3);
    padding-bottom: 1rem;
    margin-bottom: 2rem;
}

.features-grid {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 4rem;
    margin-top: 3rem;
}

.feature {
    display: flex;
    flex-direction: column;
}

.icon-wrapper {
    width: 48px;
    height: 48px;
    background: rgba(255, 255, 255, 0.2);
    border-radius: 50%;
    display: flex;
    align-items: center;
    justify-content: center;
    margin-bottom: 1.5rem;
}

.icon-wrapper svg {
    color: #ffffff;
}

.feature h3 {
    font-size: 1.3rem;
    margin-bottom: 1rem;
    display: flex;
    align-items: center;
}

.feature p {
    font-size: 1rem;
    opacity: 0.9;
}

/* Journals Section */
#journals {
    background-color: #4b4b9b; /* Blue/Purple from ref */
    background: #f4f4f4; /* Reset to light for cards */
    color: var(--color-text);
}

#journals h2 {
    color: var(--color-primary-dark);
    font-size: 2.5rem;
    margin-bottom: 1rem;
}

#journals > .content > p {
    margin-bottom: 3rem;
    font-size: 1.1rem;
    color: var(--color-text-light);
}

.journals-list {
    display: grid;
    grid-template-columns: 1fr;
    gap: 2rem;
}

.journal-card {
    display: flex;
    align-items: center; /* Center the image vertically relative to content */
    background: #ffffff;
    border-radius: 8px;
    overflow: hidden;
    box-shadow: 0 4px 6px rgba(0,0,0,0.1);
    transition: transform 0.3s ease;
    border-left: 10px solid transparent;
}

.journal-card:hover {
    transform: translateY(-5px);
    box-shadow: 0 10px 15px rgba(0,0,0,0.1);
}

.journal-image {
    flex: 0 0 212px; /* Adjusted to 1417:2000 ratio (212px width for ~300px height) */
    height: 300px;
    overflow: hidden;
    display: flex;
    align-items: center;
    justify-content: center;
}

.journal-image img {
    width: 100%;
    height: 100%;
    object-fit: contain; /* Ensure full cover visibility without cropping */
    background: #f0f0f0;
}

.journal-content {
    padding: 2rem;
    flex: 1;
}

.journal-card h3 {
    font-size: 2rem;
    margin-bottom: 0.5rem;
}

.journal-card .subtitle {
    font-family: var(--font-body);
    font-weight: 500;
    text-transform: uppercase;
    letter-spacing: 1px;
    font-size: 0.9rem;
    margin-bottom: 1.5rem;
    opacity: 0.7;
}

.journal-card p {
    margin-bottom: 1.5rem;
}

.journal-content p a {
    text-decoration: underline;
    text-underline-offset: 2px;
    color: inherit;
    font-weight: 500;
    opacity: 0.85;
}

.journal-content p a:hover {
    opacity: 1;
}

.button.small {
    padding: 0.5rem 1.5rem;
    font-size: 0.9rem;
    background: transparent;
    border: 2px solid currentColor;
}

.button.small:hover,
.journal-card .button.small:hover {
    background: var(--card-color);
    color: #ffffff;
}

/* Journal Specific Colors */
.journal-card.arthatama {
    --card-color: var(--color-arthatama);
    border-left-color: var(--card-color);
}
.journal-card.arthatama h3,
.journal-card.arthatama .button { color: var(--card-color); }

.journal-card.horizon {
    --card-color: var(--color-horizon);
    border-left-color: var(--card-color);
}
.journal-card.horizon h3,
.journal-card.horizon .button { color: var(--card-color); }

.journal-card.economic {
    --card-color: var(--color-economic);
    border-left-color: var(--card-color);
}
.journal-card.economic h3,
.journal-card.economic .button { color: var(--card-color); }

.journal-card.integra {
    --card-color: var(--color-integra);
    border-left-color: var(--card-color);
}
.journal-card.integra h3,
.journal-card.integra .button { color: var(--card-color); }

.journal-card.ldi {
    --card-color: var(--color-ldi);
    border-left-color: var(--card-color);
}
.journal-card.ldi h3,
.journal-card.ldi .button { color: var(--card-color); }

.journal-card.nes {
    --card-color: var(--color-nes);
    border-left-color: var(--card-color);
}
.journal-card.nes h3,
.journal-card.nes .button { color: var(--card-color); }

.journal-card.jaei {
    --card-color: var(--color-jaei);
    border-left-color: var(--card-color);
}
.journal-card.jaei h3,
.journal-card.jaei .button { color: var(--card-color); }

/* Contact Section */
#contact {
    background-color: #3a77ae; /* New Blue for Contact Section */
    color: #ffffff;
}

.contact-info {
    display: grid;
    grid-template-columns: repeat(2, 1fr);
    gap: 4rem;
    margin-top: 3rem;
}

.contact-item h3 {
    font-size: 1.2rem;
    margin-bottom: 0.5rem;
    opacity: 0.8;
}

.contact-item p, .contact-item a {
    font-size: 1.1rem;
    color: #ffffff;
}

/* Responsive */
@media screen and (max-width: 980px) {
    :root {
        --sidebar-width: 0px;
    }

    body {
        overflow-x: hidden;
    }
    
    #sidebar {
        width: 100%;
        height: auto;
        position: relative;
        padding: 1.5rem;
        overflow: hidden;
    }
    
    .sidebar-inner {
        align-items: center;
        text-align: center;
    }

    #sidebar header .sidebar-logo {
        max-width: 200px;
        margin: 0 auto 0.75rem;
    }
    
    #sidebar ul {
        display: grid;
        grid-template-columns: repeat(2, auto);
        justify-content: center;
        gap: 0.25rem 2rem;
        margin: 1rem 0;
    }

    #sidebar ul li a {
        font-size: 0.95rem;
        padding: 0.4rem 0;
    }

    #sidebar footer {
        margin-top: 0.5rem;
    }
    
    #wrapper {
        margin-left: 0;
        width: 100%;
    }
    
    .panel {
        padding: 3rem 1.25rem;
        min-height: auto;
    }

    #intro h1 {
        font-size: 2.2rem;
    }

    /* What We Do: single column */
    .features-grid {
        grid-template-columns: 1fr;
        gap: 2rem;
    }

    /* Contact: single column */
    .contact-info {
        grid-template-columns: 1fr;
        gap: 1.5rem;
    }

    .journal-card {
        flex-direction: column;
        border-left: none;
        border-top: 8px solid transparent;
    }

    .journal-card.arthatama { border-top-color: var(--color-arthatama); }
    .journal-card.horizon   { border-top-color: var(--color-horizon); }
    .journal-card.economic  { border-top-color: var(--color-economic); }
    .journal-card.integra   { border-top-color: var(--color-integra); }
    .journal-card.ldi       { border-top-color: var(--color-ldi); }
    .journal-card.nes       { border-top-color: var(--color-nes); }
    .journal-card.jaei      { border-top-color: var(--color-jaei); }

    .journal-image {
        flex: 0 0 auto;
        width: 100%;
        height: 280px;
    }

    .journal-card h3 {
        font-size: 1.5rem;
    }

    #about h2,
    #journals h2,
    #contact h2 {
        font-size: 2rem;
    }
}