/* ==========================================================================
   HỆ THỐNG MÀU SẮC (COLOR SYSTEM VARIABLES)
   ========================================================================== */
:root {
    --icatdev-color-bg: #0B0909;         /* Color 1: Nền chính */
    --icatdev-color-surface: #1a1e25;    /* Color 2: Nền phần tử / Cards */
    --icatdev-color-border: #233532;     /* Color 3: Đường viền & Hover Accent */
    --icatdev-color-text: #afb2aa;       /* Color 4: Chữ chính & Highlight */
    
    --icatdev-font-family: 'Poppins', -apple-system, BlinkMacSystemFont, sans-serif;
    --icatdev-header-height: 70px;
}

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

html {
    scroll-behavior: smooth;
    scroll-padding-top: calc(var(--icatdev-header-height) + 20px);
}

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

.icatdev-container {
    width: 100%;
    max-width: 1200px;
    margin: 0 auto;
    padding: 0 20px;
}

.icatdev-hidden {
    display: none !important;
}

/* ==========================================================================
   HEADER & NAVIGATION
   ========================================================================== */
.icatdev-header {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: var(--icatdev-header-height);
    background-color: var(--icatdev-color-surface);
    border-bottom: 1px solid var(--icatdev-color-border);
    z-index: 1000;
}

.icatdev-header-content {
    display: flex;
    justify-content: space-between;
    align-items: center;
    height: 100%;
}

.icatdev-logo {
    font-size: 1.5rem;
    font-weight: 700;
    color: var(--icatdev-color-text);
    text-decoration: none;
}

.icatdev-nav-list {
    display: flex;
    list-style: none;
    gap: 15px;
}

.icatdev-nav-link {
    color: var(--icatdev-color-text);
    text-decoration: none;
    font-weight: 500;
    font-size: 0.95rem;
    padding: 8px 16px;
    border-radius: 6px;
    transition: all 0.2s ease-in-out;
}

.icatdev-nav-link:hover,
.icatdev-nav-link.active {
    background-color: var(--icatdev-color-border);
    color: var(--icatdev-color-text);
}

.icatdev-menu-toggle {
    display: none;
    flex-direction: column;
    justify-content: space-between;
    width: 30px;
    height: 21px;
    background: transparent;
    border: none;
    cursor: pointer;
}

.icatdev-menu-toggle span {
    height: 3px;
    width: 100%;
    background-color: var(--icatdev-color-text);
    border-radius: 3px;
}

/* ==========================================================================
   MAIN SECTIONS LAYOUT
   ========================================================================== */
.icatdev-main {
    padding-top: calc(var(--icatdev-header-height) + 40px);
    padding-bottom: 60px;
}

.icatdev-section {
    background-color: var(--icatdev-color-surface);
    border: 1px solid var(--icatdev-color-border);
    border-radius: 12px;
    padding: 30px;
    margin-bottom: 40px;
}

/* Ghi đè riêng cho Typo Studio để nó chiếm toàn bộ không gian */
.icatdev-section#typo-studio {
    padding: 0;
    border: none;
    background-color: transparent;
}

.icatdev-section-header {
    margin-bottom: 20px;
    padding-bottom: 15px;
    border-bottom: 1px solid var(--icatdev-color-border);
}

.icatdev-section-header h2 {
    font-size: 1.6rem;
    font-weight: 600;
    color: var(--icatdev-color-text);
}

.icatdev-section-header p {
    font-size: 0.9rem;
    opacity: 0.8;
}

.icatdev-placeholder-box {
    min-height: 200px;
    display: flex;
    align-items: center;
    justify-content: center;
    border: 2px dashed var(--icatdev-color-border);
    border-radius: 8px;
    background-color: var(--icatdev-color-bg);
    opacity: 0.7;
}

.icatdev-spinner-container {
    display: flex;
    justify-content: center;
    align-items: center;
    min-height: 200px;
}

.icatdev-spinner {
    width: 40px;
    height: 40px;
    border: 4px solid var(--icatdev-color-border);
    border-top: 4px solid var(--icatdev-color-text);
    border-radius: 50%;
    animation: icatdev-spin 1s linear infinite;
}

@keyframes icatdev-spin {
    0% {
        transform: rotate(0deg);
    }
    100% {
        transform: rotate(360deg);
    }
}

.icatdev-ico-preview-item {
    background-color: var(--icatdev-color-surface);
    border: 1px solid var(--icatdev-color-border);
    border-radius: 8px;
    padding: 12px;
    display: flex;
    flex-direction: column;
    align-items: center;
    justify-content: center;
}

.icatdev-ico-canvas {
    width: 90px;
    height: 90px;
    display: flex;
    align-items: center;
    justify-content: center;
    overflow: hidden;
    border-radius: 4px;
    border: 1px solid var(--icatdev-color-border);
    /* Nền giả lập caro hỗ trợ nhìn kênh Alpha */
    background-image: 
        linear-gradient(45deg, #120b06 25%, transparent 25%), 
        linear-gradient(-45deg, #120b06 25%, transparent 25%), 
        linear-gradient(45deg, transparent 75%, #120b06 75%), 
        linear-gradient(-45deg, transparent 75%, #120b06 75%);
    background-size: 10px 10px;
    background-position: 0 0, 0 5px, 5px 5px, 5px 0;
    background-color: #000000;
}

.icatdev-ico-img {
    object-fit: contain;
    opacity: 0;
    transition: opacity 0.3s ease;
    image-rendering: pixelated;
}

.icatdev-ico-size-label {
    font-size: 0.7rem;
    opacity: 0.6;
    margin-top: 8px;
    font-family: monospace;
}

/* ==========================================================================
   FOOTER
   ========================================================================== */
.icatdev-footer {
    background-color: var(--icatdev-color-surface);
    border-top: 1px solid var(--icatdev-color-border);
    padding: 40px 0 20px 0;
}

.icatdev-footer-content {
    display: grid;
    grid-template-columns: 2fr 1fr;
    gap: 40px;
}

.icatdev-footer-info h3 { margin-bottom: 10px; font-size: 1.3rem; }
.icatdev-footer-info p { font-size: 0.9rem; opacity: 0.8; }
.icatdev-footer-links h4 { margin-bottom: 12px; font-size: 1rem; }
.icatdev-footer-links ul { list-style: none; }
.icatdev-footer-links li { margin-bottom: 8px; }
.icatdev-footer-links a {
    color: var(--icatdev-color-text);
    text-decoration: none;
    font-size: 0.85rem;
    opacity: 0.8;
}

.icatdev-footer-bottom {
    grid-column: 1 / -1;
    text-align: center;
    padding-top: 20px;
    border-top: 1px solid var(--icatdev-color-border);
    font-size: 0.8rem;
    opacity: 0.6;
}

/* Responsive */
@media (max-width: 768px) {
    .icatdev-menu-toggle { display: flex; }
    .icatdev-nav {
        position: absolute;
        top: var(--icatdev-header-height);
        left: 0; width: 100%;
        background-color: var(--icatdev-color-surface);
        border-bottom: 1px solid var(--icatdev-color-border);
        display: none;
        padding: 20px 0;
    }
    .icatdev-nav.active { display: block; }
    .icatdev-nav-list { flex-direction: column; align-items: center; }
    .icatdev-footer-content { grid-template-columns: 1fr; }
}