:root {
    --bg: #0f172a;
    --panel: #111827;
    --muted: #1f2937;
    --text: #e5e7eb;
    --text-dim: #9ca3af;
    --accent: #22d3ee;
    --accent-2: #a78bfa;
    --radius: 16px;
    --gap: 16px;
    --shadow: 0 8px 24px rgba(0, 0, 0, .35);
}

* {
    box-sizing: border-box;
}

html,
body {
    height: 100%;
}

body {
    margin: 0;
    font-family: ui-sans-serif, system-ui, -apple-system, Segoe UI, Roboto, Ubuntu, Cantarell, Noto Sans, Helvetica Neue, Arial, "Apple Color Emoji", "Segoe UI Emoji";
    background: radial-gradient(1200px 800px at 10% 0%, #0b122b, var(--bg));
    color: var(--text);
    line-height: 1.5;
}

/* Layout */
.layout {
    min-height: 100svh;
    display: grid;
    grid-template-areas:
        "nav nav nav"
        "left main right"
        "footer footer footer";
    grid-template-columns: 280px 1fr 280px;
    grid-template-rows: auto 1fr auto;
    gap: var(--gap);
    padding: var(--gap);
}

/* Top Nav - FIXED FOR RESPONSIVENESS */
nav.topbar {
    grid-area: nav;
    background: linear-gradient(135deg, var(--panel), #0b1223);
    border: 1px solid #1f2937;
    border-radius: var(--radius);
    padding: 12px 16px;
    box-shadow: var(--shadow);
    display: flex;
    align-items: center;
    justify-content: space-between;
    position: sticky;
    top: 8px;
    z-index: 20;
    backdrop-filter: blur(6px);
    flex-wrap: wrap;
}

.brand {
    display: flex;
    align-items: center;
    gap: 12px;
    font-weight: 700;
    letter-spacing: .3px;
}

.brand .logo {
    width: 36px;
    height: 36px;
    border-radius: 50%;
    background-image: url("zeesu.jpeg"); 
    background-size: cover;  
    background-position: center; 
    filter: drop-shadow(0 4px 12px rgba(237, 5, 5, 0.35));
}

.brand span {
    font-size: 1.05rem;
}

.nav-links {
    display: flex;
    gap: 8px;
    flex-wrap: wrap;
}

.nav-links a {
    text-decoration: none;
    color: var(--text);
    padding: 8px 12px;
    border-radius: 999px;
    border: 1px solid #243042;
    background: #0b1223;
    transition: transform .15s ease, background .15s ease, border-color .15s ease;
    font-size: .95rem;
}

.nav-links a:hover {
    transform: translateY(-1px);
    border-color: var(--accent);
}

.toggles {
    display: none;
    gap: 8px;
}

.toggle-btn {
    border: 1px solid #233047;
    background: #0b1223;
    color: var(--text);
    padding: 8px 12px;
    border-radius: 10px;
    cursor: pointer;
}

/* Sidebars */
aside {
    background: linear-gradient(180deg, var(--panel), #0b1223 120%);
    border: 1px solid #1f2937;
    border-radius: var(--radius);
    padding: 16px;
    box-shadow: var(--shadow);
    position: relative;
}

aside h2 {
    margin: 0 0 12px;
    font-size: 1rem;
    font-weight: 700;
    color: var(--accent);
}

aside.left {
    grid-area: left;
}

aside.right {
    grid-area: right;
}

.menu {
    display: grid;
    gap: 6px;
    list-style: none;
    padding: 0;
    margin: 0;
}

.menu li a {
    display: block;
    text-decoration: none;
    color: var(--text);
    padding: 10px 12px;
    border-radius: 10px;
    border: 1px solid #233047;
    background: #0b1223;
    transition: border-color .15s ease, transform .15s ease;
}

.menu li a:hover {
    border-color: var(--accent-2);
    transform: translateX(2px);
}

/* Main */
main {
    grid-area: main;
    background: linear-gradient(180deg, #0c152e, #0a1226 120%);
    border: 1px solid #1f2937;
    border-radius: var(--radius);
    padding: 20px;
    box-shadow: var(--shadow);
}

main h1 {
    margin-top: 0;
    font-size: 1.6rem;
}

.muted {
    color: var(--text-dim);
}

/* Footer */
footer {
    grid-area: footer;
    background: linear-gradient(135deg, var(--panel), #0b1223);
    border: 1px solid #1f2937;
    border-radius: var-radius;
    padding: 16px;
    box-shadow: var(--shadow);
    font-size: .95rem;
    display: flex;
    align-items: center;
    justify-content: space-between;
    gap: 12px;
    flex-wrap: wrap;
}

.footer-links {
    display: flex;
    gap: 12px;
    flex-wrap: wrap;
}

.footer-links a {
    color: var(--text-dim);
    text-decoration: none;
}

.footer-links a:hover {
    color: var(--accent);
}

.container p {
    font-weight: 600;
    font-size: 15px;
    margin-bottom: 8px;
    text-align: center;  
}

.container input {
    width: 100%;
    height: 50%;
    border: 1px solid #494eea;
    outline: 0;
    padding: 10px;
    margin: 10px 0 20px;
    border-radius: 5px;
}

.container button {
    width: 50%;
    height: 40px;
    background: #494eeac2;
    color: #fff;
    border: 0;
    outline: 0;
    border-radius: 5px;
    box-shadow: 0 10px 10px rgba(0, 0, 0, 0.1);
    cursor: pointer;
    margin: 20px auto; 
    font-weight: 500;
    display: block;     
}

#imgBox {
    width: 200px;
    border-radius: 5px;
    max-height: 0;
    overflow: hidden;
    transition: max-height 1s;
}
#imgBox img {
    width: 100%;
    padding: 10px;
}
#imgBox.show-img {
    max-height: 300px;
    margin: 10px auto;
    border: 1px solid #d1d1d1;
}

/* RESPONSIVE DESIGN IMPROVEMENTS */
@media (max-width: 1100px) {
    .layout {
        grid-template-columns: 240px 1fr 240px;
    }
    
    .nav-links {
        gap: 6px;
    }
    
    .nav-links a {
        padding: 6px 10px;
        font-size: 0.9rem;
    }
}

@media (max-width: 900px) {
    .layout {
        grid-template-areas:
            "nav"
            "main"
            "footer";
        grid-template-columns: 1fr;
    }

    aside.left,
    aside.right {
        display: none;
    }

    .nav-links {
        display: none;
    }

    .toggles {
        display: flex;
    }
    
    /* Mobile navigation improvements */
    nav.topbar {
        padding: 10px;
    }
    
    .brand span {
        font-size: 1rem;
    }
}

@media (max-width: 600px) {
    .layout {
        padding: 10px;
        gap: 10px;
    }
    
    nav.topbar {
        position: relative;
        top: 0;
    }
    
    .brand {
        flex: 1;
    }
    
    .toggles {
        flex-shrink: 0;
    }
    
    main {
        padding: 15px;
    }
    
    footer {
        flex-direction: column;
        text-align: center;
        gap: 10px;
    }
    
    .footer-links {
        justify-content: center;
    }
    
    .container button {
        width: 70%;
    }
}

/* Off-canvas panels for mobile */
.drawer {
    position: fixed;
    inset: 0 0 0 auto;
    width: 80%;
    max-width: 320px;
    height: 100svh;
    background: linear-gradient(180deg, var(--panel), #0b1223 120%);
    border-left: 1px solid #1f2937;
    transform: translateX(100%);
    transition: transform .2s ease-out;
    z-index: 50;
    display: flex;
    flex-direction: column;
    gap: 12px;
    padding: 16px;
    overflow-y: auto;
}

.drawer.open {
    transform: translateX(0);
}

.drawer header {
    display: flex;
    justify-content: space-between;
    align-items: center;
    padding-bottom: 10px;
    border-bottom: 1px solid #1f2937;
}

.backdrop {
    position: fixed;
    inset: 0;
    background: rgba(0, 0, 0, .45);
    backdrop-filter: blur(2px);
    opacity: 0;
    pointer-events: none;
    transition: opacity .2s;
    z-index: 40;
}

.backdrop.show {
    opacity: 1;
    pointer-events: auto;
}

.sr-only {
    position: absolute;
    width: 1px;
    height: 1px;
    padding: 0;
    margin: -1px;
    overflow: hidden;
    clip: rect(0, 0, 0, 0);
    white-space: nowrap;
    border: 0;
}