:root{
    --primary:#4f46e5;
    --secondary:#06b6d4;
    --danger:#ef4444;

    --bg:#f4f6fb;
    --card:#ffffff;
    --text:#1f2937;
    --muted:#6b7280;
}

/* 🌙 DARK MODE */
body.dark{
    --bg:#0f172a;
    --card:#1e293b;
    --text:#e5e7eb;
    --muted:#94a3b8;
}

.toggle-dark{
    cursor:pointer;
    font-size:18px;
    padding:6px 10px;
    border-radius:10px;
    transition:0.3s;
}

.toggle-dark:hover{
    background:rgba(0,0,0,0.1);
}

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

body{
    font-family:'Segoe UI', sans-serif;
    background: var(--bg);
    color: var(--text);
    min-height:100vh;
}

/* ===== NAVBAR (MODERN APP STYLE) ===== */
.navbar{
    position:sticky;
    top:0;
    z-index:1000;
    display:flex;
    justify-content:space-between;
    align-items:center;
    padding:12px 18px;
    background:rgba(255,255,255,0.85);
    backdrop-filter: blur(12px);
    box-shadow:0 4px 20px rgba(0,0,0,0.06);
}

.navbar .logo{
    font-weight:bold;
    font-size:18px;
    color:var(--primary);
}

.navbar .menu{
    display:flex;
    gap:14px;
    align-items:center;
}

.navbar .menu a{
    text-decoration:none;
    color:var(--text);
    font-weight:500;
    padding:6px 10px;
    border-radius:10px;
    transition:0.2s;
}

.navbar .menu a:hover{
    background:#eef2ff;
}

.navbar .logout{
    background:var(--danger);
    color:white !important;
}

/* MOBILE NAV */
@media(max-width:768px){
    .navbar .menu{
        position:fixed;
        bottom:0;
        left:0;
        right:0;
        background:white;
        padding:10px;
        justify-content:space-around;
        box-shadow:0 -4px 20px rgba(0,0,0,0.08);
    }
}

/* ===== CONTAINER ===== */
.container{
    width:100%;
    max-width:650px;
    margin:20px auto;
    padding:0 12px;
}

/* ===== CARDS (POSTS / FRIENDS / BOXES) ===== */
.post, .post-box, .card{
    background:var(--card);
    border-radius:18px;
    padding:14px;
    margin-bottom:14px;
    box-shadow:0 10px 25px rgba(0,0,0,0.06);
    transition:0.25s;
}

.post:hover, .card:hover{
    transform:translateY(-3px);
}

/* ===== BUTTONS ===== */
.btn, button{
    background:linear-gradient(135deg,var(--primary),var(--secondary));
    border:none;
    color:white;
    padding:10px 14px;
    border-radius:12px;
    font-weight:500;
    cursor:pointer;
    transition:0.2s;
    display:inline-block;
    text-decoration:none;
}

.btn:hover, button:hover{
    transform:scale(1.05);
    opacity:0.9;
}

/* danger button */
.btn-danger{
    background:var(--danger);
}

/* ===== INPUTS ===== */
input, textarea{
    width:100%;
    padding:12px;
    margin-top:10px;
    border-radius:12px;
    border:1px solid #e5e7eb;
    outline:none;
    font-size:14px;
    transition:0.2s;
}

input:focus, textarea:focus{
    border-color:var(--primary);
    box-shadow:0 0 10px rgba(79,70,229,0.2);
}

/* ===== PROFILE IMAGE ===== */
img{
    object-fit:cover;
}

/* ===== MOBILE ===== */
@media(max-width:480px){
    .post, .card, .post-box{
        padding:12px;
        border-radius:14px;
    }

    .btn, button{
        width:100%;
        text-align:center;
    }
}



/* NAVBAR THEME SAFE */
.navbar{
    background:var(--card);
    color:var(--text);
}

/* MENU LINKS */
.navbar .menu a{
    color:var(--text);
}

/* LOGO */
.navbar .logo{
    color:var(--primary);
}

/* LOGOUT */
.navbar .logout{
    background:var(--danger);
    color:white !important;
}

/* DARK MODE SWITCH (PRO LOOK) */
.theme-switch{
    width:45px;
    height:24px;
    background:#e5e7eb;
    border-radius:50px;
    display:flex;
    align-items:center;
    padding:3px;
    cursor:pointer;
    margin-left:10px;
    transition:0.3s;
}

body.dark .theme-switch{
    background:#334155;
}

.theme-switch .circle{
    width:18px;
    height:18px;
    background:white;
    border-radius:50%;
    display:flex;
    align-items:center;
    justify-content:center;
    font-size:12px;
    transform:translateX(0);
    transition:0.3s;
}

body.dark .theme-switch .circle{
    transform:translateX(20px);
    background:#0f172a;
}

/* DARK MODE NAVBAR FIX */
body.dark .navbar{
    background:#1e293b;
}

body.dark .navbar .menu a{
    color:#e5e7eb;
}

body.dark .navbar .menu a:hover{
    background:#334155;
}



/* NOTIFICATION ICON */
.notif{
    position:relative;
    font-size:18px;
    text-decoration:none;
    color:var(--text);
    padding:6px 10px;
    border-radius:10px;
    transition:0.2s;
}

.notif:hover{
    background:#eef2ff;
}

/* RED BADGE */
.badge{
    position:absolute;
    top:0px;
    right:0px;
    background:red;
    color:white;
    font-size:10px;
    width:16px;
    height:16px;
    display:flex;
    align-items:center;
    justify-content:center;
    border-radius:50%;
    font-weight:bold;
    animation:pulse 1.5s infinite;
}

/* PULSE ANIMATION */
@keyframes pulse{
    0%{ transform:scale(1); }
    50%{ transform:scale(1.2); }
    100%{ transform:scale(1); }
}

/* DARK MODE FIX */
body.dark .notif:hover{
    background:#334155;
}