/* ==================================================
   VIEWPORT & BODY FIX (CRITICAL FOR MOBILE FIXED)
================================================== */

html {
    width: 100%;
    height: 100%;
}

body {
    margin: 0;
    padding: 0;
    width: 100%;
    min-height: 100%;
    background: #f4f6f8;
}

/* Prevent transform context leakage */
body > * {
    transform: none;
}

/* ==================================================
   GLOBAL RESET
================================================== */

* {
    margin: 0;
    padding: 0;
    box-sizing: border-box;
    font-family: Arial, Helvetica, sans-serif;
}

/* ==================================================
   HEADER
================================================== */

.header {
    background: linear-gradient(90deg, #4f46e5, #7c3aed);
    color: #ffffff;
    padding: 14px 28px;
    display: flex;
    align-items: center;
    gap: 12px;
    box-shadow: 0 4px 12px rgba(0, 0, 0, 0.12);
    position: sticky;
    top: 0;
    z-index: 100;
    transform: none; /* DO NOT REMOVE */
}

.logo {
    display: flex;
    align-items: center;
    gap: 12px;
    text-decoration: none;
    color: inherit;
}

.logo img {
    max-height: 48px;
    max-width: 160px;
    width: auto;
    height: auto;
    object-fit: contain;
}

.logo span {
    letter-spacing: 0.5px;
    font-weight: bold;
}

/* ==================================================
   CONTAINER & COMMON UI
================================================== */

.container {
    max-width: 420px;
    margin: 60px auto;
    background: #ffffff;
    padding: 25px;
    border-radius: 10px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.08);
}

h1, h2 {
    margin-bottom: 15px;
    color: #111827;
}

input {
    width: 100%;
    padding: 12px;
    margin: 12px 0;
    border-radius: 6px;
    border: 1px solid #d1d5db;
    font-size: 15px;
}

button {
    width: 100%;
    padding: 12px;
    background: #4f46e5;
    color: #fff;
    border: none;
    border-radius: 6px;
    font-size: 16px;
    cursor: pointer;
}

button:hover {
    background: #4338ca;
}

.message {
    margin-bottom: 15px;
    color: #dc2626;
    text-align: center;
}

/* ==================================================
   DASHBOARD
================================================== */

.dashboard {
    max-width: 800px;
    margin: 40px auto;
    background: #fff;
    padding: 30px;
    border-radius: 10px;
}

.dashboard ul {
    list-style: none;
}

.dashboard li {
    padding: 12px 0;
    border-bottom: 1px solid #e5e7eb;
}

.dashboard a {
    text-decoration: none;
    color: #4f46e5;
    font-weight: bold;
}

.dashboard a:hover {
    text-decoration: underline;
}

.logout {
    display: inline-block;
    margin-top: 20px;
    color: #dc2626;
}

/* ==================================================
   MOBILE BOTTOM NAVIGATION (FINAL & FIXED)
================================================== */

.mobile-bottom-nav {
    position: fixed;
    left: 0;
    right: 0;
    bottom: 0;
    height: calc(64px + env(safe-area-inset-bottom));
    padding-bottom: env(safe-area-inset-bottom);
    background: linear-gradient(90deg, #4f46e5, #7c3aed);
    display: flex;
    justify-content: space-around;
    align-items: center;
    z-index: 2147483647;
    box-shadow: 0 -4px 12px rgba(0,0,0,0.18);
    will-change: transform;
}

.mobile-bottom-nav a {
    flex: 1;
    text-align: center;
    color: #ffffff;
    text-decoration: none;
    font-size: 12px;
    font-weight: 600;
}

.mobile-bottom-nav a span {
    display: block;
    font-size: 22px;
    line-height: 22px;
    margin-bottom: 4px;
}

/* Hide on desktop */
@media (min-width: 768px) {
    .mobile-bottom-nav {
        display: none;
    }
}

/* Space for mobile menu */
@media (max-width: 767px) {
    body {
        padding-bottom: 90px;
    }
}