* {
    box-sizing: border-box;
    font-family: -apple-system, BlinkMacSystemFont, "Segoe UI", Roboto, Arial;
}

html, body {
    margin: 0;
    padding: 0;
    width: 100%;
    overflow-x: hidden; /* 🔥 KEY FIX */
    background: #f1f3f6;
    color: #222;
}

/* ================= HEADER ================= */
.app-header {
    height: 56px;
    background: linear-gradient(135deg, #0d6efd, #0a58ca);
    color: #fff;
    display: flex;
    align-items: center;
    padding: 0 14px;
    font-size: 18px;
    font-weight: 600;
}

.menu-btn {
    font-size: 24px;
    margin-right: 14px;
    cursor: pointer;
}

/* ================= SIDE MENU ================= */
.side-menu {
    position: fixed;
    top: 0;
    left: -100%;
    width: 80%;
    max-width: 280px;
    height: 100%;
    background: #fff;
    box-shadow: 2px 0 15px rgba(0,0,0,0.2);
    transition: left 0.3s ease;
    z-index: 1000;
}

.side-menu.open {
    left: 0;
}

.side-menu h3 {
    margin: 0;
    padding: 16px;
    background: #0d6efd;
    color: #fff;
}

.side-menu a {
    display: block;
    padding: 15px 18px;
    text-decoration: none;
    color: #333;
    border-bottom: 1px solid #eee;
}

/* ================= CONTAINER ================= */
.container {
    padding: 16px;
    max-width: 100%;
}

/* ================= CARD ================= */
.card {
    background: #fff;
    border-radius: 16px;
    padding: 18px;
    margin-bottom: 16px;
    box-shadow: 0 6px 18px rgba(0,0,0,0.08);
}

.card h3 {
    margin: 0 0 12px 0;
    font-size: 16px;
}

/* ================= GRID ================= */
/* 🔥 MOBILE FIRST = SINGLE COLUMN */
.grid {
    display: grid;
    grid-template-columns: 1fr;
    gap: 16px;
}

/* ================= BUTTON ================= */
.btn {
    display: block;
    width: 100%;
    background: #0d6efd;
    color: #fff;
    border: none;
    padding: 14px;
    border-radius: 12px;
    font-size: 15px;
    text-align: center;
    text-decoration: none;
}

/* ================= FORM ================= */
label {
    font-size: 13px;
    font-weight: 600;
}

input, select {
    width: 100%;
    padding: 14px;
    border-radius: 12px;
    border: 1px solid #ccc;
    margin-top: 6px;
    margin-bottom: 14px;
    font-size: 15px;
}

/* ================= LOGIN ================= */
.login-wrapper {
    min-height: 100vh;
    display: flex;
    align-items: center;
    justify-content: center;
    padding: 16px;
}

.login-card {
    width: 100%;
    max-width: 380px;
    background: #fff;
    padding: 26px;
    border-radius: 20px;
    box-shadow: 0 10px 25px rgba(0,0,0,0.12);
}

.login-title {
    text-align: center;
    font-size: 22px;
    font-weight: 700;
    margin-bottom: 6px;
}

.login-sub {
    text-align: center;
    font-size: 14px;
    color: #666;
    margin-bottom: 22px;
}

/* ================= DESKTOP ENHANCEMENT ================= */
@media (min-width: 768px) {
    .container {
        max-width: 1100px;
        margin: auto;
    }

    .grid {
        grid-template-columns: repeat(2, 1fr);
    }

    .side-menu {
        width: 260px;
        left: -260px;
    }
}